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Sample records for arm based soc

  1. ARM Soc Based Enotebook

    Directory of Open Access Journals (Sweden)

    Pranita C Bawankar

    2014-05-01

    Full Text Available In recent years, electronic media has grown very fast replacing papers, tape devices, books, etc. The new technologies provide large number of data into single device, fast searching options and more readability than ever. As eBooks are replacing books; we are proposing ENotebook system in which user can write as he did in notebook, save, searches and then reread content. This paper presents design and development of ENotebook using ARM7. The system uses touch screen to get input data and operations like save, delete, open & close of data file. All data sensed by touch screen is digitized by internal ADCs of LPC2148 microcontroller which gives low power platform with fast execution. The output is shown on graphical LCD. Whatever user writes on screen it may need to save for future use. The content of such hand written data will be in graphical/pictorial form hence required large of memory for storage. We can provide external memory using pen drive, memory card, EEPROM etc. in this system we are using SD card interfacing through SPI port.

  2. Ahb Compatible DDR Sdram Controller Ip Core for Arm Based Soc

    CERN Document Server

    Shashikumar, Dr R; Nagendrakumar, M; Hemanthkumar, C S

    2010-01-01

    DDR SDRAM is similar in function to the regular SDRAM but doubles the bandwidth of the memory by transferring data on both edges of the clock cycles. DDR SDRAM most commonly used in various embedded application like networking, image or video processing, Laptops ete. Now a days many applications needs more and more cheap and fast memory. Especially in the field of signal processing, requires significant amount of memory. The most used type of dynamic memory for that purpose is DDR SDRAM. For FPGA design the IC manufacturers are providing commercial memory controller IP cores working only on their products. Main disadvantage is the lack of memory access optimization for random memory access patterns. The data path part of those controllers can be used free of charge. This work propose an architecture of a DDR SDRAM controller, which takes advantage of those available and well tested data paths and can be used for any FPGA device or ASIC design.(5). In most of the SOC design, DDR SDRAM is commonly used. ARM pro...

  3. Co-verification of hardware and software for ARM SoC design

    CERN Document Server

    Andrews, Jason

    2004-01-01

    Hardware/software co-verification is how to make sure that embedded system software works correctly with the hardware, and that the hardware has been properly designed to run the software successfully -before large sums are spent on prototypes or manufacturing. This is the first book to apply this verification technique to the rapidly growing field of embedded systems-on-a-chip(SoC). As traditional embedded system design evolves into single-chip design, embedded engineers must be armed with the necessary information to make educated decisions about which tools and methodology to deploy. SoC verification requires a mix of expertise from the disciplines of microprocessor and computer architecture, logic design and simulation, and C and Assembly language embedded software. Until now, the relevant information on how it all fits together has not been available. Andrews, a recognized expert, provides in-depth information about how co-verification really works, how to be successful using it, and pitfalls to avoid. H...

  4. AMBA Based Advanced DMA Controller for SoC

    Directory of Open Access Journals (Sweden)

    Abdullah Aljumah

    2016-03-01

    Full Text Available this paper describes the implementation of an AMBA Based Advanced DMA Controller for SoC. It uses AMBA Specifications, where two buses AHB and APB are defined and works for processor as system bus and peripheral bus respectively. The DMA controller functions between these two buses as a bridge and allow them to work concurrently. Depending on the speed of peripherals it uses buffering mechanism. Therefore an asynchronous FIFO is used for synchronizing the speed of peripherals. The proposed DMA controller can works in SoC along with processor and achieve fast data rate. The method introduced significant volume of data transfer with very low timing characteristics. Thus it is a better choice in respect of timing and volume of data. These two issues have been resolved under this research study. The results are compared with the AMD processors, like Geode GX 466, GX 500 and GX 533, and the presence and absence of DMA controller with processor is discussed and compared. The DMAC stands to be better alternative in SoC design.

  5. The ZYNQ book embedded processing with the ARM Cortex-A9 on the Xilinx Zynq-7000 all programmable SoC

    CERN Document Server

    Crockett, Louise H; Enderwitz, Martin A; Stewart, Robert W

    2014-01-01

    This book is about the Zynq-7000 All Programmable System on Chip, the family of devices from Xilinx that combines an application-grade ARM Cortex-A9 processor with traditional FPGA logic fabric. Catering for both new and experienced readers, it covers fundamental issues in an accessible way, starting with a clear overview of the device architecture, and an introduction to the design tools and processes for developing a Zynq SoC. Later chapters progress to more advanced topics such as embedded systems development, IP block design and operating systems. Maintaining a 'real-world' perspective, the book also compares Zynq with other device alternatives, and considers end-user applications. The Zynq Book is accompanied by a set of practical tutorials hosted on a companion website. These tutorials will guide the reader through first steps with Zynq, following on to a complete, audio-based embedded systems design.

  6. Model based SOC estimation for high-power Li-ion battery packs used on FCHVs

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A model based method which recruited the extended Kalman filter (EKF) to estimate the full state of charge (SOC) of Li-ion battery was proposed. The underlying dynamic behavior of the cell pack was described based on an equivalent circuit comprising of two capacitors and three resistors. Measurements in two tests were applied to compare the SOC estimated by model based EKF estimation with the SOC calculated by coulomb counting. Results have shown that the proposed method is able to perform a good estimation of the SOC of battery packs. Moreover, a corresponding battery management systems (BMS) including software and hardware based on this method was designed.

  7. Perception SoC Based on an Ultrasonic Array of Sensors: Efficient DSP Core Implementation and Subsequent Experimental Results

    Directory of Open Access Journals (Sweden)

    A. Haidar

    2005-05-01

    Full Text Available We are concerned with the design, implementation, and validation of a perception SoC based on an ultrasonic array of sensors. The proposed SoC is dedicated to ultrasonic echography applications. A rapid prototyping platform is used to implement and validate the new architecture of the digital signal processing (DSP core. The proposed DSP core efficiently integrates all of the necessary ultrasonic B-mode processing modules. It includes digital beamforming, quadrature demodulation of RF signals, digital filtering, and envelope detection of the received signals. This system handles 128 scan lines and 6400 samples per scan line with a 90° angle of view span. The design uses a minimum size lookup memory to store the initial scan information. Rapid prototyping using an ARM/FPGA combination is used to validate the operation of the described system. This system offers significant advantages of portability and a rapid time to market.

  8. Research on SOC estimation based on second-order RC model

    Directory of Open Access Journals (Sweden)

    Xieyang Wang

    2012-11-01

    Full Text Available The estimation accuracy of batteries’ State of Charge (SOC plays an important role in the development of hybrid electric vehicle (HEV. Accurate estimation of SOC can prevent battery from overly charging and discharging, so the lifetime of batteries will be increased. Although Kalman filter algorithm has better estimation accuracy for HEV application in which the current changes fast, Kalman filter algorithm deeply relies on the battery model. In other words, the accuracy of batteries’ SOC estimation needs precise batteries models. Besides, when the HEV is running, the statistical characteristics of noise produced in the course of the battery management system collecting data are unknown. This can cause estimated performance of Kalman filter algorithm to decrease even diffuse. To solve the problem, adaptive Kalman filter algorithm is adopted to estimate battery SOC based on the second order RC battery model in this paper. Through MATLAB simulation analysis, the estimation accuracy of battery SOC is improved to some extent.

  9. SOC EKF Estimation based on a Second-order LiFePO4 Battery Model

    Directory of Open Access Journals (Sweden)

    Zheng Zhu

    2013-08-01

    Full Text Available An accurate battery State of Charge (SOC estimation has great significance in improving battery life and vehicle performance. An improved second-order battery model is proposed in this paper through quantities of LiFePO4 battery experiments. The parameters of the model were acquired by the HPPC composite pulse condition under different temperature, charging and discharging rates, SOC. Based on the model, battery SOC is estimated by Extended Kalman Filter (EKF. Comparison of three different pulse conditions shows that the average error of SOC estimation of this algorithm is about 4.2%. The improved model is able to reflect the dynamic performance of batteries suitably, and the SOC estimation algorithm is provided with higher accuracy and better dynamic adaptability.

  10. SOC Estimation of LiFePO4 Battery based on Improved Ah Integral Method

    Directory of Open Access Journals (Sweden)

    Zheng ZHU

    2013-07-01

    Full Text Available State of charge (SOC is the most important status parameters of energy storage system, which is able to predict the available mileage of electric vehicle. In fact, the accuracy of SOC estimation plays a vital role in the usability and security of the battery. To fully consider the practical demands, a novel method to predict SOC of LiFePO4 battery is presented in this paper, which defines the correct coefficient separately under two working conditions of charging and discharging. Based on effective factors such as coulombic efficiency, charge and discharge current, and temperature, an Ah integral SOC estimation method with two kinds of efficiency correct coefficients is established by performing massive experimental study. Experiments prove that the estimated error of SOC is less than 5%. Compared with the original Ah method, the improved Ah method is more advantageous in the accuracy and reliability.

  11. Optimal hardware/software co-synthesis for core-based SoC designs

    Institute of Scientific and Technical Information of China (English)

    Zhan Jinyu; Xiong Guangze

    2006-01-01

    A hardware/software co-synthesis method is presented for SoC designs consisting of both hardware IP cores and software components on a graph-theoretic formulation. Given a SoC integrated with a set of functions and a set of performance factors, a core for each function is selected from a set of alternative IP cores and software components, and optimal partitions is found in a way to evenly balance the performance factors and to ultimately reduce the overall cost, size, power consumption and runtime of the core-based SoC. The algorithm formulates IP cores and components into the corresponding mathematical models, presents a graph-theoretic model for finding the optimal partitions of SoC design and transforms SoC hardware/software co-synthesis problem into finding optimal paths in a weighted, directed graph. Overcoming the three main deficiencies of the traditional methods, this method can work automatically, evaluate more performance factors at the same time and meet the particularity of SoC designs.At last, the approach is illustrated that is practical and effective through partitioning a practical system.

  12. Design of SOC based on IP core%基于IP的系统芯片(SOC)设计

    Institute of Scientific and Technical Information of China (English)

    薛严冰; 徐晓轩

    2004-01-01

    随着集成电路设计与工艺技术水平的提高,出现了系统芯片(SOC)的概念.本文介绍了基于IP的SOC设计方式的设计流程,指出了其与传统IC设计方法的不同.讨论了支持SOC设计的几种关键技术,并对SOC的技术优势及发展趋势作了全面阐述.

  13. An OCP Compliant Network Adapter for GALS-based SoC Design Using the MANGO Network-on-Chip

    DEFF Research Database (Denmark)

    Bjerregaard, Tobias; Mahadevan, Shankar; Olsen, Rasmus Grøndahl

    2005-01-01

    decouples communication and computation, providing memory-mapped OCP transactions based on primitive message-passing services of the network. Also, it facilitates GALS-type systems, by adapting to the clockless network. This helps leverage a modular SoC design flow. We evaluate performance and cost of 0......The demand for IP reuse and system level scalability in System-on-Chip (SoC) designs is growing. Network-onchip (NoC) constitutes a viable solution space to emerging SoC design challenges. In this paper we describe an OCP compliant network adapter (NA) architecture for the MANGO NoC. The NA...

  14. Multiple MIPS 4Kc cores based interrupt controller design and its implementation on HDTV SoC platform

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A multiple MIPS 4Kc processor cores based interrupt processing system is introduced. The interrupt controller plays a key role in the high definition television (HDTV) system-on-a-chip (SoC) platform,especially when it is a multiple processor system. Based on a general introduction to the whole HDTV SoC platform, a layered interrupt controller and its implementation are discussed in detail. The proposed scheme was implemented in our FPGA verification board. The results indicate that our scheme is reliable and efficient. Meanwhile, as a functional intellectual property (IP), the interrupt controller has reusability and expandability with the layered structure.

  15. The inventory-based approach for prediction of SOC change following land use change

    Directory of Open Access Journals (Sweden)

    van Wesemael B.

