WorldWideScience

Sample records for bionics

  1. Bionic Nanosystems

    Science.gov (United States)

    Sebastian Mannoor, Manu

    Direct multidimensional integration of functional electronics and mechanical elements with viable biological systems could allow for the creation of bionic systems and devices possessing unique and advanced capabilities. For example, the ability to three dimensionally integrate functional electronic and mechanical components with biological cells and tissue could enable the creation of bionic systems that can have tremendous impact in regenerative medicine, prosthetics, and human-machine interfaces. However, as a consequence of the inherent dichotomy in material properties and limitations of conventional fabrication methods, the attainment of truly seamless integration of electronic and/or mechanical components with biological systems has been challenging. Nanomaterials engineering offers a general route for overcoming these dichotomies, primarily due to the existence of a dimensional compatibility between fundamental biological functional units and abiotic nanomaterial building blocks. One area of compelling interest for bionic systems is in the field of biomedical sensing, where the direct interfacing of nanosensors onto biological tissue or the human body could stimulate exciting opportunities such as on-body health quality monitoring and adaptive threat detection. Further, interfacing of antimicrobial peptide based bioselective probes onto the bionic nanosensors could offer abilities to detect pathogenic bacteria with bio-inspired selectivity. Most compellingly, when paired with additive manufacturing techniques such as 3D printing, these characteristics enable three dimensional integration and merging of a variety of functional materials including electronic, structural and biomaterials with viable biological cells, in the precise anatomic geometries of human organs, to form three dimensionally integrated, multi-functional bionic hybrids and cyborg devices with unique capabilities. In this thesis, we illustrate these approaches using three representative

  2. The bionic human

    OpenAIRE

    Francalanza, Emmanuel; Duca, Edward

    2013-01-01

    Faster, fitter and flawless? What would it take to build a Bionic Human? Emmanuel Francalanza delved into research at the Faculty of Engineering to see how Malta could contribute. 3D Art by Jean Claude Vancell.

  3. Cochlear bionic acoustic metamaterials

    Science.gov (United States)

    Ma, Fuyin; Wu, Jiu Hui; Huang, Meng; Fu, Gang; Bai, Changan

    2014-11-01

    A design of bionic acoustic metamaterial and acoustic functional devices was proposed by employing the mammalian cochlear as a prototype. First, combined with the experimental data in previous literatures, it is pointed out that the cochlear hair cells and stereocilia cluster are a kind of natural biological acoustic metamaterials with the negative stiffness characteristics. Then, to design the acoustic functional devices conveniently in engineering application, a simplified parametric helical structure was proposed to replace actual irregular cochlea for bionic design, and based on the computational results of such a bionic parametric helical structure, it is suggested that the overall cochlear is a local resonant system with the negative dynamic effective mass characteristics. There are many potential applications in the bandboard energy recovery device, cochlear implant, and acoustic black hole.

  4. Coming Soon: The Bionic Man

    Science.gov (United States)

    Woodard, Colin

    2006-01-01

    This article describes the latest advancement in the development of prosthetic arms. Bionic researchers are making significant advances in creating more agile prosthetics that users can control via their own nervous system. The bionic arm, which is still under development, can not only execute complex, thought-controlled movements, but also can…

  5. Significance and Progress of Bionics

    Institute of Scientific and Technical Information of China (English)

    Yongxiang Lu

    2004-01-01

    The four topics are described including the driving force and source of the scientific and technological creation, the definition and history of the bionics, the important significance of bionics in the development of the human beings, and the leading edge and progress of bionics. The appetency of human for the creation is the essential motivity of the innovation in science and technology. Nature and society are the objects for us to cognize and serve, meanwhile, the best teachers for us to learn from them. It is only 5 million years for human's development, but evolution of life has over 3.5 billion years history. Although, copying the creation from the human being is important, however, it has much more potential and opportunity in imitating the nature, and more possibility to promote the ability of original innovation. The significance and progress of bionics are summarized, in this paper, and the leading edges of bionics, in the near future, are forecasted.

  6. Holographic Cosmology from BIonic Solutions

    OpenAIRE

    Sepehri, Alireza; Faizal, Mir; Setare, Mohammad Reza; Ali, Ahmed Farag

    2015-01-01

    In this paper, we will use a BIonic solution for analysing the holographic cosmology. A BIonic solution is a configuration of a D-brane and an anti-D-brane connected by a wormhole. A BIonic configuration can form due to a transition of fundamental black strings. After the BIon has formed, the wormhole in the BIon will act act as a channel for the energy to flow into the D3-brane. This will increase the degrees of freedom of the D3-brane causing inflation. The inflation will end when the wormh...

  7. Development of Bionic Polymers

    Institute of Scientific and Technical Information of China (English)

    Xu Jian; Xie Qiongdan; Guo Xinlin; Feng Lin; Jiang Lei; Tang Wenghong; Luo Xiandong; Zhang Xiaoli; Han Charles C.

    2004-01-01

    Bionics, an artificial imitation of natural products, has always been a forever dream in the fairy tale or scientific fiction when we were childhood and children live now. However, the development of science in molecular scale makes this dream of childhood and manhood realize today.Bionics, a branch of science concerned with application the data about the functioning of biological system to the solution of engineering problems, become top-priority of science in the 21st century.However, few examples are given in molecular-level or nano-scale controlling lotus-like surface (a bionic surface for vast potential application). In the same time, such a typical bionic surface (as well known, so called "Lotus-effect") is a symbol or a totem that scientists can develop a novel approach to prepare desired surface and to control its microstructure or morphology at one's pleasure.In general, a film with a water contact angle (CA) higher than 150° can be defined as a superhydrophobic surface. The Langmuir-Blodgett film prepared by using CF3(CF2)10COOH possesses the lowest surface tension, which is 6 mJ/m2 (1). However, the water CA on a smooth surface with regularly aligned C20F42 with close-hexagonal packed -CF3 groups is only 119° (2).Obviously, only adjusting chemical composition is not enough to produce a superhydrophobic surface. Wenzel et al (3) suggested that the contact angle θ' of a liquid droplet on a rough solid surface should be written as:cosθ, =γcosθ = γ(γs-γsl)/γl, here γ is a roughness factor and γsl, γs and γl denote the interfacial tensions of the solid-liquid, the solid-gas, and the liquid-gas interfaces,respectively. This γ is always larger than 1 and a rough surface will be more water-repellent or more wettable to a liquid when intrinsic contact angle θ is bigger or smaller than 90°, respectively.Therefore, a general approach to obtain superhydrophobic surfaces is using a combination of depressing surface energy and enhancing surface

  8. Holographic Cosmology from BIonic Solutions

    CERN Document Server

    Sepehri, Alireza; Setare, Mohammad Reza; Ali, Ahmed Farag

    2015-01-01

    In this paper, we will use a BIonic solution for analysing the holographic cosmology. A BIonic solution is a configuration of a D-brane and an anti-D-brane connected by a wormhole. A BIonic configuration can form due to a transition of fundamental black strings. After the BIon has formed, the wormhole in the BIon will act act as a channel for the energy to flow into the D3-brane. This will increase the degrees of freedom of the D3-brane causing inflation. The inflation will end when the wormhole gets annihilated. However, as the distance between the D3-brane and the anti-D3-brane reduces, tachyonic states get created. These tachyonic states will lead to the formation of a new wormhole. This new wormhole will again increasing the degrees of freedom on the D3-brane causing late time acceleration.

  9. Getting the Measure of Bionics

    Institute of Scientific and Technical Information of China (English)

    Julian Vincent

    2005-01-01

    @@ In this issue of the Journal of Bionics Engineering we start something which is novel in academic publication but which is not at all uncommon in other serial publications. We present, in a series of seven chapters, a book on the interrelations between biology and engineering. It is not a handbook of bionics (though that might follow) but a series of essays that will bridge the gap between biology and engineering. We hope you will find them entertaining and informative, and that they will reinforce and revise areas of your knowledge,no matter what your entry point into this subject.

  10. [The bionic hand].

    Science.gov (United States)

    Surke, Carsten; Ducommun Dit Boudry, Pascal; Vögelin, Esther

    2015-08-01

    The loss of the upper extremity implicates a grave insult in the life of the involved person. To compensate for the loss of function different powered prosthetic devices are available. Ever since their first development 70 years ago numerous improvements in terms of size, weight and wearing comfort have been developed, but issues regarding the control of upper extremity prostheses remain. Slow grasping speed, limited grip positions and especially failure to provide a sensory feedback limit the acceptance in patients. Recent developments are aimed to allow a more intuitive control of the prosthetic device and to provide a sensory feedback to the amputee. Targeted reinnervation reassignes existing muscles to different peripheral nerves thereby enabling them to fulfill alternate functions. Implanting electrodes into muscle bellies of the forearm allows a more accurate control of the prosthesis. Promising results are being achieved by implanting nerve electrodes by establishing bilateral communication between patient and prosthesis. The following review summarizes the current developments of bionic prostheses in the upper extremity.

  11. 3D Printed Bionic Ears

    OpenAIRE

    Mannoor, Manu S.; Jiang, Ziwen; James, Teena; Kong, Yong Lin; Malatesta, Karen A.; Soboyejo, Winston O.; Verma, Naveen; Gracias, David H.; McAlpine, Michael C.

    2013-01-01

    The ability to three-dimensionally interweave biological tissue with functional electronics could enable the creation of bionic organs possessing enhanced functionalities over their human counterparts. Conventional electronic devices are inherently two-dimensional, preventing seamless multidimensional integration with synthetic biology, as the processes and materials are very different. Here, we present a novel strategy for overcoming these difficulties via additive manufacturing of biologica...

  12. Bionic machines and systems

    Energy Technology Data Exchange (ETDEWEB)

    Halme, A.; Paanajaervi, J. (eds.)

    2004-07-01

    Introduction Biological systems form a versatile and complex entirety on our planet. One evolutionary branch of primates, called humans, has created an extraordinary skill, called technology, by the aid of which it nowadays dominate life on the planet. Humans use technology for producing and harvesting food, healthcare and reproduction, increasing their capability to commute and communicate, defending their territory etc., and to develop more technology. As a result of this, humans have become much technology dependent, so that they have been forced to form a specialized class of humans, called engineers, who take care of the knowledge of technology developing it further and transferring it to later generations. Until now, technology has been relatively independent from biology, although some of its branches, e.g. biotechnology and biomedical engineering, have traditionally been in close contact with it. There exist, however, an increasing interest to expand the interface between technology and biology either by directly utilizing biological processes or materials by combining them with 'dead' technology, or by mimicking in technological solutions the biological innovations created by evolution. The latter theme is in focus of this report, which has been written as the proceeding of the post-graduate seminar 'Bionic Machines and Systems' held at HUT Automation Technology Laboratory in autumn 2003. The underlaying idea of the seminar was to analyze biological species by considering them as 'robotic machines' having various functional subsystems, such as for energy, motion and motion control, perception, navigation, mapping and localization. We were also interested about intelligent capabilities, such as learning and communication, and social structures like swarming behavior and its mechanisms. The word 'bionic machine' comes from the book which was among the initial material when starting our mission to the fascinating world

  13. "Bionic Woman" (2007): Gender, Disability and Cyborgs

    Science.gov (United States)

    Quinlan, Margaret M.; Bates, Benjamin R.

    2009-01-01

    This paper explores a representation of overlapping categories of gender, disability and cyborgs in "Bionic Woman" (2007). The television show "Bionic Woman" (2007) is a popular culture representation that uniquely brings together these categories. Three themes emerged from an analysis of blogger discourse surrounding the show. The themes reveal…

  14. 3D printed bionic ears.

    Science.gov (United States)

    Mannoor, Manu S; Jiang, Ziwen; James, Teena; Kong, Yong Lin; Malatesta, Karen A; Soboyejo, Winston O; Verma, Naveen; Gracias, David H; McAlpine, Michael C

    2013-06-12

    The ability to three-dimensionally interweave biological tissue with functional electronics could enable the creation of bionic organs possessing enhanced functionalities over their human counterparts. Conventional electronic devices are inherently two-dimensional, preventing seamless multidimensional integration with synthetic biology, as the processes and materials are very different. Here, we present a novel strategy for overcoming these difficulties via additive manufacturing of biological cells with structural and nanoparticle derived electronic elements. As a proof of concept, we generated a bionic ear via 3D printing of a cell-seeded hydrogel matrix in the anatomic geometry of a human ear, along with an intertwined conducting polymer consisting of infused silver nanoparticles. This allowed for in vitro culturing of cartilage tissue around an inductive coil antenna in the ear, which subsequently enables readout of inductively-coupled signals from cochlea-shaped electrodes. The printed ear exhibits enhanced auditory sensing for radio frequency reception, and complementary left and right ears can listen to stereo audio music. Overall, our approach suggests a means to intricately merge biologic and nanoelectronic functionalities via 3D printing. PMID:23635097

  15. 3D printed bionic ears.

    Science.gov (United States)

    Mannoor, Manu S; Jiang, Ziwen; James, Teena; Kong, Yong Lin; Malatesta, Karen A; Soboyejo, Winston O; Verma, Naveen; Gracias, David H; McAlpine, Michael C

    2013-06-12

    The ability to three-dimensionally interweave biological tissue with functional electronics could enable the creation of bionic organs possessing enhanced functionalities over their human counterparts. Conventional electronic devices are inherently two-dimensional, preventing seamless multidimensional integration with synthetic biology, as the processes and materials are very different. Here, we present a novel strategy for overcoming these difficulties via additive manufacturing of biological cells with structural and nanoparticle derived electronic elements. As a proof of concept, we generated a bionic ear via 3D printing of a cell-seeded hydrogel matrix in the anatomic geometry of a human ear, along with an intertwined conducting polymer consisting of infused silver nanoparticles. This allowed for in vitro culturing of cartilage tissue around an inductive coil antenna in the ear, which subsequently enables readout of inductively-coupled signals from cochlea-shaped electrodes. The printed ear exhibits enhanced auditory sensing for radio frequency reception, and complementary left and right ears can listen to stereo audio music. Overall, our approach suggests a means to intricately merge biologic and nanoelectronic functionalities via 3D printing.

  16. Structural Bionic Design of Machine Tool Structures

    Institute of Scientific and Technical Information of China (English)

    ZHAO Ling; WANG Ting; GUO Hong-liang; LI Guo-meng

    2011-01-01

    A structural bionic design process is systematically presented for lightweight mechanical structures. By mimicking biological excellent structural principles, the stiffening ribs of a machining table and a moving column were redesigned for better load-bearing efficiency. Finite element method(FEM) simulation and model experiments were carried out for performance verification, which showed the increase of structural static and dynamic performance. Structural bionic offers a new solution to change conventional structures for high specific stiffness.

  17. Structural Bionic Design for Digging Shovel of Cassava Harvester Considering Soil Mechanics

    OpenAIRE

    Shihao Liu; Shaojie Weng; Yulan Liao; Dongyun Zhu

    2014-01-01

    In order to improve the working performance of cassava harvester, structural bionic design for its digging shovel was conducted. Taking the oriental mole cricket's paws as bionic prototype, a new structural bionic design method for digging shovel was established, which considers the morphology-configuration-function coupling bionic. A comprehensive performance comparison method was proposed, which is used to select the bionic design schemes. The proposed bionic design method was used to impro...

  18. Development of artificial bionic baroreflex system.

    Science.gov (United States)

    Sunagawa, Kenji; Sugimachi, Masaru

    2010-01-01

    The baroreflex system is the fastest mechanism in the body to regulate arterial pressure. Because the neural system (i.e., autonomic nervous system) mediates the baroreflex and the system operates under the closed-loop condition, the quantitative dynamic characteristics of the baroreflex system remained unknown until recently despite the fact that a countless number of observational and qualitative studies had been conducted. In order to develop the artificial baroreflex system, i.e., the bionic baroreflex system, we first anatomically isolated the carotid sinuses to open the baroreflex loop and identified the open-loop transfer function of the baroreflex system using white noise pressure perturbations. We found that the baroreflex system is basically a lowpass filter and remarkably linear. As an actuator to implement the bionic baroreflex system, we then stimulated the sympathetic efferent nerves at various parts of the baroreflex loop and identified the transfer functions from the stimulation sites to systemic arterial pressure. We found that the actuator responses can be described remarkably well with linear transfer functions. Since transfer functions of the native baroreflex and of the actuator were identified, the controller that is required to reproduce the native baroreflex transfer function can be easily derived from those transfer functions. To examine the performance of bionic baroreflex system, we implemented it animal models of baroreflex failure. The bionic baroreflex system restored normal arterial pressure regulation against orthostatic stresses that is indistinguishable from the native baroreflex system.

  19. Bionic Humans Using EAP as Artificial Muscles Reality and Challenges

    OpenAIRE

    Yoseph Bar-Cohen

    2004-01-01

    For many years, the idea of a human with bionic muscles immediately conjures up science fiction images of a TV series superhuman character that was implanted with bionic muscles and portrayed with strength and speed far superior to any normal human. As fantastic as this idea may seem, recent developments in electroactive polymers (EAP) may one day make such bionics possible. Polymers that exhibit large displacement in response to stimulation that is other than electrical signa...

  20. Bionics in Engineering Education Considerations, Experiences and Conclusions

    OpenAIRE

    Ralf Neurohr; Cristian Dragomirescu

    2008-01-01

    During recent years bionics, a new discipline which is in charge with the transfer of the principles of construction, regulation, interaction and organisation of biology into innovative technical solutions, has attracted significant interest from various industries. Based on this request for bionic expertise in engineering, the faculty for teaching engineering in foreign languages (FILS) at ‘Politehnica’ University of Bucharest started a course in bionics in SS 2007, which was supported by th...

  1. Fermentation based carbon nanotube multifunctional bionic composites

    OpenAIRE

    Luca Valentini; Silvia Bittolo Bon; Stefano Signetti; Manoj Tripathi; Erica Iacob; Pugno, Nicola M.

    2016-01-01

    The exploitation of the processes used by microorganisms to digest nutrients for their growth can be a viable method for the formation of a wide range of so called biogenic materials that have unique properties that are not produced by abiotic processes. Here we produced living hybrid materials by giving to unicellular organisms the nutrient to grow. Based on bread fermentation, a bionic composite made of carbon nanotubes (CNTs) and a single-cell fungi, the Saccharomyces cerevisiae yeast extr...

  2. Fermentation based carbon nanotube bionic functional composites

    OpenAIRE

    Valentini, Luca; Bon, Silvia Bittolo; Signetti, Stefano; Tripathi, Manoj; Iacob, Erica; Pugno, Nicola M.

    2016-01-01

    The exploitation of the processes used by microorganisms to digest nutrients for their growth can be a viable method for the formation of a wide range of so called biogenic materials that have unique mechanical and physical properties that are not produced by abiotic processes. Based on grape must and bread fermentation, a bionic composite made of carbon nanotubes (CNTs) and single-cell fungi, the Saccharomyces cerevisiae yeast extract, was prepared by fermentation of such microorganisms at r...

  3. Bionic engineering - R-madillo project

    OpenAIRE

    Hoogendijk, Roos; Huau, Benjamin; Renault, Sébastien; Stelmasiak, Isabela; Villar, Adrià

    2013-01-01

    This report includes the process of designing an armadillo robot and the analysis preceding the choice of the topic. Finding the first ideas for this project required extensive analysis of different bionic related disciplines in nature. The final topic tur ned out to be basic research about making a robot with several armadillo features, such as rolling up like a ball and walking. Prior to start the designi...

  4. [Analogies and analogy research in technical biology and bionics].

    Science.gov (United States)

    Nachtigall, Werner

    2010-01-01

    The procedural approaches of Technical Biology and Bionics are characterized, and analogy research is identified as their common basis. The actual creative aspect in bionical research lies in recognizing and exploiting technically oriented analogies underlying a specific biological prototype to indicate a specific technical application.

  5. Bionic Design for Column of Gantry Machining Center to Improve the Static and Dynamic Performance

    OpenAIRE

    Shihao Liu; Wenhua Ye; Peihuang Lou; Weifang Chen; Jungui Huang; Lili Xiao

    2012-01-01

    In order to improve the machining accuracy of a gantry machining center, structural bionic design for column was conducted. Firstly, the bionic design method for stiffener plate structure was established based on distribution principles of gingko root system. The bionic design method was used to improve column structure of the gantry machining center, and three kinds of bionic columns were put forward. The finite element analysis on original and bionic columns indicates that the mass of the c...

  6. Bionic asymmetry: from amiiform fish to undulating robotic fins

    Institute of Scientific and Technical Information of China (English)

    HU TianJiang; SHEN LinCheng; LOW K.H.

    2009-01-01

    Similar to bionic non-smooth which has been successfully applied in anti-resistance and anti-adhesion, bionic asymmetry is also an inherent property of biological systems and is worth exploring for con-ceivable pragmatic applications. Therefore, bionic asymmetry for undulations is of main interest in this paper. We initially investigate bionic asymmetry with a case study of the undulating robotic fin, RoboGnilos, which evolved from the long dorsal fin of Gymnarchus niloticus in the amiiforrn mode. Since the performance of the pre-existing undulating fins is hardly satisfactory, we obtain bionic in-spirations of undulatory asymmetry through observations and measurements on the specimen of G. niloticus, to improve upon the performance. Consequently, the newly acquired innovation for bionic asymmetry is incorporated into the previously derived kinematics model, and also applied to the ex-perimental prototype. Both computational and experimental results verify that bionic asymmetric un-dulation generates better propulsion performance (in terms of linear velocity and efficiency) than the traditional symmetric modes with the same undulatory parameters.

  7. The Bionic Man: Future Super Human

    Directory of Open Access Journals (Sweden)

    M. S. Sachin

    2014-01-01

    Full Text Available When I hear the phrase “human implantable electronics,” I must confess that I feel a bit queasy. It conjures up a more extreme image of pervasive computing than is usually justified. However, my perspective is that of a relatively healthy person in his 40s, without any physical handicaps. If my hearing was impaired or my heartbeat arrhythmic, I might be keen to find a remedy and, at this time, an electronic implant would probably be the way to go. Putting my emotional reaction aside, when I think about the possibilities of implantable technology, it actually begins to sound pretty cool. Humans do some Work well, some machine do, Why can’t combine them both? The result is The Bionic parts this paper will focus on the developments in technology towards amputees or those that have limited use of their arms or legs. Computers have enabled prosthetics to extend beyond wooden legs and plastic motionless appendages. A brief history of prosthetics will be introduced as well as the development of today’s newest technology. As it requires ECE, CS (for artificial intelligence, Mech {&} other fields combine technology. Prosthesis is an artificial body part designed to act as a cosmetic or functional replacement for the real thing, which might have been amputated or damaged as the result of trauma, disease or congenital disorder. Prostheses aren’t new – there’s evidence that artificial limbs were in use at least as far back as the first century BC.’ A prosthetic leg may have a knee joint that locks when the wearer puts weight on it, but this can happen only when the leg is fully extended and not, for example, when it’s bent while climbing a flight of stairs. Bionic prostheses offer a solution to such problems. Self-contained power sources perform a similar function to muscle, while sensors will detect what the wearer is doing and cause the limb to react accordingly. In addition to building artificial limbs that behave like the real thing

  8. Tissue bionics: examples in biomimetic tissue engineering

    International Nuclear Information System (INIS)

    Many important lessons can be learnt from the study of biological form and the functional design of organisms as design criteria for the development of tissue engineering products. This merging of biomimetics and regenerative medicine is termed 'tissue bionics'. Clinically useful analogues can be generated by appropriating, modifying and mimicking structures from a diversity of natural biomatrices ranging from marine plankton shells to sea urchin spines. Methods in biomimetic materials chemistry can also be used to fabricate tissue engineering scaffolds with added functional utility that promise human tissues fit for the clinic

  9. The quest for the bionic arm.

    Science.gov (United States)

    Hutchinson, Douglas T

    2014-06-01

    The current state of research of upper extremity prosthetic devices is focused on creating a complete prosthesis with full motor and sensory function that will provide amputees with a near-normal human arm. Although advances are being made rapidly, many hurdles remain to be overcome before a functional, so-called bionic arm is a reality. Acquiring signals via nerve or muscle inputs will require either a reliable wireless device or direct wiring through an osseous-integrated implant. The best way to tap into the "knowledge" present in the peripheral nerve is yet to be determined.

  10. Tissue bionics: examples in biomimetic tissue engineering.

    Science.gov (United States)

    Green, David W

    2008-09-01

    Many important lessons can be learnt from the study of biological form and the functional design of organisms as design criteria for the development of tissue engineering products. This merging of biomimetics and regenerative medicine is termed 'tissue bionics'. Clinically useful analogues can be generated by appropriating, modifying and mimicking structures from a diversity of natural biomatrices ranging from marine plankton shells to sea urchin spines. Methods in biomimetic materials chemistry can also be used to fabricate tissue engineering scaffolds with added functional utility that promise human tissues fit for the clinic.

  11. Optical function of bionic nanostructure of ZnO

    International Nuclear Information System (INIS)

    A novel bionic network nanostructure of zinc oxide (ZnO), which is similar to the microstructure of a butterfly wing, was first fabricated by a vapor-phase transport method using zinc powder as a source. These bionic nanostructures are composed of three ordered multi-aperture gratings. Similar to the optical effect of butterfly wings, the diffraction patterns of the bionic network of ZnO were observed. The mechanism of the optical function was discussed based on the physical model of multi-aperture diffraction

  12. A Bionic Neural Network for Fish-Robot Locomotion

    Institute of Scientific and Technical Information of China (English)

    Dai-bing Zhang; De-wen Hu; Lin-cheng Shen; Hai-bin Xie

    2006-01-01

    A bionic neural network for fish-robot locomotion is presented. The bionic neural network inspired from fish neural network consists of one high level controller and one chain of central pattern generators (CPGs). Each CPG contains a nonlinear neural Zhang oscillator which shows properties similar to sine-cosine model. Simulation results show that the bionic neural network presents a good performance in controlling the fish-robot to execute various motions such as startup,stop,forward swimming,backward swimming,turn right and turn left.

  13. Bionic Concept Applied to Flow Slab Design of PEMFC

    Science.gov (United States)

    Wang, C. T.; Chang, C. P.

    A character of fuel cell with high potency and low pollution was known well and considered as a new generation of power technology. In this study a novel design of flow slab addressed and originated from bionic concept will be applied to improve the performance of PEMFC. Simulation results executed at Re = 100 show that the bionic flow type will possess a better uniformity of velocity and lower pressure drop. Besides, the integral performance concerned at SDR and PDR will also show the bionic flow type to be an outstanding design. Hence, this novel flow design addressed will be useful to promotion of PEMFC.

  14. Optical function of bionic nanostructure of ZnO

    Energy Technology Data Exchange (ETDEWEB)

    Xu, C X [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China); Zhu, G P [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China); Liu, Y J [School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, 639798 (Singapore); Sun, X W [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China); Li, X [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China); Liu, J P [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China); Cui, Y P [Advanced Photonics Center, School of Electronic Science and Engineering, Southeast University, Nanjing 210096 (China)

    2007-10-15

    A novel bionic network nanostructure of zinc oxide (ZnO), which is similar to the microstructure of a butterfly wing, was first fabricated by a vapor-phase transport method using zinc powder as a source. These bionic nanostructures are composed of three ordered multi-aperture gratings. Similar to the optical effect of butterfly wings, the diffraction patterns of the bionic network of ZnO were observed. The mechanism of the optical function was discussed based on the physical model of multi-aperture diffraction.

  15. Graphite Oxide to Graphene. Biomaterials to Bionics.

    Science.gov (United States)

    Thompson, Brianna C; Murray, Eoin; Wallace, Gordon G

    2015-12-01

    The advent of implantable biomaterials has revolutionized medical treatment, allowing the development of the fields of tissue engineering and medical bionic devices (e.g., cochlea implants to restore hearing, vagus nerve stimulators to control Parkinson's disease, and cardiac pace makers). Similarly, future materials developments are likely to continue to drive development in treatment of disease and disability, or even enhancing human potential. The material requirements for implantable devices are stringent. In all cases they must be nontoxic and provide appropriate mechanical integrity for the application at hand. In the case of scaffolds for tissue regeneration, biodegradability in an appropriate time frame may be required, and for medical bionics electronic conductivity is essential. The emergence of graphene and graphene-family composites has resulted in materials and structures highly relevant to the expansion of the biomaterials inventory available for implantable medical devices. The rich chemistries available are able to ensure properties uncovered in the nanodomain are conveyed into the world of macroscopic devices. Here, the inherent properties of graphene, along with how graphene or structures containing it interface with living cells and the effect of electrical stimulation on nerves and cells, are reviewed.

  16. Superhydrophobic bionic surfaces with hierarchical microsphere/SWCNT composite arrays.

    Science.gov (United States)

    Li, Yue; Huang, Xing Jiu; Heo, Sung Hwan; Li, Cun Cheng; Choi, Yang Kyu; Cai, Wei Ping; Cho, Sung Oh

    2007-02-13

    Superhydrophobic bionic surfaces with hierarchical micro/nano structures were synthesized by decorating single-walled or multiwalled carbon nanotubes (CNTs) on monolayer polystyrene colloidal crystals using a wet chemical self-assembly technique and subsequent surface treatment with a low surface-energy material of fluoroalkylsilane. The bionic surfaces are based on the regularly ordered colloidal crystals, and thus the surfaces have a uniform superhydrophobic property on the whole surface. Moreover, the wettability of the bionic surface can be well controlled by changing the distribution density of CNTs or the size of polystyrene microspheres. The morphologies of the synthesized bionic surfaces bear much resemblance to natural lotus leaves, and the wettability exhibited remarkable superhydrophobicity with a water contact angle of about 165 degrees and a sliding angle of 5 degrees.

  17. Resistance reduction by bionic coupling of the earthworm lubrication function

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Based on the biological coupling theory, the resistance reduction characteristic of the surface morphology and surface wettability of the earthworm were studied in this paper. The parameters of surface dorsal pore and corrugation were extracted. According to these parameters, the lubrication mechanism of the earthworm surface was analyzed. The distribution of the pores and surface morphology were designed and the bionic coupling samples were prepared. The positive pressure, lubricant flow rate and advancing velocity were selected as the experiment factors while the soil friction resistance as observed object. According to the obtained data of bionic coupling samples from the testing system of biologic signal for tiny soil adhesion test, the optimal samples from the bionic coupling resistance reduction tests were selected through the range analysis. Compared to the normal ones, the soil resistance of bionic coupling samples was reduced by 76.8%. This is of great significance and offers bright prospects for reducing energy loss in terrain mechanics.

  18. Acoustic performance analysis of bionic coupling multi-layer structure

    OpenAIRE

    Wang, Y. H.; Zhang, C. C.; Ren, L.Q.; Ichchou, Mohamed; Galland, Marie-Annick; Bareille, Olivier

    2014-01-01

    The interest of this paper lies in the proposition of using bionic method to develop a new sound absorption structure. Inspired by the coupling absorption structure of the skin and feather of a typical silent flying bird - owl, a bionic coupling multi-layer structure model is developed, which is composed of a micro-silt plate, porous fibrous material and a flexible micro-perforated membrane backed with airspace. The impedance transfer method is applied to calculate the absorption coefficients...

  19. Motor Driving Leg Design for Bionic Crab-like Robot

    Institute of Scientific and Technical Information of China (English)

    Wang; Li-quan; Qu; Xiao-rong; Meng; Qing-xin; Yuan; Peng; Wang; Mo-nan

    2002-01-01

    The paper presents the design of walking leg for bionics crab-like robot, which is driven with micro servo motor. The kinematic characteristics of the bionics machine are analysed for optimized structure parameters, which has been used in the robot design. A three closed loop motor control system structure for joint driver is also given, as well as the multi-joint driving system for walking robot leg.

  20. Bionics in Engineering Education Considerations, Experiences and Conclusions

    Directory of Open Access Journals (Sweden)

    Ralf Neurohr

    2008-01-01

    Full Text Available During recent years bionics, a new discipline which is in charge with the transfer of the principles of construction, regulation, interaction and organisation of biology into innovative technical solutions, has attracted significant interest from various industries. Based on this request for bionic expertise in engineering, the faculty for teaching engineering in foreign languages (FILS at ‘Politehnica’ University of Bucharest started a course in bionics in SS 2007, which was supported by the expertise of the German ‘Bionik-Kompetenz-Netz’, one of the leading organizations in bionics. This is the report on the considerations involved in the course concept, the first experiences with the students' acceptance, some conclusions and future perspectives for extending bionics activities at ‘Politehnica’. Finally, within the last section, the evaluation of a questionnaire, filled in by the students at the end of the course, will be presented. In order to avoid any confusion, considering overlapping or mixing up with other bio-disciplines related to technology, the paper starts with a short introduction, explaining the principles of bionics and providing a clear definition of the field.

  1. Bionic Research on Bird Feather for Drag Reduction

    Directory of Open Access Journals (Sweden)

    Beibei Feng

    2015-02-01

    Full Text Available To reduce friction drag with bionic method in a more feasible way, the surface microstructure of bird feather was analyzed attempting to reveal the biologic features responding to skin friction drag reduction. Then comparative bionic surface mimicking bird feather was fabricated through hot-rolling technology for drag reduction. The microriblet film was formed on a PVC substrate through a self-developed hot-rolling equipment. The bionic surface with micron-scale riblets formed spontaneously due to the elastic-plastic deformation of PVC in high temperature and high pressure environment. Comparative experiments between micro-structured bionic surface and smooth surface were performed in a wind tunnel to evaluate the effect of bionic surface on drag reduction, and significant drag reduction efficiency was obtained. Numerical simulation results show that microvortex induced in the solid-gas interface of bionic surface has the effect of shear stress reduction and the small level of an additional pressure drag resulting from pressure distribution deviation on bird feather like surface, hence reducing the skin friction drag significantly. Therefore, with remarkable drag reduction performance and simple fabrication technology, the proposed drag reduction technique shows the promise for practical applications.

  2. Bionic autonomic neuromodulation revolutionizes cardiology in the 21st century.

    Science.gov (United States)

    Sunagawa, Kenji

    2009-01-01

    In this invited session, we would like to address the impact of bionic neuromodulation on cardiovascular diseases. It has been well established that cardiovascular dysregulation plays major roles in the pathogenesis of cardiovascular diseases. This is the reason why most drugs currently used in cardiology have significant pharmacological effects on the cardiovascular regulatory system. Since the ultimate center for cardiovascular regulation is the brainstem, it is conceivable that autonomic neuromodulation would have significant impacts on cardiovascular diseases. On the basis of this framework, we first developed a bionic, neurally regulated artificial pacemaker. We then substituted the brainstem by CPU and developed a bionic artificial baroreflex system. We further developed a bionic brain that achieved better regulatory conditions than the native brainstem in order to improve survival in animal model with heart failure. We recently developed a bionic neuromodulation system to reduce infarction size following acute myocardial infarction. We believe that the bionic neuromodulation will inspire even more intricate applications in cardiology in the 21(st) century.

  3. Bionic Research on Fish Scales for Drag Reduction

    Institute of Scientific and Technical Information of China (English)

    Zhaoliang Dou; Jiadao Wang; Darong Chen

    2012-01-01

    To reduce friction drag with bionic method in a more feasible way,the surface microstructure of fish scales was analyzed attempting to reveal the biologic features responding to skin friction drag reduction.Then comparable bionic surface mimicking fish scales was fabricated through coating technology for drag reduction.The paint mixture was coated on a substrate through a self-developed spray-painting apparatus.The bionic surface with micron-scale caves formed spontaneously due to the interfacial convection and deformation driven by interfacial tension gradient in the presence of solvent evaporation.Comparative experiments between bionic surface and smooth surface were performed in a water tunnel to evaluate the effect of bionic surface on drag reduction,and visible drag reduction efficiency was obtained.Numerical simulation results show that gas phase develops in solid-liquid interface of bionic surface with the effect of surface topography and partially replaces the solid-liquid shear force with gas-liquid shear force,hence reducing the skin friction drag effectively.Therefore,with remarkable drag reduction performance and simple fabrication technology,the proposed drag reduction technique shows the promise for practical applications.

  4. Progress in the bionic study on anti-adhesion and resistance reduction of terrain machines

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The theoretical studies of bionics of machinery have great scientific significance, and the development of bionic machines has large practical values in the field of engineering and technology. Through the rigorous selection process of evolution, the survived living organisms have successfully developed outstanding abilities to adapt to their surroundings and to reproduce their offspring. In this review,we interpreted the fundamental principles of anti-adhesion and anti-resistance of soil animals by reviewing the current status in this research field and summarizing the work of the research group at Jilin University of China in the past decades. The principles and technologies used in morphology bionics,electric-osmosis bionics,flexibility bionics,configuration bionics and coupling bionics were examined.Finally,the applications of the engineering bionics and their extensive prospects were introduced.

  5. Progress in the bionic study on anti-adhesion and resistance reduction of terrain machines

    Institute of Scientific and Technical Information of China (English)

    REN LuQuan

    2009-01-01

    The theoretical studies of bionics of machinery have great scientific significance, and the development of bionic machines has large practical values in the field of engineering and technology. Through the rigorous selection process of evolution, the survived living organisms have successfully developed outstanding abilities to adapt to their surroundings and to reproduce their offspring. In this review, we interpreted the fundamental principles of anti-adhesion and anti-resistance of soil animals by reviewing the current status in this research field and summarizing the work of the research group at Jilin Uni-versity of China in the past decades. The principles and technologies used in morphology bionics, electric-osmosis bionics, flexibility bionics, configuration bionics and coupling bionics were examined. Finally, the applications of the engineering bionics and their extensive prospects were introduced.

  6. Bionic models for new sustainable energy technology

    Energy Technology Data Exchange (ETDEWEB)

    Tributsch, H. [Hahn-Meitner Inst., Dept. Solare Energetik, Berlin (Germany)

    2004-07-01

    Within the boundary conditions of an abundant, but diluted solar energy supply nature has successfully evolved sophisticated regenerative energy technologies, which are not yet familiar to human engineering tradition. Since until the middle of this century a substantial contribution of renewable energy to global energy consumption is required in order to limit environmental deterioration, bionic technologies may contribute to the development of commercially affordable technical options. Four biological energy technologies have been selected as examples to discuss the challenges, both in scientific and technological terms, as well as the material research aspects involved: photovoltaics based on irreversible kinetics, tensile water technology, solar powered protonic energy circuits, fuel cell catalysis based on abundant transition metals. (orig.)

  7. "Bionic Man" Showcases Medical Research | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... this page please turn JavaScript on. Feature: The Bionic Man Meet the Bionic Man Past Issues / Fall 2014 Table of Contents ... and medical imaging, visit www.nibib.nih.gov "Bionic Man" Showcases Medical Research The National Institute of ...

  8. A bionic eye actuated by ionic polymer-metal composite (IPMC) artificial muscle

    Science.gov (United States)

    Yu, Min; Li, Yuxiu; He, Qingsong; Song, Linlin; Dai, Zhendong

    2011-04-01

    This research was conducted with the aim of developing an energy-efficient, noiseless, movable bionic eye for use in bionic toys. This novel bionic eye is actuated by an ionic polymer-metal composite actuator. The overall size of the eye was 39 mm in length, 45 mm in width, and 45 mm in thickness. The experimental results revealed such a bionic eye design is feasible. This type of bionic eye is appropriate for use in toys and robots to increase their visual impact.

  9. Presenting Bionic: Broader Impacts and Outreach Network for Institutional Collaboration

    Science.gov (United States)

    Storm, K.

    2014-12-01

    Broader Impact plans are required of all NSF proposals. In 2011 the National Science Board, which oversees NSF, reconfirmed NSF's commitment to Broader Impacts in its task force report on the merit review system. At many institutions there are professionals that focus their work on supporting the Broader Impact work of researchers. This session will share the Broader Impacts and Outreach Network for Institutional Collaboration (BIONIC) plan to create a professional network of individuals and offices committed to planning and carrying out effective Broader Impact programming. BIONIC is an NSF Research Coordination Network that is recommended for funding through the Biology Directorate. In this session we will share the goals of BIONIC, and the progress to date in reaching those goals (of which one aspect is the curating of effective Broader Impact initiatives).

  10. [The design of bionic left ventricular auxiliary pump].

    Science.gov (United States)

    Jin, Henglin; Hu, Xiaobing; Du, Lei

    2015-01-01

    This paper reports a novel design of bionic left ventricular auxiliary pump, and the characteristic is that elastic diaphragm of pump driven by hydraulic, having smooth, reliable blood supply, can prevent blood clots, can use the flow sensor, pressure sensor detection showing the blood pressure and blood volume at the inlet and outlet of the pump. The pump can go with heart rate synchronization or asynchronous auxiliary by the R wave of human body's ECG. The design goal is realization of bionic throb. Through the animal experiment, the blood pressure waveforms are close to expectations, stable flow can stroke according to the set value, which prove that the pump can meet the requirement for heart disease patients for bionic left ventricular assistant.

  11. EDITORIAL: Special issue on medical bionics Special issue on medical bionics

    Science.gov (United States)

    Shepherd, Robert K.; D, Ph

    2009-12-01

    This special section of the Journal of Neural Engineering contains eight invited papers presented as part of the inaugural conference `Medical Bionics: A New Paradigm for Human Health' held in the beautiful seaside village of Lorne, Victoria, Australia from 16-19 November 2008. This meeting formed part of the Sir Mark Oliphant International Conference Series (www.oliphant.org.au) and was generously supported by the Department of Innovation, Industry, Science and Research of the Australian Government, the Australian Academy of Science and the Australian Academy of Technological Sciences and Engineering. This meeting was designed to bring experts from a variety of scientific, engineering and clinical disciplines together in a unique environment to discuss current progress in the field of medical bionics and to develop the concepts and techniques required to build the next generation of devices. The field is rapidly expanding, with new engineering solutions for neurological disorders being developed at an astonishing rate. Successful application of emerging engineering technologies into medical bionics devices requires a multidisciplinary research environment in order to deliver clinical solutions that are both safe and effective. Clinical success stories to date include spinal cord stimulators for the management of chronic neurological pain; auditory prostheses that allow the profoundly deaf to hear; and deep brain stimulation to negate movement disorders in Parkinson's disease. Other research programs currently undergoing clinical trials include devices that allow paraplegics to stand and even walk; brain-machine interfaces that provide quadriplegic patients with rudimentary control of a computer but may ultimately provide control of wheel chairs and artificial limbs; devices that detect and suppress epileptic seizures using brief trains of electrical stimulation; and retinal prostheses that will provide vision to the blind. The future for medical bionics is indeed

  12. The Bionic Anticipation of Natural Disasters

    Institute of Scientific and Technical Information of China (English)

    Helmut Tributsch

    2005-01-01

    After major natural disasters, such as the recent earthquake-tsunami event in South Asia, reports appear about the mysterious ability of animals to anticipate and to escape the impending danger. This is an opportunity to recall the long history of this phenomenon in the traditions of different civilizations, to evaluate Chinese efforts, 30 -40 years ago, to use this phenomenon for earthquake prediction, and to judge its state of acceptance in modern science. An effort is made to introduce this phenomenon as a research field of modern bionics. The timing is favorable since, increasingly, infrared thermal anomalies, monitored from satellite, suggesting litho-atmospheric processes, are found to precede earthquakes.They were unexpected by seismologists and are here suggested to essentially reflect the energy conversion patterns responsible for the signals monitored by animals. The aim is to learn from animals in the long term how natural disasters can better be anticipated, and how simple technical warning systems can be developed. Some challenges are analyzed. One is interpretation of the nature of energy release prior to the main earthquake disaster resulting in "macro-anomaly" precursors,another is better to understand the effect on animal senses. The role of non-linear cooperative phenomena including tsunamitype waves is emphasized.

  13. Fermentation based carbon nanotube multifunctional bionic composites

    Science.gov (United States)

    Valentini, Luca; Bon, Silvia Bittolo; Signetti, Stefano; Tripathi, Manoj; Iacob, Erica; Pugno, Nicola M.

    2016-06-01

    The exploitation of the processes used by microorganisms to digest nutrients for their growth can be a viable method for the formation of a wide range of so called biogenic materials that have unique properties that are not produced by abiotic processes. Here we produced living hybrid materials by giving to unicellular organisms the nutrient to grow. Based on bread fermentation, a bionic composite made of carbon nanotubes (CNTs) and a single-cell fungi, the Saccharomyces cerevisiae yeast extract, was prepared by fermentation of such microorganisms at room temperature. Scanning electron microscopy analysis suggests that the CNTs were internalized by the cell after fermentation bridging the cells. Tensile tests on dried composite films have been rationalized in terms of a CNT cell bridging mechanism where the strongly enhanced strength of the composite is governed by the adhesion energy between the bridging carbon nanotubes and the matrix. The addition of CNTs also significantly improved the electrical conductivity along with a higher photoconductive activity. The proposed process could lead to the development of more complex and interactive structures programmed to self-assemble into specific patterns, such as those on strain or light sensors that could sense damage or convert light stimulus in an electrical signal.

  14. Fermentation based carbon nanotube multifunctional bionic composites

    Science.gov (United States)

    Valentini, Luca; Bon, Silvia Bittolo; Signetti, Stefano; Tripathi, Manoj; Iacob, Erica; Pugno, Nicola M.

    2016-01-01

    The exploitation of the processes used by microorganisms to digest nutrients for their growth can be a viable method for the formation of a wide range of so called biogenic materials that have unique properties that are not produced by abiotic processes. Here we produced living hybrid materials by giving to unicellular organisms the nutrient to grow. Based on bread fermentation, a bionic composite made of carbon nanotubes (CNTs) and a single-cell fungi, the Saccharomyces cerevisiae yeast extract, was prepared by fermentation of such microorganisms at room temperature. Scanning electron microscopy analysis suggests that the CNTs were internalized by the cell after fermentation bridging the cells. Tensile tests on dried composite films have been rationalized in terms of a CNT cell bridging mechanism where the strongly enhanced strength of the composite is governed by the adhesion energy between the bridging carbon nanotubes and the matrix. The addition of CNTs also significantly improved the electrical conductivity along with a higher photoconductive activity. The proposed process could lead to the development of more complex and interactive structures programmed to self-assemble into specific patterns, such as those on strain or light sensors that could sense damage or convert light stimulus in an electrical signal. PMID:27279425

  15. Artificial neural interfaces for bionic cardiovascular treatments.

    Science.gov (United States)

    Kawada, Toru; Sugimachi, Masaru

    2009-01-01

    An artificial nerve, in the broad sense, may be conceptualized as a physical and logical interface system that reestablishes the information traffic between the central nervous system and peripheral organs. Studies on artificial nerves targeting the autonomic nervous system are in progress to explore new treatment strategies for several cardiovascular diseases. In this article, we will review our research targeting the autonomic nervous system to treat cardiovascular diseases. First, we identified the rule for decoding native sympathetic nerve activity into a heart rate using transfer function analysis, and established a framework for a neurally regulated cardiac pacemaker. Second, we designed a bionic baroreflex system to restore the baroreflex buffering function using electrical stimulation of the celiac ganglion in a rat model of orthostatic hypotension. Third, based on the hypothesis that autonomic imbalance aggravates chronic heart failure, we implanted a neural interface into the right vagal nerve and demonstrated that intermittent vagal stimulation significantly improved the survival rate in rats with chronic heart failure following myocardial infarction. Although several practical problems need to be resolved, such as those relating to the development of electrodes feasible for long-term nerve activity recording, studies of artificial neural interfaces with the autonomic nervous system have great possibilities in the field of cardiovascular treatment. We expect further development of artificial neural interfaces as novel strategies to cope with cardiovascular diseases resistant to conventional therapeutics.

  16. Structural Bionic Design for Digging Shovel of Cassava Harvester Considering Soil Mechanics

    Directory of Open Access Journals (Sweden)

    Shihao Liu

    2014-01-01

    Full Text Available In order to improve the working performance of cassava harvester, structural bionic design for its digging shovel was conducted. Taking the oriental mole cricket's paws as bionic prototype, a new structural bionic design method for digging shovel was established, which considers the morphology-configuration-function coupling bionic. A comprehensive performance comparison method was proposed, which is used to select the bionic design schemes. The proposed bionic design method was used to improve digging shovel structure of a digging-pulling style cassava harvester, and nine bionic-type digging shovels were obtained with considering the impact of soil mechanics. After conducting mechanical properties comparative analysis for bionic-type digging shovels, the bionic design rules were summed up, and the optimal design scheme of digging shovel was obtained through combining the proposed comprehensive performance comparison method with Analytic Hierarchy Process (AHP. Studies have shown that bionic design method not only can improve the overall mechanical properties of digging shovel, but also can help to improve the harvesting effect of cassava harvester, which provides a new idea for crops harvesting machinery's structural optimization design.

  17. Elastic Buckling of Bionic Cylindrical Shells Based on Bamboo

    Institute of Scientific and Technical Information of China (English)

    Jian-feng Ma; Wu-yi Chen; Ling Zhao; Da-hai Zhao

    2008-01-01

    High load-bearing efficiency is one of the advantages of biological structures after the evolution of billions of years.Biomimicking from nature may offer the potential for lightweight design. In the viewpoint of mechanics properties, the culm of bamboo comprises of two types of cells and the number of the vascular bundles takes a gradient of distribution. A three-point bending test was carried out to measure the elastic modulus. Results show that the elastic modulus of bamboo decreases gradually from the periphery towards the centre. Based on the structural characteristics of bamboo, a bionic cylindrical structure was designed to mimic the gradient distribution of vascular bundles and parenchyma cells. The buckling resistance of the bionic structure was compared with that of a traditional shell of equal mass under axial pressure by finite element simulations. Results show that the load-bearing capacity of bionic shell is increased by 124.8%. The buckling mode of bionic structure is global buckling while that of the conventional shell is local buckling.

  18. Design and Testing of a Bionic Dancing Prosthesis.

    Directory of Open Access Journals (Sweden)

    Elliott J Rouse

    Full Text Available Traditionally, prosthetic leg research has focused on improving mobility for activities of daily living. Artistic expression such as dance, however, is not a common research topic and consequently prosthetic technology for dance has been severely limited for the disabled. This work focuses on investigating the ankle joint kinetics and kinematics during a Latin-American dance to provide unique motor options for disabled individuals beyond those of daily living. The objective of this study was to develop a control system for a bionic ankle prosthesis that outperforms conventional prostheses when dancing the rumba. The biomechanics of the ankle joint of a non-amputee, professional dancer were acquired for the development of the bionic control system. Subsequently, a professional dancer who received a traumatic transtibial amputation in April 2013 tested the bionic dance prosthesis and a conventional, passive prosthesis for comparison. The ability to provide similar torque-angle behavior of the biological ankle was assessed to quantify the biological realism of the prostheses. The bionic dancing prosthesis overlapped with 37 ± 6% of the non-amputee ankle torque and ankle angle data, compared to 26 ± 2% for the conventional, passive prosthesis, a statistically greater overlap (p = 0.01. This study lays the foundation for quantifying unique, expressive activity modes currently unavailable to individuals with disabilities. Future work will focus on an expansion of the methods and types of dance investigated in this work.

  19. Design and Testing of a Bionic Dancing Prosthesis.

    Science.gov (United States)

    Rouse, Elliott J; Villagaray-Carski, Nathan C; Emerson, Robert W; Herr, Hugh M

    2015-01-01

    Traditionally, prosthetic leg research has focused on improving mobility for activities of daily living. Artistic expression such as dance, however, is not a common research topic and consequently prosthetic technology for dance has been severely limited for the disabled. This work focuses on investigating the ankle joint kinetics and kinematics during a Latin-American dance to provide unique motor options for disabled individuals beyond those of daily living. The objective of this study was to develop a control system for a bionic ankle prosthesis that outperforms conventional prostheses when dancing the rumba. The biomechanics of the ankle joint of a non-amputee, professional dancer were acquired for the development of the bionic control system. Subsequently, a professional dancer who received a traumatic transtibial amputation in April 2013 tested the bionic dance prosthesis and a conventional, passive prosthesis for comparison. The ability to provide similar torque-angle behavior of the biological ankle was assessed to quantify the biological realism of the prostheses. The bionic dancing prosthesis overlapped with 37 ± 6% of the non-amputee ankle torque and ankle angle data, compared to 26 ± 2% for the conventional, passive prosthesis, a statistically greater overlap (p = 0.01). This study lays the foundation for quantifying unique, expressive activity modes currently unavailable to individuals with disabilities. Future work will focus on an expansion of the methods and types of dance investigated in this work.

  20. Suzhou Institute of Nano-tech and Nano-bionics

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The Suzhou Institute of Nano-tech and Nano-bionics is co-established by CAS, the provincial government of Jiangsu, and the municipal government of Suzhou, a time-honored urban center and picturesque tourist resort in the Yangtze delta.

  1. On the resonance analysis for compliant bionic jellyfishes

    Institute of Scientific and Technical Information of China (English)

    HSIEH; Wen-Hsiang; CHEN; Tsung-I

    2010-01-01

    A bionic jellyfish is a robot that can mimic the swimming of a real jellyfish. In practical application, the volume and the capacity of its carrying power are limited, hence its power consumption is a crucial factor for continuous swimming. The purpose of this paper is to propose an approach for the resonance analysis of bionic jellyfishes in order to investigate their energy efficiency in swimming. First, a suitable rigid-body bionic jellyfish was chosen from the previous study, and then its design approach was presented, Then, it was transformed into a compliant design, by the proposed method, in order to mimic the motion of a real jellyfish. Furthermore, its solid model was drawn, and the approach of modal analysis by using ANSYS software was addressed. After that, two terms, specific energy and energy ratio, were defined in order to evaluate its energy efficiency. Finally, a design example was given for illustration, and its motion simulations with and without resonance input were conducted by using ADAMS software. Additionally, their specific energies and energy ratios were found. The simulation results showed that the required input energy would be significantly reduced if a bionic jellyfish swims at its resonance frequency.

  2. BIOCONAID System (Bionic Control of Acceleration Induced Dimming). Final Report.

    Science.gov (United States)

    Rogers, Dana B.; And Others

    The system described represents a new technique for enhancing the fidelity of flight simulators during high acceleration maneuvers. This technique forces the simulator pilot into active participation and energy expenditure similar to the aircraft pilot undergoing actual accelerations. The Bionic Control of Acceleration Induced Dimming (BIOCONAID)…

  3. Superhydrophobicity of Bionic Alumina Surfaces Fabricated by Hard Anodizing

    Institute of Scientific and Technical Information of China (English)

    Jing Li; Feng Du; Xianli Liu; Zhonghao Jiang; Luquan Ren

    2011-01-01

    Bionic alumina samples were fabricated on convex dome type aluminum alloy substrate using hard anodizing technique.The convex domes on the bionic sample were fabricated by compression molding under a compressive stress of 92.5 MPa.The water contact angles of the as-anodized bionic samples were measured using a contact angle meter (JC2000A) with the 3 μL water drop at room temperature.The measurement of the wetting property showed that the water contact angle of the unmodified as-anodized bionic alumina samples increases from 90° to 137° with the anodizing time.The increase in water contract angle with anodizing time arises from the gradual formation of hierarchical structure or composite structure.The structure is composed of the micro-scaled alumina columns and pores.The height of columns and the depth of pores depend on the anodizing time.The water contact angle increases significantly from 96° to 152° when the samples were modified with self-assembled monolayer of octadecanethiol (ODT),showing a change in the wettability from hydrophobicity to super-hydrophobicity.This improvement in the wetting property is attributed to the decrease in the surface energy caused by the chemical modification.

  4. Auto-bionics – a new paradigm in Regenerative Medicine and Surgery

    OpenAIRE

    Ashrafian, Hutan; Darzi, Ara; Athanasiou, Thanos

    2010-01-01

    The concept of bionics represents the development of engineering and technology based on natural biological systems. Traditional applications of bionics in healthcare include artificial bionic organs which can be used to replace, mimic and even enhance biological function when compared to native organic equivalents (so-called ‘Exo-bionics’). Recently there has been a new wave of bio-inspired treatments that act through the reorganisation of the existing biological organs in an individual to e...

  5. BIONICS APLIED IN PRODUCT DEVELOPMENT = A BIÔNICA APLICADA NO DESENVOLVIMENTO DE PRODUTOS

    OpenAIRE

    Wiliam Jeremias dos Santos

    2010-01-01

    In the recent years seems to be increasing the interest of engineers in the nature design concepts, it is because based biological systems and elements from nature we can find technological solutions to improve products and process. In summary, it is bionics. In this paper are presented bionics definition and concepts, its potential applications and finally, the methodology to apply bionics in the development of a product. = Nos últimos anos há evidências do aumento de interesse dos engenheir...

  6. Analysis of North American Newspaper Coverage of Bionics Using the Disability Studies Framework

    OpenAIRE

    Sonum Panesar; Gregor Wolbring

    2014-01-01

    Bionics are a set of technology products that are constantly evolving. Bionics are proposed as body add-ons or replacement for many body parts (ears, eyes, knees, neural prostheses, joints, muscles, kidney, liver, cartilage lungs, discs, pancreas, dental pulp, skin, hippocampus, legs and hands), and functions such as speech. Two main applications of bionic products are discussed; one being for the restoration of body abilities to a species-typical norm and the other being the addition of abi...

  7. Investigation of the Effect of Dimple Bionic Nonsmooth Surface on Tire Antihydroplaning

    OpenAIRE

    Haichao Zhou; Guolin Wang; Yangmin Ding; Jian Yang; Huihui Zhai

    2015-01-01

    Inspired by the idea that bionic nonsmooth surfaces (BNSS) reduce fluid adhesion and resistance, the effect of dimple bionic nonsmooth structure arranged in tire circumferential grooves surface on antihydroplaning performance was investigated by using Computational Fluid Dynamics (CFD). The physical model of the object (model of dimple bionic nonsmooth surface distribution, hydroplaning model) and SST k − ω turbulence model are established for numerical analysis of tire hydroplaning. By virtu...

  8. Gas-solid Erosion on Bionic Configuration Surface

    Institute of Scientific and Technical Information of China (English)

    HAN Zhiwu; ZHANG Junqiu; GE Chao; JIANG Jialian; REN Luquan

    2011-01-01

    A three levels orthogonal table- L9(34) was used, namely, impact angle, rotating speed, erodent size, and surface configuration were considered. The three bionic surface configurations are pit, groove, and ring. The experimental results indicate the experiment factors affecting erosive rate are, in their sequence of contribution, erodent size, impact angle, configuration, and rotating speed; the erosive rate increased with increase in rotating speed, erodent size; the erosion resistance of the sample with ring structure is higher than that of the other two samples. Based on this result, regression orthogonal experiment was carried out to select the optimal erosion resistance condition with respect to the ring bionic surface configuration. Regression equations between erosive rate and experimental factors of ring surface configurations were obtained.

  9. HYDRODYNAMIC ANALYSIS AND SIMULATION OF A SWIMMING BIONIC ROBOT TUNA

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A dynamic model for undulatory locomotion was proposed to study the swimming mechanism of a developed bionic robot tuna. On the basis of inviscid hydrodynamics and rigid-body dynamics, the momentum and propulsive force required for propelling the swimming robot tuna's flexible body was calculated. By solving the established dynamic equations and efficiency formula, the swimming velocity and propulsive efficiency of the bionic robot tuna were obtained. The relationship between the kinematic parameters of the robot tuna's body curve and the hydrodynamic performances was established and discussed after hydrodynamic simulations. The results presented in this article can be used to increase the swimming speed, propulsive thrust, and the efficiency of underwater vehicles effectively.

  10. Bionic optimization research of soil cultivating component design

    Institute of Scientific and Technical Information of China (English)

    GUO ZhiJun; ZHOU ZhiLi; ZHANG Yi; LI ZhongLi

    2009-01-01

    The basic biomechanical laws that apply to the clawed toes of animals with powerful digging abilities and the optimal bionic design of curved soil cultivating components with an analogous contour were researched in a novel way. First, the curvature and profile of the inside contour line of a field mouse's clawed toe were analyzed. The finite element method (FEM) was then used to simulate the working process in order to study the changing characteristics of the working resistance of bionic soil-engaging surfaces and the stress field of the processed soil. A straight-line cultivating component was used for comparative analysis. In accordance with the simulation results, a series of soil cultivating components of varying design were manufactured. An indoor soil bin experiment was carried out to measure their working resistance and validate the results of the FEM analysis. The results of this research would have important values in the optimization design of cultivating components for energy and cost savings.

  11. Bionic restorative system: its potential value in caries therapy.

    Science.gov (United States)

    He, M M Hao; Zheng, M M Ren; Lin, M D Yinghe

    2009-07-01

    Dental defect caused by dental caries is usually restored by fillings, inlays or onlays at the present day. Although the therapeutic effects of these methods have already been confirmed, complications occasionally set in, such as pulp injury, fracture and secondary caries. Bionic dental organic center possesses similar functions of the natural dental organic center. So we put forward a hypothesis that bionic organic center can be transplanted onto the conditioned pulpal walls of the prepared cavity and a specific filling material, which the cavity will be filled with, provides oxygen, nutrition and raw materials for it to regenerate the lost odontal tissue in vivo. The regenerated odontal tissue which has similar properties of the healthy odontal tissue will restore the defect and it will be combined with the residual odontal tissue tightly, not only in physical structure but also in function. Then the teeth suffering from dental caries could live and function like healthy ones.

  12. [Bionic model for coordinated head-eye motion control].

    Science.gov (United States)

    Mao, Xiaobo; Chen, Tiejun

    2011-10-01

    The relationships between eye movements and head movements of the primate during gaze shifts are analyzed in detail in the present paper. Applying the mechanisms of neurophysiology to engineering domain, we have improved the robot eye-head coordination. A bionic control strategy of coordinated head-eye motion was proposed. The processes of gaze shifts are composed of an initial fast phase followed by a slow phase. In the fast phase saccade eye movements and slow head movements were combined, which cooperate to bring gaze from an initial resting position toward the new target rapidly, while in the slow phase the gaze stability and target fixation were ensured by the action of the vestibulo-ocular reflex (VOR) where the eyes and head rotate by equal amplitudes in opposite directions. A bionic gaze control model was given. The simulation results confirmed the effectiveness of the model by comparing with the results of neurophysiology experiments.

  13. Development of Junction Elements from Study of the Bionics

    Institute of Scientific and Technical Information of China (English)

    Wilson Kindlein Junior; Luis Henrique Alves C(a)ndido; André Canal Marques; Sandra Souza dos Santos; Maurício da Silva Viegas

    2007-01-01

    The applications of bionic methodology developed by the Laboratory of Design and Material Selection as basis in the creation of junction elements were demonstrated.These elements favor the application of Ecodesign in reference to the effectiveness of product dismount aiming the reduction of ambient impact in all its phases of use.The creation,the development and the confection of new junction elements were described,and case studies of new products developed specificallv with this purpose were presented.

  14. Unifying inflation with late-time acceleration in BIonic system

    OpenAIRE

    Sepehri, Alireza; Rahaman, Farook; Setare, Mohammad Reza; Pradhan, Anirudh(Department of Mathematics, Institute of Applied Sciences & Humanities, GLA University, Mathura, U.P., 281 406, India); Capozziello, Salvatore; Sardar, Iftikar Hossain

    2015-01-01

    In this research, we propose a new model that allows to unify inflation, deceleration and acceleration phases of expansion history in BIonic system. In this model, in the beginning, there have been $k$ black fundamental strings that transited to the BIon configuration at a corresponding point. At this point, two universe brane and universe antibrane have been created, interacted with each other via one wormhole and inflated. With decreasing temperature, the energy of this wormhole flowed into...

  15. Bionic catalysis of porphyrin for electrochemical detection of nucleic acids

    International Nuclear Information System (INIS)

    Highlights: ► This is the first application of bionic catalysis of porphyrin as detection probe in bioanalysis. ► Porphyrin–DNA–gold nanoparticle probe is synthesized. ► Binding model between FeTMPyP and DNA is verified. ► The detection probe shows excellent electrocatalytic behaviors toward the reduction of O2. ► The biosensor exhibited good performance with wide linear range and high specificity. - Abstract: A novel electrochemical strategy was designed for the detection of DNA based on the bionic catalysis of porphyrin. The detection probe was prepared via the assembly of thiolated double strand DNA (dsDNA) with gold nanoparticles (AuNPs), and then interacted with cationic iron (III) meso-tetrakis (N-methylphyridinum-4-yl) porphyrin (FeTMPyP) via groove binding along the dsDNA surface. The resulting nanocomplex was characterized with transmission electron microscopy, UV–vis absorption and circular dichroism spectroscopy. The FeTMPyP–DNA–AuNPs probe on gold electrode demonstrated the excellent electrocatalytic behaviors toward the reduction of O2 due to the largely loading of FeTMPyP and good conductivity. Based on bionic catalysis of porphyrin for the reduction of O2, the resulting biosensor exhibited a good performance for the detection of DNA with a wide linear range from 1 × 10−12 to 1 × 10−8 mol L−1 and detection limit of 2.5 × 10−13 mol L−1 at the signal/noise of 3. More importantly, the biosensor presented excellent ability to discriminate the perfectly complementary target and the mismatched stand. This strategy could be conveniently extended for detection of other biomolecules. To the best of our knowledge, this is the first application of bionic catalysis of porphyrin as detection probe and opens new opportunities for sensitive detection of biorecognition events.

  16. Research on Tripod Gait of Bionic Hexapod Robot

    OpenAIRE

    Wei Jiang-shu; Qi Xiang-jun; LV Xiao-rong; LIU Ming-dan

    2013-01-01

    Based on the bionic theory and the analyzed of movement mechanism for six-legged insect, the principle of tripod gait movement for walking robot was analyzed in this paper, and basic parameters and the principle of relative movement theory on gait research were discussed. Then the hexapod walking robot was assembled by using the component of Fischertechnik. With the characters of simple connective structure, unique design, this robot can walk forward and backward and can avoid mini-barrier. T...

  17. Proposed Enhanced Object Recognition Approach for Accurate Bionic Eyes

    OpenAIRE

    Mohammad Shkoukani; Hesham Abusaimeh; Rawan Abu Lial; Mays Khawaldeh

    2012-01-01

    AI has played a huge role in image formation and recognition, but all built on the supervised and unsupervised learning algorithms the learning agents follow. Neural networks have also a role in bionic eyes integration but it is not discussed thoroughly in this paper. The chip to be implanted, which is a robotic device that applies methods developed in machine learning, consists of large scale algorithms for feature learning to construct classifiers for object detection and recognition, to in...

  18. Performance augmentation in hybrid bionic systems: techniques and experiment

    OpenAIRE

    Alicea, Bradly

    2008-01-01

    Recent developments in hybrid biological-technological systems (hybrid bionic systems) has made clear the need for evaluating ergonomic fit in such systems, especially as users first become adjusted to using such systems. This training is accompanied by physiological adaptation, and can be thought of computationally as a relative degree of matching between prosthetic devices, physiology, and behavior. Achieving performance augmentation involves two features of performance: a specific form of ...

  19. A Bionic Camera-Based Polarization Navigation Sensor

    OpenAIRE

    Daobin Wang; Huawei Liang; Hui Zhu; Shuai Zhang

    2014-01-01

    Navigation and positioning technology is closely related to our routine life activities, from travel to aerospace. Recently it has been found that Cataglyphis (a kind of desert ant) is able to detect the polarization direction of skylight and navigate according to this information. This paper presents a real-time bionic camera-based polarization navigation sensor. This sensor has two work modes: one is a single-point measurement mode and the other is a multi-point measurement mode. An indoor ...

  20. Sliding resistance of plates with bionic bumpy surface against soil

    Institute of Scientific and Technical Information of China (English)

    LI Jian-qiao; SUN Jiu-rong; REN Lu-quan; CHEN Bing-cong

    2004-01-01

    The non-smooth surface morphology of dung beetle, Copris ochus, was analyzed. The bulldozing plates with bionic geometric non-smooth or the chemical uneven surface were designed for the soil sliding test based on the simulation of the bumpy surface of the dung beetle. Special black metals-with different contents of alloys of manganese, silicon, chromium,copper and rare earth-were developed for making geometric non-smooth and chemical uneven surfaces by means of surface welding at the surfaces of a middle carbon steel plate. Four metals, with different surface properties including hardness and water contact angle were used to make the bulldozing plates for measuring the soil sliding resistance. Test results of soil sliding resistance indicate that all the geometric non-smooth plates and the chemical uneven plates reducing soil friction.Considering the materials and surface morphology, the bionic plate can reduce the soil sliding resistance from 18.1% up to 42.2%, compared to the traditional smooth bulldozing plate made from middle carbon steel. The test results also show that the smaller the normal load, the greater effect on resistance reduction by the bionic non-smooth surface plates.

  1. Erosion resistance of bionic functional surfaces inspired from desert scorpions.

    Science.gov (United States)

    Zhiwu, Han; Junqiu, Zhang; Chao, Ge; Li, Wen; Ren, Luquan

    2012-02-01

    In this paper, a bionic method is presented to improve the erosion resistance of machine components. Desert scorpion (Androctonus australis) is a typical animal living in sandy deserts, and may face erosive action of blowing sand at a high speed. Based on the idea of bionics and biologic experimental techniques, the mechanisms of the sand erosion resistance of desert scorpion were investigated. Results showed that the desert scorpions used special microtextures such as bumps and grooves to construct the functional surfaces to achieve the erosion resistance. In order to understand the erosion resistance mechanisms of such functional surfaces, the combination of computational and experimental research were carried out in this paper. The Computational Fluid Dynamics (CFD) method was applied to predict the erosion performance of the bionic functional surfaces. The result demonstrated that the microtextured surfaces exhibited better erosion resistance than the smooth surfaces. The further erosion tests indicated that the groove surfaces exhibited better erosion performance at 30° injection angle. In order to determine the effect of the groove dimensions on the erosion resistance, regression analysis of orthogonal multinomials was also performed under a certain erosion condition, and the regression equation between the erosion rate and groove distance, width, and height was established.

  2. Bionics by examples 250 scenarios from classical to modern times

    CERN Document Server

    Nachtigall, Werner

    2015-01-01

    Bionics means learning from the nature for the development of technology. The science of "bionics" itself is classified into several sections, from materials and structures over procedures and processes until evolution and optimization. Not all these areas, or only a few, are really known in the public and also in scientific literature. This includes the Lotus-effect, converted to the contamination-reduction of fassades and the shark-shed-effect, converted to the  resistance-reduction of airplanes. However, there are hundreds of highly interesting examples that contain the transformation of principles of the nature into technology. From the large number of these examples, 250 were selected for the present book according to "prehistory", "early-history", "classic" and "modern time". Most examples are new. Every example includes a printed page in a homogeneous arrangement. The examples from the field "modern time" are joint in blocks corresponding to the sub-disciplines of bionics.

  3. Nanobionics: the impact of nanotechnology on implantable medical bionic devices.

    Science.gov (United States)

    Wallace, G G; Higgins, M J; Moulton, S E; Wang, C

    2012-08-01

    The nexus of any bionic device can be found at the electrode-cellular interface. Overall efficiency is determined by our ability to transfer electronic information across that interface. The nanostructure imparted to electrodes plays a critical role in controlling the cascade of events that determines the composition and structure of that interface. With commonly used conductors: metals, carbon and organic conducting polymers, a number of approaches that promote control over structure in the nanodomain have emerged in recent years with subsequent studies revealing a critical dependency between nanostructure and cellular behaviour. As we continue to develop our understanding of how to create and characterise electromaterials in the nanodomain, this is expected to have a profound effect on the development of next generation bionic devices. In this review, we focus on advances in fabricating nanostructured electrodes that present new opportunities in the field of medical bionics. We also briefly evaluate the interactions of living cells with the nanostructured electromaterials, in addition to highlighting emerging tools used for nanofabrication and nanocharacterisation of the electrode-cellular interface.

  4. Effects of bionic non-smooth surface on reducing soil resistance to disc ploughing

    Institute of Scientific and Technical Information of China (English)

    CHIRENDE; Benard; SIMALENGA; Timothy; Emmanuel

    2010-01-01

    Past researches have shown that the non-smooth body surfaces of soil burrowing animals help to reduce soil resistance. In this research, this concept of bionic non-smooth surface was applied to disc ploughs and an experiment was conducted in an indoor soil bin to find out the effects of different bionic units on reducing soil resistance to disc ploughing. Horizontal force acting on the disc plough during soil deformation was measured using a 5 kN sensor. Convex and concave bionic units were used and the material used for making convex ones is ultra high molecular weight polyethylene (UHMWPE) which is hydrophobic. From the experiment results, higher or deeper bionic units always resulted in less soil resistance. Convex bionic units gave the highest resistance reduction reaching a maximum of 19% reduction (from 1715.36 N to 1383.65 N) compared to concave bi-onic units. Also, samples with a bionic unit density of 30% gave the highest resistance reduction compared to the other two, which were either plain or had 10% density. In conclusion, the concept of bionic non-smooth units can be applied to disc ploughs in order to reduce soil resistance.

  5. The Research on Friction Characteristics of Non Smooth Bionic Mesoscopic Surface

    Directory of Open Access Journals (Sweden)

    Su Chunjian

    2014-12-01

    Full Text Available The application of using friction to transmit power and prevent slippage is very widely used, many animals have very strong adhesion climbing ability, and it has important theoretical significance and wide application prospect to research and the prepare bionic surface to increase transmission friction using the bionic technology. In recent years, the research of foot structure of climbing animals shows that their surface morphology has both macro and micro scale features, and only study from the macro to the micro scale surface structure can be better elucidate the mechanism of increasing-friction of climbing animal. This paper will study bionic surface structure on mesoscopic scale from micron to millimeter level, research the influence of foot structure of climbing animal under mesoscopic scale on characteristics of increasing friction using bionic technology, prepare the bionic non-smooth surface of convex or concave using bionic manufacturing technology, establish the friction model of non-smooth surface, investigate the increasing-friction mechanism of the bionic surface morphology on mesoscopic scales, reveals the influence of surface morphology, layout, size and material properties on the friction characteristics, provide the design of bionic friction surface and calculation method of friction coefficient and provide reliable theoretical basis for engineering application.

  6. Analysis of North American Newspaper Coverage of Bionics Using the Disability Studies Framework

    Directory of Open Access Journals (Sweden)

    Sonum Panesar

    2014-02-01

    Full Text Available Bionics are a set of technology products that are constantly evolving. Bionics are proposed as body add-ons or replacement for many body parts (ears, eyes, knees, neural prostheses, joints, muscles, kidney, liver, cartilage lungs, discs, pancreas, dental pulp, skin, hippocampus, legs and hands, and functions such as speech. Two main applications of bionic products are discussed; one being for the restoration of body abilities to a species-typical norm and the other being the addition of abilities to the body that are not species-typical. Disabled people are one main group perceived to be in need of therapeutic interventions that use various bionic products. So far, therapeutic interventions are about restoration to the species-typical norm. However, therapeutic bionic products increasingly give the wearer beyond normal body abilities (therapeutic enhancements. Many so-called non-disabled people want the same enhanced body-abilities especially through non-invasive bionic products (e.g., non-invasive brain machine interfaces, exoskeletons. The media has the ability to shape public perceptions with numerous consequences. The purpose of this study was to provide quantitative and qualitative data on how bionic technologies and its users are portrayed in North American newspapers. Data was obtained from 1977 to 2013 from the Canadian Newsstand complete database which covers over 300 English language Canadian newspapers and two Canadian newspapers, one with national focus (The Globe and Mail and one with local focus (Calgary Herald, and from 1980–2013 from one American newspaper with national reach (The New York Times. The study found (a an almost always positive portrayal of bionics; (b coverage of bionics mostly within a medical framework; (c a predominantly stereotypical and negative portrayal of individuals with disabilities; and (d a hierarchy of worthiness between different assistive devices such as a reporting bias favoring artificial legs

  7. Investigation of the Effect of Dimple Bionic Nonsmooth Surface on Tire Antihydroplaning.

    Science.gov (United States)

    Zhou, Haichao; Wang, Guolin; Ding, Yangmin; Yang, Jian; Zhai, Huihui

    2015-01-01

    Inspired by the idea that bionic nonsmooth surfaces (BNSS) reduce fluid adhesion and resistance, the effect of dimple bionic nonsmooth structure arranged in tire circumferential grooves surface on antihydroplaning performance was investigated by using Computational Fluid Dynamics (CFD). The physical model of the object (model of dimple bionic nonsmooth surface distribution, hydroplaning model) and SST k - ω turbulence model are established for numerical analysis of tire hydroplaning. By virtue of the orthogonal table L16(4(5)), the parameters of dimple bionic nonsmooth structure design compared to the smooth structure were analyzed, and the priority level of the experimental factors as well as the best combination within the scope of the experiment was obtained. The simulation results show that dimple bionic nonsmooth structure can reduce water flow resistance by disturbing the eddy movement in boundary layers. Then, optimal type of dimple bionic nonsmooth structure is arranged on the bottom of tire circumferential grooves for hydroplaning performance analysis. The results show that the dimple bionic nonsmooth structure effectively decreases the tread hydrodynamic pressure when driving on water film and increases the tire hydroplaning velocity, thus improving tire antihydroplaning performance.

  8. Investigation of the Effect of Dimple Bionic Nonsmooth Surface on Tire Antihydroplaning

    Directory of Open Access Journals (Sweden)

    Haichao Zhou

    2015-01-01

    Full Text Available Inspired by the idea that bionic nonsmooth surfaces (BNSS reduce fluid adhesion and resistance, the effect of dimple bionic nonsmooth structure arranged in tire circumferential grooves surface on antihydroplaning performance was investigated by using Computational Fluid Dynamics (CFD. The physical model of the object (model of dimple bionic nonsmooth surface distribution, hydroplaning model and SST k-ω turbulence model are established for numerical analysis of tire hydroplaning. By virtue of the orthogonal table L16(45, the parameters of dimple bionic nonsmooth structure design compared to the smooth structure were analyzed, and the priority level of the experimental factors as well as the best combination within the scope of the experiment was obtained. The simulation results show that dimple bionic nonsmooth structure can reduce water flow resistance by disturbing the eddy movement in boundary layers. Then, optimal type of dimple bionic nonsmooth structure is arranged on the bottom of tire circumferential grooves for hydroplaning performance analysis. The results show that the dimple bionic nonsmooth structure effectively decreases the tread hydrodynamic pressure when driving on water film and increases the tire hydroplaning velocity, thus improving tire antihydroplaning performance.

  9. Particle Erosion Resistance of Bionic Samples Inspired from Skin Structure of Desert Lizard, Laudakin stoliczkana

    Institute of Scientific and Technical Information of China (English)

    He Huang; Yan Zhang; Luquan Ren

    2012-01-01

    In order to improve the particle erosion resistance of engineering surfaces,this paper proposed a bionic sample which is inspired from the skin structure of desert lizard,Laudakin stoliczkana.The bionic sample consists of a hard shell (aluminum) and a soft core (silicone rubber) which form a two-layer composite structure.The sand blast tests indicated that the bionic sample has better particle erosion resistance.In steady erosion period,the weight loss per unit time of the bionic sample is about 10% smaller than the contrast sample.The anti-erosion mechanism of the bionic sample was studied by single particle impact test.The results show that,after the impact,the kinetic energy of the particle is reduced by 56.5% on the bionic sample which is higher than that on the contrast sample (31.2%).That means the bionic sample can partly convert the kinetic energy of the particle into the deformation energy of the silicone rubber layer,thus the erosion is reduced.

  10. Bionic Humans Using EAP as Artificial Muscles Reality and Challenges

    Directory of Open Access Journals (Sweden)

    Yoseph Bar-Cohen

    2008-11-01

    Full Text Available For many years, the idea of a human with bionic muscles immediately conjures up science fiction images of a TV series superhuman character that was implanted with bionic muscles and portrayed with strength and speed far superior to any normal human. As fantastic as this idea may seem, recent developments in electroactive polymers (EAP may one day make such bionics possible. Polymers that exhibit large displacement in response to stimulation that is other than electrical signal were known for many years. Initially, EAP received relatively little attention due to their limited actuation capability. However, in the recent years, the view of the EAP materials has changed due to the introduction of effective new materials that significantly surpassed the capability of the widely used piezoelectric polymer, PVDF. As this technology continues to evolve, novel mechanisms that are biologically inspired are expected to emerge. EAP materials can potentially provide actuation with lifelike response and more flexible configurations. While further improvements in performance and robustness are still needed, there already have been several reported successes. In recognition of the need for cooperation in this multidisciplinary field, the author initiated and organized a series of international forums that are leading to a growing number of research and development projects and to great advances in the field. In 1999, he challenged the worldwide science and engineering community of EAP experts to develop a robotic arm that is actuated by artificial muscles to win a wrestling match against a human opponent. In this paper, the field of EAP as artificial muscles will be reviewed covering the state of the art, the challenges and the vision for the progress in future years.

  11. Organic, bionics & blob design - conceptual and methodological clarification

    DEFF Research Database (Denmark)

    Thomsen, Bente Dahl

    2015-01-01

    Industrial design is a young field of science that works together with many disciplines, borrows concepts and constructs metaphors for product characterization and phenomenon description. The meaning of the penetrative or constructed concepts is crystallized over time through academic writings...... and discussions. Organic, Bionics and Blob Design is an example of such a vague concept. Vague concepts create confusion when the concepts are used in academic texts and in course descriptions, which should be understandable across international research and by exchange students. This article discusses the Tripod...

  12. Laser Additive Manufacturing and Bionics: Redefining Lightweight Design

    Science.gov (United States)

    Emmelmann, C.; Sander, P.; Kranz, J.; Wycisk, E.

    New layer wise manufacturing technologies such as Laser Additive Manufacturing (LAM) allow innovative approaches to product design. Especially for lightweight design in aircraft applications LAM offers new possibilities for load-adapted structures. However, to fully capture lightweight potential of LAM technologies new design guidelines and processes have to be developed. A novel approach to extreme lightweight design is realized by incorporating structural optimization tools, bionic structures and LAM guidelines into one design process. By consequently following this design process designers can achieve lightweight savings in designing new aircraft structures.

  13. Emergence and Expansion of Cosmic Space in BIonic system

    OpenAIRE

    Sepehri, A.; Farook Rahaman; Anirudh Pradhan; Iftikar Hossain Sardar

    2014-01-01

    Recently, Padmanabhan [ arXiv:1206.4916 [hep-th] ] argued that the expansion rate of the universe can be thought of as the emergence of space as cosmic time progresses and is related to the difference between the surface degrees of freedom on the holographic horizon and the bulk degrees of freedom inside. The main question arises as to what is the origin of emergence of space in 4D universe. We answer this question in BIonic system. The BIon is a configuration in flat space of a D-brane and a...

  14. A Bionic Neural Link for peripheral nerve repair.

    Science.gov (United States)

    Xu, Yong Ping; Yen, Shih-Cheng; Ng, Kian Ann; Liu, Xu; Tan, Ter Chyan

    2012-01-01

    Peripheral nerve injuries with large gaps and long nerve regrowth paths are difficult to repair using existing surgical techniques, due to nerve degeneration and muscle atrophy. This paper proposes a Bionic Neural Link (BNL) as an alternative way for peripheral nerve repair. The concept of the BNL is described, along with the hypothetical benefits. A prototype monolithic single channel BNL has been developed, which consists of 16 neural recording channels and one stimulation channel, and is implemented in a 0.35-µm CMOS technology. The BNL has been tested in in-vivo animal experiments. Full function of the BNL chip has been demonstrated.

  15. Micromechanical resonator array for an implantable bionic ear.

    Science.gov (United States)

    Bachman, Mark; Zeng, Fan-Gang; Xu, Tao; Li, G-P

    2006-01-01

    In this paper we report on a multi-resonant transducer that may be used to replace a traditional speech processor in cochlear implant applications. The transducer, made from an array of micro-machined polymer resonators, is capable of passively splitting sound into its frequency sub-bands without the need for analog-to-digital conversion and subsequent digital processing. Since all bands are mechanically filtered in parallel, there is low latency in the output signals. The simplicity of the device, high channel capability, low power requirements, and small form factor (less than 1 cm) make it a good candidate for a completely implantable bionic ear device.

  16. Research on Tripod Gait of Bionic Hexapod Robot

    Directory of Open Access Journals (Sweden)

    Wei Jiang-shu

    2013-07-01

    Full Text Available Based on the bionic theory and the analyzed of movement mechanism for six-legged insect, the principle of tripod gait movement for walking robot was analyzed in this paper, and basic parameters and the principle of relative movement theory on gait research were discussed. Then the hexapod walking robot was assembled by using the component of Fischertechnik. With the characters of simple connective structure, unique design, this robot can walk forward and backward and can avoid mini-barrier. The experiment showed that this robot has good mobility and stability.  

  17. Noninvasive transcutaneous bionic baroreflex system prevents severe orthostatic hypotension in patients with spinal cord injury.

    Science.gov (United States)

    Yoshida, Masayoshi; Murayama, Yoshinori; Chishaki, Akiko; Sunagawa, Kenji

    2008-01-01

    Central baroreflex failure in patients with spinal cord injury results in serious orthostatic hypotension. We examined if transcutaneous electrical stimulation regulates arterial pressure in those patients. We identified skin regions capable of increasing arterial pressure and determined respective transfer function. Using the transfer function, we designed the feedback regulator (i.e., bionic baroreflex system) to control arterial pressure. Orthostatic stress decreased arterial pressure profoundly. Activation of bionic regulator restored and maintained arterial pressure at pre-specified levels. We conclude that the transcutaneous bionic system is noninvasive and capable of stabilizing arterial pressure in patients with spinal cord injury.

  18. Constructs of highly effective heat transport paths by bionic optimization

    Institute of Scientific and Technical Information of China (English)

    CHENG; Xinguang; (程新广); LI; Zhixin; (李志信); GUO; Zengyuan; (过增元)

    2003-01-01

    The optimization approach based on the biological evolution principle is used to construct the heat transport paths for volume-to-point problem. The transport paths are constructed by inserting high conductivity materials in the heat conduction domain where uniform or nonuniform heat sources exist. In the bionic optimization process, the optimal constructs of the high conductivity material are obtained by numerically simulating the evolution and degeneration process according to the uniformity principle of the temperature gradient. Finally, preserving the features of the optimal constructs, the constructs are regularized for the convenience of engineering manufacture. The results show that the construct obtained by bionic optimization is approximate to that obtained by the tree-network constructal theory when the heat conduction is enhanced for the domain with a uniform heat source and high conductivity ratio of the inserting material to the substrate, the high conductivity materials are mainly concentrated on the heat outlet for the case with a uniform heat source and low thermal conductivity ratio, and for the case with nonuniform heat sources, the high conductivity material is concentrated in the heat source regions and construacts several highly effective heat transport paths to connect the regions to the outlet.

  19. Numerical Simulation for Hydrodynamic Characteristics of A Bionic Flapping Hydrofoil

    Institute of Scientific and Technical Information of China (English)

    SU Yu-min; WANG Zhao-li; ZHANG Xi; GUO Bing-jie

    2012-01-01

    In order to study the propulsion mechanism of the bionic flapping hydrofoil (BFH),a 2-DoF (heave and pitch)motion model is formulated.The hydrodynamic performance of BFH with a series of kinematical parameters is explored via numerical simulation based on FLUENT.The calculated result is compared with the experimental value of MIT and that by the panel method.Moreover,the effect of inlet velocity,the angle of attack,the heave amplitude,the pitch amplitude,the phase difference,the heave biased angle,the pitch biased angle and the oscillating frequency are investigated.The study is useful for guiding the design of bionic underwater vehicle based on flapping propulsion.It is indicated that the optimal parameters combination is v =0.5 m/s,φ0 =40°,θ0 =30°,ψ =90°,φbias =0°,θbias =0°and f =0.5 Hz.

  20. Proposed Enhanced Object Recognition Approach for Accurate Bionic Eyes

    Directory of Open Access Journals (Sweden)

    Mohammad Shkoukani

    2012-07-01

    Full Text Available AI has played a huge role in image formation and recognition, but all built on the supervised and unsupervised learning algorithms the learning agents follow. Neural networks have also a role in bionic eyes integration but it is not discussed thoroughly in this paper. The chip to be implanted, which is a robotic device that applies methods developed in machine learning, consists of large scale algorithms for feature learning to construct classifiers for object detection and recognition, to input in the chip system. The challenge however is in identifying a complex image, which may require combined processes of learning features algorithms. In this paper an experimented approaches are stated for individual case of concentration of objects to obtain a high recognition outcome. Each approach may influence one angle, and a suggested non-experimented approach may give a better visual aid for bionic recognition and identification, using more learning and testing methods. The paper discusses the different approached of kernel and convolutional methods to classify objects, in addition to a proposed model to extract a maximized optimization of object formation and recognition. The proposed model combines variety of algorithms that have been experimented in differed related works and uses different learning approaches to handle large datasets in training.

  1. Bionic optimization research of soil cultivating component design

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The basic biomechanical laws that apply to the clawed toes of animals with powerful digging abilities and the optimal bionic design of curved soil cultivating components with an analogous contour were researched in a novel way. First, the curvature and profile of the inside contour line of a field mouse’s clawed toe were analyzed. The finite element method (FEM) was then used to simulate the working process in order to study the changing characteristics of the working resistance of bionic soil- engag- ing surfaces and the stress field of the processed soil. A straight-line cultivating component was used for comparative analysis. In accordance with the simulation results, a series of soil cultivating com- ponents of varying design were manufactured. An indoor soil bin experiment was carried out to meas- ure their working resistance and validate the results of the FEM analysis. The results of this research would have important values in the optimization design of cultivating components for energy and cost savings.

  2. Cell-bionics: tools for real-time sensor processing.

    Science.gov (United States)

    Toumazou, Chris; Cass, Tony

    2007-08-29

    The accurate monitoring of the physiological status of cells, tissues and whole organisms demands a new generation of devices capable of providing accurate data in real time with minimal perturbation of the system being measured. To deliver on the promise of cell-bionics advances over the past decade in miniaturization, analogue signal processing, low-power electronics, materials science and protein engineering need to be brought together. In this paper we summarize recent advances in our research that is moving us in this direction. Two areas in particular are highlighted: the exploitation of the physical properties inherent in semiconductor devices to perform very low power on chip signal processing and the use of gene technology to tailor proteins for sensor applications. In the context of engineered tissues, cell-bionics could offer the ability to monitor the precise physiological state of the construct, both during 'manufacture' and post-implantation. Monitoring during manufacture, particularly by embedded devices, would offer quality assurance of the materials components and the fabrication process. Post-implantation monitoring would reveal changes in the underlying physiology as a result of the tissue construct adapting to its new environment.

  3. Anaerobic digestion of corn stovers for methane production in a novel bionic reactor.

    Science.gov (United States)

    Zhang, Meixia; Zhang, Guangming; Zhang, Panyue; Fan, Shiyang; Jin, Shuguang; Wu, Dan; Fang, Wei

    2014-08-01

    To improve the biogas production from corn stovers, a new bionic reactor was designed and constructed. The bionic reactor simulated the rumen digestion of ruminants. The liquid was separated from corn stovers and refluxed into corn stovers again, which simulated the undigested particles separated from completely digested materials and fed back again for further degradation in ruminant stomach. Results showed that the bionic reactor was effective for anaerobic digestion of corn stovers. The liquid amount and its reflux showed an obvious positive correlation with biogas production. The highest biogas production rate was 21.6 ml/gVS-addedd, and the total cumulative biogas production was 256.5 ml/gVS-added. The methane content in biogas ranged from 52.2% to 63.3%. The degradation of corn stovers were greatly enhanced through simulating the animal digestion mechanisms in this bionic reactor. PMID:24923659

  4. Anaerobic digestion of corn stovers for methane production in a novel bionic reactor.

    Science.gov (United States)

    Zhang, Meixia; Zhang, Guangming; Zhang, Panyue; Fan, Shiyang; Jin, Shuguang; Wu, Dan; Fang, Wei

    2014-08-01

    To improve the biogas production from corn stovers, a new bionic reactor was designed and constructed. The bionic reactor simulated the rumen digestion of ruminants. The liquid was separated from corn stovers and refluxed into corn stovers again, which simulated the undigested particles separated from completely digested materials and fed back again for further degradation in ruminant stomach. Results showed that the bionic reactor was effective for anaerobic digestion of corn stovers. The liquid amount and its reflux showed an obvious positive correlation with biogas production. The highest biogas production rate was 21.6 ml/gVS-addedd, and the total cumulative biogas production was 256.5 ml/gVS-added. The methane content in biogas ranged from 52.2% to 63.3%. The degradation of corn stovers were greatly enhanced through simulating the animal digestion mechanisms in this bionic reactor.

  5. Architectural solutions in terms of Bionic urban environment of Olympic Sochi

    Directory of Open Access Journals (Sweden)

    Olga V. Kiba

    2010-10-01

    Full Text Available The principle of architectural bionics, suitable for Olympic Sochi environment was used for promenade designing. The complex solution includes promenade areas and a ‘winter and summer’ platform.

  6. Computational and experimental study on dynamic behavior of underwater robots propelled by bionic undulating fins

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Bionic undulating fins, inspired by undulations of the median and/or paired fin (MPF) fish, have a bright prospective for un-derwater missions with higher maneuverability, lower noisy, and higher efficiency. In the present study, a coupled computa-tional fluid dynamics (CFD) model was proposed and implemented to facilitate numerical simulations on hydrodynamic ef-fects of the bionic undulating robots. Hydrodynamic behaviors of underwater robots propelled by two bionic undulating fins were computationally and experimentally studied within the three typical desired movement patterns, i.e., marching, yawing and yawing-while-marching. Moreover, several specific phenomena in the bionic undulation mode were unveiled and dis-cussed by comparison between the CFD and experimental results under the same kinematics parameter sets. The contributed work on the dynamic behavior of the undulating robots is of importance for study on the propulsion mechanism and control algorithms.

  7. Simulated effect on the compressive and shear mechanical properties of bionic integrated honeycomb plates.

    Science.gov (United States)

    He, Chenglin; Chen, Jinxiang; Wu, Zhishen; Xie, Juan; Zu, Qiao; Lu, Yun

    2015-05-01

    Honeycomb plates can be applied in many fields, including furniture manufacturing, mechanical engineering, civil engineering, transportation and aerospace. In the present study, we discuss the simulated effect on the mechanical properties of bionic integrated honeycomb plates by investigating the compressive and shear failure modes and the mechanical properties of trabeculae reinforced by long or short fibers. The results indicate that the simulated effect represents approximately 80% and 70% of the compressive and shear strengths, respectively. Compared with existing bionic samples, the mass-specific strength was significantly improved. Therefore, this integrated honeycomb technology remains the most effective method for the trial manufacturing of bionic integrated honeycomb plates. The simulated effect of the compressive rigidity is approximately 85%. The short-fiber trabeculae have an advantage over the long-fiber trabeculae in terms of shear rigidity, which provides new evidence for the application of integrated bionic honeycomb plates.

  8. Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units

    OpenAIRE

    Zheng Ma; Yaoming Li; Lizhang Xu

    2015-01-01

    Background. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that bionic nonsmooth surface cleaning screens restrain the adhesion of rape materials, but the underlying mechanisms remain unclear. Objective. The reciprocating friction between rape stalk and bionic n...

  9. The Research on Friction Characteristics of Non Smooth Bionic Mesoscopic Surface

    OpenAIRE

    Su Chunjian; Li Ning; Xiao Linjing

    2014-01-01

    The application of using friction to transmit power and prevent slippage is very widely used, many animals have very strong adhesion climbing ability, and it has important theoretical significance and wide application prospect to research and the prepare bionic surface to increase transmission friction using the bionic technology. In recent years, the research of foot structure of climbing animals shows that their surface morphology has both macro and micro scale features, and only study from...

  10. Design and Implementation of a Bionic Mimosa Robot with Delicate Leaf Swing Behavior

    OpenAIRE

    Chung-Liang Chang; Jin-Long Shie

    2014-01-01

    This study designed and developed a bionic mimosa robot with delicate leaf swing behaviors. For different swing behaviors, this study developed a variety of situations, in which the bionic mimosa robot would display different postures. The core technologies used were Shape Memory Alloys (SMAs), plastic material, and an intelligent control device. The technology particularly focused on the SMAs memory processing bend mode, directional guidance, and the position of SMAs installed inside the pla...

  11. A Numerical Study of Aerodynamic Performance and Noise of a Bionic Airfoil Based on Owl Wing

    OpenAIRE

    Xiaomin Liu; Xiang Liu

    2014-01-01

    Noise reduction and efficiency enhancement are the two important directions in the development of the multiblade centrifugal fan. In this study, we attempt to develop a bionic airfoil based on the owl wing and investigate its aerodynamic performance and noise-reduction mechanism at the relatively low Reynolds number. Firstly, according to the geometric characteristics of the owl wing, a bionic airfoil is constructed as the object of study at Reynolds number of 12,300. Secondly, the large eddy...

  12. The design of an asymmetric bionic branching channel for electronic chips cooling

    Science.gov (United States)

    Xu, Shanglong; Qin, Jie; Guo, Wei; Fang, Kuang

    2013-06-01

    Inspired by the wing vein of Lepidoptera, a designment of asymmetric bionic branching channel for electronic chips cooling is developed. Lepidoptera vein D was chosen to measure the angle of first and second branch level. Based on these regular patterns, an asymmetric bionic branching channel is designed in a 35 mm × 35 mm chip. Comparing with fractal-like branching channel, it provides a stronger heat transfer capability, lower pressure drop and lower flow resistance in the experiment.

  13. Blood Glucose Control in Type 1 Diabetes With a Bihormonal Bionic Endocrine Pancreas

    OpenAIRE

    Russell, Steven J.; El-Khatib, Firas H.; Nathan, David M.; Magyar, Kendra L.; Jiang, John; Damiano, Edward R.

    2012-01-01

    OBJECTIVE To test whether safe and effective glycemic control could be achieved in type 1 diabetes using a bihormonal bionic endocrine pancreas driven by a continuous glucose monitor in experiments lasting more than two days and including six high-carbohydrate meals and exercise as challenges to glycemic control. RESEARCH DESIGN AND METHODS Six subjects with type 1 diabetes and no endogenous insulin secretion participated in two 51-h experiments. Blood glucose was managed with a bionic endocr...

  14. Multiadaptive Bionic Wavelet Transform: Application to ECG Denoising and Baseline Wandering Reduction

    OpenAIRE

    Sayadi Omid; Shamsollahi Mohammad B

    2007-01-01

    We present a new modified wavelet transform, called the multiadaptive bionic wavelet transform (MABWT), that can be applied to ECG signals in order to remove noise from them under a wide range of variations for noise. By using the definition of bionic wavelet transform and adaptively determining both the center frequency of each scale together with the -function, the problem of desired signal decomposition is solved. Applying a new proposed thresholding rule works successfully in denoising t...

  15. The fluid control mechanism of bionic structural heterogeneous composite materials and its potential application in enhancing pump efficiency

    Directory of Open Access Journals (Sweden)

    Limei Tian

    2015-11-01

    Full Text Available Studies have shown that the structure of dolphin skin controls fluid media dynamically. Gaining inspiration from this phenomenon, a kind of bionic structural heterogeneous composite material was designed. The bionic structural heterogeneous composite material is composed of two materials: a rigid metal base layer with bionic structures and an elastic polymer surface layer with the corresponding mirror structures. The fluid control mechanism of the bionic structural heterogeneous composite material was investigated using a fluid–solid interaction method in ANSYS Workbench. The results indicated that the bionic structural heterogeneous composite material’s fluid control mechanism is its elastic deformation, which is caused by the coupling action between the elastic surface material and the bionic structure. This deformation can decrease the velocity gradient of the fluid boundary layer through changing the fluid–solid actual contact surface and reduce the frictional force. The bionic structural heterogeneous composite material can also absorb some energy through elastic deformation and avoid energy loss. The bionic structural heterogeneous composite material was applied to the impeller of a centrifugal pump in a contrast experiment, increasing the pump efficiency by 5% without changing the hydraulic model of the impeller. The development of this bionic structural heterogeneous composite material will be straightforward from an engineering point of view, and it will have valuable practical applications.

  16. Effect of electrical pulse treatment on the thermal fatigue resistance of bionic compacted graphite cast iron processed in water

    International Nuclear Information System (INIS)

    Highlights: ► Electrical pulse treatment can reduce cracks on bionic units before thermal fatigue tests. ► Electrical pulse treatment can reduce crack sources during thermal fatigue tests. ► Thermal fatigue resistance of bionic units processed in water is enhanced. ► Thermal fatigue resistance of bionic CGI processed in water is improved. -- Abstract: In order to further enhance the thermal fatigue resistance of bionic compacted graphite cast iron (CGI) which is processed by laser in water, the electrical pulse treatment is applied to improve the thermal fatigue resistance of bionic units. The results show that the electrical pulse treatment causes the supersaturated carbon atoms located in the lattice of austenite to react with the iron atoms to form the Fe3C. The microstructures of the bionic units processed in water are refined by the electrical pulse treatment. The cracks on the bionic units are reduced by the electrical pulse treatment before the thermal fatigue tests; and during the tests, the thermal fatigue resistance of bionic units is therefore enhanced by reducing the crack sources. By this way, the thermal fatigue resistance of bionic CGI processed in water is improved.

  17. Emergence and expansion of cosmic space in BIonic system

    International Nuclear Information System (INIS)

    Recently, Padmanabhan [ (arXiv:1206.4916 [hep-th])] argued that the expansion rate of the universe can be thought of as the emergence of space as cosmic time progresses and is related to the difference between the surface degrees of freedom on the holographic horizon and the bulk degrees of freedom inside. The main question arises as to what is the origin of emergence of space in 4D universe. We answer this question in BIonic system. The BIon is a configuration in flat space of a D-brane and a parallel anti-D-brane connected by a thin shell wormhole with F-string charge. We propose a new model that allows that all degrees of freedom inside and outside the universe are controlled by the evolutions of BIon in extra dimension and tend to degrees of freedom of black F-string in string theory or black M2-brane in M-theory

  18. Engineering analyzes of bionics structures of componible modules

    International Nuclear Information System (INIS)

    The main goal of the research presented in this paper is creation of innovative concept for prefabricated houses for living, using the modular principal. The leading idea is assembling of prefabricated houses as structures of modules, with possibility for relatively easy changes during the exploitation: adding, removing or recombination of modules according to the space requirements of the users. Each of the modules would be fabricated as a fully prepared self standing room for living. The shape and construction of the modules, as well as their space arrangement are derived according to the principals of bionics. The quality of the presented concept is approved trough several analyses: static analysis of the construction using finite elements method; solar analysis for election of perfect orientation and insulation; thermal analysis. (Author)

  19. Ego-motion based on EM for bionic navigation

    Science.gov (United States)

    Yue, Xiaofeng; Wang, L. J.; Liu, J. G.

    2015-12-01

    Researches have proved that flying insects such as bees can achieve efficient and robust flight control, and biologists have explored some biomimetic principles regarding how they control flight. Based on those basic studies and principles acquired from the flying insects, this paper proposes a different solution of recovering ego-motion for low level navigation. Firstly, a new type of entropy flow is provided to calculate the motion parameters. Secondly, EKF, which has been used for navigation for some years to correct accumulated error, and estimation-Maximization, which is always used to estimate parameters, are put together to determine the ego-motion estimation of aerial vehicles. Numerical simulation on MATLAB has proved that this navigation system provides more accurate position and smaller mean absolute error than pure optical flow navigation. This paper has done pioneering work in bionic mechanism to space navigation.

  20. Bionic intraocular lens with variable focus and integrated structure

    Science.gov (United States)

    Liang, Dan; Wang, Xuan-Yin; Du, Jia-Wei; Xiang, Ke

    2015-10-01

    This paper proposes a bionic accommodating intraocular lens (IOL) for ophthalmic surgery. The designed lens has a solid-liquid mixed integrated structure, which mainly consists of a support ring, elastic membrane, rigid lens, and optical liquid. The lens focus can be adjusted through the deformation of the lens front surface when compressed. The integrated structure of the IOL is presented, as well as a detailed description of the lens materials and fabrication process. Images under different radial pressures are captured, and the lens deformation process, accommodating range, density, and optical property are analyzed. The designed lens achieves a 14.6 D accommodating range under a radial pressure of 51.4 mN and a 0.24 mm alteration of the lens outer radius. The deformation property of the lens matches well with the characteristic of the eye and shows the potential to help patients fully recover their vision accommodation ability after the cataract surgery.

  1. Porous structures of natural materials and bionic design

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    This investigation and morphology analysis of porous structure of some kinds of natural materials such as chicken eggshell, partridge eggshell, pig bone, and seeds of mung bean, soja, ginkgo, lotus seed, as well as the epidermis of apples, with SEM (Scanning Electronic Microscope) showed that natural structures' pores can be classified into uniform pores, gradient pores and multi pores from the viewpoint of the distribution variation of pore density, size and geometry. Furthermore, an optimal design of porous bearings was for the first time developed based on the gradient configuration of natural materials. The bionic design of porous structures is predicted to be widely developed and applied in the fields of materials and mechanical engineering in the future.

  2. Medicalization: current concept and future directions in a bionic society.

    Science.gov (United States)

    Maturo, Antonio

    2012-01-01

    The article illustrates the main features of the concept of medicalization, starting from its theoretical roots. Although it is the process of extending the medical gaze on human conditions, it appears that medicalization cannot be strictly connected to medical imperialism anymore. Other "engines" of medicalization are influential: consumers, biotechnology and managed care. The growth of research and theoretical reflections on medicalization has led to the proposal of other parallel concepts like pharmaceuticalization, genetization and biomedicalization. These new theoretical tools could be useful in the analysis of human enhancement. Human enhancement can be considered as the use of biomedical technology to improve performance on a human being who is not in need of a cure: a practice that is increasingly spreading in what might be defined as a "bionic society". PMID:22654387

  3. Unifying inflation with late-time acceleration in BIonic system

    CERN Document Server

    Sepehri, Alireza; Setare, Mohammad Reza; Pradhan, Anirudh; Capozziello, Salvatore; Sardar, Iftikar Hossain

    2015-01-01

    In this research, we propose a new model that allows to unify inflation, deceleration and acceleration phases of expansion history in BIonic system. In this model, in the beginning, there have been $k$ black fundamental strings that transited to the BIon configuration at a corresponding point. At this point, two universe brane and universe antibrane have been created, interacted with each other via one wormhole and inflated. With decreasing temperature, the energy of this wormhole flowed into universe branes and lead to inflation. After a short time, wormhole died, inflation ended and deceleration epoch started. With approaching two universe brane and antibrane together, tachyon was born, grew and caused creation of one new wormhole. At this time, two universe brane and antibrane connected again and late-time acceleration era of the universe began. We compare our model with previous unified phantom model and observational data and obtain some cosmological parameters like temperature in terms of time. We also ...

  4. Emergence and expansion of cosmic space in BIonic system

    Energy Technology Data Exchange (ETDEWEB)

    Sepehri, A., E-mail: alireza.sepehri@uk.ac.ir [Faculty of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman (Iran, Islamic Republic of); Rahaman, Farook, E-mail: rahaman@iucaa.ernet.in [Department of Mathematics, Jadavpur University, Kolkata 700032, West Bengal (India); Pradhan, Anirudh, E-mail: pradhan@iucaa.ernet.in [Department of Mathematics, GLA University, Mathura-281 406, U.P. (India); Sardar, Iftikar Hossain, E-mail: iftikar.spm@gmail.com [Department of Mathematics, Jadavpur University, Kolkata 700032, West Bengal (India)

    2015-02-04

    Recently, Padmanabhan [ (arXiv:1206.4916 [hep-th])] argued that the expansion rate of the universe can be thought of as the emergence of space as cosmic time progresses and is related to the difference between the surface degrees of freedom on the holographic horizon and the bulk degrees of freedom inside. The main question arises as to what is the origin of emergence of space in 4D universe. We answer this question in BIonic system. The BIon is a configuration in flat space of a D-brane and a parallel anti-D-brane connected by a thin shell wormhole with F-string charge. We propose a new model that allows that all degrees of freedom inside and outside the universe are controlled by the evolutions of BIon in extra dimension and tend to degrees of freedom of black F-string in string theory or black M2-brane in M-theory.

  5. Medicalization: Current concept and future directions in a Bionic Society

    Directory of Open Access Journals (Sweden)

    Antonio Maturo

    2012-01-01

    Full Text Available The article illustrates the main features of the concept of medicalization, starting from its theoretical roots. Although it is the process of extending the medical gaze on human conditions, it appears that medicalization cannot be strictly connected to medical imperialism anymore. Other "engines" of medicalization are influential: consumers, biotechnology and managed care. The growth of research and theoretical reflections on medicalization has led to the proposal of other parallel concepts like pharmaceuticalization, genetization and biomedicalization. These new theoretical tools could be useful in the analysis of human enhancement. Human enhancement can be considered as the use of biomedical technology to improve performance on a human being who is not in need of a cure: a practice that is increasingly spreading in what might be defined as a "bionic society".

  6. Emergence and Expansion of Cosmic Space in BIonic system

    CERN Document Server

    Sepehri, A; Pradhan, Anirudh; Sardar, Iftikar Hossain

    2015-01-01

    Recently, Padmanabhan [arXiv:1206.4916] argued that the expansion rate of the universe can be thought of as the emergence of space as cosmic time progresses and is related to the difference between the surface degrees of freedom on the holographic horizon and the bulk degrees of freedom inside. The main question arises as to what is origin of emergence of space in 4D universe? We answer to this question in BIonic system. The BIon is a configuration in flat space of a D-brane and a parallel anti-D-brane connected by a thin shell wormhole with F-string charge. We propose a new model that allows all degrees of freedom inside and outside the universe are controlled by the evolutions of BIon in extra dimension and tend to degrees of freedom of black F-string in string theory or black M2-brane in M theory.

  7. BIONic WalkAide for correcting foot drop.

    Science.gov (United States)

    Weber, Douglas J; Stein, Richard B; Chan, K Ming; Loeb, Gerald; Richmond, Frances; Rolf, Robert; James, Kelly; Chong, Su Ling

    2005-06-01

    The goal of this study was to test the feasibility and efficacy of using microstimulators (BIONs) to correct foot drop, the first human application of BIONs in functional electrical stimulation (FES). A prototype BIONic foot drop stimulator was developed by modifying a WalkAide2 stimulator to control BION stimulation of the ankle dorsiflexor muscles. BION stimulation was compared with surface stimulation of the common peroneal nerve provided by a normal WalkAide2 foot drop stimulator. Compared to surface stimulation, we found that BION stimulation of the deep peroneal nerve produces a more balanced ankle flexion movement without everting the foot. A three-dimensional motion analysis was performed to measure the ankle and foot kinematics with and without stimulation. Without stimulation, the toe on the affected leg drags across the ground. The BIONic WalkAide elevates the foot such that the toe clears the ground by 3 cm, which is equivalent to the toe clearance in the unaffected leg. The physiological cost index (PCI) was used to measure effort during walking. The PCI is high without stimulation (2.29 +/- 0.37; mean +/- S.D.) and greatly reduced with surface (1.29 +/- 0.10) and BION stimulation (1.46 +/- 0.24). Also, walking speed is increased from 9.4 +/- 0.4 m/min without stimulation to 19.6 +/- 2.0 m/min with surface and 17.8 +/- 0.7 m/min with BION stimulation. We conclude that functional electrical stimulation with BIONs is a practical alternative to surface stimulation and provides more selective control of muscle activation.

  8. [Design and Preparation of Plant Bionic Materials Based on Optical and Infrared Features Simulation].

    Science.gov (United States)

    Jiang, Xiao-jun; Lu, Xu-liang; Pan, Jia-liang; Zhang, Shuan-qin

    2015-07-01

    Due to the life characteristics such as physiological structure and transpiration, plants have unique optical and infrared features. In the optical band, because of the common effects of chlorophyll and water, plant leafs show spectral reflectance characteristics change in 550, 680, 1400 and 1900 nm significantly. In the infrared wave band, driven by transpiration, plants could regulate temperature on their own initiative, which make the infrared characteristics of plants different from artificial materials. So palnt bionic materials were proposed to simulate optical and infrared characteristics of plants. By analyzing formation mechanism of optical and infrared features about green plants, the component design and heat-transfer process of plants bionic materials were studied, above these the heat-transfer control formulation was established. Based on water adsorption/release compound, optical pigments and other man-made materials, plant bionic materials preparation methods were designed which could simulate the optical and infrared features of green plants. By chemical casting methods plant bionic material films were prepared, which use polyvinyl alcohol as film forming and water adsorption/release compound, and use optical pigments like chrome green and macromolecule yellow as colouring materials. The research conclusions achieved by testings figured out: water adsorption/release testing showed that the plant bionic materials with a certain thickness could absorb 1.3 kg water per square meter, which could satisfy the water usage of transpiration simulation one day; the optical and infrared simulated effect tests indicated that the plant bionic materials could preferably simulate the spectral reflective performance of green plants in optical wave band (380-2500 nm, expecially in 1400 and 1900 nm which were water absorption wave band of plants), and also it had similar daily infrared radiation variations with green plants, daily average radiation temperature

  9. [Design and Preparation of Plant Bionic Materials Based on Optical and Infrared Features Simulation].

    Science.gov (United States)

    Jiang, Xiao-jun; Lu, Xu-liang; Pan, Jia-liang; Zhang, Shuan-qin

    2015-07-01

    Due to the life characteristics such as physiological structure and transpiration, plants have unique optical and infrared features. In the optical band, because of the common effects of chlorophyll and water, plant leafs show spectral reflectance characteristics change in 550, 680, 1400 and 1900 nm significantly. In the infrared wave band, driven by transpiration, plants could regulate temperature on their own initiative, which make the infrared characteristics of plants different from artificial materials. So palnt bionic materials were proposed to simulate optical and infrared characteristics of plants. By analyzing formation mechanism of optical and infrared features about green plants, the component design and heat-transfer process of plants bionic materials were studied, above these the heat-transfer control formulation was established. Based on water adsorption/release compound, optical pigments and other man-made materials, plant bionic materials preparation methods were designed which could simulate the optical and infrared features of green plants. By chemical casting methods plant bionic material films were prepared, which use polyvinyl alcohol as film forming and water adsorption/release compound, and use optical pigments like chrome green and macromolecule yellow as colouring materials. The research conclusions achieved by testings figured out: water adsorption/release testing showed that the plant bionic materials with a certain thickness could absorb 1.3 kg water per square meter, which could satisfy the water usage of transpiration simulation one day; the optical and infrared simulated effect tests indicated that the plant bionic materials could preferably simulate the spectral reflective performance of green plants in optical wave band (380-2500 nm, expecially in 1400 and 1900 nm which were water absorption wave band of plants), and also it had similar daily infrared radiation variations with green plants, daily average radiation temperature

  10. Effect of bionic coupling units' forms on wear resistance of gray cast iron under dry linear reciprocating sliding condition

    Science.gov (United States)

    Pang, Zuobo; Zhou, Hong; Xie, Guofeng; Cong, Dalong; Meng, Chao; Ren, Luquan

    2015-07-01

    In order to get close to the wear form of guide rails, the homemade linear reciprocating wear testing machine was used for the wear test. In order to improve the wear-resistance of gray cast iron guide rail, bionic coupling units of different forms were manufactured by a laser. Wear behavior of gray-cast-iron with bionic-coupling units has been studied under dry sliding condition at room temperature using the wear testing machine. The wear resistance was evaluated by means of weight loss measurement and wear morphology. The results indicated that bionic coupling unit could improve the wear resistance of gray cast iron. The wear resistance of gray cast iron with reticulation bionic coupling unit is the best. When the load and speed changed, reticulation bionic coupling unit still has excellent performance in improving the wear resistance of gray cast iron.

  11. Lightweight Design and Verification of Gantry Machining Center Crossbeam Based on Structural Bionics

    Institute of Scientific and Technical Information of China (English)

    Ling Zhao; Jianfeng Ma; Wuyi Chen; Hongliang Guo

    2011-01-01

    The lightweight and high efficiency of natural structures are the inexhaustible sources for engineering improvements. The goal of the study is to find innovative solutions for mechanical lightweight design through the application of structural bionic approaches. Giant waterlily leaf ribs and cactus stem are investigated for their optimal framework and superior performance.Their structural characteristics are extracted and used in the bio-inspired design of Lin MC6000 gantry machining center crossbeam. By mimicking analogous network structure, the bionic model is established, which has better load-carrying capacity than conventional distribution. Finite Element Method (FEM) is used for numerical simulation. Results show better specific stiffness of the bionic model, which is increased by 17.36%. Finally the scaled models are fabricated by precision casting for static and dynamic tests. The physical experiments are compared to numerical simulation. The results show that the maximum static deformation of the bionic model is reduced by about 16.22%, with 3.31% weight reduction. In addition, the first four natural frequencies are improved obviously. The structural bionic design is a valuable reference for updating conventional mechanical structures with better performance and less material consumption.

  12. Numerical Experiment of the Solid Particle Erosion of Bionic Configuration Blade of Centrifugal Fan

    Institute of Scientific and Technical Information of China (English)

    Junqiu ZHANG; Zhiwu HAN; Wei YIN; Huiyuan WANG; Chao GE; Jialian JIANG

    2013-01-01

    In this paper,a bionic method was presented to improve the erosion resistance of blade of the centrifugal fan.A numerical investigation of the solid particle erosion on the standard and bionic configuration blade of 4-72N_o10C centrifugal fan was presented.The numerical study employs computational fluid dynamics (CFD) software,based on a finite volume method,in which the discrete phase model was used to modele the solid particles flow,and the Eulerian conservation equation was adopt to simulate the continuous phase.Moreover,user-defined function was used to define wear equation.The various diameters of the particles were taken into account.The positions of collision of standard and bionic fan blades were discussed,and two kinds of centrifugal fan blade wear were compared.The results show that the particles from the incident source with different positions have different processes of turning and movement when enter into the impeller.The trajectories of flow in the fan channel are significantly different for the particles with different diameters.Bionic fan blade have lower erosion rate than the standard fan blade when the particle size is 20 μm.The anti-erosion mechanism of the bionic fan blade was discussed.

  13. Design and Implementation of a Bionic Mimosa Robot with Delicate Leaf Swing Behavior

    Directory of Open Access Journals (Sweden)

    Chung-Liang Chang

    2014-12-01

    Full Text Available This study designed and developed a bionic mimosa robot with delicate leaf swing behaviors. For different swing behaviors, this study developed a variety of situations, in which the bionic mimosa robot would display different postures. The core technologies used were Shape Memory Alloys (SMAs, plastic material, and an intelligent control device. The technology particularly focused on the SMAs memory processing bend mode, directional guidance, and the position of SMAs installed inside the plastic material. Performance analysis and evaluation were conducted using two SMAs for mimosa opening/closing behaviors. Finally, by controlling the mimosa behavior with a micro-controller, the optimal strain swing behavior was realized through fuzzy logic control in order to display the different postures of mimosa under different situations. The proposed method is applicable to micro-bionic robot systems, entertainment robots, biomedical engineering, and architectural aesthetics-related fields in the future.

  14. Bionic optimization in structural design stochastically based methods to improve the performance of parts and assemblies

    CERN Document Server

    Gekeler, Simon

    2016-01-01

    The book provides suggestions on how to start using bionic optimization methods, including pseudo-code examples of each of the important approaches and outlines of how to improve them. The most efficient methods for accelerating the studies are discussed. These include the selection of size and generations of a study’s parameters, modification of these driving parameters, switching to gradient methods when approaching local maxima, and the use of parallel working hardware. Bionic Optimization means finding the best solution to a problem using methods found in nature. As Evolutionary Strategies and Particle Swarm Optimization seem to be the most important methods for structural optimization, we primarily focus on them. Other methods such as neural nets or ant colonies are more suited to control or process studies, so their basic ideas are outlined in order to motivate readers to start using them. A set of sample applications shows how Bionic Optimization works in practice. From academic studies on simple fra...

  15. From Hearing Aids, Prostheses and Cochlear Implants to "Bionic" Feedback Phonation

    Directory of Open Access Journals (Sweden)

    Petros Stagiopoulos

    2016-08-01

    Full Text Available In Otorhinolaryngological medical practice therapeutic devices are used that are highly invasive and immersive. For aural and oral communication these could be hearing aids, prosthetics, implants or radio-electronic appliances that build up a bionic environment with apparent tendencies for virtualization. The popularization of such devices promotes the extensive use of Brain Computer Interfaces to both the scientific community and the consumer market. The use of bionic devices clinched with synapses of the nerves does not merely mingle input activity to brain activity, but also it provides a virtual channel for augmenting and manipulating speech communication, language communication and even further musical communication. The effects of bionic aural and oral communication when learning practices for the impaired in hearing are applied is encountered in terms of ability for speech perception and linguistic competence

  16. The UC Softhand: Light Weight Adaptive Bionic Hand with a Compact Twisted String Actuation System

    OpenAIRE

    Mahmoud Tavakoli; Rafael Batista; Lucio Sgrigna

    2015-01-01

    In this paper, we present the design and development of the UC-Softhand. The UC Softhand is a low cost, Bionic and adaptive hand that takes advantage of compliant joints. By optimization of the actuation strategy as well as the actuation mechanism, we could develop an anthropomorphic hand that embeds three actuators, transmission mechanisms, controllers and drivers in the palm of the hand, and weighs only 280 g, making it one of the lightest bionic hands that has been created so far. The key ...

  17. Computer simulation of rolling wear on bionic non-smooth convex surfaces

    Institute of Scientific and Technical Information of China (English)

    HAN Zhi-wu; LIU Zu-bin; YANG Zhuo-juan; YAN Yu-ying; REN Lu-quan

    2004-01-01

    The study of bionics has found that the skins of many burrow animals which live in soil and stone conditions have an anti wear function, and which is related to their body surfaces' non-smooth morphology. In the present study, bionic non-smooth surfaces are used in roll surface design, and roll models with convex non-smooth surfaces are developed. The rolling wear of non-smooth roll in steel rolling is simulated by the FEM software-ANSYS. The equivalent stress, the node friction stress, and the node contact pressure between the roll and the rolling piece are calculated; and the anti-wear mechanism is analyzed.

  18. Numerical Study on Hydrodynamic Performance of Bionic Caudal Fin

    Directory of Open Access Journals (Sweden)

    Kai Zhou

    2016-01-01

    Full Text Available In this work, numerical simulations are conducted to reveal the hydrodynamic mechanism of caudal fin propulsion. In the modeling of a bionic caudal fin, a universal kinematics model with three degrees of freedom is adopted and the flexible deformation in the spanwise direction is considered. Navier-Stokes equations are used to solve the unsteady fluid flow and dynamic mesh method is applied to track the locomotion. The force coefficients, torque coefficient, and flow field characteristics are extracted and analyzed. Then the thrust efficiency is calculated. In order to verify validity and feasibility of the algorithm, hydrodynamic performance of flapping foil is analyzed. The present results of flapping foil compare well with those in experimental researches. After that, the influences of amplitude of angle of attack, amplitude of heave motion, Strouhal number, and spanwise flexibility are analyzed. The results show that, the performance can be improved by adjusting the motion and flexibility parameters. The spanwise flexibility of caudal fin can increase thrust force with high propulsive efficiency.

  19. Graphene-Based Bionic Composites with Multifunctional and Repairing Properties.

    Science.gov (United States)

    Valentini, L; Bittolo Bon, S; Signetti, S; Pugno, N M

    2016-03-01

    In this work, a novel bionic composite inspired by the concept of yeast fermentation has been proposed. It was observed that the addition of graphene nanoplatelets during the fermentation of extract of Saccharomyces cerevisiae fungi allows coupling of the graphene sheets to the yeast cell wall. This process resulted in the formation of a composite film with improved mechanical and electrical properties along with the capability of converting the light stimulus in the electrical signal. The mechanical properties of the prepared composites, namely, the fracture strength and Young's modulus, were studied via numerical simulations and are related to the properties of the constituent phases via rules of mixture. Finally, it was observed that graphene nanoplatelets, added to the nutrient broth, were able to reassemble onto the stressed cell surface and repair the surface cracking, partially restoring the pristine electrical and mechanical properties. The method reported here may find potential application in the development of self-healable bioelectronic devices and microorganism-based strain and chemical biosensors.

  20. Nanocarbon-Coated Porous Anodic Alumina for Bionic Devices

    Directory of Open Access Journals (Sweden)

    Morteza Aramesh

    2015-08-01

    Full Text Available A highly-stable and biocompatible nanoporous electrode is demonstrated herein. The electrode is based on a porous anodic alumina which is conformally coated with an ultra-thin layer of diamond-like carbon. The nanocarbon coating plays an essential role for the chemical stability and biocompatibility of the electrodes; thus, the coated electrodes are ideally suited for biomedical applications. The corrosion resistance of the proposed electrodes was tested under extreme chemical conditions, such as in boiling acidic/alkali environments. The nanostructured morphology and the surface chemistry of the electrodes were maintained after wet/dry chemical corrosion tests. The non-cytotoxicity of the electrodes was tested by standard toxicity tests using mouse fibroblasts and cortical neurons. Furthermore, the cell–electrode interaction of cortical neurons with nanocarbon coated nanoporous anodic alumina was studied in vitro. Cortical neurons were found to attach and spread to the nanocarbon coated electrodes without using additional biomolecules, whilst no cell attachment was observed on the surface of the bare anodic alumina. Neurite growth appeared to be sensitive to nanotopographical features of the electrodes. The proposed electrodes show a great promise for practical applications such as retinal prostheses and bionic implants in general.

  1. A bionic camera-based polarization navigation sensor.

    Science.gov (United States)

    Wang, Daobin; Liang, Huawei; Zhu, Hui; Zhang, Shuai

    2014-07-21

    Navigation and positioning technology is closely related to our routine life activities, from travel to aerospace. Recently it has been found that Cataglyphis (a kind of desert ant) is able to detect the polarization direction of skylight and navigate according to this information. This paper presents a real-time bionic camera-based polarization navigation sensor. This sensor has two work modes: one is a single-point measurement mode and the other is a multi-point measurement mode. An indoor calibration experiment of the sensor has been done under a beam of standard polarized light. The experiment results show that after noise reduction the accuracy of the sensor can reach up to 0.3256°. It is also compared with GPS and INS (Inertial Navigation System) in the single-point measurement mode through an outdoor experiment. Through time compensation and location compensation, the sensor can be a useful alternative to GPS and INS. In addition, the sensor also can measure the polarization distribution pattern when it works in multi-point measurement mode.

  2. Biomimetic approaches to bionic touch through a peripheral nerve interface.

    Science.gov (United States)

    Saal, Hannes P; Bensmaia, Sliman J

    2015-12-01

    State-of-the-art prosthetic hands nearly match the dexterity of the human hand, and sophisticated approaches have been developed to control them intuitively. However, grasping and dexterously manipulating objects relies heavily on the sense of touch, without which we would struggle to perform even the most basic activities of daily living. Despite the importance of touch, not only in motor control but also in affective communication and embodiment, the restoration of touch through bionic hands is still in its infancy, a shortcoming that severely limits their effectiveness. Here, we focus on approaches to restore the sense of touch through an electrical interface with the peripheral nerve. First, we describe devices that can be chronically implanted in the nerve to electrically activate nerve fibers. Second, we discuss how these interfaces have been used to convey basic somatosensory feedback. Third, we review what is known about how the somatosensory nerve encodes information about grasped objects in intact limbs and discuss how these natural neural codes can be exploited to convey artificial tactile feedback. Finally, we offer a blueprint for how these codes could be implemented in a neuroprosthetic device to deliver rich, natural, and versatile tactile sensations.

  3. Material design related investigation. Investigation on the bionic design; Zairyo sekkei kankei chosa. Bionic design ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    The biomolecular characteristics were analyzed to establish the basic technology for the utilization of artificial joint, liver and muscle. The rise in functional grade of biomolecules themselves, and inter-biomolecular recognition and bonding rationally and teleologically generates living body`s functions to form the structure and drive the molecules. Energywise extremely advantageous, those functions serve to creatively produce the artificial internal organs and elucidate the function of biotissue, if the tissue and function of living body can be artificially restructured by utilizing the biomolecular mechanism to make the tissue self-proper. It is the concept of bionic desing research. Methodologically, the inter-bimolecular action is to be synthetically analyzed through bio/physicochemistry-based computer simulation. The artificial materials excelling in adaptability to the living body are to be developed by analyzing the mechanism for the biotissue. The molecules-driving function is also to be analyzed which is generated dy the high-grade bonding of muscular and other high biomolecules. 280 refs., 69 figs., 9 tabs.

  4. Study on quantitative relation between characteristics of striature bionic coupling unit and wear resistance of gray cast iron

    Science.gov (United States)

    Pang, Zuobo; Zhou, Hong; Zhang, Peng; Cong, Dalong; Meng, Chao; Wang, Chuanwei; Ren, Luquan

    2015-03-01

    In order to improve the wear resistance of gray cast iron guide rail, striature bionic coupling units of different characteristics were manufactured by laser surface remelting. Wear behavior of gray cast iron with striature bionic coupling units has been studied under dry sliding condition at room temperature using a homemade linear reciprocating wear testing machine. The wear resistance was evaluated by means of weight loss measurement and wear morphology. The results indicated that there is a relationship between weight loss and the area of striature bionic coupling units and α: Δm = Δm0 - 0.0212S × cos α - 0.0241S × sin α.

  5. Influence of Cycle Temperature on the Wear Resistance of Vermicular Iron Derivatized with Bionic Surfaces

    Science.gov (United States)

    Sui, Qi; Zhang, Peng; Zhou, Hong; Liu, Yan; Ren, Luquan

    2016-11-01

    Depending on their applications, such as in brake discs, camshafts, etc., the wear behavior of vermicular iron is influenced by the thermal cycling regime. The failure of a working part during its service life is a consequence of both thermal fatigue and wear. Previously, the wear and thermal fatigue resistance properties of vermicular iron were separately investigated by researchers, rather than a study combining these two factors. In the present work, the effect of cycle temperature on the wear resistance of specimens with bionic units processed by laser has been investigated experimentally. The wear behavior pre- and post-thermal cycling has also been investigated, and the influence of different cycle temperatures on the wear resistance is discussed. The results indicate that the thermal cycling regime brought about negative influences with varying degrees, on the material properties, such as the microstructures, micro-hardness, cracks, and oxidation resistance properties. All these factors synergistically reduced the wear resistance of vermicular iron. In particular, the negative influence apparently increased with an increase in cycle temperature. Nevertheless, the post-thermal-cycle wear resistance of the specimens with bionic units was superior to those without bionic units. Hence, the laser bionic process is an effective way to improve the performance of vermicular iron in combined thermal cycling and wear service conditions.

  6. Influence of Cycle Temperature on the Wear Resistance of Vermicular Iron Derivatized with Bionic Surfaces

    Science.gov (United States)

    Sui, Qi; Zhang, Peng; Zhou, Hong; Liu, Yan; Ren, Luquan

    2016-08-01

    Depending on their applications, such as in brake discs, camshafts, etc., the wear behavior of vermicular iron is influenced by the thermal cycling regime. The failure of a working part during its service life is a consequence of both thermal fatigue and wear. Previously, the wear and thermal fatigue resistance properties of vermicular iron were separately investigated by researchers, rather than a study combining these two factors. In the present work, the effect of cycle temperature on the wear resistance of specimens with bionic units processed by laser has been investigated experimentally. The wear behavior pre- and post-thermal cycling has also been investigated, and the influence of different cycle temperatures on the wear resistance is discussed. The results indicate that the thermal cycling regime brought about negative influences with varying degrees, on the material properties, such as the microstructures, micro-hardness, cracks, and oxidation resistance properties. All these factors synergistically reduced the wear resistance of vermicular iron. In particular, the negative influence apparently increased with an increase in cycle temperature. Nevertheless, the post-thermal-cycle wear resistance of the specimens with bionic units was superior to those without bionic units. Hence, the laser bionic process is an effective way to improve the performance of vermicular iron in combined thermal cycling and wear service conditions.

  7. Electrocardiogram de-noising based on forward wavelet transform translation invariant application in bionic wavelet domain

    Indian Academy of Sciences (India)

    Mourad Talbi

    2014-08-01

    In this paper, we propose a new technique of Electrocardiogram (ECG) signal de-noising based on thresholding of the coefficients obtained from the application of the Forward Wavelet Transform Translation Invariant (FWT_TI) to each Bionic Wavelet coefficient. The De-noise De-noised ECG is obtained from the application of the inverse of BWT (BWT−1) to the de-noise de-noised bionic wavelet coefficients. For evaluating this new proposed de-noising technique, we have compared it to a thresholding technique in the FWT_TI domain. Preliminary tests of the application of the two de-noising techniques were constructed on a number of ECG signals taken from MIT-BIH database. The obtained results from Signal to Noise Ratio (SNR) and Mean Square Error (MSE) computations showed that our proposed de-noising technique outperforms the second technique. We have also compared the proposed technique to the thresholding technique in the bionic wavelet domain and this comparison was performed by SNR improvement computing. The obtained results from this evaluation showed that the proposed technique also outperforms the de-noising technique based on bionic wavelet coefficients thresholding.

  8. Research advances in coupling bionic optimization design method for CNC machine tools based on ergonomics

    Directory of Open Access Journals (Sweden)

    Shihao LIU

    2015-06-01

    Full Text Available Currently, most Chinese CNC machine tools' dynamic and static performances have large gap comparing with the similar foreign products, and the CNC machine tools users' human-centered design demand are ignored, which results in that the domestic CNC machine tools' overall competitiveness is relatively low. In order to solve the above problem, the ergonomics and coupling bionics are adopted to study collaborative optimization design method for CNC machine tools based on the domestic and foreign machine tool design method research achievement. The CNC machine tools' "man-machine-environment" interaction mechanism can be built by combining with ergonomic, and then the CNC ergonomic design criteria is obtained. Taking the coupling bionics as theoretical basis, the biological structures "morphology-structure-function-adaptive growth" multiple coupling mechanism can be studied, and the mechanical performance benefits structure can be extracted, then the CNC machine tools structural coupling bionic design technology is obtained by combining with the similarity principle. Combination of CNC machine tools' ergonomic design criteria and coupling bionic design technology, and considering the CNC machine tool performance's interaction and coupling mechanisms, a new multi-objective optimization design method can be obtained, which is verified through CNC machine tools' prototype experiments. The new optimization design method for CNC machine tools can not only help improve the whole machine's dynamic and static performance, but also has a bright prospect because of the "man-oriented" design concept.

  9. Rena Tangens & padeluun "bionic" / Rena Tangens, Padeluun ; interv. Tilman Baumgärtel

    Index Scriptorium Estoniae

    Tangens, Rena

    2006-01-01

    1997. a. Bielefeldis tehtud intervjuu sealsete kunstnike Rena Tangensi ja Padeluuniga, kes 1984. a. asutasid galerii "Art d'Ameublement", 1989. a. lõid elektroonilise kirjakasti "Bionic", osalevad Avaliku Liikuva ja Liikumatu Andmeringluse Edendamise Ühingu (FoeBud e. V:) liikmetena kongressidel, küsitlustel jm. ning peavad oma tegevust kunstiteose osaks

  10. Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units

    Directory of Open Access Journals (Sweden)

    Zheng Ma

    2015-01-01

    Full Text Available Background. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that bionic nonsmooth surface cleaning screens restrain the adhesion of rape materials, but the underlying mechanisms remain unclear. Objective. The reciprocating friction between rape stalk and bionic nonsmooth metal surface was examined. Methods. The short-time Fourier transform method was used to discriminate the stable phase of friction signals and the stick-lag distance was defined to analyze the stable reciprocating friction in a phase diagram. Results. The reciprocating friction between rape stalk and metal surface is a typical stick-slip friction, and the bionic nonsmooth metal surfaces with concave or convex units reduced friction force with increasing reciprocating frequency. The results also showed that the stick-lag distance of convex surface increased with reciprocating frequency, which indicated that convex surface reduces friction force more efficiently. Conclusions. We suggest that bionic nonsmooth surface cleaning screens, especially with convex units, restrain the adhesion of rape materials more efficiently compared to the smooth surface cleaning screens.

  11. Experimental Study of Reciprocating Friction between Rape Stalk and Bionic Nonsmooth Surface Units.

    Science.gov (United States)

    Ma, Zheng; Li, Yaoming; Xu, Lizhang

    2015-01-01

    Background. China is the largest producer of rape oilseed in the world; however, the mechanization level of rape harvest is relatively low, because rape materials easily adhere to the cleaning screens of combine harvesters, resulting in significant cleaning losses. Previous studies have shown that bionic nonsmooth surface cleaning screens restrain the adhesion of rape materials, but the underlying mechanisms remain unclear. Objective. The reciprocating friction between rape stalk and bionic nonsmooth metal surface was examined. Methods. The short-time Fourier transform method was used to discriminate the stable phase of friction signals and the stick-lag distance was defined to analyze the stable reciprocating friction in a phase diagram. Results. The reciprocating friction between rape stalk and metal surface is a typical stick-slip friction, and the bionic nonsmooth metal surfaces with concave or convex units reduced friction force with increasing reciprocating frequency. The results also showed that the stick-lag distance of convex surface increased with reciprocating frequency, which indicated that convex surface reduces friction force more efficiently. Conclusions. We suggest that bionic nonsmooth surface cleaning screens, especially with convex units, restrain the adhesion of rape materials more efficiently compared to the smooth surface cleaning screens.

  12. A new bionic MAV's flapping motion based on fruit fly hovering at low Reynolds number

    Institute of Scientific and Technical Information of China (English)

    Peng Bai; Erjie Cui; Feng Li; Weijiang Zhou; Bingyan Chen

    2007-01-01

    On the basis of the studies on the high unsteadyaerody namic mechanisms of the fruit fly hovering the aerodynamic advantages and disadvantages of the fruit fly flapping motion were analyzed. A new bionic flapping motion was proposed to weaken the disadvantages and maintain the advantages, it may be used in the designing and manufacturing of the micro air vehicles (MAV's). The translation of the new bionic flapping motion is the same as that of fruit fly flapping motion. However, the rotation of the new bionic flapping motion is different. It is not a pitching-up rotation as the fruit fly flapping motion, but a pitching-down rotation at the beginning and the end of a stroke. The numerical method of 3rd-order Roe scheme developed by Rogers was used to study these questions. The correctness of the numerical method and the computational program was justified by comparing the present CFD results of the fruit fly flapping motion in three modes, i.e., the advanced mode, the symmetrical mode and the delayed mode, with Dickinson's experimental results. They agreed with each other very well.Subsequently, the aerodynamic characteristics of the new bionic flapping motion in three modes were also numerically simulated, and were compared with those of the fruit fly flapping. The conclusions could be drawn that the high unsteady lift mechanism of the fruit fly hovering is also effectively utilized by this new bionic flapping. Compared with the fruit fly flapping, the unsteady drag of the new flapping decreases very much and the ratio of lift to drag increases greatly. And the great discrepancies among the mean lifts of three flapping modes of the fruit fly hovering are effectively smoothed inthe new flapping. On the other hand, this new bionic flapping motion should be realized more easily. Finally, it must bepointed out that the above conclusions were just drawn forthe hovering flapping motion. And the aerodynamic characteristics of the new bionic flapping motion in forward

  13. 仿生传感器技术发展探究%Research on Development of Bionic Sensing Technology

    Institute of Scientific and Technical Information of China (English)

    韦炜

    2012-01-01

    总体介绍了仿生传感技术的发展状况.从仿生传感器的产生和含义入手,着重论述了其类型和基本原理,进一步阐明了仿生传感器的发展趋势.对仿生传感技术的进一步研究具有启示作用.%General introduced the development of bionic sensor technology. Starting from production and meaning of bionic sensor, focuses on its types and basic principles, and further to elucidate the trend of bionic sensor. It has enlightenment function for further study of bionic sensing technology.

  14. Mechanism Simulation and Optimal Design of Five-Link Bionic Joint Driven by Two Antagonistic Pneumatic Muscles

    OpenAIRE

    Binrui Wang; Yinglian Jin; Tianhong Yan; Miao Cheng

    2013-01-01

    The five-link parallel mechanism is proposed to improve joint bionic performance, and the kinematics is established for the closed chain joint actuated by two antagonistic artificial pneumatic muscles (PMs). Interference and singularity constraints are analyzed, and the joint torque model is given based on the spring-damp dynamics. Through extracting the spring force term from torque equations, the compliance of bionic joint is derived and expressed as the ratio of angle to spring torque. Ene...

  15. On the generation of bionic pulses with conventional piezoelectric transducers by proper design of the input driving function

    OpenAIRE

    Cobo-Parra, P.; CarbÓ-FitÉ, R.

    1994-01-01

    This paper concerns with the capacity of piezoelectric transducers to generate bionic pulses, by proper design of the input driving function which equalizes their transfer function. Firstly, the transfer function is measured by performing the transducer in the pinger mode. The measured transfer function, together with the parameters of the desired bionic pulse (i.e. central frequency, stretching and chirp), are the inputs to a program to calculate the voltage function which should drive the t...

  16. Numerical simulations of self-propelled swimming of 3D bionic fish school

    Institute of Scientific and Technical Information of China (English)

    WU ChuiJie; WANG Liang

    2009-01-01

    Numerical simulations of self-propelled swimming of a three dimensional bionic fish and fish school in a viscous fluid are carried out. This is done with the assistance of a parallel software package producedfor 3D moving boundary problems. This computational fluid dynamics package combines the adaptive multi-grid finite volume method, the immersed boundary method and VOF (volume of fluid) method. By using the package results of the self-propelled swimming of a 3D bionic fish and fish school in a vis cous fluid are obtained. With comparison to the existing experimental measurements of living fishes, the predicted structure of vortical wakes is in good agreement with the measurements.

  17. Autonomous Navigation for Unmanned Aerial Vehicles Based on Chaotic Bionics Theory

    Institute of Scientific and Technical Information of China (English)

    Xiao-lei Yu; Yong-rong Sun; Jian-ye Liu; Bing-wen Chen

    2009-01-01

    In this paper a new reactive mechanism based on perception-action bionics for multi-sensory integration applied to Un-manned Aerial Vehicles (UAVs) navigation is proposed. The strategy is inspired by the olfactory bulb neural activity observed in rabbits subject to external stimuli. The new UAV navigation technique exploits the use of a muitiscroil chaotic system which i sable to be controlled in real-time towards less complex orbits, like periodic orbits or equilibrium points, considered as perceptive orbits. These are subject to real-time modifications on the basis of environment changes acquired through a Synthetic Aperture Radar (SAR) sensory system. The mathematical details of the approach are given including simulation results in a virtual en-vironment. The results demonstrate the capability of autonomous navigation for UAV based on chaotic bionics theory in com-plex spatial environments.

  18. A bionic approach to mathematical modeling the fold geometry of deployable reflector antennas on satellites

    Science.gov (United States)

    Feng, C. M.; Liu, T. S.