    2004-01-01

    Full Text Available This paper describes and illustrates an approach to predict soil organic carbon (SOC change in time after land use change as derived from SOC differences in space. The approach requires the availability of a SOC inventory for spatially explicit combinations of soil and land use type, further termed landscape units (LSU. SOC of LSU with equal soil type but different land use type are compared and the observed differences in SOC are interpreted as the expected SOC change after the corresponding land use change. From a confrontation with time series of agro-statistical data on crop and grassland areas and on animal manure production, we conclude that the approach is a low-cost alternative for more complex methods like multitemporal assessments and modelling, provided that (i an inventory reflecting current management and climate conditions and (ii additional information on the extent and type of recent land use changes are available. Examples of land use and land management changes are discussed, such as grassland – cropland conversions, the conversion of permanent to temporary grassland, or changes in manure application.

  16. Comparison Study on Two Model-Based Adaptive Algorithms for SOC Estimation of Lithium-Ion Batteries in Electric Vehicles

    Directory of Open Access Journals (Sweden)

    Yong Tian

    2014-12-01

    Full Text Available State of charge (SOC estimation is essential to battery management systems in electric vehicles (EVs to ensure the safe operations of batteries and providing drivers with the remaining range of the EVs. A number of estimation algorithms have been developed to get an accurate SOC value because the SOC cannot be directly measured with sensors and is closely related to various factors, such as ambient temperature, current rate and battery aging. In this paper, two model-based adaptive algorithms, including the adaptive unscented Kalman filter (AUKF and adaptive slide mode observer (ASMO are applied and compared in terms of convergence behavior, tracking accuracy, computational cost and estimation robustness against parameter uncertainties of the battery model in SOC estimation. Two typical driving cycles, including the Dynamic Stress Test (DST and New European Driving Cycle (NEDC are applied to evaluate the performance of the two algorithms. Comparison results show that the AUKF has merits in convergence ability and tracking accuracy with an accurate battery model, while the ASMO has lower computational cost and better estimation robustness against parameter uncertainties of the battery model.

  17. Generic System Verilog Universal Verification Methodology Based Reusable Verification Environment for Efficient Verification of Image Signal Processing IPS/SOCS

    Directory of Open Access Journals (Sweden)

    Abhishek Jain

    2012-12-01

    Full Text Available In this paper, we present Generic System Verilog Universal Verification Methodology based Reusable Verification Environment for efficient verification of Image Signal Processing IP’s/SoC’s. With the tight schedules on all projects it is important to have a strong verification methodology which contributes to First Silicon Success. Deploy methodologies which enforce full functional coverage and verification of corner cases through pseudo random test scenarios is required. Also, standardization of verification flow is needed. Previously, inside imaging group of ST, Specman (e/Verilog based Verification Environment forIP/Subsystem level verification and C/C++/Verilog based Directed Verification Environment for SoC Level Verification was used for Functional Verification. Different Verification Environments were used at IP level and SoC level. Different Verification/Validation Methodologies were used for SoC Verification across multiple sites. Verification teams were also looking for the ways how to catch bugs early in the design cycle? Thus, Generic System Verilog Universal Verification Methodology (UVM based Reusable Verification Environment is required to avoid the problem of having so many methodologies and provides a standard unified solution which compiles on all tools.

  18. Highly monodisperse M III-based soc -MOFs (M = in and Ga) with cubic and truncated cubic morphologies

    KAUST Repository

    Pang, Maolin

    2012-08-15

    In this work, we carry out an investigation on shape-controlled growth of In III- and Ga III-based square-octahedral metal-organic frameworks (soc-MOFs). In particular, controllable crystal morphological evolution from simple cubes to complex octadecahedra has been achieved, and resultant highly uniform crystal building blocks promise new research opportunities for preparation of self-assembled MOF materials and related applications. © 2012 American Chemical Society.

  19. FPGA Implementation of Deblocking Filter Custom Instruction Hardware on NIOS - II Based SOC

    Directory of Open Access Journals (Sweden)

    Bolla Leela Naresh

    2011-12-01

    Full Text Available This paper presents a frame work for hardware acceleration for post video processing system implemented on FPGA. The deblocking filter algorithms ported on SOC having Alter a NIOS-II soft core processor.SOC designed with the help of SOPC builder .Custom instructions are chosen by identifying the most frequently used tasks in the algorithm and the instruction set of NIOS-II processor has been extended. Deblocking filter new instruction added to the processor that are implemented in hardware and interfaced to the NIOSII processor. New instruction added to the processor to boost the performance of the deblocking filter algorithm. Use of custom instructions the implemented tasks have been accelerated by 5.88%. The benefit of the speed is obtained at the cost of very small hardware resources.

  20. FPGA Implementation of Deblocking Filter Custom Instruction Hardware on NIOS - II Based SOC

    Directory of Open Access Journals (Sweden)

    Addanki Purna Ramesh

    2012-01-01

    Full Text Available This paper presents a frame work for hardware acceleration for post video processing system implemented on FPGA. The deblocking filter algorithms ported on SOC having Altera NIOS-II soft core processor.SOC designed with the help of SOPC builder .Custom instructions are chosen by identifying the most frequently used tasks in the algorithm and the instruction set of NIOS-II processor has been extended. Deblockingfilter new instruction added to the processor that are implemented in hardware and interfaced to the NIOSII processor. New instruction added to the processor to boost the performance of the deblocking filteralgorithm. Use of custom instructions the implemented tasks have been accelerated by 5.88%. The benefit of the speed is obtained at the cost of very small hardware resources.

  1. MOF Crystal Chemistry Paving the Way to Gas Storage Needs: Aluminum Based soc-MOF for CH4, O2 and CO2 Storage

    KAUST Repository

    Alezi, Dalal

    2015-09-28

    The molecular building block approach was employed effectively to construct a series of novel isoreticular, highly porous and stable, aluminum based Metal-Organic Frameworks with soc topology. From this platform, three compounds were experimentally isolated and fully characterized, namely, the parent Al-soc-MOF-1 and its naphthalene and anthracene analogues. Al-soc-MOF-1 exhibits outstanding gravimetric methane uptake (total and working capacity). It is shown experimentally, for the first time, that the Al-soc-MOF platform can address the challenging Department of Energy dual target of 0.5 g/g (gravimetric) and 264 cm3 (STP)/cm3 (volumetric) methane storage. Furthermore, Al-soc-MOF exhibited the highest total gravimetric and volumetric uptake for carbon dioxide and the utmost total and deliverable uptake for oxygen at relatively high pressures among all microporous MOFs. In order to correlate the MOF pore structure and functionality to the gas storage properties, to better understand the structure-properties relationship, we performed a molecular simulation study and evaluated the methane storage performance of Al-soc-MOF platform using diverse organic linkers. It was found that shortening the parent Al-soc-MOF-1 linker resulted in a noticeable enhancement in the working volumetric capacity at specific temperatures and pressures with amply conserved gravimetric uptake/working capacity. In contrast, further expansion of the organic linker (branches and/or core) led to isostructural Al-soc-MOFs with enhanced gravimetric uptake but noticeably lower volumetric capacity. The collective experimental and simulation studies indicated that the parent Al-soc-MOF-1 exhibits the best compromise between the volumetric and gravimetric total and working uptakes in a wide range of pressure and temperature conditions.

  2. MOF Crystal Chemistry Paving the Way to Gas Storage Needs: Aluminum-Based soc-MOF for CH4, O2, and CO2 Storage.

    Science.gov (United States)

    Alezi, Dalal; Belmabkhout, Youssef; Suyetin, Mikhail; Bhatt, Prashant M; Weseliński, Łukasz J; Solovyeva, Vera; Adil, Karim; Spanopoulos, Ioannis; Trikalitis, Pantelis N; Emwas, Abdul-Hamid; Eddaoudi, Mohamed

    2015-10-21

    The molecular building block approach was employed effectively to construct a series of novel isoreticular, highly porous and stable, aluminum-based metal-organic frameworks with soc topology. From this platform, three compounds were experimentally isolated and fully characterized: namely, the parent Al-soc-MOF-1 and its naphthalene and anthracene analogues. Al-soc-MOF-1 exhibits outstanding gravimetric methane uptake (total and working capacity). It is shown experimentally, for the first time, that the Al-soc-MOF platform can address the challenging Department of Energy dual target of 0.5 g/g (gravimetric) and 264 cm(3) (STP)/cm(3) (volumetric) methane storage. Furthermore, Al-soc-MOF exhibited the highest total gravimetric and volumetric uptake for carbon dioxide and the utmost total and deliverable uptake for oxygen at relatively high pressures among all microporous MOFs. In order to correlate the MOF pore structure and functionality to the gas storage properties, to better understand the structure-property relationship, we performed a molecular simulation study and evaluated the methane storage performance of the Al-soc-MOF platform using diverse organic linkers. It was found that shortening the parent Al-soc-MOF-1 linker resulted in a noticeable enhancement in the working volumetric capacity at specific temperatures and pressures with amply conserved gravimetric uptake/working capacity. In contrast, further expansion of the organic linker (branches and/or core) led to isostructural Al-soc-MOFs with enhanced gravimetric uptake but noticeably lower volumetric capacity. The collective experimental and simulation studies indicated that the parent Al-soc-MOF-1 exhibits the best compromise between the volumetric and gravimetric total and working uptakes under a wide range of pressure and temperature conditions.

  3. Reconstruction of an active SOCS3-based E3 ubiquitin ligase complex in vitro: identification of the active components and JAK2 and gp130 as substrates.

    Science.gov (United States)

    Kershaw, Nadia J; Laktyushin, Artem; Nicola, Nicos A; Babon, Jeffrey J

    2014-02-01

    SOCS3 (suppressor of cytokine signaling 3) inhibits the intracellular signaling cascade initiated by exposure of cells to cytokines. SOCS3 regulates signaling via two distinct mechanisms: directly inhibiting the catalytic activity of Janus kinases (JAKs) that initiate the intracellular signaling cascade and catalysing the ubiquitination of signaling components by recruiting components of an E3 ubiquitin ligase complex. Here we investigate the latter mode-of-action biochemically by reconstructing a SOCS3-based E3 ubiquitin ligase complex in vitro using fully purified, recombinant components and examining its ability to promote the ubiquitination of molecules involved in the cytokine signaling cascade. We show that SOCS3 is an active substrate recruitment module for a Cullin5-based E3 ligase and have defined the core protein components required for ubiquitination. SOCS3-induced polyubiquitination was rapid and could proceed through a number of different ubiquitin lysines. SOCS3 catalyzed the ubiquitination of both the IL-6 receptor common chain (gp130) and JAK2.

  4. SOCS, inflammation and autoimmunity

    Directory of Open Access Journals (Sweden)

    Akihiko eYoshimura

    2012-03-01

    Full Text Available Cytokines play essential roles in innate and adaptive immunity. However, excess cytokines or dysregulation of cytokine signaling can cause a variety of diseases, including allergies, autoimmune diseases, inflammation, and cancer. Most cytokines utilize the so-called Janus kinase-signal transducers and activators of transcription (JAK-STAT pathway. This pathway is negatively regulated by various mechanisms including suppressors of cytokine signaling (SOCS proteins. SOCS proteins bind to JAK or cytokine receptors, thereby suppressing further signaling events. Especially, SOCS1 and SOCS3 are strong inhibitors of JAK, because these two contain kinase inhibitory region (KIR at the N-terminus. Studies using conditional knockout mice have shown that SOCS proteins are key physiological as well as pathological regulators of immune homeostasis. Recent studies have also demonstrated that SOCS1 and SOCS3 are important regulators of helper T cell differentiation and functions.

  5. [A wireless ECG monitor based on ARM].

    Science.gov (United States)

    Fan, Ai-Hua; Bian, Chun-Hua; Ning, Xin-Bao; He, Ai-Jun; Zhuang, Jian-Jun; Wu, Xu-Hui

    2008-11-01

    This paper presents a novel monitor which uses ARM controller AT91SAM7S64 as its main processor, LCM (Liquid Crystal Display Module) for displaying ECG waves, SD (Secure Digital memory) card for data storage and RF module PTR8000 for radio data transmission. This portable monitor boasts alarm function for abnormality and can provide dynamic ECG monitoring for patients.

  6. A software radio platform based on ARM and FPGA

    Directory of Open Access Journals (Sweden)

    Yang Xin.