    2014-10-01

    Inspired from biology, this study presents a method for designing the fold geometry of deployable reflectors. Since the space available inside rockets for transporting satellites with reflector antennas is typically cylindrical in shape, and its cross-sectional area is considerably smaller than the reflector antenna after deployment, the cross-sectional area of the folded reflector must be smaller than the available rocket interior space. Membrane reflectors in aerospace are a type of lightweight structure that can be packaged compactly. To design membrane reflectors from the perspective of deployment processes, bionic applications from morphological changes of plants are investigated. Creating biologically inspired reflectors, this paper deals with fold geometry of reflectors, which imitate flower buds. This study uses mathematical formulation to describe geometric profiles of flower buds. Based on the formulation, new designs for deployable membrane reflectors derived from bionics are proposed. Adjusting parameters in the formulation of these designs leads to decreases in reflector area before deployment.

  19. Microelectrode Recording of Tissue Neural Oscillations for a Bionic Olfactory Biosensor

    Institute of Scientific and Technical Information of China (English)

    Qingjun Liu; Fenni Zhang; Ning Hu; Hua Wang; Kuen Jimmy Hsia; Ping Wang

    2012-01-01

    In olfactory research,neural oscillations exhibit excellent temporal regularity,which are functional and necessary at the physiological and cognitive levels.In this paper,we employed a bionic tissue biosensor which treats intact epithelium as sensing element to record the olfactory oscillations extracellularly.After being stimulated by odorant of butanedione,the olfactory receptor neurons generated different kinds of oscillations,which can be described as pulse firing oscillation,transient firing oscillation,superposed firing oscillation,and sustained firing oscillation,according to their temporal appearances respectively.With a time-frequency analysis of sonogram,the oscillations also demonstrated different frequency properties,such as δ,θ,α,β and γ oscillations.The results suggest that the bionic biosensor cooperated with sonogram analysis can well improve the investigation of olfactory oscillations,and provide a novel model for artificial olfaction sensor design.

  20. As Stainless as the Lotus--Fabricating Bionic Polymer Surface with a Self-cleaning Function

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ The artificial imitation of natural creatures has always been a forever dream in the fairy tales or scientific fictions. Thanks to the development of science and technology, this long-cherished dream has come true in some ways. Bionics, a branch of science concerned with applying the data and mechanisms of the functions of biological system to the solution of engineering problems, has become one of the frontier areas of science in the 21 st century, as what was shown in many reviews and books published in the late 20th century. In fact, human being got inspiration from the nature and created lots of bionic products in the past decades, e.g. the airplane and the radar.However, few examples are given in molecular-level or nano-scale artificial plant surface.

  1. Effects of setting angle on performance of fish-bionic wind wheel

    Science.gov (United States)

    Li, G. S.; Yang, Z. X.; Song, L.; Chen, Q.; Li, Y. B.; Chen, W.

    2016-08-01

    With the energy crisis and the increasing environmental pollutionmore and more efforts have been made about wind power development. In this paper, a new type of vertical axis named the fish-bionic wind wheel was proposed, and the outline of wind wheel was constructed by curve of Fourier fitting and polynomial equations. This paper attempted to research the relationship between the setting angle and the wind turbine characteristics by computational fluid dynamics (CFD) simulation. The results showed that the setting angle of the fish-bionic wind wheel has some significant effects on the efficiency of the wind turbine, Within the range of wind speed from 13m/s to 15m/s, wind wheel achieves the maximum efficiency when the setting angle is at 37 degree. The conclusion will work as a guideline for the improvement of wind turbine design.

  2. Numerical simulations of self-propelled swimming of 3D bionic fish school

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Numerical simulations of self-propelled swimming of a three dimensional bionic fish and fish school in a viscous fluid are carried out. This is done with the assistance of a parallel software package produced for 3D moving boundary problems. This computational fluid dynamics package combines the adaptive multi-grid finite volume method, the immersed boundary method and VOF (volume of fluid) method. By using the package results of the self-propelled swimming of a 3D bionic fish and fish school in a vis- cous fluid are obtained. With comparison to the existing experimental measurements of living fishes, the predicted structure of vortical wakes is in good agreement with the measurements.

  3. The UC Softhand: Light Weight Adaptive Bionic Hand with a Compact Twisted String Actuation System

    Directory of Open Access Journals (Sweden)

    Mahmoud Tavakoli

    2015-12-01

    Full Text Available In this paper, we present the design and development of the UC-Softhand. The UC Softhand is a low cost, Bionic and adaptive hand that takes advantage of compliant joints. By optimization of the actuation strategy as well as the actuation mechanism, we could develop an anthropomorphic hand that embeds three actuators, transmission mechanisms, controllers and drivers in the palm of the hand, and weighs only 280 g, making it one of the lightest bionic hands that has been created so far. The key aspect of the UC Softhand is utilization of a novel compact twisted string actuation mechanism, that allows a considerable weight and cost reduction compared to its predecessor.

  4. Knee Joint Optimization Design of Intelligent Bionic Leg Based on Genetic Algorithm

    Directory of Open Access Journals (Sweden)

    Hualong Xie

    2014-09-01

    Full Text Available Intelligent bionic leg (IBL is an advanced prosthesis which can maximum functionally simulate and approach the motion trajectory of human leg. Knee joint is the most important bone of human leg and its bionic design has great significance to prosthesis performance. The structural components of IBL are introduced and virtual prototype is given. The advantages of 4-bar knee joint are analyzed and are adopted in IBL design. The kinematics model of 4-bar knee joint is established. The objective function, constraint condition, parameters selection and setting of genetic algorithm are discussed in detail. Based on genetic algorithm, the optimization design of IBL knee joint is done. The optimization results indicate that the 4-bar mechanism can achieve better anthropomorphic characteristics of human knee joint.

  5. Principles of electromagnetic protection bionics and research of fault self-recovery mechanism

    Institute of Scientific and Technical Information of China (English)

    Yuan Liang; Man Menghua; Chang Xiaolong

    2014-01-01

    As we have borrowed the wisdom from biological neural network, the characteristic of interference- proof in information transferring process has been carefully studied. Our study includes the response of electrical-interference-proof circuit in electromagnetic environment, by means of bionics redesign. In this way, new principles, new technics and new ways are adopted to solve the unavoidable situations in traditional electro- magnet protection design. Based on the Boolean model, the complex bionic topological networks were firstly built and the charactoristics of degeneracy were analyzed, then the bidirectional actions between degeneracy in networks and the robustness of functions were proved in order to fill up the gap to deal with the need of interference-proof. Based on the creation of the neuron networks and the electrical synapses ' charac- teristic of plasticity, the impact of the distribution in the weight of synapse on the character of network self- recovery was studied afterwards so that the corresponding mechanism could be defined.

  6. Dynamic model and performance analysis of landing buffer for bionic locust mechanism

    Institute of Scientific and Technical Information of China (English)

    Dian-Sheng Chen; Zi-Qiang Zhang; Ke-Wei Chen

    2016-01-01

    The landing buffer is an important problem in the research on bionic locust jumping robots, and the differ-ent modes of landing and buffering can affect the dynamic performance of the buffering process significantly. Based on an experimental observation, the different modes of landing and buffering are determined, which include the different numbers of landing legs and different motion modes of legs in the buffering process. Then a bionic locust mechanism is established, and the springs are used to replace the leg muscles to achieve a buffering effect. To reveal the dynamic performance in the buffering process of the bionic locust mechanism, a dynamic model is established with different modes of landing and buffering. In particular, to analyze the buffering process conveniently, an equivalent vibration dynamic model of the bionic locust mechanism is proposed. Given the support forces of the ground to the leg links, which can be obtained from the dynamic model, the spring forces of the legs and the impact resistance of each leg are the important parameters affecting buffering performance, and evaluation principles for buffering performance are proposed according to the aforementioned parameters. Based on the dynamic model and these evaluation principles, the buffer-ing performances are analyzed and compared in different modes of landing and buffering on a horizontal plane and an inclined plane. The results show that the mechanism with the ends of the legs sliding can obtain a better dynamic per-formance. This study offers primary theories for buffering dynamics and an evaluation of landing buffer performance, and it establishes a theoretical basis for studies and engineer-ing applications.

  7. Bionic ankle–foot prosthesis normalizes walking gait for persons with leg amputation

    OpenAIRE

    Herr, Hugh M.; Grabowski, Alena M

    2011-01-01

    Over time, leg prostheses have improved in design, but have been incapable of actively adapting to different walking velocities in a manner comparable to a biological limb. People with a leg amputation using such commercially available passive-elastic prostheses require significantly more metabolic energy to walk at the same velocities, prefer to walk slower and have abnormal biomechanics compared with non-amputees. A bionic prosthesis has been developed that emulates the function of a biolog...

  8. A DNA Structure-Based Bionic Wavelet Transform and Its Application to DNA Sequence Analysis

    OpenAIRE

    Fei Chen; Yuan-Ting Zhang

    2003-01-01

    DNA sequence analysis is of great significance for increasing our understanding of genomic functions. An important task facing us is the exploration of hidden structural information stored in the DNA sequence. This paper introduces a DNA structure-based adaptive wavelet transform (WT) – the bionic wavelet transform (BWT) – for DNA sequence analysis. The symbolic DNA sequence can be separated into four channels of indicator sequences. An adaptive symbol-to-number mapping, determined from the s...

  9. Unifying inflation with late-time acceleration by a BIonic system

    OpenAIRE

    Alireza Sepehri; Farook Rahaman; Mohammad Reza Setare; Anirudh Pradhan; Salvatore Capozziello; Iftikar Hossain Sardar

    2015-01-01

    We propose a cosmological model that unifies inflation, deceleration and acceleration phases of expansion history by a BIonic system. At the beginning, there are k black fundamental strings that transited to the BIon configuration at a given corresponding point. Here, two coupled universes, brane and antibrane, are created interacting each other through a wormhole and inflate. With decreasing temperature, the energy of this wormhole flows into the universe branes and leads to inflation. After...

  10. Bionic Intelligent Optimization Algorithm Based on MMAS and Fish-Swarm Algorithm

    OpenAIRE

    Jingjing Yang; Benzhen Guo; Jixiang Gou; Xiao Zhang

    2013-01-01

    With large number of ants, the ant colony algorithm would always take a long time or is rather difficult to find the optimal path from complex chapter path, further more, there exists a contradiction between stagnation, accelerated convergence and precocity. In this paper, we propose a new bionic optimization algorithm. The main idea of the algorithm is to introduce the horizons concept in the MMAS fish swarm algorithm, so it would take shorter time to find the optimal path with numerous ants...

  11. Bionic Ears: Their Development and Future Advances Using Neurotrophins and Inherently Conducting Polymers

    OpenAIRE

    Clark, Graeme M.; Gordon Wallace

    2004-01-01

    The development of the multiple-channel bionic ear for hearing and speech understanding in profoundly deaf people is the result of integrating biological and physical sciences with engineering. It is the first clinically successful restoration of sensory and brain function, and brings electronic technology into a direct functional relationship with human consciousness. It presently transmits essential place and coarse temporal information for the coding of frequency, but the fine temporal and...

  12. Bionic Optimization Based Stability and Congestion Aware Routing Algorithm for Airborne Highly Dynamic Network

    OpenAIRE

    Yunlong Yu; Le Ru; Sheng Mao; Kangning Sun; Qiangqiang Yu; Kun Fang

    2016-01-01

    Airborne highly dynamic ad hoc UAV network has features of high node mobility, fast changing network topology, and complex application environment. The performance of traditional routing algorithms is so poor over aspects such as end to end delay, data packet delivery ratio, and routing overhead that they cannot provide efficient communication for multi-UAVs carrying out missions synergistically. A bionic optimization based stability and congestion aware routing algorithm—BSCAR algorithm—is p...

  13. Dynamic model and performance analysis of landing buffer for bionic locust mechanism

    Science.gov (United States)

    Chen, Dian-Sheng; Zhang, Zi-Qiang; Chen, Ke-Wei

    2016-06-01

    The landing buffer is an important problem in the research on bionic locust jumping robots, and the different modes of landing and buffering can affect the dynamic performance of the buffering process significantly. Based on an experimental observation, the different modes of landing and buffering are determined, which include the different numbers of landing legs and different motion modes of legs in the buffering process. Then a bionic locust mechanism is established, and the springs are used to replace the leg muscles to achieve a buffering effect. To reveal the dynamic performance in the buffering process of the bionic locust mechanism, a dynamic model is established with different modes of landing and buffering. In particular, to analyze the buffering process conveniently, an equivalent vibration dynamic model of the bionic locust mechanism is proposed. Given the support forces of the ground to the leg links, which can be obtained from the dynamic model, the spring forces of the legs and the impact resistance of each leg are the important parameters affecting buffering performance, and evaluation principles for buffering performance are proposed according to the aforementioned parameters. Based on the dynamic model and these evaluation principles, the buffering performances are analyzed and compared in different modes of landing and buffering on a horizontal plane and an inclined plane. The results show that the mechanism with the ends of the legs sliding can obtain a better dynamic performance. This study offers primary theories for buffering dynamics and an evaluation of landing buffer performance, and it establishes a theoretical basis for studies and engineering applications.

  14. Fabrication of a Bionic Needle with both Super-Hydrophobic and Antibacterial Properties

    Institute of Scientific and Technical Information of China (English)

    Xin Qi; Wei Song; Zhu Mao; Wenran Gao; Qian Cong

    2013-01-01

    Many biological surfaces possess unusual micro-nano hierarchical structures that could influence their wettability,which provide new methods for the construction of novel materials.In this work,silver nanoparticles were successfully coated on the surface of stainless steel needle by a simple electroless replacement reaction process between the AgNO3 solution and the activated stainless steel needle.After the replacement reaction,porous micro/nanostrctures were formed on the surface of the stainless steel needle.By modifying long chains ofthiol molecules,the stainless steel needle exhibited good super-hydrophobic property with a contact angle greater than 150°.Moreover,the silver coated stainless steel needle (bionic needle) showed strong antibacterial activity against the gram-negative bacterium Escherichia coli (E.coli).By calculating the area of the inhibition zone against E.coli formed on agar medium,the antibacterial activity of the bionic needle with the contact angle of 152° is much better than that with the contact angle of 138°.The as-prepared bionic needle with both super-hydrophobic and antibacterial properties has the potential to be applied in modem medical devices.

  15. 同步仿生机械臂设计%Design of Synchronous Bionic Arm

    Institute of Scientific and Technical Information of China (English)

    张昊; 王超亮; 田文龙; 李擎

    2015-01-01

    针对目前机械臂的应用存在操作复杂、设计繁琐等不足,设计一套由MCU、加速度计、直流舵机和臂环等构成的同步仿生机械臂.介绍系统总体设计,通过信号转换算法使采集信号转换为驱动舵机转动的 PWM 控制信号,采用程序消抖算法进行优化,并进行实验验证.结果表明:该仿生机械臂控制灵活,使用简单,成本低廉,可推广应用于仿人手臂运动作业、主从机械臂系统的研究领域.%Aiming at the shortcomings of complex operation and excessively detailed design, design a synchronous motion bionic arm which is composed by the MCU, accelerometers, DC servos and arm rings. Introduce the system overall design, through signal change algorithm, change choosing signal into PWM control signal for driving actuator running. Carry out optimization by using program chattering elimination algorithm. Then, carry out test verification. The result shows that the bionic arm control is nimble, easy to use with low cost. It can be used fields such as bionic arm operation, master-slave manipulator system and so on.

  16. Bionic Optimisation of the Earthquake Resistance of High Buildings by Tuned Mass Dampers

    Institute of Scientific and Technical Information of China (English)

    Rolf Steinbuch

    2011-01-01

    The optimisation of earthquake resistance of high buildings by multi-tuned mass dampers was investigated using bionic algorithms. In bionic or evolutionary optimisation studies the properties of parents are crossed and mutated to produce a new generation with slightly different properties. The kids which best satisfy the object of the study, become the parents of the next generation. After a series of generations essential improvements of the object may be observed. Tuned mass dampers are widely used to reduce the impact of dynamic excitations on structures. A single mass system and multi-mass oscillators help to explain the mechanics of the dampers. To apply the bionic optimisation strategy to high buildings with passive tuned mass dampers subject to seismic loading a special beam element has been developed. In addition to the 6 degrees of freedom of a conventional beam element, it has 2 degrees of freedom for the displacements of the dampers. It allows for fast studies of many variants. As central result, efficient designs for damping systems along the height of an edifice are found. The impact on the structure may be reduced essentially by the use of such dampers designed to interact in an optimal way.

  17. Design and Analysis of Bionic Cutting Blades Using Finite Element Method.

    Science.gov (United States)

    Li, Mo; Yang, Yuwang; Guo, Li; Chen, Donghui; Sun, Hongliang; Tong, Jin

    2015-01-01

    Praying mantis is one of the most efficient predators in insect world, which has a pair of powerful tools, two sharp and strong forelegs. Its femur and tibia are both armed with a double row of strong spines along their posterior edges which can firmly grasp the prey, when the femur and tibia fold on each other in capturing. These spines are so sharp that they can easily and quickly cut into the prey. The geometrical characteristic of the praying mantis's foreleg, especially its tibia, has important reference value for the design of agricultural soil-cutting tools. Learning from the profile and arrangement of these spines, cutting blades with tooth profile were designed in this work. Two different sizes of tooth structure and arrangement were utilized in the design on the cutting edge. A conventional smooth-edge blade was used to compare with the bionic serrate-edge blades. To compare the working efficiency of conventional blade and bionic blades, 3D finite element simulation analysis and experimental measurement were operated in present work. Both the simulation and experimental results indicated that the bionic serrate-edge blades showed better performance in cutting efficiency.

  18. The Mechanism of Drag Reduction around Bodies of Revolution Using Bionic Non-Smooth Surfaces

    Institute of Scientific and Technical Information of China (English)

    Li-mei Tian; Lu-quan Ren; Qing-ping Liu; Zhi-wu Han; Xiao Jiang

    2007-01-01

    Bionic non-smooth surfaces (BNSS) can reduce drag. Much attention has been paid to the mechanism of shear stress reduction by riblets. The mechanism of pressure force reduction by bionic non-smooth surfaces on bodies of revolution has not been, well investigated. In this work CFD simulation has revealed the mechanism of drag reduction by BNSS, which may work in three ways. First, BNSS on bodies of revolution may lower the surface velocity of the medium, which prevents the sudden speed up of air on the cross section. So the bottom pressure of the model would not be disturbed sharply, resulting in less energy loss and drag reduction. Second, the magnitude of vorticity induced by the bionic model becomes smaller because, due to the sculpturing, the growth of tiny air bubbles is avoided. Thus the large moment of inertia induced by large air bubble is reduced. The reduction of the vorticity could reduce the dissipation of the eddy. So the pressure force could also be reduced. Third, the thickness of the momentum layer on the model becomes less which, according to the relationship between the drag coefficient and the momentum thickness, reduces drag.

  19. Bionic cardiology: exploration into a wealth of controllable body parts in the cardiovascular system.

    Science.gov (United States)

    Sugimachi, Masaru; Sunagawa, Kenji

    2009-01-01

    Bionic cardiology is the medical science of exploring electronic control of the body, usually via the neural system. Mimicking or modifying biological regulation is a strategy used to combat diseases. Control of ventricular rate during atrial fibrillation by selective vagal stimulation, suppression of ischemia-related ventricular fibrillation by vagal stimulation, and reproduction of neurally commanded heart rate are some examples of bionic treatment for arrhythmia. Implantable radio-frequency-coupled on-demand carotid sinus stimulators succeeded in interrupting or preventing anginal attacks but were replaced later by coronary revascularization. Similar but fixed-intensity carotid sinus stimulators were used for hypertension but were also replaced by drugs. Recently, however, a self-powered implantable device has been reappraised for the treatment of drug-resistant hypertension. Closed-loop spinal cord stimulation has successfully treated severe orthostatic hypotension in a limited number of patients. Vagal nerve stimulation is effective in treating heart failure in animals, and a small-size clinical trial has just started. Simultaneous corrections of multiple hemodynamic abnormalities in an acute decompensated state are accomplished simply by quantifying fundamental cardiovascular parameters and controlling these parameters. Bionic cardiology will continue to promote the development of more sophisticated device-based therapies for otherwise untreatable diseases and will inspire more intricate applications in the twenty-first century.

  20. Design and Analysis of Bionic Cutting Blades Using Finite Element Method

    Directory of Open Access Journals (Sweden)

    Mo Li

    2015-01-01

    Full Text Available Praying mantis is one of the most efficient predators in insect world, which has a pair of powerful tools, two sharp and strong forelegs. Its femur and tibia are both armed with a double row of strong spines along their posterior edges which can firmly grasp the prey, when the femur and tibia fold on each other in capturing. These spines are so sharp that they can easily and quickly cut into the prey. The geometrical characteristic of the praying mantis’s foreleg, especially its tibia, has important reference value for the design of agricultural soil-cutting tools. Learning from the profile and arrangement of these spines, cutting blades with tooth profile were designed in this work. Two different sizes of tooth structure and arrangement were utilized in the design on the cutting edge. A conventional smooth-edge blade was used to compare with the bionic serrate-edge blades. To compare the working efficiency of conventional blade and bionic blades, 3D finite element simulation analysis and experimental measurement were operated in present work. Both the simulation and experimental results indicated that the bionic serrate-edge blades showed better performance in cutting efficiency.

  1. Design Principles of the Non-smooth Surface of Bionic Plow Moldboard

    Institute of Scientific and Technical Information of China (English)

    Luquan Ren; Shiqiao Deng; Jingchun Wang; Zhiwu Han

    2004-01-01

    The diverse non-smooth body surfaces to reduce soil adhesion are the evolutional results for the soil animals to fit the adhesive and wet environment and can be used as a biological basis for the design of bionic plow moldboard. The model surfaces for bionic simulation should be taken from soil animal digging organs, on which the soil motion is similar to what is on the surface of moldboard. By analyzing the distribution of non-smooth units on the body surface of the ground beetle jaw and the soil moving stresses, the design principles of the bionic moldboard for the local and the whole moldboard were presented respectively. As well, the effect of soil moving speed on reducing adhesion, the dimensions relationship between soil particles and non-smooth convexes, the relationship between the enveloping surface of non-smooth convexes and the initial smooth surface of the plow body, and the convex types of the sphere coronal and the pangolin scales, etc. were discussed.

  2. High-sensitive and high-efficient biochemical analysis method using a bionic electronic eye in combination with a smartphone-based colorimetric reader system.

    Science.gov (United States)

    Kaiqi Su; Quchao Zou; Ning Hu; Ping Wang

    2015-08-01

    Bionic electronic eye (Bionic e-Eye), a developed smartphone-based colorimetric reader system, consists of smartphone or pad (iPhone 4s or iPad 3) as detection instrument and portable accessory as illumination provider, integrating with a wide-angle lens, a piece of lowest-power electro luminescent and a custom-made dark hood. A 96-well microtiter plate (MTP) was positioned on the electro luminescent and Bionic e-Eye captures the detection images by the back camera of smartphone. Being similar to human visual system, the hue, saturation and value (HSV, also called hex cone model) color model was employed in image processing algorithm of Bionic e-Eye. Optimized system dimension was determined by the system steadiness experiment of different photograph distances. Moreover, the commercially available BCA protein assay and CCK8 cell number assay were carried out to evaluate this Bionic e-Eye. Analytical performance of Bionic e-Eye had the better precision, higher sensitivity than microtiter plate reader (MTPR) and previous smartphone-based colorimetric reader for both two assays. Also, Bionic e-Eye using optical image detection had simultaneous and synchronous working mode, while MPTR using machine moving detection had asynchronous working mode in high throughput detection. Therefore, Bionic e-Eye will be an ideal point-of-care (POC) colorimetric detection device in the field of clinical application, industrial quality control, environment monitoring, and food assessment. PMID:26738081

  3. High-sensitive and high-efficient biochemical analysis method using a bionic electronic eye in combination with a smartphone-based colorimetric reader system.

    Science.gov (United States)

    Kaiqi Su; Quchao Zou; Ning Hu; Ping Wang

    2015-01-01

    Bionic electronic eye (Bionic e-Eye), a developed smartphone-based colorimetric reader system, consists of smartphone or pad (iPhone 4s or iPad 3) as detection instrument and portable accessory as illumination provider, integrating with a wide-angle lens, a piece of lowest-power electro luminescent and a custom-made dark hood. A 96-well microtiter plate (MTP) was positioned on the electro luminescent and Bionic e-Eye captures the detection images by the back camera of smartphone. Being similar to human visual system, the hue, saturation and value (HSV, also called hex cone model) color model was employed in image processing algorithm of Bionic e-Eye. Optimized system dimension was determined by the system steadiness experiment of different photograph distances. Moreover, the commercially available BCA protein assay and CCK8 cell number assay were carried out to evaluate this Bionic e-Eye. Analytical performance of Bionic e-Eye had the better precision, higher sensitivity than microtiter plate reader (MTPR) and previous smartphone-based colorimetric reader for both two assays. Also, Bionic e-Eye using optical image detection had simultaneous and synchronous working mode, while MPTR using machine moving detection had asynchronous working mode in high throughput detection. Therefore, Bionic e-Eye will be an ideal point-of-care (POC) colorimetric detection device in the field of clinical application, industrial quality control, environment monitoring, and food assessment.

  4. Dynamic bending of bionic flexible body driven by pneumatic artificial muscles(PAMs) for spinning gait of quadruped robot

    Science.gov (United States)

    Lei, Jingtao; Yu, Huangying; Wang, Tianmiao

    2016-01-01

    The body of quadruped robot is generally developed with the rigid structure. The mobility of quadruped robot depends on the mechanical properties of the body mechanism. It is difficult for quadruped robot with rigid structure to achieve better mobility walking or running in the unstructured environment. A kind of bionic flexible body mechanism for quadruped robot is proposed, which is composed of one bionic spine and four pneumatic artificial muscles(PAMs). This kind of body imitates the four-legged creatures' kinematical structure and physical properties, which has the characteristic of changeable stiffness, lightweight, flexible and better bionics. The kinematics of body bending is derived, and the coordinated movement between the flexible body and legs is analyzed. The relationship between the body bending angle and the PAM length is obtained. The dynamics of the body bending is derived by the floating coordinate method and Lagrangian method, and the driving force of PAM is determined. The experiment of body bending is conducted, and the dynamic bending characteristic of bionic flexible body is evaluated. Experimental results show that the bending angle of the bionic flexible body can reach 18°. An innovation body mechanism for quadruped robot is proposed, which has the characteristic of flexibility and achieve bending by changing gas pressure of PAMs. The coordinated movement of the body and legs can achieve spinning gait in order to improve the mobility of quadruped robot.

  5. Numerical Simulation of the Effect of Bionic Serrated Structures on the Aerodynamic Noise of a Circular Cylinder

    Institute of Scientific and Technical Information of China (English)

    Lei Shi; Chengchun Zhang; Jing Wang; Luquan Ren

    2012-01-01

    Flow control can effectively reduce the aerodynamic noise radiated from a circular cylinder.As one of the flow control methods,a bionic method,inspired by the serrations at the leading edge of owls' wing,was proposed in this paper.The effects of bionic serrated structures arranged on the upper and lower sides of a cylinder on the aerodynamic and aeroacoustic performance of the cylinder were numerically investigated.At a free stream speed of 24.5 m·s-1,corresponding to Reynolds number of 1.58 × 104,the simulation results indicate that the bionic serrated structures can decrease the frequency of the vortex shedding and control the fluctuating aerodynamic force acting on the cylinder,thus reduce the aerodynamic noise.A qualitative-view of the vorticity in the wake of the cylinder suggest that the serrated structures reduce aerodynamic sound by suppressing the unsteady motion of vortices.

  6. Effect of the microhardness difference between base metal and bionic coupling unit on wear resistance of gray cast iron

    Science.gov (United States)

    Pang, Zuobo; Zhou, Hong; Chang, Fang; Zhang, Peng; Cong, Dalong; Meng, Chao; Wang, Chuanwei; Ren, Luquan

    2015-12-01

    In order to improve the wear resistance of gray cast iron guide rail, the samples with different microhardness difference between bionic coupling units and base metal were manufactured by laser surface remelting. Wear behavior of gray cast iron with bionic coupling units has been studied under dry sliding condition at room temperature using a homemade liner reciprocating wear testing machine. The wear resistance was evaluated by means of weight loss measurement and wear morphology. The results indicated that when the microhardness difference is 561 HV0.2, the wear resistance of sample is the best.

  7. 试论仿生设计在陶瓷产品设计中的应用%The Application of Bionic Design in Ceramic Product Design

    Institute of Scientific and Technical Information of China (English)

    张悦; 吴小华; 任远

    2013-01-01

    仿生设计是一种新的设计思维和方法,文章以理论结合实例的研究方法,从仿生设计的视角研究陶瓷产品的设计开发问题,主要是从肌理仿生、整体形态仿生和局部形态仿生等方面谈仿生设计在陶瓷产品设计中的具体应用问题.仿生设计介入陶瓷产品设计具有启迪陶瓷产品设计师思维,彰显陶瓷产品个性化和趣味性的价值.%The bionic design is one kind of new design thinking and methods,and the article to the study of the theory with examples from bionic design perspective of ceramic product design and development issues,mainly in terms of texture bionic overall shape bionic and partial shape bionic discusses bionic design specific applications in the design of ceramic products.Bionic design intervention ceramic product design inspiration ceramic product designers thinking,highlighting the value of ceramic products personalized and interesting.

  8. Design of a Robot End-Effector Grabbing Mechanism Based on a Bionic Snake Mouth

    OpenAIRE

    Fu Zhuang; Zhou Hangfei; Liu Zijuan; Fei Jian; Yan Weixin; Zhao Yanzheng

    2013-01-01

    Inspired by the bite and swallowing function of a snake’s mouth, a robot end‐effector grabbing mechanism was designed. The grabbing movement is realized by the ‘bite’ function of the bionic snake mouth actuator, and the ‘swallowing’ function insures a continuous grip on the object. To implement the continuous grip function of the new robot end‐effector, the complex motion of a snake’s mouth is simplified into three basic movements based on the anatomy of a snake’s mouth and with a combination...

  9. 仿生纺品与服装%Bionic Textiles and Garment

    Institute of Scientific and Technical Information of China (English)

    陈丽华

    2011-01-01

    对目前国内外研究开发的仿生纺织品与服装进行了综述,包括仿生功能纺织品与服装,智能仿生纺织品与服装.详细介绍了各类仿生纺织品与服装的仿生原理、主要产品及其应用.%The study progress of bionic textiles and garment in recent years were reviewed. The principle of functional textiles and intelligent textiles were discussed in detail. The relevant products and its appalication were also introduced.

  10. Tea classification based on artificial olfaction using bionic olfactory neural network

    OpenAIRE

    X. L. Yang; Fu, J.; Lou, Z G; L. Y. Wang; Li, G.; Freeman, Walter J III

    2006-01-01

    Based on the research on mechanism of biological olfactory system, we constructed a K-set, which is a novel bionic neural network. Founded on the groundwork of K0, KI and KII sets, the KIII set in the K-set hierarchy simulates the whole olfactory neural system. In contrast to the conventional artificial neural networks, the KIII set operates in nonconvergent 'chaotic' dynamical modes similar to the biological olfactory system. In this paper, an application of electronic nose-brain for tea cla...

  11. Preparation of bionic nanostructures from butterfly wings and their low reflectivity of ultraviolet

    Science.gov (United States)

    Han, Z. W.; Niu, S. C.; Li, W.; Ren, L. Q.

    2013-06-01

    This letter presents a bionic study on Parnassius butterfly wings with a prominent ultraviolet (UV)-selective antireflection effect. An accurate SiO2 inverse replica of the nanostructure with a unique optical function from butterfly wings is prepared in multiscale by combining a sol-gel process and subsequent selective etching. It is found that the original nanostructures of biotemplate are well inherited and the excellent UV-antireflection function could be modulated by tunable parameters such as the replica spacing, width, distribution, and shape as well as formation.

  12. Tangent Resistance of Soil on Moldboard and the Mechanism of Resistance Reduction of Bionic Moldboard

    Institute of Scientific and Technical Information of China (English)

    Deng Shi-qiao; Ren Lu-quan; Liu Yan; Han Zhi-wu

    2005-01-01

    The tangent resistance on the interface of the soil-moldboard is an important component of the resistance to moving soil . We developed simplified mechanical models to analyze this resistance. We found that it is composed of two components, the frictional and adhesive resistances. These two components originate from the soil pore, which induced a capillary suction effect, and the soil-moldboard contact area produced tangent adhesive resistance. These two components varied differently with soil moisture. Thus we predicted that resistance reduction against soil exerted on the non-smooth bionic moldboard is mainly due to the elimination of capillary suction and the reduction of physical-chemical adsorption of soil.

  13. A simple and accurate numerical network flow model for bionic micro heat exchangers

    Energy Technology Data Exchange (ETDEWEB)

    Pieper, M.; Klein, P. [Fraunhofer Institute (ITWM), Kaiserslautern (Germany)

    2011-05-15

    Heat exchangers are often associated with drawbacks like a large pressure drop or a non-uniform flow distribution. Recent research shows that bionic structures can provide possible improvements. We considered a set of such structures that were designed with M. Hermann's FracTherm {sup registered} algorithm. In order to optimize and compare them with conventional heat exchangers, we developed a numerical method to determine their performance. We simulated the flow in the heat exchanger applying a network model and coupled these results with a finite volume method to determine the heat distribution in the heat exchanger. (orig.)

  14. Materials design considerations involved in the fabrication of implantable bionics by metallization of ceramic substrates.

    Science.gov (United States)

    Patel, Sunil; Guenther, Thomas; Dodds, Christopher W D; Kolke, Sergej; Privat, Karen L; Matteucci, Paul B; Suaning, Gregg J

    2013-01-01

    The Pt metallization of co-fired Al2O3/SiO2 substrates containing Pt feedthroughs was shown to be a suitable means to construct implantable bionics. The use of forge welding to join an electrode to such a metallized feedthrough was demonstrated and subsequently evaluated through the use of metallography and electron microscopy. Metallurgical phenomena involved in forge welding relevant to the fabrication of all types of biomedical implants are discussed within this paper. The affect of thermal profiles used in brazing or welding to build implantable devices from metal components is analysed and the case for considered selection of alloys in implant design is put forward.

  15. Numerical simulation of effect of bionic V-riblet non-smooth surface on tire anti-hydroplaning

    Institute of Scientific and Technical Information of China (English)

    周海超; 王国林; 杨建; 薛开鑫

    2015-01-01

    Inspired by the idea that bionic non-smooth surfaces (BNSS) can reduce fluid adhesion and resistance, and the effect of bionic V-riblet non-smooth structure arranged in tire tread pattern grooves surface on anti-hydroplaning performance was investigated by using computational fluid dynamics (CFD). The physical model of the object (model of V-riblet surface distribution, hydroplaning model) and SSTk−ω turbulence model were established for numerical analysis of tire hydroplaning. With the help of a orthogonal table L16(45), the parameters of V-riblet structure design compared to the smooth structure were analyzed, and obtained the priority level of the experimental factors as well as the best combination within the scope of the experiment. The simulation results show that V-riblet structure can reduce water flow resistance by disturbing the eddy movement in boundary layers. Then, the preferred type of V-riblet non-smooth structure was arranged on the bottom of tire grooves for hydroplaning performance analysis. The results show that bionic V-riblet non-smooth structure can effectively increase hydroplaning velocity and improve tire anti-hydroplaning performance. Bionic design of tire tread pattern grooves is a good way to promote anti-hydroplaning performance without increasing additional groove space, so that tire grip performance and roll noise are avoided due to grooves space enlargement.

  16. An Experimental Study on a Microclimatic Layer of a Bionic Fa(c)ade Inspired by Vertical Greenery

    Institute of Scientific and Technical Information of China (English)

    Toma(z) (S)uklje; Sa(s)o Medved; Ciril Arkar

    2013-01-01

    A microclimatic layer of the green fa(c)ade is proven to have specific temperature and flow conditions on the building envelope.Lower temperatures and wind velocities,and higher relative humidity in the microclimatic layer are the characteristics of vertical greenery systems,which cause lower energy consumption for the cooling and heating of buildings.Despite innovative architectural solutions,there are some drawbacks to applying vertical greenery on building envelopes.In this study,a bionic fa(c)ade that mimics the positive effects and eliminates the disadvantages of green fa(c)ades is presented.The bionic fa(c)ade consists of bionic leaves,which are made of photovoltaic cells and evaporative matrices.A real scale experiment was carried out in the summer to evaluate the potential of the cooling efficiency of the microclimatic layer and a new photovoltaic cooling technique.The results show a good agreement of the thermal performance between the bionic and the green fa(c)ade and up to 20.8 K lower surface temperatures of photovoltaic cells,which increase the daily electricity yield by 6.6%.

  17. Multiadaptive Bionic Wavelet Transform: Application to ECG Denoising and Baseline Wandering Reduction

    Science.gov (United States)

    Sayadi, Omid; Shamsollahi, Mohammad B.

    2007-12-01

    We present a new modified wavelet transform, called the multiadaptive bionic wavelet transform (MABWT), that can be applied to ECG signals in order to remove noise from them under a wide range of variations for noise. By using the definition of bionic wavelet transform and adaptively determining both the center frequency of each scale together with the[InlineEquation not available: see fulltext.]-function, the problem of desired signal decomposition is solved. Applying a new proposed thresholding rule works successfully in denoising the ECG. Moreover by using the multiadaptation scheme, lowpass noisy interference effects on the baseline of ECG will be removed as a direct task. The method was extensively clinically tested with real and simulated ECG signals which showed high performance of noise reduction, comparable to those of wavelet transform (WT). Quantitative evaluation of the proposed algorithm shows that the average SNR improvement of MABWT is 1.82 dB more than the WT-based results, for the best case. Also the procedure has largely proved advantageous over wavelet-based methods for baseline wandering cancellation, including both DC components and baseline drifts.

  18. A Novel System for Moving Object Detection Using Bionic Compound Eyes

    Institute of Scientific and Technical Information of China (English)

    Huabo Sun; Haimeng Zhao; Peter Mooney; Hongying Zhao; Daping Liu; Lei Yan

    2011-01-01

    Conventional moving target detection focuses on algorithms to improve detection efficiency. These algorithms pay less attention to the image acquisition means, and usually solve specific problems. This often results in poor flexibility and reusability. Insect compound eyes offer unique advantages for moving target detection and these advantages have attracted the attention of many researchers in recent years. In this paper we proposed a new system for moving target detection. We used the detection mechanism of insect compound eyes for the simulation of the characteristics of structure, control, and function. We discussed the design scheme of the system, the development of the bionic control circuit, and introduced the proposed mathematical model of bionic compound eyes for data acquisition and object detection. After this the integrated system was described and discussed. Our paper presents a novel approach for moving target detection. This approach effectively tackles some of the well-known problems in the field of view, resolution, and real-time processing problems in moving target detection.

  19. Bionic Mechanism and Kinematics Analysis of Hopping Robot Inspired by Locust Jumping

    Institute of Scientific and Technical Information of China (English)

    Diansheng Chen; Junmao Yin; Kai Zhao; Wanjun Zheng; Tianmiao Wang

    2011-01-01

    A flexible-rigid hopping mechanism which is inspired by the locust jumping was proposed,and its kinematic characteristics were analyzed.A series of experiments were conducted to observe locust morphology and jumping process.According to classic mechanics,the jumping process analysis was conducted to build the relationship of the locust jumping parameters.The take-off phase was divided into four stages in detail.Based on the biological observation and kinematics analysis,a mechanical model was proposed to simulate locust jumping.The forces of the flexible-rigid hopping mechanism at each stage were analyzed.The kinematic analysis using pseudo-rigid-body model was described by D-H method.It is confirmed that the proposed bionic mechanism has the similar performance as the locust hind leg in hopping.Moreover,the jumping angle which decides the jumping process was discussed,and its relation with other parameters was established.A calculation case analysis corroborated the method.The results of this paper show that the proposed bionic mechanism which is inspired by the locust hind limb has an excellent kinematics performance,which can provide a foundation for design and motion planning of the hopping robot.

  20. The mechanical properties and microstructure of the bionic alloy-ceramic laminated composite

    International Nuclear Information System (INIS)

    Highlights: → The bionic alloy-ceramic laminated composite was fabricated by EB-PVD. → Mechanical properties and microstructure of laminated composite were investigated. → Laminated composite was heat treated in order to improve the tensile strength. -- Abstract: In the present work, the bionic alloy-ceramic laminated composite was fabricated by electron beam-physical vapor deposition method. The ingots of Ni-20Co-12Cr-4Al (wt.%) and ZrO2-8 mol%Y2O3 were used as the sources of the alloy layer and ceramic layer, respectively. The laminated composite was generally destroyed within the ceramic layer when the interlaminar strength was determined, which revealed that the excellent interface bonding between the ceramic layer and the alloy layer. The obvious diffusion interfaces between the ceramic and alloy layers were readily detected, which was favorable to the mechanical properties of the laminated composite. In the heat treatment process, the diffusion of the flaws within the ceramic layer and/or alloy layer to the interface between the ceramic layer and alloy layer was easier compared with the occurrence of interlaminar diffusion. It was confirmed by the X-ray diffractometer that the reaction of the ceramic layer with alloy layer was simple physical diffusion. The tensile strength of the laminated composite increased first and then decreased as the heat treatment time increased, which was attributed to the mutual reaction of the increase in the relative density with the formation of the flaws located at the interface.

  1. Multiadaptive Bionic Wavelet Transform: Application to ECG Denoising and Baseline Wandering Reduction

    Directory of Open Access Journals (Sweden)

    Mohammad B. Shamsollahi

    2007-01-01

    Full Text Available We present a new modified wavelet transform, called the multiadaptive bionic wavelet transform (MABWT, that can be applied to ECG signals in order to remove noise from them under a wide range of variations for noise. By using the definition of bionic wavelet transform and adaptively determining both the center frequency of each scale together with the T-function, the problem of desired signal decomposition is solved. Applying a new proposed thresholding rule works successfully in denoising the ECG. Moreover by using the multiadaptation scheme, lowpass noisy interference effects on the baseline of ECG will be removed as a direct task. The method was extensively clinically tested with real and simulated ECG signals which showed high performance of noise reduction, comparable to those of wavelet transform (WT. Quantitative evaluation of the proposed algorithm shows that the average SNR improvement of MABWT is 1.82 dB more than the WT-based results, for the best case. Also the procedure has largely proved advantageous over wavelet-based methods for baseline wandering cancellation, including both DC components and baseline drifts.

  2. Numerical Analysis of Hydrodynamics for Bionic Oscillating Hydrofoil Based on Panel Method.

    Science.gov (United States)

    Xue, Gang; Liu, Yanjun; Zhang, Muqun; Ding, Hongpeng

    2016-01-01

    The kinematics model based on the Slender-Body theory is proposed from the bionic movement of real fish. The Panel method is applied to the hydrodynamic performance analysis innovatively, with the Gauss-Seidel method to solve the Navier-Stokes equations additionally, to evaluate the flexible deformation of fish in swimming accurately when satisfying the boundary conditions. A physical prototype to mimic the shape of tuna is developed with the revolutionized technology of rapid prototyping manufacturing. The hydrodynamic performance for rigid oscillating hydrofoil is analyzed with the proposed method, and it shows good coherence with the cases analyzed by the commercial software Fluent and the experimental data from robofish. Furthermore, the hydrodynamic performance of coupled hydrofoil, which consisted of flexible fish body and rigid caudal fin, is analyzed with the proposed method. It shows that the caudal fin has great influence on trailing vortex shedding and the phase angle is the key factor on hydrodynamic performance. It is verified that the shape of trailing vortex is similar to the image of the motion curve at the trailing edge as the assumption of linear vortex plane under the condition of small downwash velocity. The numerical analysis of hydrodynamics for bionic movement based on the Panel method has certain value to reveal the fish swimming mechanism. PMID:27578959

  3. [Design of plant leaf bionic camouflage materials based on spectral analysis].

    Science.gov (United States)

    Yang, Yu-Jie; Liu, Zhi-Ming; Hu, Bi-Ru; Wu, Wen-Jian

    2011-06-01

    The influence of structure parameters and contents of plant leaves on their reflectance spectra was analyzed using the PROSPECT model. The result showed that the bionic camouflage materials should be provided with coarse surface and spongy inner structure, the refractive index of main content must be close to that of plant leaves, the contents of materials should contain chlorophyll and water, and the content of C-H bond must be strictly controlled. Based on the analysis above, a novel camouflage material, which was constituted by coarse transparent waterproof surface, chlorophyll, water and spongy material, was designed. The result of verifiable experiment showed that the reflectance spectra of camouflage material exhibited the same characteristics as those of plant leaves. The similarity coefficient of reflectance spectrum of the camouflage material and camphor leaves was 0.988 1, and the characteristics of camouflage material did not change after sunlight treatment for three months. The bionic camouflage material, who exhibited a high spectral similarity with plant leaves and a good weather resistance, will be an available method for reconnaissance of hyperspectral imaging hopefully. PMID:21847955

  4. High orientation of long chain branched poly (lactic acid) with enhanced blood compatibility and bionic structure.

    Science.gov (United States)

    Li, Zhengqiu; Ye, Lin; Zhao, Xiaowen; Coates, Phil; Caton-Rose, Fin; Martyn, Michasel

    2016-05-01

    Highly oriented poly (lactic acid) (PLA) with bionic microgrooves was fabricated through solid hot drawing technology for further improving the mechanical properties and blood biocompatibility of PLA. In order to enhance the melt strength and thus obtain high orientation degree, long chain branched PLA was prepared at first through a two-step ring-opening reaction during processing. Linear viscoelasticity combined with branch-on-branch model was used to predict probable compositions and chain topologies of the products, and it was found that the molecular weight of PLA increased and topological structures with star like chain with three arms and tree-like chain with two generations formed during reactive processing, and consequently draw ratio as high as1200% can be achieved during the subsequent hot stretching. With the increase of draw ratio, the tensile strength and orientation degree of PLA increased dramatically. Long chain branching and orientation could significantly enhance the blood compatibility of PLA by prolonging clotting time and decreasing platelet activation. Microgrooves can be observed on the surface of the oriented PLA which were similar to the intimal layer of blood vessel, and such bionic structure resulted from the formation of the oriented shish kebab-like crystals along the draw direction.

  5. Mapping of bionic array electric field focusing in plasmid DNA-based gene electrotransfer.

    Science.gov (United States)

    Browne, C J; Pinyon, J L; Housley, D M; Crawford, E N; Lovell, N H; Klugmann, M; Housley, G D

    2016-04-01

    Molecular medicine through gene therapy is challenged to achieve targeted action. This is now possible utilizing bionic electrode arrays for focal delivery of naked (plasmid) DNA via gene electrotransfer. Here, we establish the properties of array-based electroporation affecting targeted gene delivery. An array with eight 300 μm platinum ring electrodes configured as a cochlear implant bionic interface was used to transduce HEK293 cell monolayers with a plasmid-DNA green fluorescent protein (GFP) reporter gene construct. Electroporation parameters were pulse intensity, number, duration, separation and electrode configuration. The latter determined the shape of the electric fields, which were mapped using a voltage probe. Electrode array-based electroporation was found to require ~100 × lower applied voltages for cell transduction than conventional electroporation. This was found to be due to compression of the field lines orthogonal to the array. A circular area of GFP-positive cells was created when the electrodes were ganged together as four adjacent anodes and four cathodes, whereas alternating electrode polarity created a linear area of GFP-positive cells. The refinement of gene delivery parameters was validated in vivo in the guinea pig cochlea. These findings have significant clinical ramifications, where spatiotemporal control of gene expression can be predicted by manipulation of the electric field via current steering at a cellular level.

  6. Numerical Analysis of Hydrodynamics for Bionic Oscillating Hydrofoil Based on Panel Method.

    Science.gov (United States)

    Xue, Gang; Liu, Yanjun; Zhang, Muqun; Ding, Hongpeng

    2016-01-01

    The kinematics model based on the Slender-Body theory is proposed from the bionic movement of real fish. The Panel method is applied to the hydrodynamic performance analysis innovatively, with the Gauss-Seidel method to solve the Navier-Stokes equations additionally, to evaluate the flexible deformation of fish in swimming accurately when satisfying the boundary conditions. A physical prototype to mimic the shape of tuna is developed with the revolutionized technology of rapid prototyping manufacturing. The hydrodynamic performance for rigid oscillating hydrofoil is analyzed with the proposed method, and it shows good coherence with the cases analyzed by the commercial software Fluent and the experimental data from robofish. Furthermore, the hydrodynamic performance of coupled hydrofoil, which consisted of flexible fish body and rigid caudal fin, is analyzed with the proposed method. It shows that the caudal fin has great influence on trailing vortex shedding and the phase angle is the key factor on hydrodynamic performance. It is verified that the shape of trailing vortex is similar to the image of the motion curve at the trailing edge as the assumption of linear vortex plane under the condition of small downwash velocity. The numerical analysis of hydrodynamics for bionic movement based on the Panel method has certain value to reveal the fish swimming mechanism.

  7. Progress in bionic information processing techniques for an electronic nose based on olfactory models

    Institute of Scientific and Technical Information of China (English)

    LI Guang; FU Jun; ZHANG Jia; ZHENG JunBao

    2009-01-01

    As a novel bionic analytical technique, an electronic nose, inspired by the mechanism of the biological olfactory system and integrated with modern sensing technology, electronic technology and pattern recognition technology, has been widely used in many areas. Moreover, recent basic research findings in biological olfaction combined with computational neuroscience promote its development both in methodology and application. In this review, the basic information processing principle of biological olfaction and artificial olfaction are summarized and compared, and four olfactory models and their applications to electronic noses are presented. Finally, a chaotic olfactory neural network is detailed and the utilization of several biologically oriented learning rules and its spatiotemporal dynamic prop-ties for electronic noses are discussed. The integration of various phenomena and their mechanisms for biological olfaction into an electronic nose context for information processing will not only make them more bionic, but also perform better than conventional methods. However, many problems still remain, which should be solved by further cooperation between theorists and engineers.

  8. Numerical Analysis of Hydrodynamics for Bionic Oscillating Hydrofoil Based on Panel Method

    Science.gov (United States)

    2016-01-01

    The kinematics model based on the Slender-Body theory is proposed from the bionic movement of real fish. The Panel method is applied to the hydrodynamic performance analysis innovatively, with the Gauss-Seidel method to solve the Navier-Stokes equations additionally, to evaluate the flexible deformation of fish in swimming accurately when satisfying the boundary conditions. A physical prototype to mimic the shape of tuna is developed with the revolutionized technology of rapid prototyping manufacturing. The hydrodynamic performance for rigid oscillating hydrofoil is analyzed with the proposed method, and it shows good coherence with the cases analyzed by the commercial software Fluent and the experimental data from robofish. Furthermore, the hydrodynamic performance of coupled hydrofoil, which consisted of flexible fish body and rigid caudal fin, is analyzed with the proposed method. It shows that the caudal fin has great influence on trailing vortex shedding and the phase angle is the key factor on hydrodynamic performance. It is verified that the shape of trailing vortex is similar to the image of the motion curve at the trailing edge as the assumption of linear vortex plane under the condition of small downwash velocity. The numerical analysis of hydrodynamics for bionic movement based on the Panel method has certain value to reveal the fish swimming mechanism. PMID:27578959

  9. Close-field electroporation gene delivery using the cochlear implant electrode array enhances the bionic ear.

    Science.gov (United States)

    Pinyon, Jeremy L; Tadros, Sherif F; Froud, Kristina E; Y Wong, Ann C; Tompson, Isabella T; Crawford, Edward N; Ko, Myungseo; Morris, Renée; Klugmann, Matthias; Housley, Gary D

    2014-04-23

    The cochlear implant is the most successful bionic prosthesis and has transformed the lives of people with profound hearing loss. However, the performance of the "bionic ear" is still largely constrained by the neural interface itself. Current spread inherent to broad monopolar stimulation of the spiral ganglion neuron somata obviates the intrinsic tonotopic mapping of the cochlear nerve. We show in the guinea pig that neurotrophin gene therapy integrated into the cochlear implant improves its performance by stimulating spiral ganglion neurite regeneration. We used the cochlear implant electrode array for novel "close-field" electroporation to transduce mesenchymal cells lining the cochlear perilymphatic canals with a naked complementary DNA gene construct driving expression of brain-derived neurotrophic factor (BDNF) and a green fluorescent protein (GFP) reporter. The focusing of electric fields by particular cochlear implant electrode configurations led to surprisingly efficient gene delivery to adjacent mesenchymal cells. The resulting BDNF expression stimulated regeneration of spiral ganglion neurites, which had atrophied 2 weeks after ototoxic treatment, in a bilateral sensorineural deafness model. In this model, delivery of a control GFP-only vector failed to restore neuron structure, with atrophied neurons indistinguishable from unimplanted cochleae. With BDNF therapy, the regenerated spiral ganglion neurites extended close to the cochlear implant electrodes, with localized ectopic branching. This neural remodeling enabled bipolar stimulation via the cochlear implant array, with low stimulus thresholds and expanded dynamic range of the cochlear nerve, determined via electrically evoked auditory brainstem responses. This development may broadly improve neural interfaces and extend molecular medicine applications.

  10. Design of a Robot End-Effector Grabbing Mechanism Based on a Bionic Snake Mouth

    Directory of Open Access Journals (Sweden)

    Fu Zhuang

    2013-03-01

    Full Text Available Inspired by the bite and swallowing function of a snake’s mouth, a robot end‐effector grabbing mechanism was designed. The grabbing movement is realized by the ‘bite’ function of the bionic snake mouth actuator, and the ‘swallowing’ function insures a continuous grip on the object. To implement the continuous grip function of the new robot end‐effector, the complex motion of a snake’s mouth is simplified into three basic movements based on the anatomy of a snake’s mouth and with a combination of bionics and engineering. The upper jaw consists of a double four‐bar linkage mechanism and the lower jaw mechanism implementing a lateral expansion function are the two elements of the robot end‐effector. The relationship model and the corresponding curves of the actuating force and gripping force are necessary to implement an open‐loop control of the robot end‐effector. Through analysis and simulation, linkage parameters are determined to implement the desired motion.

  11. Multiadaptive Bionic Wavelet Transform: Application to ECG Denoising and Baseline Wandering Reduction

    Directory of Open Access Journals (Sweden)

    Sayadi Omid

    2007-01-01

    Full Text Available We present a new modified wavelet transform, called the multiadaptive bionic wavelet transform (MABWT, that can be applied to ECG signals in order to remove noise from them under a wide range of variations for noise. By using the definition of bionic wavelet transform and adaptively determining both the center frequency of each scale together with the -function, the problem of desired signal decomposition is solved. Applying a new proposed thresholding rule works successfully in denoising the ECG. Moreover by using the multiadaptation scheme, lowpass noisy interference effects on the baseline of ECG will be removed as a direct task. The method was extensively clinically tested with real and simulated ECG signals which showed high performance of noise reduction, comparable to those of wavelet transform (WT. Quantitative evaluation of the proposed algorithm shows that the average SNR improvement of MABWT is 1.82 dB more than the WT-based results, for the best case. Also the procedure has largely proved advantageous over wavelet-based methods for baseline wandering cancellation, including both DC components and baseline drifts.

  12. Numerical Analysis of Hydrodynamics for Bionic Oscillating Hydrofoil Based on Panel Method

    Directory of Open Access Journals (Sweden)

    Gang Xue

    2016-01-01

    Full Text Available The kinematics model based on the Slender-Body theory is proposed from the bionic movement of real fish. The Panel method is applied to the hydrodynamic performance analysis innovatively, with the Gauss-Seidel method to solve the Navier-Stokes equations additionally, to evaluate the flexible deformation of fish in swimming accurately when satisfying the boundary conditions. A physical prototype to mimic the shape of tuna is developed with the revolutionized technology of rapid prototyping manufacturing. The hydrodynamic performance for rigid oscillating hydrofoil is analyzed with the proposed method, and it shows good coherence with the cases analyzed by the commercial software Fluent and the experimental data from robofish. Furthermore, the hydrodynamic performance of coupled hydrofoil, which consisted of flexible fish body and rigid caudal fin, is analyzed with the proposed method. It shows that the caudal fin has great influence on trailing vortex shedding and the phase angle is the key factor on hydrodynamic performance. It is verified that the shape of trailing vortex is similar to the image of the motion curve at the trailing edge as the assumption of linear vortex plane under the condition of small downwash velocity. The numerical analysis of hydrodynamics for bionic movement based on the Panel method has certain value to reveal the fish swimming mechanism.

  13. Principles of electromagnetic protection bionics and research of fault self-recovery mechanism

    Institute of Scientific and Technical Information of China (English)

    Yuan Liang; Man Menghua; Chang Xiaolong

    2014-01-01

    As we have borrowed the wisdom from biological neural network,the characteristic of interference-proof in information transferring process has been carefully studied. Our study includes the response of electrical-interference-proof circuit in electromagnetic environment,by means of bionics redesign. In this way, new principles,new technics and new ways are adopted to solve the unavoidable situations in traditional electro-magnet protection design. Based on the Boolean model,the complex bionic topological networks were firstly built and the charactoristics of degeneracy were analyzed,then the bidirectional actions between degeneracy in networks and the robustness of functions were proved in order to fill up the gap to deal with the need of interference-proof. Based on the creation of the neuron networks and the electrical synapses ’ charac-teristic of plasticity ,the impact of the distribution in the weight of synapse on the character of network self-recovery was studied afterwards so that the corresponding mechanism could be defined.

  14. Use of bionic inspired surfaces for aerodynamic drag reduction on motor vehicle body panels

    Institute of Scientific and Technical Information of China (English)

    Xiao-wen SONG; Guo-geng ZHANG; Yun WANG; Shu-gen HU

    2011-01-01

    Inspired by the successful applications of biological non-smoothness,we introduced bionic non-smooth surfaces as appendices into vehicle body design,aiming to further reduce aerodynamic drag.The size range of the non-smooth units with pits and grooves was determined according to our analysis with the mechanisms underlying non-smooth unit mediated aerodynamic drag reduction.The bionic non-smooth units reported here were designed to adapt the structure of a given vehicle body from the point of boundary layer control that reduces the burst and the loss of turbulent kinetic energy.The engine cover lid and vehicle body cap were individually treated with the non-smooth units,and the treated vehicles were subjected to aerodynamic drag coefficient simulation tests using the computational fluid dynamics (CFD) analysis method.The simulation results showed that,in comparison with smooth surfaces,properly designed non-smooth surfaces can have greater effects on drag reduction.The mechanism underlying drag reduction mediated by non-smooth surfaces was revealed by further analyses,in which the effects of non-smooth and smooth surfaces were directly compared.

  15. A Numerical Study on Pressure Drop in Microchannel Flow with Different Bionic Micro-Grooved Surfaces

    Institute of Scientific and Technical Information of China (English)

    Jing Cui; Yabo Fu

    2012-01-01

    The studies of bionics reveal that some aquatic animals and winged insects have developed an unsmoothed surface possessing good characteristics of drag reduction.In this paper,four types of bionic surfaces,placoid-shaped,V-shaped,riblet-shaped,and ridge-shaped grooved surfaces,are employed as the microchannel surfaces for the purpose of reducing pressure loss.Lattice Boltzmann Method (LBM),a new numerical approach on mescoscopic level,is used to conduct the numerical investigations.The results show that the micro-grooved surfaces possess the drag reduction performance.The existence of the vortices formed within the grooves not only decrease the shear force between fluid and wall but also minimize the contact area between fluid and walls,which can lead to a reduction of pressure loss.The drag reduction coefficient (η) for these four types of micro-structures could be generalized as follows:ηridge-shaped > ηV-shaped > ηplacoid-shaped > ηriblet-shaped.Besides,the geometrical optimizations for the ridge-shaped grooves,which have the highest drag reduction performance,are performed as well.The results suggest that,for the purpose of drag reduction,the ridge-shaped grooves with smaller width to height ratio are recommended for the lower Reynolds number flow,while the ridge-shaped grooves with larger width to height ratio are be more suitable for the larger Reynolds number flow.

  16. 后仿生设计方法探析%Study on Methods of Post-Bionic Design

    Institute of Scientific and Technical Information of China (English)

    韩维生

    2011-01-01

    由Peel休闲椅案例分析入手,探寻其理论依据,通过对比现有几种仿生设计概念,分析了Peel休闲椅的设计特点,进而提出了新的概念——后仿生设计。结合分析后仿生设计案例,并融合木材解剖学、木材纹理强化技术和重组装饰材料设计制造技术等研究成果,进一步归纳出后仿生设计的方法,包括仿机械加工形态法、仿物理处理特征法、移植综合处理特征法及仿珍贵材料切面法,以便为今后开展后仿生设计的研究和应用提供理论基础。%Beginning with the case study on Peel chairs, it seek for its theory basis, and its characteristics were discussed by contrast with some existing bionic design concepts, and then a new concept of post-bionic design was proposed. Referring to some cases of post-bionic design and integrating with some results of wood anatomy, the technology of wood veneer imitation by texture intensify and reconstituted decoration lumber production, four methods for post-bionic design were further induced. These methods include machining shape simulation, physical treated characteristic simulation, integrally treated characteristic simulation and precious materials section simulation, which are the theory basis for the study and application of post-bionic design.

  17. 仿生非光滑理论在油气井工程中的应用%Application of bionic non-smooth theory in oil/gas well

    Institute of Scientific and Technical Information of China (English)

    黄少华

    2015-01-01

    The features of bionics are introduced in this paper along with the application of bionic non-smooth theory in drilling such as bionic rig,string and well.%本文重点介绍仿生学的特性,以及仿生非光滑理论在钻井工程中的应用,主要有仿生钻头,仿生钻柱,仿生井等.

  18. Application of Bionics in Vehicle Safety%仿生学方法在汽车设计上的应用

    Institute of Scientific and Technical Information of China (English)

    马春阳; 周伟; 杨林锋

    2013-01-01

    The authors introduced application of bionics in vehicle design from 3 aspects of shape bionic, function bionic and structure bionic. Through analog simulation, the authors researched design principle and thoughts of bionic concept car of safety-energy conservation and environmental protection, outstanding dynamical performance, low coefficient of windage resis-tance and high strength of framework of body by using automobile fish scale bionic shape software.%  分别从形态仿生、功能仿生和结构仿生三个方面,通过实例介绍了仿生学在汽车设计上的应用,并运用汽车鱼鳞仿生外形软件进行分析,通过模拟仿真,研究了安全节能环保、动力学效能出色、车身风阻系数小、车身构架强度高的仿生概念车的设计原理和思路。

  19. Experimental Observation of the Skeletal Adaptive Repair Mechanism and Bionic Topology Optimization Method

    Directory of Open Access Journals (Sweden)

    Kaysar Rahman

    2014-01-01

    Full Text Available Bone adaptive repair theory considers that the external load is the direct source of bone remodeling; bone achieves its maintenance by remodeling some microscopic damages due to external load during the process. This paper firstly observes CT data from the whole self-repairing process in bone defects in rabbit femur. Experimental result shows that during self-repairing process there exists an interaction relationship between spongy bone and enamel bone volume changes of bone defect, that is when volume of spongy bone increases, enamel bone decreases, and when volume of spongy bone decreases, enamel bone increases. Secondly according to this feature a bone remodeling model based on cross-type reaction-diffusion system influenced by mechanical stress is proposed. Finally, this model coupled with finite element method by using the element adding and removing process is used to simulate the self-repairing process and engineering optimization problems by considering the idea of bionic topology optimization.

  20. Bionic design of integrate structures%整合结构的仿生设计

    Institute of Scientific and Technical Information of China (English)

    汪久根; 张建忠; 薛峥

    2007-01-01

    Natural materials are formed with integral structures. Based on the achievements of our predecessors, the microstructures of some natural materials were decoded, and the configurations of integrated structures were interpreted with graded, porous, fractal and composite forms. The composition and spatial gradients of multiple kinds of physical parameters, which included elastic modulus, hardness, surface tension, stiffness, damping factor, density, heat conduction, electrical resistance factor, magnetic conductive factor, light penetration factor etc, are summarized. The 2-D and 3-D porous structures were analyzed, which had different types of voids and configurations. Then the fractal and gradient fractal rules were described with leaf structure. Moreover, the particulate and fibrous composite structures were developed with the combination of graded, porous and fractal rules. Finally, complex bionic design based on nets of blood vessels and nerves were proposed,which could be applied in structure design of mechanical parts.

  1. Phylogenetic position of sponges in early metazoan evolution and bionic applications of siliceous sponge spicules

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Sponges are the oldest and the simplest but not primitive multicellular animals. They represent the earliest evolutionary metazoan phylum still extant. It was a long and painful scientific process to position the most enigmatic and mysterious metazoan, the Porifera, into their correct phylogenetic place among the eukaryotes in general and multicellular animals in particular. As living fossils, sponges provide the best evidence for the early evolution of Metazoa. More recently, interest has been focused on the bionic applications of sponges' siliceous spicules, after the discovery of their unique structure and high fiber performance. In this review, the emergence of sponges, evolutionary novelties found in sponges, and the phylogenetic position of sponges in early metazoan evolution are highlighted. In addition, the pre-sent state of knowledge on silicatein-mediated "biosilica" formation in marine sponges, including the involvement of other molecules in silica metabolism and their potential application in nanobiotechnol-ogy and medicine, is given.

  2. Microwave assisted-semi bionic extraction of lignan compounds from Fructus Forsythiae by orthogonal design

    Institute of Scientific and Technical Information of China (English)

    TU Qiu-yun; ZHOU Chun-shan; TANG Jian-ping

    2008-01-01

    Microwave assisted-semi bionic extraction (MASBE) process for lignans from Fructus Forsythiae was studied. The influences of solvent pH value, microwave power, dosage of solvent and irradiation time were investigated. Optimum extracting parameters were determined by orthogonal experiments as follows: pH value of solvent at first extraction is 5.5-6.0, that at the second extraction is 7-8; microwave power is 700 W; mass ratio of Fructus Forsythiae to water is 1:12; irradiation time is 10 min, and extracting times is two. Under these optimal conditions, the yield of lignans reaches 0.364%. Compared with the conventionalextraction methods, the MASBE process has the advantages of high extraction rate, high extraction selectivity.

  3. Super-hydrophobic surfaces from a simple coating method: a bionic nanoengineering approach

    Science.gov (United States)

    Liu, Yuyang; Chen, Xianqiong; Xin, J. H.

    2006-07-01

    Inspired by the self-cleaning behaviour of lotus leaves in nature, we developed a simple coating method that can facilitate the bionic creation of super-hydrophobic surfaces on various substrates, thus providing a feasible way of fabricating super-hydrophobic surfaces for civil and industrial applications. Micro-nanoscale binary structured composite particles of silica/fluoropolymer were prepared using an emulsion-mediated sol-gel process, and then these composite particles were applied to various substrates to mimic the surface microstructures of lotus leaves. Super-hydrophobic surfaces with a water contact angle larger than 150° are obtained, and these super-hydrophobic surfaces are expected to have potential applications for rusting-resistant, anti-fog and self-cleaning treatments.

  4. Super-hydrophobic surfaces from a simple coating method: a bionic nanoengineering approach

    International Nuclear Information System (INIS)

    Inspired by the self-cleaning behaviour of lotus leaves in nature, we developed a simple coating method that can facilitate the bionic creation of super-hydrophobic surfaces on various substrates, thus providing a feasible way of fabricating super-hydrophobic surfaces for civil and industrial applications. Micro-nanoscale binary structured composite particles of silica/fluoropolymer were prepared using an emulsion-mediated sol-gel process, and then these composite particles were applied to various substrates to mimic the surface microstructures of lotus leaves. Super-hydrophobic surfaces with a water contact angle larger than 150 deg. are obtained, and these super-hydrophobic surfaces are expected to have potential applications for rusting-resistant, anti-fog and self-cleaning treatments

  5. Bionic Intelligent Optimization Algorithm Based on MMAS and Fish-Swarm Algorithm

    Directory of Open Access Journals (Sweden)

    Jingjing Yang

    2013-09-01

    Full Text Available With large number of ants, the ant colony algorithm would always take a long time or is rather difficult to find the optimal path from complex chapter path, further more, there exists a contradiction between stagnation, accelerated convergence and precocity. In this paper, we propose a new bionic optimization algorithm. The main idea of the algorithm is to introduce the horizons concept in the MMAS fish swarm algorithm, so it would take shorter time to find the optimal path with numerous ants, and the introduction of the concept of fish swarm algorithm congestion level would enable the ant colony find the path of global optimization with a strong crowding limit which avoids the emergence of local extreme and improves the accuracy and efficiency of the algorithm.

  6. The fabrication and property of hydrophilic and hydrophobic double functional bionic chitosan film.

    Science.gov (United States)

    Wang, Xiaohong; Xi, Zhen; Liu, Zhongxin; Yang, Liang; Cao, Yang

    2011-11-01

    A new kind of hydrophobic bionic chitosan film was fabricated by simulating the surface structure of lotus leaf. The titanium oxide nanotube array was used as templates. Scanning electron microscopy (SEM) images show that one side of this films have nano-scale rough surface with spherical protrusions alike the surface of lotus leaf. The diameter of the protrusions is about 100 nm, which is equal to diameter of the titanium oxide nanotube. The water contact angle of chitosan films is up to 120 degrees and it is hydrophobic. The other side of the film is flat and the contact angle is 70 degrees. That indicated that the hydrophilism of natural materials is connected with the surface structures. The double functional chitosan films, one side is hydrophilic, the other is hydrophobic, can be made by an easy method. This method is non-toxic and clean. The double functional chitosan film will improve the application of chitosan films in medicine. PMID:22413283

  7. Design and Mechanics Simulation of Bionic Lubrication System of Artificial Joints

    Institute of Scientific and Technical Information of China (English)

    S. H. Su; Z. K. Hua; J. H. Zhang

    2006-01-01

    We propose a new structure for artificial joints with a joint capsule which is designed to overcome the drawback of current prostheses that omit many functions of the lubricant and the joint capsule. The new structure is composed of three components:lubricant, artificial joint and artificial joint capsule. The lubricant sealed in the capsule can not only reduce the wear of the artificial joint but also prevents the wear particles leaking into the body. So unexpected reactions between the wear particles and body can be avoided completely. A three-dimensional (3-D) finite element analysis (FEA) model was created for a bionic knee joint with capsule. The stresses and their distribution in the artificial capsule were simulated with different thickness, loadings,and flexion angles. The results show that the maximum stress occurs in the area between the artificial joint and the capsule. The effects of capsule thickness and the angles of flexion on stress are discussed in detail.

  8. Super-hydrophobic surfaces from a simple coating method: a bionic nanoengineering approach

    Energy Technology Data Exchange (ETDEWEB)

    Liu Yuyang; Chen Xianqiong; Xin, J H [Nanotechnology Center, ITC, Hong Kong Polytechnic University, Hong Kong (China)

    2006-07-14

    Inspired by the self-cleaning behaviour of lotus leaves in nature, we developed a simple coating method that can facilitate the bionic creation of super-hydrophobic surfaces on various substrates, thus providing a feasible way of fabricating super-hydrophobic surfaces for civil and industrial applications. Micro-nanoscale binary structured composite particles of silica/fluoropolymer were prepared using an emulsion-mediated sol-gel process, and then these composite particles were applied to various substrates to mimic the surface microstructures of lotus leaves. Super-hydrophobic surfaces with a water contact angle larger than 150 deg. are obtained, and these super-hydrophobic surfaces are expected to have potential applications for rusting-resistant, anti-fog and self-cleaning treatments.