    2016-01-01

    Full Text Available The rapid rise in computational performance offered by computer systems has greatly increased the number of practical software radio applications. A scheme presented in this paper is a software radio platform based on ARM and FPGA. FPGA works as the coprocessor together with the ARM, which serves as the core processor. ARM is used for digital signal processing and real-time data transmission, and FPGA is used for synchronous timing control and serial-parallel conversion. A SPI driver for real-time data transmission between ARM and FPGA under ARM-Linux system is provided. By adopting modular design, the software radio platform is capable of implementing wireless communication functions and satisfies the requirements of real-time signal processing platform for high security and broad applicability.

  7. ARM 7 BASED MP3 PLAYER

    Directory of Open Access Journals (Sweden)

    Ashiq V Mehta

    2014-02-01

    Full Text Available MP3 is a patented encoding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. Since the MPEG-1 Layer III encoding technology is nowadays widely used it might be interesting to gain knowledge of how this powerful compression/decompression scheme actually functions. The MPEG-1 Layer III is capable of reducing the bit rate with a factor of 12 without almost any audible degradation. Arm7 lpc2148 is arm7tdmi-s core board microcontroller that uses 16/32-bit 64 pin (lqfp microcontroller no.lpc2148 from Philips (nxp.The hardware system of lpc2148 includes the necessary devices within only one mcu has such as usb, adc, dac, timer/counter, pwm, capture, i2c, spi, uart, and etc.

  8. Ad-hoc Network Based on ARM-Linux%基于ARM-Linux的Ad-hoc组网

    Institute of Scientific and Technical Information of China (English)

    王晓华; 贾继洋

    2014-01-01

    Aiming to solve the problem of the contemporary communication system in the absence of any network, a new scheme of the Ad-hoc network based on ARM-Linux system is designed. Firstly, this paper introduces the transportation of the Linux2.6.36 and the driver of RT3070 on ARM11 platform. Then based on socket programming in TCP/IP, program designing of communication and tests are conducted on the ARM-Linux platform. Results have proved that the Ad-hoc network can use the least resources and costs to achieve reliable high rate communication. It is significant for practical application.%针对传统通信系统不能满足在无任何网络情况下的通信需求现状,设计并实现了一种由 ARM-Linux 系统及其外围部件组成的无线自组网(Ad-hoc)的通信方案.在 ARM11平台上完成了 Linux2.6.36操作系统和RT3070无线通信模块的驱动程序移植.利用基于TCP/IP协议的socket编程,编写测试程序,进行节点间无线通信传输实验.实验结果表明:本文搭建的Ad-hoc网络,可以用最少的资源和成本,实现节点间可靠的无线高速率通信,具有现实应用意义.

  9. Reusable AVS decoder SOC architecture design based on software-hardware co-design%可重用AVS芯片结构软硬件协同设计

    Institute of Scientific and Technical Information of China (English)

    王忠平; 祝永新; 郭炜

    2008-01-01

    根据软硬件设计思想设计一个结构划分合理的可重用的AVS视频解码器结构.通过ARM平台软件移植,然后使用ARM ESL工具对系统模块性能进行整体评估,然后根据评估结果以及硬件实现复杂度进行软硬件结构的划分,定制软硬件模块接口,从硬件扩展考虑把硬件部分设计为与H.264解码器兼容并用SystemC模拟,最后在SOC Designer 平台做协同验证及仿真.

  10. Design and Development of ARM9 Based Embedded Web Server

    Directory of Open Access Journals (Sweden)

    Niturkar Priyanka

    2015-08-01

    Full Text Available This paper describes the design of embedded web server based on ARM9 processor and Linux platform. It analyses hardware configuration and software implementation for monitoring and controlling systems or devices. User can monitor and control temperature and smoke information. It consists of application program written in „C‟ for accessing data through the serial port and updating the web page, porting of Linux 2.6.3x Kernel with application program on ARM9 board and booting it from the RAM.

  11. Gesture Recognition Based on the Probability Distribution of Arm Trajectories

    Science.gov (United States)

    Wan, Khairunizam; Sawada, Hideyuki

    The use of human motions for the interaction between humans and computers is becoming an attractive alternative to verbal media, especially through the visual interpretation of the human body motion. In particular, hand gestures are used as non-verbal media for the humans to communicate with machines that pertain to the use of the human gestures to interact with them. This paper introduces a 3D motion measurement of the human upper body for the purpose of the gesture recognition, which is based on the probability distribution of arm trajectories. In this study, by examining the characteristics of the arm trajectories given by a signer, motion features are selected and classified by using a fuzzy technique. Experimental results show that the use of the features extracted from arm trajectories effectively works on the recognition of dynamic gestures of a human, and gives a good performance to classify various gesture patterns.

  12. A Parallax-based Distance Estimator for Spiral Arm Sources

    CERN Document Server

    Reid, M J; Menten, K M; Brunthaler, A

    2016-01-01

    The spiral arms of the Milky Way are being accurately located for the first time via trigonometric parallaxes of massive star forming regions with the BeSSeL Survey, using the Very Long Baseline Array and the European VLBI Network, and with the Japanese VERA project. Here we describe a computer program that leverages these results to significantly improve the accuracy and reliability of distance estimates to other sources that are known to follow spiral structure. Using a Bayesian approach, sources are assigned to arms based on their (l,b,v) coordinates with respect to arm signatures seen in CO and HI surveys. A source's kinematic distance, displacement from the plane, and proximity to individual parallax sources are also considered in generating a full distance probability density function. Using this program to estimate distances to large numbers of star forming regions, we generate a realistic visualization of the Milky Way's spiral structure as seen from the northern hemisphere.

  13. 基于覆盖率驱动的SoC验证技术研究%Research of SoC Verification Technology Based on Coverage--Driven

    Institute of Scientific and Technical Information of China (English)

    朱车壮; 陈岚; 冯燕

    2011-01-01

    Coverage data--base is the qualitative measurement for the verification engineer to judge the complete degree of SoC verification, and it provides the safeguard for the SoC validation completeness. This paper takes the verification of SoC bus arbiter as an example, analyzes many kinds of coverage in detail, for example, structure coverage, functional coverage, assertion coverage and so on, then modifies the RTL design code and testcases based on the analysis results of these coverage, until the integrity of the verification meet the design requirements.%覆盖率数据是验证工程师判定SoC验证完备程度的定性度量,为SoC验证完全性提供了保障,指明了方向.文中以SoC总线仲裁器验证为例,对其结构覆盖率、功能覆盖率、断言覆盖率等多种覆盖率进行了全面的分析,然后根据覆盖率分析结果反馈到RTL设计代码和测试激励进行修正,直到验证的完整性满足设计的要求.

  14. Autonomous sensor-based dual-arm satellite grappling

    Science.gov (United States)

    Wilcox, Brian; Tso, Kam; Litwin, Todd; Hayati, Samad; Bon, Bruce

    1989-01-01

    Dual-arm satellite grappling involves the integration of technologies developed in the Sensing and Perception (S&P) Subsystem for object acquisition and tracking, and the Manipulator Control and Mechanization (MCM) Subsystem for dual-arm control. S&P acquires and tracks the position, orientation, velocity, and angular velocity of a slowly spinning satellite, and sends tracking data to the MCM subsystem. MCM grapples the satellite and brings it to rest, controlling the arms so that no excessive forces or torques are exerted on the satellite or arms. A 350-pound satellite mockup which can spin freely on a gimbal for several minutes, closely simulating the dynamics of a real satellite is demonstrated. The satellite mockup is fitted with a panel under which may be mounted various elements such as line replacement modules and electrical connectors that will be used to demonstrate servicing tasks once the satellite is docked. The subsystems are housed in three MicroVAX II microcomputers. The hardware of the S&P Subsystem includes CCD cameras, video digitizers, frame buffers, IMFEX (a custom pipelined video processor), a time-code generator with millisecond precision, and a MicroVAX II computer. Its software is written in Pascal and is based on a locally written vision software library. The hardware of the MCM Subsystem includes PUMA 560 robot arms, Lord force/torque sensors, two MicroVAX II computers, and unimation pneumatic parallel grippers. Its software is written in C, and is based on a robot language called RCCL. The two subsystems are described and test results on the grappling of the satellite mockup with rotational rates of up to 2 rpm are provided.

  15. Photoelectric radar servo control system based on ARM+FPGA

    Science.gov (United States)

    Wu, Kaixuan; Zhang, Yue; Li, Yeqiu; Dai, Qin; Yao, Jun

    2016-01-01

    In order to get smaller, faster, and more responsive requirements of the photoelectric radar servo control system. We propose a set of core ARM + FPGA architecture servo controller. Parallel processing capability of FPGA to be used for the encoder feedback data, PWM carrier modulation, A, B code decoding processing and so on; Utilizing the advantage of imaging design in ARM Embedded systems achieves high-speed implementation of the PID algorithm. After the actual experiment, the closed-loop speed of response of the system cycles up to 2000 times/s, in the case of excellent precision turntable shaft, using a PID algorithm to achieve the servo position control with the accuracy of + -1 encoder input code. Firstly, This article carry on in-depth study of the embedded servo control system hardware to determine the ARM and FPGA chip as the main chip with systems based on a pre-measured target required to achieve performance requirements, this article based on ARM chip used Samsung S3C2440 chip of ARM7 architecture , the FPGA chip is chosen xilinx's XC3S400 . ARM and FPGA communicate by using SPI bus, the advantage of using SPI bus is saving a lot of pins for easy system upgrades required thereafter. The system gets the speed datas through the photoelectric-encoder that transports the datas to the FPGA, Then the system transmits the datas through the FPGA to ARM, transforms speed datas into the corresponding position and velocity data in a timely manner, prepares the corresponding PWM wave to control motor rotation by making comparison between the position data and the velocity data setted in advance . According to the system requirements to draw the schematics of the photoelectric radar servo control system and PCB board to produce specially. Secondly, using PID algorithm to control the servo system, the datas of speed obtained from photoelectric-encoder is calculated position data and speed data via high-speed digital PID algorithm and coordinate models. Finally, a

  16. 基于CK-CORE处理器的导航SoC设计%Design on Navigation SoC Based on CK-CORE Processor

    Institute of Scientific and Technical Information of China (English)

    沈贵元; 李斌; 王铁英

    2014-01-01

    基于我国自主知识产权的CK-CORE处理器,设计了一款可满足GPS/北斗双模导航定位应用的导航SoC芯片。该芯片采用了一种结合码相位并行和频域并行的捕获算法,并且使用经典的延迟锁定环路( DLL)、频率锁定环路( FLL)和相位锁定环路( PLL)相结合的方法来实现码相位的跟踪以及载波的跟踪。进行芯片测试表明, SoC芯片定位水平误差小于10 m,灵敏度小于-145 dBm,冷启动时间小于48 s。%Based on the CK-CORE processor with Chinese independent intellectual property, the navigation SoC is designed, which can meet the demand of navigation in both GPS and BD mode.The navigation SoC adopts the acquisition algorithm which com-bines code phase parallel and frequency domain parallel.It uses the classical delay locked loop (DLL),frequency locked loop (FLL) and phase locking loop (PLL) to realize the code phase tracking and carrier tracking.The SoC test results shows that the error of SoC in navigation is less than 10 meters,the sensitivity is less than -145 dBm and the time of its cold start is less than 48 seconds.

  17. Research on optimal power allocation strategy based on SOC state feedback in hybrid energy storage system%基于 SOC 状态反馈的混合储能功率优化策略

    Institute of Scientific and Technical Information of China (English)

    孙纯军; 倪春花; 窦晓波

    2016-01-01

    文中储能系统功率优化分配以一阶惯性滤波系统为基础,介绍了滤波系数的确定方法,首先提出了基于频谱分析的混合储能系统功率分配方法,根据频谱分析结果,确定波动功率在蓄电池与超级电容之间的分配;在频谱分析的基础上,进一步提出了基于SOC状态反馈的混合储能系统功率优化分配方法,并采用模糊控制,根据储能系统荷电状态SOC的值实时调整系统的滤波时间参数,从而实现超级电容-蓄电池储能系统的长期有效运行。最后,在PSCAD/EMTDC中搭建微电网仿真模型,并设计仿真方案,通过仿真验证所提混合储能系统功率优化分配策略的有效性。%Energy storage system has an important significance for reliable and stable operation of micro-grids.Con-sidering the lack of single form of energy storage, ultra-capacitor-battery hybrid energy storage system is used in this paper.Strategies of power distribution of energy storage system are based on first order inertial filter system, and the method to determine the filter coefficients are introduced.Firstly, a method based on spectrum analysis is proposed to distribute the fluctuated power between the battery and ultra-capacitor.Next, a power distribution strategy of hybrid energy storage system based on SOC feedback is proposed.And fuzzy control method is adopted to adjust system pa-rameters in real time according to the state of charge of the storage system, thus achieving the long term operation of hybrid energy storage system.Finally, the models are built in PSCAD /EMTDC to verify the effectiveness of the pow-er distribution strategies through simulation according to the designed projects.