  9. Hemocompatibility research on the micro-structure surface of a bionic heart valve.

    Science.gov (United States)

    Ye, Xia; Wang, Ze; Zhang, Xianghua; Zhou, Ming; Cai, Lan

    2014-01-01

    In order to study how the geometric parameters and shape of the micro-structure surface of a bionic heart valve affects hemocompatibility, mastoid micro-structures with different periodic space were fabricated using a femtosecond laser on a polyurethane (PU) surface. The apparent contact angles of droplets on the micro-structure surfaces were measured to characterize their wettability. Then a series of blood compatibility experiments, including platelet adhesion, dynamic coagulation and hemolysis were completed. The experimental results showed that the micro-structure on the biomaterial surface helped improve its hydrophobicity and hemocompatibility. Also, the periodic space affected not only the hydrophobicity but also the hemocompatibility of the biomaterial. With the increasing of the periodic space, the apparent contact angle increased, the number of platelet adhesion decreased, the dynamic clotting time became longer and the hemolysis ratio reduced. In addition, the shape of the micro-structure also affected the hemocompatibility of the biomaterial.

  10. A DNA Structure-Based Bionic Wavelet Transform and Its Application to DNA Sequence Analysis

    Directory of Open Access Journals (Sweden)

    Fei Chen

    2003-01-01

    Full Text Available DNA sequence analysis is of great significance for increasing our understanding of genomic functions. An important task facing us is the exploration of hidden structural information stored in the DNA sequence. This paper introduces a DNA structure-based adaptive wavelet transform (WT – the bionic wavelet transform (BWT – for DNA sequence analysis. The symbolic DNA sequence can be separated into four channels of indicator sequences. An adaptive symbol-to-number mapping, determined from the structural feature of the DNA sequence, was introduced into WT. It can adjust the weight value of each channel to maximise the useful energy distribution of the whole BWT output. The performance of the proposed BWT was examined by analysing synthetic and real DNA sequences. Results show that BWT performs better than traditional WT in presenting greater energy distribution. This new BWT method should be useful for the detection of the latent structural features in future DNA sequence analysis.

  11. A bio-inspired test system for bionic above-knee prosthetic knees

    Science.gov (United States)

    Wang, Dai-Hua; Xu, Lei; Fu, Qiang; Yuan, Gang

    2013-04-01

    Recently, prosthetic knees in the developing stage are usually tested by installing them on amputees' stumps directly or on above-knee prostheses (AKPs) test platforms. Although amputees can fully provide the actual motion state of the thigh, immature prosthetic knees may hurt amputees. For AKPs test platforms, it just can partly simulate the actual motion state of the thigh with limitation of the motion curve of the thigh, the merits or demerits of newly developed bionic above-knee prosthetic knees cannot be accessed thoroughly. Aiming at the defects of two testing methods, this paper presents a bio-inspired AKPs test system for bionic above-knee prosthetic knees. The proposed bio-inspired AKPs test system is composed of a AKPs test platform, a control system, and a bio-inspired system. The AKPs test platform generates the motion of the thigh simulation mechanism (TSM) via two screw pairs with servo motors. The bio-inspired system includes the tester and the bio-inspired sensor wore by the tester. The control system, which is inspired by the bio-inspired system, generates the control command signal to move the TSM of the AKPs test platform. The bio-inspired AKPs test system is developed and experimentally tested with a commercially available prosthetic knee. The research results show that the bio-inspired AKPs test system can not only ensure the safety of the testers, but also track all kinds of the actual motion state of the thigh of the testers in real time.

  12. 形态/材料耦合仿生功能表面减阻特性及机制%Drag reduction characteristics and mechanism of bionic coupling functional surface caused by bionic form and elastic material

    Institute of Scientific and Technical Information of China (English)

    田丽梅; 可庆朋; 金娥; 李子源; 王银慈; 胡彦冰

    2015-01-01

    模仿海豚皮肤特殊结构的形态/材料耦合仿生功能表面可有效降低流体机械表面阻力,是流体机械实现节能减排的研究热点。该文采用流固耦合模拟技术,针对上述功能表面的面层材料及基底仿生形态2种耦合因素,各取3种不同的数值模型,对其减阻特性进行研究。计算结果表明:面层材料的弹性模量及基底仿生形态的间距对其减阻特性影响较大;面层材料的弹性模量越小,其顺应流体介质的能力越强,减阻效果越好;基底仿生形态的间距对于黏性阻力的影响效果显著,当间距为2 mm时,其减阻效果最好。减阻机制主要体现为:仿生耦合功能表面面层材料的弹性变形导致其实际流固接触界面与流固耦合界面产生分离,使其表面速度梯度降低,从而实现表面摩擦阻力的降低。%In the present study, a drag reduction on bionic surface originally inspired by the dolphin skin was designed and constructed. Two factors are coupled together with this bionic surface, they are bionic form processed on the basal rigid material and elastic surface material coupling on the bionic form. Such surface was called form/elastic material bionic coupling functional surface (BCFS) in this paper. The BCFS has been used in the impeller surface of centrifugal pump and proved to have the function of drag reduction. However, because of the limitation of existing test equipment, the drag reduction characteristics and mechanism of such BCFS can’t be revealed effectively. As such it greatly affects the wide application of the BCFS. Thanks to the gradually maturing fluid-structure coupling simulation technology, it makes the fluid control research by the BCFS possible. The two-way fluid-structure coupling simulation method was used under the ANSYS-Workbench platform to study the characteristics of drag reduction affected by the two coupling factors: elastic modulus of elastic surface

  13. A novel in situ device based on a bionic piezoelectric actuator to study tensile and fatigue properties of bulk materials

    International Nuclear Information System (INIS)

    In this work, a miniaturized device based on a bionic piezoelectric actuator was developed to investigate the static tensile and dynamic fatigue properties of bulk materials. The device mainly consists of a bionic stepping piezoelectric actuator based on wedge block clamping, a pair of grippers, and a set of precise signal test system. Tensile and fatigue examinations share a set of driving system and a set of signal test system. In situ tensile and fatigue examinations under scanning electron microscope or metallographic microscope could be carried out due to the miniaturized dimensions of the device. The structure and working principle of the device were discussed and the effects of output difference between two piezoelectric stacks on the device were theoretically analyzed. The tensile and fatigue examinations on ordinary copper were carried out using this device and its feasibility was verified through the comparison tests with a commercial tensile examination instrument

  14. A novel in situ device based on a bionic piezoelectric actuator to study tensile and fatigue properties of bulk materials

    Science.gov (United States)

    Wang, Shupeng; Zhang, Zhihui; Ren, Luquan; Zhao, Hongwei; Liang, Yunhong; Zhu, Bing

    2014-06-01

    In this work, a miniaturized device based on a bionic piezoelectric actuator was developed to investigate the static tensile and dynamic fatigue properties of bulk materials. The device mainly consists of a bionic stepping piezoelectric actuator based on wedge block clamping, a pair of grippers, and a set of precise signal test system. Tensile and fatigue examinations share a set of driving system and a set of signal test system. In situ tensile and fatigue examinations under scanning electron microscope or metallographic microscope could be carried out due to the miniaturized dimensions of the device. The structure and working principle of the device were discussed and the effects of output difference between two piezoelectric stacks on the device were theoretically analyzed. The tensile and fatigue examinations on ordinary copper were carried out using this device and its feasibility was verified through the comparison tests with a commercial tensile examination instrument.

  15. A novel in situ device based on a bionic piezoelectric actuator to study tensile and fatigue properties of bulk materials

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Shupeng; Zhang, Zhihui, E-mail: zhzh@jlu.edu.cn; Ren, Luquan; Liang, Yunhong [The Key Laboratory of Engineering Bionics (Ministry of Education) and the College of Biological and Agricultural Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025 (China); Zhao, Hongwei [College of Mechanical Science and Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025 (China); Zhu, Bing [College of Automotive Engineering, Jilin University (Nanling Campus), 5988 Renmin Street, Changchun 130025 (China)

    2014-06-15

    In this work, a miniaturized device based on a bionic piezoelectric actuator was developed to investigate the static tensile and dynamic fatigue properties of bulk materials. The device mainly consists of a bionic stepping piezoelectric actuator based on wedge block clamping, a pair of grippers, and a set of precise signal test system. Tensile and fatigue examinations share a set of driving system and a set of signal test system. In situ tensile and fatigue examinations under scanning electron microscope or metallographic microscope could be carried out due to the miniaturized dimensions of the device. The structure and working principle of the device were discussed and the effects of output difference between two piezoelectric stacks on the device were theoretically analyzed. The tensile and fatigue examinations on ordinary copper were carried out using this device and its feasibility was verified through the comparison tests with a commercial tensile examination instrument.

  16. A novel in situ device based on a bionic piezoelectric actuator to study tensile and fatigue properties of bulk materials.

    Science.gov (United States)

    Wang, Shupeng; Zhang, Zhihui; Ren, Luquan; Zhao, Hongwei; Liang, Yunhong; Zhu, Bing

    2014-06-01

    In this work, a miniaturized device based on a bionic piezoelectric actuator was developed to investigate the static tensile and dynamic fatigue properties of bulk materials. The device mainly consists of a bionic stepping piezoelectric actuator based on wedge block clamping, a pair of grippers, and a set of precise signal test system. Tensile and fatigue examinations share a set of driving system and a set of signal test system. In situ tensile and fatigue examinations under scanning electron microscope or metallographic microscope could be carried out due to the miniaturized dimensions of the device. The structure and working principle of the device were discussed and the effects of output difference between two piezoelectric stacks on the device were theoretically analyzed. The tensile and fatigue examinations on ordinary copper were carried out using this device and its feasibility was verified through the comparison tests with a commercial tensile examination instrument.

  17. Synthesis of Bioactive Three-dimensional Silicon-oxide Nanofibrous Structures on the Silicon Substrate for Bionic Devices’ Fabrication

    OpenAIRE

    Candace Colpitts; Amirkianoosh Kiani

    2016-01-01

    Bionic devices are implants that replace biological functions that have been lost due to damaged or lost tissue. The challenge of this area is to find the appropriate materials to match the biocompatible criteria with the same mechanical and electrical performance. In this research, a new method is introduced for the enhance‐ ment of silicon biocompatibility by fabrication of a 3D nanofibrous layer on the silicon surface, induced by nanosecond laser pulses at a high repetition rate and power....

  18. An insect-inspired bionic sensor for tactile localization and material classification with state-dependent modulation

    OpenAIRE

    Luca Patanè; Volker Dürr

    2012-01-01

    Insects carry a pair of antennae on their head: multimodal sensory organs that serve a wide range of sensory-guided behaviors. During locomotion, antennae are involved in near-range orientation, for example in detecting, localizing, probing, and negotiating obstacles. Here we present a bionic, active tactile sensing system inspired by insect antennae. It comprises an actuated elastic rod equipped with a terminal acceleration sensor. The measurement principle is based on the analysis of damped...

  19. Estimation of the Age and Amount of Brown Rice Plant Hoppers Based on Bionic Electronic Nose Use

    OpenAIRE

    Sai Xu; Zhiyan Zhou; Huazhong Lu; Xiwen Luo; Yubin Lan; Yang Zhang; Yanfang Li

    2014-01-01

    The brown rice plant hopper (BRPH), Nilaparvata lugens (Stal), is one of the most important insect pests affecting rice and causes serious damage to the yield and quality of rice plants in Asia. This study used bionic electronic nose technology to sample BRPH volatiles, which vary in age and amount. Principal component analysis (PCA), linear discrimination analysis (LDA), probabilistic neural network (PNN), BP neural network (BPNN) and loading analysis (Loadings) techniques were used to analy...

  20. Effects of bionic units on the fatigue wear of gray cast iron surface with different shapes and distributions

    Science.gov (United States)

    Chen, Zhi-kai; Lu, Shu-chao; Song, Xi-bin; Zhang, Haifeng; Yang, Wan-shi; Zhou, Hong

    2015-03-01

    To improve the fatigue wear resistance of gray cast iron (GCI), GCI samples were modified by a laser to imitate the unique structure of some soil animals alternating between soft and hard phases; the hard phase resists the deformation and the soft phase releases the deformation. Using the self-controlled fatigue wear test method, the fatigue wear behaviors of treated and untreated samples were investigated and compared experimentally. The results show that the bionic non-smooth surface obtains a beneficial effect on improving the fatigue wear resistance of a sample, and the fatigue wear resistance of the bionic sample assembled with reticulate units (60°+0°), whose mass loss was reduced by 62%, was superior to the others. Meanwhile, a finite element (FE) was used to simulate the compression and the distributions of strain and stress on the non-smooth surface was inferred. From these results, we understood that the functions of the bionic unit such as reducing strain and stress, and also obstructing the closure and propagation of cracks were the main reasons for improving the fatigue wear property of GCI.

  1. Mechanism Interpretation of the Biological Brain Cooling and Its Inspiration on Bionic Engineering

    Institute of Scientific and Technical Information of China (English)

    Xu Xue; Jing Liu

    2011-01-01

    The brain is one of the most important organs in a biological body which can only work in a relatively stable temperature range. However, many environmental factors in biosphere would cause cerebral temperature fluctuations. To sustain and regulate the brain temperature, many mechanisms of biological brain cooling have been evolved, including Selective Brain Cooling (SBC), cooling through surface water evaporation, respiration, behavior response and using special anatomical appendages. This article is dedicated to present a summarization and systematic interpretation on brain cooling strategies developed in animals by classifying and comparatively analyzing each typical biological brain cooling mechanism from the perspective of bio-heat transfer. Meanwhile, inspirations from such cooling in nature were proposed for developing advanced bionic engineering technologies especially with two focuses on therapeutic hypothermia and computer chip cooling areas. It is expected that many innovations can be achieved along this way to find out new cooling methodologies for a wide variety of industrial applications which will be highly efficient, energy saving, flexible or even intelligent.

  2. Can Quick Release Experiments Reveal the Muscle Structure? A Bionic Approach

    Institute of Scientific and Technical Information of China (English)

    D. F. B. Haeufle; M. Günther; R. Blickhan; S. Schmitt

    2012-01-01

    The goal of this study was to understand the macroscopic mechanical structure and function of biological muscle with respect to its dynamic role in the contraction.A recently published muscle model,deriving the hyperbolic force-velocity relation from first-order mechanical principles,predicts different force-velocity operating points for different load situations.With anew approach,this model could be simplified and thus,transferred into a numerical simulation and a hardware experiment.Two types of quick release experiments were performed in simulation and with the hardware setup,which represent two extreme cases of the contraction dynamics:against a constant force (isotonic) and against an inertial mass.Both experiments revealed hyperbolic or hyperbolic-like force-velocity relations.Interestingly,the analytical model not only predicts these extreme cases,but also additionally all contraction states in between.It was possible to validate these predictions with the numerical model and the hardware experiment.These results prove that the origin of the hyperbolic force-velocity relation can be mechanically explained on a macroscopic level by the dynamical interaction of three mechanical elements.The implications for the interpretation of biological muscle experiments and the realization of muscle-like bionic actuators are discussed.

  3. Unifying inflation with late-time acceleration by a BIonic system

    International Nuclear Information System (INIS)

    We propose a cosmological model that unifies inflation, deceleration and acceleration phases of expansion history by a BIonic system. At the beginning, there are k black fundamental strings that transited to the BIon configuration at a given corresponding point. Here, two coupled universes, brane and antibrane, are created interacting each other through a wormhole and inflate. With decreasing temperature, the energy of this wormhole flows into the universe branes and leads to inflation. After a short time, the wormhole evaporates, the inflation ends and a deceleration epoch starts. By approaching the brane and antibrane universes together, a tachyon is born, grows and causes the creation of a new wormhole. At this time, the brane and antibrane universes result connected again and the late-time acceleration era of the universe begins. We compare our model with previous unified phantom models and observational data obtaining some cosmological parameters like temperature in terms of time. We also find that deceleration parameter is negative during inflation and late-time acceleration epochs, while it is positive during the deceleration era. This means that the model is consistent, in principle, with cosmological observations

  4. Bionic Ears: Their Development and Future Advances Using Neurotrophins and Inherently Conducting Polymers

    Directory of Open Access Journals (Sweden)

    Graeme M. Clark

    2004-01-01

    Full Text Available The development of the multiple-channel bionic ear for hearing and speech understanding in profoundly deaf people is the result of integrating biological and physical sciences with engineering. It is the first clinically successful restoration of sensory and brain function, and brings electronic technology into a direct functional relationship with human consciousness. It presently transmits essential place and coarse temporal information for the coding of frequency, but the fine temporal and place excitation of groups of nerve fibres is inadequate for high-fidelity sound. This is required for adequate musical appreciation and hearing in noise. Research has demonstrated that nerve growth factors preserve the peripheral processes of the auditory nerves so that an electrode array placed close to these fibres could produce this fine temporal and spatial coding. The nerve growth factors can be incorporated into inherently conducting polymers that are part of the array so the peripheral processes can be preserved at the same time as they are electrically stimulated.

  5. Fuzzy-GA PID controller with incomplete derivation and its application to intelligent bionic artificial leg

    Institute of Scientific and Technical Information of China (English)

    谭冠政; 李安平

    2003-01-01

    An optimal PID controller with incomplete derivation is proposed based on fuzzy inference and the geneticalgorithm, which is called the fuzzy-GA PID controller with incomplete derivation. It consists of the off-line part andthe on-line part. In the off-line part, by taking the overshoot, rise time, and settling time of system unit step re-sponse as the performance indexes and by using the genetic algorithm, a group of optimal PID parameters K*p , Ti* ,and Tj are obtained, which are used as the initial values for the on-line tuning of PID parameters. In the on-linepart, based on K; , Ti* , and T*d and according to the current system error e and its time derivative, a dedicatedprogram is written, which is used to optimize and adjust the PID parameters on line through a fuzzy inference mech-anism to ensure that the system response has optimal dynamic and steady-state performance. The controller has beenused to control the D. C. motor of the intelligent bionic artificial leg designed by the authors. The result of computersimulation shows that this kind of optimal PID controller has excellent control performance and robust performance.

  6. Unifying inflation with late-time acceleration by a BIonic system

    Directory of Open Access Journals (Sweden)

    Alireza Sepehri

    2015-07-01

    Full Text Available We propose a cosmological model that unifies inflation, deceleration and acceleration phases of expansion history by a BIonic system. At the beginning, there are k black fundamental strings that transited to the BIon configuration at a given corresponding point. Here, two coupled universes, brane and antibrane, are created interacting each other through a wormhole and inflate. With decreasing temperature, the energy of this wormhole flows into the universe branes and leads to inflation. After a short time, the wormhole evaporates, the inflation ends and a deceleration epoch starts. By approaching the brane and antibrane universes together, a tachyon is born, grows and causes the creation of a new wormhole. At this time, the brane and antibrane universes result connected again and the late-time acceleration era of the universe begins. We compare our model with previous unified phantom models and observational data obtaining some cosmological parameters like temperature in terms of time. We also find that deceleration parameter is negative during inflation and late-time acceleration epochs, while it is positive during the deceleration era. This means that the model is consistent, in principle, with cosmological observations.

  7. Unifying inflation with late-time acceleration by a BIonic system

    Energy Technology Data Exchange (ETDEWEB)

    Sepehri, Alireza, E-mail: alireza.sepehri@uk.ac.ir [Faculty of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman (Iran, Islamic Republic of); Rahaman, Farook, E-mail: rahaman@iucaa.ernet.in [Department of Mathematics, Jadavpur University, Kolkata 700032, West Bengal (India); Setare, Mohammad Reza, E-mail: rezakord@ipm.ir [Department of Science, Campus of Bijar, University of Kurdistan, Bijar (Iran, Islamic Republic of); Pradhan, Anirudh, E-mail: pradhan@iucaa.ernet.in [Department of Mathematics, Institute of Applied Sciences & Humanities, GLA University, Mathura-281 406, U.P. (India); Capozziello, Salvatore, E-mail: capozziello@na.infn.it [Dipartimento di Fisica, Universitá di Napoli “Federico II”, I-80126 Napoli (Italy); INFN Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Edificio G, I-80126 Napoli (Italy); Gran Sasso Science Institute (INFN), Viale F. Crispi, 7, I-67100 L' Aquila (Italy); Sardar, Iftikar Hossain, E-mail: iftikar.spm@gmail.com [Department of Mathematics, Jadavpur University, Kolkata 700032, West Bengal (India)

    2015-07-30

    We propose a cosmological model that unifies inflation, deceleration and acceleration phases of expansion history by a BIonic system. At the beginning, there are k black fundamental strings that transited to the BIon configuration at a given corresponding point. Here, two coupled universes, brane and antibrane, are created interacting each other through a wormhole and inflate. With decreasing temperature, the energy of this wormhole flows into the universe branes and leads to inflation. After a short time, the wormhole evaporates, the inflation ends and a deceleration epoch starts. By approaching the brane and antibrane universes together, a tachyon is born, grows and causes the creation of a new wormhole. At this time, the brane and antibrane universes result connected again and the late-time acceleration era of the universe begins. We compare our model with previous unified phantom models and observational data obtaining some cosmological parameters like temperature in terms of time. We also find that deceleration parameter is negative during inflation and late-time acceleration epochs, while it is positive during the deceleration era. This means that the model is consistent, in principle, with cosmological observations.

  8. Butterfly scales as bionic templates for complex ordered nanophotonic materials: A pathway to biomimetic plasmonics

    Science.gov (United States)

    Jakšić, Zoran; Pantelić, Dejan; Sarajlić, Milija; Savić-Šević, Svetlana; Matović, Jovan; Jelenković, Branislav; Vasiljević-Radović, Dana; Ćurčić, Srećko; Vuković, Slobodan; Pavlović, Vladimir; Buha, Jelena; Lačković, Vesna; Labudović-Borović, Milica; Ćurčić, Božidar

    2013-08-01

    In this paper we propose a possible use of butterfly scales as templates for ordered 2D or 3D nanophotonic materials, with complexity not easily reproducible by conventional micro/nanofabrication methods. Functionalization through laminar nanocompositing is utilized to impart novel properties to the biological scaffold. An extremely wide variability of butterfly scale forms, shapes, sizes and fine structures is observed in nature, many of them already possessing peculiar optical properties. Their nanophotonic functionalization ensures a large choice of forms and functions, including enhanced light localization, light and plasmon waveguiding and general metamaterial behavior, to mention a few. We show that one is able to achieve a combination of plasmonics and bionics, resulting in functionalities seldom if ever met in nature. As an illustration we have analyzed the photonic properties of the nanostructured scales on the wings of Purple Emperor butterflies Apatura ilia, Apatura iris and Sasakia charonda. Their intricate nanometer-sized structures produce remarkable ultraviolet-blue iridescence, spectrally and directionally narrow. We present our analysis of their plasmonic/nanophotonic functionalization including preliminary calculations and initial experimental results. As a simple example, we used radiofrequent sputtering to produce nanoaperture-based plasmonic structures at a fraction of the cost and necessary engineering efforts compared to the conventional top-down methods. We conclude that the described pathway to biomimetic plasmonics offers potentials for significant expansion of the nanophotonic and nanoplasmonic material toolbox.

  9. Bionic approach for the prevention of exit-site infections of percutaneous devices.

    Science.gov (United States)

    Großhauser, Johannes; Reiter, Katja; Große-Siestrup, Christian; Kikhney, Judith; Kertzscher, Ulrich; Affeld, Klaus

    2015-06-01

    Exit-site infections remain one of the main complications for percutaneous devices, such as catheters for peritoneal dialysis or drivelines for ventricular assist devices. Many efforts have been made to create a biological seal, yet without long-term success. This study investigates a new kind of percutaneous device which is coated with an extricable polymeric membrane. The bionic approach applies the naturally outwards directed growth of skin structures to technology: by pulling the protective membrane it slowly grows out of the body and a developing sulcus is exposed to dry air and an infection is avoided. In a feasibility study this kind of device was shown to reduce the rate of infection. To further investigate these devices, they were implanted in the skin of goats and observed for a period of more than 500 days. The membranes were pulled with a force of up to 2 N and the resulting movement was recorded. When being pulled, the membranes moved 0.4-0.9 mm per week, showing that the application of a continuously acting, defined force on the protective membrane causes the desired slow movement.

  10. Research on the image fusion and target extraction based on bionic compound eye system

    Science.gov (United States)

    Zhang, Shaowei; Hao, Qun; Song, Yong; Wang, Zihan; Zhang, Kaiyu; Zhang, Shiyu

    2015-08-01

    People attach more and more importance to bionic compound eye due to its advantages such as small volume, large field of view and sensitivity to high-speed moving objects. Small field of view and large volume are the disadvantages of traditional image sensor and in order to avoid these defects, this paper intends to build a set of compound eye system based on insect compound eye structure and visual processing mechanism. In the center of this system is the primary sensor which has high resolution ratio. The primary sensor is surrounded by the other six sensors which have low resolution ratio. Based on this system, this paper will study the target image fusion and extraction method by using plane compound eye structure. This paper designs a control module which can combine the distinguishing features of high resolution image with local features of low resolution image so as to conduct target detection, recognition and location. Compared with traditional ways, the way of high resolution in the center and low resolution around makes this system own the advantages of high resolution and large field of view and enables the system to detect the object quickly and recognize the object accurately.

  11. Unifying inflation with late-time acceleration by a BIonic system

    Science.gov (United States)

    Sepehri, Alireza; Rahaman, Farook; Setare, Mohammad Reza; Pradhan, Anirudh; Capozziello, Salvatore; Sardar, Iftikar Hossain

    2015-07-01

    We propose a cosmological model that unifies inflation, deceleration and acceleration phases of expansion history by a BIonic system. At the beginning, there are k black fundamental strings that transited to the BIon configuration at a given corresponding point. Here, two coupled universes, brane and antibrane, are created interacting each other through a wormhole and inflate. With decreasing temperature, the energy of this wormhole flows into the universe branes and leads to inflation. After a short time, the wormhole evaporates, the inflation ends and a deceleration epoch starts. By approaching the brane and antibrane universes together, a tachyon is born, grows and causes the creation of a new wormhole. At this time, the brane and antibrane universes result connected again and the late-time acceleration era of the universe begins. We compare our model with previous unified phantom models and observational data obtaining some cosmological parameters like temperature in terms of time. We also find that deceleration parameter is negative during inflation and late-time acceleration epochs, while it is positive during the deceleration era. This means that the model is consistent, in principle, with cosmological observations.

  12. Bionic optical imaging system with aspheric solid-liquid mixed variable-focus lens

    Science.gov (United States)

    Du, Jia-Wei; Wang, Xuan-Yin; Liang, Dan

    2016-02-01

    A bionic optical imaging system with an aspheric solid-liquid mixed variable-focus lens was designed and fabricated. The entire system mainly consisted of a doublet lens, a solid-liquid mixed variable-focus lens, a connecting part, and a CCD imaging device. To mimic the structure of the crystalline lens, the solid-liquid mixed variable-focus lens consisted of a polydimethylsiloxane (PDMS) lens, a polymethyl methacrylate lens, and the liquid of ethyl silicone oil. By pumping liquid in or out of the cavity using a microinjector, the curvatures of the front and rear surfaces of the PDMS lens were varied, resulting in a change of focal length. The overall structure of the system was presented, as well as a detailed description of the solid-liquid mixed variable-focus lens, material, and fabrication process. Under different injection volumes, the deformation of the PDMS lens was measured and simulated, pictures were captured, and the optical performance was analyzed in simulations and experiments. The focal length of the system ranged from 25.05 to 14.61 mm, and the variation of the diopter was 28.5D, which was larger than that of the human eye.

  13. Investigation on 3Dt wake flow structures of swimming bionic fish

    Institute of Scientific and Technical Information of China (English)

    G.-X.Shen; G.-K.Tan; G.-J.Lai

    2012-01-01

    A bionic experimental platform was designed for the purpose of investigating time accurate three-dimensional flow field,using digital particle image velocimetry (DSPIV).The wake behind the flapping trail of a robotic fish model was studied at high spatial resolution.The study was performed in a water channel.A robot fish model was designed and built.The model was fixed onto a rigid support framework using a cable-supporting method,with twelve stretched wires.The entire tail of the model can perform prescribed motions in two degrees of freedom,mainly in carangiform mode,by driving its afterbody and lunate caudal fin respectively The DSPIV system was set up to operate in a translational manner,measuring velocity field in a series of parallel slices.Phase locked measurements were repeated for a number of runs,allowing reconstruction of phase average flow field.Vortex structures with phase history of the wake were obtained.The study reveals some new and complex three-dimensional flow structures in the wake of the fish,including "reverse hairpin vortex" and "reverse Karman S-H vortex rings",allowing insight into physics of this complex flow.

  14. Investigation on 3D t wake flow structures of swimming bionic fish

    Science.gov (United States)

    Shen, G.-X.; Tan, G.-K.; Lai, G.-J.

    2012-10-01

    A bionic experimental platform was designed for the purpose of investigating time accurate three-dimensional flow field, using digital particle image velocimetry (DSPIV). The wake behind the flapping trail of a robotic fish model was studied at high spatial resolution. The study was performed in a water channel. A robot fish model was designed and built. The model was fixed onto a rigid support framework using a cable-supporting method, with twelve stretched wires. The entire tail of the model can perform prescribed motions in two degrees of freedom, mainly in carangiform mode, by driving its afterbody and lunate caudal fin respectively. The DSPIV system was set up to operate in a translational manner, measuring velocity field in a series of parallel slices. Phase locked measurements were repeated for a number of runs, allowing reconstruction of phase average flow field. Vortex structures with phase history of the wake were obtained. The study reveals some new and complex three-dimensional flow structures in the wake of the fish, including "reverse hairpin vortex" and "reverse Karman S-H vortex rings", allowing insight into physics of this complex flow.

  15. Bionic design for surface optimization combining hydrophilic and negative charged biological macromolecules.

    Science.gov (United States)

    Ran, Fen; Song, Haiming; Niu, Xiaoqin; Yang, Aimei; Nie, Shengqiang; Wang, Lingren; Li, Jie; Sun, Shudong; Zhao, Changsheng

    2014-06-01

    While polyethersulfone (PES) membrane represents a promising option for blood purification, the blood compatibility must be dramatically enhanced to meet today's ever-increasing demands for many emerging application. In this study, we report a bionic design for optimization and development of a modified PES membrane combining hydrophilic and negative charged biological macromolecules on its surface. The hydrophilic and ionic charged biological macromolecules sulfonated poly(styrene)-b-poly(methyl methacrylate)-b-poly-(styrene) (PSSMSS) and poly(vinyl pyrrolidone)-b-poly(methyl methacrylate)-b-poly-(vinyl pyrrolidone) were synthesized via reversible addition-fragmentation chain transfer polymerization and used together to modify PES membranes by blending method. A hydrophilic membrane surface with negative charged surface coating was obtained, imitating the hydrophilic and negatively charged structure feature of heparin. The modified PES membranes showed suppressed platelet adhesion, and a prolonged blood clotting time, and thereby improved blood compatibility. In addition, the blood clotting time of the modified membranes increased with the blended PSSMSS amounts increment, indicating that both the hydrophilic and negative charged groups play important roles in improving the blood compatibility of PES membranes.

  16. Elective amputation and bionic substitution restore functional hand use after critical soft tissue injuries

    Science.gov (United States)

    Aszmann, Oskar C.; Vujaklija, Ivan; Roche, Aidan D.; Salminger, Stefan; Herceg, Malvina; Sturma, Agnes; Hruby, Laura A.; Pittermann, Anna; Hofer, Christian; Amsuess, Sebastian; Farina, Dario

    2016-01-01

    Critical soft tissue injuries may lead to a non-functional and insensate limb. In these cases standard reconstructive techniques will not suffice to provide a useful outcome, and solutions outside the biological arena must be considered and offered to these patients. We propose a concept which, after all reconstructive options have been exhausted, involves an elective amputation along with a bionic substitution, implementing an actuated prosthetic hand via a structured tech-neuro-rehabilitation program. Here, three patients are presented in whom this concept has been successfully applied after mutilating hand injuries. Clinical tests conducted before, during and after the procedure, evaluating both functional and psychometric parameters, document the benefits of this approach. Additionally, in one of the patients, we show the possibility of implementing a highly functional and natural control of an advanced prosthesis providing both proportional and simultaneous movements of the wrist and hand for completing tasks of daily living with substantially less compensatory movements compared to the traditional systems. It is concluded that the proposed procedure is a viable solution for re-gaining highly functional hand use following critical soft tissue injuries when existing surgical measures fail. Our results are clinically applicable and can be extended to institutions with similar resources. PMID:27721419

  17. Bionic design. Its idea and present situation; Biotec design. Sono kangaekata to genjo

    Energy Technology Data Exchange (ETDEWEB)

    Oda, J. [Kanazawa University, Ishikawa (Japan). Faculty of Engineering

    1996-03-05

    This paper explains the idea of a bionic design and the present situation of its research. There are numerous subjects to learn from the structure and system of organisms as well as in the process of their generation, evolution and extinction, in connection with the design of artifacts. These subjects are classified into positions for developing new materials, new mechanisms/structures, and new systems or algorithmic models. In other words, they are the development of materials for self-repairing cracks and defects, development of micro-machines or robots from the moving mechanisms and the like of insects and micro-organisms, development of a mechanism for protecting a gigantic structures or systems through the use of an immunity system by antigen and antibody, and so on. The enamel of teeth is an apatite material with the hardness of 5 but actually provided with a strength comparable to the hardness of 6 to 7. Bamboo resists an external force by varying the distribution of vascular bundles in the thickness direction. Thus, the integration of software and hardware is the characteristic of biomaterials. 13 refs., 6 figs.

  18. Effects of laser parameters on the geometrical characteristics of peg-shaped bionic coupling unit

    Science.gov (United States)

    Zhang, Baoyu; Zhang, Zhihui; Liang, Yunhong; Yan, Qiongqiong; Ren, Luquan

    2014-12-01

    Peg-shaped bionic coupling unit (PBCU) processed by pulse laser is effective in anti-adhesion, anti-drag, anti-wear and anti-fatigue application. To obtain desired structural and morphological characteristics of the PBCU for industrial manufacturing, selection of proper processing parameters gradually becomes a growing important problem. Traditionally, the procedure of parameter selecting is often cost-plus and time-consuming. In this work, a statistical analysis of fabricating PBCU on the surface of medium carbon steel was conducted. The laser processing parameters utilized in the experiment and analysis are peak power 4-8 kW, pulse duration 6-16 ms and defocusing amount 6-10 mm. A series of mathematical models regarding the relationship between geometrical characteristics of PBCU and laser processing parameters were developed and checked. The results indicate that the developed models can be adequately used to control the structural and morphological characteristics of PBCU within the scope of analysis. Based on the models, the formation mechanism of the structural and morphological characteristics under different laser parameters were analyzed and discussed.

  19. Numerical simulation on drag reduction of revolution body through bionic riblet surface

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Numerical simulations of flow fields on the bionic riblet and the smooth revolution bodies were performed based on the SST k-ω turbulence model in order to explain the mechanisms of the skin friction drag reduction, base drag reduction on the riblet surface, and flow control behaviors of riblet surface near the wall. The simulation results show that the riblet surface arranged on the rearward of the revolution body can reduce the skin friction drag by 8.27%, the base drag by 9.91% and the total drag by 8.59% at Ma number 0.8. The riblet surface reduces the skin friction drag by reducing the velocity gradient and turbulent intensity, and reduces the base drag by weakening the pumping action on the dead water region which behind the body of revolution caused by the external flow. The flow control behavior on boundary layer shows that the riblet surface can cut the low-speed flow near the wall effectively, and restrain the low-speed flow concentrating in span direction, thus weaken the instability of the low speed steaks produced by turbulent flow bursting.

  20. 主动型仿生踝关节假肢的设计%Design of powered bionic ankle prosthesis

    Institute of Scientific and Technical Information of China (English)

    赵改平; 曹帅; 尚昆; 阮超; 赵伟钦; 王祯祥; 郭丹

    2011-01-01

    背景:与髋、膝关节假肢设计相对比较成熟的技术相比,踝关节作为人体下肢关节的重要组成部分,也是最为灵活的部分,一直以来研究都比较滞后,相关的假肢踝关节产品未能很好的满足假肢患者的需求.目的:从生物力学、解剖学和生理学角度出发,设计和研制出能在矢状面内做屈伸运动的主动型仿生踝关节假肢装置.方法:根据仿生学原理和人体踝关节在步态行走时的受力特点和生理功能,建立二自由度的主动型仿生踝关节的力学模型,设计假肢踝关节的机械结构与控制系统,其主要部件包括仿生踝关节系统、辅助装置、数据控制系统和数据采集系统.结果与结论:利用研制出的踝关节装置进行系统测试,使用正常人行走时的踝关节角度数据作为输入信号,以步进电机作为动力驱动实现模拟踝关节的运动,通过数据采集系统获得输出的角度数据.测试结果表明仿生踝关节能够跟随输入角度数据运动,实现了仿生踝关节跟随运动的预期目标.%BACKGROUND: Ankle prosthesis has been researched as a focus point for improving living quality of disabled persons suffers from lower limb.OBJECTIVE: To design and manufacture the powered bionic ankle prosthesis based on biomechanics, anatomy and physiology theories.METHODS: According to bionics principle, the stress characteristics and physiological functions of the human ankle joint during gait analysis, mechanics model of ankle prosthesis with two-degree-of-freedom motion is established and mechanical structure and control system of ankle prosthesis are designed. The bionic ankle prosthesis, which includes bionic ankle system, auxiliary devices, data control and data acquisition systems, can do flexion and extension in the sagittal plane.RESULTS AND CONCLUSION: A system testing was performed based on the ankle prosthesis device. The normal human ankle walking gait data as the input signal

  1. 截瘫步行器的仿生效果%Bionic effect of reciprocating gait orthosis

    Institute of Scientific and Technical Information of China (English)

    陈文远

    2011-01-01

    BACKGROUND: Reciprocating gait orthosis makes the paraplegia patients walking, but reciprocating gait orthosis can only perform walking rehabilitation training and simple walking, which was far from real walking function compensation.OBJECTIVE: To summarize and analyze construction features, action mechanism and bionic effect of reciprocating gait orthosis.METHODS: We retrieved PubMed Database and Wanfang Database for articles concerning features, bionic effect and clinical application of reciprocating gait orthosis published from January 1990 to December 2008. The key words were "reciprocation gait orthosis, walkabout, bionice". A total of 32 articles were researched.RESULTS AND CONCLUSION: At present, unpowered reciprocating gait orthosis has been extensively utilized , but it can only perform walking rehabilitation training and simple walking, which was far from real walking function compensation for paraplegia patients. The bionic effects of reciprocation gait orthosis and walkabout were poor; gait lacked fidelity; physical ability was greatly consumed. However, the gait orthosis that requires outer energy for supplement can overcome the disadvantage of unpowered gait orthosis. With the wide usage of artificial intellectual technology in robot and many industry fields, its development can provide gait orthosis that has good function, safety, reliability, and bionics.%背景:截瘫步行器的临床应用,使截瘫患者重建步行功能成为可能,但截瘫步行器只为进行步行康复训练及简单的行走,距离真正意义上的步行功能代偿相差还很远.目的:对目前几种截瘫步行器的结构特点、作用机制及仿生效果进行归纳、分析.方法:应用计算机检索1990-01/2008-12 PubMed数据库及万方数据库有关截瘫步行器的特点、仿生效果及临床应用方面的相关文献,英文检索词"reciprocation gait orthosis,walkabout,bionice",中文检索词"截瘫步行器,仿生".检索文献量总计32篇.

  2. The Design of Bionic Left Ventricular Auxiliary Pump%仿生左心室辅助血泵设计

    Institute of Scientific and Technical Information of China (English)

    金恒林; 胡晓兵; 杜磊

    2015-01-01

    This paper reports a novel design of bionic left ventricular auxiliary pump, and the characteristic is that elastic diaphragm of pump driven by hydraulic, having smooth, reliable blood supply, can prevent blood clots, can use the flow sensor, pressure sensor detection showing the blood pressure and blood volume at the inlet and outlet of the pump. The pump can go with heart rate synchronization or asynchronous auxiliary by the R wave of human body’s ECG. The design goal is realization of bionic throb. Through the animal experiment, the blood pressure waveforms are close to expectations, stable flow can stroke according to the set value, which prove that the pump can meet the requirement for heart disease patients for bionic left ventricular assistant.%该文设计一种新型的仿生左心室辅助血泵,其特点是采用液压驱动弹性隔膜结构,具有供血平稳、可靠,有利于防止血栓;可以利用流量传感器、压力传感器检测显示泵进、出口的血压和泵血量。该血泵可以根据人体心电R波实现与人体心率同步辅助或非同步辅助。设计目标是实现仿生搏动。动物实验中,血压波形逼近期望值,流量能够按照设定值稳定搏出,证明该泵能满足对心脏病人进行仿生左心室辅助的要求。

  3. The Design of Bionic Left Ventricular Auxiliary Pump%仿生左心室辅助血泵设计

    Institute of Scientific and Technical Information of China (English)

    金恒林; 胡晓兵; 杜磊

    2015-01-01

    该文设计一种新型的仿生左心室辅助血泵,其特点是采用液压驱动弹性隔膜结构,具有供血平稳、可靠,有利于防止血栓;可以利用流量传感器、压力传感器检测显示泵进、出口的血压和泵血量。该血泵可以根据人体心电R波实现与人体心率同步辅助或非同步辅助。设计目标是实现仿生搏动。动物实验中,血压波形逼近期望值,流量能够按照设定值稳定搏出,证明该泵能满足对心脏病人进行仿生左心室辅助的要求。%This paper reports a novel design of bionic left ventricular auxiliary pump, and the characteristic is that elastic diaphragm of pump driven by hydraulic, having smooth, reliable blood supply, can prevent blood clots, can use the flow sensor, pressure sensor detection showing the blood pressure and blood volume at the inlet and outlet of the pump. The pump can go with heart rate synchronization or asynchronous auxiliary by the R wave of human body’s ECG. The design goal is realization of bionic throb. Through the animal experiment, the blood pressure waveforms are close to expectations, stable flow can stroke according to the set value, which prove that the pump can meet the requirement for heart disease patients for bionic left ventricular assistant.

  4. 论艺术与仿生学的结缘%On the combination of art and bionics

    Institute of Scientific and Technical Information of China (English)

    张宏梁

    2001-01-01

    建筑仿生、工艺仿生以及人工智能艺术,是艺术与仿生学结缘的三个突出的方面。对之所进行的边缘性研究,旨在用艺术与科学相结合的方法,仿照某些生物的特征、机能,制作新的建筑物、艺术品、工艺品和具有独特审美价值的工业产品。艺术与仿生学的结缘是艺术起源观中的摹仿说在新的科学技术发展时代的一个质的飞跃。在技术美学领域,对艺术与仿生学的结缘尤为重视。%The application of bionics in architecture and industrial art and artificial intelligence are mostimportant areas in which art and bionics are combined. The interdisciplinary research in these areas isaimed at producing new architectural works, art items and industrial products with unique aesthetic valuethrough a combination of art and science and modeling features and functions of animate objects. The com-bination of art and bionics presents an essential step forward of the imitation theory in the study of the ori-gin of art in the new era of highly developed technology and science. This combination is particularly sig-nificant for technological aesthetics.

  5. Affordable self-sufficient, bionic buildings. The necessity of thermal inertia; Betaalbare autarkische, bionische gebouwen. Thermische traagheid noodzakelijk

    Energy Technology Data Exchange (ETDEWEB)

    Schmitz, H. [Afdeling Binnenmilieu en Energie, Arcadis Bouw en Vastgoed, Den Haag (Netherlands)

    2004-03-01

    An overview is given of the development of low-pressure phase change material (PCM) induction units, which are fundamental elements of self-sufficient and bionic construction. Applications of PCM in buildings for climatization are discussed. [Dutch] Het samenwerkingsverband tussen verschillende bedrijven heeft de ontwikkeling van lagedruk, PCM (Phase Change Materials) inductie-units tot gevolg gehad. Deze units vormen een fundamenteel bestanddeel van het autarkisch en bionisch bouwen, dat zo mogelijk kan leiden tot autarkie (zelfvoorzienendheid op energiegebied). Wat zijn de toepassingen van PCM in gebouwen voor de ruimteklimatisering?.

  6. Design and development of a ferroelectric micro photo detector for the bionic eye

    Science.gov (United States)

    Song, Yang

    Driven by no effective therapy for Retinitis Pigmentosa and Age Related Macular Degeneration, artificial vision through the development of an artificial retina that can be implanted into the human eye, is being addressed by the Bionic Eye. This dissertation focuses on the study of a photoferroelectric micro photo detector as an implantable retinal prosthesis for vision restoration in patients with above disorders. This implant uses an electrical signal to trigger the appropriate ocular cells of the vision system without resorting to wiring or electrode implantation. The research work includes fabrication of photoferroelectric thin film micro detectors, characterization of these photoferroelectric micro devices as photovoltaic cells, and Finite Element Method (FEM) modeling of the photoferroelectrics and their device-neuron interface. A ferroelectric micro detector exhibiting the photovoltaic effect (PVE) directly adds electrical potential to the neuron membrane outer wall at the focal adhesion regions. The electrical potential then generates a retinal cell membrane potential deflection through a newly developed Direct-Electric-Field-Coupling (DEFC) model. This model is quite different from the traditional electric current model because instead of current directly working on the cell membrane, the PVE current is used to generate a localized high electric potential in the focal adhesion region by working together with the anisotropic high internal impedance of ferroelectric thin films. General electrodes and silicon photodetectors do not have such anisotropy and high impedance, and thus they cannot generate DEFC. This mechanism investigation is very valuable, because it clearly shows that our artificial retina works in a way that is totally different from the traditional current stimulation methods.

  7. 虚拟仿生手联合仿真研究%Study on Simulation of Virtual Bionic Hand

    Institute of Scientific and Technical Information of China (English)

    尚小晶; 吴忠伟; 徐成波

    2014-01-01

    According to the importance of rehabilitation engineering to the current lives of the people, Intelligent prosthesis as the research object, Adams software and Matlab / Simulink were combined to build bionic model, we use the fuzzy PID control algorithm to analysis the model, reduce unnecessary material and time cost in the procession of practical prosthesis physical design and improve the efficiency of design. Simulation results show that, the virtual bionic hand has a good ability of tracking and can corresponding the gesture stability.%根据目前康复医学工程对人们生活的重要意义,以智能假肢为研究对象,将 Adams 软件和 Matlab/ Simulink 相结合搭建仿生模型,采用模糊 PID 控制算法对仿生手模型进行分析,减少实际假肢物理样机设计过程中不必要的物资和时间耗费,提高设计效率。仿真实验表明,虚拟仿生手具有较好的跟踪能力,能够稳定的完成相应手势动作。

  8. Structural bionic design for high——speed machine tool working table based on distribution rules of leaf veins

    Institute of Scientific and Technical Information of China (English)

    XING DengHai; CHEN WuYi; ZHAO Ling; MA JianFeng

    2012-01-01

    High-speed machine tool working table restrains the machining accuracy and machining efficiency,so lightweight design of the table is an important issue.In nature,leaf has developed a plate structure that maximizes the surface-to-volume ratio.It can be seen as a plate structure stiffened by veins.Compared with a high-speed machine tool working table,leaf veins play a role of supporting part which is similar to that of stiffening ribs,and they can provide some new design ideas for lightweight design of the table.In this paper,distribution rules of leaf veins were investigated,and a structural bionic design for the table was achieved based on regulation of leaf veins.First,statistical analysis on geometric structure of leaf veins was carried out,and four distribution rules were obtained.Then,relevant mechanical models were developed and analyzed in finite element soft-ware.Based on the results from mechanical analysis on those relevant models,the four distribution rules were translated into the design rules and a structural bionic design for the working table was achieved.Both simulation and experimental verifications were carried out,and results showed that the average displacement of the working table was reduced by about 33.9%.

  9. Effect of thermal fatigue on the wear resistance of graphite cast iron with bionic units processed by laser cladding WC

    Science.gov (United States)

    Jing, Zhengjun; Zhou, Hong; Zhang, Peng; Wang, Chuanwei; Meng, Chao; Cong, Dalong

    2013-04-01

    Thermal fatigue and wear exist simultaneously during the service life of brake discs. Previous researchers only studied thermal fatigue resistance or abrasion resistance of compact graphite cast iron (CGI), rather than combining them together. In this paper, wear resistance after thermal fatigue of CGI was investigated basing on the principle of bionics, which was close to actual service condition of the brake discs. In the meanwhile, the effect of thermal fatigue on wear resistance was also discussed. Non-smooth bionic units were fabricated by laser cladding WC powder with different proportions (50 wt.%, 60 wt.%, 70 wt.%). Microstructure and microhardness of the units were investigated, and wear mass losses of the samples were also compared. The results indicate that thermal fatigue has a negative effect on the wear resistance. After the same thermal fatigue cycles times, the wear resistance of laser cladding WC samples is superior to that of laser remelting ones and their wear resistance enhances with the increase of WC content.

  10. Estimation of the age and amount of brown rice plant hoppers based on bionic electronic nose use.

    Science.gov (United States)

    Xu, Sai; Zhou, Zhiyan; Lu, Huazhong; Luo, Xiwen; Lan, Yubin; Zhang, Yang; Li, Yanfang

    2014-09-29

    The brown rice plant hopper (BRPH), Nilaparvata lugens (Stal), is one of the most important insect pests affecting rice and causes serious damage to the yield and quality of rice plants in Asia. This study used bionic electronic nose technology to sample BRPH volatiles, which vary in age and amount. Principal component analysis (PCA), linear discrimination analysis (LDA), probabilistic neural network (PNN), BP neural network (BPNN) and loading analysis (Loadings) techniques were used to analyze the sampling data. The results indicate that the PCA and LDA classification ability is poor, but the LDA classification displays superior performance relative to PCA. When a PNN was used to evaluate the BRPH age and amount, the classification rates of the training set were 100% and 96.67%, respectively, and the classification rates of the test set were 90.67% and 64.67%, respectively. When BPNN was used for the evaluation of the BRPH age and amount, the classification accuracies of the training set were 100% and 48.93%, respectively, and the classification accuracies of the test set were 96.67% and 47.33%, respectively. Loadings for BRPH volatiles indicate that the main elements of BRPHs' volatiles are sulfur-containing organics, aromatics, sulfur-and chlorine-containing organics and nitrogen oxides, which provide a reference for sensors chosen when exploited in specialized BRPH identification devices. This research proves the feasibility and broad application prospects of bionic electronic noses for BRPH recognition.

  11. A critical review of interfaces with the peripheral nervous system for the control of neuroprostheses and hybrid bionic systems.

    Science.gov (United States)

    Navarro, Xavier; Krueger, Thilo B; Lago, Natalia; Micera, Silvestro; Stieglitz, Thomas; Dario, Paolo

    2005-09-01

    Considerable scientific and technological efforts have been devoted to develop neuroprostheses and hybrid bionic systems that link the human nervous system with electronic or robotic prostheses, with the main aim of restoring motor and sensory functions in disabled patients. A number of neuroprostheses use interfaces with peripheral nerves or muscles for neuromuscular stimulation and signal recording. Herein, we provide a critical overview of the peripheral interfaces available and trace their use from research to clinical application in controlling artificial and robotic prostheses. The first section reviews the different types of non-invasive and invasive electrodes, which include surface and muscular electrodes that can record EMG signals from and stimulate the underlying or implanted muscles. Extraneural electrodes, such as cuff and epineurial electrodes, provide simultaneous interface with many axons in the nerve, whereas intrafascicular, penetrating, and regenerative electrodes may contact small groups of axons within a nerve fascicle. Biological, technological, and material science issues are also reviewed relative to the problems of electrode design and tissue injury. The last section reviews different strategies for the use of information recorded from peripheral interfaces and the current state of control neuroprostheses and hybrid bionic systems.

  12. 海龟柔性前肢仿生推进研究%Bionic Research on Turtle's Flexible Forelimb Propulsion

    Institute of Scientific and Technical Information of China (English)

    张铭钧; 刘晓白; 徐建安; 储定慧; 闫娜

    2011-01-01

    为探讨水翼法推进方式,进行了海龟柔性前肢仿生技术研究.基于水翼法运动解析,研究了海龟柔性水翼的弦向形变特征、反卡门涡街脱泻及斯特劳哈尔数等,推算出水翼尾涡脱泻的斯特劳哈尔数位于0.2~0.45之间,雷诺数位于3×102~3×104之间;根据海龟水翼粘弹本构特性,研制了半骼式仿生柔性水翼,并对其进行柔性形变和组织模态分析.通过水下仿生实验平台进行了半骼式柔性水翼和全骼式刚性水翼推进的直航、转艏性能对比实验,实验结果显示,虽然柔性水翼只有在较高ω1值拍动时的推进效率才高于刚性水翼,但其速度增长率却始终高于刚性水翼:并且随着ω1值的增长,柔性水翼对于样机速度减振方面的作用一直存在且越来越明显.实验研究结果为柔性水翼操纵与控制研究提供了技术基础.%In order to investigate the hydrofoil propulsion method, the bionic technology of the turtle's flexible forelimbs is studied. Based on the kinematical analysis of turtle hydrofoil, the chordwise deformation characteristics, the reverse Kurman vortex street shedding, and the Strouhal number of flexible hydrofoil are studied, and then it is calculated that the Strouhal number is between 0.2 and 0.45, the Reynolds number is from 3× 102 to 3× 104. According to the viscoelastic constitutive property of turtle hydrofoil, the half-iliac bionic flexible hydrofoil is developed, and its flexible deformation as well as tissue mode are analyzed. By use of the underwater bionic experimental sample, the direct navigation and yawing performance contrast tests of bionic sample with the half-iliac flexible hydrofoil and whole-iliac rigid hydrofoil are conducted respectively.The experiments' results show that, however the propulsion efficiency of flexible hydrofoil is higher than the rigid one only moving at the high value of ω1, the sample's acceleration when propelled by the flexible hydrofoil

  13. Macrophages promote benzopyrene-induced tumor transformation of human bronchial epithelial cells by activation of NF-κB and STAT3 signaling in a bionic airway chip culture and in animal models

    OpenAIRE

    Li, Encheng; Xu, Zhiyun; Zhao, Hui; Sun, Zhao; Wang, Lei; Guo, Zhe; Zhao, Yang; GAO, ZHANCHENG; Wang, Qi

    2015-01-01

    We investigated the role of macrophages in promoting benzopyrene (BaP)-induced malignant transformation of human bronchial epithelial cells using a BaP-induced tumor transformation model with a bionic airway chip in vitro and in animal models. The bionic airway chip culture data showed that macrophages promoted BaP-induced malignant transformation of human bronchial epithelial cells, which was mediated by nuclear factor (NF)-κB and STAT3 pathways to induce cell proliferation, colony formation...

  14. 半仿生技术在中药黄酮类成分提取中的应用进展%Progress in Semi-Bionic Extraction of Flavonoids from Traditional Chinese Medicinal Plants

    Institute of Scientific and Technical Information of China (English)

    杨姜德; 刘可越; 何明; 裘佳龄

    2015-01-01

    综述了黄酮类化合物的半仿生提取法。中草药有关半仿生提取方法包括半仿生提取法,半仿生提法醇提取法、微波辅助半仿生提取法、超声波辅助半仿生提取法、酶辅助半仿生提取法等。黄酮类化合物是一类重要活性物质,具有特殊的保健功能。本文旨在为黄酮类化合物的提取研究、开发、应用提供一定的参考。%ABSTRACT:This paper reviews the semi-bionic extraction of flavonoids.The semi-bionic extrac-tion methods related to traditional Chinese medicinal plants include semi-bionic extraction,semi-bionic alcohol extraction,microwave-assisted semi-bionic extraction,ultrasonic-assisted semi-bion-ic extraction,enzyme-assisted semi-bionic extraction,etc.Flavonoids are a class of important ac-tive substances with special health functions.This paper aims to provide a reference for the ex-traction,development and application of flavonoids.

  15. Bionic crab walking mechanism and its kinematic characteristics analysis%仿螃蟹步行机构及其通过性试验

    Institute of Scientific and Technical Information of China (English)

    李建桥; 张广权; 王颖; 吴宝广; 黄晗; 薛龙

    2016-01-01

    仿生步行机构的研究对于复杂地形的行走机构开发具有十分重要的意义。为了设计出性能优越、结构简单的仿生步行机构,通过分析中华绒螯蟹的行走步态,提出了仿螃蟹步行机构的设计方案。由于螃蟹尾端的两只步足较少参与行走,为简化设计,将步行机构设计成6足式,腿部运动由六连杆机构实现。利用三维建模软件 CATIA 建立了步行机构整体模型,并在 ADAMS 中完成了运动学分析,得到步行机构足端运动轨迹,结果表明该步行机构能够完成预期的动作。根据设计加工出样机,在非常规地面上与轮式模型车进行通过性对比试验,结果表明仿螃蟹步行机构在农业生产所涉及的松软地面上具有较高的通过性能,在崎岖硬地面上波动比轮式模型车降低5%~75%。该步行机构还可作为试验平台,通过对其腿部杆件尺寸和足端触地方式的优化,为开展提高步行机构在不同地面通过性提供基础研究设备条件。%The research of bionic walking mechanism is of great significance for the development of walking mechanism on complex terrain. In order to design a bionic walking mechanism with superior performance and simple structure, by analyzing the walking gait of Eriocheir sinensis Milne-Edwards, the design scheme of the crab walking mechanism was proposed. Due to 2 feet at the end of the crab less involved in walking, in order to simplify the structure, the walking mechanism was designed to have 6 feet, and leg movement was achieved by the six-link mechanism. The whole model of the walking mechanism was established by the three-dimensional (3D) modeling software CATIA, and the kinematics analysis was finished in ADAMS. The results showed that the walking mechanism could complete the expected action. Based on the design, bionic walking mechanism prototype was produced, and walking test of bionic walking mechanism on the smooth hard

  16. 仿生纳米测控技术%Bionics of Nanotechnology for Measurement and Control

    Institute of Scientific and Technical Information of China (English)

    任恕; 周宜开; 吴蒙

    2001-01-01

    讨论了纳米技术、纳米测控技术与仿生纳米测控技术,论述了这一课题的重要意义,包括它对生物医学与工程技术的贡献。提出细胞是研究仿生纳米测控技术的优选对象,细胞膜是其最佳切入点。建立了仿生纳米测控技术的分子系统与分子网络模型。讨论了实现这些模型的纳米制造、生物技术、化学制造与混合制造等方法。强调了广义纳米制造方法的优越性。集成于细胞膜上的分子系统与分子网络是仿生纳米测控技术的典型,前者还可据此构建纳米机器人,后者还可据此组建纳米工厂。对纳米测控技术的应用前景作了展望:指出了它将在测控心理活动;基因的诊断、治疗,组建单细胞纳米测控平台;研制纳米机器与组装纳米工厂等领域所发挥的关键作用。%Nanotechnology,nanotechnology for measurement and control,bionics of nanotechnology are discussed.The significance of the topic including its contribution to biology and medicine as well as to engineering and technology is emphasized.Cell may be the best object to be researched.Cell membrane,may be the key of such a study.By means of simulating the structure and function of a cell's membrane,a molecular systematic model of nanorobot and a molecular network model of nanofactory are suggested.Methodologies for realizing such models are presented.Among them,nanofabrication biotechnology,chemical method and hybrid integration are illustrated.Nanofabrication in a broad sense will be preferable to others.At last,a diagram showing the perspectives of the new technologies including measuring and control of psychological state,establishing platform for monitoring a single cell,constructing nanorobot and nanofactory etc was depicted.

  17. Wear properties of H13 with micron scale and nano scale grains bionic units processed by laser remelting

    Science.gov (United States)

    Zhang, Peng; Zhou, Hong; Wang, Cheng-tao; Liu, Yan; Ren, Lu-quan

    2013-12-01

    By simulating the cuticles of some soil animals, a combination of soft part (untreated substrate) and hard part (laser remelting area) structure was designed on metal surface to get an improved performance. Different specimens were prepared which contained units with micro and nano scale grains. The microstructures were observed by environmental field emission scanning electron microscopy. X-ray diffraction was used to identify the phases. The results of these tests indicate that due to the rapid solidification condition in the water, nano scale grains have a high microhardness between 1300 and 1000 HV. Retained austenite was found in it. Some of them transform to martensite in block on ring wear test. Specimens with bionic unit have a better wear resistance. Especially, the units with nano grains bring a further enhancement. The alternate soft and hard in macroscopic (substrate and laser remelting area) and microscopic (austenite and martensite) structure played a key role in improving the H13 wear resistance.

  18. A novel nano-sized bionic function interface for enhancing the ability of red blood cells to carry oxygen

    International Nuclear Information System (INIS)

    A nano-sized bionic function interface was prepared by immobilizing red blood cells onto a silver electrode, which was modified with cysteamine and colloidal gold. Scanning electron microscopy and electrochemical impedance spectroscopy were used to characterize its surface. Cyclic voltammograms in phosphate buffer solution of pH 7.0 exhibited a pair of redox peaks for oxygen at -378 and -207 mV, respectively. The reduction peak currents at -378 mV were linearly proportional to the oxygen concentration in the range from 12.6 μM to 1.39 mM. Cyclic voltammetry also indicated that the functional surface enhanced the ability of red blood cells to transport oxygen. (author)

  19. [Bionic surface design in metal on metal bearings for total hip arthroplasty--optimization of tribological characteristics].

    Science.gov (United States)

    Böhling, U; Scholz, J; Thomas, W; Grundei, H

    2005-04-01

    Bionic systems are aiming to integrate natural observing into mechanical solutions. This has been realized in the design of metal on metal bearing in total hip resurface arthroplasty. The articular side of the femoral cup is covered with a dimple like surface. Under laboratory condition this so called "surf-metal-cup" achieved a reduction of the mechanical wear to almost a third part in comparison to a metal-cup with plane surface. This advantage, caused by the reduced friction-coefficient due to improved hydrodynamic lubrication could also be proved under laboratory conditions. The clinical introduction is expected to offer a significant extension of durability in this prosthetic system and needs to be proved in a long-term study.

  20. Synthesis of Bioactive Three-dimensional Silicon-oxide Nanofibrous Structures on the Silicon Substrate for Bionic Devices’ Fabrication

    Directory of Open Access Journals (Sweden)

    Candace Colpitts

    2016-02-01

    Full Text Available Bionic devices are implants that replace biological functions that have been lost due to damaged or lost tissue. The challenge of this area is to find the appropriate materials to match the biocompatible criteria with the same mechanical and electrical performance. In this research, a new method is introduced for the enhance‐ ment of silicon biocompatibility by fabrication of a 3D nanofibrous layer on the silicon surface, induced by nanosecond laser pulses at a high repetition rate and power. It was found that the laser treatment with small‐ er line spacing and a higher overlap number enhanced the biocompatibility of silicon. The results display a promis‐ ing improvement in the biocompatibility of silicon for the production of biomedical devices such as sensors, bio- MEMS and nano-biomaterial fabrications.

  1. Bionic Design of Fertilizer Sampling Robot%复合肥取样机器人仿生设计

    Institute of Scientific and Technical Information of China (English)

    唐启敬; 赵铁石; 边辉; 耿明超

    2011-01-01

    针对复合肥生产的高粉尘强腐蚀环境,设计了一种能够替代人工作业的取样机器人.分析使用需求,提出具有抗冲击、耐腐蚀、自清洁、传动机构内置、驱动远离末端执行件安装等特征的取样机器人设计原则.从仿生学角度出发,通过对螃蟹运动关节结构特征研究,提出取样机器人构型,进行了功能仿生和结构仿生设计.根据其使用工况,设计了取样机器人运动过程和控制方案.通过机构参数优化、仿真和冲击试验,验证了其可行性.%In order to release the fertilizer production workers working in high dust and strong corrosive environment for a long time, a sampling robot was designed. By analyzing the using demand, robot' s designing principles including characteristics of impact resistance, corrosion resistance, cleaning by itself, transmission mechanism built-in and drive away from the end piece installed was proposed. From the angle of bionics, the crab joints' structure characteristic was researched. Then sampling robot configuration was proposed. Bionics function and structure was designed. According to its operation condition, motion process and control plan was designed. After the parametric optimization, its feasibility was validated by simulation and impact test.

  2. Butterfly bionic antenna with ultra-wideband property%蝴蝶仿生超宽带天线

    Institute of Scientific and Technical Information of China (English)

    孙俊枝; 陈星

    2013-01-01

    Bionic antennas based on bionics principle not only are able to achieve good antenna performances,but also pos⁃sess beautiful shapes or concealed property. In this paper,a printed microstrip monopole antenna with ultra⁃wideband(UWB) property was designed by mimicking the shape of a butterfly. This antenna was fabricated and measured. It has a butterfly⁃like appearance. The measurement results that its ||S11 <-10 dB impedance bandwidth reaches 107%(3.2~10.6 GHz),and the anten⁃na has the omnidirectional radiation characteristics. The size of the antenna is only 26 mm×27.8 mm×1 mm.%  基于仿生学原理,仿生天线能够在获得良好天线性能的同时,兼顾天线外形美观或隐蔽性.模仿蝴蝶外形,设计了一款具有超宽带特性的印刷微带单极子天线,并加工制作.该天线外观酷似蝴蝶,测试表明该天线的||S11<-10 dB的阻抗带宽达到了107%(3.2~10.6 GHz),天线具有全向辐射特性,天线尺寸仅为26 mm×27.8 mm×1 mm.

  3. 截肢者日常生活用假手的仿生设计方法%Bionics Design of Artificial Hands for Amputees

    Institute of Scientific and Technical Information of China (English)

    王人成; 王爱明; 刘启栋

    2011-01-01

    This paper discusses the bionics design methods of artificial hands for amputees from aspects of appearance and material, function and structure, control and operation methods. Putting forward some cases of artificial hand with unidirection and multi-degree of freedom, the factors of artificial hands bionics design are analyzed.%本文从外观式样与材料、功能与结构,以及控制与操纵方式三个角度讨论了截肢者日常生活用假手的仿生设计方法.通过对单自由度和多指多自由度典型假手实例进行分析,分析了假手仿生设计需要重点考虑的几个因素.

  4. Structure Design of Bionic Gecko's toe and the Adhesive Locomotion Performance Test%仿壁虎脚趾结构设计及粘附运动性能测试

    Institute of Scientific and Technical Information of China (English)

    俞志伟; 李宏凯; 张晓峰; 张昊; 戴振东

    2011-01-01

    壁虎具有在各种表面(如地面、墙面、天花板)上运动的超凡能力.根据大壁虎的脚趾结构及其粘附方式,模拟大壁虎脚趾,设计具有微小粘性褶皱和柔性悬臂结构的仿壁虎脚趾.用多用途摩擦粘附性能试验台,测定仿壁虎脚趾的粘附性能,即仿壁虎脚趾最大拉伸粘附力大小与粘附次数、拉伸角度、粘附轨迹等参数的关系.试验表明模拟壁虎脚趾研制的新型粘附脚趾具有和生物壁虎脚趾相近的粘附力学特性.将此脚趾用于仿壁虎机器人,成功地实现了仿壁虎机器人的90°爬壁.%Gecko has a superb locomotive capacity on variety surface, such as the ground, walls, ceilings and other complex environment in space. By analyzing the locomotion of gecko's toe adhesion structure and adhesion methods, bionic gecko's toe is designed which has several minimal adhering folds with flexible cantilever structure. By using multipurpose friction force experimental platform, the adhesion performance of bionic gecko's toe is analyzed, including the changing of the maximum tensile adhesion force of bionic gecko's toe with the adhesion numbers, the different stretching angles, different adhesion trajectories, and so on. The experiment shows that bionic gecko'toe has similar adhesion force performance with gecko's toe. When the bionic gecko's toe is designed for bionic gecko robot foot, the bionic gecko robot successfully achieves 90 degree wall-climbing movement.

  5. 仿生扑翼UUV流体动力数值计算%Numerical Calculation of Bionic Flapping Wing UUV's Hydrodynamics

    Institute of Scientific and Technical Information of China (English)

    张鹏; 宋保维; 杜晓旭

    2013-01-01

    仿生扑翼推进方式具有机动灵活、推进噪声低、稳定性好等特点,但由于外形的复杂性,仿生扑翼UUV的流体动力具有很强的非线性,给流体动力特性的研究带来难度.为了研究仿生扑翼的非线性流体动力特性,基于雷诺平均Navier-Stokes方程,采用RNG k-ε模型,建立了仿生扑翼UUV的流体动力计算数学模型,并利用ICEM CFD划分了网格,基于标准CFD软件Fluent对UUV的流体动力特性进行了仿真计算.结果表明,仿生扑翼UUV的流体动力在小攻角下呈线性变化,大攻角下出现非线性特征.%The bionic flapping wing has some advantages, such as agile maneuverability, low noise and high stability. But the hydrodynamics characteristic of the bionic flapping wing unmanned underwater vehicle (UUV) is nonlinear because of the complicated shape, so the research the hydrodynamics characteristic of the bionic flapping wing UUV is difficult. In this paper, to study the hydrodynamics characteristic of the bionic flapping wing UUV, the hydrodynamics calculation model was built based on the Reynolds average Navier-Stokes equation. And the meshes were divided by ICEM CFD. Than the hydrodynamics of the flapping wing UUV was simulated by Fluent. The results show that the hydrodynamics of the UUV shows linear characteristic when the angle of attack is small, but nonlinear characteristic when the angle of attack is big.

  6. Construction of a three-dimensional bionic nerve conduit containing two neurotrophic factors with separate delivery systems for the repair of sciatic nerve defects

    Institute of Scientific and Technical Information of China (English)

    Zhiyue Li; Qun Zhao; Ran Bi; Yong Zhuang; Siyin Feng

    2011-01-01

    Previous studies of nerve conduits have investigated numerous properties, such as conduit luminal structure and neurotrophic factor incorporation, for the regeneration of nerve defects. The present study used a poly(lactic-co-glycolic acid) (PLGA) copolymer to construct a three-dimensional (3D) bionic nerve conduit, with two channels and multiple microtubule lumens, and incorporating two neurotrophic factors, each with their own delivery system, as a novel environment for peripheral nerve regeneration. The efficacy of this conduit in repairing a 1.5 cm sciatic nerve defect was compared with PLGA-alone and PLGA-microfilament conduits, and autologous nerve transplantation. Results showed that compared with the other groups, the 3D bionic nerve conduit had the fastest nerve conduction velocity, largest electromyogram amplitude, and shortest electromyogram latency. In addition, the nerve fiber density, myelin sheath thickness and axon diameter were significantly increased, and the recovery rate of the triceps surae muscle wet weight was lowest. These findings suggest that 3D bionic nerve conduits can provide a suitable microenvironment for peripheral nerve regeneration to efficiently repair sciatic nerve defects.

  7. 仿生胶对枸杞害虫的防控技术研究%Control Technology of Bionic Glue against Insect Pests of Wolfberry

    Institute of Scientific and Technical Information of China (English)

    樊仲庆; 孙海霞; 王少东; 何嘉

    2013-01-01

    In the paper, we studied the effects of using bionic glue as fence around vegetable garden on the population dynamics of Chinese wolfberry. The results showed that, during spring and autumn, after using the bionic glue fence, the occurred periods of wolfberry aphids, psyllids and gall mites were significantly delayed, and the population densities were effectively reduced, therefore, pests damage on wolfberry were obviously alleviated. In addition, using bionic glue had no effect on bud emergence, leaf unfolding and fruit quality of wolfberry.%研究了仿生胶封园对枸杞害虫种群动态的影响,结果表明,初春和秋季采用仿生胶封园,明显推迟了枸杞蚜虫、木虱和瘿螨的发生期,可有效压低枸杞蚜虫、枸杞木虱、枸杞瘿螨等害虫的虫口数,明显降低害虫对枸杞的为害水平,且仿生胶的使用不影响枸杞树萌芽、展叶和果实品质。

  8. Wastes disposal on board a ship. Apparatus to decompose and annihilate wet refuses bionically; Senjo no haikibutsu shori. Namagomi no bio bunkai shometsuki

    Energy Technology Data Exchange (ETDEWEB)

    Takenaka, S.