  18. Structural Optimization of Slender Robot Arm Based on Sensitivity Analysis

    Directory of Open Access Journals (Sweden)

    Zhong Luo

    2012-01-01

    Full Text Available An effective structural optimization method based on a sensitivity analysis is proposed to optimize the variable section of a slender robot arm. The structure mechanism and the operating principle of a polishing robot are introduced firstly, and its stiffness model is established. Then, a design of sensitivity analysis method and a sequential linear programming (SLP strategy are developed. At the beginning of the optimization, the design sensitivity analysis method is applied to select the sensitive design variables which can make the optimized results more efficient and accurate. In addition, it can also be used to determine the scale of moving step which will improve the convergency during the optimization process. The design sensitivities are calculated using the finite difference method. The search for the final optimal structure is performed using the SLP method. Simulation results show that the proposed structure optimization method is effective in enhancing the stiffness of the robot arm regardless of the robot arm suffering either a constant force or variable forces.

  19. A Parallax-based Distance Estimator for Spiral Arm Sources

    Science.gov (United States)

    Reid, M. J.; Dame, T. M.; Menten, K. M.; Brunthaler, A.

    2016-06-01

    The spiral arms of the Milky Way are being accurately located for the first time via trigonometric parallaxes of massive star-forming regions with the Bar and Spiral Structure Legacy Survey, using the Very Long Baseline Array and the European VLBI Network, and with the Japanese VLBI Exploration of Radio Astrometry project. Here we describe a computer program that leverages these results to significantly improve the accuracy and reliability of distance estimates to other sources that are known to follow spiral structure. Using a Bayesian approach, sources are assigned to arms based on their (l, b, v) coordinates with respect to arm signatures seen in CO and H i surveys. A source's kinematic distance, displacement from the plane, and proximity to individual parallax sources are also considered in generating a full distance probability density function. Using this program to estimate distances to large numbers of star-forming regions, we generate a realistic visualization of the Milky Way's spiral structure as seen from the northern hemisphere.

  20. 基于ARM9的RTU设计%Design of RTU based on ARM9

    Institute of Scientific and Technical Information of China (English)

    陈梓馥; 孙万蓉; 董明明; 杨波; 杨子峰; 贾海龙

    2012-01-01

    A newly universal design scheme of RTU is introduced, which is applied to signal acquisition and equipment control on industrial scene. It introduces the design of RTU which is based on ARM9 processor and with real-time operating system I.tC/ OS_II inside. The Modbus communication protocol in data transmitting and hardware function modules are also described. The hardware function modules mainly consist of eight digital input, eight digital output, eight analog input, RS232 communication, RS485 communication and Ethernet interface modules, etc. The design of slave RTU is also mentioned, which has much advantages in the capacity of storage, computing, programming, developing and networking over the ordinary ones.%提出了一种面向工业现场信号采集和对现场设备控制的新型通用一体~'LRTU的设计方案。介绍了基于ARM9处理器并采用uC/OS—II实时操作系统的I汀u系统设计方法,同时对数据传输采用的Modbus通信协议和硬件功能模块的设计进行了描述。硬件功能模块主要包括8路数字量输入、8路数字量输出、8路模拟量输入、RS232通信、RS485通信和以太网通信等模块。文中还提出了从站RTu的软件设计方法。与普通RTU相比,该方法具有更大的存储容量,更强的计算功能,更简便的编程与开发能力和强大的通信组网能力。

  1. Development of the Embedded Protective Device Based on ARM

    Institute of Scientific and Technical Information of China (English)

    LIU Xiao-wen; LI Na; PAN Chun-de

    2005-01-01

    An embedded protective device for 35kV power line is worked out based on Philips' LPC2292 ARM MCU. Several aspects such as embedded design technique adopted in the system framework, application of adaptive theory in data acquisition, Board Support Packet (BSP) developing and task dispatching related to operating system are discussed. Both hardware and software framework of the system are given. Advanced hardware platform and software development environment is applied in design of the system, with the advanced co-design technology.

  2. ARM Processor Based Embedded System for Remote Data Acquisition

    Directory of Open Access Journals (Sweden)

    Raj Kumar Tiwari

    2014-01-01

    Full Text Available The embedded systems are widely used for the data acquisition. The data acquired may be used for monitoring various activity of the system or it can be used to control the parts of the system. Accessing various signals with remote location has greater advantage for multisite operation or unmanned systems. The remote data acquisition used in this paper is based on ARM processor. The Cortex M3 processor used in this system has in-built Ethernet controller which facilitate to acquire the remote data using internet. The system developed provides high performance, low power consumption, smaller size {&} high speed

  3. A car theft deterrent system research based on ARM9

    Science.gov (United States)

    Zhang, Kaisheng; Liu, Jinhao; Fan, Lijun

    2009-07-01

    The traditional automotive burglarproof systems commonly only rely on the simple remote control to security which measures are not perfect and functions are too single. With the development of society, people tend to concern on the fingerprint recognition technology, GSM /GPRS wireless transmission technology, the idea of ARM9-based design of automobile burglarproof system is dependent on both of them. The S3C2410 microprocessor embedded system is used in this system, which is illuminated the idea of the control system design through the hardware and software. The spot use indicates that the high control precision, steady performance and the humanistic rational design of automotive burglarproof system.

  4. Research on object-oriented SOC design methodology

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    The growing complexity of System on Chip (SOC) requires a system level specification and design approach. High-level languages such as C+ +/SystemC can play multiple roles in system design as target languages. There are many practical problems in the application of object-oriented methods for this goal. Based on the analysis of traditional and system-level design methodology, a new object-oriented SOC design methodology with object-oriented design patterns is proposed, which emphasizes high-level design and verification. Aiming at the final goal of developing design patterns specific to SOC design, the reuse of design patterns in SOC systems and the capability of new SOC design patterns are discussed. With the illustration of some concrete examples of SOC design patterns, the application of object-oriented design methodology in the SOC design process is presented.

  5. Simulation of Octopus Arm Based on Coupled CPGs

    OpenAIRE

    Juan Tian; Qiang Lu

    2015-01-01

    The octopus arm has attracted many researchers’ interests and became a research hot spot because of its amazing features. Several dynamic models inspired by an octopus arm are presented to realize the structure with a large number of degrees of freedom. The octopus arm is made of a soft material introducing high-dimensionality, nonlinearity, and elasticity, which makes the octopus arm difficult to control. In this paper, three coupled central pattern generators (CPGs) are built and a 2-dimens...

  6. VFI-based Robotic Arm Control for Natural Adaptive Motion

    Directory of Open Access Journals (Sweden)

    Woosung Yang

    2014-03-01

    Full Text Available Since neural oscillator based control methods can generate rhythmic motion without information on system dynamics, they can be a promising alternative to traditional motion planning based control approaches. However, for field application, they still need to be robust against unexpected forces or changes in environments so as to be able to generate “natural motion” like most biological systems. In this study a biologically inspired control algorithm that combines neural oscillators and virtual force is proposed. This work gives the condition with respect to parameters tuning to stably activate the neural oscillators. This is helpful to achieve motion adaptability to environmental changes keeping the motion repeatability. He efficacy and efficiency of the proposed methods are tested in the control of a planar three-linkage robotic arm. It is shown that the proposed controller generates a given circular path stably and repeatedly, even with unexpected contact with a wall. The adaptivity of motion control is also tested in control of a robotic arm with redundant degrees of freedom. The proposed control algorithm works throughout the simulations and experiments.

  7. 基于 SPEA-II 算法的 SoC 测试多目标优化研究%Optimization of SoC test multiple objects based on SPEA-II agorithm

    Institute of Scientific and Technical Information of China (English)

    谈恩民; 朱峰; 尚玉玲

    2015-01-01

    测试功耗、测试时间是SoC测试优化中的两个测试目标,它们之间存在相互影响的关系。在多目标优化过程中,进化算法对于解决多目标优化问题拥有比较好的优化效果,因此各种进化算法被广泛地应用于SoC测试多目标优化的研究中。对SoC测试时间、测试功耗这两个测试目标建立联合优化模型,分析了NSGA‐II算法与SPEA‐II算法的特点,并对改进型强度Pareto进化算法(SPEA‐Ⅱ)进行研究,进而将SPEA‐II算法用于上述所建立模型的求解。使用ITC’02标准电路中p93791电路和d695电路对上述方法进行实验验证,实验数据表明上述方法可以求得该联合优化模型的一组最优解;并且针对p93791电路,在与NSGA‐II算法的实验数据比较中,得到了更好的优化结果。证明了SPEA‐II算法对SoC测试结构优化方面具有良好的适用性和可行性。%In the system chip SoC test optimization ,test power and test time are the two test target ,they exist interaction relations .In the process of multi‐objective optimization ,evolutionary algorithm for solving multi‐objective optimization problem has good effect ,so various evolutionary algorithms are widely used in SoC test in the study of multi‐objective op‐timization .In the absence of SoC test time or test pow er consumption as the constraint conditions under the premise of the SoC test time and test power joint optimization model of the these two goals .And the improved Strength Pareto Evo‐lutionary Algorithm (SPEA‐II) is studied ,which will SPEA‐II Algorithm used for the solution of the model established . Use the ITC’02 standard p93791 circuit and d695 in the circuit of the above methods to experimental verification ,the re‐sults show that the method can equilibrium solution is provided for the established joint optimization model .And in view of the p93791 circuit ,in the experimental data with the NSGA

  8. Arm7 Based Evolution in Vehicle Mobility and Automation

    Directory of Open Access Journals (Sweden)

    Mr. N. S. Vaidya

    2013-09-01

    Full Text Available The “Arm7 Based Evolution In Vehicle Mobility And Automation”, various sensor is used to detect various parameters of the vehicle system like Temperature sensor is used to detect engine temperature, Light sensor is used to switch on head light at night automatically, proximity sensor are used for driver as well as driver side seat belt wearing information, figure print sensor are used to open the vehicle as well as start the car. Micro serial data card reader is used here to work as a black box of the vehicle, whenever accident happen it can give all the last information which is stored in to memory card to the investigator, which is easy to detect the cause of accident. The smartness of this vehicle is to tell all the information or sensor output data audibly to the vehicle owner or driver and driver side seat passenger. All the things can be controlled by one system which is ARM7 and information is also displayed on LCD monitor

  9. Development of Status Monitoring Agent System Based on the ARM9 and Linux System%基于ARM9和Linux系统的状态监测代理系统开发

    Institute of Scientific and Technical Information of China (English)

    韩卫东

    2013-01-01

    介绍了ARM嵌入式微处理器的特点和应用,并对嵌入式片上系统(SOC)技术进行了简单分析;重点阐述了基于ARM9核的SOC片上系统AtmelSAM9260的输电线路状态监测代理系统的硬件平台和软件系统设计.实现了在一个局部范围内管理和协同各类输电线路状态监测装置,并代替各类装置与主站系统进行安全的双向有线和无线GPRS数据通信,同时满足不同厂家、不同类型的甚至不同线路的一组监测装置的标准化、智能化、安全化接入.为科学规范的建设坚强智能电网输电线路状态监测系统打下基础.%The paper introduces the characteristics of the embedded ARM microprocessor and its application,and gives simple analysis of embedded chip system (SOC) technology.It mainly describes the hardware platform of transmission line state monitoring agent system based on ARM9 core SOC chip system AtmelSAM9260 t and the design of software system.The state monitoring device is managed in a local scope and is coordinated with all kinds of transmission lines,and it replaces all kinds of safety two-way cable and wireless GPRS data communication between various devices and master station system,At the same time,it is able to make standard,intelligent and secure access of a group of monitoring devices with different manufacturers,with different types or with even different line.This will lay the foundation for the construction of state monitoring system of intelligent power grid transmission line.