    1996-07-25

    A bionic refuse disposing and annihilating apparatus for wet refuses produced on board a ship was developed, and introduced in this paper. This apparatus uses a system that biomass as a decomposing medium is maintained dry in a disposal tank, and wet refuses are decomposed and annihilated by the biomass working only with water contained in the wet refuses themselves. The system uses a decomposing medium composed of a mixture of different kinds of organic matters mixed with various nutrients, and automatically controls absorption and exhalation of decomposing water without using a heater. Almost all of wet refuses decomposes and annihilates in twelve hours after having been charged in their original forms. The decomposing medium can be used continuously for six months to a year. Because of complete annihilation by the bionic effect, no residue is created. This system uses a normal-temperature decomposing and annihilating bionic technology, whose minimum temperature required for decomposition and annihilation is 10{degree}C or higher, and the highest permissible temperature is 75{degree}C. Dry and cool environment at about 20{degree}C is most suitable. Deodorizing function of the biomass itself as the decomposing medium suppresses odor generation. 3 figs.

  9. Research on the Feature Extraction of Bionic Color for Product-oriented Design%面向产品设计领域的色彩仿生特征提取探析

    Institute of Scientific and Technical Information of China (English)

    侯晓鹏; 杨保华

    2011-01-01

    According to the product design program and the color of natural biological characteristics,it summed up in two different forms for the process of bionic color design.For the feature extraction of biological prototype color,it summarized the four design principles,namely: main color optimization,the secondary colors appropriate to ignore: the color space configured bionic;the whole color bionics shared with the part color bionics;color feedback capabilities of bionic.Through the application of these design principles,it will provide a wider gamut color space for the product color design.%从产品设计程序出发,以自然生物色彩的特点为启示,总结出2种不同形式的仿生色彩设计流程。针对生物原型色彩特征的提取,归纳出4种设计原则,即:主体色优选,辅助色适当忽略:色彩面积配置仿生;整体色彩仿生与局部色彩仿生并用;色彩反馈功能仿生。通过这些设计原则的应用,将为产品色彩设计领域开拓更广阔的色域空间。

  10. Analysis and testing of mechanical properties for bionic skin materials%仿生皮肤材料的力学性能测试与分析

    Institute of Scientific and Technical Information of China (English)

    谢驰; 陈爽; 蔡鹏; 林大全; 王远苹

    2013-01-01

    仿生皮肤材料是一种由高分子材料复合而成的,作为汽车碰撞安全性能实验假人皮肤肌肉的一种特殊功能材料.实验假人皮肤的反弹力和损伤因子影响汽车碰撞安全性能实验,影响汽车碰撞测试对人体的损伤程度判定的科学性和准确性.而仿生皮肤材料的力学性能主要受制备过程中混合基、填料的用量和硫化时间的不同等因素影响.针对汽车碰撞实验假人仿生皮肤材料的特殊性,为了制备综合性能优越的仿生皮肤,对仿生皮肤材料的制备与力学性能进行研究,研究不同混合基胶、固化剂、填料剂和后硫化时间对仿生皮肤材料力学性能的影响,通过对3种制备不同的仿生皮肤材料进行超声波测试和冲击测试分析,探讨具有最优力学性能仿生皮肤材料的合成途径.%Bionic skin material is a special kind of functional materials made of a polymer composited materials, which can used in the automobile collision test for safety performance of dummy skin and muscle. The resilient and injury factor of dummy skin will have some affection to the automobile collision test for safety performance, and it has also the impact for the car crash test to determine the scientific and the accuracy of damaging on the human body. But the mechanical properties of bionic skin materials are mainly determined by the mixed base, the amount of filled material and the curing time in the preparation process. For the special performance of bionic skin materials used in automotive crash tes, the mechanical properties and the preparation of the bionic skin materials are studied, and the impact of the different mixed base rubber, curing agent, filler agents and post-curing time on the mechanical properties of bionic skin materials are also studied. Finally, the synthetic pathway of bionic skin materials with optimal mechanical properties is approched, with the help of ultrasonic testing and impact testing for three

  11. 结构仿生设计原理在展示设计中的应用%Application of Design Principle of Structural Bionics in the Design of Exhibition

    Institute of Scientific and Technical Information of China (English)

    张俊竹

    2016-01-01

    Natural regression and imitating nature is the human beings’ instinct. Bionics design displays the pursuit of human beings to the beauty of nature. The paper uses the bionics design concept for reference and applies the principle of structure bionics to the space design. Methods: This paper analyses the structural characteristics of creatures from the perspective of biological structure and explores the principle of structure bionics design. Conclusions: The paper summarizes the application types, application laws, application rules and the implied culture behind the bionics design and puts forward new understandings of the structure bionics design.%回归自然、模仿自然是人类的本性,仿生设计体现了人对美好自然的追求。文章借鉴仿生设计的理论,把结构仿生设计原理应用在展示空间设计中。从生物的结构入手,分析生物的结构特征,通过对优秀仿生设计案例剖析,探索结构仿生设计的原理。本文归纳总结了结构仿生设计原理在展示空间设计中的应用类型、应用规律、应用法则及应用仿生结构设计背后的文化内涵,并提出结构仿生设计的新见解。

  12. Intelligent PID controller based on ant system algorithm and fuzzy inference and its application to bionic artificial leg

    Institute of Scientific and Technical Information of China (English)

    谭冠政; 曾庆冬; 李文斌

    2004-01-01

    A designing method of intelligent proportional-integral-derivative(PID) controllers was proposed based on the ant system algorithm and fuzzy inference. This kind of controller is called Fuzzy-ant system PID controller. It consists of an off-line part and an on-line part. In the off-line part, for a given control system with a PID controller,by taking the overshoot, setting time and steady-state error of the system unit step response as the performance indexes and by using the ant system algorithm, a group of optimal PID parameters K*p , Ti* and T*d can be obtained, which are used as the initial values for the on-line tuning of PID parameters. In the on-line part, based on Kp* , Ti*and Td* and according to the current system error e and its time derivative, a specific program is written, which is used to optimize and adjust the PID parameters on-line through a fuzzy inference mechanism to ensure that the system response has optimal transient and steady-state performance. This kind of intelligent PID controller can be used to control the motor of the intelligent bionic artificial leg designed by the authors. The result of computer simulation experiment shows that the controller has less overshoot and shorter setting time.

  13. 气动类人仿生机械手设计%Design of Pneumatic Robot Multi-Fingered Bionic Hand

    Institute of Scientific and Technical Information of China (English)

    王利波; 张志军; 王领

    2013-01-01

    On the basis of the manipulator, a new kind of pneumatic bionic manipulator is designed and produced according to 1. 5 times of adult palm. The mechanical structure, working principle, pneumatic drive system and computer control system are introduced. According to the size of ball diameter, the angles to the knuckles is optimized, and five finger interaction can grab a certain range of diameter balls.%在了解现有的类人机械手的基础之上,按照人手的1.5倍设计并制作了一款新型气动类人仿生机械手.阐述了它的机械结构、工作原理、气动控制系统和计算机控制系统.根据抓取球体直径的大小优化了指关节弯曲的角度.通过五个手指的联动可以实现一定范围直径的球体抓取.

  14. Influence of Orientations of Bionic Unit Fabricated by Laser Remelting on Fatigue Wear Resistance of Gray Cast Iron

    Science.gov (United States)

    Chen, Zhi-Kai; Zhou, Ti; Zhang, Hai-feng; Yang, Wan-shi; Zhou, Hong

    2015-06-01

    Fatigue wear resistance improvements were researched by studying experimental samples with gray cast iron fabricated with bionic units in different orientations. Experimental samples were modified by laser surface remelting, including parallel, vertical, and gradient units to the wear direction. The remelting pool was then studied to determine the micro-hardness, microstructure, alteration of phase, and etc. Lab-control fatigue wear test method was applied with the treated and untreated samples tested under the laboratorial conditions. Wear resistance result was considered as the rolling contact fatigue (RCF) resistance and mechanisms of the modified samples were experimentally investigated and discussed. Results suggested that all treated samples demonstrated the beneficial effect on the RCF improvement due to lack of graphite and reinforcement of treated region. Results also indicated the sample with fastigiated units was more effective than that with vertical units or parallel units to the wear direction. Influence of the sample unit's angle which intensely depended on the conditions of actual application, however, was not identified.

  15. Glucose as fuel for chemo-electric drives - bionic aspects; Glucose als Treibstoff fuer chemoelektrische Antriebe - bionische Aspekte

    Energy Technology Data Exchange (ETDEWEB)

    Radebold, R. [RADEBOLD Ingenieurbuero, Berlin (Germany)

    2003-07-01

    Installation of a bionic energy system requires three aspects: 1. Technical implementation of the principles of air-breathing, glucose-uptaking chemoelectric converters of the biological energy system; 2. step-by-step replacement of today's technical energy system by chemoelectric converters for similar energy services; 3. Production of glucose from biomass, distribution and use as renewable hydrogen transmitter in aqueous solution. The author's company works on these tasks. Priority is given to the first-mentioned task but the others are considered as well. Results and the state of the art are reported. (orig.) [German] Fuer die Installation eines bionischen Energiesystems sind drei Aufgaben zu erfuellen: 1. Uebertragung der Prinzipien von Bau und Betrieb der luftatmenden, glucose-tankenden chemoelektrischen Wandler des biologischen Energiesystems in die Technik, 2. schrittweiser Ersatz des heutigen technischen Energiesystems durch chemoelektrische Wandler bei gleichen Energiedienstleistungen. 3. Gewinnung von Glucose aus Biomasse, Verteilung und Einsatz als nachwachsendem Wasserstoffuebertraeger in waessriger Loesung als Treibstoff der Wandler. Wir haben uns dieser Herausforderung gestellt und arbeiten seit einigen Jahren an den obigen Aufgaben. Oberste Prioritaet hat die erste Aufgabe, aber auch die beiden anderen Aufgaben finden die notwendige Aufmerk-samkeit. Wir berichten im Folgenden ueber unsere Ergebnisse sowie ueber den Stand der Technik. (orig.)

  16. 提升轮胎抗滑水性能的仿生方法%Bionic Method for Improving Tire Anti-hydroplaning Performance

    Institute of Scientific and Technical Information of China (English)

    周海超; 梁晨; 杨建; 王国林; 薛开鑫

    2015-01-01

    提高花纹沟排水能力是提升轮胎抗滑水性能的主要途径之一,借鉴仿生学理念,将凹坑形仿生非光滑结构引入花纹沟,探索研究通过降低花纹沟流体阻力提高花纹沟排水能力的仿生方法。以轮胎接地区单个花纹沟作为研究对象,在沟底布置凹坑形仿生非光滑结构,运用计算流体动力学(Computational fluid dynamics,CFD)和正交试验设计相结合的方法,研究凹坑形仿生非光滑结构对壁面减阻率的影响规律,确定最优参数组合;为进一步提升凹坑形仿生非光滑结构的减阻率,提出一种水滴形凹坑仿生结构,并对其减阻特性进行分析,得出其减阻效果优于圆形凹坑结构;将最优的水滴形凹坑仿生结构布置于花纹沟底部,分析其抗滑水性能。结果表明,水滴形凹坑仿生结构能够减小水流阻力,提高轮胎花纹沟排水量,降低轮胎在水膜上行驶时所受到的胎面动水压力,提升轮胎的抗滑水性能。%Enhancing the groove dralnage ability is one of the maln ways to improve the tire anti-hydroplaning performance. Inspired by the bionic theory, the pit bionic non-smooth structure is introduced into tire groove and bionic method for enhance groove dralnage ability by reducing fluid resistance is explored. The single tire groove of contact area is extracted for analysis and the pit bionic non-smooth structure is arranged on the bottom of tire groove. The computational fluid dynamics(CFD) and orthogonal experimental design are used to study the influence of pit bionic non-smooth structure on wall drag reduction, and the optimal parameters combination is determined. To further enhance the drag reduction rate of pit bionic non-smooth structure, a water drop shaped pit boinic structure is proposed and its drag reduction characteristic is analyzed. The results show the drag reduction effect of the water drop shaped pit boinic structure is better than

  17. 仿生机器鱼胸鳍驱动机构设计%Design of Driving Mechanism of Bionic Robotic Fish Pectoral

    Institute of Scientific and Technical Information of China (English)

    傅继军; 洪梓榕; 殷培峰

    2015-01-01

    设计了一种二自由度的胸鳍驱动机构。该机构采用连杆机构和齿轮机构分别实现仿生机器鱼的前后拍翼运动和摇翼运动,具有运动形式简单、效率高、可靠性好的特点。对驱动机构进行了运动学分析,建立了驱动机构的数学模型。仿生机器鱼通过两侧胸鳍配合,可以实现仿生机器鱼前进、后退、转弯等基本运动,为仿生机器鱼的设计提供了一套切实可行的方案。%This paper proposes a propulsion mechanism for bionic robotic fish with two degrees of freedom pectoral fin.In this design,the lead -lag motion and feathering motion are respectively achieved by linkage mechanism and gear mechanism.The movement characteristics of this mechanism are simple and efficient with good reliability.Its mathematical model is obtained through the analysis of the propulsion mechanism of kinematics.Bionic robotic fish can achieve basic movement such as forward,backward and turn by both sides of the pectoral fins.A feasible solu-tion is provides for the design of a bionic robotic fish.

  18. Design and preparation of polyurethane-collagen/ heparin-conjugated polycaprolactone double-layer bionic small-diameter vascular graft and its preliminary animal tests

    Institute of Scientific and Technical Information of China (English)

    LU Guang; CUI Shi-jun; GENG Xue; YE Lin; CHEN Bing; FENG Zeng-guo; ZHANG Jian

    2013-01-01

    Background People recently realized that it is important for artificial vascular biodegradable graft to bionically mimic the functions of the native vessel.In order to overcome the high risk of thrombosis and keep the patency in the clinical small-diameter vascular graft (SDVG) transplantation,a double-layer bionic scaffold,which can offer anticoagulation and mechanical strength simultaneously,was designed and fabricated via electrospinning technique.Methods Heparin-conjugated polycaprolactone (hPCL) and polyurethane (PU)-collagen type Ⅰ composite was used as the inner and outer layers,respectively.The porosity and the burst pressure of SDVG were evaluated.Its biocompatibility was demonstrated by the 3-(4,5-dimethyl-2-thiazol)-2,5-diphenyl-2H tetrazolium bromide (MTT) test in vitro and subcutaneous implants in vivo respectively.The grafts of diameter 2.5 mm and length 4.0 cm were implanted to replace the femoral artery in Beagle dog model.Then,angiography was performed in the Beagle dogs to investigate the patency and aneurysm of grafts at 2,4,and 8 weeks post-transplantation.After angiography,the patent grafts were explanted for histological analysis.Results The double-layer bionic SDVG meet the clinical mechanical demand.Its good biocompatibility was proven by cytotoxicity experiment (the cell's relative growth rates (RGR) of PU-collagen outer layer were 102.8%,109.2% and 103.5%,while the RGR of hPCL inner layer were 99.0%,100.0% and 98.0%,on days 1,3,and 5,respectively) and the subdermal implants experiment in the Beagle dog.Arteriography showed that all the implanted SDVGs were patent without any aneurismal dilatation or obvious anastomotic stenosis at the 2nd,4th,and 8th week after the operation,except one SDVG that failed at the 2nd week.Histological analysis and SEM showed that the inner layer was covered by new endothelial-like cells.Conclusion The double-layer bionic SDVG is a promising candidate as a replacement of native small

  19. SMA丝驱动的仿生尾鳍推进器的实验研究%Experimental Research on Bionic Caudal Fin Actuated by SMA Wires

    Institute of Scientific and Technical Information of China (English)

    李健; 郭艳玲; 王振龙; 袁斯洋

    2013-01-01

    To study the movement mechanism of fish caudal fin,a bionic caudal fin propulsor actuated by SMA wires imitating the real fin well was developed based on studying its structure.The propulsive performance experimental results revealed the relation between thrust with action parameters,configuration and dimension of caudal fin.For further research on the hydromechanical mechanism,a surface flow display system was developed based on poly tetra fluoro ethylene (PTFE)micro powder.Visualization research of the formation process of vortex ring produced by the bionic propulsor was successfully done on the forementioned system.The experimental results approve of the swimming characters and mechanism of caudal fin.The bionic caudal fin is suited to research fish swimming mechanism and as a groundwork for further research on bionic robot fish.%为了研究鱼类尾鳍的推进机理,在研究鱼类尾鳍结构的基础上,研制了形状记忆合金(SMA)丝驱动的仿生尾鳍推进器,并完成了其推进性能试验,得到了动作参数、被动尾鳍形态、尺寸对推进力的影响.为进一步研究其流场机制,研制了基于改性聚四氟乙烯微粉(PTFE)的液面流场显示系统,并在该系统上对尾鳍推进器摆动后的涡环形成过程进行了可视化研究,实验结果验证了文献中鱼类真实尾鳍的游动特点和游动机制,可见所研制的仿生尾鳍推进器仿生性能好,适用于鱼类游动机理研究,并为仿生鱼的研制奠定了基础.

  20. Study on Cyberdomain Robustness Based on Concept of Bionics%基于仿生概念的网电空域鲁棒性研究

    Institute of Scientific and Technical Information of China (English)

    周永学; 丁国良; 原亮

    2014-01-01

    阐述了网电空域研究工作中以仿生方式进行电磁防护研究的基本内容,对研究内容在整个仿生领域中予以定位。定义了网电空域的基本概念,分析了空间电磁环境的安全问题,建立了电磁防护仿生研究的表象级对等模型,提出并归纳了研究策略和实现基础。根据结构和功能的关系进行相应方案的规划,并结合生物鲁棒性的研究成果,在分级冗余基础上考虑鲁棒裕度设计,描述网络简并、功能梯度和旁路易化的特征。因此,使得网电环境下电磁防护的仿生构想在技术上成为可能。%Discuss the basic content of studying the electromagnetic protection with bionics in cyberdomain,and locate them in the section of bionic axis. Define “cyberdomain” and analyze the security problem of spatial electromagnetic environment,establish the representa-tion equivalent model of electromagnetic protection bionic research,and summarize the research strategy and implementation basis. Ac-cording to the relationship between the structure and function,the corresponding scheme is planning,and combined with the research re-sults of biological robustness,based on hierarchical redundancy,considering the robust tolerance design,describe the characteristics of net-work degeneracy,functional gradient. Thus,in cyber field,the hypothesis of electromagnetic protection by means of applying bionic tech-nology has become a reality.

  1. Design of Bionic Knee Joint Mechanism Based on Hybrid Actuation%基于混合驱动仿生膝关节机构设计

    Institute of Scientific and Technical Information of China (English)

    吴成东; 金基准; 闻时光; 王斐; 齐亚鲁

    2012-01-01

    目的 针对传统假肢关节机构与驱动系统的不足,设计并实现由磁流变阻尼器结合直流电机混合驱动,滚珠丝杠传动的多轴闭链仿生膝关节.方法 通过多变量优化设计方法求解出膝关节机构参数、滚珠丝杠安装位置参数和电机的角速度及扭矩.基于虚拟样机技术构建了智能仿生腿的仿真平台并在其上进行了运动学仿真.结果 仿生膝关节与人腿膝关节运动曲线接近,结合电机驱动可实现更大范围的步速调整.结论 该优化方法得到的系统参数可使膝关节机构具有很高的仿生特性及良好的运动特性.%Corresponding to the deficiency of joint structure and actuation system for traditional prosthesis, multi-axis closed-chain bionic knee joint that is actuated by MR damper augmenting with DC motor and transmitted by ball screw is designed and implemented. By employing multi-variables optimization method, mechanism parameters of knee joint,installation position parameters of ball screw and angular velocity and torque of DC motor can be obtained. The simulation platform of intelligent bionic leg is then constructed by using virtual prototype technology and kinematics simulation is conducted. The movement curves of bionic knee joint are similar with that of human subjects. The mechanism can realize wider adjustment range of gait velocity by combining with DC motor actuation. Experimental results indicate that it can achieve high bionic characters and good motion performance for knee joint mechanism with the optimal parameters calculated by the proposed scheme.

  2. 海洋仿生食品的综合生产加工%The comprehensive production and processing of marine bionic food

    Institute of Scientific and Technical Information of China (English)

    孙晓莲

    2013-01-01

      对国内外海洋仿生食品的生产加工及消费进行了论述,主要对模拟蟹肉、鱼丸、鱼豆腐、腰花肠、包心鱼丸等海洋仿生食品的生产加工进行了详细介绍。%The comprehensive production, processing and consume of marine bionic food at home and abroad were re-viewed in this paper. The imitation crab meat, fish balls, fish tofu, fish sausages, and stuffed fish balls were introduced in detail.

  3. Technologies for Bionic Simulation of Osteocyte Microenvironment%骨细胞微环境仿生模拟技术

    Institute of Scientific and Technical Information of China (English)

    任丽; 续惠云; 骞爱荣; 商澎

    2014-01-01

    mechanical stimulations.The microenvironment surrounding osteocyte is therefore of crucial importance to both elucidating the mechanism of mechanical perception and discovery of new biological functions.However,the complicated lacuna-canalicular network surrounded by rigid bone matrix makes the study of osteocyte in vivo technically difficult.It can be of great significance to reconstruct bionic microenvironment in vitro for further revealing the functions of osteocyte.The systematic introduction of structural,biochemical and mechanical microenvironment surrounding osteocyte was presented here,and the recent technologies for simulation of bionic microenvironment in vitro were also reviewed.This review will provide a useful reference for researchers who are interested in osteology,tissue engineering and regenerative medicine.

  4. 同步仿生机械臂设计%The Design of Synchronization Bionic Robot Arm

    Institute of Scientific and Technical Information of China (English)

    云彩霞; 李珊; 宋晓华; 李昆

    2014-01-01

    本设计利用安装在人手臂部的加速度传感器采集运动信号,单片机智能运算后发出控制指令,实现机械臂与人臂的同步运动。系统将在采集传感器的输出模拟量经过单片机的处理产生PWM波,使用PWM波驱动舵机实现准确定位,使机械臂实现三自由度的运动。而且还可通过编程和仿生来完成各种预期的作业任务,在构造和性能上兼有人和机器各自的优点,体现了人的智能和适应性。%This design uses the collected motion signal of the acceleration sensor installed in the arm department,issued in the single-chip smart computing control commands,synchronous movement of the manipulator arm.Acquisition sensor output analog processing After the microcontroller PWM wave using PWM wave-driven steering gear to achieve accurate positioning,so that the robotic arm to achieve three degrees of freedom of movement.But also through programming and bionic complete a variety of expected operating tasks,both in structure and performance of the respective advantages of both humans and machines,human intelligence and adaptability.

  5. Verifying with tests the improved dynamic and passive damping behavior of components: structural optimization based on bionic principles

    Science.gov (United States)

    Weiss, Johannes; Maier, Martin; Herrmann, Hans-Georg; Steibler, Philipp

    2004-07-01

    In the automotive industry, the need for affordable lightweight structures rises as new fuel consumption regulations tighten and customers demand for performance increases. One way of achieving a cost-effective and weight-optimal design is by means of structural optimization. In 1991, A. Baumgartner, S. Burkhardt and C. Mattheck published their first paper on topology optimization based on bionic principles. Nature is inevitably dependent on the most efficient use of the body's mass. Using a fully-stressed-method, the original SKO-method is able to optimize engineering components with regard to maximum strength and stiffness. For several years now, the SKO-method has been successfully applied and enhanced for complex structural optimization at the Research & Technology Division of DaimlerChrysler AG. The subject presented in this paper was investigated in cooperation with the Institut fur Verbundwerkstoffe GmbH at the Technical University of Kaiserslautern. The aim is to present the new developments concerning the SKO-method. Starting with a short introduction to the original SKO-method, the newly implemented FreedOpt (Frequency and Damping Optimization) module is explained afterwards. FreedOpt can tune natural frequencies to a desired level. In cases were the tuning of frequencies is not sufficient, damping is needed. The new module is able to optimize the utilization of damping material with a new approach based on maximizing the dissipated vibration energy. The main focus of the paper is on the verification of the simulation results with physical tests. Finally, the new tool is applied to automotive parts. Concluding, the authors give an outlook for future work.

  6. Restoration of vision in blind individuals using bionic devices: a review with a focus on cortical visual prostheses.

    Science.gov (United States)

    Lewis, Philip M; Ackland, Helen M; Lowery, Arthur J; Rosenfeld, Jeffrey V

    2015-01-21

    The field of neurobionics offers hope to patients with sensory and motor impairment. Blindness is a common cause of major sensory loss, with an estimated 39 million people worldwide suffering from total blindness in 2010. Potential treatment options include bionic devices employing electrical stimulation of the visual pathways. Retinal stimulation can restore limited visual perception to patients with retinitis pigmentosa, however loss of retinal ganglion cells precludes this approach. The optic nerve, lateral geniculate nucleus and visual cortex provide alternative stimulation targets, with several research groups actively pursuing a cortically-based device capable of driving several hundred stimulating electrodes. While great progress has been made since the earliest works of Brindley and Dobelle in the 1960s and 1970s, significant clinical, surgical, psychophysical, neurophysiological, and engineering challenges remain to be overcome before a commercially-available cortical implant will be realized. Selection of candidate implant recipients will require assessment of their general, psychological and mental health, and likely responses to visual cortex stimulation. Implant functionality, longevity and safety may be enhanced by careful electrode insertion, optimization of electrical stimulation parameters and modification of immune responses to minimize or prevent the host response to the implanted electrodes. Psychophysical assessment will include mapping the positions of potentially several hundred phosphenes, which may require repetition if electrode performance deteriorates over time. Therefore, techniques for rapid psychophysical assessment are required, as are methods for objectively assessing the quality of life improvements obtained from the implant. These measures must take into account individual differences in image processing, phosphene distribution and rehabilitation programs that may be required to optimize implant functionality. In this review, we

  7. An insect-inspired bionic sensor for tactile localisation and material classification with state-dependent modulation

    Directory of Open Access Journals (Sweden)

    Luca ePatanè

    2012-08-01

    Full Text Available Insects carry a pair of antennae on their head: multimodal sensory organs that serve a wide range of sensory-guided behaviours. During locomotion, antennae are involved in near-range orientation, for example in detecting, localising, probing and negotiating obstacles.Here we present a bionic, active tactile sensing system inspired by insect antennae. It comprises an actuated elastic rod equipped with a terminal acceleration sensor. The measurement principle is based on the analysis of damped harmonic oscillations registered upon contact with an object. The dominant frequency of the oscillation is extracted to determine the distance of the contact point along the probe, and basal angular encoders allow tactile localisation in a polar coordinate system. Finally, the damping behaviour of the registered signal is exploited to determine the most likely material.The tactile sensor is tested in four approaches with increasing neural plausibility: First, we show that peak extraction from the Fourier spectrum is sufficient for tactile localisation with position errors below 1%. Also, the damping property of the extracted frequency is used for material classification. Second, we show that the Fourier spectrum can be analysed by an Artificial Neural Network which can be trained to decode contact distance and to classify contact materials. Thirdly, we show how efficiency can be improved by band-pass filtering the Fourier spectrum by application of non-negative matrix factorisation. This reduces the input dimension by 95% while reducing classification performance by 8% only. Finally, we replace the FFT by an array of spiking neurons with gradually differing resonance properties, such that their spike rate is a function of the input frequency. We show that this network can be applied to detect tactile contact events of a wheeled robot, and how detrimental effects of robot velocity on antennal dynamics can be suppressed by state-dependent modulation of the

  8. Restoration of vision in blind individuals using bionic devices: a review with a focus on cortical visual prostheses.

    Science.gov (United States)

    Lewis, Philip M; Ackland, Helen M; Lowery, Arthur J; Rosenfeld, Jeffrey V

    2015-01-21

    The field of neurobionics offers hope to patients with sensory and motor impairment. Blindness is a common cause of major sensory loss, with an estimated 39 million people worldwide suffering from total blindness in 2010. Potential treatment options include bionic devices employing electrical stimulation of the visual pathways. Retinal stimulation can restore limited visual perception to patients with retinitis pigmentosa, however loss of retinal ganglion cells precludes this approach. The optic nerve, lateral geniculate nucleus and visual cortex provide alternative stimulation targets, with several research groups actively pursuing a cortically-based device capable of driving several hundred stimulating electrodes. While great progress has been made since the earliest works of Brindley and Dobelle in the 1960s and 1970s, significant clinical, surgical, psychophysical, neurophysiological, and engineering challenges remain to be overcome before a commercially-available cortical implant will be realized. Selection of candidate implant recipients will require assessment of their general, psychological and mental health, and likely responses to visual cortex stimulation. Implant functionality, longevity and safety may be enhanced by careful electrode insertion, optimization of electrical stimulation parameters and modification of immune responses to minimize or prevent the host response to the implanted electrodes. Psychophysical assessment will include mapping the positions of potentially several hundred phosphenes, which may require repetition if electrode performance deteriorates over time. Therefore, techniques for rapid psychophysical assessment are required, as are methods for objectively assessing the quality of life improvements obtained from the implant. These measures must take into account individual differences in image processing, phosphene distribution and rehabilitation programs that may be required to optimize implant functionality. In this review, we

  9. Study on the Piezoelectric Transformer in the Bionic Active Member%仿生主动构件压电变换器研究

    Institute of Scientific and Technical Information of China (English)

    杜设亮; 傅建中; 张云; 陈子辰

    2001-01-01

    Piezoelectric transformer is an important part in the bionic active member and it is an interactive electromechanical-coupled system. Piezoelectric intelligent structure models are presented from various angles and the effect of parameters of the piezoelectric coupled electromechanical system on the energy conversion efficiency of piezoelectric transformer is especially discussed in this paper. The establishment of the coupled model of the piezoelectric intelligent structure is helpful to interpret the physical essence of the bionic active member and to design the intelligent structure with better performance and higher efficiency.%压电变换器是仿生主动构件中的一个重要组成部分,是一个机电耦合的交互系统。提出了如何从多角度出发建立压电型智能结构的理论模型,并讨论了压电耦合机电系统各参数对压电变换器的能量转换效率的影响。压电型智能结构机电耦合模型的建立有助于解释仿生主动构件的物理实质,设计出性能更好、效率更高的智能结构。

  10. Underwater detection and obstacle avoidance of bionic machine fish%仿生机器鱼的水下探测和避障控制

    Institute of Scientific and Technical Information of China (English)

    王坤; 冯静安; 王卫兵

    2013-01-01

    文章提出了一种集成多红外测距传感器、GPS定位器、CMOS摄像头的仿生机器鱼,建立了仿生机器鱼传感器网络,设计了机器鱼的机构组成和技术参数,制定了一种仿生机器鱼游动规则库和控制方法,定义了10种机器鱼基本运动形式和几种转弯模式,使其在设定的游动规则中自主游动,主动避障,探测水下情况,实验验证了其有效性。%A bionic machine fish integrating infrared distance sensors ,GPS locator ,CMOS cameras is put forward .Robotic fish sensor network is established and the composition of the fish and the tech-nological parameters are set .A kind of swimming rule base and control method of the bionic machine fish is developed ,and ten kinds of basic movement forms and several turning modes of the fish are de-fined ,which makes the fish automatically swim ,actively avoid obstacle ,and detect underwater situa-tion by the defined swimming rules .The validity is verified by the experiments .

  11. Physiological and Ecological Theory and Technical Approach of Bionic Wild Production——A Case of Bionic Wild Production of Walnut in Tibetan Mountain%仿野生生产方式的生理生态学原理与技术途径——以西藏山地核桃仿野生栽培为例

    Institute of Scientific and Technical Information of China (English)

    关法春; 兰小中

    2012-01-01

    According to the practical demand of harmonious development between the ecological environment protection and genuine agricultural products, bionic wild production was propounded, including its conception, theoretical constitution and technical approach. Based on the organic combination between the inner constituents in system and environment, bionic wild production became a new advanced ecological agro-ecosystem, which is based upon the maintenance of the eco-system balance and biodiversity protection, and whose products accord with the needs of industrialization development in genuineness. Bionic wild production comprises the theory of physiology, ecology, compensation effect, agro-climatology, which its realistic technical approach was propounded, in order to promote the development of ecological agriculture.%针对生态环境保护和道地农产品生产协调发展的现实需求,提出仿野生生产方式的概念、理论构成和技术途径.仿野生生产方式强调系统内各组分与环境之间的有机组合,从而形成新的高级生态农业系统,其在维持生态系统平衡和生物多样性保护的基础上,生产出的产品在道地性上符合产业化发展的需要;仿野生生产方式从生理学理论、生态学理论、补偿效应原理、农业气候学理论等方面出发构建其理论基础,并基于理论形成具体的技术途径,以期推动生态农业理论的发展.

  12. Optimization Design of MEMS Bionic Vector Hydrophone%MEMS仿生矢量水听器优化设计

    Institute of Scientific and Technical Information of China (English)

    刘林仙; 张国军; 张文栋

    2013-01-01

    The MEMS bionic hair cell single vector hydrophone has the disadvantages of low sensitivity and obvious frequency response fluctuation. On the basis of theoretical analysis and simulation calculation, the hydrophone was optimized in this paper. The plastic cylinder was replaced by optical fiber as the material of cilia and a novel "half oil and half polyurethane" package structure was proposed. The hydrophone calibration was finished in National Defense Underwater Acoustics Calibration Laboratory of China. Results show that the performance of the hydrophone was greatly improved compared with that of the previous, with a sensitivity of -165 dB (including pre-amplification 26 dB), a frequency response range of 20 Hz-2 kHz(±4 dB) ,and a good directional pattern in the form of "8"-shape.%针对纤毛式MEMS仿生单矢量水听器灵敏度偏低、频响曲线起伏较大的缺陷,对该结构水听器进行了优化设计.通过理论分析和仿真计算,从两方面进行了优化,一是纤毛材料的选择,选用光纤替代塑料柱体;二是设计了一种“半油半酯”新型封装结构.最后在国防水声一级计量站对该封装水听器进行了相应的校准测试.测试结果表明,该水听器性能较之前有了明显提高,灵敏度达到-165 dB(包括前置放大26 dB),频响范围为20 Hz~2 kHz(±4 dB),具有良好的“8”字型指向性.

  13. Study on bionic flexible workflow modeling and adaptation algorithm%仿生柔性工作流建模与适应算法研究

    Institute of Scientific and Technical Information of China (English)

    王颖慧; 王东勃; 王增磊; 刘志忠

    2011-01-01

    为提高柔性工作流对外界动态变化的响应速度,将生物的反射机理引入柔性工作流,构建了柔性工作流神经网络系统.模仿生物响应外界刺激的反射机理,利用人工神经网络技术,在柔性工作流中建立了仿生柔性工作流模型,定义了该模型中的人工神经网络概念模型,并以该模型为基础,提出了柔性工作流适应算法框架.最后,以企业生产计划节点工时定额的制定为例,构建了处理元群为BP网络的仿生柔性工作流模型,对柔性工作流适应算法进行仿真.仿真结果显示,建立的模型能够根据参数的动态变化作出正确的响应,从而证明仿生柔性工作流适应算法能够智能响应外界动态变化.%To improve the responding speed of the flexible workflow to the external dynamic changes, introduced the biological mechanism of reflection into the flexible workflow, builded the neural network system in the flexible workflow. By using of the biological mechanism of reflection to the stimulus, created the bionic flexible workflow model and defined the concept model of artificial neural network in a flexible workflow with artificial neural network technology, then, proposed a framework of flexible workflow adaptation algorithm based on the above model. Finally, with an example of working hour quota set in the enterprise production planning node, simulated the flexible workflow adaptation algorithm based on the bionic flexible workflow model which the type of the processing neural group was BP model. Simulation results show that the established model can make correct response to the dynamic changes according to the parameters, thus proving the adaptation algorithm of bionic flexible workflow can respond to outside dynamic change intelligently.

  14. 一种仿生机械臂空间位置反馈方法的研究%Position Feedback of Bionic Manipulator Following Electrooculography Signals

    Institute of Scientific and Technical Information of China (English)

    贺巧玲; 张进华; 李婷; 洪军

    2012-01-01

    To solve bionic manipulator space position feedback, electrooculography (EOG) is used as the neurofeedback in the system. The mapping rules between the eye rotation angle and the corresponding EOG are analyzed by the experiment,in which the subjects repeatedly scan the multi-angle targets, and then the location model based on binocular vision of human eye is established; then the targets location information extracted from the parametric location model is converted to the manipulator coordinates via the quaternion coordinate transformation model between human eye and manipulator on the physics experiment platform to guide the positioning. The results show that the location model following binocular vision of human eye enables to effectively extract targets coordinates to provide space position feedback for bionic manipulator; simultaneously it provides a new idea for bionic manipulator space position feedback.%为了解决仿生机械臂空间位置反馈的问题,将眼电图作为神经反馈,应用于仿生机械臂空间位置反馈系统,通过多角度目标点重复扫视实验,分析眼球转动角度与对应眼电信号特征之间的映射规律,建立了人眼双目视觉定位模型.采用四元数法构建人眼、仿生机械臂坐标转换模型,并通过自行设计的物理实验平台进行坐标转换参数标定、计算旋转矩阵和平移向量,根据参数化定位模型将提取到的目标点转换为机械臂坐标系位置信息,从而实现了空间定位.研究结果表明,人眼双目视觉的定位模型可以有效地提取目标点坐标,为仿生机械臂提供空间位置反馈,同时也为仿生机械臂空间位置反馈提供了新思路.

  15. 基于统计方法的高速钢凸包型仿生表面磨损量建模%Wear modeling of convex bionic surface for high speed steel based on statistical methods

    Institute of Scientific and Technical Information of China (English)

    王燕琳; 王姣; 于爱兵

    2014-01-01

    采用激光技术在W6Mo5Cr4V2高速钢试件表面加工出凸包型仿生单元。选取凸包的直径、间距和高度作为仿生单元参数,应用Box-Behnken中心组合试验设计方法,设计并进行高速钢仿生表面的摩擦磨损试验,通过回归分析,建立高速钢仿生表面磨损量与仿生单元参数之间的二阶数学模型。分别应用F检验法和相关系数检验法,验证磨损量数学模型显著。磨损量模型的预测精度分析和磨损试验表明,建立的数学模型能够描述磨损量与仿生单元参数之间的关系。通过方差分析,得到高速钢凸包型仿生单元参数对仿生表面磨损量的影响程度依次为间距、高度和直径。%Convex bionic units were fabricated on sample surface for W6Mo5Cr4V2 high speed steel material by laser processing technology. Convex diameter,spacing and height were selected as bionic unit parameters. Wear experiments of bionic surface for high speed steels were carried out with Box⁃Behnken central composite design. Second order wear mathematic model between mass loss and bionic unit parameters was established with regression analysis method. F⁃test method and correlation coefficient method were applied to finish significance test for wear mass loss model. Prediction accuracy of wear mass loss model was analyzed. And wear experiment for prediction accuracy was tested. Mathematic model can describe relationships between wear mass loss and bionic unit parameters. With variance analysis method,influence of bionic unit parameter ranking on wear mass loss is obtained as convex spacing,height and diameter.

  16. Influence of processing medium on frictional wear properties of ball bearing steel prepared by laser surface melting coupled with bionic principles

    International Nuclear Information System (INIS)

    Coupling with bionic principles, an attempt to improve the wear resistance of ball bearing steel (GCr15) with biomimetic units on the surface was made using a pulsed Nd: YAG laser. Air and water film was employed as processing medium, respectively. The microstructures of biomimeitc units were examined by scanning electron microscope and X-ray diffraction was used to describe the microstructure and identify the phases as functions of different mediums as well as water film with different thicknesses. The results indicated that the microstructure zones in the biomimetic specimens processed with water film were more refined and had better wear resistance increased by 55.8% in comparison with that processed in air; a significant improvement in microhardness was achieved by laser surface melting. The application of water film provided considerable microstructural changes and much more regular grain shape in biomimetic units, which played a key role in improving the wear resistance of ball bearing steel.

  17. Impact of airbag bionic midwifery on puerperas and newborns%气囊仿生助产术对产妇及新生儿的影响

    Institute of Scientific and Technical Information of China (English)

    尹维; 王建华

    2015-01-01

    Objective To observe the effects of airbag bionic midwifery and airbag non-bionic midwifery on puerperas and newborns. Methods Totally 240 puerperas without maternal contraindications were randomly divided observation group and control group with 120 cases in each group.The observation group was provided with automatic airbag bionic analyzer midwifery, and the control group with conventional mode of delivery.The effect of two midwifery methods on puerperas and newborns was compared.Results Compared with the control group, the observation group had lower cesarean section rate (χ2 =11.37, P<0.05) and neonatal asphyxia rate (χ2 =5.43, P<0.05).The labor ( the first stage, the second stage and total labor) shortened significantly ( t value was 12.79, 6.05 and 10.33, respectively, all P<0.05), and the incidence of postpartum hemorrhage (χ2 =7.76,P<0.05) and episiotomy rate (χ2 =8.31,P<0.05) decreased obviously in the observation group.Conclusion Using airbag bionic midwifery can significantly shorten maternal labor, reduce maternal pain and blood loss, enhance natural birth rate and reduce neonatal asphyxia rate.It is worthy of popularizing in clinics.%目的:比较气囊与非气囊仿生助产术对产妇及新生儿的影响。方法随机将240例无禁忌症的初产妇分成观察组和对照组,每组各120例。观察组产妇采用全自动气囊仿生助产仪助产分娩,对照组采用常规方式分娩,比较两组助产术对产妇和新生儿的影响。结果观察组与对照组相比,剖宫产率(χ2=11.37,P<0.05)与新生儿窒息率明显降低(χ2=5.43,P<0.05);产程(第一产程、第二产程及总产程)明显缩短(t值分别为12.79、6.05、10.33,均P<0.05);产后出血发生率(χ2=7.76, P<0.05)与会阴侧切率(χ2=8.31,P<0.05)有明显降低。结论采用气囊仿生助产术可明显缩短产妇的产程,且减少产妇的痛苦和出血量,

  18. Informed parental consent for cochlear implantation of young deaf children: social and other considerations in the use of the 'bionic ear'.

    Science.gov (United States)

    Hyde, M; Power, D

    2000-05-01

    This paper examines the social parameters surrounding the management of informed consent procedures for the parents of young deaf children for the surgical fitting of a cochlear implant ('bionic ear') to their child. Although most observers of this remarkable and well publicised medical development only see benefits in its use, the authors examine the nature of the conflict which has emerged between medical and media portrayals of the 'miracle' device and contrasting social, cultural and linguistic views of many Deaf people. The paper analyses the components of parental consent procedures for surgical implantation of their child, covering the risk-benefit analysis and, in particular, the information base that is provided for parents about the social construction of a 'Deaf life' by many Deaf people. PMID:14627014

  19. Born-Infeld extension of Lovelock brane gravity in the system of M0-branes and its application for the emergence of Pauli exclusion principle in BIonic superconductors

    Science.gov (United States)

    Sepehri, Alireza

    2016-07-01

    Recently, some authors (Cruz and Rojas, 2013 [1]) have constructed a Born-Infeld type action which may be written in terms of the Lovelock brane Lagrangians for a given dimension p. We reconsider their model in M-theory and study the process of birth and growth of nonlinear spinor and bosonic gravity during the construction of Mp-branes. Then, by application of this idea to BIonic system, we construct a BIonic superconductor in the background of nonlinear gravity. In this model, first, M0-branes link to each other and build an M5-brane and an anti-M5-brane connected by an M2-brane. M0-branes are zero dimensional objects that only scalars are attached to them. By constructing higher dimensional branes from M0-branes, gauge fields are produced. Also, if M0-branes don't link to each other completely, the symmetry of system is broken and fermions are created. The curvature produced by fermions has the opposite sign the curvature produced by gauge fields. Fermions on M5-branes and M2 plays the role of bridge between them. By passing time, M2 dissolves in M5's and nonlinear bosonic and spinor gravities are produced. By closing M5-branes towards each other, coupling of two identical fermions on two branes to each other causes that the square mass of their system becomes negative and some tachyonic states are created. For removing these tachyons, M5-branes compact, the sign of gravity between branes reverses, anti-gravity is produced which causes that branes and identical fermions get away from each other. This is the reason for the emergence of Pauli exclusion principle in Bionic system. Also, the spinor gravity vanishes and its energy builds a new M2 between M5-branes. We obtain the resistivity in this system and find that its value decreases by closing M5 branes to each other and shrinks to zero at colliding point of branes. This idea has different applications. For example, in cosmology, universes are located on M5-branes and M2-brane has the role of bridge between

  20. BIONICOL. Development of a bionic solar collector with an aluminium roll-bond absorber; BIONICOL. Entwicklung eines bionischen Solarkollektors mit Aluminium-Rollbond-Absorber

    Energy Technology Data Exchange (ETDEWEB)

    Hermann, Michael; Lunz, Karin [Fraunhofer-Institut fuer Solare Energiesysteme, Freiburg (Germany); Hillerns, Frank [TYFOROP Chemie GmbH, Hamburg (Germany)

    2010-07-01

    The authors of the contribution under consideration report on the development of a bionic solar collector with an aluminum roll-bond absorber. As part of the EU research project BIONICOL experiments and simulations are performed with respect to fluid mechanics, internal pressure stability and corrosion. First absorbers with a size of 1,060 mm x 1,820 mm are manufactured. The measured pressure loss is lower than the pressure loss of the hydraulically optimized volumetric absorber according to TREIKAUSKAS. Several studies suggest that adequate corrosion protection is achieved under conditions of stagnation, if TYFOCOR {sup registered} L in an aluminum roll bond-absorbers is used. Measurements at collectors (efficiency curve and stagnation behaviour) as well as the further development of the collector to prototypes for demonstration plants are planned as next steps.

  1. Influence of processing medium on frictional wear properties of ball bearing steel prepared by laser surface melting coupled with bionic principles

    Energy Technology Data Exchange (ETDEWEB)

    Zhou Hong, E-mail: wangct08@mails.jlu.edu.c [Key Lab of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025 (China); Wang Chengtao [Key Lab of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025 (China); Faw-Volkswagen Automotive Company Ltd., Changchun 130011 (China); Guo Qingchun [Key Lab of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025 (China); Brilliance Automobile Engineering Research Institute, Shenyang 110141 (China); Yu Jiaxiang [Key Lab of Automobile Materials, Ministry of Education, Jilin University, Changchun 130025 (China); Wang Mingxing [State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, 15 Beisihuanxi Road, Beijing 100190 (China); Liao Xunlong [Technical Management Department, CNNC China Zhongyuan Engineering Corp. Ltd., No 487 Tianlin Road, Shanghai 200233 (China); Zhao Yu [School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012 (China); Ren Luquan [Key Lab of Terrain Machinery Bionics Engineering, Ministry of Education, Jilin University, Changchun 130025 (China)

    2010-09-03

    Coupling with bionic principles, an attempt to improve the wear resistance of ball bearing steel (GCr15) with biomimetic units on the surface was made using a pulsed Nd: YAG laser. Air and water film was employed as processing medium, respectively. The microstructures of biomimeitc units were examined by scanning electron microscope and X-ray diffraction was used to describe the microstructure and identify the phases as functions of different mediums as well as water film with different thicknesses. The results indicated that the microstructure zones in the biomimetic specimens processed with water film were more refined and had better wear resistance increased by 55.8% in comparison with that processed in air; a significant improvement in microhardness was achieved by laser surface melting. The application of water film provided considerable microstructural changes and much more regular grain shape in biomimetic units, which played a key role in improving the wear resistance of ball bearing steel.

  2. 仿生扭波推进模型航行试验研究%Test of bionic robot-fish swimming by torsional wave propulsion

    Institute of Scientific and Technical Information of China (English)

    蒋小勤; 杜德锋; 李晓前; 符颖

    2013-01-01

    Based on the research of the swimming modes and physical construction of Gymnarchus niloticus fish(GNF) , a bionic robot-fish was build which can simulate the torsional wave propulsion of GNF realistically and produce a strong propulsion force so as to explore the hydrodynamic mechanism of torsional wave propulsion of the long-based flexible fin. A series of swimming experiments was made with this bionic robot-fish model in a pool. The results show that the speed of the model is proportional to the wave s frequency. The method of measuring the power of fish fin to push water in swimming was proposed. The power of fish's fin was proved to be proportional to the cubic of the wave s frequency.%为研究长鳍扭波推进的水动力性能,在对尼罗河魔鬼鱼形体构造、游动模式研究的基础上,研制了一种仿生长鳍扭波推进航行器.该推进器能逼真地模仿尼罗河魔鬼鱼长背鳍的扭波运动模式,产生强劲的水动力.在水池中开展扭波推进模型航行试验,得到了航行速度与扭波频率的关系曲线.该曲线表明:扭波推进模型的航行速度与扭波频率成正比.提出了一种测量机器鱼鱼鳍推水功率的实验方法,实验结果表明:扭波长鳍的推水功率与扭波频率的3次方成正比.

  3. SU-E-T-570: Management of Radiation Oncology Patients with Cochlear Implant and Other Bionic Devices in the Brain and Head and Neck Regions

    International Nuclear Information System (INIS)

    Purpose: To investigate the current status of clinical usage of cochlear implant (CI) and other bionic devices (BD) in the brain and head and neck regions (BH and N) and their management in patients during radiotherapy to ensure patient health and safety as well as optimum radiation delivery. Methods: Literature review was performed with both CIs and radiotherapy and their variants as keywords in PubMed, INSPEC and other sources. The focus was on CIs during radiotherapy, but it also included other BDs in BHȦN, such as auditory brainstem implant, bionic retinal implant, and hearing aids, among others. Results: Interactions between CIs and radiation may cause CIs malfunction. The presence of CIs may also cause suboptimum dose distribution if a treatment plan was not well designed. A few studies were performed for the hearing functions of CIs under irradiations of 4 MV and 6 MV x-rays. However, x-rays with higher energies (10 to 18 MV) broadly used in radiotherapy have not been explored. These higher energetic beams are more damaging to electronics due to strong penetrating power and also due to neutrons generated in the treatment process. Modern CIs are designed with more and more complicated integrated circuits, which may be more susceptible to radiation damage and malfunction. Therefore, careful management is important for safety and treatment outcomes. Conclusion: Although AAPM TG-34, TG-63, and TG-203 (update of TG-34, not published yet) reports may be referenced for management of CIs and other BDs in the brain and H and N regions, a site- and device-specified guideline should be developed for CIs and other BDs. Additional evaluation of CI functions under clinically relevant set-ups should also be performed to provide clinicians with better knowledge in clinical decision making

  4. Artificial Life Model Based on Bionic Fish%基于仿生机器鱼的人工生命模型

    Institute of Scientific and Technical Information of China (English)

    金旭东; 薛方正

    2012-01-01

    为了构建具有自学习、自适应、自协调的人工生命体,结合对鱼类生理结构和行为机理的研究和分析,提出了基于人工生命的仿生机器鱼系统。将非接触式供电技术应用于水下供电,模拟鱼类生理活动,在仿生鱼上实现了动态、无连接、不间断的电能供给,并且基于鱼类行为的层次结构,实现了"动机-行为-动作"的3层行为决策系统,引入强化学习算法,模拟鱼类与环境交互的后天学习过程。通过实物仿生鱼的游姿优化实验,证明了研究和设计工作的有效性。%In order to build self-learning, adaptive, self-coordination of intelligent agent, and combining with the research and analysis on physiological structure and behavior mechanism of natural fish, we proposed the artificial life system model of bionic fish. The paper applied non-contact power supply technology in underwater electrical supply, simulated physiological activity of natural fish, and real- ized dynamic, no-connection, uninterrupted power supply in bionic fish; Based on fish behavior hierarchy, the paper achieved the "motive-behavior-action" three layers decision-making system, and introduced the reinforcement learning algorithm to simulate environmental interaction learning process. The experiment of swim posture optimization verified the effectiveness of the research and design work.

  5. 植物甾醇烟酸酯的合成及HPLC法的测定%Synthesis of bionic ester of phytosterol and analysis of it by HPLC

    Institute of Scientific and Technical Information of China (English)

    施光宗; 洪挺; 陆豫

    2011-01-01

    The overall yield of the two-step synthesising bionic ester of phytosterol was 87. 4% and the production was validated by liquid chromatograph/mass spectrometer (HPLC/MS). Homemadebionic ester of stigmasterol for the standard substance, The HPLC methods for bionic ester of phytosterol was established ,Chromatographic condition: reversed-phase column(150 mm×4. 6 mm)filled with 5 μm Eclipse XDB C18 Column as the solid phase, mobile phase was CH3OH, flow-rate was 1. 2 mL/min, detection wavelength was 210 nm,column temperature was 35℃. The experimental results showed that the method was simple,sensitive and accurate .%采用两步法合成植物甾醇烟酸酯,产物总收率为87.4%.通过液质联用仪对产物进行验证.豆甾醇烟酸酯为标准物,应用高效液相色谱法对产物中植物甾醇烟酸酯的含量进行了分析测定.以Eclipse XDB-C18柱(4.6mm×150 mm,5μm)为分析柱,甲醇为流动相,流速是1.2 mL/min,紫外210 nm检测,柱温35℃.实验结果表明,该方法快速、简便、分离度好.

  6. Bionic imagery associated with product form design%意象关联产品形态仿生设计方法

    Institute of Scientific and Technical Information of China (English)

    袁雪青; 陈登凯; 杨延璞; 戚彬

    2014-01-01

    以生物体侧面主特征线为研究对象,提出了建立基于用户意象的仿生设计基因库思想和方法流程,旨在提高设计师对仿生原型的获取。选取生物体侧面轮廓线作为研究对象,利用贝塞尔曲线将其量化描述;通过调研获得用户期望意象形容词,经过聚类分析得到关键意象词汇并将其量化表征,输入库中获取生物原型。以u-fi猫的设计验证了该方法的合理性和可行性。%Line side of the main features in the organism for the study, it proposes the establishment of user-based imagery bionic design ideas and methods of gene libraries processes designed to improve access to designer bionic prototypes. It selects the organism side contours as the research object, uses Bezier curves to quantify the description. It gets user expectation imagery adjectives through research, critical imagery vocabulary is got through cluster analysis and quantified characteri-zation, it enters the library to obtain biologicalprototype. In u-fi cat design, it verifies rationality and feasibility of the method.

  7. 基于多元仿生的快速响应设计研究%Research on rapid response design based on multiple bionic

    Institute of Scientific and Technical Information of China (English)

    刘伟; 曹国忠; 郭德斌; 邢锡金

    2015-01-01

    To improve the efficiency of biological knowledge utilizing in the products'innovative design ,especially to support the rapid response design of products ,a multi‐bionics design method oriented to systematically functional implement was proposed .Multi biological effects coopera‐ting with biological system modeling method and technical conversion of the biological prototype was used .By comprehensively using the new products function modeling method ,the biological prototype could be converted into products'technical system satisfying the new market needs . The new method had obvious advantage over the ordinary bionics method .Lastly ,the design of a new kind rockery making instrument was used as an example to verify the practical value of the proposed theory .%为提高生物知识在产品创新设计中的利用效率,特别是对产品快速响应设计的支持,提出了一种面向系统功能实现的多元仿生设计方法。该方法以多生物效应为核心工具,配合生物系统建模方法、生物原型的技术转化方法,结合新的产品功能建模技术,能够快速地将生物原型转化成为满足市场新需求的产品技术系统,与现有技术特别是与传统仿生设计相比得以显著改良。最后利用上述理论以新型假山石制造设备的开发设计为例验证其实用性价值。

  8. SU-E-T-570: Management of Radiation Oncology Patients with Cochlear Implant and Other Bionic Devices in the Brain and Head and Neck Regions

    Energy Technology Data Exchange (ETDEWEB)

    Guo, F.Q; Chen, Z; Nath, R [Yale New Haven Hospital, New Haven, CT (United States); Yale UniversitySchool of Medicine, New Haven, CT (United States)

    2014-06-01

    Purpose: To investigate the current status of clinical usage of cochlear implant (CI) and other bionic devices (BD) in the brain and head and neck regions (BH and N) and their management in patients during radiotherapy to ensure patient health and safety as well as optimum radiation delivery. Methods: Literature review was performed with both CIs and radiotherapy and their variants as keywords in PubMed, INSPEC and other sources. The focus was on CIs during radiotherapy, but it also included other BDs in BHȦN, such as auditory brainstem implant, bionic retinal implant, and hearing aids, among others. Results: Interactions between CIs and radiation may cause CIs malfunction. The presence of CIs may also cause suboptimum dose distribution if a treatment plan was not well designed. A few studies were performed for the hearing functions of CIs under irradiations of 4 MV and 6 MV x-rays. However, x-rays with higher energies (10 to 18 MV) broadly used in radiotherapy have not been explored. These higher energetic beams are more damaging to electronics due to strong penetrating power and also due to neutrons generated in the treatment process. Modern CIs are designed with more and more complicated integrated circuits, which may be more susceptible to radiation damage and malfunction. Therefore, careful management is important for safety and treatment outcomes. Conclusion: Although AAPM TG-34, TG-63, and TG-203 (update of TG-34, not published yet) reports may be referenced for management of CIs and other BDs in the brain and H and N regions, a site- and device-specified guideline should be developed for CIs and other BDs. Additional evaluation of CI functions under clinically relevant set-ups should also be performed to provide clinicians with better knowledge in clinical decision making.

  9. Current Situation and Prospects of Bionic Cultivation of Chinese Medicinal Materials%中药材仿生栽培效益分析及其展望

    Institute of Scientific and Technical Information of China (English)

    倪鼎文

    2016-01-01

    中药材仿生栽培是根据药用植物生长发育习性及其对生态环境的要求,吸取传统农业的精华,采用现代农业生产技术,运用系统工程方法再现药用植物与外界环境的生态关系而进行中药材集约化生产的模式,具有明显的经济效益、生态效益和社会效益,实行道地中药材的仿生栽培,对保护生态环境、提高栽培药材质量、满足社会用药需求均具有重要意义,也是保证中药资源可持续发展最有效的途径。%Bionic cultivation of Chinese medicinal materials is an intensive Chinese herbal medicine production mode, applying engineering approach in reappearing ecological relationship between medical plants and external environment, adopting modern agricultural production technique, and absorbing the essence of traditional agriculture according to the growth habits of medicinal plants and their requirements on ecological environment. It has obvious economic benefits, ecological benefits and social benefits, adopts the bionic cultivation of authentic Chinese herbal medicine, which has great significance to protecting the ecological environment, improving the quality of cultivation of medicinal materials, meeting the demand of social medicine, and is also the most effective way to ensure the sustainable development of TCM resources.

  10. Current research status of identification method for Chinese materia medica based on bionic olfaction%基于仿生嗅觉的中药材鉴别方法研究现状*

    Institute of Scientific and Technical Information of China (English)

    周华英; 李钟; 刘红秀

    2016-01-01

    概述了中药材“气味”鉴别的重要地位;综述了仿生嗅觉技术机理及其在中药材鉴别领域的研究现状,同时展望了仿生嗅觉技术在中药材领域的应用前景。%The importance of "odor" identification is introduced in this paper. Then the mechanism of the bionic olfactory technology,as well as the current research status about the identification of Chinese herbal medicines based on the technology is summarized;Lastly,some conclusions and application prospect about the bionic olfactory technology in the field of Chinese materia medica will be discussed.

  11. Study on the Prevention and Control Technology of Bionic Glue for Wolfberry Jaapiella sp.%仿生胶对枸杞红瘿蚊的防控技术研究

    Institute of Scientific and Technical Information of China (English)

    张铁梅; 孙海霞; 何嘉

    2013-01-01

    This research grasps the critical prevention period of wolfberry Jaapiella sp., uses the new technology-bionic glue to develop prevention experiment for wolfberry Jaapiella sp.in park closure period and leaf expansion period of wolfberry, defines various technical prevention methods of bionic glue for wolfberry Jaapiella sp., reduces the use of chemicals and protects the quality and safety of wolfberry products.%本项研究掌握住了枸杞红瘿蚊的防治关键期,采用了仿生胶这一新型技术,在封园期和枸杞展叶期开展对枸杞红瘿蚊的防治试验,明确仿生胶防控枸杞红瘿蚊的各项技术方法,减少化学药剂的使用,保障枸杞产品质量安全。

  12. Study on Bionic Wild Cultivation Technique of Gentiana Straminea in the Qinghai-Tibet Plateau%青藏高原麻花艽仿生栽培技术研究

    Institute of Scientific and Technical Information of China (English)

    田丰; 李永平; 俞科贤; 李福安; 魏全嘉; 王有庆; 王祖训

    2012-01-01

    采用对比设计对麻花艽仿生栽培方式和常规栽培进行试验.结果表明:在青海麻花艽适生地区采用仿生栽培方式种植麻花艽更接近麻花艽的野生环境.麻花艽的出苗期、第二年返青期均早于常规栽培方式;出苗密度、返青率、单株叶片数、叶长、单株鲜重、根鲜重等均显著高于常规栽培方式;龙胆苦苷含量与常规栽培没有显著差异.仿生栽培方式的人力、物力的投入量少于常规栽培.%Comparative experiment was carried out between bionic wild and conventional cultivation of Gentiana straminea in Qinghai-Tibet plateau. The results indicated that the growth situation of Gentiana straminea planted with bionic wild cultivation was almost same with plant grown in wild environment condition in Qinghai potential growth area. Emergence period and recovering date of Gentiana straminea in following year were earlier than plants planted with conventional cultivation;seedling density, recovering rate,the number of leaves, length of leaf,fresh weight per plant and fresh weight per plant root were obviously higher than plants planted with conventional cultivation; There was no significant difference on gentiopicroside content between bionic wild and conventional cultivation. The cost of manpower and materials on bionic cultivation were less than conventional cultivation.

  13. Macrophages promote benzopyrene-induced tumor transformation of human bronchial epithelial cells by activation of NF-κB and STAT3 signaling in a bionic airway chip culture and in animal models.

    Science.gov (United States)

    Li, Encheng; Xu, Zhiyun; Zhao, Hui; Sun, Zhao; Wang, Lei; Guo, Zhe; Zhao, Yang; Gao, Zhancheng; Wang, Qi

    2015-04-20

    We investigated the role of macrophages in promoting benzopyrene (BaP)-induced malignant transformation of human bronchial epithelial cells using a BaP-induced tumor transformation model with a bionic airway chip in vitro and in animal models. The bionic airway chip culture data showed that macrophages promoted BaP-induced malignant transformation of human bronchial epithelial cells, which was mediated by nuclear factor (NF)-κB and STAT3 pathways to induce cell proliferation, colony formation in chip culture, and tumorigenicity in nude mice. Blockage of interleukin (IL)-6 or tumor necrosis factor (TNF)-α signaling or inhibition of NF-κB, STAT3, or cyclinD1 expression abrogated the effect of macrophages on malignant transformation in the bionic airway chip culture. In vivo, macrophages promoted lung tumorigenesis in a carcinogen-induced animal model. Similarly, blockage of NF-κB, STAT3, or cyclinD1 using siRNA transfection decreased the carcinogen-induced tumorigenesis in rats. We demonstrated that macrophages are critical in promoting lung tumorigenesis and that the macrophage-initiated TNF-α/NF-κB/cyclinD1 and IL-6/STAT3/cyclinD1 pathways are primarily responsible for promoting lung tumorigenesis.

  14. Hailing the bionic taxi

    Energy Technology Data Exchange (ETDEWEB)

    Kelley, T

    1990-02-01

    This article reports on the development and marketing of the GSM, a passenger vehicle capable of running on natural gas. The vehicle is being configured in three arrangements: a commercial/taxi version, a paratransit van, and as a family car. Its body is made of plastic composites which will not rust and its fenders are made from an energy absorbing foam which resumes its original shape after being dented.

  15. Bionic Lightweight Design

    OpenAIRE

    Maier, Moritz; Hollermann, Markus

    2016-01-01

    Nature has come to a range of advanced lightweight principles due to evolution. These principles can serve as models for innovative concepts of technical constructions. A corresponding expansion of the established procedure of lightweight designs to principles of nature leads to a variety of innovative lightweight construction concepts, expanding the potential for highly effective constructions.

  16. The Bionic Library.

    Science.gov (United States)

    Billings, Harold

    1991-01-01

    Discussion of the information crisis focuses on possible new forms of library collections. Topics discussed include the rising quantity and costs of publications; improvements in access through new technologies; vendors' plans using electronic text; information flow; economics factors, including user fees; and the role of the commercial sector.…

  17. A bionics chemical synapse.

    Science.gov (United States)

    Thanapitak, Surachoke; Toumazou, Christofer

    2013-06-01

    Implementation of the current mode CMOS circuit for chemical synapses (AMPA and NMDA receptors) with dynamic change of glutamate as the neurotransmitter input is presented in this paper. Additionally, circuit realisation for receptor GABA(A) and GABA(B) with an electrical signal which symbolises γ-Aminobutyric Acid (GABA) perturbation is introduced. The chemical sensor for glutamate sensing is the modified ISFET with enzyme (glutamate oxidase) immobilisation. The measured results from these biomimetics chemical synapse circuits closely match with the simulation result from the mathematical model. The total power consumption of the whole chip (four chemical synapse circuits and all auxiliary circuits) is 168.3 μW. The total chip area is 3 mm(2) in 0.35-μm AMS CMOS technology.

  18. [Towards the bionic body].

    Science.gov (United States)

    Andrieu, Bernard

    2011-06-01

    Global technological progress is enabling people to see their mutilated bodies assisted by sophisticated prostheses. Multi-disciplinary and associative care help patients relearn daily living activities and accomplish various exploits.

  19. The Bionic Amoeba.

    Science.gov (United States)

    Wright, Emmett L.

    1979-01-01

    A demonstration is described that encourages students to engage in inquiry in biology. Using chemicals and an overhead projector, the instructor can simulate a living organism projected onto a screen. The reaction can aid students in defining the characteristics of life. (SA)

  20. 基于狗獾爪趾的仿生深松铲结构设计与试验%Structure Design and Test of the Badger Claws Bionic Subsoiler

    Institute of Scientific and Technical Information of China (English)

    白景峰; 李博; 吕秀婷; 陈军; 党革荣; 史江涛

    2016-01-01

    针对现有深松铲存在的耕作阻力较大及能耗较高等问题,利用仿生学原理将狗獾爪趾的曲线应用到深松铲的结构设计中,设计了一种铲柄刃口为多项式曲线、铲尖为圆弧形的新型深松铲。为研究其耕作效果,将所设计的深松铲与国标深松铲进行了室内土槽对比试验。试验结果表明:在相同的深松试验条件下,仿生深松铲比国标深松铲的耕作阻力减小了13.33%~21.72%,仿生深松铲减阻效果明显;仿生铲柄与国标铲尖组合比国标深松铲耕作阻力减小了3.01%~7.61%,仿生铲尖与国标铲柄的组合比国标深松铲耕作阻力减小了7.67%~16.97%,仿生铲尖的减阻效果显著于仿生铲柄的减阻效果。%The problem of greater cultivation resistance , higher energy consumption and other issue exists in the tradi-tional subsoiler .In this paper , the curve of the badge claws is applied in the structural design of subsoiler according to the principle of bionics , it has designed a new subsoiler which contains the share shaft of polynomial curve and the sweep point of circular arc .In order to study the cultivation effect , we do the contrast experiment to bionic subsoiler and tra-ditional subsoiler in soil-bin laboratory.The result showed that the bionic subsoiler's tillage resistance decreased by 13 .33% ~21 .72%and the drag reduction effect was obvious in comparison to traditional subsoiler under the same test conditions .If the bionic share shaft combined with the traditional sweep point , the tillage resistance will be reduced by 3 .01%~7 .61% compared to the traditional subsoiler .While the combination of the bionic sweep point and the tra-ditional share shaft decreased by 7 .67%~16 .97% than the traditional subsoiler in the tillage resistance.Thus the difference of the drag reduction effect of the bionic sweep point and the bionic share shaft was significant .

  1. Observation of clinical application of airbag bionic midwifery instrument%气囊仿生助产仪在临床中的应用观察

    Institute of Scientific and Technical Information of China (English)

    孙芙林

    2014-01-01

    Objective to study the clinical application of airbag bionic midwifery in shortening labor and reducing postpartum hemorrhage in maternity department.Methods 200 cases of puerpera gave birth in our maternity department were selected as research subjects from July to october in 2013 in our hospital. these puerperal were 37-42+ weeks of pregnancy, with no cephalopelvic disproportion, no birth canal malformation, no antepartum hemorrhage and miyaguchi open more than 5cm and presenting part reached the ischial spine level. 100 cases who were given airbag bionic midwifery instrument for delivering by vaginal single expansion method were selected as observation group, and other 100 cases with conventional natural childbirth in the same period were selected as the control group. the stage of labor, postpartum haemorrhage and neonatal asphyxia condition were analyzed.Results The stage of labor was significantly reduced in observation group, with significant difference between two groups ( t=11.431,p0.01 ), and the minimum delivery time was 26min, the longest 4.8h, the average 2.6h. Conclusion airbag bionic midwifery which can obviously shorten the stage of labor, reduce postpartum hemorrhage, reduce the rate of cesarean section, reduce maternal and perinatal complications and improve the quality of obstetric, is the preferred method for midwifery of vaginal childbirth.%目的:探讨气囊仿生助产在产科缩短产程,减少产后出血的临床应用。方法选择2013年07月至2013年10月于本院产科分娩的200例产妇作为研究对象,选择孕37~42+周,无头盆不称,无产道畸形,无产前出血,宫口开大≥5cm 且先露部达坐骨棘水平,采用全自动气囊仿生助产仪行阴道单扩法助产分娩100例为观察组;选择同期常规自然分娩的100例为对照组。分析两组产程、产后出血及新生儿窒息情况。结果100例气囊仿生助产组产程明显缩短,两组比较有显著性差异( t=11.431,P0.01),自气

  2. 气囊仿生助产术助产528例临床分析%Clinical analysis of 528 cases of balloon bionic midwifery midwifery

    Institute of Scientific and Technical Information of China (English)

    龚代英; 陈莉媚; 韩洪霞; 邓代珍; 杜娜

    2014-01-01

    Objective:Explore the clinical value of airbag bionic midwifery.Methods: Choose 1056 cases of primipams and divide them into an observation group 528 cases(applied airbag bionic midwifery) and a control group 528 cases at random and then observe the stages of labor ,ways of delivery and perinatal condition.As a.Results:the ifrst stages of labor ,the second stages of labor and the total labor become shorter while the vaginal births improve.The perineum incision rates and cesaream section rates drop whose differences have obvious signiifcance; In the Observation Group after two hours bleeding rate reduces whose difference has statistical meanings.Both Groups have no perineum hematoma and no the cervical lacerated wounds.Postpartum hemorrhage and postpartum urinary retension never occur.Conclusion:Airbag bionic midwifery can obviously shorten the stages of labor and improve vaginal births so as to reduce the perineum incision rate and cesarean delivery rate,which obviously reduce postpartum hemorrhage.It is a convenient,effective,safe abd suitable modern midwifery,which is worth popularization and application.%目的:探讨气囊仿生助产术的临床价值。方法:选择初产妇1056例,随机分入观察组528例(应用气囊仿生助产)和对照组528例,观察两组产妇的产程、分娩方式及围产情况。结果:观察组的第一产程、第二产程及总产程缩短,阴道分娩率提高,会阴切开率及剖宫产率降低,差异有显著意义(P均<0.01);观察组产后2h出血量减少,差异有统计学意义(P<0.05)。两组均无会阴血肿、宫颈裂伤、产后出血、产后尿潴留及褥期感染发生。结论:气囊仿生助产术能显著缩短产程,提高阴道分娩率,降低会阴切开率及剖宫产率,能减少产后出血量,是一种简便、有效、安全、适宜的现代助产技术,值得推广应用。

  3. Bionic Model for Coordinated Head-eye Motion Control%头眼协调运动控制仿生模型

    Institute of Scientific and Technical Information of China (English)

    毛晓波; 陈铁军

    2011-01-01

    The relationships between eye movements and head movements of the primate during gaze shifts are analyzed in detail in the present paper. Applying the mechanisms of neurophysiology to engineering domain, we have improved the robot eye-head coordination. A bionic control strategy of coordinated head-eye motion was proposed. The processes of gaze shifts are composed of an initial fast phase followed by a slow phase. In the fast phase saccade eye movements and slow head movements were combined, which cooperate to bring gaze from an initial resting position toward the new target rapidly, while in the slow phase the gaze stability and target fixation were ensured by the action of the vestibulo-ocular reflex(VOR) where the eyes and head rotate by equal amplitudes in opposite directions. A bionic gaze control model was given. The simulation results confirmed the effectiveness of the model by comparing with the results of neurophysiology experiments.%深入分析灵长类动物在注视点转移过程中眼球运动、头部运动及头眼协调运动的关系,将头眼协调运动的神经生理机制引入工程领域,改善机器人视觉系统的头眼协调问题.提出一种仿生型机器人头眼协调运动控制策略,将注视转移过程分为初始的快相和随后的慢相两个阶段.快相组合了高速眼球扫视运动(saccade)眼球运动和缓慢的头部运动,两者协调配合迅速切换注视点至新的目标;慢相通过前庭动眼反射(VOR),依靠头和眼的等量反向旋转运动维持目标稳定的同时,调整头部位置,使其朝向目标.建立了注视转移的仿生控制模型.仿真结果与生理学实验数据进行了对比分析,证明了所提控制策略与控制模型的可行性.

  4. Design and Preparation of Bionic Camouflage Materials by Simulating Plant Leaves%植物叶片仿生伪装材料的设计与制备

    Institute of Scientific and Technical Information of China (English)

    杨玉杰; 胡碧茹; 吴文健

    2011-01-01

    设计和制备了一种新型的植物叶片仿生伪装材料,其由透明聚氯乙烯表层、叶绿素/聚乙烯醇薄膜、含水高阻隔袋和纸张四层组成.其中,透明聚氯乙烯表层提供防水性能,叶绿素封装于高隔氧材料聚乙烯醇中提高了其光稳定性,水封装于高隔水材料中降低了其蒸发散失速度,纸张提供了类植物叶片的疏松多孔结构.光谱测试结果表明,该仿生伪装材料在可见光、近红外和短波红外波段的反射光谱特征与植物叶片一致,相似度可达0.9983,室外日光照射三个月后仍能保持与植物叶片一致的反射光谱特征.该伪装材料与植物叶片光谱相似度高,耐候性好,有望可以有效对抗高光谱侦察.%A novel bionic camouflage material, which is constituted of transparent poly ( vinyl chloride) surface, chlorophyll/poly (vinyl alcohol) film, high-vapor-barrier water bag and paper, was designed and prepared by simulating plant leaves. The transparent poly (vinyl chloride) surface was used to provide waterproof capability of the camouflage material; the chlorophyll was concealed into the high-oxygen-barrier poly( vinyl alcohol) film to improve its photostability; the water was sealed into the bag of high-vapor-barrier poly( vinylidene chloride) to prevent its vaporization loss; and the paper was used to simulate the spongy mesophyll of plant leaf organs. The result of spectral tests showed that the reflectance spectra of camouflage material and plant leaves, whose similarity was 0. 9983, exhibited the same characteristics in visible, near infrared and short wave infrared wave bands, and the spectral characteristics of camouflage material did not change after three months' sunlight treatment. The bionic camouflage material, which displayed a high spectral similarity with plant leaves and a good weather resistance, is an effective method to take on reconnaissance of hyperspectral imaging hopefully.

  5. Development and experimental research of the bionic AUV propelled by turtle hydrofoil%水翼法推进的仿生AUV研制及实验

    Institute of Scientific and Technical Information of China (English)

    储定慧

    2011-01-01

    为丰富水下推进方式,进行了海龟水翼法推进技术仿生及实验研究.基于生物原型运动机理和本构特性分析,研制了仿水翼运动机构、仿蹼翼运动机构和仿生水翼法推进AUV,并进行了仿生AUV水池转首性能测试实验等,验证了运动参数变化对AUV所受纵向力分量和平面转首力矩的影响.实验结果表明,水翼拍旋角速度ω1对于AUV转首速度的影响呈降加速度正比趋势;AUV样机双翼反向差动转首因增加了涡漩阻力,比单肢转首运动的效率提高约60%等,这些为仿生AUV运动控制策略研究提供依据.%In order to enrich underwater propulsion types,the biomimetic and experimental research of turtle hydrofoil propulsion technology was carried out. Based on the analysis of motion principle and constitutive property about living prototype, the bio-hydrofoil motion machine, bio-palmiped motion machine and bionic hydrofoil propulsion AUV was developed. Then,the yawing performance test experiments of AUV in the pool were taken out, validating the influence that change of hydrofoil motion parameters effects on longitudinal component force and plane yawing torque of AUV. The experiments results indicated that, the angular velocity of hydrofoil stroke spin w, had a descending acceleration direct proportion to the yawing velocity of AUV; and the double hydrofoils contrary phase differential yawing had merely increased the motion efficiency about 60% rather than mono-limb yawing because of the much more vortex resistance around AUV. These experimental researches had already provided significant references to the study on control strategies for the bionic AUV.

  6. Bionic design of configuration of rigid wheel moving on sand and numerical analysis on its traction performance%沙地刚性轮构型仿生设计及牵引性能数值分析

    Institute of Scientific and Technical Information of China (English)

    张锐; 罗刚; 薛书亮; 杨明明; 刘芳; 张四华; 潘润铎; 李建桥

    2015-01-01

    为了提高车轮牵引性能,改善车辆在松散沙土介质环境的通过能力,该文以善于沙地奔跑的鸵鸟足部关键部位—足趾甲为仿生原型,通过仿生优化轮刺结构,设计出具有高牵引性能的仿生轮刺式沙地刚性轮,并以一种模拟月壤作为试验松散沙土介质材料,采用离散元软件PFC2D®的内置语言FISH和相关命令,建立了适用于非规则结构刚性轮的轮壤相互作用动态模拟系统,并获得试验验证。通过仿生轮刺式刚性轮与模拟月壤相互作用离散元模拟,并与矩形轮刺式刚性轮模拟结果对照,从轮下模拟月壤颗粒细观运动、接触力场、速度场以及车轮挂钩牵引力角度,验证了仿生轮刺式刚性轮具有优越的牵引性能,在车轮滑转率50%的稳定运行状态下,仿生轮刺式刚性轮的牵引性能可提高5.2%左右。该研究为提高刚性轮在松散沙土介质环境中的牵引性能提供了全新设计和研究手段。%It is very important to enhance the wheel traction performance for improving the traveling ability of the vehicle in the loose sand circumstance. The toenail, which is the key part of ostrich foot possessing the excellent running ability on sand, was regarded as the bionic prototype. Through bionic optimization of the wheel lug structure, the rigid wheel with bionic wheel lugs moving on sand with higher traction performance was designed. A kind of lunar soil simulants was selected as the experimental loose sand material. Using the built-in language FISH and the relevant command of Discrete Element Method (DEM) software PFC2D®, the dynamic simulation system, which was suitable for simulating the interactions between the rigid wheel with irregular structure and the loose sand material, was established. The simulation system was validated by the combination between laboratory test and DEM simulation. The interactions between the rigid wheel with bionic wheel lugs

  7. Bionic cutter of cutter suction dredger with ant colony optimization%绞吸式挖泥船仿生绞刀刀齿的蚁群优化

    Institute of Scientific and Technical Information of China (English)

    穆乃超; 许焕敏; 邬同舟

    2014-01-01

    为了提高绞吸式挖泥船仿生绞刀减粘降阻的效果,获得更高的生产效率和经济效益,应用蚁群算法对仿生绞刀的凸包的几何尺寸及其分布进行优化,得到对于不同类型的土壤和在一定的压力范围内所需的凸包形仿生绞刀的结构尺寸。%In order to reduce the adhesion and friction of soil, the effect of the adhesion and resistance, and gain higher productivity and economic efficiency. The application of ant colony algorithm for bionic cutter geometry and distribution of the convex hull is optimized to obtain the desired convex hull-shaped cutter biomimetic structure within different types of soil and a certain pressure range.

  8. 浅析服饰仿生艺术的表现形式%Shallow Analysis on Form of Clothing Bionic Art

    Institute of Scientific and Technical Information of China (English)

    章华霞

    2014-01-01

    在当今的服装设计领域,高科技已经为我们解决了许多过去所不能解决的问题,另一方面人们则将更多的注意力放在对审美的追求和对未来服饰发展理念的探索之上,并试图找到一些更适应时代发展的新思路。服饰仿生艺术的表现形式一直以来都是服装造型设计创作灵感的来源,如何更好的运用这种表现形式是服装设计从业人员必须面对的一个重要问题。%In the field of today's fashion design, high-tech has solved many of the past for us can't solve the problem, on the other hand, people will pay more attention to aesthetic pursuit and costumes for the future development of the concept of exploration, and try to find some more to adapt to the new train of thought on the development of era. Clothing bionic art form has long been a clothing modelling design inspiration source, how to better use the manifestation is the dress design practitioners must face an important problem.

  9. Study on the Control System of Flexible Bionic Wall-climbing Robot%柔性仿生爬壁机器人控制系统研究

    Institute of Scientific and Technical Information of China (English)

    于树林; 梅涛; 李冰; 孙少明

    2011-01-01

    Based on the research of movement mechanism of the gecko and the flexible structure of the feet theoretical and experimental, the paper proposed a new control method based on flexible bionic wall--climbing robot, the system used distributed structure based on MCU as the core controller, and made the robot stable crawl according to the precise gait planning.In the experimental environment the result showed the feasibility and validity of the method on the physical prototype.%通过对壁虎运动机理以及柔性脚掌结构的理论分析和实验研究,文中提出一种新型柔性仿壁虎爬壁机器人的控制方法,该控制系统采用以MCU为核心控制器的分布式系统,依据精确的步态规划实现了机器人的稳定爬行,在实验环境下通过实物样机验证了该方法的可行性和有效性.

  10. 仿生非光滑水田犁壁的设计及田间应用试验%Design and Applying Experiments of the Bionic Non-smooth Plow Moldboard for Paddy Field

    Institute of Scientific and Technical Information of China (English)

    金俊; 李建桥; 张广权; 李英日; 朴明哲; 黄晗

    2015-01-01

    水田犁田间作业时土壤对犁壁的严重粘附,将导致犁耕阻力增加、油耗增大、耕作质量和生产效率降低。经过大量的试验研究,已发现典型土壤动物蜣螂体表的减粘降阻和脱附效应,并据此开发了仿生犁壁。在前期研究基础上,考察仿生非光滑水田犁壁面上几何非光滑结构单元的尺寸和分布对犁耕阻力的影响,进行了设计参数优化,研制出具有减粘降阻性能的仿生非光滑水田犁壁。田间对比测试表明:仿生非光滑水田犁壁与普通光滑水田犁壁相比,降低犁耕阻力15.9%~18.0%,减少油耗11.9%,提高生产率20.5%。该犁壁耕翻的碎垡率高,耕作质量良好,有较好的实际应用前景。%Soil adhesion which exists between soil and plow moldboard in the field work of paddy field plough , not only increases the working resistance and energy consumption of these machines , but also decreases the quality of work and the productivity .It was found that the non-smooth surfaces of the typical soil animal-dung beetle had the characteristics of anti-adhesion , anti-resistance and desorption by lots of tests and observations .Based on these researchers , bionic non-smooth plow moldboards were developed .In this paper , we analyzed the plowing resistance impact of dimention and distribution of bionic non-smooth structural units , then optimized parameters ( dimention and distribution ) , developed bionic non-smooth paddy field plow moldboard that had better properties of anti-adhesion and anti-resistance .The plo-wing resistances , oil consumption and plowing productivity of bionic plow and common plow were tested in paddy field . The results showed that, compared with common smooth plough, the bionic plow moldboard could reduce plowing resistance to 15.9%~18.0%, could save the fuel consumption to 11.9%, and could raise the plowing productivity to 20 .5%.Meanwhile , the bionic non-smooth plow

  11. 仿生非光滑水田犁壁的设计及田间应用试验%Design and Applying Experiments of the Bionic Non-smooth Plow Moldboard for Paddy Field

    Institute of Scientific and Technical Information of China (English)

    金俊; 李建桥; 张广权; 李英日; 朴明哲; 黄晗

    2015-01-01

    Soil adhesion which exists between soil and plow moldboard in the field work of paddy field plough , not only increases the working resistance and energy consumption of these machines , but also decreases the quality of work and the productivity .It was found that the non-smooth surfaces of the typical soil animal-dung beetle had the characteristics of anti-adhesion , anti-resistance and desorption by lots of tests and observations .Based on these researchers , bionic non-smooth plow moldboards were developed .In this paper , we analyzed the plowing resistance impact of dimention and distribution of bionic non-smooth structural units , then optimized parameters ( dimention and distribution ) , developed bionic non-smooth paddy field plow moldboard that had better properties of anti-adhesion and anti-resistance .The plo-wing resistances , oil consumption and plowing productivity of bionic plow and common plow were tested in paddy field . The results showed that, compared with common smooth plough, the bionic plow moldboard could reduce plowing resistance to 15.9%~18.0%, could save the fuel consumption to 11.9%, and could raise the plowing productivity to 20 .5%.Meanwhile , the bionic non-smooth plow , not only with the advantages of soil-turning , but also has highly effi-ciency of clod crushing and has a good application prospect .%水田犁田间作业时土壤对犁壁的严重粘附,将导致犁耕阻力增加、油耗增大、耕作质量和生产效率降低。经过大量的试验研究,已发现典型土壤动物蜣螂体表的减粘降阻和脱附效应,并据此开发了仿生犁壁。在前期研究基础上,考察仿生非光滑水田犁壁面上几何非光滑结构单元的尺寸和分布对犁耕阻力的影响,进行了设计参数优化,研制出具有减粘降阻性能的仿生非光滑水田犁壁。田间对比测试表明:仿生非光滑水田犁壁与普通光滑水田犁壁相比,降低犁耕阻力15.9%~18.0

  12. The main function of bionic air-bag midwifery skill reducing cesarean section rate%气囊仿生助产对降低剖宫产率的主要作用

    Institute of Scientific and Technical Information of China (English)

    黄崇梅; 王英; 何林清; 张琦

    2014-01-01

    目的:分析我国剖宫产率居高不下的原因,探讨应用气囊仿生助产技术对降低剖宫产率的可行性。方法:对我院未应用气囊仿生助产术前和已使用气囊仿生助产术后在我院分娩的孕产妇,从剖宫产指征、剖产率两方面进行回顾性对照研究。结果:未应用气囊仿生助产术前剖宫产指征中社会因素占56%,医学指征占44%,剖宫产率50%。应用气囊仿生助产术后社会因素占36%,医学指征占64%,剖宫产率下降至35%。讨论:运用气囊助产在分娩过程中缩短产程,减少会阴裂伤等优势。明显减少了剖宫产的社会因素指征,使剖宫产率明显下降。所以气囊仿生助产术是降低剖宫产率的有效措施,值得推广。%Objective: To analyze the reason of high cesarean section rate in our country, to investigate the feasibility of applying bionic air-bag midwifery skil to reduce cesarean section rate.Methods: We use the indication of cesarean section and cesarean section rate to undertake retrospective study about the differences of puerperal women in our hospital who apply bionic air-bag midwifery skil or not.Results: In the indication of cesarean section that puerperal women did not apply bionic air-bag midwifery skil, social factors account for 56% and medical indication accounts for 44%.The cesarean section rate is 50%.However, In the indication of cesarean section that puerperal women apply bionic air-bag midwifery skil, social factors account for 36% and medical indication accounts for 64%.The cesarean section rate drop to 35%.Discussion:Applying bionic air-bag midwifery skil have many advantages such as shortening the stage of labor during delivery and reducing perineal laceration. It makes the social factors of cesarean section and cesarean section rate decline obviously. In summary, bionic air-bag midwifery skil is an effective measure to reduce cesarean section rate and deserves popularity.

  13. 仿鳐鱼水下机器人自主游动建模与仿真%Modeling and simulation of underwater self-propulsive bionic batoid fish robot

    Institute of Scientific and Technical Information of China (English)

    陈维山; 周杨

    2012-01-01

    随着探索海洋的呼声越来越高,仿鱼机器人的研究热潮也随之而来.在众多鱼类中,以鳐鱼为代表的胸鳍推进式鱼类具有良好的机动性,能适应复杂的海底环境.然而目前国内外对仿鳐鱼机器人的研究很少,特别是对其动力学模型和自主游动方面的研究更是不足,因而建立了仿鳐鱼机器人的物理模型,提出了一种动力学模型,并在此基础上仿真实现了仿鳐鱼机器人的自主游动,获得了与真实鳐鱼游动十分接近的速度和相同的运动规律,证明了模型和仿真的正确性.%With the requirement for the exploration of the sea increasing, the research of bionic robotic is becoming more upsurge. Taking batoid as representative of undulating pectoral fins fish which are characterized by maneuverability can adapt to the complicated benthal environment.However,fewer researches have been made to the bionic batoid fish robot,especially its dynamic modeling and self梡ropulsion in domestic.Thus establishes a physical and dynamic model of bionic batoid fish robot and the self-propulsive swimming is realized while the velocity and motion regulation approaches to the real batoid is achieved as well,which proves our modeling and simulation to be correct.

  14. Semi-bionic Extraction of Total Flavonoids from RADIX WlKSTROEMAE%半仿生法提取了哥王总黄酮的工艺研究

    Institute of Scientific and Technical Information of China (English)

    赖红芳; 吴志鸿; 邓晰朝

    2011-01-01

    [目的]研究半仿生法提取了哥王中总黄酮的最佳工艺.[方法]采用正交试验法,考察提取温度(A)、提取时间(B)、料液比(C)、乙醇体积分数(D)4个因素对提取总黄酮得率的影响.[结果]丰仿生法提取优化工艺条件是浓度70%乙醇、料液比1∶14(g:ml)、回流提取温度80℃、提取时间为70∶ 35∶35(min)提取3次.此条件下总黄酮得率为4.73%.[结论]半仿生提取法适合提取了哥王中的总黄酮.%[Objective] To study the best semi-bionic extraction technology of total flavonoids from RADIX WIKSTROEMAE. [ Method] Orthogonal experiment was carried out to investigate the effects of extraction temperature ( A) , extraction time ( B) , solid-liquid ratio ( C) , and ethanol concentration (D) on the extracting yield of total flavonoids. [Result] Hie optimal conditions for semi-bionic extraction were; 70% alcohol, l:14(g:ml) of solid-liquid ratio, and extracting at 80 ℃ for 70:35:35 min for three times, the extracting yield of flavonoids under these conditions was 4.73%. [Conclusion] Semi-bionic extraction was applicable to extracting total flavonoids from RADIX WIKSTROEMAE.

  15. 基于鸟翼后缘的仿生翼型的阻力数值模拟%Aerodynamic Performance of Bionic Foils based on Trailing Edge of Pigeon

    Institute of Scientific and Technical Information of China (English)

    陈衡; 林晓华; 成卓; 王庆五

    2011-01-01

    基于对流体介质中典型动物信鸽减阻功能的研究,揭示了其低阻力翼羽独有的序贯排列方式;量化了信鸽翅膀翼羽后缘形态特征几何信息,并建立仿生模型,其展向后缘形态可以用波长与振幅(波峰、波谷)来限定。对仿生翼型模型的气动特性进行了数值模拟。结果表明,仿生翼型结构能够改善翼型的气动性能,阻力减幅高达9.1%。%The features of drag reduction of the representative pigeon in fluid medium were studied. It was found that the flight capability of the pigeon mainly depends upon the distinct sequential array of its high lift wing feathers. Quantify the geometric information about the leading edge shape of the pigeon wing, bionic models were built in which the trailing edge shape was defined by wavelength and wavecrest to wavetrough amplitude. The finite volume method and the pressure corrected SIMPLEC algorithm were used to simulate numerically the aerodynamic performance of the bionic airfoil model. The results show that at the condition of deep stall, the bionic airfoil model can improve significantly the aeroperformance, reduce aerodynamic drag by 9.1%.

  16. Natural Bionic Design Based on Expressions of Essence, Energy and Spirit Culture in the Military Camps%基于营区精、气、神文化表达的自然仿生设计

    Institute of Scientific and Technical Information of China (English)

    郑涛; 刘宁波; 黄帅; 陈暲

    2014-01-01

    精、气、神文化是营区规划设计的核心。自然仿生设计为营区精、气、神文化的表达提供了独特而有效的方式。通过对营区精、气、神文化的解读,发掘出自然仿生的3个层面,即“形”之仿生,“意”之仿生和“结构”之仿生。在营区规划设计中,当自然仿生的这3个层面得到有效表达,实现有机统一,营区就会产生独特的文化气质与魅力,从而体现其精、气、神特色,展现部队的“军营魂”。%The essence, energy and spirit are the essence of the planning and designs of military camps. Natural bionic de⁃signs provide a unique and effective way for the expressions of the essence, energy and spirit culture in military camps. By means of interpretation of essence, energy and spirit culture in military camps, three ideas of the natural bionics is found, which are the ap⁃pearances, connotations and constructions. In the planning design of military camps, when these ideas of the natural bionics are ex⁃pressed effectively and united organically, the military camps will have the unique cultural qualities and charms. In this way, the es⁃sence, energy and spirit culture of the military camps are reflected and the soul of the army is manifested.

  17. Efficient Cutting Mechanism of the New Bionic PDC Teeth and the Experimental Study%新型仿生 PDC 齿高效切削机理及试验研究

    Institute of Scientific and Technical Information of China (English)

    刘婧; 高科; 徐小健; 李梦

    2013-01-01

    Based on the bionic coupling theory and according to non-smooth morphology of shells, mole cricket and other animals &plants, a new kind of bionic PDC tooth is developed.The analysis is made on the single tooth motion process be-fore and after the wear by abaqus finite element software and the comparative analysis is made with the stress distribution state of the common PDC teeth.It can be seen that under the same conditions, the non-smooth PDC cutting teeth have bet-ter stress value and distribution state than the common PDC ones with good rock breaking effect.In addition, the abrasion ratio test is also made on these 2 kinds of cutting teeth;the test results also prove that the PDC bionic PDC teeth have some superiority.%利用仿生耦合理论,根据贝壳和蝼蛄等动植物的非光滑形态结构研制了一种新型的仿生PDC齿,并利用有限元软件abaqus对单个齿磨损前后的运动过程进行分析,与普通PDC齿的应力分布状态进行对比,可以看出,在同等条件下,非光滑PDC切削齿的应力大小及分布情况要明显优于普通的PDC切削齿,具有良好的碎岩效果。此外还对这2种切削齿进行了磨耗比试验,试验结果进一步证明了仿生PDC齿具有一定的优越性。

  18. Dynamics Simulation and Bionic Control Platform for Biped Robot with Matlab%基于Matlab的双足机器人动力学仿真及仿生控制平台

    Institute of Scientific and Technical Information of China (English)

    王健美; 付成龙; 黄元林; 陈恳

    2011-01-01

    针对仿生控制的特点,构建了一种Matlab环境下的双足机器人动力学仿真及仿生控制平台。为了充分利用关节自身的被动特性,描述了由非外界约束引起的自由度变化,以及双足机器人在运动相态间的合理切换。同时,考虑到碰撞是机器人运动的固有特性,建立了包括碰撞在内的混合动力学模型,最终实现控制器与机器人、环境的耦合。在此平台上,对设计的仿生控制算法进行了仿真:借助机器人自身运动状态和环境交互信息,协调各个关节的动作时序,实现了低能耗的稳定行走。结果表明,该平台为双足机器人仿生控制及其运动特性分析提供了有效的仿真手段。%Aiming at bionic control,a dynamics simulation and bionic control platform for biped robot was established based on Matlab.To utilize passive locomotive characteristics of joints,the variation of degrees of freedom caused by non-environmental constraints,and the consequent transformations between different motion phases were studied.Considering impact as inevitable character of robot locomotion,the hybrid dynamics model including impact was established,and the entrainment between controller,robot,and environment were finally realized.A bionic control method was proposed and tested on this platform.Depending on states of robot and environment information,the locomotion of each joint was coordinated,and the robot could walk stably with low energy consumption.The simulation result shows this platform provides an effective simulation means for bionic control and its motion characteristics analysis.

  19. 奔跑仿生机构的运动学模型构建与分析%Kinematic Construction and Analyses for a Running Bionic Mechanism

    Institute of Scientific and Technical Information of China (English)

    宋孟军; 丁承君; 张明路

    2015-01-01

    The construction method for kinematic model and the analyses for kinematic character-istics of musculoskeletal system of cheetah was studied herein.Firstly,based on the anatomical data, the kinematic model of forelimb and hindlimb mechanism were constructed,and the running process was simulated;Secondly,based on the position of each muscle distributed on the cheetah and the con-structed kinematic model of each limb,the whole musculoskeletal system of the cheetah could be con-structed,and the length of each muscle also could be obtained based on the calculation between two at-tached points of the muscle lines;Finally,the simulation experiments for the whole model of the con-structed musculoskeletal system were done using the recorded joint angles,and the variable torques applied to each joint of forelimbs and hindlimbls were solved by using the muscular force calculation method.High speed motion characteristics of mammals were analyzed from the perspective of bionics based on the available anatomical data.Real data support was provided for the realization of bionic mechanism of high speed running mechanism.The kinematic characteristics of the high speed running of the cheetah were studied.%对猎豹的奔跑机构的骨骼肌肉系统的运动学模型及运动学特性进行了研究。基于已有数据,对猎豹的前后肢建立了机构模型,对其奔跑的运动过程进行仿真,计算并描述其趾端运动轨迹;结合骨骼肌肉的位置参数与已构建的运动学模型,对猎豹的骨肌坐标系统进行建模,对肌肉肌群的长度变化进行计算;进行骨肌坐标系统的运动仿真,并利用肌肉力计算模型,求解了猎豹前后肢各关节的力矩变化。基于已有解剖学数据对哺乳动物的高速运动特性从仿生学角度进行了分析,为高速奔跑机构仿生机理的实现提供了切实的数据支持,对猎豹高速奔跑的运动学特性进行了充分研究。

  20. On the Layout Optimization of a New Bionic Antiskid Tire Tread%新型仿生防滑轮胎花纹布局优化研究

    Institute of Scientific and Technical Information of China (English)

    王洪伟; 周利坤

    2011-01-01

    传统轮胎防滑是通过提高轮胎表面的磨擦阻力来达到防滑目的。采用章鱼吸盘原理,从轮胎花纹防滑特点和仿生学基本原理入手,是进行轮胎花纹设计的一个新的尝试。在综合考虑传统轮胎花纹设计与仿章鱼吸盘式轮胎布局优化基本要求的基础上,初步设计了五种方案,并归纳出设计公式,进而建立以距离为横坐标、有效面积为纵坐标的研究方法。最后,通过借助MATLAB仿真五种方案吸盘有效面积变化规律,表明仿章鱼吸盘的布局设计较为科学合理。%The traditional way to make tire be non-slip is to increase the friction of the tire surface. However, it is a new attempt to design tire pattern based on octopus suckers principle that starts with the pattern characteristics and bionics principle. On the basis of comprehensive consideration of the traditional pattern design and basic requirement of the optimized layout of sucker tires tread imitating octopus, we design five programs at first and sum up design formula to establish the research methods with X-axis of distance and Y-axis of the effective size. At last, with the aid of MATLAB, the change scenario laws of the effective area for five suckers are simulated, which shows that the layout design of octopus sucker imitating is more scientifically reasonable.

  1. Research on Temperature Sensing Technology for Bionic Prosthetic Hand%仿生假手的温度感知技术研究

    Institute of Scientific and Technical Information of China (English)

    田艳举; 张小栋; 张黎明

    2015-01-01

    In order to make the bionic prosthet-ic hand has maximum sensing functions,tempera-ture sensing schemes are demonstrated based on human’s need.Then temperature sensor is select-ed and measurement principle is analyzed.Accord-ing to the scheme,each module is designed.At last the whole system is obtained.With the sys-tem,simulation analysis with Proteus and experi-mental verification are finished.The experiment result shows that the prosthetic hand with temper-ature sensing system can help sense temperatures without affecting the prosthetic hand ’ s normal use.%为了使仿生假手能最大程度地模仿人手的感知功能,首先根据人类的实际需求进行温度感知方案的论证,然后针对假手的温度传感器进行选型并进行测温原理分析;根据选定的方案,进行温度感知各个模块的设计;最后搭建整个测温系统并利用 Proteus 进行仿真分析,最后针对该系统进行了实验验证,实验结果表明,具有该温度感知系统的假手能够实现待抓取物温度感知功能,且不影响假手的正常抓握。

  2. Bionic Inference of Enterprise Vitality Index System%企业生命力指标体系的仿生推论

    Institute of Scientific and Technical Information of China (English)

    艾比江; 马跃月

    2013-01-01

    企业生命力状况直接关系到企业的盛衰,如何衡量企业的生命力是企业管理界关注的问题。以仿生学为基础,结合现有文献资料推论出企业生命力的三个二级指标,即:企业生存力、企业成长力及企业再生力的指标体系,通过企业生命力的3个维度(生存力、成长力和再生力)的分析,获得的企业生命力的评价指标体系,为研判企业生命力的状况提供了分析依据。%The vitality of enterprises is directly related to the rise and fall of the enterprise, how to measure the vitality of enterprises is the focus of enterprise management problem. Based on bionics, combined with the existing literature data to infer the vitality of enterprises three second level indicators, namely: the index system of enterprise survival capacity, business growth capacity and the vitality of enterprises, by the 3 dimensions of the vitality of enterprises (survival, growth and regeneration ability) analysis, it obtained the enterprise vitality evaluation index system, so as to provide analysis basis for evaluation of the vitality of enterprises status.

  3. Bionics: prcise color tuning by interference in nature and technology-applications in surface-micromachined 1.55μm vertical air-cavity filters

    Science.gov (United States)

    Hillmer, Hartmut; Daleiden, Juergen; Prott, Cornelia; Irmer, Soeren; Roemer, Friedhard; Ataro, Edwin; Tarraf, Amer; Ruehling, H.; Maniak, Markus; Strassner, Martin

    2003-01-01

    Bionics transfers the principles of success of nature into natural science, engineering disciplines and applications. Often generation and detection of different spectral colors play key roles in communication in both, nature and technology. The latter one refers e.g. to dense wavelength division multiplex optical communication systems. This paper shows interesting parallels in tunable spectral light filtering by butterfly wings and by tunable optical filters used in optical communication systems. In both cases light interferes constructively and destructively with nano- and microstructures of appropriate shape, dimensions and materials. In this paper methodology is strongly emphasized. We demonstrate that tailored scaling allows the effectiveness of physical effects to be enhanced in nature and technology. These principles are rigorously applied in micromachined 1.55μm vertical-resonator-based filters, capable of wide, continuous, monotonic and kink-free tuning by a single control parameter. Tuning is achieved by mechanically actuating one or several membranes embedded by air-gaps in a vertical resonator including two ultra-highly reflective DBR mirrors. The layers of mirrors reveal a very strong refractive index contrast. Filters including InP/air-gap DBR's (3.5 periods) using GaInAs sacrificial layers reveal a continuous tuning of >9% of the absolute wavelength. Varying a reverse voltage (U=0 .. -3.2V) between the membranes, a tuning range up to 142nm was obtained due to electrostatic actuation. Appropriate miniaturization is shown to increase the mechanical stability and the effectiveness of spectral tuning by electrostatic actuation since the relative significance of the fundamental physical forces can be shifted considerably by appropriate scaling.

  4. 基于仿生学原理的匀矿机设计及应用%Design and Application of Uniform Mining Machine based on Bionics Principle

    Institute of Scientific and Technical Information of China (English)

    刘和生; 厉汝文; 胡书文

    2014-01-01

    我国钨矿山企业大多数仍然保留了手选工序,为提高效率需要在手选皮带传送过程中进行匀矿。现有的匀矿方法是人工操作扒齿将矿石左右扒开,存在劳动强度较大、用工多、均匀性差等问题。针对匀矿具有动作简单、重复性大的机械特点,运用仿生学原理,采集了现场操作人员的主要工作参数,采用一个曲柄滑块机构模仿扒齿的扒矿的往复运行动作,设计了一款手选匀矿机。该设备工艺简单、安装维修方便、加工制造及运行成本低、噪音小、能耗低、匀矿效果好。%Hand-picking process in the tungsten mine has problems of labor intensity and poor picking uniformity. Bionics principles are applied to design a uniform mining machine adopting a crank slider mechanism. The major working parameters of operators are collected by imitating the repetition actions. The machine has the advantages of simple operation and maintenance, low production and performance costs, low noise and energy consumption and favorable sorting results.

  5. Application of bionics design in home textiles%仿生设计在家用纺织品中的应用

    Institute of Scientific and Technical Information of China (English)

    汪文忠

    2015-01-01

    仿生设计使现代家用纺织品能够更好地满足市场和消费的个性化需求,运用到纺织品设计能使其顺应时代需求.个性化的定制和需求已成为潮流趋势,展现个体鲜明风格的同时为人们的日常生活与工作带来了美与便利,而其中所蕴含的对自然、社会的独特理解,体现"天人合一"的整体观念即"人与自然统一"观点.纺织品不再只是单纯的复制、机械、生硬的工业产品,更加充满生命活力和趣味性.%Bionics design makes modern home textiles better meet the individual demand of market and consumer. The textiles with bionics design can also adapt to the demand of the times. Individual customization and demand have become trends, which not only show distinctive style, but also bring beauty and convenience to the daily life and work of people. The design contains a unique insight into natural and social, reflecting the concept of "Unity of Man and Nature". The textiles are not merely the duplicate, mechanical and stiff industrial products, but can be full of vitality and interestingness.

  6. Design of Hexapod Bionic Robot Based on STC Microcontroller%基于STC单片机的仿生六足机器人设计

    Institute of Scientific and Technical Information of China (English)

    吴宏岐; 郭梦宇

    2013-01-01

    To satisfy the requests of special conditions for the robot, a hexapod robot is designed by using bionics principle which can mimic the motion of some animal. The STC microcontroller is used as the core of control circuit. The AET168P1 steering gear control panel is used to drive the sports joints through the YZW-Y 09G type steering gear. It can achieve each function of application requirements under software control. The robot has a strong adaptability to all sorts of the ground condition, such as it is not easy to fall into the soft ground. The system has shown its high value such as low cost,strong anti-interference capacity,high sensitivity and reliability.%为满足特殊环境对于机器人的提出的要求,应用仿生学原理,设计一六足机器人,可模仿生物的运动形式;它以STC12C5A60S2型单片机为控制核心,通过YZW-Y09G型舵机来驱动的运动关节,选用AET168P1舵机控制板,在系统软件控制下来实现其各项功能.这种仿生六足机器人对各种地面有很强的适应能力,不易陷入松软地面里,且制作成本低,抗干扰能力强、灵敏度高、安全可靠,具有较高的使用价值.

  7. Model Design of Glide Hydrofoil based on Bionics Principle%基于仿生学原理的滑翔式水翼艇模型设计

    Institute of Scientific and Technical Information of China (English)

    常军然; 谢崟; 王凡

    2013-01-01

    A model of glide hydrofoil for one man is designed in order to enrich water sports and increase entertainment , com-petitiveness.Firstly, inspired by flying fish gliding, the shape and constructure of hydrofoil is designed based on design con-cept of combining shape and structure bionics.Then, the shapes of main components and its installation positions are de-scriped in more detail, and the 3D model figure is generated.Finally, simple model of glide hydrofoil is made on the basis of design results, surface navigation test is carried out, and test result showed that jump effect of glide hydrofoil model is good. Results of the model test offer reference for the design of manned-jumping device .%  为丰富水上运动项目,增加其娱乐性和竞技性,设计了一款单人驾驶的滑翔式水翼艇模型。基于飞鱼可实现滑翔的启发,利用仿生学原理,采用形态仿生和结构仿生相结合的理念,对水翼艇进行了外形和结构设计。并对其主要零部件的外形和安装位置进行详细说明,生成了3D模型图。依据设计结果,制作了简易模型,并进行水面航行试验,跳跃效果良好。该试验结果,可为进一步研制载人水上跳跃装置提供设计依据。

  8. 人工仿生脊髓导管的制备及性能分析%Preparation and performance of a bionic spinal catheter

    Institute of Scientific and Technical Information of China (English)

    朱祥; 陈旭义; 李瑞欣; 邢冉; 李东; 涂悦

    2016-01-01

    BACKGROUND:The traditional method of preparing tissue-engineered conduit has the defects of complex shape manufacturing and uncontrolable inner space structure, which cannot meet the requirements of some micro-catheters. OBJECTIVE:To prepare a bionic spinal catheter and analyze its performance. METHODS:The data model of the conduit was established using Solid Works software, and platform scan path was generated onthree-dimensionalprinter to produce the bionic spinal catheter with fibroin and colagen as raw materials. Then the water absorption, porosity, mechanical properties and celular compatibility of the conduits were detected. Next, the conduits were implanted into the subcutaneous tissue of rats and taken out at 1, 2, 3 and 4 weeks after surgery, respectively, to observe the degradation. RESULTS AND CONCLUSION:The porosity of the conduit was (53.6±1.0)%, the water absorption was (1347±19.4)%, and the compression modulus was (0.60±0.12) MPa. The micropores distributed uniformly with different size ranging from 10 to 240 μm. Spherical or fusiform stem cels survived in the pores and densely adhered to the conduit with pseudopodia. The degradation rate ofthe conduit was 20%, 59%, 74%and 100% at 1, 2, 3 and 4 weeks after surgery, respectively. These findings indicate that the artificial bionic spinal catheter has good biocompatibility and degradability.%背景:传统的组织工程导管制造方法存在复杂外形制造困难和内部空间结构无法控制的缺陷,不能满足一些微导管所要求的精确性和空间结构复杂性。  目的:设计一种人工仿生脊髓导管,并研究其性能。  方法:采用Solid Works制图软件建立导管数据模型,在3D打印机上生成平台扫描路径,以丝素蛋白和胶原蛋白为原料,制作人工仿生脊髓导管,检测导管的吸水率、孔隙率、力学性能及细胞相容性。将人工仿生脊髓导管置入SD大鼠背部皮下,置入后1,2,3,4周

  9. 仿生电子鼻在芝麻油掺伪检测中的应用研究%Detection of adulteration in sesame oil by bionic electronic nose

    Institute of Scientific and Technical Information of China (English)

    鲁小利; 王俊

    2016-01-01

    研究并设计了一套电子鼻系统,并将基于生物嗅觉的模糊神经网络作为其模式识别算法。将该仿生电子鼻系统应用于芝麻油掺伪的检测中。实验结果显示,该系统在预测精度、收敛速度及运行时间上都取得了较好的效果,可为芝麻油以及其他农产品的在线动态监测及保真提供快速、有效的手段。%An bionic electronic nose was developed and fuzzy neural network basedon biological olfaction was used as pattern recognition algorithms. The system was applied in the detectionof adulteration in sesameoil. The results showed that the bionic electronic nose had good prediction precision,highconvergent speed and less running time,and it was a fast andcredible method in monitoring and dynamic detectionof sesameoilorother productsonline.

  10. 高温仿生机制曲在酱香习酒生产中的应用%Application of Bionic Mechanical Press in the Making of High-Temperature Daqu

    Institute of Scientific and Technical Information of China (English)

    曾凡君; 罗胜; 杨刚仁; 李中泰; 蔡勇; 谢学先; 袁小军

    2016-01-01

    Xijiu Distillery cooperated with equipment manufacturers and successfully developed the first bionic mechanical press for the mak-ing of high-temperature Daqu. Then the machine-made Daqu was applied in the production of Jiangxiang Xijiu. Compared with traditional man-made Daqu, the yield and the quality of the produced liquor got improved significantly and satisfactory production effects had been achieved in practice. Bionic machine-made Daqu might be the development direction of Daqu-making in the future. (Trans. by YUE Yang).%习酒公司在高温制曲上积极创新,与设备厂家合作并成功开发了首台仿生机械压曲机,将制作的仿生机制大曲应用到酱香习酒的生产中,其产量和质量与传统人工大曲相比有明显的进步和提高,生产效果十分显著,仿生机械制曲是未来制曲生产的发展方向。

  11. Research Advances in the Key Technology of Bionic Configuration Design of Agricultural Machinery%农机产品仿生配置设计的关键技术研究进展

    Institute of Scientific and Technical Information of China (English)

    屠立; 裘乐淼

    2012-01-01

    The aim of the configuration design of agricultural machinery was to improve the products design efficiency. The research status a-bout the configuration design technologies both at home and abroad was introduced, and the configuration model and case-based reuse technique of agricultural machineries were summarized, finally its existing problems and future research direction were pointed out. It was concluded that the bionic configuration technology has become a main research direction of machinery design methods, and the technical research framework of the bionic configuration design was presented.%农机产品配置设计的目的是为了提高产品设计效率.介绍了国内外学者对配置设计技术的研究现状,对提出的农机产品配置建模与实例重用技术进行了总结,并指出了现存问题和下一步研究方向.认为仿生配置设计技术已成为目前国内外机具产品设计方法研究的主要趋向,并给出了农机产品的仿生配置设计技术研究框架.

  12. Application of Bionics Design Method in Product Modeling Design%形态仿生设计方法在产品造型设计中的应用∗

    Institute of Scientific and Technical Information of China (English)

    金薇; 王卫星

    2015-01-01

    In the product modeling design, domestic designers relatively lack the understanding and flexibility. They neglect to explore the design of human⁃related factors. The application of bionics design method in product modeling design makes the de⁃sign trace back to nature, gives the form the life symbol, and allows people to be closer to products and become compatible with them. Bionics design method contains the vitality of life and ultimately enhances the charm of the product.%在产品造型设计方面,国内设计师的认知较为局限,设计灵活性较差,忽略了设计中很多与人相关因素的探讨。形态仿生设计方法在产品造型中的应用则使得设计回归自然,赋予产品形态生命的象征,使产品与人的距离更短,相互之间的契合度更高,让设计产品有更强的生命力,最终提升产品的魅力。

  13. Cancer-associated fibroblasts promote non-small cell lung cancer cell invasion by upregulation of glucose-regulated protein 78 (GRP78) expression in an integrated bionic microfluidic device.

    Science.gov (United States)

    Yu, Ting; Guo, Zhe; Fan, Hui; Song, Jing; Liu, Yuanbin; Gao, Zhancheng; Wang, Qi

    2016-05-01

    The tumor microenvironment is comprised of cancer cells and various stromal cells and their respective cellular components. Cancer-associated fibroblasts (CAFs), a major part of the stromal cells, are a key determinant in tumor progression, while glucose-regulated protein (GRP)78 is overexpressed in many human cancers and is involved in tumor invasion and metastasis. This study developed a microfluidic-based three dimension (3D) co-culture device to mimic an in vitro tumor microenvironment in order to investigate tumor cell invasion in real-time. This bionic chip provided significant information regarding the role of GRP78, which may be stimulated by CAFs, to promote non-small cell lung cancer cell invasion in vitro. The data showed that CAF induced migration of NSCLC A549 and SPCA-1 cells in this three-dimensional invasion microdevice, which is confirmed by using the traditional Transwell system. Furthermore, CAF induced GRP78 expression in A549 and SPCA-1 cells to facilitate NSCLC cell migration and invasion, whereas knockdown of GRP78 expression blocked A549 and SPCA-1 cell migration and invasion capacity. In conclusion, these data indicated that CAFs might promote NSCLC cell invasion by up-regulation of GRP78 expression and this bionic chip microdevice is a robust platform to assess the interaction of cancer and stromal cells in tumor environment study.

  14. Cancer-associated fibroblasts promote non-small cell lung cancer cell invasion by upregulation of glucose-regulated protein 78 (GRP78) expression in an integrated bionic microfluidic device.

    Science.gov (United States)

    Yu, Ting; Guo, Zhe; Fan, Hui; Song, Jing; Liu, Yuanbin; Gao, Zhancheng; Wang, Qi

    2016-05-01

    The tumor microenvironment is comprised of cancer cells and various stromal cells and their respective cellular components. Cancer-associated fibroblasts (CAFs), a major part of the stromal cells, are a key determinant in tumor progression, while glucose-regulated protein (GRP)78 is overexpressed in many human cancers and is involved in tumor invasion and metastasis. This study developed a microfluidic-based three dimension (3D) co-culture device to mimic an in vitro tumor microenvironment in order to investigate tumor cell invasion in real-time. This bionic chip provided significant information regarding the role of GRP78, which may be stimulated by CAFs, to promote non-small cell lung cancer cell invasion in vitro. The data showed that CAF induced migration of NSCLC A549 and SPCA-1 cells in this three-dimensional invasion microdevice, which is confirmed by using the traditional Transwell system. Furthermore, CAF induced GRP78 expression in A549 and SPCA-1 cells to facilitate NSCLC cell migration and invasion, whereas knockdown of GRP78 expression blocked A549 and SPCA-1 cell migration and invasion capacity. In conclusion, these data indicated that CAFs might promote NSCLC cell invasion by up-regulation of GRP78 expression and this bionic chip microdevice is a robust platform to assess the interaction of cancer and stromal cells in tumor environment study. PMID:27016417

  15. 基于贝壳表面形态的内燃机活塞仿生设计%Bionic design for internal engine piston based on shell surface form

    Institute of Scientific and Technical Information of China (English)

    吴波; 丛茜; 孙天宇; 刘鸿涛; 田为军

    2016-01-01

    Considering the huge numbers of internal combustion engines in use worldwide, even a small reduction in the friction of the piston⁃cylinder sleeve system would greatly impact energy conservation and emission reduction. In this paper, we use the LX⁃2V engine as a test matrix. First, we applied drag reduction and a wear⁃resistant stripe pattern on a shell's surface to the main friction pair of the internal combustion engine⁃piston skirt. We then constructed a three⁃level and three⁃factor orthogonal test plan. Under the worst skirt conditions, we analyzed the fi⁃nite element contact for the standard piston and nine bionic piston models, and obtained and compared the three most typical test indexes. We then used a range analysis method to test and optimize the design. Lastly, we selected a standard piston, a bionic piston with optimum performance, and a piston with an optimum combination on which to carry out a durability bench test of the internal combustion engine. Results show that the bionic piston performs better than the standard piston regarding the unloading of concentrated stress of the piston’ s oil return hole, drag reduction, and abrasion resistance. The average abrasion loss of the bionic piston was 42.9% less than that of the standard piston. In addition, the average cylinder pressure changing rate of the bionic piston was 50.2%more stable than that of the standard piston.%内燃机活塞-缸套系统摩擦减小对节能减排产生巨大影响。以LX-2V型汽车内燃机为试验母体。将贝壳表面的减阻、耐磨条纹形态应用于内燃机中的主要摩擦副—活塞裙部上。制定三水平三因素正交实验方案。在裙部最恶劣工况下,对标准活塞和9个仿生活塞模型进行有限元接触分析,得出三个最典型试验指标,并将其对比研究。采用极差分析法进行试验优化设计。最后,选取标准活塞、最优性能仿生活塞、最优组合活塞,进行内燃机

  16. Study on the drag reduction of the high-speed train based on the bionic non-s mooth riblets%基于仿生非光滑沟槽的高速列车减阻研究

    Institute of Scientific and Technical Information of China (English)

    杜健; 龚明; 田爱琴; 高娜; 李志伟

    2014-01-01

    In order to reduce the aerodynamic drag of the high-speed train,the geometry configuration of the bionic non-smooth riblets as an idealized model of shark skin was set up based on the bionic non-smooth theo-ry.And by means of the computational model verified with the wind tunnel test data,study on drag reduction of the bionic non-smooth riblets was carried out.The computational results show that the existence of the bionic non-smooth riblets impedes the generation of the instantaneous lateral flow caused by the turbulence,and re-duces the friction drag between the turbulence and the wall.The frictional drag coefficient in the top domain of the riblets is close to that of the smooth wall,while the frictional drag coefficient in the rest domain of the riblets is smaller than that of the smooth wall.For the different flow velocities(60 m/s~160 m/s),the drag coefficient of the non-smooth riblets wall is smaller than that of the smooth wall.Moreover,the drag reduction rate can de-crease by more than 6% for the bionic non-smooth riblets.%为减小高速列车气动阻力,根据仿生非光滑理论,以鲨鱼体表为仿生对象,建立仿生非光滑沟槽的几何外形,采用经风洞试验验证的数值模拟方法,开展仿生非光滑沟槽的减阻效果研究。计算结果表明:仿生非光滑沟槽的存在可以阻碍由湍流运动引起的瞬时横向流动的发生,降低湍流与壁面之间的摩擦阻力;沟槽顶端区域的摩擦阻力系数接近于光滑壁面的摩擦阻力系数,而其余大部分区域内的摩擦阻力系数则小于光滑壁面的摩擦阻力系数;在不同的气流速度(60~160 m/s)下,沟槽壁面的阻力系数均小于光滑壁面的阻力系数,仿生非光滑沟槽的减阻率可达6%以上。

  17. 仿生绒囊钻井液煤层气钻井应用现状与发展前景%Application state and prospects of bionic fuzzy-ball drilling fluids for coalbed methane drilling

    Institute of Scientific and Technical Information of China (English)

    郑力会

    2011-01-01

    The bionic fuzzy-ball drilling fluid was developed by imitating bacteria structure. Bionic Fuzzy-ball drilling fluid for underbalance drilling in well CLY-A shows the density of the fluid can range from 0.8 g/cm3 to 1.0 g/cm3 and it can be circulated without extra equipments. Compressed air drilling in well CLY-B proves that the different bionic fuzzy-ball additives varying drilling phases such as air, mist, foam and fuzzy-ball drilling fluid can be converted smoothly. Bionic fuzzy-ball drilling fluids for controlling and killing circulation loss in well DFS-C indicates it can control the leakage in forms of pressure reduced, pressure lost and pressure supported. The multi-branch drilling process in well FL-D shows both the cases of high viscosity with low shear rate and the low viscosity with high shear rate have good performance in cleaning wellbore and enhancing ROP. In well J-E, different formation pressure coefficients exist in the same open hole. The successful drilling proves it can improve the formation pressure bearing resistance in low-pressure section and help safe drilling in formations with narrow dynamic safe density window. Further study of bionic fuzzy-ball drilling fluid should focus on its microstructure, system type and circulation density, to satisfy more specific needs in drilling process.%仿照细菌结构开发了含仿生绒囊的钻井液.CLY-A井欠平衡钻井表明,无需附加设备,调整钻井液密度0.8~1.0 g/cm3即可循环;CLY-B井空气钻井表明,空气钻井过程中添加不同绒囊处理剂,可实现空气、雾、泡沫和绒囊不停钻转换钻井工作流体;DFS-C井防漏堵漏钻井表明,分压、耗压、撑压方式可控制钻井液漏失速度;FL-D分支井钻井表明,该钻井液具有低剪切速率下高黏度和高剪切速率下低黏度的特性,能够提高井眼清洁效率和机械钻速;J-E井不同压力系统共存于同一裸眼的井下复杂处理表明,该钻井液可以提高低压

  18. Design and Preparation of Plant Bionic Materials Based on Optical and Inf rared Features Simulation%基于光学和红外特征模拟的植物仿生材料设计制备

    Institute of Scientific and Technical Information of China (English)

    蒋晓军; 吕绪良; 潘家亮; 张拴勤

    2015-01-01

    regulate temperature on their own initiative ,which make the infrared characteristics of plants different from artificial materials . So palnt bionic materials were proposed to simulate optical and infrared characteristics of plants .By analyzing formation mecha‐nism of optical and infrared features about green plants ,the component design and heat‐transfer process of plants bionic materials were studied ,above these the heat‐transfer control formulation was established .Based on water adsorption/release compound , optical pigments and other man‐made materials ,plant bionic materials preparation methods were designed which could simulate the optical and infrared features of green plants .By chemical casting methods plant bionic material films were prepared ,which use polyvinyl alcohol as film forming and water adsorption/release compound ,and use optical pigments like chrome green and macromolecule yellow as colouring materials .The research conclusions achieved by testings figured out :water adsorption/re‐lease testing showed that the plant bionic materials with a certain thickness could absorb 1.3 kg water per square meter ,which could satisfy the water usage of transpiration simulation one day ;the optical and infrared simulated effect tests indicated that the plant bionic materials could preferably simulate the spectral reflective performance of green plants in optical wave band (380~2 500 nm ,expecially in 1 400 and 1 900 nm which were water absorption wave band of plants ) ,and also it had similar daily in‐frared radiation variations with green plants ,daily average radiation temperature difference was 0.37 ℃ ,maximum radiation temperature difference was 0.9 ℃ ;so according to the testing results ,the materials behave well plant bionic performance .

  19. 具有仿生条纹结构的内燃机活塞疲劳特性回归分析%Regression analysis of fatigue property of internal combustion engine piston with bionic stripe structure

    Institute of Scientific and Technical Information of China (English)

    吴波; 丛茜; 杨利; 刘洋; 金绍江; 王洪臣; 刘鸿涛; 田为军

    2016-01-01

    were got. Then we could observe the stress, strain and deformation of piston from coupled thermo-mechanical analysis results. Second, most animals have evolved and formed non-smooth surface, which can reduce drag and resist wear. The soil animal earthworm is one of the perfect animals, which has non-smooth surface. It shuttles back and forth in the soil, which was just like piston doing reciprocating motion in air cylinder. We copied stripes and holes from earthworm and enlarged them. The enlarging scale was decided according to piston size. Then the stripes and holes on the piston skirt were processed. The bionic piston could resist attrition and heat dissipation, and increase fatigue life. The coupled thermo-mechanical analysis results of standard piston showed that the stress of perfective aspect of piston was non-uniform. The stress was concentrated on the piston top and the third ring groove, and the maximum deformation was at the bottom of piston skirt. So this design made depth, width and space of stripe variable size. For the stripe, the closer to the top of piston, the larger the depth, width and space between columns. There were 8 stripes on the skirt from top to bottom, and every adjacent 2 stripes had the same size (1 and 2, 3 and 4, 5 and 6, 7 and 8). Third, the three-level and three-factor orthogonal array was used, and 9 testing programs of bionic pistons were made. The first factor was stripe distribution pattern, and it included 3 levels which were stripe distribution, drilling in stripe and a line of stripe with a line of bore. The second factor was stripe depth, and it included 3 levels which were A (0.8, 0.7, 0.6 and 0.5 mm), B (0.9, 0.8, 0.7 and 0.6 mm) and C (1, 0.9, 0.8 and 0.7 mm). The third factor was stripe width, and it included 3 levels which were I (0.8, 0.7, 0.6 and 0.5 mm), II (0.9, 0.8, 0.7 and 0.6 mm) and III (1, 0.9, 0.8 and 0.7 mm). The coupled thermo-mechanical analysis was carried out on 9 bionic pistons. Three typical indices that

  20. 对比度熵流仿生导航算法研究%Bionic navigation aIgorithm of contrast entropy fIow

    Institute of Scientific and Technical Information of China (English)

    王丽佳; 黄于峰; 刘建国

    2015-01-01

    飞行昆虫能够在复杂的自然环境中实现精确的导航,因此研究并借鉴飞行昆虫的导航机理,有助于开发更为高效的导航系统。飞行昆虫(以蜜蜂为代表)的视觉导航实验表明,飞行昆虫是基于图像信息流实现导航的。图像熵可以表征图像信息,为了更好地表征图像的纹理特征及空间分布,提出了对比度熵图的概念及其构造方法。借鉴光流算法及其应用于运动参数估计的思路,再结合卡尔曼滤波对结果进行优化,可得到对比度熵流仿生导航算法。实验表明,对比度熵图的导航算法比灰度熵图的导航算法有更好的导航性能。%With the facts that flying insects can achieve precise and high-speed navigation in complex natural environments,many experiments that focus on the navigation mechanism of flying insects have explored the possibilities for a more efficient,accurate and robust navigation strategy.In latest research results,it is revealed that honeybees navigate by images flowed through retinas. Concepts of entropy image and entropy flow are introduced to characterize topographic features and measure changes of the image respectively.A novel bionic visual navigation framework is proposed,integrating entropy flow with Kalman filter.To improve performance of intensity entropy image for characterizing texture feature and spatial distribution of an image,a functional concept of contrast entropy image is presented,which is applied to the proposed navigation algorithm.Comparing with simulation results of the normal intensity entropy image,a significant conclusion that contrast entropy image performs better and more robust in navigation has been made.

  1. 面向仿生的嗅觉神经系统建模研究%Research on Olfactory Neural System Model Based on Bionics

    Institute of Scientific and Technical Information of China (English)

    张锦; 朱尚武; 王莹; 黄诗苹; 王如龙

    2011-01-01

    According to the biology characteristics of olfactory neural system,an olfactory neural system integrated model was proposed based on bionics.The proposed olfactory model simulated olfactory neural system from different aspects in order to make the model similar to the characteristics of olfactory neural system as soon as possible.Firstly,to the structure of olfactory neural system,the model simulated three key parts of olfactory neural system,the delay and feedback among them based on the anatomical structure of olfactory neural system.Secondly,to the neuron model,different models were used to simulate different neurons in different parts of olfactory neural system.Finally,to the dynamics of model,the model could give response to stimulus.When the stimulus is durative,the output of model shows steady pattern.When the special stimulus is inputted,the output of model shows the pattern of limit cycle.%着眼于嗅觉神经系统的生物学特点,从仿生学角度提出了一种嗅觉神经系统整合模型。模型从不同角度进行对嗅觉神经系统进行仿真,使其尽可能贴近嗅觉神经系统的生理学特征。首先,在结构上,根据嗅觉神经系统解剖结构,完整体现了嗅觉系统的三个关键部分,以及它们之间的延时和反馈链接。其次,在神经元模型上,根据嗅觉系统不同部分的特点采用不同的神经元模型进行模拟。最后,在模型的神经动力学上,模型能够及时响应外界刺激。在刺激持续输入时,模型输出呈现出稳定的振荡模式;在特定刺激输入时,模型状态呈现有节奏的极限环状态。

  2. 一种混合驱动柔索并联仿生眼的轨迹规划%Trajectory Planning of a Bionic Eye Using Hybrid-Driven Cable Parallel Mechanism

    Institute of Scientific and Technical Information of China (English)

    谢少荣; 刘思淼; 罗均; 黄潮炯; 杨毅; 李恒宇

    2015-01-01

    在与眼球运动相关的解剖学和运动学的基础上,设计了一种符合Listing定理的基于混合驱动柔索并联机构的3自由度机器人仿生眼。通过矢量封闭方法建立了逆运动学模型,求解出柔索并联机器人的雅可比矩阵和结构矩阵。利用达朗贝尔定理建立柔索并联机器人的力矩平衡方程组,采用广义逆矩阵的相关理论,以柔索张力矢量的2范数最小为目标进行张力优化。用蒙特卡洛方法计算出仿生眼球可达工作空间。最后,在Simulink环境下进行仿真,规划运动轨迹并得到柔索并联机器人运动特性的仿真结果,证明了本文设计的机构符合Listing定理。结果表明:基于混合驱动柔索并联机构的机器人仿生眼结构合理,数学模型正确。%Based on anatomy and kinematics of human’s eyeball, a 3-DOF (degree of freedom) bionic eye with hybrid-driven cable parallel mechanism (CPM) is presented according to Listing’s law. An inverse kinematics model is built with the vector closure method, and Jacobian matrices and structure matrices of CPMs are solved. Force moment equilibrium equations of CPMs are established based on Darren Bell’s theorem. With the aim of minimizing the 2-norm of cable tension vectors, tension distribution is optimized according to generalized inverse matrix theories. The reachable work space of the bionic eye is calculated with Monte-Carlo method. Finally, the trajectories of CPMs are planned in Simulink environment, the corresponding kinematic performance results are obtained, and the designed mechanism is proven to be in accordance with Listing’s law. The result shows that the bionic eye using hybrid-driven CPM is reasonable, and the derived mathematical models are correct.

  3. 仿生射流表面孔径与射流速度耦合减阻特性数值模拟%Numerical simulation of the drag reduction characteristics of a bionic jet surface aperture coupled with jet speed

    Institute of Scientific and Technical Information of China (English)

    赵刚; 谷云庆; 赵华琳; 夏冬来; 姚建均

    2012-01-01

    In consideration of the problem of a flow field of a bionic jet surface and based on the bionic theory of the non-smooth surface the drag reduction, the jet characteristics in the shark gill area were studied, and a bionic surface model and extensible model were built. Using the turbulence model of shear-stress transport SST k-ω, the numerical simulation of a bionic jet surface model was completed. When the main flow field speed was 20 m/s, the influence of different diameters of the jet hole coupled with different jet speeds on the frictional resistance, differential pressure resistance and drag reduction ratio was analyzed. Furthermore, the drag reduction mechanism of a bionic jet surface was also studied. The results show that the average drag reduction rate reaches the maximum of 11, 566% when the jet aperture is 5mm with the jet velocity conjugated in a coupling format, laying the foundation for the research of drag reduction characteristics in the case of bionic jet surface multi-factor coupling.%针对仿生射流表面流场问题,基于非光滑表面减阻的仿生学理论,对鲨鱼鳃裂部位射流特征进行分析研究,建立具有类似于鲨鱼腮裂部位射流特征的仿生射流表面模型及可拓模型.利用SST k-ω湍流模型对仿生射流表面模型进行数值模拟,在主流场速度为20 m/s时,分析了不同射流孔径与不同射流速度耦合情况对壁面摩擦阻力、压差阻力及减阻率的影响,并对仿生射流表面减阻机理进行分析.研究表明在射流孔为5 mm时与射流速度耦合情况下的平均减阻率最大,为11.566%,同时为仿生射流表面多因素耦合情况下的减阻特性研究奠定基础.

  4. V 形仿生非光滑结构对轮胎花纹气动噪声影响%Effect of bionic V-riblet non-smooth structure on aerodynamic noise of tire tread pattern

    Institute of Scientific and Technical Information of China (English)

    周海超; 杨建; 梁晨; 王国林

    2015-01-01

    In order to explore the method for reducing noise ,the tire model of 205/55R16 was chosen as the research object ,and the effect of bionic V‐riblet non‐smooth surface on tire pattern aerodynamic noise was studied .By taking the single pitch groove volume variation information during tire rolling as the boundary condition ,the pattern aerodynamic noise model was established by computational fluid dynamics (CFD) .A noise spectrum comparison between the calculated with measured was used to validate the proposed model .Inspired by the bionic design ,the influences of bionic V‐riblet non‐smooth structure designed in the bottom of groove on pattern aerodynamic noise were analyzed .From the Reynolds stress and turbulent kinetic energy ,the noise reduction mechanism of the non‐smooth structure on pattern aerodynamic noise was revealed .The optimum bionic V‐riblet non‐smooth struc‐ture design with the maximum noise reduction was ported to the mix grooves ,and the results show that a mixed arrangement with non‐smooth structure can reduce the groove internal fluid instabilities , thus significantly reduce the noise ,w hich can reach to 4 .6 dB .%为探索降低花纹气动噪声的方法,以205/55R16半钢子午线轮胎为研究对象,研究V形仿生非光滑结构对轮胎花纹气动噪声的影响.以滚动轮胎单一节距的花纹沟体积变化信息为边界条件,采用计算流体力学建立了花纹气动噪声仿真模型,通过与试验测试声压频谱二者信息对比,说明了花纹气动噪声模型的可靠性.在此基础上,借鉴工程流体领域仿生减阻降噪的思路,研究了花纹沟底部布置不同尺寸的V形非光滑结构对花纹气动噪声的影响,从雷诺应力、湍流动能两个流体流场参数揭示了非光滑结构对花纹气动噪声降噪机理.将降噪效果最佳的V形非光滑结构移植到混合花纹沟上并进行花纹气动噪声分析,结果表明:在混合

  5. Self-Powered System of Articulated Bionic Robotic Fish Using Wave Energy Harvesting%基于波浪能获取的多关节仿生机器鱼能源自给系统

    Institute of Scientific and Technical Information of China (English)

    董二宝; 颜钦; 张世武; 杨杰

    2009-01-01

    A self-powered system of the multi-joint bionic robotic fish using wave energy to generate power by joint swing is presented to solve the energy bottleneck problem for the long-term underwater service. The frequency characteristics and energy harvesting potential of wave are analyzed according to the random wave theory. An energy harvesting system generating power by joint swing is designed, and its electromechanical model is developed. Finally, simulation and single joint swing based power generation experiment indicate that this method is effective and applicable to designing self-powered system for long-term underwater service of bionic robotic fishes.%为解决仿生机器鱼水下长期服役的能源瓶颈问题,提出利用波浪能摆动关节来发电的多关节仿生机器鱼能源自给系统.根据随机波浪理论分析了海浪的频谱特性和软能潜力,设计了利用关节摆动发电的能源获取系统,并建立该系统的机电模型.最后,通过仿真模拟和单关节摆动发电试验验证了该方法的可行性,为仿生机器鱼水下长期服役的能源自给系统设计提供了参考.

  6. 数字液压驱动技术在仿生足式机器人中的应用%The implication of digital hydraulic drive technology in bionic legged robot

    Institute of Scientific and Technical Information of China (English)

    白晶; 秦现生; 伍彬艺

    2015-01-01

    The traditional hydraulic drive method is generally used in bionic robot joint.Its energy efficiency is low, and unable for meeting the application requirements of robot high load capacity and long continuous working time independent.It analyzes the joint motion of bionic legged robot, presents a method to realize the joint driv-ing system through the use of digital hydraulic, and simulates the required flow and energy efficiency of this sys-tem, compares with the traditional hydraulic driving system.The result shows that the digital hydraulic can re-duce flow rate required and improve the energy efficiency.%仿生足式机器人关节普遍采用传统液压驱动方式,由于其能量效率不高,无法满足机器人高负载能力和自主连续工作时间的应用要求。在对机器人关节运动进行分析的基础上,提出了一种基于数字液压的关节驱动系统的实现方法,并对其所需流量和能量效率进行分析和仿真。结果表明:与传统液压相比,数字液压能减少关节驱动系统所需流量,从而提高能量效率。

  7. 基于增强学习控制器的仿生水下机器人姿态镇定研究%Reinforcement Learning Controller Based Attitude Stabilization for Bionic Underwater Robots

    Institute of Scientific and Technical Information of China (English)

    张卫武; 林龙信

    2012-01-01

    仿生水下机器人是水下机器人领域的一个重要研究方向;利用增强学习控制器对仿生水下机器人的姿态镇定问题进行了研究;增强学习控制器主要由回报函数、学习样本数据库、神经网络、动作选择以及Q学习算法等模块构成,可通过直接与环境交互生成最优动作选择策略;镇定仿生水下机器人的偏航角姿态镇定的仿真试验表明,增强学习控制器在偏航角姿态镇定方面的性能较为理想;学习样本数据库的引入显著提升了增强学习控制器的姿态镇定性能;学习样本数据库的容量对学习性能存在较大影响.%The bionic underwater robot is one of the most important fields in underwater robots. This paper discussed the attitude stabilization problem of bionic underwater robots based on the reinforcement learning controller which is composed of reward function, database of learning samples, neural network, action selection and the Q—learning algorithm. Simulation experiments about the yawing angle stabilization are carried out, and results indicate that the reinforcement learning controller has a good performance in yawing angle stabilization; the database of learning samples improves the attitude stabilization performance evidently; the capacity of the database of learning samples has a big influence on the learning performance.

  8. 基于脑机接口技术下仿生手结构设计及分析%Structural Design and Analysis of Bionic Hand Based on BCI

    Institute of Scientific and Technical Information of China (English)

    李素蕊; 于毅; 董兵超; 李振新

    2014-01-01

    The study is about the design of bionic hand based on BCI. The process of the system is following:using EEG singal as the control source,which is used to control the movement of the rionic hand by the peripheral interface circuit.In this paper,it mainly introduced a parametric three-dimensional structural model of bionic hand created by ANSYS software.The rionic hand is based on the ingenious structure ofhe human bones.Which using elastic line instead of connecting rods,coupled with a small motor to achieve the finger joints movement.Meanwhile,Based on the static and dynamic mechanical analysis to achieve mechanical analysis and motion simulation of the finger.%本研究是基于脑机接口技术下进行的仿生手的设计。其系统流程为:脑电信号作为控制源,通过外围电路接口,实现控制仿生手的运动。本文主要介绍了脑机接口技术下仿生手控制,并通过对ANSYS软件创建参数化三维仿生手结构模型的分析,来验证所设计系统的可行性。该仿生手结构是以人体巧妙的骨骼的构成原理为依据,利用弹性线代替连杆,再加以小电机来实现手指关节的运动。同时在动静力学分析的基础之上,对所设计手指进行力学分析以及运动仿真。

  9. 生态美学视角下室内环境对仿生设计的选择%The Indoor Environment's Choice of Bionic Design from the Perspective of Ecological Aesthetics

    Institute of Scientific and Technical Information of China (English)

    齐甲子

    2015-01-01

    社会经济的快速发展,一方面开始走向富裕的人们不在满足传统、老旧的居住条件,另一方面发展过程中生态破坏、环境污染对生存带来的负面影响,使人们对健康环保的人居环境成为新的追逐目标。在努力营造有利于健康的居住环境时,室内设计随之发生了革命性的变化。本文利用生态美学理论和观点来分析室内装饰的仿生设计,探讨室内装饰的形式之美、功能之美、和谐之美、特色之美,为室内装饰中仿生设计的运用找出符合生态美学特性的依据。%With the rapid development of social economy, the people who get richer are not satisfied with the traditional and old residential situations on one hand, and on the other hand the ecological damage and environment pollution bring negative influence to the existence of human beings, which makes the healthy and environmental residence become a new objective to pursue. While creating the healthy residential environment, the interior decoration is experiencing a revolutionary change. This paper aims to analyze the bionics design of interior decoration, using the theory and viewpoints of ecological aesthetics, and probe into the beauty of the interior decoration in pattern, function, harmony, and characteristic, and find out the basis of the features of ecological aesthetics for the application of bionics design in the interior decoration.

  10. 均匀设计法优选大黄半仿生提取工艺%Optimization of Semi-bionic Extraction Technology for Rhubard by Uniform Design

    Institute of Scientific and Technical Information of China (English)

    黄良永; 孟斐; 杨光义

    2014-01-01

    目的:优选大黄的半仿生提取工艺条件。方法:以芦荟大黄素、大黄酸、大黄素、大黄酚的总含量,总蒽醌含量和干浸膏得率为综合评价指标,采用均匀设计法优选大黄半仿生提取工艺。结果:通过优化并结合工业生产实际,确定三煎用水的pH依次为2.0、6.5、9.0;煎煮时间依次为:2,1,1 h。结论:本法为大黄的优化提取提供了理论依据。%Objective: To optimize semi-bionic extraction(SBE)of rhubard. Methods: The best extraction conditions of semi-bionic extraction for rhubard were optimized by uniform design with the total content of loeemodin, rhein, emodin, chrysophanol, and anthraquinone and the dried extract weight as the indices. Results:According to the optimization and the industrial production condi-tion, the pH values of water in three times of extraction were 2. 0,6. 5 and 9. 0,and the extraction time was 2, 1, 1 h, respectively. Conclusion:This method provides a theoretical basis for the optimization of rhubard extraction.