  10. Simulation of Octopus Arm Based on Coupled CPGs

    Directory of Open Access Journals (Sweden)

    Juan Tian

    2015-01-01

    Full Text Available The octopus arm has attracted many researchers’ interests and became a research hot spot because of its amazing features. Several dynamic models inspired by an octopus arm are presented to realize the structure with a large number of degrees of freedom. The octopus arm is made of a soft material introducing high-dimensionality, nonlinearity, and elasticity, which makes the octopus arm difficult to control. In this paper, three coupled central pattern generators (CPGs are built and a 2-dimensional dynamic model of the octopus arm is presented to explore possible strategies of the octopus movement control. And the CPGs’ signals treated as activation are added on the ventral, dorsal, and transversal sides, respectively. The effects of the octopus arm are discussed when the parameters of the CPGs are changed. Simulations show that the octopus arm movements are mainly determined by the shapes of three CPGs’ phase diagrams. Therefore, some locomotion modes are supposed to be embedded in the neuromuscular system of the octopus arm. And the octopus arm movements can be achieved by modulating the parameters of the CPGs. The results are beneficial for researchers to understand the octopus movement further.

  11. 基于IEEE Std 1500标准的SOC可测性设计研究%Research of DFT of SOC based on IEEE Std 1500

    Institute of Scientific and Technical Information of China (English)

    周银; 周浔; 陈圣俭; 王月芳

    2012-01-01

    he technology of IP core based on SOC design is widely used, which is attribute to the rapid development of deep submicron meter manufacture technology and design technology of integrated circuit. Because of the fact that IP cores usually come from different providers and the incompatibility of interface between IP core providers and core users and aims at improving ease of test reuse and test integration with respect to the core based SOC. 1500 standard for embedded core test is presented to solve this problem. The detail includes the test architecture, usage of this standard and core test description language.%集成电路深亚微米制造技术和设计技术的迅速发展,使得基于IP核复用的SOC设计技术得到越来越广泛的应用,但由于IP核的来源不同,设计标准的不兼容等因素,使得SOC的测试变得越来越困难;IEEE为解决SOC的测试问题提出了嵌入式芯核测试标准IEEE Std 1500,致力于建立标准化的IP核供应商和用户之间的测试接口,简化核测试信息的复用;文章详细介绍了IEEE Std 1500标准的测试架构,使用方法和核测试描述语言CTL,同时给出标准中提出的SOC可测性设计方法.

  12. Desarrollo de aplicaciones basadas en Linux Embedded en una arquitectura basada en Cyclone V SoC (System on Chip) de Altera

    OpenAIRE

    2014-01-01

    We attempt to integrate and start up the set of necessary tools to deploy the design cycle of embedded systems based on Embedded Linux on a "Cyclone V SoC" made by Altera. First, we will analyze the available tools for designing the hardware system of the SoCkit development kit, made by Arrow, which has a "Cyclone V SoC" system (based on a "ARM Cortex-A9 MP Core" architecture). When designing the SoCkit board hardware, we will create a new peripheral to integrate it into the hardware syste...

  13. Kinect-Based Sliding Mode Control for Lynxmotion Robotic Arm

    Directory of Open Access Journals (Sweden)

    Ismail Ben Abdallah

    2016-01-01

    Full Text Available Recently, the technological development of manipulator robot increases very quickly and provides a positive impact to human life. The implementation of the manipulator robot technology offers more efficiency and high performance for several human’s tasks. In reality, efforts published in this context are focused on implementing control algorithms with already preprogrammed desired trajectories (passive robots case or trajectory generation based on feedback sensors (active robots case. However, gesture based control robot can be considered as another channel of system control which is not widely discussed. This paper focuses on a Kinect-based real-time interactive control system implementation. Based on LabVIEW integrated development environment (IDE, a developed human-machine-interface (HMI allows user to control in real time a Lynxmotion robotic arm. The Kinect software development kit (SDK provides a tool to keep track of human body skeleton and abstract it into 3-dimensional coordinates. Therefore, the Kinect sensor is integrated into our control system to detect the different user joints coordinates. The Lynxmotion dynamic has been implemented in a real-time sliding mode control algorithm. The experimental results are carried out to test the effectiveness of the system, and the results verify the tracking ability, stability, and robustness.

  14. SOC 120 ASH Tutorial course/ Uoptutorial

    OpenAIRE

    Michael Crichton

    2015-01-01

    For more course tutorials visit www.uoptutorial.com     SOC 120 WEEK 1 DQ 1 RELATIVISM SOC 120 WEEK 1 DQ 2 EGOISM AND ALTRUISM SOC 120 WEEK 2 DQ 1 SCHOOL PRAYER SOC 120 WEEK 2 DQ 2 RESPONSIBILITY AND REWARD SOC 120 WEEK 2 RELATIVISM AND MORALITY SOC 120 WEEK 3 DQ 1 DEATH PENALTY SOC 120 WEEK 3 DQ 2 FUTURE GENERATIONS AND DEVELOPMENT SOC 120 WEEK 3 ROUGH DRAFT OF FINAL PAPER ON ETHICS THEORY SOC 120 WEEK 4 DQ 1 PRESUMPTION OF INNOCENCE ...

  15. SOC Testing Methodology and Practice

    CERN Document Server

    Wu, Cheng-Wen

    2011-01-01

    On a commercial digital still camera (DSC) controller chip we practice a novel SOC test integration platform, solving real problems in test scheduling, test IO reduction, timing of functional test, scan IO sharing, embedded memory built-in self-test (BIST), etc. The chip has been fabricated and tested successfully by our approach. Test results justify that short test integration cost, short test time, and small area overhead can be achieved. To support SOC testing, a memory BIST compiler and an SOC testing integration system have been developed.

  16. 基于ARM+FPGA的GPS接收机设计%Design of a GPS receiver based on ARM and FPGA

    Institute of Scientific and Technical Information of China (English)

    邢增强; 李金海; 梁华庆; 汪峰; 阎跃鹏

    2011-01-01

    The GPS receiver based on ARM and FPGA is designed for civilian and military application. The GP2015 chip is used as the receiver' s RF front-end. The AT91SAM9261 chip based on ARM9 core and The Cyclone Ⅱ seriers EP2C70F672I8 chip are used as the base-band processing part. Also the receiver' s software design is explained,including the capture engine,tracking engine,demodulation messages,and position resolution. Through the field test, the receiver's positioning precision is 6m ( longitude)/8m ( latitude ), and the dynamic performance is 2000m/s. The receiver can achieve high dynamic navigation and positioning. It has small size, low power consumption.%针对GPS接收机在民用和军事领域的重要应用,设计了一种基于ARM+ FPGA的GPS接收机.接收机的射频前端采用GP2015芯片,基带处理部分采用ARM9内核的A191 SAM9261芯片和CycloneⅡ系列的EP2C70F67218芯片.同时阐述来接收机的软件设计,包括捕获引擎、跟踪引擎、解调电文,定位解算等.该接收机通过现场实验定位精度为6m(经度)/8m(纬度),动态性能达2000m/s,可以实现高动态导航定位,同时体积小,功耗低.

  17. Digital Signature Based Fax Machine Using ARM9 and Linux

    Directory of Open Access Journals (Sweden)

    Ch. Komali

    2013-01-01

    Full Text Available In this method we are having the S3C2240A (ARM9 Board which is ported with Linux in it. And this ARM9 board with Linux will be connected to the Touch Screen device. This ARM9 board intern will be connected to the LAN network (Ethernet. To design this fax machine we are using two Arm controller boards. One Arm board will keep at fax Transmission side and another board will keep at fax receiving side. By using the Ethernet we will send and receive the fax, for that we are using TCP/IP server and TCP/IP client. In this fax machine we have too many options on touch screen of arm like retrieve, sign, send, save etc. By selecting the retrieve option we can see the received text data on touch screen. If we want to transmit text data, we can select send option, then the fax will sent to the destination. On the receiving side, the received fax will be displayed on LCD touch screen. If necessary, we can sign directly on the touch panel by selecting the sign option. If we want to retransmit that signed document, we should active server. In this way bidirectional transmission and reception is possible

  18. Synthesis and integration of Fe-soc-MOF cubes into colloidosomes via a single-step emulsion-based approach

    KAUST Repository

    Pang, Maolin

    2013-07-17

    Bottom-up fabrication of complex 3D hollow superstructures from nonspherical building blocks (BBs) poses a significant challenge for scientists in materials chemistry and physics. Spherical colloidal silica or polystyrene particles are therefore often integrated as BBs for the preparation of an emerging class of materials, namely colloidosomes (using colloidal particles for Pickering stabilization and fusing them to form a permeable shell). Herein, we describe for the first time a one-step emulsion-based technique that permits the assembly of metal-organic framework (MOF) faceted polyhedral BBs (i.e., cubes instead of spheres) into 3D hollow superstructures (or "colloidosomes" ). The shell of each resultant hollow MOF colloidosome is constructed from a monolayer of cubic BBs, whose dimensions can be precisely controlled by varying the amount of emulsifier used in the synthesis. © 2013 American Chemical Society.

  19. Innovative Design of Plastic Bottle Recycling Box Based on ARM

    Directory of Open Access Journals (Sweden)

    Yuedong Xiong

    2014-04-01

    Full Text Available Aiming at the problems of on-site plastic bottles recycling and the reuse of waste, the automatic recycling system was developed on the basis of ARM. As the main controller, ARM not only controls the mechanical system of the collector to recover and break plastic bottles, but also communicates with and rewards the user by the automatic reward system through the wireless network. The experimental prototype test results show: post treated fragments of plastic bottles are small, which are convenient to transport and take advantage of; the operation of recovery is easy, and the interface of man-machine interaction is friendly which is easy to expand functions.

  20. Pain Control on Demand Based on Pulsed Radio-Frequency Stimulation of the Dorsal Root Ganglion Using a Batteryless Implantable CMOS SoC.

    Science.gov (United States)

    Hung-Wei Chiu; Mu-Lien Lin; Chii-Wann Lin; I-Hsiu Ho; Wei-Tso Lin; Po-Hsiang Fang; Yi-Chin Lee; Yeong-Ray Wen; Shey-Shi Lu

    2010-12-01

    This paper presents the implementation of a batteryless CMOS SoC with low voltage pulsed radio-frequency (PRF) stimulation. This implantable SoC uses 402 MHz command signals following the medical implanted communication system (MICS) standard and a low frequency (1 MHz) for RF power transmission. A body floating type rectifier achieves 84% voltage conversion ratio. A bi-phasic pulse train of 1.4 V and 500 kHz is delivered by a PRF driver circuit. The PRF parameters include pulse duration, pulse frequency and repetition rate, which are controllable via 402 MHz RF receiver. The minimal required 3 V RF Vin and 2.2 V VDDr is achieved at 18 mm gap. The SoC chip is fabricated in a 0.35 μm CMOS process and mounted on a PCB with a flexible spiral antenna. The packaged PRF SoC was implanted into rats for the animal study. Von Frey was applied to test the mechanical allodynia in a blinded manner. This work has successfully demonstrated that implanted CMOS SoC stimulating DRG with 1.4 V, 500 kHz PRF could significantly reduce spinal nerve ligation (SNL) induced mechanical allodynia for 3-7 days.

  1. Control Strategy of SOC Open-Loop of Hybrid Electric Bus Based on Driving Cycle Prediction%基于道路工况预测混合动力公交车SOC开环控制策略

    Institute of Scientific and Technical Information of China (English)

    朱道伟; 谢辉; 严英

    2012-01-01

    混合动力车辆一般采用基于荷电状态(SOC)闭环的控制策略,对蓄电池组进行频繁充电,使SOC维持在较高水平,影响制动能量的回收,从而导致燃油经济性不理想.为此,利用BP神经网络并结合城市公交运行特点,提出SOC开环控制策略,对公交车未来站点间的运行工况进行预测,减少蓄电池组的充电次数,降低蓄电池组的荷电状态.试验表明,采用该控制策略可以显著降低电池组充电时间和次数,有利于制动能量的回收,百公里油耗降低了3%.%The conventional strategy of hybrid electric vehicle was based on the state of charge (SOC) closed-loop which charged the battery frequently to sustain a high-level SOC and decreased the fuel efficiency because the energy from the regenerative braking couldn't be stored any more. SOC open-loop control strategy was proposed using the BP neural network and considering the trait of city bus to predict the next driving cycles between two stops in short future. Experiment result shows that the control strategy is useful to decrease charging times and time-period, which improve fuel efficiency by 3% higher than the vehicle on the route with the control strategy of SOC closed-loop because of enhanced regenerative braking energy.

  2. Video and graphics fusion system based on SoC in cockpit display system%基于SoC的机载显示器视频图形融合处理系统

    Institute of Scientific and Technical Information of China (English)

    钟海林; 曹峰; 高伟林; 张锋

    2016-01-01

    为了满足机载显示器对综合视频图形处理技术的需求,提出了一种基于SoC嵌入式处理平台的机载视频图形融合显示与视频记录系统实现方法。该方法以 SoC为核心搭建硬件平台,使用 SoC内部集成 ARM处理器和视频图形协处理单元执行图形生成算法与外视频采集,配合SoC片上高速存储和显示接口,采用双缓存与多线程并发机制实现视频图形融合显示和外视频实时记录。本方法支持多种格式分辨率的视频源采集和大分辨率图形同步生成。实验结果表明,采用该系统技术后机载显示器采集1024×768分辨率外视频同时生成1920×1080分辨率图形时,融合处理后帧率可达45 fps,能够满足机载显示器实时显示需求。%In order to satisfy the demand for integrated video and graphics processing technique in a cockpit display system,a method about airborne video graphics fusion display and video recording sys-tem based on SoC is proposed in this paper.Hardware platform is designed based on SoC.The graph-ics generation algorithms and video acquisition are performed by ARM processor and video graphics assist processor integrated in SoC.A double buffer and multi thread concurrent mechanism is designed to realize video graphics fusion display and real-time recording of video in cooperation with high speed storage and display interface integrated in SoC.Multiple formats resolution video source acquisition and large resolution graphics generation are supported by the proposed method.Experiments show that when capturing with 1 024×768 resolution video and generating with 1 920×1 080 resolution graphics,the fame rate is 45 fps,which satisfies the requirements of the cockpit display system.

  3. Design and Vibration Control of Safe Robot Arm with MR-Based Passive Compliant Joint

    Science.gov (United States)

    Yun, Seung-Kook; Yoon, Seong-Sik; Kang, Sungchul; Kim, Munsang

    In this paper, vibration control of a safe arm with passive compliant joints and visco-elastic covering for a human-friendly service robot is presented. The passive compliant joint (PCJ) is designed to passively attenuate the applied force. The rotary spring gives the arm compliant property, and yet it can be a source of vibration. We use an input-preshaping method which is motivated by the input shaping technique (IST) based on impulse responses. Experiments prove that both of fast motion and force attenuation of the safe arm can be achieved.

  4. DNA gridiron nanostructures based on four-arm junctions.

    Science.gov (United States)

    Han, Dongran; Pal, Suchetan; Yang, Yang; Jiang, Shuoxing; Nangreave, Jeanette; Liu, Yan; Yan, Hao

    2013-03-22

    Engineering wireframe architectures and scaffolds of increasing complexity is one of the important challenges in nanotechnology. We present a design strategy to create gridiron-like DNA structures. A series of four-arm junctions are used as vertices within a network of double-helical DNA fragments. Deliberate distortion of the junctions from their most relaxed conformations ensures that a scaffold strand can traverse through individual vertices in multiple directions. DNA gridirons were assembled, ranging from two-dimensional arrays with reconfigurability to multilayer and three-dimensional structures and curved objects.

  5. 基于ARM&FPGA的CCD图像识别装置%CCD Image Recognition Apparatus Based on ARM and FPGA

    Institute of Scientific and Technical Information of China (English)

    胡胜; 杨雷; 宋跃; 胡必武; 李君

    2012-01-01

    A sort of design technique of CCD image recognition apparatus was presented. This apparatus regarded ARM and FPGA as master control chip. Concurrent control multiple channel data acquisition of CCD image signal based on Nios II and many core based on Nios II were devised. This paper mainly introduced the design of LCD drive based on Nios II for realizing LCD display , the design of A/D sampling control module for realizing multiple channel data acquisition, the design of SL811HS drive for realizing USB correspondence of ARM and PC and so on. Experiments show that this system has the advantages of high application value,high rate,high reliability and less accident.%给出了一种CCD图像识别装置的设计方法,该装置以ARM与FPGA为主控芯片,设计了基于Nios Ⅱ的A/D控制模块并行控制多路CCD图像信号的数据采集和基于Nios Ⅱ的多种内核,重点介绍了基于Nios Ⅱ的LCD驱动以实现液晶显示、设计A/D采样控制模块以实现多路数据采集以及设计SL811HS驱动以实现ARM与PC的USB通信等.实验结果表明系统具有应用价值高、速度高、可靠性高、故障少等优点.

  6. Flexibility in infant actions during arm- and leg-based learning in a mobile paradigm.

    Science.gov (United States)

    Watanabe, Hama; Taga, Gentaro

    2009-01-01

    To understand young infants' flexible changes of learned actions when abrupt environmental changes occur, we examined fifty-four 3-month-olds who performed a mobile task, in which they learned to move the mobile by a string attached to their arms or legs (arm-based or leg-based learning). We manipulated the order of tests-arm to leg (AL) and leg to arm (LA)-and observed the time course of motion of four limbs. The infants in the AL condition showed a differentiated movement pattern, in which the movement of the connected arm was dominant, and when the connected limb changed, they immediately inhibited the prior movement pattern. The infants in the LA condition produced undifferentiated movement pattern of multiple limbs, which was maintained even when the critical limb was changed. The results suggest that the infants' flexibility of actions in a novel situation depends on the prior experience. We speculate neural mechanisms, which may underlie the difference between the arm-based and leg-based learning.

  7. The simple art of SoC design

    CERN Document Server

    Keating, Michael

    2011-01-01

    This book tackles head-on the challenges of digital design in the era of billion-transistor SoCs. It discusses fundamental design concepts in design and coding required to produce robust, functionally correct designs. It also provides specific techniques for measuring and minimizing complexity in RTL code. Finally, it discusses the tradeoff between RTL and high-level (C-based) design and how tools and languages must progress to address the needs of tomorrow's SoC designs.

  8. A Requirement for SOCS-1 and SOCS-3 Phosphorylation in Bcr-Abl-Induced Tumorigenesis

    Directory of Open Access Journals (Sweden)

    Xiaoxue Qiu

    2012-06-01

    Full Text Available Suppressors of cytokine signaling 1 and 3 (SOCS-1 and SOCS-3 are inhibitors of the Janus tyrosine kinase (JAK/signal transducers and activators of transcription (STAT pathway and function in a negative feedback loop during cytokine signaling. Abl transformation is associated with constitutive activation of JAK/STAT-dependent signaling. However, the mechanism by which Abl oncoproteins bypass SOCS inhibitory regulation remains poorly defined. Here, we demonstrate that coexpression of Bcr-Abl with SOCS-1 or SOCS-3 results in tyrosine phosphorylation of these SOCS proteins. Interestingly, SOCS-1 is highly tyrosine phosphorylated in one of five primary chronic myelogenous leukemia samples. Bcr-Abl-dependent tyrosine phosphorylation of SOCS-1 and SOCS-3 occurs mainly on Tyr 155 and Tyr 204 residues of SOCS-1 and on Tyr 221 residue of SOCS-3. We observed that phosphorylation of these SOCS proteins was associated with their binding to Bcr-Abl. Bcr-Abl-dependent phosphorylation of SOCS-1 and SOCS-3 diminished their inhibitory effects on the activation of JAK and STAT5 and thereby enhanced JAK/STAT5 signaling. Strikingly, disrupting the tyrosine phosphorylation of SOCS-1 or SOCS-3 impaired the expression of Bcl-XL protein and sensitized K562 leukemic cells to undergo apoptosis. Moreover, selective mutation of tyrosine phosphorylation sites of SOCS-1 or SOCS-3 significantly blocked Bcr-Abl-mediated tumorigenesis in nude mice and inhibited Bcr-Abl-mediated murine bone marrow transformation. Together, these results reveal a mechanism of how Bcr-Abl may overcome SOCS-1 and SOCS-3 inhibition to constitutively activate the JAK/STAT-dependent signaling, and suggest that Bcr-Abl may critically requires tyrosine phosphorylation of SOCS-1 and SOCS-3 to mediate tumorigenesis when these SOCS proteins are present in cells.

  9. 基于LabVIEW的锂电池监测系统及SOC预测研究%Lithium battery monitoring system based on LabVIEW and research on the prediction of SOC

    Institute of Scientific and Technical Information of China (English)

    陈林; 张持健; 殷安龙; 许矛盾

    2016-01-01

    In order to realize the real-time monitoring of battery parameters and the prediction of SOC. In this paper, the battery monitoring system is developed based on single chip and LabVIEW platform. With LM algorithm, build the SOC prediction model based on BP neural network and use sample data to experiment the model. Through continuous learning, the SOC predicted by BP neural network approach the actual SOC gradually. The results show that the system can display the real-time parameters of battery and store data;the prediction model realized the high nonlinear mapping between the input and the output of lithium battery, the model has high precision and is feasible.%为了实现对电池参数的实时监测和SOC的预测,中文以单片机和LabVIEW平台开发出一套电池管理系统。采用LM算法,建立了基于BP神经网络的锂电池SOC预测模型,利用样本数据进行模型实验。通过不断的学习,BP神经网络预测的SOC逐渐逼近实际的SOC。结果表明,该系统能实时显示电池参数,实现数据存储;该预测模型实现了锂电池SOC预测中输入与输出之间的高度非线性映射,预测精度高,具有可行性。

  10. Four-dimensional Map based Ni-MH battery' s SOC estimation method%基于4维Map图的镍氢电池SOC估计方法

    Institute of Scientific and Technical Information of China (English)

    胡志坤; 王文祥; 林勇; 孙岩

    2012-01-01

    A battery' s state of charge (SOC) estimation method based on the four-dimensional Map was proposed to solve the problems of current SOC estimation methods which accuracy was too low or too sensitive to data or model parameters that can not be used in practice. A Map which reflects the relation a-mong the Nickel-Metal Hydride(Ni-MH) battery's temperature, current, voltage and its SOC was established with a large number of experimental data. The approach was inspired by the finding that the adjacent charge-discharge character curves with different current, and temperature conditions are in parallel with each other within the work-interval (20% ≤Ysoc≤80% ) of the battery. Therefore, the four-dimen sional Map model of SOC, with current, temperature and voltage as its parameters, was established by interpolating in the current and temperature directions through moving the curves which is based on the relation between SOC and terminal voltage. Some experiments were conducted to verify the Map model and the result indicate that the SOC estimation error of the model is less than 3%. The SOC estimation method based on the four-dimensional Map can meet the requirements of industrial production both in accuracy and ensy realization.%针对现有镍氢电池荷电状态(SOC)估计方法因精确度太低或者对数据、模型参数要求太高而难以实用的问题,提出一种基于4维Map图的电池SOC估计方法.通过大量实验数据,建立镍氢电池SOC与温度、电流和端电压之间的基本Map图,发现在其工作区间20%≤YSOC≤80%内,不同电流、温度条件下的相邻充放电特性曲线基本相互平行.以SOC与端电压之间的关系为基础,分别在电流和温度方向上采用曲线平移的方式插值得到SOC与电流、温度、电压之间的4维Map图模型.利用试验数据进行SOC估计试验,试验结果表明,利用4维Map图模型的SOC估计误差在3%以内,基于4维Map图的

  11. Admittance Control of a Multi-Finger Arm Based on Manipulability of Fingers

    Directory of Open Access Journals (Sweden)

    Takayuki Hori

    2011-09-01

    Full Text Available In the previous studies, admittance control and impedance control for a finger‐arm robot using the manipulability of the finger were studied and methods of realizing the controls have been proposed. In this study, two 3‐DOF fingers are attached to the end‐effector of a 6‐DOF arm to configure a multi‐finger arm robot. Based on the previous methods, the authors have proposed an admittance control for a multi‐finger arm robot using the manipulability of the fingers in this study. Algorithms of the averaging method and the mini‐max method were introduced to establish a manipulability criterion of the two fingers in order to generate a cooperative movement of the arm. Comparison of the admittance controls combined with the top search method and local optimization method for the multi‐finger arm robot was made and features of the control methods were also discussed. The stiffness control and damping control were experimentally evaluated to demonstrate the effectiveness of the proposed methods.