  11. Optimization of Semi-bionic Extraction Technology of Forsythia Suspensa by Uniform Design%均匀设计法优选连翘半仿生提取工艺

    Institute of Scientific and Technical Information of China (English)

    黄良永; 孟斐; 杨光义

    2014-01-01

    Objective:To optimize semi-bionic extraction(SBE)of Forsythia suspensa. Methods: The best conditions of semi-bionic extraction of Forsythia suspense were screened by uniform design with the total content of forsythoside A,and forsythin and dried extract weight as the indices. Results:The results of the uniform design were analyzed by DPS data, and combined with the industrial production conditions, the optimal extraction technology was as follows:the pH value of water in the three-time extraction was 2. 0,7. 0 and 10. 0 with the extraction time of 1. 0h,0. 5h and 0. 5h, respectively. Conclusion: The technology provides a theoretical basis for the extraction optimization of Forsythia suspensa.%目的::优选连翘的半仿生提取工艺条件。方法:以连翘酯苷A、连翘苷的含量和干浸膏得率为综合评价指标,采用均匀设计法优选连翘半仿生提取工艺。结果:通过优化试验并将试验结果经过DPS数据处理,确定最优条件并结合生产实际,确定三煎用水的pH依次为2.0,7.0,10.0;煎煮时间依次为:1,0.5,0.5 h。结论:本法为连翘的优化提取提供了理论依据。

  12. Optimization of Semi-bionic Extraction Conditions for Jinyin Qingre Oral Liquids by Uniform Design%均匀设计优选金茵清热口服液半仿生提取的工艺条件

    Institute of Scientific and Technical Information of China (English)

    叶方; 刘襄艳; 杨光义; 黄良永; 刘泽干; 杜婷

    2015-01-01

    Objective:To optimize the conditions of semi-bionic extraction for Jinyin Qingre oral liquids. Methods:The best con-ditions of the semi-bionic extraction for Jinyin Qingre oral liquids was optimized by uniform design with the yield of chlorogenic acid, geniposide and total phenolic acid, and the dried extract weight as the indices in a comprehensive evaluation. Results:The optimal pH of water for the three-time decoction was 2. 89, 6. 50 and 8. 43, respectively, and the total extraction time was 2. 0 h. Conclusion:Combined with the actual production, the pH value of water is 3. 0, 6. 5 and 8. 5 with the decoction time of 1. 0, 0. 5 and 0. 5h, re-spectively.%目的::优选金茵清热口服液半仿生提取的工艺条件。方法:采用均匀设计,以绿原酸得率,栀子苷得率,总酚酸得率和干浸膏收率为指标进行综合评价,优选金茵清热口服液半仿生提取的工艺条件。结果:优选的三煎用水pH依次为A=2.89,B=6.50,C=8.43;煎煮总时间D=2.0 h。结论:结合生产实际,确定3煎用水的pH依次为3.0,6.5,8.5;煎煮时间依次为1.0,0.5,0.5 h。

  13. The Function and Prospect of Bionics Wild Cultivation of Edible Fungi in Beijing Eco-conserving Division%食用菌仿野生栽培在北京生态涵养发展区的作用与展望

    Institute of Scientific and Technical Information of China (English)

    李金海; 胡俊; 刘松; 秦岭; 陈青君

    2011-01-01

    食用菌仿野生栽培能够有效利用人工林和天然林的大环境,产品天然优质。介绍了北京生态涵养发展区野生菌原始的生长状态、食用菌仿野生栽培的环境优势、仿野生栽培的作用、仿野生食用茵产品的优缺点、仿野生栽培适宜的种类、技术和发展前景等.%Bionics wild cultivatton of Edible fungi can make est, and with high quality product. This paper introduces the original growth status of wild mushroom, the environmental advantages of bionics wild cultivation of edible fungi, the function and species suitability of bionics wild cultivation, the advantages and disadvantages of the product, the technology and prospect, etal.

  14. Speed of bionic breaking corn ear hand and experiment on power consumption%仿生玉米掰穗装置掰穗速度与功耗试验

    Institute of Scientific and Technical Information of China (English)

    张丽萍; 李其昀

    2015-01-01

    目前国内外采用的玉米摘穗装置均存在着籽粒破损率高、含杂率高和功率消耗大等问题,为解决上述问题,该文采用模仿人工收获玉米果穗的方式,设计了仿生玉米掰穗装置。首先进行拉力测试试验,分别在静态与动态2种条件下对传统摘穗方式与仿生掰穗方式收获玉米果穗所需力进行测量,验证仿生掰穗方式可行性;然后设计仿生玉米掰穗装置试验台并进行掰穗速度与功率消耗的综合试验,得到掰穗手速度与纯功率消耗的关系。试验表明:静态传统摘穗方式与仿生掰穗方式收获玉米果穗平均所需力分别为435和41.4 N。动态传统摘穗方式与仿生掰穗方式收获果穗平均所需力分别202.5和20.7 N。仿生掰穗比传统摘穗所需力大大减少。与传统玉米收获装置相比(正常工作速度1.2 m/s),该装置功率消耗低,约为36 W,小于传统一对摘穗辊消耗的纯功率(240 W)。该研究为玉米收获机摘穗部件的改进提供了参考。%Corn has already been the first major grain crop in China and its planting area is growing quickly. Compared to the wheat mechanical harvesting, corn mechanical harvesting level is very low. For traditional corn harvesting machine, snapping device most snaps corn ear. It makes extrusion or nibbling on the corn ear caused by snapping roller, leading to the high loss rate. It hinders the development of mechanization. As the subsidies on agriculture are generous in recent years, corn harvesters have been developed rapidly. But there are also many problems that can’t be solved in current corn harvesters, such as high grain damage rate, high impurity rate and high power consumption. So a new way to pick up corn is needed urgently. In order to solve these current problems, our research team designs the bionic device of breaking corn ears. This design’s inspiration is from artificially picking up corn ears; people pick up

  15. Regenerative Engineering and Bionic Limbs

    OpenAIRE

    James, Roshan; Laurencin, Cato T.

    2015-01-01

    Amputations of the upper extremity are severely debilitating, current treatments support very basic limb movement, and patients undergo extensive physiotherapy and psychological counselling. There is no prosthesis that allows the amputees near-normal function. With increasing number of amputees due to injuries sustained in accidents, natural calamities and international conflicts, there is a growing requirement for novel strategies and new discoveries. Advances have been mad...

  16. Bionic Skin – Disartificialising architecture

    OpenAIRE

    Braun, Dirk Henning; Inhofer, Sebastian

    2016-01-01

    It has always been a basic principle of biomimicry to not just copy natural ideals. But instead of transferring all the possible advantages of natural solutions into our restricted human technologies as biomimicry is doing today, we should try to reconnect our productions and therefore ourselves further back with our natural origin. Resulting from this approach it has to be proven if the exploitation of living material and the use of genetically engineered life-forms in an architectural conte...

  17. Doric, Ionic, Bionic and Printmaking.

    Science.gov (United States)

    Hammond, Mary Alice

    1981-01-01

    Describes a combined local history/printmaking project conducted by students in grades one through nine at Armitage Academy in Kenosha, Wisconsin. Students studied and drew local buildings and printed the results as a calendar. (SJL)

  18. MULTILEVEL BIONIC ALGORITHM FOR DETECTION AND IDENTIFICATION OF SOFTWARE AND HARDWARE IMPACTS ON TELECOMMUNICATION NETWORKS Многоуровневый бионический алгоритм для обнаружения и идентификации программно-аппаратных воздействий на информационно-телекоммуникационные сети

    OpenAIRE

    Isupov A. B.

    2012-01-01

    Multilevel bionic algorithm for detection and identification of software and hardware impacts on telecommunication networks is considered in the article. The results of applying of the software implementation of the algorithm are discussed

  19. Bionic electrical stimulation of brain with medium frequency electrotherapy for treatment of cervical spondylopathy of vertebral artery type%脑仿生电刺激配合中频电疗治疗椎动脉型颈椎病

    Institute of Scientific and Technical Information of China (English)

    何南

    2012-01-01

    目的:观察脑仿生电刺激配合中频电疗(MFE)对椎动脉型颈椎病(CSA)的治疗作用.方法:CSA患者300例,随机分为观察组和对照组各150例,2组均给予药物对症支持治疗,观察组加用脑仿生电刺激配合MFE.治疗前后采用经颅多普勒(TCD)检测基底动脉(BA)、椎动脉(VA)、大脑中动脉(MCA)、大脑前动脉(ACA)平均血流速度.结果:治疗2周后,观察组BA、VA、MCA及ACA平均血流速度均较治疗前及对照组治疗后明显增快(P<0.05),对照组治疗前后比较差异无统计学意义.治疗后及6个月后随访,2组临床疗效比较,观察组总有效率均明显高于对照组(P<0.01).结论:脑仿生电刺激配合MFE对CSA患者有明显的治疗作用,可有效缓解眩晕等临床症状.%Objective:To observe the curative effectiveness of the brain bionic electrical stimulation in combination with medium frequency electrotherapy (MFE) on cervical spondylosis of vertebral artery type (CSA). Methods; Three hundreds CSA patients were randomly divided into observation group and control group (n = 150 each group). Both groups were given drug administration. The patients in observation group were given the brain bionic electrical stimulation combined with MFE additionally. Before and after treatment, transcranial Doppler (TCD) was used to measure mean blood flow velocity of basilar artery (BA) , vertebral artery (VA), middle cerebral artery (MCA) and the anterior cerebral artery(ACA). Results; After treatment for 2 weeks, the mean blood flow velocity of BA,VA, MCA and ACA in observation group was significantly increased as compared with pretreatment and control group after treatment(P<0. 05). There was no significant difference of the mean blood flow velocity in the control group before and after treatment. During a follow-up period of six months, the overall clinical effective rate in observation group was significantly higher than in control group (P<0. 01). Conclusion;The brain bionic

  20. 仿生非光滑花纹沟对轮胎抗滑水性能的影响%Study on influence of bionic non-smooth pattern groove on tire anti-hydroplaning performance

    Institute of Scientific and Technical Information of China (English)

    杨建; 王国林; 周海超; 薛开鑫

    2015-01-01

    Taking the passenger car tire 205/55R16 as the research object ,the model of hydroplaning of the deformed tire tread was built using computational fluid dynamics method .The air‐water two phase flows was applied to stimulate tire hydroplaning ,and then compared the computational critical hydroplaning speed with NASA hydroplaning predicted speed as well as velocity under tire force bal‐ance w hen tire hydroplaning occurred .Based on the hydroplaning model ,inspired by the idea that bionic non‐smooth surfaces could reduce fluid adhesion ,the effect of the V‐riblet structure with its an‐gle of 60° and height of 0 .6 mm on groove ,water displacement and flow resistance was analyzed .The effect of transplantation of the V‐riblet into the bottom of rib grooves on bionic tire hydroplaning ve‐locity was then analyzed .The results show that tire hydroplaning model can be used to research the water movement when tire hydroplaning occurs ,and the bionic non‐smooth rib grooves can improve water speed in the tire footprint and reduce water hydrodynamic pressure acted on and improve the tire hydroplaning velocity compared with origin tire .%以205/55R16乘用车轮胎为研究对象,采用计算流体动力学建立了考虑胎面花纹变形的轮胎滑水分析模型;以气‐液二相流数值模型分析了轮胎的滑水性能,并将临界滑水速度仿真值与 NASA滑水速度预测值及轮胎发生滑水时力平衡下的速度进行对比.在此基础上,引入仿生减阻理念,研究了夹角为60°、高度为0.6 mm的仿生对称V形结构对花纹沟排水量和水流阻力的影响,并将其结构特征信息等效移植到接地区轮胎花纹沟底,进行了仿生花纹轮胎的滑水性能分析.结果表明:所建滑水分析模型可用来分析轮胎滑水时的流体运动特性;相对原花纹轮胎,仿生非光滑花纹沟轮胎通过提高接地区花纹沟内水流速度,降低了胎面动水压力,提高了临界滑水速度.

  1. Investigation of electrostriction appliance and its application for bionics flapping aircraft%电致伸缩器的研制及其在仿生扑翼飞行器中的应用

    Institute of Scientific and Technical Information of China (English)

    金晓怡; 颜景平; 夏雨阳; 李德选

    2006-01-01

    A novel design for an electrostriction appliance derived from the theory and application of electromagnetics is presented. The working principle, that is the application of gravitation and elasticity together to realize the "shrinking" and "extending" effect from the distortion and transforming power into mechanical energy, is briefly explained. The characteristic parameter relationships are established and the experimental research is performed. Experimental results show that this sort of electrostriction appliance can perform well as regards driving force and beeline displacement, and furthermore, its self-weight is smaller. This makes it suitable for beeline drivers with a high application value, especially for the driver of the bionic appliance. In the application of the electrostriction appliance to a bionics-flapping aircraft, the wings can work with a flapping angle in the range of a certain value by controlling the "shrinking" and "extending" of the electrostriction appliance. It can reduce the startup power and the impact load of the driver. The flapping extent of the wings will change when the voltage which is put into the electrostriction appliance varies. This makes it more flexible as the bionics-flapping aircraft realizes different actions of flying.%提出了一种源于电磁铁理论和应用的电致伸缩器的新颖构思,简述了电致伸缩器采用引力与弹力互联以形变产生伸缩效应、将电量转化为机械量的工作原理,建立了电致伸缩器的特性参数关系,进行了电致伸缩器的实验研究.研究表明,这种电致伸缩器能获得较好的驱动力和较大的直线位移且自重较小,是一种具有较高应用价值的直线驱动器,尤其适用于生物器件的驱动.将电致伸缩器应用于仿生扑翼飞行器,通过控制电致伸缩器的"缩"和"伸",能实现翼在一定角度范围内的上下拍动.该驱动方式能减小驱动器的启动功率和整个系统的冲击载荷,通过改

  2. 基于仿生学原理的射流表面减阻性能研究%Study on drag reduction characteristics of a jet surface based on the principles of bionics

    Institute of Scientific and Technical Information of China (English)

    李芳; 赵刚; 刘维新

    2015-01-01

    针对仿生射流表面减阻问题,建立仿生射流表面模型,利用SST k-ω湍流模型对其进行数值模拟,所得射流速度曲线与实验数据吻合良好。研究射流流体对边界层厚度的影响规律,探讨仿生射流表面的减阻机理。利用4因素3水平的正交试验,对射流表面和光滑表面摩擦阻力进行对比分析,得到了射流模型参数对减阻效果和节能效果的影响规律:在不考虑外加射流能量的情况下最大减阻率达50.41%;射流速度对节能效果的影响最大,主流速度对节能效果的影响其次,节能效率与主流速度成正比,最大节能效率为276。射流改变了边界层内的流场结构,使得射流表面的边界层厚度增大,垂直于射流表面的速度梯度减小,摩擦阻力减小。%The model of the bionic jet surface was built for the study of drag reduction on the bionic jet surface.Nu-merical simulations were carried out by using SST k -ωmodel.The curves of jet velocity from simulations are in good agreement with experimental data.Furthermore, this paper studied the influence of jet fluid on the thickness of the boundary layer, and explored the drag reduction mechanism of the bionic jet surface.The comparative analysis of friction drag of the jet surface and the smooth surface were performed by using orthogonal experimental design. From the analysis, it can be found that jet model parameters contribute greatly to drag reduction and energy-saving effect.Specifically, the rate of drag reduction can be up to 50.41%without considering the external jet energy.And the jet velocity has greatest impact on energy-saving effect.Then, the influence of cross-flow velocity on energy-sav-ing effect is followed:the energy efficiency is indirect proportion to cross-flow velocity and the maximum of energy efficiency can be up to 276.It also can be found that jet has changed the flow structure in the boundary layer and increased the

  3. 凹槽形仿生针头优化设计与减阻机理分析%Optimization Design and Drag Reduction Mechanism Research on Groove Shape Bionic Needle

    Institute of Scientific and Technical Information of China (English)

    齐迎春; 丛茜; 王骥月; 齐欣

    2012-01-01

    以蚊子和蝉的口针为原形设计了凹槽形仿生针头,运用试验优化技术,通过显示动力学接触分析,证明凹槽形仿生针头具有明显减阻效果,最高减阻率可达40.94%;分析凹槽针头表面非光滑几何形态参数对注射时针头外壁所受摩擦力的影响规律,凹槽深度对摩擦力影响最大,宽度对摩擦力影响最小,凹槽深度和宽度与摩擦力呈抛物线关系,凹槽条数与摩擦力呈线性关系,随着凹槽条数增加,摩擦力减小;探讨仿生针头减阻机理,针头凹槽结构的存在可减小针头外壁与软组织的接触面积,使软组织与针头表面间存在间隙,产生空气膜,降低摩擦因数,另一方面,可使皮肤中的液体易于逸出,增加了润滑效果.依据国标,对数值分析所用的9种凹槽形仿生针头进行了穿刺试验,试验结果与数值分析结果一致.%Taken the microstructure of mosquitoes and cicada mouthparts as the prototypes, one groove shape bionic needle is design. The conclusion that the groove shape bionic needle has obvious resistance reduction effect is proved through contact dynamic analysis using the method of orthogonal design of experiment. The highest resistance reduction rate can amount to 40.94%; the influence law between the non smooth geometry parameters and the friction on the needle external wall getting in the injecting process is found out. The greatest impact factor of the friction is the groove depth, the minimum width. The relationship between the groove depth, width, and friction is a parabola. The relationship between groove number and friction is linear. The groove number increases, friction decreases. The influence order of factors and optimal levels are determined. The existence of the needle groove structure can reduce the contact area of the needle outer wall and soft tissue and this gap can produce a film of air, reducing the friction coefficient. On the other hand, the liquid can make the skin easy to

  4. 18CrMnTi钢表面激光微造型的仿生工艺%Bionic technique of laser micro-texturing on 18CrMnTi steel surface

    Institute of Scientific and Technical Information of China (English)

    钱良存; 洪炜宁; 邵陆寿; 袁根福; 梁华琪

    2011-01-01

    为了探讨激光微造型表面仿生非光滑效应中粗糙度提高的工艺,运用SEM扫描电镜和图像处理技术提取荷叶表面微纳米形貌特征,在犁铧钢(18CrMnTi)表面进行激光微造型表面仿生正交试验研究.研究表明,图像处理中Sobel边缘算法有效地提取了SEM图片表面微纳米形貌层次特征,图像阈值取255时,提取表面形貌特征最多,犁铧钢仿生表面基本上再现了荷叶表面形貌:激光表面微造型极显著因素的主次关系是阈值>打标次数>电流强度,表面仿生最优值处的微造型粗糙度参数,即表面轮廓算术平均偏差(Ra)、微观不平度十点高度(Rz)和最大轮廓高度(Ry)提高的倍数分别为86.11、232.29和116.06.研究结果为激光微造型表面仿生多层次提取表面形貌信息和提高表面粗糙度工艺提供参考.%In order to explore surface roughness technology in non-smooth bionic affection by laser micro-texturing, the orthogonal experiment was made in the plowshare (18CrMnTi) steel bionic surface, based on scan electron microscopy (SEM) photos and the technique of image processing to extract micro-nano-morphology information form lotus leaf surface. Results showed that in the processing of image Sobel edge operator was the most effective method for extracting layers information of SEM micro-nano-morphology photos. The extracted morphology information was up to maximum value at the point of threshold value 255, and surface morphology of lotus leaf was textured in the plowshare surface. The relationship of significant experimental factors was, threshold value > number of marking > current intensity. The optimal values of roughness parameters, I.e. Ra, Rz and Ry increased by 86.11, 232.29 and 116.06 times respectively. This research has significance in extracting the surface information of layers morphology and enhancing the surface roughness by laser micro-texturing bionic surface.

  5. Local Stability Analysis of Bionic Simple Supported Plate for Crane'S Top Flange%起重机上翼缘仿生简支板的局部稳定性分析

    Institute of Scientific and Technical Information of China (English)

    付为刚; 程文明; 王弘; 林炳焜

    2012-01-01

    研究面内荷载作用下起重机上翼缘仿生简支板的局部稳定性分析问题.针对起重机箱梁结构轻量化设计,上翼缘板厚度变薄导致的局部稳定性改进.借鉴与起重机上翼缘板存在相似结构、受力和功能特性的生物叶脉结构,模仿叶脉倾斜、交错等结构特征提出了叶脉斜向肋箱梁结构设计.鉴于斜板屈曲稳定性数值求解的复杂性,给出仿生简支板结构模型分析,给出约束边界条件和加载的具体实现方法.利用有限元软件结合实例分析表明,仿生简支板结构局部稳定性大大提高.简支斜板底边和高度不变时,屈曲临界载荷随倾角增大而减小;斜板底边长和倾角不变时,屈曲临界载荷随高度增大而减小.简支加劲斜板倾角θ=45 °较90 °时屈曲临界载荷提高较大.%The research on the local stability analysis of the bionic simply supported skew plate under in - plane compressive loading for the crane's top flange was carried out. In the lightweight design of the crane's box girder, the top flange plate becomes thinner, which leads to the top flange plate's local stability problem. The similarity in the structure of the top flange plate of the crane and the leaf vein, load - carrying and function were analyzed. The box girder with leaf vein's skew stiffener was given by simulating the leaf vein's skew and interlaced structure features. Because of the complexity of numerical solution for the skew plate's buckling analysis, the concrete method on the constraint boundary condition and applying load was given for the bionic simply supported skew plate. Through the a-nalysis of the case study, we found that the local stability for the bionic simply supported skew was improved greatly. For the simply supported skew plate, its buckling critical load decreased by the increasing of the angle of inclination when the bottom side length and height were unchangeable, besides, its buckling critical load decreased

  6. Bionic Oxygen humidifier to prevent microbio aerosol and nosocomial pneumonia%仿生学表面湿化防止微生物气溶胶引发医院肺炎的实验研究

    Institute of Scientific and Technical Information of China (English)

    王承竹; 曹艳琼; 王莉莉

    2009-01-01

    目的 研究常规氧疗时氧气加湿和输送过程中微生物的传播规律,寻找杜绝气溶胶产生和微生物传播的方法,探讨解决吸氧相关医院肺炎的方案.方法 应用常规入水湿化和仿生表面湿化两种装置,使用金黄色葡萄球菌人为污染湿源物质后,对吸氧管终端氧气中的金黄色葡萄球菌进行培养计数.结果 湿源物质污染金黄色葡萄球菌2.5×106/ml的当天、第2天和第3天,将氧气经过入水湿化,终端氧气中金黄色葡萄球菌计数分别为83.1、125.2、263.2 CFU/ml.相同条件下,将氧气经过表面湿化,终端氧气中未检测到金黄色葡萄球菌.氧气经过表面湿化与入水湿化相比,当天、第2天和第3天的金黄色葡萄球菌计数,差异有统计学意义(P<0.01).结论 经过常规入水湿化后,金黄色葡萄球菌可以被输送到吸氧管终端,而经过表面湿化,湿源物质中的金黄色葡萄球菌不能到达吸氧管终端.切断微生物的传播途径,将避免与吸氧相关医院肺炎的发生,对控制医院感染,保证患者安全具有重要意义.%Objective To observe how to prevent nosocomial pneumonia by cutting delivery of microbio-aero-sol to patient. Methods Two kinds of humidifier were used. One is unique bionic humidifier mimicking respiratory membrane and the other is conventional bubble humidifier. In contamination model of humidification material with S. Aureaus, the end of tube was contaminate with S. Aureaus. The amount of microbio-aerosol was compared be-tween two humidifiers. Resuls First, second and third day after the humidification material was contaminated with E. coli of 2.5×106/ml, the bacteria count in bubble humidifier group was 83.1、125.2、263.2 CFU/ml respective-ly. There was no positive culture of bacteria in bionic humidifier group. Conclusions Aureaus cannot be transmit-ted through bionic humidifier to the end of oxygen cannula, which is important for prevention of nosocomial pneumonia.

  7. 应用鱼骨图改善脑电仿生电刺激仪疗效的效果观察%Effect of fishbone diagram on improving curative effect of eeg bionic electrical stimulator

    Institute of Scientific and Technical Information of China (English)

    方丹灵; 金爱萍

    2015-01-01

    Objective:To improve the effect of eeg bionic electrical stimulator.Methods:From January to March 2014 into the standard 40 patients as control group,from April to June in 2014 patients included in the standard set for experimental group,two groups respectively by routine method,draw the fishbone diagram proposed rectification method after treatment using eeg bionic electrical stimulator,and the number of treatment time,every day,every time,period of treatment were the same.To evaluate the patients before and after the treatment respectively used MAS score method,the Barthel index,compared the re-sults.Results:The experimental group score of MAS and Barthel index were higher than the control group,the difference was statistically significant (P <0.05).Conclusion:The fishbone diagram is helpful to improve the therapeutic effect of brain dysfunction.%目的:提高脑电仿生电刺激仪疗效。方法:将2014年1~3月符合纳入标准的40例患者设为对照组,2014年4~6月符合纳入标准的40例患者设为试验组,对照组采用常规方法,试验组采用绘制鱼骨图后提出的整改方法使用脑电仿生电刺激仪进行治疗,两组每次治疗时间、每天治疗次数、疗程均相同。两组分别在治疗前后采用MAS评分法、Barthel指数对患者进行评估,比较结果。结果:试验组患者MAS评分、Barthel指数评分均高于对照组(P<0.05)。结论:鱼骨图有助于提高脑电仿生电刺激仪疗效。

  8. Bionics of Animal Behavior in Daoyin Health Preservation Origin, Classification and Modern Value%导引养生中的动物行为仿生:缘起、分类及其现代价值

    Institute of Scientific and Technical Information of China (English)

    赵海涛; 王柏利

    2015-01-01

    This paper analysis the historical and cultural background of the Daoyin Health Preservation from the view of bionics of Animal Behavior by the methods of document and data to further tap principle of Animal Behavior and the realistic significance to the contemporary society and Bio-inspiration. The paper believes that the purpose of human imitation of animal behavior is for the sake of“longevity”. Traditional Culture provided the source for Life of Bio-inspiration from Animal Behavior. Life Bio-in-spiration from Animal Behavior include animals foraging behavior and sports behavior such as animal behavior. The modern value of life of bio-inspiration from animal behavior performance is to promote the value of health and longevity, to develop bionics re-search in the field of scientific value and to relieve social pressure,also to promote the harmonious development of society.%采用文献资料法,从动物行为仿生学的角度,对导引养生形成的历史和文化背景进行深入分析。进一步挖掘传统导引养生模仿动物行为的仿生学原理,以及在当代社会和仿生学的现实意义。研究认为:人类模仿动物行为的目的是为了寻求“长生”。传统文化为导引养生的动物行为仿生提供思想源泉。导引养生中的动物行为仿生行为包含有动物觅食行为、动物运动行为等仿生行为。导引养生的动物行为仿生的现代价值表现为:促进健康长寿的时代价值、拓展仿生学研究领域的科学价值和缓解社会压力促进社会和谐发展的社会价值。

  9. 电磁防护仿生原理与故障自修复机制研究%Study on principle of electromagnetic-proof bionics and fault-restore mechanism

    Institute of Scientific and Technical Information of China (English)

    原亮; 满梦华; 常小龙

    2014-01-01

    借鉴生物神经网络信息传递的抗扰特点,开展了电磁干扰环境下通过仿生方式进行的电子电路抗扰与防护研究,以便采用新原理、新技术和新方法解决传统的电磁干扰防护手段不足的问题。通过基于布尔模型的复杂生物网络拓扑建模与简并特征分析,证明了网络简并性与功能鲁棒性之间的相互作用关系,以解决抗扰原理问题;通过构建基于神经元电路和可塑突触电路的神经网络电路模型,分析了突触权重的分布对于网络自修复特性的影响,以解决防护机制问题。进而,为电磁防护仿生原理及自修复机制的深入研究形成了一定的理论基础并完成了前期实践。%As we borrowed the wisdom from biological neural system,the characteristic of interference-proof in information transferring process has been carefully studied. Our study in-cludes the response of electrical-interference-proof circuit in electromagnetic environment,by means of bionics redesign. By doing so,new principles,new technics and new ways are adopt-ed to solve the unavoidable situations in traditional electromagnet protection design. The com-plex bionic topological networks based on Boolean model were firstly built and the charactoristic of degeneracy were analyzed,then the bidirectional actions between degeneracy in networks and the robustness of functions were proved in order to fill the gap to deal with the need of inter-ference-proof. Based on the creation of the neuron networks and the electrical synapses in char-acter of plasticity,the effective of the distribution in the weight of synapse to the character of network self-restoration was studied afterwards so that the corresponding mechanism could be defined. In this way,the research laid a theoretical foundation for electromagnetic protection and the self-restoration.

  10. 仿生创新方法及其在止回阀设计中的应用%A bionic innovation method and its application in check valve design

    Institute of Scientific and Technical Information of China (English)

    赖朝安

    2013-01-01

    Analyses the advantages and disadvantages of TRIZ methods and bionics, the innovative design approach based on a combination of TRIZ and bionics was put forward. The traditional check valves such as ball valve and wafer check valves have some shortcomings, such as the high resistance coefficient. Basing on this method, a new type of pyramid orange-peel check valve was design. When the disc is open,the peels are beside the channel;when the disc is close,the peels are in the form of pyramid, thus,it can effectively reduce the area of obstructing water. Experimental analysis was done for the flow field of the check valve. The results show that the flow resistance coefficient is much less than that of conventional check valve. It also shows that it has better capacity for water flowing and energy conservation.%针对发明问题解决理论(TRIZ)方法与仿生学的优缺点,提出基于TRIZ与仿生学相结合的仿生创新设计方法.采用该方法,针对传统止回阀如球形止回阀、对夹式止回阀等流阻系数大的缺点,设计出一种新型的金字塔型多瓣止回阀,当流体正向流动时,阀瓣打开并位于流道侧面;当流体回流时,阀瓣关闭处于斜立状态,因此可以有效地减少阀瓣开关行程,并减小对流体的阻力与作用时间,降低了流阻系数.实验证明:该止回阀阀门的流通能力很强,能起到一定的节能作用.

  11. 高灵敏度宽频带阵列式仿生矢量水听器研究%Research on the Arrayed Bionic Vector Hydrophone with High Sensitivity and Wide Frequency Band

    Institute of Scientific and Technical Information of China (English)

    宋小鹏; 薛晨阳; 张国军; 刘林仙

    2012-01-01

    针对MEMS仿生矢量水听器灵敏度和频带相互制约,不能同时满足宽频带高灵敏度测量的问题,在单个MEMS矢量水听器的基础上,设计了由四个单元构成的2×2单片集成微敏感结构阵列,实现了水听器的高灵敏度和宽频带.通过理论分析和ANSYS仿真分析,确定阵列微结构的尺寸,采用硅微机械加工工艺完成了阵列微结构的加工,最后在水声一级计量站对封装好的水听器进行了灵敏度和指向性校准测试.测试结果表明:该阵列式仿生矢量水听器未加前置放大时灵敏度达到-189 dB,频响范围20~5 000 Hz,具有良好的“8”字型指向性.%The MEMS bionic vector hydrophone, for the mutual restriction of its sensitivity and frequency band, cannot meet the requirements for the measurement of high sensitivity and wide band simultaneously. In order to solve the problem, a kind of 2 X 2 single chip integrated micro sensitive structure array consisting of four units was designed to realize the high sensitivity and wide band of the hydrophone based on a single MEMS vector hydrophone. Then, the size of the micro structure for the array was confirmed through the theoretical and ANSYS simulation analysis, and the process for the micro structure for the array was completed by adopting the process technology of the micro-machine. Finally, the test for the sensitivity and directional calibration was conducted for a sealed hydrophone at the underwater acoustic calibration laboratory. The test result indicates that the array type bionic hydrophone without the installment of a preamplifier has the sensitivity of - 189 dB, the frequency range of 20 - 5 000Hz and a good directionality in the shape of "8".

  12. Advances in Research on Siliceous Sponge Spicules: Novel Insight into the Understanding of Biomineralization Mechanisms and Bionic Applications%硅质海绵骨针矿化机制及仿生应用研究进展

    Institute of Scientific and Technical Information of China (English)

    王晓红; 汪顺锋; 甘露; Ute Schloβacher; 周峰; Klaus P. Jochum; Matthias Wiens; Heinz C.Schr(o)der; Werner E.G Müller

    2011-01-01

    硅质海绵动物是地球上最简单、最古老的多细胞动物,它经几百万年的自然进化成就了适应自然和接近完美的技术蓝图,为人类利用纳米生物技术仿生合成生物无机矿物材料提供了一种崭新的节能和"环境友好"技术,在光纤、微电子和生物医学材料等领域具有广阔的仿生应用前景.生长在深海1000 m以下水深的单根海绵动物的根须骨针长达3 m,是世界上最长的生物硅,也是生物硅化机制和仿生应用研究不多见的载体.本文系统总结了我们在单根海绵动物根须骨针结构、组成、机械性能、光物理性能、生化特性和分子生物学基础、矿化机制和生物医学领域仿生应用等方面的研究成果.%Siliceous sponges are the simplest and oldest multi-cellular animals on the Earth. They achieved a perfect technical blueprint during their million years of evolution. A new energy-saving and environmentally friendly technology has been developed by nature for human applications allowing the production of novel bio-inorganic mineral materials using nano-biotechnological approaches. There is a wide application prospect in the fields of optical fibers, microelectronics, biomedical materials and some further areas. Monorhaphis chuni lives in the deep sea over 1000 m in depth. Its giant basal spicule is growing to a length of 3 m and is therefore the largest bio-silica structure on the Earth. It is a highly suitable model for the study of bio-silicification mechanisms and for their bionic applications. In this paper, the authors systematically summarize the research progress in these giant basal spicules on the following topics: structure, composition, mechanical properties, optophysical properties, biochemical properties and molecular biological basis, biomineralization mechanism as well as bionic applications in biomedicine.

  13. Technical Condition Optimization of Semi-bionic Extraction for Kanggan Liyan Syrups by Uniform Design%均匀设计法优选抗感利咽糖浆半仿生法提取的工艺条件

    Institute of Scientific and Technical Information of China (English)

    杨洋; 黄良永; 杜士明; 杨光义

    2015-01-01

    Objective: To optimize the conditions of semi-bionic extraction for Kanggan Liyan syrups. Methods: The samples were extracted by water with different pH values under the same conditions of formula composition and dosage, extraction temperature, filtration method, water voulme, centrifugal time and concentration multiple. The best conditions of the semi-bionic extraction for Kang-gan Liyan syrups were screened by uniform design with the content of forsythoside A, polydatin, baicalin and emodin and the dried ex-tract weight as the indices. Results:The best technical conditions were as follows:the pH value of water for the 1st, 2nd and 3rd de-coction was 4. 9, 7. 5 and 9. 0, respectively, and the total extraction time was 2h. Conclusion:According to the industrial production conditions, the pH value of water for the 1st, 2nd and 3rd decoction is 5. 0, 7. 5 and 9. 0 with the extraction time of 1h,0. 5h and 0. 5h, respectively.%目的::优选抗感利咽糖浆的半仿生提取条件。方法:采用均匀设计法,在处方组成和用量、煎提温度、煎提用水量、过滤方法、离心时间、浓缩倍数等条件相同的情况下,用不同pH的水溶液提取方药,以连翘酯苷A、虎杖苷、黄芩苷、大黄素的含量及干浸膏的得率为指标,经过标准化处理,综合评价,优选该方药半仿生提取的工艺条件。结果:最佳的提取工艺为三煎用水的pH值依次为4.9、7.5、9.0,三煎总时间为2 h。结论:结合生产实际,确定三煎用水的pH值依次为5.0、7.5、9.0,3煎提取时间依次为1.0 h、0.5 h、0.5 h。

  14. 均匀设计优化荷叶半仿生提取工艺%Optimization of Semi-Bionic Extraction Process of Lotus Leaf by Uniform Design

    Institute of Scientific and Technical Information of China (English)

    郑丹丹; 刘丽娜; 王京龙; 王占一; 邓艳美

    2016-01-01

    Uniform design was used to optimize semi-bionic extraction( SBE)process of Lotus leaf. The optimum process conditions of semi-bionic extraction of Lotus leaf were studied with total flavonoids and dried extract weight as the index. Be-sides,effects of the pH value and extraction time of the three-time extraction were investigated. Spectrophotography method was conducted to determine the content of total flavonoids. Combined with the industrial production practice,the optimal ex-traction process was as follows:pH value of water in the three-time extraction was 3. 5,6. 5 and 9. 0,with the extraction time of 2. 0 h,1. 5 h and 1. 5h,respectively. The obtained method was easy and simple to operate and the extract rate of total fla-vonoids was relatively high,which provided a theoretical basis for the extraction optimization of Lotus leaf.%采用均匀设计法优选荷叶半仿生提取的最佳工艺条件.本研究以荷叶主要有效成分总黄酮得率以及干浸膏得率为评价指标,对荷叶的半仿生提取工艺条件进行优选,考察三煎pH、提取总时间对荷叶总黄酮提取率的影响,采用分光光度法测定总黄酮的含量.通过优化实验并结合生产实际,确定荷叶半仿生提取的最佳工艺为3煎pH依次为3.5、6.5、9.0,3煎时间依次为2.0 h、1.5 h、1.5 h,所得荷叶总黄酮的提取率为9.7﹪.本法操作简便,提取率较高,为荷叶总黄酮提取工艺的改进提供了理论依据.

  15. 智能仿生玻璃清洁机器人造型设计及功能配置%Modeling Design and Function Configuration of Intelligent Bionic Glass-cleaning Robot

    Institute of Scientific and Technical Information of China (English)

    邵翌鑫

    2016-01-01

    A type of intelligent bionic glass-cleaning robot, Spider Crab, has been designed to deal with the dangers and difficult operation issues during the aerial glass cleaning work.The overall style design and function configuration are arranged by using the research results of robots and the possible problems occurred during the aerial glass cleaning are analyzed.This robot is equipped with self-charging,cleaning selection,multi-protection and some other functions,it has an extensive application range and high adaptability.%针对高空玻璃清洁作业中存在的危险性高、操作困难的问题,设计了一款智能仿生玻璃清洁机器人Spider Crab.在分析高空玻璃清洁过程中可能出现的问题,借鉴有关机器人研究成果的基础上,进行了机器人整体造型设计及功能配置.该机器人具有自我充电、选择清洁、多重保护等功能,应用范围广,适应性强.

  16. Application of Bionic Design in Design of City Public Space%浅析仿生设计在城市公共空间设计中的应用

    Institute of Scientific and Technical Information of China (English)

    刘斯荣; 贾婧

    2012-01-01

    Construction and utilization of public space plays a more and more important role in the plan and construction of modern city. It embodies the characteristics of city, and is the ties of human and nature. The use of bionics riches the designing method of city public space, and is the headspring of design innovation. It promotes the use of ecological idea in landscape design, which is significant and has vast potential for future development.%在现代城市的规划建设中,公共空间的建设和利用有着越来越重要的作用.它是彰显城市个性特色的重要载体,是人们与大自然交流的纽带.仿生学的渗透丰富了城市公共空间的设计的形式语言,成为设计创新的源泉,促使生态理念运用于景观设计的更深层次,具有深远的意义和广阔的发展前景.

  17. 仿生优化算法在片上网络映射的应用研究%The Application of Bionic Optimization Algorithm in NoC Mapping

    Institute of Scientific and Technical Information of China (English)

    胡伟; 欧阳一鸣

    2011-01-01

    System on Chip has been developed to Network on-chip stage at which the energy consumption of NoC technology has become the main constraint.Biological bionic algorithm and ant colony optimization algorithm are adopted in NoC mapping to optimize energy consumption.Experimental results show that ant colony optimization algorithm using a good local search algorithm can quickly converge,and 15%-40% of the communication energy consumption can be reduced depending on its various applications.%片上系统发展到片上网络阶段,能耗问题已经成为片上网络技术的重要约束。在片上网络映射中应用了生物仿生算法—蚁群优化算法使系统能耗达到优化,实验表明蚁群优化算法运用较好的局部搜索算法可以很快地收敛,针对不同的应用,可以减少15%-40%的通讯能耗。

  18. 基于仿生色彩对福建高校校园铺地色彩设计的探讨%Discussion about Pavement Color Design in Fujian University Campus based on Bionic Color

    Institute of Scientific and Technical Information of China (English)

    刘仁芳

    2013-01-01

    The colors of University Campus have important significance for inheriting campus culture and building a harmonious environment. After practice investigation and research, the article discusses discussed the application of bionic color in the pavementcolor design of Fujian university campus, put forward that biological color image and its style can be used in the pavement color design of Fujian university campus after been scientific integrated and designed.%  高校校园色彩对传承校园文化,营造和谐校园环境具有重要意义。通过调查研究,探讨仿生色彩在福建高校校园铺地色彩设计中的应用,并提出把生物色彩形象和生物色彩形式经过科学的整合与设计应用到福建高校校园铺地色彩设计当中。

  19. 煤炭输送带表面对煤粉的仿生脱附研究%Bionic Anti-adhesive Study Between the Coal Conveyor Belt Surface and the Coal

    Institute of Scientific and Technical Information of China (English)

    李晶; 徐成宇; 曾丽娜

    2013-01-01

    分析了煤炭带式输送机输送带表面与煤粉粘附现象,从生物体表自洁现象中得到启示,利用生物仿生学原理,提出改善输送带表面形貌以达到与煤粉脱附的目的.以荷叶表面结构形貌为原型,分析其微观结构形貌,运用相似工程学原理设计出一种具有凸包结构的输送带表面形貌,以达到有效脱附煤粉,并建立该结构的实体模型.%With analysis of the phenomenon that coal fines adsorb to the belt surface on coal conveyor,a new idea focused on improvement in the surface topography of conveyor belt to decrease adhesion of coal fines is presented on the basis of inspiration from the biological self-cleaning phenomenon and perspective of bionics.The surface topography with papillary structure of conveyor belt surface is designed on the basis of Lotus-leaf-likes surface with analysis of its microstructure in accordance with similarity principle.The new structure could effectively prevent coal fines from adhering to conveyor belt surface.A model of the new structure is also built.

  20. Jamming of fingers: an experimental study to determine force and deflection in participants and human cadaver specimens for development of a new bionic test device for validation of power-operated motor vehicle side door windows.

    Science.gov (United States)

    Hohendorff, Bernd; Weidermann, Christian; Pollinger, Philipp; Burkhart, Klaus J; Müller, Lars Peter

    2013-02-01

    The deformability of human fingers is central to addressing the real-life hazard of finger jamming between the window and seal entry of a power-operated motor vehicle side door window. The index and little fingers of the left hand of 109 participants and of 20 cadaver specimens were placed in a measurement setup. Participants progressively jammed their fingers at five different dorsal-palmar jam positions up to the maximum tolerable pain threshold, whereas the cadaver specimens were jammed up to the maximum possible deflection. Force-deflection curves were calculated corresponding to increasing deflection of the compressed tissue layers of the fingers. The average maximum force applied by the participants was 42 N to the index finger and 35 N to the little finger. In the cadaver fingers, the average of the maximum force applied was 1886 N for the index finger and 1833 N for the little finger. In 200 jam positions, 25 fractures were observed on radiographs; fractures occurred at an average force of 1485 N. These data assisted the development of a prototype of a bionic test device for more realistic validation of power-operated motor vehicle windows.

  1. Rational, Organic, Ecological:Research on the Thought of Bionic during the Western Urban Planning Development Process%理性·有机·生态--西方城市规划发展历程中的仿生思维研究

    Institute of Scientific and Technical Information of China (English)

    孔俊婷; 王浩然

    2015-01-01

    Taking the natural organism as basic object, bionic thought is a way to recreate with the growth mechanism and functional form of the organisms. Based on the contrast and analysis about typical theories and cases, the article analyzes the relationship between the bionic thought and western urban planning, then makes the conclusion that while western urban planning concept changes from rationalism oriented to organism and ecologism, the view of bionic thought also improves from mechanical imitation to integrated-organic view of cities and eco-friendly concept of development. It has important reference and guiding significance for the study on the urban and rural planning during the process of current urbanization development in our country.%仿生思维是以自然界中的有机体为基本对象,以其生长机理和功能构成为主体进行再创造的一种思维方式。本文通过对典型理念和案例的剖析比对,分析研究了仿生思维与西方城市规划之间的关系,揭示出在西方城市规划理念由理性主义为主导向有机主义和生态主义观念演变的过程中,仿生思维由最初的机械模仿逐渐上升为动态有机的城市观和生态可持续的发展观。这对我国当前城镇化发展进程中的城乡规划研究具有重要的借鉴和指导意义。

  2. Research and Application of Key Technique for Mechanized Royal Jelly Production(III)---Supporting Breeding Technology with Honeybee Colony Breeding for Bionic Non-grafting Larvae Royal Jelly Production%蜂王浆机械化生产关键技术研究与应用(Ⅲ)--仿生免移虫生产蜂王浆的蜂群配套饲养技术

    Institute of Scientific and Technical Information of China (English)

    张飞; 吴小波; 颜伟玉; 王子龙; 曾志将

    2013-01-01

    For the sake of popularizing and applying the“bionic non-grafting larvae technique for royal jelly production”to apiculture production better and faster ,the authors put forward a set of honeybee breeding technology matching the“bionic non-grafting larrae technique for production of royal jelly”based on years ’ pro-duction practice .That is a series of supporting honeybee breeding technology including building comb on the hollow comb foundation ,organizing spawning group and the processes of bionic non-grafting larvae royal jelly production .The successful application of the “bionic non-grafting larvae technique for royal jelly production”will lay the foundation for large-scale royal jelly production .%为使“仿生免移虫蜂王浆技术”更好更快地推广应用于养蜂生产中,经过多年生产实践,提出与“仿生免移虫生产蜂王浆技术”相配套的蜂群饲养技术,即对空心巢础造巢脾、产卵群的组织及仿生免移虫生产蜂王浆步骤等配套蜂群饲养技术。仿生免移虫蜂王浆生产技术的成功应用,将为我国蜂王浆生产规模化奠定基础。

  3. Design of Plant Leaf Bionic Camouflage Materials Based on Spectral Analysis%基于光谱分析的植物叶片仿生伪装材料设计

    Institute of Scientific and Technical Information of China (English)

    杨玉杰; 刘志明; 胡碧茹; 吴文健

    2011-01-01

    The influence of structure parameters and contents of plant leaves on their reflectance spectra was analyzed using the PROSPECT model. The result showed that the bionic camouflage materials should be provided with coarse surface and spongy inner structure, the refractive index of main content must be close to that of plant leaves, the contents of materials should contain chlorophyll and water, and the content of C-H bond must be strictly controlled. Based on the analysis above, a novel camouflage material, which was constituted by coarse transparent waterproof surface, chlorophyll, water and spongy material,was designed. The result of verifiable experiment showed that the reflectance spectra of camouflage material exhibited the same characteristics as those of plant leaves. The similarity coefficient of reflectance spectrum of the camouflage material and camphor leaves was 0. 988 1, and the characteristics of camouflage material did not change after sunlight treatment for three months. The bionic camouflage material, who exhibited a high spectral similarity with plant leaves and a good weather resistance, will be an available method for reconnaissance of hyperspectral imaging hopefully.%利用植物单叶光谱模型PROSPECT分析了植物叶片结构和组分对其反射光谱的影响.结果表明,模拟植物叶片反射光谱的仿生伪装材料应具有粗糙表面和疏松多孔结构,基体材料的折射指数应接近植物叶片且在400~2 500 nm之间基本不变,成分中应含有叶绿素和水并严格控制C-H键的含量.依据上述原则,设计了一种由粗糙透明防水表面、叶绿素、水和多孔材料四层构成的新型仿生伪装材料.验证实验表明,上述四层简单复合后的反射光谱即呈现出与植物叶片一致的反射光谱特征,相似度可达0.988 1,且经过三个月的日照后,其反射光谱特征不变,显示了较好的耐候性.该伪装材料与植物叶片光谱相似度高,耐候性好,有望成

  4. 三种仿生不育剂对栗山天牛成虫的不育效应%Sterilized impacts on adults of oak longhorn beetle, Massicus raddei by three bionical chemosterilants

    Institute of Scientific and Technical Information of China (English)

    姜静; 杨忠岐; 唐艳龙; 唐桦; 高纯; 王小艺; 孟庆伟; 刘松君

    2011-01-01

    为筛选出防治栗山天牛Massicus raddei (Blessig)成虫的不育剂,本研究利用灭幼脲Ⅲ号、除虫脲和杀铃脲3种仿生制剂分别稀释500倍、1000倍、1500倍、2000倍、3000倍和4000倍等6种浓度进行处理,对其成虫进行了不育性试验.结果表明,这3种不育剂不同处理在雌雄虫寿命、产卵量和产卵期、子代卵的孵化历期的差异均不显著,但经不育剂处理过的雌虫后期产卵量要明显小于对照;不同处理间子代卵的孵化率差异显著,特别是3种药剂500倍液处理后的孵化率分别为19.07%、23.74%和26.3%,远低于对照组的90.21%.三种不育剂1500倍以上的稀释浓度对卵的孵化均有明显的抑制作用,孵化抑制率与浓度之间呈正相关关系,其毒力方程均达到了极显著水平,其中来幼脲Ⅲ号比其它两种不育剂效果更好.%For selecting a bionical chemosterilant to control adults of the oak longhom beetle, Massicus raddei (Coleoptera: Cerambycidae) , a study on sterilized impacts of three bionical chemosterilants, i. e. , chlorbenzuron, diflubenzuron and triflumuron, were carried out. They were diluted to six different concentrations, i.e. , 500, 1000, 1500, 2000, 3000 and 4000 times as six treatments. The results showed that there were no significant differences among the three chemosterilants in female and male adult life - span, number of eggs - laying, the lasting time both of egg - laying and egg hatching. However, the egg numbers laid were much lower than the control group. Meanwhile, the egg - hatching rate indicated significantly different among the different treatments, and particularly the treatments of three chemosterilants with 500 - times dilution showed good results; the egg - hatching rates were 19. 07% , 23. 74% and 26. 3% respectively, comparing with the control group 90. 21%. The concentrations of three chemosterilants with 1500 -times dilution all revealed significant inhibitive impacts on egg

  5. The External Representation and Internal Mechanisms of Organizational Health Based on Enterprise Bionics%基于仿生视角的组织健康外在表征与内在机制分析

    Institute of Scientific and Technical Information of China (English)

    王兴琼

    2012-01-01

    企业仿生学的产生赋予企业生命体概念,企业组织也有健康与否之分,并有外在和内在的健康判断标准.根据文献分析争实证研究结果,组织健康的外在表征主要体现在企业绩效、员工健康和社会效益三个层面,可作为组织健康直观的判断标准;环境适应性、自我调节性、学习创新性、持续成长性和社会和谐性是组织健康的内在机制,体现了企业组织不断追求健康的过程.组织健康的外在表征和内在机制是结果与过程的关系,是理解组织健康的两个方面和两种视角.%Based on enterprise bionic, the firm is a living body, and business organization is also differentiated healthily or unhealthily, and has internal and external healthy criteria. Through literature analysis and empirical research, the external representation of organizational health is reflected in three aspects of corporate performance, employee health and social benefits, which can be used as visual criteria for judging organizational health, environmental adaptability, self -regulation, learning and innovation. Sustainable growth and social harmony are the intrinsic mechanisms of organizational health, which reflect the ongoing process of pursuit of health. The relationship between external representation and internal mechanism is the relationship between results and process, including two aspects and two perspectives of understanding organizational health.

  6. Reseach on the energy efficiency optimization device of pump based on combination bionics with TRIZ%采用仿生学与TRIZ相结合的水泵能效优化装置的研究

    Institute of Scientific and Technical Information of China (English)

    李林强; 赖朝安; 王京

    2011-01-01

    从水泵传输系统节能角度出发,运用仿生学与发明问题解决理论(TRIZ)相结合的方法,设计出一种水泵能效优化装置.利用FLUENT软件对该能效优化装置进行计算流体动力学(Computational Fluid Dynamics,CFD)对比实验分析,找出了其内部流场参数速度、压力等的变化规律.实验证明该装置能减少水泵出口处由于不规则湍流运动带来的水质点之间碰撞及能量损失,因而能起到一定的节能作用.%Form the point of transmission systems energy-saving of pump, using the method of combining bionics with TRIZ,designed the energy-efficiency eptimization device of pump. Did the CFD comparative experimental analysis for the nergy-efficiency eptimization device using the software of FLUENT,and found the changing laws of the parameters of its internal flow field,such as, velocity and pressure. Experiments show that this device can reduce the collision between water points and the energy loss due to irregular turbulence on the outlet of the pump. So the device played a certain role in energy conservation.

  7. Algorithm for Texture Image Generation Based on a Bionic Model of Olfactory Neural Networks%基于嗅觉神经网络仿生模型的纹理图像生成算法

    Institute of Scientific and Technical Information of China (English)

    张锦; 李光; WALTER J Freeman

    2008-01-01

    提出了一种基于嗅觉系统生成纹理图像的仿生模型.该模型结构模拟嗅觉神经网络的结构.利用Logsitic函数的混沌特性调整每次迭代过程中的模型参数,使用简单的周期函数作为模型节点的激活函数实现纹理的重复,并引入随机噪声来模拟脑在进行信息处理时的背景噪声.实验结果表明,该模型可以生成丰富而多变的纹理图像,引入的随机噪声也起到了积极的作用,可以明显地丰富纹理图像的变化.此外,模型生成纹理图像的效率也高于传统的BP神经网络模型.%This paper presents a novel bionic model based on olfactory systems to generate texture image. The model simulates one of the oLfactory neural networks. The chaotic characters of Logistic function are used to adjust the parameters of model during iteration. A simple periodic function is used as the activation function of node in the model to generate periodic texture. And a random noise is introduced to simulate the background noise of brain when processing information. The experimental results show that the model can generate plentiful and muhivariant texture images. The introduced random noise plays an important role and enriches the variety of texture images obviously. In addition, the model efficiency to generate texture image outperforms the conventional back propagation neural network model.

  8. 具有仿生条纹结构的内燃机活塞疲劳特性回归分析%Regression analysis of fatigue property of internal combustion engine piston with bionic stripe structure

    Institute of Scientific and Technical Information of China (English)

    吴波; 丛茜; 杨利; 刘洋; 金绍江; 王洪臣; 刘鸿涛; 田为军

    2016-01-01

    were got. Then we could observe the stress, strain and deformation of piston from coupled thermo-mechanical analysis results. Second, most animals have evolved and formed non-smooth surface, which can reduce drag and resist wear. The soil animal earthworm is one of the perfect animals, which has non-smooth surface. It shuttles back and forth in the soil, which was just like piston doing reciprocating motion in air cylinder. We copied stripes and holes from earthworm and enlarged them. The enlarging scale was decided according to piston size. Then the stripes and holes on the piston skirt were processed. The bionic piston could resist attrition and heat dissipation, and increase fatigue life. The coupled thermo-mechanical analysis results of standard piston showed that the stress of perfective aspect of piston was non-uniform. The stress was concentrated on the piston top and the third ring groove, and the maximum deformation was at the bottom of piston skirt. So this design made depth, width and space of stripe variable size. For the stripe, the closer to the top of piston, the larger the depth, width and space between columns. There were 8 stripes on the skirt from top to bottom, and every adjacent 2 stripes had the same size (1 and 2, 3 and 4, 5 and 6, 7 and 8). Third, the three-level and three-factor orthogonal array was used, and 9 testing programs of bionic pistons were made. The first factor was stripe distribution pattern, and it included 3 levels which were stripe distribution, drilling in stripe and a line of stripe with a line of bore. The second factor was stripe depth, and it included 3 levels which were A (0.8, 0.7, 0.6 and 0.5 mm), B (0.9, 0.8, 0.7 and 0.6 mm) and C (1, 0.9, 0.8 and 0.7 mm). The third factor was stripe width, and it included 3 levels which were I (0.8, 0.7, 0.6 and 0.5 mm), II (0.9, 0.8, 0.7 and 0.6 mm) and III (1, 0.9, 0.8 and 0.7 mm). The coupled thermo-mechanical analysis was carried out on 9 bionic pistons. Three typical indices that

  9. 无丝3D打印技术常温构建仿生人工骨支架的研究%Fabrication of a bionic artificial bone scaffold using a room temperature three dimensional printing technique

    Institute of Scientific and Technical Information of China (English)

    林楷丰; 何树; 宋岳; 王铮; 毕龙; 裴国献

    2016-01-01

    目的 应用无丝3D打印技术常温构建基于胶原/羟基磷灰石的仿生活性人工骨支架,探讨该支架对骨髓基质干细胞(BMSCs)的体外生物学作用. 方法 利用无丝3D打印技术在常温条件下基于胶原/羟基磷灰石原料打印仿生活性人工骨,分析支架的物理化学结构,测量其孑隙率和力学强度,评估材料浸提液的细胞毒性.实验分为3组(n=3):空白对照组(无材料),打印支架组,非打印支架组.扫描电镜和免疫荧光观察BMSCs在材料的黏附情况,3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐(MTT)法和扫描电镜评价BMSCs在材料上的增殖情况.通过检测碱性磷酸酶活性和成骨相关基因的表达评价支架对细胞的促成骨作用. 结果 本实验制备的三维支架孔径可控、大小均一,孔道相互联通,支撑材料横剖面为不规则的蜂窝样结构.打印支架的孔隙率(71.14%±2.24%)显著高于非打印支架(59.04%±2.98%),差异有统计学意义(P<0.05).打印过程基本保留了材料本身的物理化学结构,不会产生细胞毒性.MTT结果显示:支架种植细胞后7、14 d时打印支架上的吸光度值显著高于非打印支架,差异均有统计学意义(P<0.05).电镜结果显示细胞可良好黏附于打印支架,并沿着支架的联通通道增殖、迁移.成骨实验检测显示支架有显著性的促成骨作用. 结论 常温无丝3D打印胶原/羟基磷灰石支架可在体外提供良好的环境供BMSCs黏附,并促进其增殖及成骨分化.%Objective To prepare a bionic artificial bone scaffold using a room temperature three dimensional (3D) printing technique and evaluate its biocompatibility and bioactivity in vitro.Methods A room temperature 3D printing technique was applied to fabricate 3D bionic artificial bone scaffolds using collagen/hydroxyapatite.The physico-chemical structure,porosity and mechanical strength of the scaffolds were assessed.The extract liquid of

  10. Nondestructive testing and pull shear performance experiment on bionic heterogeneous compound materials interface%仿生结构异质复合材料界面无损检测及拉剪性能试验

    Institute of Scientific and Technical Information of China (English)

    田丽梅; 李子源; 可庆朋; 金娥; 董世运

    2015-01-01

    Bionic form heterogeneous composite material (BCHCM), which is inspired by the dolphin skin and formed by the compounding of polyurethane (PU) and cast iron, can be used as drag reduction material. However, PU and cast iron belong to completely different materials. When they are combined together, defects are easily formed on the interface, and these defects will affect their mechanical properties, and so will limit their application in engineering. The purpose of this study was to investigate interfacial nondestructive testing method and pull shear performance of these materials, and provide practical engineering application technology for them. The BCHCM in this study was composed of the surface material (PU) and basal material (cast iron). The elasticity surface material was mixed of polyurethane pre polymers (PUP) (C10H8N2O2·C6H14O3) and curing agent (C13H12N2CL2), and the contents of them were measured by quality ratio. In order to understand the effect of above two components on the shear stress, three kinds of quality ratios were considered, which were 100:10, 100:12 and 100:14.6 respectively. The basal material of cast iron and the bionic form were composite together using the casting and compressive moulding method. Nondestructive testing method for this composite material was investigated using EUT-101B ultrasonic flaw detector, and the dual probes were put on two sides of the BCHCM. One probe transmitted signal and the other probe received signal, and defect was judged through the changes of transmission acoustic intensity. The results showed that the transmission acoustic intensity of good interface was larger than that of defective interface. This was due to the thin layer of air existed on the defective interface that hindered the transmission of sound wave, which made the transmission acoustic intensity relatively small. So during the process of detection, the region where transmission acoustic intensity was significantly lower than other places can

  11. Bionics Sensing Intelligent Sensor Detection Technology and Its Application in Yunnan Characteristics Agricultural Products Quality Detection%仿生传感智能感官检测技术及其在云南特色农产品品质检测中的应用

    Institute of Scientific and Technical Information of China (English)

    许文方; 张海东; 李贵荣; 杨丽祥

    2013-01-01

    The concepts of machine vision technology,electric smell technology,electric taste technology three bionics sensing intelligent sensor detection technology were introduced,their function,features and application in Yunnan cured tobacco,Pu' er tea,herbal medicines and cut flowers were elaborated.The existing problems in application of bionics sensing intelligent sensor detection technology in quality detection of Yunnan characteristics agricultural products were analyzed.%介绍了机器视觉技术、电子嗅觉技术和电子味觉技术3种仿生传感智能感官检测技术的概念,阐述了其功用、特点及其在云南烤烟、普洱茶、中药材和鲜切花品质检测中的应用,同时分析了仿生传感智能感官检测技术用于云南特色农产品品质检测还存在的问题.

  12. Bionic energy system based on an air breathing chemoelectric converter (fuel cell) with biomass-derived glucose as hydrogen transfer medium and assessment of renewable glucose production; Bionisches Energiesystem auf der Basis eines luftatmenden chemoelektrischen Wandlers (Brennstoffzelle) mit Glucose aus Biomasse als Wasserstoffuebertraeger sowie Abschaetzung des Potentials an nachwachsender Glucose

    Energy Technology Data Exchange (ETDEWEB)

    Radebold, R.; Radebold, W.

    2001-07-01

    The fundamental principles and thermodynamics of the biological energy system as well as the role of glucose and H{sub 2}O{sub 2} in the photosynthesis and breathing processes are briefly explained. Transposition of the principles in a bionic energy system is discussed, and resulting engineering aspects and advantages of a bionic energy system based on renewable biomass-derived glucose are shown and compared with conventional energy systems based on fossil fuels. The potential of inland production of suitable biomass is assessed. (orig./CB) [German] Funktion und Thermodynamik des biologischen Energiesystems sowie die Rollen von Glucose und H{sub 2}O{sub 2} in Photosynthese und Atmung werden kurz erlaeutert, ueber die Umsetzung dieser Prinzipien zu einem bionischen Energiesystem wird berichtet. Technische Konsequenzen und Vorteile eines bionischen Energiesystems mit Glucose aus nachwachsender Biomasse werden im Vergleich zum heutigen technischen Energiesystems mit fossilen Brennstoffen eroertert. Eine Schaetzung des heimischen Potentials an nachwachsender, fuer diese Zwecke geeigneter Biomasse wird vorgelegt: rund die Haelfte der heutigen Nutzenergie koennte ueber ein bionisches Energiesystem bereitgestellt werden. (orig.)

  13. Design of intelligent lower limb knee-ankle flexible bionic control device%人体下肢膝-踝关节智能仿生控制装置设计

    Institute of Scientific and Technical Information of China (English)

    董彩; 薛召军

    2011-01-01

    为使人体下肢假肢尽可能接近正常人的步态行走模式,设计了以数字信号处理器(DSP)为控制核心的下肢假肢膝-踝关节柔性仿生控制装置,以便改善下肢假肢的功能性、灵活性与可用性;设计采用生物电传感器采集患者下肢残段的生物电信号,同时检测速度及加速度传感器的信息,经多通道信号运算放大滤波后,进行模数转换,将数字信息输入DSP微处理器进行步态分析与决策,DSP输出的PWM信号对电机进行控制,进而控制假肢的膝-踝关节的全时相角度、力学及运动学参数。%In order to make artificial lower limbs of human body as close as possible to the normal gait pattern, the lower extremity prosthetic knee and ankle joint flexible bionic control device is designed with the digital signal processor (DSP) as the control core, in order to improve lower limb prosthesis functionality, flexibility and usability. Biological electrode obtains biological signal under section of the patients, and detects the information of acceleration and speed sensor, after the multi-channel signals operation amplifier filtering, analog-to-digital conversion , digital infmznation input DSP microprocessor on gait analysis. PWM signal of DSP output controlls the motor and then outputs control decision-making information, controls the prosthetic knee, ankle phase Angle and force full-time and kinematics parameter, which is of important application prospect and academic value.

  14. The Use of Remote Bionic Operation Tool Removing Foreign Bodies in Distribution Line%带电清除配电线路异物的遥控仿生操作工具

    Institute of Scientific and Technical Information of China (English)

    章志钧; 孙伟; 傅正财

    2012-01-01

    As the traditional insulated tools does not meet the live working requirement of clearing foreign body in distribution lines, a remote bionic operation tool was developed, being consisted of a mechanical end of the Insulation rod, a remote control transmitter and a receiver. Just hold the tools and the foreign body can be removed easily. It can easily do the operation like grab, pull or cut to the foreign body. The operation was accurate, reducing the shake of the tools and human body, which ensured the effective insulation distance of the operating tools and kept the effective air gap between the human body and the charged body. It reduced the leakage current flowing through the human body as well as the time in live working, and improved the safety and efficiency of foreign body removal in live working of medium voltage distribution lines.%针对清除中压配电线路异物使用传统绝缘工具不能满足带电作业的状况,研发了一种遥控仿生操作工具。该工具由机械端部、绝缘杆、遥控发射器和接收机组成。在带电清除异物时,只需将遥控仿生操作工具的端部放在合适位置,即可方便地实现抓取、拽拉或剪断异物的操作,整个操作过程施力准确,减少了端部机构的抖动,确保了人体与带电体间的有效空气间隙,保证了操作工具的有效绝缘距离,降低了流经人体的泄漏电流,减少了带电作业时间,提高了中压配电线路带电清除异物作业的安全性及工作效率。

  15. Research on Molding Bionic Artificial Bone Scaffold Based on Shape Function%基于形函数的人工骨支架仿生建模技术研究

    Institute of Scientific and Technical Information of China (English)

    杨立军; 齐艳梅; 王丽丽

    2013-01-01

    人工骨支架在骨仿生研究中起重要作用,它不仅能代替缺损骨支撑人体,而且能够引导组织再生、增殖和功能发挥.以有限元形函数映射理论与布尔运算为基础,利用UG二次开发工具UG/Open GRIP,提出了一种仿形精度较高,通用性较强的支架建模方法:首先利用映射法将骨实体模型进行六面体网格划分,然后通过每个六面体的八个节点把规则的单元微结构负型映射得到相应的子单元负型,每个完整的子单元负型进行布尔并运算得到微孔结构负型,即内部微结构模型,最后通过骨实体外形与微结构负型进行布尔差运算获得仿形支架.以人体承力骨为研究对象,研究表明:通过有限元单元的剖分和约束方法,能高效随机地获得更自然的支架模型.%The artificial bone scaffold plays an important part in bionic artificial bone, and it not only provides support for human body, but also guides the regeneration and proliferation of tissues and displays the function. Based on the mapping theory and Boolean operation, a modeling method was put forward with higher profiling accuracy and stronger versatility through the secondary development tools of UG/Open GRIP: firstly, based on the mapping method, the solid model was meshed with the hexahedral mesh; secondly. On the basis of the acquired information of nodes, the unit microstructure was mapped into the irregular and negative microstructure, and then the internal microstructure model was established based on the boolean operation union; at last the scaffold model was gained through boolean subtraction of the internal microstructure model and the solid model. This thesis regards load bearing bone of human body as an object, and the results show that a more natural scaffold model can be achieved efficiently and randomly by using the method.

  16. Self-adaptive Bionic Legs and the Way of Walking Self-switchable Vehicle%具有自适应性仿生腿及行走方式可切换式汽车

    Institute of Scientific and Technical Information of China (English)

    王棋; 刘群

    2016-01-01

    高性能移动机器人主要用于灾难搜救、星球探测、军事侦察、矿山开采等非结构化环境中,其移动系统可分为轮式、腿式、履带式以及轮腿结合式4类。其中,轮腿式机器人不仅具备腿式机器人的高越障性能和对复杂地形的高适应性能,还兼备轮式机器人在平整地面上滚动的高速高效性能。具有自适应性仿生腿及行走方式可切换式汽车综合了轮式系统和腿式系统的优势,具备多种运动姿态,包括滚动、攀爬楼梯等,具有运行平稳、带负载能力强以及越障性能好的优点。可作为移动机器人平台搭载相关设备完成星球探测、军事侦察、扫雷排险等多种工作。%Autonomous robots have many potential applications like farming, exploration, investigation and waste lean-up, based on their well-designed locomotion system. Wheel-legged rover is a typical hybrid mobility system, inherits both advantages of wheeled and walking systems, i.e. the high-speed and efficient rolling performance for the first one; and the obstacle clearance performance as well as high adaptability to rough terrains for the second. The self-adaptive bionic legs and the way of walking self-switchable vehicle have many potential applications, including geological investigation, space exploration, military reconnaissance, defense, demining, etc.

  17. Bionic Structure Design for Double Tauren EDM Machine Smooth Pillow Reinforcing Plate%双牛头电火花机床平滑枕筋板结构仿生设计

    Institute of Scientific and Technical Information of China (English)

    牛金磊; 李锻能; 丰树礼

    2013-01-01

    By using bionic principles and methods of force structure,the internal rib structure of the key moving parts-horizontal ram of some EDM machine were designed and analyzed to ensure its structural rigidity,at the same time to make the maximum light-weight. Through the analysis of the distribution pattern of leaf veins structure,combining with the force structure of the smooth pillow member,reasonable layout form of the ribs was designed. By applying SolidWorks,the simulation structure of the entity model was es-tablished,and ANSYS finite element analysis (FEA)software was used for static analysis validation and modal analysis. The research results have an important role to ensure specific stiffness of the machine’s related moving parts,to improve accuracy and the system dy-namics performance.%利用受力结构仿生的原理和方法,对某型号电火花加工机床的关键运动部件---水平滑枕的内部筋板结构进行设计分析,在保证其结构刚度的同时,最大限度地进行轻量化。通过对叶片中叶脉结构分布规律的分析、总结,结合平滑枕部件的受力结构,设计出合理的筋板布局形式。应用SolidWorks建立结构仿真实体模型,并运用ANSYS有限元分析软件进行静力学分析和模态分析验证。研究结果对于保证机床相关运动部件的比刚度、提高机床工作精度以及系统动力学性能具有重要作用。

  18. 打顶及仿生信号分子对烟草氧化胁迫的影响%Reaction of Tobacco to Oxidation Stress Induced by Topping and Bionic Signal Molecules

    Institute of Scientific and Technical Information of China (English)

    张新华; 姚忠达; 陈常伟; 查向东; 程新胜

    2011-01-01

    To investigate whether the mechanical injury on tobacco by topping induces oxidation stress, the contents of superoxide anion (O2) .hydrogen peroxide (H2O2) and malondialdehyde (MDA) and the activity of superoxide dismutase (SOD) in leaf tissue were determined and their changes were analyzed and compared with untopped control in a period of time after topping. Bionic signal molecules (BSM) was immediately applied to the plants' top after topping, and relative biochemical indexes were measured. The results showed that topping would stimulate the oxidation stress. Exogenous BSM treatment would inhibit oxidation stress induced by topping, reduce the accumulation of O2~, H2O2, MDA in tobacco leaves, and improve the activity of SOD. BSM restricted the synthesis of jasmonic acid by inhibiting oxidation stress, and further reduced the accumulation of alkaloids in topped tobacco plant.%打顶对烟草植株是一种创伤,为明确这种机械创伤是否对烟草植株形成氧化胁迫,测定了非打顶株及打顶株在打顶后一定时间内叶片组织中的超氧阴离子(O2-·)、过氧化氢(H2O2)、丙二醛(MDA)和超 氧化物歧化酶( SOD)的含量与活性,并分析了这些生化指标的变化;同时,在打顶后立即在烟株顶部涂抹仿生型信号分子BSM,测定了相关生化指标.结果表明:打顶能够激发烟草产生氧化胁迫;而外源BSM处理可以抑制打顶后烟草植株的氧化胁迫,减少了烟草叶片中O2-,H2O2,MDA的积累,SOD的活性增加,BSM是通过抑制氧化胁迫、减少了茉莉酸的合成,进而降低了打顶后烟草植株中生物碱的积累.