  12. Design of a System Verification Platform for Mixed-Signal SoC Based on 8 bit CPU Core%一种基于8 bit CPU核的混合SoC验证平台的设计

    Institute of Scientific and Technical Information of China (English)

    虞致国; 魏敬和

    2009-01-01

    提出了一种基于8 bit CPU的混合信号SoC的验证平台.该平台能够完成IP模块验证、软硬件协同验证、混合验证等关键验证流程.该验证平台已经成功地应用在某混合信号SoC的设计上,并在0.35 μm CMOS工艺上进行了实现.该验证平台对其它混合SoC设计具有一定的参考作用.%A verification solution based on 8 bit CPU for mixed-signal SoC named SoC-MV is presented. SoC-MV can support IP ftmction verification, collaborative verification, and mixed-signal verification. The platform has been applied to a mixed-signal SoC including 8 bit CPU and an ADC. This SoC has been fabricated by 0.35 μm CMOS process and the chip test results show that the chip is successful and the interface between digital and analog works properly.

  13. 基于XML Schema的细粒度SoC设计复用方法%An XML Schema based fine-grained SoC reuse methodology

    Institute of Scientific and Technical Information of China (English)

    孟昕; 沈海斌; 严晓浪

    2011-01-01

    针对传统的基于模块复用的SoC可复用设计方法学在面对结构复用或抽象内容复用时效率低、设计迭代代价高的缺陷,提出基于XML Schema的细粒度设计复用方法(FGRX),扩充了传统可复用设计方法学,通过分析现有设计把更小的逻辑结构、代码片段和抽象内容吸纳为可复用对象,并基于可复用对象构建设计原语集和复用规则集.FGRX用XML Schema对原语集和复用规则集完成形式化定义,同类设计或同一产品线中的类似芯片设计描述在原语级以XML格式完成.利用XML Validator自动构建基于复用规则集的原语级描述校验器,对设计描述完成静态结构检查.利用XSLT设计转换规则,把由可复用对象组成的原语级设计描述转换成各种标准格式的设计文件,并在转换过程中实现细致的语义检查,进一步校验模型描述.以一个实际应用具体讨论了FGRX的应用过程,实际应用结果证明:FGRX能充分复用现有工作成果、高效可靠地完成同类模块的设计或同一产品线中同类芯片的开发、大规模精简描述代码、减少设计者重复劳动的工作量以及提升工作效率.%Traditional module based reuse methodology for SoC design has low efficiency and high iterationcost when faced with reuse of structure and abstract contents. This work proposed a fine-grained reusable design methodology based on XML schema(FGRX) as an extension to traditional methodology.Smaller logic blocks, code snippets and abstract contents are abstracted as reusable objects through analysis of existingdesign, which can be further used to construct a primitive set. Inter-dependencies between abstract reusable objects are organized in reusing rules set. Primitive set and reusing rule set are formally defined using XML schema. Similar designs are described at primitive level in XML format, which is statically validated by a checker that is automatically generated by XML validator

  14. Evaluation of inertial devices for the control of large, flexible, space-based telerobotic arms

    Science.gov (United States)

    Montgomery, Raymond C.; Kenny, Sean P.; Ghosh, Dave; Shenhar, Joram

    1993-01-01

    Inertial devices, including sensors and actuators, offer the potential of improving the tracking of telerobotic commands for space-based robots by smoothing payload motions and suppressing vibrations. In this paper, inertial actuators (specifically, torque-wheels and reaction-masses) are studied for that potential application. Batch simulation studies are presented which show that torque-wheels can reduce the overshoot in abrupt stop commands by 82 percent for a two-link arm. For man-in-the-loop evaluation, a real-time simulator has been developed which samples a hand-controller, solves the nonlinear equations of motion, and graphically displays the resulting motion on a computer workstation. Currently, two manipulator models, a two-link, rigid arm and a single-link, flexible arm, have been studied. Results are presented which show that, for a single-link arm, a reaction-mass/torque-wheel combination at the payload end can yield a settling time of 3 s for disturbances in the first flexible mode as opposed to 10 s using only a hub motor. A hardware apparatus, which consists of a single-link, highly flexible arm with a hub motor and a torque-wheel, has been assembled to evaluate the concept and is described herein.

  15. Online Monitoring System Design of Intelligent Circuit Breaker Based on DSP and ARM

    Directory of Open Access Journals (Sweden)

    Meng Song

    2014-08-01

    Full Text Available In order to accurately analyze the dynamic characteristics of the vacuum circuit breaker, a dual-core master-slave processor structure for online monitoring system based on DSP and ARM is proposed. This structure consists of host computer, lower computer and signal processing modules. The lower computer uses DSP as the core, which completes acquisition and data preprocessing of circuit breaker’s dynamic characteristics through sensors and signal conditioning circuits. The host computer uses ARM as the core which is responsible for task management, analysis, processing and displaying collected data via Ethernet. The communication between DSP and ARM is conducted by HPI. This design improves the reliability of intelligent control unit for the circuit breaker. The experiment showed that this system works steadily and accuracy.

  16. Angiography-based C-arm CT for the assessment of extrahepatic shunting before radioembolization

    Energy Technology Data Exchange (ETDEWEB)

    Heusner, Till Alexander; Hahn, S.; Forsting, M.; Antoch, G. [Inst. fuer Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitaetsklinik Essen (Germany); Hamami, M.E.; Poeppel, T.; Bockisch, A. [Klinik fuer Nuklearmedizin, Universitaetsklinik Essen (Germany); Ertle, J.; Hilgard, P. [Klinik fuer Gastroenterologie, Universitaetsklinik Essen (Germany)

    2010-07-15

    Purpose: to retrospectively assess the accuracy of angiography-based C-arm CT for the detection of extrahepatic shunting before SIRT. Materials and methods: 30 patients (mean age: 64 {+-} 12 years) with hypervascularized hepatic tumors underwent hepatic angiography, coil embolization of gastrointestinal collaterals and 99mTc-macroaggregated albumin (MAA) SPECT/CT before SIRT. Before MAA injection via a microcatheter from the intended treatment position, an angiography and angiography-based C-arm CT (XperCT trademark, Philips Healthcare) were acquired. Angiographies and XperCT trademark were performed from 48 microcatheter positions followed by MAA injections and MAA-SPECT/CT. MAA-SPECT/CT served as the reference standard for determining the accuracy of hepatic arteriography and C-arm CT for the detection of extrahepatic shunting. Results: MAA-SPECT/CT revealed extrahepatic shunting in 5 patients (17%). Hepatic arteriography yielded a true negative in 22 (73%), a false negative in 5 (17%), and an unclear result in 3 patients (10%). C-arm CT yielded a true positive in 3 (10%), true negative in 24 (80%), false positive in 1 (3%), and false negative in 2 patients (7%). The specificity and the NPV of hepatic arteriography for the detection of extrahepatic shunting were 88% and 81%, respectively. For C-arm CT the sensitivity, specificity, PPV, NPV, and accuracy for the detection of extrahepatic shunting were 60%, 96%, 75%, 92%, and 90%, respectively. Conclusion: C-arm CT offers additional information to angiography when assessing SIRT patients for extrahepatic shunting. More accurate detection of extrahepatic shunting may optimize the workflow in SIRT preparations by avoiding unnecessary repeat angiographies. (orig.)

  17. [A surgical navigation system based on C-arm fluoroscopy images].

    Science.gov (United States)

    Qian, Liwei; Yan, Shijun; Xia, Qing; Wang, Chengtao

    2009-10-01

    A surgical navigation system based on X-rays of C-arm with a calibration target has been studied and developed. Extracting images of markers in the two templates on the calibration target, the system is able to establish the relationship between different markers coordinates in different coordinate systems using the algorithm based on the layout of specific markers. The correction of X-ray image distortion and C-arm camera calibration are performed using the images of calibration target as bases. After the parameters of the C-arm projection model being determined, an X-ray image of surgical site will be acquired preoperatively; the surgical instruments will be tracked by the optical position system, and then virtual projections of instruments can be formed on preoperative images. Surgeons will perform operations with the guidance of the system. The C-arm can be used less frequently and the X-ray radiation can be reduced. Cadaveric spine specimen experiments and error analysis have underpinned the clinical feasibility of the system.

  18. Design of CNC Based on ARM+PMAC%基于ARM+PMAC结构的数控系统设计

    Institute of Scientific and Technical Information of China (English)

    戴朝永

    2010-01-01

    主要阐述AKM+PMAC的数控系统的硬件体系架构、ARM(μC/OS)与PMAC之间的通讯的实现、ARM与PMAC数控系统软件结构,这种结构思路能够开发出高速高精的数控系统.

  19. Design of Objects Tracking System Based on ARM Embedded Platform

    Institute of Scientific and Technical Information of China (English)

    XU Mei; SONG Yong-duan; LV Shao-dong; LIU Zhi-long; HUANG Cong-ying

    2014-01-01

    In recent years, according to the need of intelligent video surveillance system increasing rapidly in metropolitan cities ,a design based on S3C2440 microprocessor and embedded Linux operating system is adopted for real-time video target tracking. However, it is very challenging as embedded systems usually afford limited processing power and limited resources. Therefore, to address this problem, a real-time tracking algorithm using multi-features based on compressive sensing is proposed and implemented. The algorithm uses multiple matrix as the projection matrix of the compressive sensing and the compressed date as the multiple features to extract useful information needed by tracking process. Functions and libraries in OpenCV which were developed by Intel Corporation are utilized for building the tracking algorithms. It is tested with variant video sequences and the results show that the algorithm achieves stable tracking for the target moved of the light changed.

  20. Settling-velocity specific SOC distribution on hillslopes

    Science.gov (United States)

    Hu, Yaxian; Asefaw Berhe, Asmeret; Fogel, Marilyn L.; Heckrath, Goswin J.; Kuhn, Nikolaus J.

    2016-04-01

    The net effect of soil erosion by water, as a sink or source of atmospheric CO2, is determined by the spatial (re-)distribution and stability of eroded soil organic carbon (SOC). The depositional position of eroded SOC is a function of the transport distances of soil fractions where the SOC is stored. In theory, the transport distances of soil fractions are related to their settling velocities under given flow conditions. Yet, very few field investigations have been conducted to examine the actual movement of eroded soil fractions along hillslopes, let alone the re-distribution pattern of SOC fractions. Eroding sandy soils and sediment were sampled after a series of rainfall events along a slope on a freshly seeded cropland in Jutland, Denmark. All the soil samples were fractionated into five settling classes using a settling tube apparatus. The spatial distribution of soil settling classes shows a coarsening effect immediately below the eroding slope, followed by a fining trend at the slope tail. The δ13C values of soil fractions were more positive at the footslope than on the slope shoulder or at the slope tail, suggesting enhanced decomposition rate of fresh SOC input at the footslope during or after erosion-induced transport. Overall, our results illustrate that immediate deposition of fast settling soil fractions and the associated SOC at footslopes must be appropriately accounted for in attempts to quantify the role of soil erosion in terrestrial carbon sequestration. A SOC erodibility parameter based on actual settling velocity distribution of eroded fractions is needed to better calibrate soil erosion models.