  19. Design and test for a double T-shape MEMS bionic vector hydrophone%双T型MEMS仿生矢量水听器的设计与测试

    Institute of Scientific and Technical Information of China (English)

    刘林仙; 张国军; 许姣; 张文栋

    2013-01-01

    In view of the demand of current sonar systems, a novel double T-shape vector hydrophone was proposed based on piezoresistive effect, bionic principle and MEMS technology. Based on mechanical properties analysis of the T-shape beam, design, simulation, fabrication and test of double T-shaped vector hydrophones with two different sizes were described. The microstructure of the hydrophone was statically simulated with ANSYS, and the first-order resonance frequencies of the two microstructures were 1993. 3Hz and 10. 17 kHz, respectively. The microstructure of the hydrophone was manufactured with MEMS technology and was encapsulated. The hydrophone was measured using a shaking table and an underwater standing wave field. The test results showed that their receiving sensitivity is up to -180dB and -192dB at 1 kHz (OdB = 1V/μPa) , their dynamic range is 90. 48 dB and the two vector hydrophones possess a good "8" directional pattern.%根据当前声纳系统的需求,以MEMS技术为依托,结合仿生原理、压阻原理,提出了一种双T型矢量水听器.在分析T型梁结构力学特性的基础上,详细介绍了两种不同尺寸微结构的设计、加工和测试.采用ANSYS软件仿真,得出两种微结构的谐振频率分别为1 993.3 Hz和10.17 kHz;利用MEMS加工工艺加工出水听器微结构并对水听器进行了封装;采用振动台标定和水下驻波场测试相结合的方法完成了水听器的测试.测试结果表明两种结构的双“T”型矢量水听器灵敏度达到-180 dB和-192 dB(1 kHz,0 dB参考值1 V/μPa),具有良好的“8”指向性,矢量特性明显,动态范围为90.48 dB(315 Hz).

  20. A Bionic Walking Control for Biped Robot Using Sinusoidal Input and Sensory Feedback%正弦驱动与传感反馈结合的双足机器人仿生行走控制

    Institute of Scientific and Technical Information of China (English)

    王健美; 付成龙; 陈恳; 黄元林

    2009-01-01

    提出了一种正弦驱动与传感反馈结合的双足机器人仿生行走控制方法.所有关节由正弦振荡器驱动,较之相互耦合的神经元振荡器更加简单;控制参数具有明晰的物理意义,便于对运动模式进行调节.传感反馈表征了机器人的运动状态,对于保证机器人的稳定行走起着至关重要的作用.将机器人碰地、碰膝等关键运动状态作为相位反馈,对控制力矩进行相位重置,协调各关节动作,进而实现控制器、机器人、环境的耦合.同时,从节省能量和仿生的角度,考虑了关节运动的被动特性,确定了各关节力矩的作用区间.仿真结果表明,该控制方法能实现机器人稳定行走,并具有良好的能效性和自稳定性.%A bionic walking control strategy for biped robot using sinusoidal input and sensory feedback is proposed. All joints are actuated by sinusoidal oscillator, which is simpler than coupled neural oscillators. Control parameters have clear physical meaning, and it is convenient to adjust walking pattern. Locomotion states of robot are characterized by sensory feedbacks, which play an important role in ensuring stable walking. Some key locomotion states, such as ground impact and knee impact, are used as phase feedback to reset joint torques and coordinate movement of different joints. The coupling among controller, robot, and environment is then realized. The actuating areas of torques are determined considering passive characteristic of joints from the perspectives of saving energy and imitating human beings. The simulation results show that stable walking with favorable energy efficiency and self-stability is obtained using this control strategy.

  1. 基于摆频控制的鱼群自主游动数值模拟研究%Numerical simulating of self-propelled bionic fish swimming based on tail-beat frequency control method

    Institute of Scientific and Technical Information of China (English)

    王亮

    2013-01-01

    A novel numerical method used to simulate the self-propelled fish swimming is proposed.The self-propelled state is obtained by controlling the tail-beat frequency,so the novel method is called frequency control method (FCM).The governing equation of the FCM is derived from the approximate relation between the self-propelled swimming speed and the tail-beat frequency and the Newton's second law.The new method is validated by comparing the results obtained by the FCM with those achieved by the conventional speed control method (SCM,the swimming speed of SCM is determined by the Newton's second law).Both results are consistent with each other.In addition,the convergence rate of the FCM is also discussed and the optimal parameter is suggested.Finally,a fish school consisting of three self-propelled bionic fishes as a basic element,at Re=5000,have been numerically investigated.It is revealed that the energy consumption decreases 19% and the Froude efficiency increases 36% in average,respectively.%本文提出了一种通过控制仿生鱼摆频来达到自主推进状态的数值模拟新方法(简称摆频控制法),并利用自主游动速度与摆频之间的近似关系以及牛顿第二定律推导出了摆频的控制方程.通过与传统的速度控制法(仿生鱼的自主游动速度由牛顿第二定律确定)的比较,验证了该方法的可靠性,并对影响该方法收敛速度的敏感因子进行了讨论,给出了最优参数,并通过模拟三条仿生鱼组成的鱼群基本单位在Re=5000时的自主游动,证明了摆频控制方法在鱼群自主游动数值模拟中的有效性.结果表明,鱼群整体平均节能约19%,推进效率平均提高了约36%.

  2. 液压驱动仿生多足机器人单腿设计与试验%Design and experiment of single leg of hydraulically actuated bionic multi-legged robot

    Institute of Scientific and Technical Information of China (English)

    陈志伟; 金波; 朱世强; 黄翰林; 陈刚

    2016-01-01

    In order to study the influence of the end-effector’s high speed contact with ground on the robot system when the hydraulically actuated multi-legged robot walks in a dynamic gait and realize its control as well, a single leg prototype of the bio-inspired hydraulically actuated multi-legged robot is developed. The robotic leg's structure is designed on the basis of research and analysis of the skeletons of the large dogs' hind limbs. The hip and knee cylinder layout are designed from the principle of rotating guide bar mechanism and swing guide bar mechanism, respectively. The torque of robotic leg's joint on stance phase is calculated on the basis of former biologists’ research results and the planned joint trajectory of dynamic trotting gait on stance phase. The former biologists have already researched the dynamic gait of large dogs and separately measured the ground reaction forces on individual limb of trotting dogs using a series of four force platforms; the dynamic trotting gait trajectory with a speed of 2.5 m/s is planned as composite cycloid foot trajectory on flight phase with the same body height on stance. And the composite cycloid’s foot trajectory is planned with the specifications: the stride length is 1 m, the stride height is 0.05 m, the period is 4 s, and the duty cycle is 50%. Based on the above bionic design, the mechanical parameters of the robotic single leg are determined: the length of thigh and shank is 0.35 m, the hip joint angle range is [-50°, 70°], the knee joint angle range is [-140°, -20°], the diameter of the cylinder piston is 0.02 m, the diameter of piston rod is 0.01 m, and the stroke length of the piston rod is 0.1 m. The virtual prototype of robotic single leg is designed via the three-dimensional modeling software Solidworks according to the design parameters. Furthermore, the feasibility of the parameters of the designed mechanical structure and hydraulic actuator is verified based on the dynamic vertical hopping

  3. Spatial Relationships Among Tourism Destinations Based on Bionics Theory: A Case Study of Xidi and Hongcun villages in Anhui Province%旅游目的地仿生学空间关系研究——以安徽省古村落西递、宏村为例

    Institute of Scientific and Technical Information of China (English)

    徐红罡; 薛丹

    2011-01-01

    旅游目的地之间在多重因素的影响之下,空间关系总会呈现出有别于竞争与合作关系的其他形式。研究了旅游目的地空间关系的生态学解释和旅游生态位概念,在此基础上建立仿生学空间关系数学模型,构建旅游目的地仿生学空间关系研究体系,并将新体系实际应用于案例地西递、宏村,最后得出结论:宏村的整体竞争力水平高于西递,且两村于2006—2007年间达到稳定的竞争状态并一直延续到现在。案例分析证明了旅游目的地仿生学空间关系研究对于旅游规划与管理的理论和实践意义。%In recent years, the researches on the spatial relationship of tourism destinations were halted at three directions : competition, cooperation, and cooperation-competition. However, under the influence of economic, social, and cultural factors, the spatial relationships of tourism destinations always show other different forms. The former relationship classification is so simple that it cannot deal with the complex situations. With a literature review on the domestic and abroad studies, the author found that lots of scholars began to try to explain the relationship in ecological ways. The spatial relationships between two or more destinations are described as competition, predation, symbiosis, and parasitism. " Niche", as ecological terminology, has been introduced into tourism study. The purpose of this study is to apply the bionics theory to the tourism destination and to explore new methodology for the spatial relationships of destinations qualitatively and quantitatively. Thus, this paper is composed by three parts : 1 ) the establishment of the spatial relationship models based on ecological interpretation; 2) the construction of a bionics study approach of spatial relationship among tourism destinations ; and 3 ) the application of the new approach to Xidi and Hongcun villages as a case study. After fieldwork

  4. Scour Prevention of East China Sea Oil & Gas Export Pipeline on The Base of Bionic Scour-Prevention Technique%基于仿生技术防治平湖油气田外输海底管线冲刷的探讨

    Institute of Scientific and Technical Information of China (English)

    梁富浩; 张印桐; 庄亚锋; 苗春生

    2011-01-01

    以曾两次因冲刷悬空而发生事故的平湖油气田岱山近岸段KP2.6为例,通过比较挖沟、传统抛石、砂袋支撑、水泥压块以及仿生草技术等悬空处理与冲刷控制措施,提出了“砂袋悬空回填与仿生草永久性冲刷防治”方案,系统地探讨将仿生草技术用于东海海底管线的防护,对东海乃至全国海底管线悬空处理与冲刷防治都有借鉴价值.%Taking the KP2. 6 near Dai-shan shore approach of Ping-hu Oil and Gas field as an example, which damaged twice by the scour, comparing with the trenching, traditional stone dumping, sand bags support and concrete mattresses, and bionic scour- prevention technique, sand bags support for free-span back fill and frond mats are recommended for permanent scour prevention, and this is the first time to systemicly discuss the bionic scour- prevention technique for the subsea pipelines in the east china sea, so there will be important applied value and practical significance for scour protection and free-spans rectification of subsea pipeline in the east china sea.

  5. 基于APDL和分层优化技术的高速加工中心工作台的仿生优化%Bionic optimization of high-speed machining center workbench based on APDL and hierarchical optimization techniques

    Institute of Scientific and Technical Information of China (English)

    项菲菲; 李尚平; 李健; 唐满宾; 项忠珂

    2012-01-01

    Aimed at high speed mat-Inning center high mac Inning accuracy and lightweight design require ments, two different stiffened plate structure workbenches are designed, one adopts traditional design method,the other is designed based on the bionics ;Then finite element analysis based on CAD/CAE integration technology is done;Based on APDL and hierarchical optimization techniques,dimensions of stiffened plate of workbench with obvious advantages in bionic design are optimaized to get the optimal size; Through static analyzing and modal analyzing the superiority of the optimization schemes is verified,which provide guidance for practical product ion.Through simulating,arranging,analyzing and refining the excellent properties oj biology, a new design of thinking method similar with biological features is designed.%针对高速加工中心高加工精度和轻量化的设计要求,设计了两种有不同筋板结构的工作台,一种采用传统设计方法,另一种基于仿生学的设计;基于CAD/CAE一体化技术对其进行有限元分析;基于APDL和分层优化技术对优势明显的仿生设计工作台的筋板的尺寸进行了优化,得到了筋板的最优尺寸;通过静态分析和模态分析验证了优化方案的优越性,为实际生产提供指导,通过对生物优异特性的模拟、整理、分析、提炼,从而构思设计出具有类似于生物特征的一种新的设计思维的方法.

  6. Technique Optimization of Semi-Bionic Extraction for Erhuang Decoction%二黄汤方药半仿生提取法工艺条件的优选

    Institute of Scientific and Technical Information of China (English)

    王京龙; 孙秀梅; 张兆旺; 黄延亮; 姜仁禹; 周莹

    2011-01-01

    Objective To optimize the techniques of semi - bionic extraction( SBE )for erhuang decoction with uniform design. Methods The uniform design U9( 91 × 33 )table was used. In the same conditions, such as formula specification , decoction extraction temperature , water dose of decoction extraction, filtration and concentration, taking water pH values of three decoctions and the total decoction time as the investigation factors, and the extract of molecular weight ≤ 1000 Da , baicalin , berberine hydrochloride , glycyrrhetinic acid and total alkaloids as the indicators , the values of all the indicators were standardized and Y value of comprehensive evaluation index was ohtained after weighted summation. With JYSYSJ software management,the technique conditions of this formula SBE were optimized. Results With comprehensive analysis, the optimized techniques of SBE for erhuang decoction : pH values of three decoction A = 3.6032 ,B = 6.5039, C =8.7656 successively; the total extraction time of three decoctions: D = 4.9473. Conclusion In association with the actual production,it is determined that pH values of three decoction are 3.5 ,6.5 and 8.8 ; and the extrac:tion time is 2.0 h,l.5 h and 1.5 h successively. Y' value of the comprehensive evaluation for the confirmatory test extract is near to the predicted value. All of those explain that SBE technique parameters optimized in the uniform design for this formula are applicable in production.%目的 用均匀设计优选二黄汤方药半仿生提取的工艺条件.方法 采用均匀设计U9(91×33)表,在方药规格、煎提温度、煎提用水量、滤过、浓缩等条件相同的情况下,以3煎用水的pH值及总煎煮时间为考察因素,分子量≤1 000 Da提取物、黄芩苷、盐酸小檗碱、甘草次酸、总生物碱为指标,将各指标测得值进行标准化处理,并经加权求和后得到综合评判指标Y值,用JYSYSJ软件处理,优化该方药半仿生提取的工艺条件.结果 经综

  7. Bionic robot arm with compliant actuators

    Science.gov (United States)

    Moehl, Bernhard

    2000-10-01

    Traditional robotics uses non-compliant materials for all components involved in the production of movement. Elasticity is avoided as far as possible, because it leads to hazardous oscillations and makes control of precise movements very difficult. Due to this deliberate stiffness, robots are typically heavy and clumsy structures in comparison to their living counterparts (i.e. man and animals). Yet, moving systems in nature cope not only with the difficulties introduced by compliant materials, they also take advantage of the elasticity in muscles and tendons to produce smooth and even rapid movements. It is understood, that elasticity in a multi-jointed moving system requires sophisticated control mechanisms- as provided by a nervous system or a suitably programmed computer. In this contribution I shall describe a two-jointed robot with purpose-built elasticity in its actuators. This is accomplished by spiral springs places in series with a conventional electric motor and a tendon to the arm. It is shown that, with sufficiently soft elasticity, oscillations can be avoided by active oscillation damping. (Such active oscillation damping presumably also governs movement control in man and animals.) Furthermore, once the major problem has been overcome, elasticity is found to offer a wide spectrum of valuable advantages, as far as the most serious problems in traditional robotics are concerned. They are summarized by terms such as less dangerous, position tolerant, lightweight construction, controlled forces, and ballistic movements. These will be explained in detail and presented for discussion.

  8. Bionics: Biological insight into mechanical design

    OpenAIRE

    Dickinson, Michael H

    1999-01-01

    When pressed with an engineering problem, humans often draw guidance and inspiration from the natural world (1). Through the process of evolution, organisms have experimented with form and function for at least 3 billion years before the first human manipulations of stone, bone, and antler. Although we cannot know for sure the extent to which biological models inspired our early ancestors, more recent examples of biomimetic designs are well documented. For example, birds and bats played a cen...

  9. D-BIonic Screening of Scalar Fields

    CERN Document Server

    Burrage, Clare

    2014-01-01

    We study a new screening mechanism which is present in Dirac-Born-Infeld (DBI)-like theories. A scalar field with a DBI-like Lagrangian is minimally coupled to matter. In the vicinity of sufficiently dense sources, non-linearities in the scalar dominate and result in an approximately constant acceleration on a test particle, thereby suppressing the scalar force relative to gravity. Unlike generic P(X) theories, screening happens within the regime of validity of the effective field theory, thanks to the DBI symmetry. This symmetry also allows the removal of a constant field gradient, like in galileons. Not surprisingly, perturbations around the spherically-symmetry background propagate superluminally, but we argue for a chronology protection analogous to galileons. We derive constraints on the theory parameters from tests of gravity and discuss various extensions.

  10. Non-Abelian BIonic brane intersections

    International Nuclear Information System (INIS)

    We study 'fuzzy funnel' solutions to the non-Abelian equations of motion of the D string. Our funnel describes n6/360 coincident D-strings ending on n3/6 D7-branes, in terms of a fuzzy six-sphere which expands along the string. We also provide a dual description of this configuration in terms of the world volume theory of the D7-branes. Our work makes use of an interesting nonlinear higher dimensional generalization of the instanton equations

  11. Bionics: A Step toward Artificial Intelligence Systems

    Science.gov (United States)

    Dutton, Robert E.

    1970-01-01

    Recent developments and future prospects in the borrowing of biological principles to build problem solving relationships between human intelligence and the information storage and manipulation capacities of computers. Twenty-one references. (LY)

  12. BOWOOSS: bionic optimized wood shells with sustainability

    Science.gov (United States)

    Pohl, Göran

    2011-04-01

    In architecture, shell construction is used for the most efficient, large spatial structures. Until now the use of wood rather played a marginal role, implementing those examples of architecture, although this material offers manifold advantages, especially against the background of accelerating shortage of resources and increasing requirements concerning the energy balance. Regarding the implementation of shells, nature offers a wide range of suggestions. The focus of the examinations is on the shells of marine plankton, especially of diatoms, whose richness in species promises the discovery of entirely new construction principles. The project is targeting at transferring advantageous features of these organisms on industrial produced, modular wood shell structures. Currently a transfer of these structures in CAD - models is taking place, helping to perform stress analysis by computational methods. Micro as well as macro structures are the subject of diverse consideration, allowing to draw the necessary conclusions for an architectural design. The insights of these tests are the basis for the development of physical models on different scales, which are used to verify the different approaches. Another important aim which is promoted in the project is to enhance the competitiveness of timber construction. Downsizing of the prefabricated structural elements leads to considerable lower transportation costs as abnormal loads can be avoided as far as possible and means of transportation can be loaded with higher efficiency so that an important contribution to the sustainability in the field of architecture can also be made.

  13. Bionic vision: system architectures: a review.

    Science.gov (United States)

    Guenther, Thomas; Lovell, Nigel H; Suaning, Gregg J

    2012-01-01

    The concept of an electronic visual prosthesis has been investigated since the early 20th century. While the first generation of long-term implantable devices were defined by the turn of the millennium, the greatest progress has been achieved in the past decade. This review describes the current state of the art of visual prosthesis investigated by more than two dozen active groups in this field of research. The focus is on technological solutions in regard to long-term safety of materials, electrode-tissue interfaces and encapsulation technologies. Furthermore, we critically assess the maximum number of stimulating electrodes each technological approach is likely to provide.

  14. Non-Abelian BIonic Brane Intersections

    CERN Document Server

    Cook, P; Murugan, J; Cook, Paul; Koch, Robert de Mello; Murugan, Jeff

    2003-01-01

    We study "fuzzy funnel" solutions to the non-Abelian equations of motion of the D-string. Our funnel describes n^6/360 coincident D-strings ending on n^3/6 D7-branes, in terms of a fuzzy six-sphere which expands along the string. We also provide a dual description of this configuration in terms of the world volume theory of the D7-branes.

  15. Bionic Design Methods - A practical approach

    DEFF Research Database (Denmark)

    Kepler, Jørgen Asbøll; Stokholm, Marianne Denise J.

    2004-01-01

    Nature has served as inspiration for product design throughout history. Applications range from poetic translations of form to utilization of primary functional principles. This paper describes a generally applicable design methodology for transforming natural functional principles to feasible pr...

  16. Comparison of the clinical effect between bionic air-bag midwifery by single expansion method and natural delivery%“单扩法”气囊仿生助产与自然分娩临床效果比较

    Institute of Scientific and Technical Information of China (English)

    姚娟娟; 董林红; 邓月桂; 蒙朝霞; 覃莹莹

    2016-01-01

    Objective To explore the clinical effect of a bionic air-bag midwifery skill by single expansion method in delivery.Methods Eighty puerperae in accordance with the inclusion criteria were randomly divided into the observation group(n=40) and the control group(n=40).The bionic air-bag midwifery skill by single expansion method was used in the observation group when the cervix was dilated≥5 cm.The duration of labor,delivery modes, perineum conditions, amount of postpartum hemorrhage and the rate of neonatal asphyxia were compared between the two groups.Results The time of the first, second stage and the total labor duration in the observation group were sig-nificantly shorter than those in the control group(P0.05).Con-clusion The bionic air-bag midwifery by single expansion method can shorten the laboring time and reduce the relat-ed complications during parturition.%目的:探讨在自然分娩过程中使用“单扩法”气囊仿生助产术的临床疗效。方法将符合纳入标准的80例产妇随机分为观察组和对照组各40例,观察组在宫口开大≥5 cm时采用“单扩法”气囊仿生助产术助产,对照组采取自然分娩。记录比较两组产妇的产程时间、分娩方式、会阴情况、产后出血情况及新生儿窒息率。结果观察组第一产程、第二产程及总产程时间均短于对照组,差异均有统计学意义( P<0.05)。观察组产妇产后2 h内平均出血量少于对照组,差异有统计学意义( P<0.05)。两组分娩方式、会阴情况及新生儿窒息率比较差异均无统计学意义(P>0.05)。结论“单扩法”气囊仿生助产术可以明显缩短产程时间,降低并发症发生率,对母婴无不良影响,值得临床应用推广。

  17. 用均匀设计优选栀子柏皮汤半仿生法提取的工艺条件%Optimizing the technological parameters for extracting Zhizi Baipi decoction with uniform design of semi-bionic method

    Institute of Scientific and Technical Information of China (English)

    荆汉卫; 孙秀梅; 张兆旺; 黄延亮

    2011-01-01

    [目的]优选栀子柏皮汤半仿生提取工艺条件.[方法]采用均匀设计法,在方药规格、煎提温度、煎提用水量、滤过、浓缩等条件相同的情况下,以分子量≤l 000 u提取物、栀子苷、小檗碱、甘草次酸、总生物碱为指标,综合评判,优选该方药半仿生提取的工艺条件.[结果]3煎用水的pH值依次为2.031 1、7.495 5、8.419 3,3煎总计时间为4.016 2 h.[结论]结合实际生产,确定3煎用水的pH值依次为2.0、7.5、8.5;提取时间依次为2、1、1h.%[Objective] To optimize the semi-bionic extraction condition for Zhizi Baipi decoction. [Methods] Using the uniform design and taking the extracted material ≤ 1 000 u of molecular weight, Geniposide, berberine, glycyrrhetinic acid and total alkaloids as the index and under the same condition of the prescription specifications, the temperature of decocting and extracting, the used water volume,the filtration and concentration method, the art condition for semi-bionic extraction of this prescription was analyzed comprehensively and optimazed. [Results] The pH value of the three times of decocting water was 2.031 1, 7.495 5 and 8.419 3. The total boiling time was 4.016 2 h. [Conclusion] In combination with actual production it was determined that the pH value for the three times of decocting water was 2.0, 7.5, 8.5 in tern and the extracting course was 2 h, 1 h and 1 h respectively.

  18. Torque analysis on bionic model of bamboo weevil rostrum based on ANSYS%基于ANSYS的竹象虫头管仿生模型抗扭转分析

    Institute of Scientific and Technical Information of China (English)

    许顺; 佟金; 马云海; 李默

    2016-01-01

    their morphology. The reinforcing ribs perforated several axial layers and circumferential layers along the radial direction, but its size and distribution were very randomly. From the element spectrum diagrams and nanomechanical tests, it was found that the outer layer of rostrum contained carbon (C), hydrogen (H), nitrogen (N) and oxygen (O), which are essential elements to composite chitin, and furthermore, it also contained inorganic salts like silicon (Si), magnesium (Mg) and potassium (K). And in this layer, the elasticity modulus, hardness and stiffness were 3.074 GPa, 182.254 MPa and 8.12μN/nm, respectively. The main component of axial layers was saccharides or lipid that was dependent on the chemical union of C, H and O, and its elasticity modulus, hardness and stiffness were 3.152 GPa, 121.392 MPa and 10.283μN/nm, respectively. The circumferential layers contained C, H, N, O and chlorine (Cl), and its elasticity modulus, hardness and stiffness were the highest, which were 8.645 GPa, 246.620 MPa and 19.695 μN/nm, respectively. From the measurement result, the main characteristics of bamboo weevil rostrum could be found. First, rostrum was a hollow multilayer pipe, which had nice strength and stiffness. Second, the outer layer was chitin, the axial layers consisted of sheet saccharides or lipid, and the circumferential layers contained protein and fibers. Specially, the circumferential layers had excellent mechanical capacity that made the rostrum more powerful. Third, the thickness of each axial layer changed in a certain sequence from outside to inside. In addition, the radial ribs connected several layers, which was conducive to better balance the stress and deformation on different bearing layers. Finally, the bionic multilayer pipes designed by learning the rostrum were modeled after appropriate simplification and majorization, and the torsional deformation was examined. The finite element analysis (FEA) method was applied to analyze the rationality of

  19. 多控制面机器鱼结构设计及尾鳍动力学数学模型构建%Dynamic Math Mode Building of Tail Fin and Structure Design of Control Surface Bionic Robotic-fish

    Institute of Scientific and Technical Information of China (English)

    王卫兵; 杨红伟; 晁贯良; 牛健文

    2012-01-01

    The structure of control surface biomimetic robotic-fish was designed, which included tail fin, pectoral fin, pelvic fin, and pinna dorsalis combining propulsion. On the basis of the characteristic of structure, the swimming balance of bionic robotic-fish was achieved by controlling the each part of propulsion system. The dynamic math model of tail fin of four-joint robotic-fish was built using the theory of planar wave plank and Lagrange equation. The academic base for the relation of the kinetic parameters of robotic-fish is prepared by the model.%设计了多控制面仿生机器鱼结构,包括尾鳍、胸鳍、腹鳍、背鳍的联合推进.根据其结构特点,对机器鱼推进系统的各关节进行控制从而实现仿生机器鱼前进的平衡性,主要利用二维波动板理论和Lagrange方程建立了四关节仿生机器鱼尾鳍的动力学数学模型,该模型建立了仿生机器鱼各个运动参数之间的关系.

  20. Gait Analysis on Bionic Kangaroo-hopping Robot Based on Adjustable Geared Five-linkage Mechanism%基于可调齿轮-五杆机构的仿袋鼠跳跃机器人运动步态分析

    Institute of Scientific and Technical Information of China (English)

    柴辉; 李建华; 葛文杰

    2009-01-01

    设计了一种可调齿轮-五杆仿袋鼠跳跃机器人,实现了能量的可调.利用ADAMS软件对机器人的结构参数进行了优选,按姿态调整、储能、起跳腾宅、着地复位的动作顺序对机器人一个跳跃循环过程中的运动步态进行了分析.采用简化的双质量-非线性弹簧模型对起跳条件和质心受力情况进行了分析.最后给出了仿真和实验结果,证实了设计方案的可行性.%A bionic kangaroo-hopping robot based on adjustable geared five-linkage mechanism is designed in order to realize energy adjustable. Optimal selection of structure parameter of robot is accomplished by ADAMS software. The robot gait in a hopping cycle is also analyzed by the action sequence which includes attitude adjustment, energy storage, takeoff and flight, landing and reset. Simplified double mass-nonlinear spring model is established in order to analyze the takeoff condition and the forces on centroid. At last, the simulation and experiment results are given to prove the feasibility of the design.

  1. Analysis of the Course and Efficacy of Bionics-physics Method for the Treatment of Female Patients with Mild and Moderate Stress Urinary Incontinence%仿生物理治疗女性轻、中度压力性尿失禁的疗程及疗效分析

    Institute of Scientific and Technical Information of China (English)

    阳笑; 杨静

    2014-01-01

    【目的】探讨仿生物理治疗女性轻、中度压力性尿失禁(SUI)的疗程及疗效。【方法】来本院就诊的SUI患者93例,其中轻度组62例,根据治疗意愿分为轻度1组31例,轻度2组31例;中度组31例。轻度1组应用PHENIX USB 4盆底功能治疗仪行系统仿生物理治疗1疗程(基础治疗,每次30 min ,每周2次,共15次),轻度2组及中度组予系统仿生物理治疗三疗程(巩固治疗),疗程间间隔1个月,于基础治疗后及巩固治疗一年后判定疗效。【结果】一个疗程治疗后,轻度组62例中61例(98.39%)有效,其中57例(91.94%)治愈;中度组31例中24例(77.42%)有效,19例(61.29%)治愈。轻度2组及中度组继续行巩固治疗。疗程结束后一年评估:轻度1组中25例(80.65%)仍有效,其中23例(74.19%)治愈;轻度2组30例(96.77%)有效,29例(93.55%)治愈;中度组28例(90.32%)有效,26例(83.87%)治愈。轻度组有效率及治愈率显著高于中度组( P <0.05, P <0.01);轻度2组一年有效率及治愈率均稍高于中度组,但差异均无统计学意义( P >0.05);轻度2组一年后治愈率高于轻度1组,差异有统计学意义( P <0.05)。【结论】仿生物理治疗对轻、中度SUI均能有效缓解症状甚至治愈,应用三个疗程的巩固治疗的疗效优于一个疗程的基础治疗。%[Objective] To explore the course and efficacy of bionics-physics method for the treatment of fe-male patients with mild and moderate stress urinary incontinence (SUI) .[Methods]Totally 93 patients with SUI in our hospital were divided into mild group( n=62) and moderate group( n=31) .According to treatment will ,the mild group was divided into mild I group( n =31) and mild II group( n=31) .The mild I group received bionics-physics treatment by using PHENIX USB 4 pelvic floor function

  2. Bionic mechanics of customized cellular bio-magnesium scaffolds for large-area defects of femoral shafts and implants for orthopaedics surgery%股骨干大面积缺损多孔生物镁支架和骨科植入物的仿生力学

    Institute of Scientific and Technical Information of China (English)

    赵为民; 李秉哲; 唐六丁; Peter Paul Müler

    2014-01-01

    financial y by German Academic Exchange Service, visiting the Department of Molecule Biotechnology, German Helmholtz Center of Infection Research, Braunschweig, Germany, creating the cooperation relation to research into the project“Fundament and Application of Biomimetic Technology for Customized cellular Biomagnesium Scaffolds of Loaded Tissue Engineering Bones”, finishing the present work and“Investigation on the Nanosize and Zeta(ξ)-potential of Polyelectrolytes for Biomimetic Coating Technology”. OBJECTIVE:To focus on studying bionic mechanics between cellular scaffolds, customized for large area defects of femoral shafts, and new ingrown bones, as wel as bionic mechanics between host bones and platelike implants for orthopaedics surgery, by means of elastic mechanics and stereo-quantitative metal ographic analysis, and proposing the principle of bionic mechanics and the design criterion for above mentioned two types of problems, also some directions for research and development. METHODS:Different types of micro-volume models for two types of composites, i.e., cellular scaffolds/new-growing bones bio-composites, as wel as plate-like implants/host bones layered composites were created, as wel as different modulus mixing rules and mechanical stresses, i.e., stimuli, were presented, respectively. RESULTS AND CONCLUSION:Under the different modulus and volume fractions of scaffold materials, the mechanical stimuli of new ingrown bones are compared:(1) except cellular tantalum, the strength of cellular metal ic scaffolds/new ingrown bones composites is obviously much higher than that of original host bones, to enable resolving the problem on insufficient mechanical strengths in early period of implanting the compound between partial demineralized bone scaffolds and autogenous human bone marrow mesenchymal stem cells, as wel as other organic or inorganic scaffolds for tissue engineering. (2) The less the modulus and volume fraction of materials for cellular scaffold

  3. 双足机器人自适应常值驱动与传感反馈结合的仿生行走控制%Bionic walking control based on adaptive constant torque and sensory feedback for the biped robot

    Institute of Scientific and Technical Information of China (English)

    刘丽梅; 田彦涛

    2013-01-01

    To make the chaotic gaits converge to a stable cycle gait, a control algorithm is proposed for the biped robot with knees. Firstly, the passive gaits changes with the changing of the slope are studied by using the Poincarésection method. It shows that the increasing of the ground slope will result in the appearance of period-doubling and chaotic gaits. Then, based on the biomechanics in human walking and delayed feedback control theory, bionic walking control based on adaptive constant torque and sensory feedback for the biped robot is designed. The controller parameters are regulated gradually in terms of the initial states of the current step and the first two steps. Finally, the chaotic gaits converge to the cycle gaits with this controller. Simulation results show the effectiveness of the presented control algorithm.%  为了将双足机器人的混沌步态控制收敛到稳定的周期步态,提出一种控制策略。首先用庞卡莱截面法研究斜坡倾角变化对步态的影响,结果表明,坡度增大会导致倍周期步态到混沌步态的产生;然后以人类步行的生物力学为仿生依据,根据延迟反馈控制的基本思路,设计了自适应常值驱动与传感反馈相结合的仿生行走控制策略,并依据当前步和前两步初始状态对控制器参数进行逐步调节,最终将混沌步态控制收敛到周期步态。仿真结果表明了所提出算法的有效性。

  4. Piezoelectric Pump Used in Bionic Underwater Propulsion Unit

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A new piezoelectric pump can pump liquid either forward or backward and adjust the flow rate. Thus an object can be driven forward or backward at different speeds. The driver of the pump, a circular piezoelectric plate, is modelled by Finite Element Method (FEM) in ANSYS and its performance is simulated and analyzed. The pump gives the best performance when the driving signals of the inlet and outlet valves have a bigger duty cycle and the plate has a higher voltage applied.

  5. Bionic hand exoprosthesis – Perspectives for the future in Romania

    OpenAIRE

    Pogarasteanu, ME; Barbilian, AG

    2014-01-01

    Prosthetics is a modern area of interest and a challenge in Orthopedics. Over time, there has been a transition from an artisanal method of prosthetics production to modern concepts and materials, including a re-education through virtual reality. The conditions for an efficient fitting of a prosthesis include the necessity that the prosthesis respects the form and function of the lost limb, both anatomically and biomechanically. Prosthetics are made individually, personalized according to sex...

  6. Chip-scale hermetic feedthroughs for implantable bionics.

    Science.gov (United States)

    Guenther, Thomas; Dodds, Christopher W D; Lovell, Nigel H; Suaning, Gregg J

    2011-01-01

    Most implantable medical devices such as cochlear implants and visual prostheses require protection of the stimulating electronics. This is achieved by way of a hermetic feedthrough system which typically features three important attributes: biocompatibility with the human body, device hermeticity and density of feedthrough conductors. On the quest for building a visual neuroprosthesis, a high number of stimulating channels is required. This has encouraged new technologies with higher rates of production yield and further miniaturization. An Al(2)O(3) based feedthrough system has been developed comprising up to 20 platinum feedthroughs per square millimeter. Ceramics substrates are shown to have leak rates below 1 × 10(-12) atm × cc/s, thus exceeding the resolution limits of most commercially available leak detectors. A sheet resistance of 0.05 Ω can be achieved. This paper describes the design, fabrication process and hermeticity testing of high density feedthroughs for use in neuroprosthetic implants. PMID:22255880

  7. Bionic hand exoprosthesis--perspectives for the future in Romania.

    Science.gov (United States)

    Pogarasteanu, M E; Barbilian, A G

    2014-01-01

    Prosthetics is a modern area of interest and a challenge in Orthopedics. Over time, there has been a transition from an artisanal method of prosthetics production to modern concepts and materials, including a re-education through virtual reality. The conditions for an efficient fitting of a prosthesis include the necessity that the prosthesis respects the form and function of the lost limb, both anatomically and biomechanically. Prosthetics are made individually, personalized according to sex, age, physiological characteristics, profession and preference. In our country, thoracic limb prosthetics has a relatively short-recorded history of approximately a century, the most preeminent centers being in Iasi, Cluj and Bucharest. Currently, thoracic limb prosthetics, and particularly hand prosthetics, are in a period of development. A technique for amputation and stump reamputation called "circumferential osteoneuromioplasty" (CONM) is currently being used in the Orthopedics and Trauma Clinic of the Central Military University Emergency Hospital in Bucharest. The method was created with the purpose of obtaining distinct myoelectric signals of better quality, following the contraction of each muscle. The CONM method can be used in conjuncture with both the new hand prostheses that are currently available in Romania, and with the model that is being developed by a mixed team from the Polytechnic University in Bucharest, in collaboration with the Central Military University Emergency Hospital in Bucharest. PMID:25713630

  8. Bionic development of textile materials for harvesting water from fog

    Science.gov (United States)

    Sarsour, J.; Stegmaier, Th.; Linke, M.; Planck, H.

    2010-07-01

    The supply of drinking water is one of the great challenges for mankind in the future. At present about one billion people have no access to clean drinking water. Particularly in developing countries the supply of potable water is often insufficient. A centralized water supply can often not be implemented because of technical and logistical problems. In certain remote areas, a connection to a public water supply net is economically or technically not feasible, e.g. in settlements on small islands, in isolated sea bays or in mountainous areas. Water supply represents a fundamental problem for terrestrial organisms. In fact, plants and animals of dry areas have developed various methods for obtaining water. The potential for a technical transfer of these natural solutions is far from being well evaluated. An example for obtaining water in arid environments is fog harvesting. Particularly in environments which receive extremely low rates of precipitation, organisms can be found which are capable of obtaining water from fog. The goal of this project is a detailed study of the underlying strategies and mechanisms and their application in technical devices for fog harvesting of drinking water. The project concentrates on the development of textile materials which are optimized for their use in large harvesting collector arrays that are able to supply multi-family houses and/or schools up to smaller villages with water. We expect that techniques can also be used in irrigation systems. The lecture presents the transfer strategy of biological strategies into textile-based devices and first successful field studies.

  9. Advances in Propulsive Bionic Feet and Their Actuation Principles

    OpenAIRE

    Cherelle, Pierre; Mathijssen, Glenn; Wang, Qining; Vanderborght, Bram; lefeber, Dirk

    2014-01-01

    In the past decades, researchers have deeply studied pathological and nonpathological gait to understand the human ankle function during walking. These efforts resulted in the development of new lower limb prosthetic devices aiming at raising the 3C-level (control, comfort, and cosmetics) of amputees. Thanks to the technological advances in engineering and mechatronics, challenges in the field of prosthetics have become an important source of interest for roboticists. Currently, most of the b...

  10. Bionic Duplication of Fresh Navodon septentrionalis Fish Surface Structures

    Directory of Open Access Journals (Sweden)

    Bing Qu

    2011-01-01

    Full Text Available Biomimetic superhydrophobic surface was fabricated by replicating topography of the fresh fish skin surface of Navodon septentrionalis with polydimethylsiloxane (PDMS elastomer. A two-step replicating method was developed to make the surface structure of the fresh fish skin be replicated with high fidelity. After duplication, it was found that the static contact angle of the replica was as large as 173°. Theoretic analysis based on Young's and Cassie-Baxter (C-B model was performed to explain the relationship between structure and hydrophobicity.

  11. Development of a Magnetic Attachment Method for Bionic Eye Applications.

    Science.gov (United States)

    Fox, Kate; Meffin, Hamish; Burns, Owen; Abbott, Carla J; Allen, Penelope J; Opie, Nicholas L; McGowan, Ceara; Yeoh, Jonathan; Ahnood, Arman; Luu, Chi D; Cicione, Rosemary; Saunders, Alexia L; McPhedran, Michelle; Cardamone, Lisa; Villalobos, Joel; Garrett, David J; Nayagam, David A X; Apollo, Nicholas V; Ganesan, Kumaravelu; Shivdasani, Mohit N; Stacey, Alastair; Escudie, Mathilde; Lichter, Samantha; Shepherd, Robert K; Prawer, Steven

    2016-03-01

    Successful visual prostheses require stable, long-term attachment. Epiretinal prostheses, in particular, require attachment methods to fix the prosthesis onto the retina. The most common method is fixation with a retinal tack; however, tacks cause retinal trauma, and surgical proficiency is important to ensure optimal placement of the prosthesis near the macula. Accordingly, alternate attachment methods are required. In this study, we detail a novel method of magnetic attachment for an epiretinal prosthesis using two prostheses components positioned on opposing sides of the retina. The magnetic attachment technique was piloted in a feline animal model (chronic, nonrecovery implantation). We also detail a new method to reliably control the magnet coupling force using heat. It was found that the force exerted upon the tissue that separates the two components could be minimized as the measured force is proportionately smaller at the working distance. We thus detail, for the first time, a surgical method using customized magnets to position and affix an epiretinal prosthesis on the retina. The position of the epiretinal prosthesis is reliable, and its location on the retina is accurately controlled by the placement of a secondary magnet in the suprachoroidal location. The electrode position above the retina is less than 50 microns at the center of the device, although there were pressure points seen at the two edges due to curvature misalignment. The degree of retinal compression found in this study was unacceptably high; nevertheless, the normal structure of the retina remained intact under the electrodes.

  12. Bionic Control of Cheetah Bounding with a Segmented Spine.

    Science.gov (United States)

    Wang, Chunlei; Wang, Shigang

    2016-01-01

    A cheetah model is built to mimic real cheetah and its mechanical and dimensional parameters are derived from the real cheetah. In particular, two joints in spine and four joints in a leg are used to realize the motion of segmented spine and segmented legs which are the key properties of the cheetah bounding. For actuating and stabilizing the bounding gait of cheetah, we present a bioinspired controller based on the state-machine. The controller mainly mimics the function of the cerebellum to plan the locomotion and keep the body balance. The haptic sensor and proprioception system are used to detect the trigger of the phase transition. Besides, the vestibular modulation could perceive the pitching angle of the trunk. At last, the cerebellum acts as the CPU to operate the information from the biological sensors. In addition, the calculated results are transmitted to the low-level controller to actuate and stabilize the cheetah bounding. Moreover, the delay feedback control method is employed to plan the motion of the leg joints to stabilize the pitching motion of trunk with the stability criterion. Finally, the cyclic cheetah bounding with biological properties is realized. Meanwhile, the stability and dynamic properties of the cheetah bounding gait are analyzed elaborately.

  13. A Bionic Polarization Navigation Sensor and Its Calibration Method.

    Science.gov (United States)

    Zhao, Huijie; Xu, Wujian

    2016-01-01

    The polarization patterns of skylight which arise due to the scattering of sunlight in the atmosphere can be used by many insects for deriving compass information. Inspired by insects' polarized light compass, scientists have developed a new kind of navigation method. One of the key techniques in this method is the polarimetric sensor which is used to acquire direction information from skylight. In this paper, a polarization navigation sensor is proposed which imitates the working principles of the polarization vision systems of insects. We introduce the optical design and mathematical model of the sensor. In addition, a calibration method based on variable substitution and non-linear curve fitting is proposed. The results obtained from the outdoor experiments provide support for the feasibility and precision of the sensor. The sensor's signal processing can be well described using our mathematical model. A relatively high degree of accuracy in polarization measurement can be obtained without any error compensation.

  14. Bionic hand : replicating the human hand through 3D printing

    OpenAIRE

    Gulbrandsen, Stefan Meiforth

    2015-01-01

    Norsk Denne master oppgaven utforsker mulighetene til en av de mest moderne 3D printerne til dags dato. Ved å lage en hån med dens ligamenter, sener og bein system viser den hvor langt det er mulig å presse teknologien mot å utvikle biologisk inspirerte proteser og robotikk. Ved å gjøre dette kan den inspirere andre til å lage mer naturlige strømgjerrige proteser.

  15. Nanocarbon-Coated Porous Anodic Alumina for Bionic Devices

    OpenAIRE

    Morteza Aramesh; Wei Tong; Kate Fox; Ann Turnley; Dong Han Seo; Steven Prawer; Kostya (Ken) Ostrikov

    2015-01-01

    A highly-stable and biocompatible nanoporous electrode is demonstrated herein. The electrode is based on a porous anodic alumina which is conformally coated with an ultra-thin layer of diamond-like carbon. The nanocarbon coating plays an essential role for the chemical stability and biocompatibility of the electrodes; thus, the coated electrodes are ideally suited for biomedical applications. The corrosion resistance of the proposed electrodes was tested under extreme chemical conditions, su...

  16. Bionic Control of Cheetah Bounding with a Segmented Spine

    OpenAIRE

    Chunlei Wang; Shigang Wang

    2016-01-01

    A cheetah model is built to mimic real cheetah and its mechanical and dimensional parameters are derived from the real cheetah. In particular, two joints in spine and four joints in a leg are used to realize the motion of segmented spine and segmented legs which are the key properties of the cheetah bounding. For actuating and stabilizing the bounding gait of cheetah, we present a bioinspired controller based on the state-machine. The controller mainly mimics the function of the cerebellum to...

  17. Design and Testing of a Bionic Dancing Prosthesis

    OpenAIRE

    Rouse, Elliott J.; Nathan C Villagaray-Carski; Emerson, Robert W.; Herr, Hugh M

    2015-01-01

    Traditionally, prosthetic leg research has focused on improving mobility for activities of daily living. Artistic expression such as dance, however, is not a common research topic and consequently prosthetic technology for dance has been severely limited for the disabled. This work focuses on investigating the ankle joint kinetics and kinematics during a Latin-American dance to provide unique motor options for disabled individuals beyond those of daily living. The objective of this study was ...

  18. Bionic Duplication of Fresh Navodon septentrionalis Fish Surface Structures

    OpenAIRE

    Xiaohui Zhou; Zhongze Gu; Chao Pan; Lanlan Pan; Jing Wang; Bing Qu

    2011-01-01

    Biomimetic superhydrophobic surface was fabricated by replicating topography of the fresh fish skin surface of Navodon septentrionalis with polydimethylsiloxane (PDMS) elastomer. A two-step replicating method was developed to make the surface structure of the fresh fish skin be replicated with high fidelity. After duplication, it was found that the static contact angle of the replica was as large as 173°. Theoretic analysis based on Young's and Cassie-Baxter (C-B) model was performed to expla...

  19. Medicalization: Current Concept and Future Directions in a Bionic Society

    OpenAIRE

    Antonio Maturo

    2012-01-01

    The article illustrates the main features of the concept of medicalization, starting from its theoretical roots. Although it is the process of extending the medical gaze on human conditions, it appears that medicalization cannot be strictly connected to medical imperialism anymore. Other "engines" of medicalization are influential: consumers, biotechnology and managed care. The growth of research and theoretical reflections on medicalization has led to the proposal of other parallel concepts ...

  20. A Bionic Polarization Navigation Sensor and Its Calibration Method.

    Science.gov (United States)

    Zhao, Huijie; Xu, Wujian

    2016-01-01

    The polarization patterns of skylight which arise due to the scattering of sunlight in the atmosphere can be used by many insects for deriving compass information. Inspired by insects' polarized light compass, scientists have developed a new kind of navigation method. One of the key techniques in this method is the polarimetric sensor which is used to acquire direction information from skylight. In this paper, a polarization navigation sensor is proposed which imitates the working principles of the polarization vision systems of insects. We introduce the optical design and mathematical model of the sensor. In addition, a calibration method based on variable substitution and non-linear curve fitting is proposed. The results obtained from the outdoor experiments provide support for the feasibility and precision of the sensor. The sensor's signal processing can be well described using our mathematical model. A relatively high degree of accuracy in polarization measurement can be obtained without any error compensation. PMID:27527171

  1. Bionic Control of Cheetah Bounding with a Segmented Spine

    Directory of Open Access Journals (Sweden)

    Chunlei Wang

    2016-01-01

    Full Text Available A cheetah model is built to mimic real cheetah and its mechanical and dimensional parameters are derived from the real cheetah. In particular, two joints in spine and four joints in a leg are used to realize the motion of segmented spine and segmented legs which are the key properties of the cheetah bounding. For actuating and stabilizing the bounding gait of cheetah, we present a bioinspired controller based on the state-machine. The controller mainly mimics the function of the cerebellum to plan the locomotion and keep the body balance. The haptic sensor and proprioception system are used to detect the trigger of the phase transition. Besides, the vestibular modulation could perceive the pitching angle of the trunk. At last, the cerebellum acts as the CPU to operate the information from the biological sensors. In addition, the calculated results are transmitted to the low-level controller to actuate and stabilize the cheetah bounding. Moreover, the delay feedback control method is employed to plan the motion of the leg joints to stabilize the pitching motion of trunk with the stability criterion. Finally, the cyclic cheetah bounding with biological properties is realized. Meanwhile, the stability and dynamic properties of the cheetah bounding gait are analyzed elaborately.

  2. Computer-Assisted Law Instruction: Clinical Education's Bionic Sibling

    Science.gov (United States)

    Henn, Harry G.; Platt, Robert C.

    1977-01-01

    Computer-assisted instruction (CAI), like clinical education, has considerable potential for legal training. As an initial Cornell Law School experiment, a lesson in applying different corporate statutory dividend formulations, with a cross-section of balance sheets and other financial data, was used to supplement regular class assignments.…

  3. Bionic hand exoprosthesis--perspectives for the future in Romania.

    Science.gov (United States)

    Pogarasteanu, M E; Barbilian, A G

    2014-01-01

    Prosthetics is a modern area of interest and a challenge in Orthopedics. Over time, there has been a transition from an artisanal method of prosthetics production to modern concepts and materials, including a re-education through virtual reality. The conditions for an efficient fitting of a prosthesis include the necessity that the prosthesis respects the form and function of the lost limb, both anatomically and biomechanically. Prosthetics are made individually, personalized according to sex, age, physiological characteristics, profession and preference. In our country, thoracic limb prosthetics has a relatively short-recorded history of approximately a century, the most preeminent centers being in Iasi, Cluj and Bucharest. Currently, thoracic limb prosthetics, and particularly hand prosthetics, are in a period of development. A technique for amputation and stump reamputation called "circumferential osteoneuromioplasty" (CONM) is currently being used in the Orthopedics and Trauma Clinic of the Central Military University Emergency Hospital in Bucharest. The method was created with the purpose of obtaining distinct myoelectric signals of better quality, following the contraction of each muscle. The CONM method can be used in conjuncture with both the new hand prostheses that are currently available in Romania, and with the model that is being developed by a mixed team from the Polytechnic University in Bucharest, in collaboration with the Central Military University Emergency Hospital in Bucharest.

  4. Development of a BIONic muscle spindle for prosthetic proprioception.

    Science.gov (United States)

    Sachs, Nicholas A; Loeb, Gerald E

    2007-06-01

    The replacement of proprioceptive function, whether for conscious sensation or feedback control, is likely to be an important aspect of neural prosthetic restoration of limb movements. Thus far, however, it has been hampered by the absence of unobtrusive sensors. We propose a method whereby fully implanted, telemetrically operated BIONs monitor muscle movement, and thereby detect changes in joint angle(s) and/or limb posture without requiring the use of secondary components attached to limb segments or external reference frames. The sensor system is designed to detect variations in the electrical coupling between devices implanted in neighboring muscles that result from changes in their relative position as the muscles contract and stretch with joint motion. The goal of this study was to develop and empirically validate mathematical models of the sensing scheme and to use computer simulations to provide an early proof of concept and inform design of the overall sensor system. Results from experiments using paired dipoles in a saline bath and finite element simulations have given insight into the current distribution and potential gradients exhibited within bounded anisotropic environments similar to a human limb segment and demonstrated an anticipated signal to noise ratio of at least 8:1 for submillimeter resolution of relative implant movement over a range of implant displacements up to 15 cm.

  5. Image Compression and Resizing for Retinal Implant in Bionic Eye

    Directory of Open Access Journals (Sweden)

    N.Sharmili

    2011-06-01

    Full Text Available One field where computer-related Image processing technology shows great promise for the future isbionic implants such as Cochlear implants, Retinal implants etc.. Retinal implants are being developedaround the world in hopes of restoring useful vision for patients suffering from certain types of diseaseslike Age-related Macular Degeneration (AMD and Retinitis Pigmentosa (RP. In these diseases thephotoreceptor cells slowly degenerated, leading to blindness. However, many of the inner retinalneurons that transmit signals from the photoreceptors to the brain are preserved to a large extent for aprolonged period of time. The Retinal Prosthesis aims to provide partial vision by electricallyactivating the remaining cells of the retina. The Epi retinal prosthesis system is composed of twounits, extra ocular unit and intraocular implant. The two units are connected by a telemetric inductivelink. The Extraocular unit consists of a CCD camera, an image processor, an encoder, and a transmitterbuilt on the eyeglass. High-resolution image from a CCD camera is reduced to lower resolutionmatching the array of electrodes by image processor, which is then encoded into bit stream. Eachelectrode in an implant corresponds to one pixel in an image. The bit stream is modulated on a 22 MHzcarrier and then transmitted wirelessly to the inside implant. This paper mainly discusses twoapproaches in image processing which reduces the size of the image without loss of the object detectionrate to that of the original image. One is about the related image processing algorithms include imageresizing, color erasing, edge enhancement and edge detection. Second one is to generate the saliencymap for an image.

  6. Advances in implantable bionic devices for blindness: a review.

    Science.gov (United States)

    Lewis, Philip M; Ayton, Lauren N; Guymer, Robyn H; Lowery, Arthur J; Blamey, Peter J; Allen, Penelope J; Luu, Chi D; Rosenfeld, Jeffrey V

    2016-09-01

    Since the 1950s, vision researchers have been working towards the ambitious goal of restoring a functional level of vision to the blind via electrical stimulation of the visual pathways. Groups based in Australia, USA, Germany, France and Japan report progress in the translation of retinal visual prosthetics from the experimental to clinical domains, with two retinal visual prostheses having recently received regulatory approval for clinical use. Regulatory approval for cortical visual prostheses is yet to be obtained; however, several groups report plans to conduct clinical trials in the near future, building upon the seminal clinical studies of Brindley and Dobelle. In this review, we discuss the general principles of visual prostheses employing electrical stimulation of the visual pathways, focusing on the retina and visual cortex as the two most extensively studied stimulation sites. We also discuss the surgical and functional outcomes reported to date for retinal and cortical prostheses, concluding with a brief discussion of novel developments in this field and an outlook for the future.

  7. A Bionic Polarization Navigation Sensor and Its Calibration Method

    Science.gov (United States)

    Zhao, Huijie; Xu, Wujian

    2016-01-01

    The polarization patterns of skylight which arise due to the scattering of sunlight in the atmosphere can be used by many insects for deriving compass information. Inspired by insects’ polarized light compass, scientists have developed a new kind of navigation method. One of the key techniques in this method is the polarimetric sensor which is used to acquire direction information from skylight. In this paper, a polarization navigation sensor is proposed which imitates the working principles of the polarization vision systems of insects. We introduce the optical design and mathematical model of the sensor. In addition, a calibration method based on variable substitution and non-linear curve fitting is proposed. The results obtained from the outdoor experiments provide support for the feasibility and precision of the sensor. The sensor’s signal processing can be well described using our mathematical model. A relatively high degree of accuracy in polarization measurement can be obtained without any error compensation. PMID:27527171

  8. Biooniline arhitektuur = Bionic Architecture / Mihkel Tüür

    Index Scriptorium Estoniae

    Tüür, Mihkel

    2008-01-01

    Autori arvates on meil tohutult õppida, jõudmaks ruumilises ja materiaalses efektiivsuses elementaarsele tasemele võrreldes loodusega. Looduses leiduvate ruumiliste struktuuride uurimine arhitektuuri rikastamiseks viib äratundmiseni tänapäeva arhitektuuri materjale raiskavast loomusest

  9. Chip-scale hermetic feedthroughs for implantable bionics.

    Science.gov (United States)

    Guenther, Thomas; Dodds, Christopher W D; Lovell, Nigel H; Suaning, Gregg J

    2011-01-01

    Most implantable medical devices such as cochlear implants and visual prostheses require protection of the stimulating electronics. This is achieved by way of a hermetic feedthrough system which typically features three important attributes: biocompatibility with the human body, device hermeticity and density of feedthrough conductors. On the quest for building a visual neuroprosthesis, a high number of stimulating channels is required. This has encouraged new technologies with higher rates of production yield and further miniaturization. An Al(2)O(3) based feedthrough system has been developed comprising up to 20 platinum feedthroughs per square millimeter. Ceramics substrates are shown to have leak rates below 1 × 10(-12) atm × cc/s, thus exceeding the resolution limits of most commercially available leak detectors. A sheet resistance of 0.05 Ω can be achieved. This paper describes the design, fabrication process and hermeticity testing of high density feedthroughs for use in neuroprosthetic implants.

  10. Biological and bionic hands: natural neural coding and artificial perception.

    Science.gov (United States)

    Bensmaia, Sliman J

    2015-09-19

    The first decade and a half of the twenty-first century brought about two major innovations in neuroprosthetics: the development of anthropomorphic robotic limbs that replicate much of the function of a native human arm and the refinement of algorithms that decode intended movements from brain activity. However, skilled manipulation of objects requires somatosensory feedback, for which vision is a poor substitute. For upper-limb neuroprostheses to be clinically viable, they must therefore provide for the restoration of touch and proprioception. In this review, I discuss efforts to elicit meaningful tactile sensations through stimulation of neurons in somatosensory cortex. I focus on biomimetic approaches to sensory restoration, which leverage our current understanding about how information about grasped objects is encoded in the brain of intact individuals. I argue that not only can sensory neuroscience inform the development of sensory neuroprostheses, but also that the converse is true: stimulating the brain offers an exceptional opportunity to causally interrogate neural circuits and test hypotheses about natural neural coding.

  11. Numerical simulation of bionic foils in tandem arrangement

    Directory of Open Access Journals (Sweden)

    Kai Zhou

    2016-05-01

    Full Text Available Based on the backgrounds of underwater propulsors with high hydrodynamic performance, the article focuses on the flapping foils in tandem arrangement and tries to formulate the physical mode and mathematical model of flapping propulsion. Using the commercial software Fluent, the governing equations are discretized by the finite volume method, and dynamic mesh method is adopted to solve the moving boundaries. In order to verify validity and feasibility of the method, hydrodynamic performance of single flapping foil is analyzed. The present results of single flapping foil compare well with those in experimental researches. After that, numerical simulations of flapping foils in tandem arrangement are conducted to reveal the energy absorption mechanisms. By extracting performance parameters and characteristics of the flow field, the interaction between upstream foil and downstream foil is analyzed. The results indicate that the vortices shedding from upstream foil have a significant effect on the hydrodynamic performance of downstream foil, and the downstream foil can use energy from the flow field to improve the hydrodynamic performance. Therefore, the hydrodynamic performance of the system can be improved by adjusting the locations of foils and motion parameters.

  12. 京尼平交联仿骨结构诱导性骨组织工程支架材料的制备与表征%Preparation and characterization of inducible bone repair composite scaffold with genipin-crosslinked bionic bone structure

    Institute of Scientific and Technical Information of China (English)

    李根; 李文杰; 唐俊杰; 王九娜; 赵玲; 秦文; 赵兴绪; 赵红斌

    2015-01-01

    BACKGROUND:Although there is a certain progress in the preparation of tissue-engineered bone tissue using a variety of materials, some deficiencies have appeared such as mismatching between scaffold degradation rate and new bone formation rate, slow tissue growth, toxic metabolites. OBJECTIVE:To build a new type of inducible bone repair composite scaffold with bionic bone structurematerials and to evaluate its physicochemical and biological properties. METHODS: Icarin encapsulated by chitosan was used to prepare drug-loaded microspheres, and the drug release rate of the microspheres was detected. Chitosan microspheres were mixed with colagen to build the core part of scaffold materials. Hydroxyapatite (HA), polycaprolactone (PCL) and colagen were mixed in hexafluoride isopropanol (HFIP) to prepare the HA/PCL/colagen outer part of composite scaffold material at the rate of 0:3:3, 1:3:3, 2:3:3, 3:3:3. Each proportional electrospinning was used for one layer, and finaly the 4-layer outer tube of the scaffold was produced. The tube core and outer tube were crosslinked by 1% genipin. Universal material testing machine, surface contact angle meter, infrared spectroscopy, scanning electron microscope, water absorption, permeability, porosity,in vitro degradation tests for cross-linked and uncross-linked were used to observe the structure and characteristics of tubular materials. Bone marrow mesenchymal stem cels were seeded on the surface of cross-linked and uncross-linked bone repair materials to evaluate the biocompatibility of the scaffolds. Cross-linked and uncross-linked bone repair materials were implanted subcutaneously into Wistar rats to evaluate the histocompatibility of the scaffolds. RESULTS AND CONCLUSION:The drug in the scaffold had a suitable release; the bone scaffold material had good uniformity, and cross-linked scaffolds materials had better mechanical properties, water absorption and permeability than the uncross-linked(P   目的:构建一种

  13. FY 1997 research and development of fusion domains. Part 2. Studies on bionic design; 1997 nendo seika hokokusho (yugo ryoiki kenkyu kaihatsu). 1. Bionic design no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Studies were conducted on actuator function in bio materials, cells, structures, and living organisms, and on structuring a biological molecule machine. In the study on soft biological structures, biological compatibility of artificial glass bodies using ultra-polymeric PVA was found very high, raising expectation on feasibility of their practical use. Three-dimensional structure of glass bodies was made clear for the first time in the world. As a result of separating and purifying cells from a liver for the first time in the world, it was indicated that excellent proliferation performance and differentiation into cells are shown. With regard to hydroxyapatite in hard biological structure such as bones and teeth, single crystals were synthesized, and growth rate on the surface C was measured successfully. For molecular motors, studies are being performed on functions of twin-head structure in biological protein enzyme. In molecule structuring, studies were conducted on preparation of a hydrogenase LB membrane as an electric-hydrogen energy conversion element, and structuring of protein molecular structure using gene recombination. 69 refs., 37 figs., 8 tabs.

  14. Restudies on Body Surface of Dung Beetle and Application of Its Bionics Flexible Technique

    Institute of Scientific and Technical Information of China (English)

    Jiurong Sun; Jianqiao Li; Hong Cheng; Zhendong Dai; Luquan Ren

    2004-01-01

    A scanning electron microscope was used to observe the structures of the setae on the surface of a dung beetle Copris ochus, Motschulsky. There are lots of setae on the body surface, especially on the ventral part surface and lateral to the legs which are different in size, arrangement and shape. These setae have different lengths and many thorns on the whole seta. The top ends of these setae stand up without furcations which direct uprightly towards the surface of the touched soil. By the method of removing these setae, getting the insect weight before and after digging into the dung we affirm farther that the setae on the beetle body surface form the anti-stick and non-adherent gentle interface. The soil machines and components made by imitating the gentle body surface of beetles have favorable non-adherent results.

  15. Infrared-based blink-detecting glasses for facial pacing: toward a bionic blink.

    Science.gov (United States)

    Frigerio, Alice; Hadlock, Tessa A; Murray, Elizabeth H; Heaton, James T

    2014-01-01

    IMPORTANCE Facial paralysis remains one of the most challenging conditions to effectively manage, often causing life-altering deficits in both function and appearance. Facial rehabilitation via pacing and robotic technology has great yet unmet potential. A critical first step toward reanimating symmetrical facial movement in cases of unilateral paralysis is the detection of healthy movement to use as a trigger for stimulated movement. OBJECTIVE To test a blink detection system that can be attached to standard eyeglasses and used as part of a closed-loop facial pacing system. DESIGN, SETTING, AND PARTICIPANTS Standard safety glasses were equipped with an infrared (IR) emitter-detector unit, oriented horizontally across the palpebral fissure, creating a monitored IR beam that became interrupted when the eyelids closed, and were tested in 24 healthy volunteers from a tertiary care facial nerve center community. MAIN OUTCOMES AND MEASURES Video-quantified blinking was compared with both IR sensor signal magnitude and rate of change in healthy participants with their gaze in repose, while they shifted their gaze from central to far-peripheral positions, and during the production of particular facial expressions. RESULTS Blink detection based on signal magnitude achieved 100% sensitivity in forward gaze but generated false detections on downward gaze. Calculations of peak rate of signal change (first derivative) typically distinguished blinks from gaze-related eyelid movements. During forward gaze, 87% of detected blink events were true positives, 11% were false positives, and 2% were false negatives. Of the 11% false positives, 6% were associated with partial eyelid closures. During gaze changes, false blink detection occurred 6% of the time during lateral eye movements, 10% of the time during upward movements, 47% of the time during downward movements, and 6% of the time for movements from an upward or downward gaze back to the primary gaze. Facial expressions disrupted sensor output if they caused substantial squinting or shifted the glasses. CONCLUSIONS AND RELEVANCE Our blink detection system provides a reliable, noninvasive indication of eyelid closure using an invisible light beam passing in front of the eye. Future versions will aim to mitigate detection errors by using multiple IR emitter-detector units mounted on glasses, and alternative frame designs may reduce shifting of the sensors relative to the eye during facial movements. PMID:24699708

  16. One-step synthesis of natural silk sericin-based microcapsules with bionic structures.

    Science.gov (United States)

    Liu, Zhaogang; Cai, Yurong; Jia, Yaru; Liu, Lin; Kong, Xiangdong; Kundu, Subhas C; Yao, Juming

    2014-10-01

    Different techniques are being developed for fabricating microcapsules; it is still a challenge to fabricate them in an efficient and environment-friendly process. Here, a one-step green route to synthesize silk protein sericin-based microcapsules without any assistance of organic solvents is reported. By carefully changing the concentration of calcium ions accompanied with stirring, the morphology of the microcapsules can easily be regulated to form either discoidal, biconcave, cocoon-like, or tubular structures. The chelation of Ca(2+) and shearing force from agitation may induce the conformational transformation of sericin, which possibly results in the formation of microcapsules through the self-assembly of the protein subsequently. The as-prepared cocoon-like microcapsules exhibit pH-dependent stability. A potential application of microcapsules being fabricated from natural water-soluble silk protein sericin for controlled bioactive molecules loading and release system by a pH-triggered manner is quite feasible. PMID:25168858

  17. Producing 3D neuronal networks in hydrogels for living bionic device interfaces.

    Science.gov (United States)

    Aregueta-Robles, Ulises A; Lim, Khoon S; Martens, Penny J; Lovell, Nigel H; Poole-Warren, Laura A; Green, Rylie

    2015-08-01

    Hydrogels hold significant promise for supporting cell based therapies in the field of bioelectrodes. It has been proposed that tissue engineering principles can be used to improve the integration of neural interfacing electrodes. Degradable hydrogels based on poly (vinyl alcohol) functionalised with tyramine (PVA-Tyr) have been shown to support covalent incorporation of non-modified tyrosine rich proteins within synthetic hydrogels. PVA-Tyr crosslinked with such proteins, were explored as a scaffold for supporting development of neural tissue in a three dimensional (3D) environment. In this study a model neural cell line (PC12) and glial accessory cell line, Schwann cell (SC) were encapsulated in PVA-Tyr crosslinked with gelatin and sericin. Specifically, this study aimed to examine the growth and function of SC and PC12 co-cultures when translated from a two dimensional (2D) environment to a 3D environment. PC12 differentiation was successfully promoted in both 2D and 3D at 25 days post-culture. SC encapsulated as a single cell line and in co-culture were able to produce both laminin and collagen-IV which are required to support neuronal development. Neurite outgrowth in the 3D environment was confirmed by immunocytochemical staining. PVA-Tyr/sericin/gelatin hydrogel showed mechanical properties similar to nerve tissue elastic modulus. It is suggested that the mechanical properties of the PVA-Tyr hydrogels with native protein components are providing with a compliant substrate that can be used to support the survival and differentiation of neural networks. PMID:26736824

  18. A bridge between unified cosmic history by f( R)-gravity and BIonic system

    Science.gov (United States)

    Sepehri, Alireza; Capozziello, Salvatore; Setare, Mohammad Reza

    2016-04-01

    Recently, the cosmological deceleration-acceleration transition redshift in f( R) gravity has been considered in order to address consistently the problem of cosmic evolution. It is possible to show that the deceleration parameter changes sign at a given redshift according to observational data. Furthermore, a f( R) gravity cosmological model can be constructed in brane-antibrane system starting from the very early universe and accounting for the cosmological redshift at all phases of cosmic history, from inflation to late time acceleration. Here we propose a f( R) model where transition redshifts correspond to inflation-deceleration and deceleration-late time acceleration transitions starting froma BIon system. At the point where the universe was born, due to the transition of k black fundamental strings to the BIon configuration, the redshift is approximately infinity and decreases with reducing temperature (z˜ T2). The BIon is a configuration in flat space of a universe-brane and a parallel anti-universe-brane connected by a wormhole. This wormhole is a channel for flowing energy from extra dimensions into our universe, occurring at inflation and decreasing with redshift as z˜ T^{4+1/7}. Dynamics consists with the fact that the wormhole misses its energy and vanishes as soon as inflation ends and deceleration begins. Approaching two universe branes together, a tachyon is originated, it grows up and causes the formation of a wormhole. We show that, in the framework of f( R) gravity, the cosmological redshift depends on the tachyonic potential and has a significant decrease at deceleration-late time acceleration transition point (z˜ T^{2/3}). As soon as today acceleration approaches, the redshift tends to zero and the cosmological model reduces to the standard Λ CDM cosmology.

  19. Bionics-Based Approach for Object Tracking to Implementin Robot Applications

    Directory of Open Access Journals (Sweden)

    Hussam K. Abdul-Ameer

    2010-01-01

    Full Text Available In this paper, an approach for object tracking that is inspired from human oculomotor system is proposed and verified experimentally. The developed approach divided into two phases, fast tracking or saccadic phase and smooth pursuit phase. In the first phase, the field of the view is segmented into four regions that are analogue to retinal periphery in the oculomotor system. When the object of interest is entering these regions, the developed vision system responds by changing the values of the pan and tilt angles to allow the object lies in the fovea area and then the second phase will activate. A fuzzy logic method is implemented in the saccadic phase as an intelligent decision maker to select the values of the pan and tilt angle based on suggested logical rules. In smooth pursuit phase, the object is kept in the center area of the field of the view by smooth adjusting the values of the pan and tilt angles where this stage is analogue to putting the observing object in the fovea centralis of the oculomotor system. The proposed approach was implemented by using (Camera-Pan / Tilt configuration and showed good results to improve the vision capability of the humanoid robots.

  20. Moving towards in situ tracheal regeneration: the bionic tissue engineered transplantation approach

    OpenAIRE

    Bader, Augustinus; Macchiarini, Paolo

    2010-01-01

    Abstract In June 2008, the world’s first whole tissue-engineered organ – the windpipe – was successfully transplanted into a 31-year-old lady, and about 18 months following surgery she is leading a near normal life without immunosuppression. This outcome has been achieved by employing three groundbreaking technologies of regenerative medicine: (i) a donor trachea first decellularized using a detergent (without denaturing the collagenous matrix), (ii) the two main autologous tracheal cells, na...