  1. 基于模糊卡尔曼滤波的HEV氢镍电池SOC估计%Estimation of SOC of Ni-MH batteries based on fuzzy adaptive Kalman filtering for HEV

    Institute of Scientific and Technical Information of China (English)

    李德东; 王振臣; 郭小星

    2011-01-01

    混合动力汽车(HEV)电池管理系统工作于恶劣工况环境中,采用常规卡尔曼滤波算法估计电池荷电状态(SOC)时,量测噪声统计特性随实际工况条件剧烈变化,会导致估测不准,甚至滤波发散.采用基于模糊自适应卡尔曼滤波的氢镍动力电池SOC估算算法,通过监视理论残差与实际残差的比值,对量测噪声协方差阵进行递推在线修正,使其逐渐逼近真实噪声水平,从而使滤波器执行最优估计,提高估算精度.仿真结果表明,这种算法对随机的量测噪声具有较强的抑制能力.%Hybrid electric vehicle (HEV) battery management system works in bad condition environment, when using the conventional Kalman filtering algorithms estimating SOC(state of charge) of batteries, the acute changes of the statistical properties of measurement noise will lead to inaccurate estimates, even divergent filtering. The estimation algorithm for SOC of Ni-MH batteries based on the fuzzy adaptive Kalman filter was used in this paper. By monitoring the filter residual and actual residual, this algorithm modified recursively the measurement noise covariance of Kalman filtering online using the fuzzy inference system (FIS) to make the covariance close to real measurement covariance gradually. Accordingly, the accuracy of the estimate system was improved. Matlab simulation and experiments were carried out. The comparison indicates that the fuzzy adaptive Kalman filtering performs well when disturbance happens.

  2. ETHERNET PACKET PROCESSOR FOR SOC APPLICATION

    Directory of Open Access Journals (Sweden)

    Raja Jitendra Nayaka

    2012-07-01

    Full Text Available As the demand for Internet expands significantly in numbers of users, servers, IP addresses, switches and routers, the IP based network architecture must evolve and change. The design of domain specific processors that require high performance, low power and high degree of programmability is the bottleneck in many processor based applications. This paper describes the design of ethernet packet processor for system-on-chip (SoC which performs all core packet processing functions, including segmentation and reassembly, packetization classification, route and queue management which will speedup switching/routing performance. Our design has been configured for use with multiple projects ttargeted to a commercial configurable logic device the system is designed to support 10/100/1000 links with a speed advantage. VHDL has been used to implement and simulated the required functions in FPGA.

  3. Embedded platform of NURBS interpolation based on ARM-FPGA%基于ARM-FPGA的NURBS插补嵌入式平台研究

    Institute of Scientific and Technical Information of China (English)

    聂明星; 蒋新华; 李光炀; 陈兴武; 朱娜思

    2014-01-01

    This paper proposes an NURBS curve interpolation hardware platform based on ARM-FPGA embedded tech-nology to achieve the purpose of high-speed and high-accuracy motion control. The hardware structure is designed. Then, the cross clock domain problem between ARM and FPGA is solved by using R/W falling edge as synchronization signal. The ARM-FPGA embedded hardware platform is developed independently. The practical test shows that data transfer between ARM and FPGA is reliable, and the proposed architecture would effectively reduce the computational load of NURBS curve interpolation in one single processor.%针对非均匀有理B样条(Non-Uniform Rational B-Spline,NURBS)曲线高速高精加工过程中计算负载高的问题,提出基于ARM-FPGA嵌入式技术的NURBS曲线插补硬件平台,对硬件平台结构进行了设计,利用读写下降沿同步信号解决ARM与FPGA跨时钟域总线传输问题,自主开发了ARM-FPGA嵌入式硬件平台。该平台结构具有小型化、智能化特点,在硬件平台上经实际测试表明,ARM与FPGA之间数据传输稳定可靠,能有效降低单一处理器的计算负载。

  4. 基于SOC nRF24LE1的采煤机无线遥控系统的设计%Design of a remote control system for shearers based on SOC nRF24LE1

    Institute of Scientific and Technical Information of China (English)

    陈斯; 赵同彬; 游春霞

    2012-01-01

    A remote control system for the shearer was designed based on 2.4 GHz wireless SOC chip nRF24LE1.The system used nRF24LE1 as the core,and consisted of three parts that were palmtop remote controller,onboard transceiver and onboard PLC.The onboard transceiver collected all working parameters of the shearer and transmitted the data to the palmtop remote controller in wireless way,then the data displayed on LCD in real-time.At the same time,when receiving the button instructions,the onboard transceiver controlled all kinds of shearer actions by the onboard PLC.With the embedded high-performance microprocessors intelligent RF transceiver SOC chip nRF24LE1,the system possessed the features such as low cost,low power consumption and stable performance etc.%基于2.4GHz无线SOC芯片nRF24LE1设计了一种采煤机无线遥控系统。系统以nRF24LE1为核心,包括掌上摇控器、机载收发装置和机载PLC三部分。机载收发装置采集采煤机的各种工作参数,通过无线方式将数据传送至掌上遥控器,并实时显示在LCD上。机载收发装置接收到按键指令后,经机载PLC装置来控制采煤机的各种动作。由于采用了高性能的嵌入式微处理器智能射频收发SOC芯片nRF24LE1,系统具有低成本、低功耗及性能稳定等特点。

  5. SEMICONDUCTOR INTEGRATED CIRCUITS: A 0.5-1.7 GHz low phase noise ring-oscillator-based PLL for mixed-signal SoCs

    Science.gov (United States)

    Yishu, Jiao; Yumei, Zhou; Jianhua, Jiang; Bin, Wu

    2010-09-01

    This paper describes the design of a fully integrated low phase noise CMOS phase-locked loop for mixed-signal SoCs with a wide range of operating frequencies. The design proposes a multi-regulator PLL architecture, in which every noise-sensitive block from the PLL top level is biased from a dedicated linear or shunt regulator, reducing the parasitic noise and spur coupling between different PLL building blocks. Supply-induced VCO frequency sensitivity of the PLL is less than 0.07%-fvco/1%-VDD. The design is fabricated in 0.13 μm 1.5/3.3 V CMOS technology. The in-band phase noise of -102 dBc/Hz at 1 MHz offset with a spur of less than -45 dBc is measured from 1.25 GHz carrier. The measured RMS jitter of the proposed PLL is 1.72 ps at a 1.25 GHz operating frequency. The total power consumption is 19 mW, and its active area is 0.19 mm2.

  6. SpaceWire- Based Control System Architecture for the Lightweight Advanced Robotic Arm Demonstrator [LARAD

    Science.gov (United States)

    Rucinski, Marek; Coates, Adam; Montano, Giuseppe; Allouis, Elie; Jameux, David

    2015-09-01

    The Lightweight Advanced Robotic Arm Demonstrator (LARAD) is a state-of-the-art, two-meter long robotic arm for planetary surface exploration currently being developed by a UK consortium led by Airbus Defence and Space Ltd under contract to the UK Space Agency (CREST-2 programme). LARAD has a modular design, which allows for experimentation with different electronics and control software. The control system architecture includes the on-board computer, control software and firmware, and the communication infrastructure (e.g. data links, switches) connecting on-board computer(s), sensors, actuators and the end-effector. The purpose of the control system is to operate the arm according to pre-defined performance requirements, monitoring its behaviour in real-time and performing safing/recovery actions in case of faults. This paper reports on the results of a recent study about the feasibility of the development and integration of a novel control system architecture for LARAD fully based on the SpaceWire protocol. The current control system architecture is based on the combination of two communication protocols, Ethernet and CAN. The new SpaceWire-based control system will allow for improved monitoring and telecommanding performance thanks to higher communication data rate, allowing for the adoption of advanced control schemes, potentially based on multiple vision sensors, and for the handling of sophisticated end-effectors that require fine control, such as science payloads or robotic hands.

  7. Arm Orthosis/Prosthesis Movement Control Based on Surface EMG Signal Extraction.

    Science.gov (United States)

    Suberbiola, Aaron; Zulueta, Ekaitz; Lopez-Guede, Jose Manuel; Etxeberria-Agiriano, Ismael; Graña, Manuel

    2015-05-01

    This paper shows experimental results on electromyography (EMG)-based system control applied to motorized orthoses. Biceps and triceps EMG signals are captured through two biometrical sensors, which are then filtered and processed by an acquisition system. Finally an output/control signal is produced and sent to the actuators, which will then perform the actual movement, using algorithms based on autoregressive (AR) models and neural networks, among others. The research goal is to predict the desired movement of the lower arm through the analysis of EMG signals, so that the movement can be reproduced by an arm orthosis, powered by two linear actuators. In this experiment, best accuracy has achieved values up to 91%, using a fourth-order AR-model and 100ms block length.

  8. The Redundant Arm Self-motion Control Based on Self-tuning Fuzzy PID Controller

    Institute of Scientific and Technical Information of China (English)

    Liu Yu(刘宇); Sun Lining; Du Zhijiang

    2004-01-01

    A fuzzy control algorithm based on self-tuning PID proportional factor is presented. To a certain degree, it overcomes robot motion control's nonlinearity and uncertainty caused by joints coupled and friction, and decreases overshoot of end manipulator's tracking desired curves. The controller's structure is very simple but effective. With this control method, a 7-DOF redundant arm's self-motion developed by the authors is investigated. Research results show that the said controller restrains track overshoot and possesses preferable merits.

  9. First experience with particle-in-cell plasma physics code on ARM-based HPC systems

    Science.gov (United States)

    Sáez, Xavier; Soba, Alejandro; Sánchez, Edilberto; Mantsinen, Mervi; Mateo, Sergi; Cela, José M.; Castejón, Francisco

    2015-09-01

    In this work, we will explore the feasibility of porting a Particle-in-cell code (EUTERPE) to an ARM multi-core platform from the Mont-Blanc project. The used prototype is based on a system-on-chip Samsung Exynos 5 with an integrated GPU. It is the first prototype that could be used for High-Performance Computing (HPC), since it supports double precision and parallel programming languages.

  10. Variation tolerant SoC design

    Science.gov (United States)

    Kozhikkottu, Vivek J.

    performance distribution. This task is particularly complex and challenging due to the inter-dependencies between components' execution, indirect effects of shared resources, and interactions between multiple system-level "execution paths". We argue that accurate variation-aware performance analysis requires Monte-Carlo based repeated system execution. Our proposed analysis framework leverages emulation to significantly speedup performance analysis without sacrificing the generality and accuracy achieved by Monte-Carlo based simulations. Our experiments show performance improvements of around 60x compared to state-of-the-art hardware-software co-simulation tools and also underscore the framework's potential to enable variation-aware design and exploration at the system level. Our second contribution addresses the problem of designing variation-tolerant SoCs using recovery based design, a popular circuit design paradigm that addresses variations by eliminating guard-bands and operating circuits at close to "zero margins" while detecting and recovering from timing errors. While previous efforts have demonstrated the potential benefits of recovery based design, we identify several challenges that need to be addressed in order to apply this technique to SoCs. We present a systematic design framework to apply recovery based design at the system level. We propose to partition SoCs into "recovery islands", wherein each recovery island consists of one or more SoC components that can recover independent of the rest of the SoC. We present a variation-aware design methodology that partitions a given SoC into recovery islands and computes the optimal operating points for each island, taking into account the various trade-offs involved. Our experiments demonstrate that the proposed design framework achieves an average of 32% energy savings over conventional worst-case designs, with negligible losses in performance. The third contribution of this thesis introduces disproportionate

  11. Performance benefits of telerobotics and teleoperation - enhancements for an arm-based tank waste retrieval system

    Energy Technology Data Exchange (ETDEWEB)

    Horschel, D.S. [Sandia National Labs., Albuquerque, NM (United States); Gibbons, P.W. [Westinghouse Hanford Co., Richland, WA (United States); Draper, J.V. [Oak Ridge National Lab., TN (United States)] [and others

    1995-06-01

    This report evaluates telerobotic and teleoperational arm-based retrieval systems that require advanced robotic controls. These systems will be deployed in waste retrieval activities in Hanford`s Single Shell Tanks (SSTs). The report assumes that arm-based, retrieval systems will combine a teleoperational arm and control system enhanced by a number of advanced and telerobotic controls. The report describes many possible enhancements, spanning the full range of the control spectrum with the potential for technical maturation. The enhancements considered present a variety of choices and factors including: the enhancements to be included in the actual control system, safety, detailed task analyses, human factors, cost-benefit ratios, and availability and maturity of technology. Because the actual system will be designed by an offsite vendor, the procurement specifications must have the flexibility to allow bidders to propose a broad range of ideas, yet build in enough restrictions to filter out infeasible and undesirable approaches. At the same time they must allow selection of a technically promising proposal. Based on a preliminary analysis of the waste retrieval task, and considering factors such as operator limitations and the current state of robotics technology, the authors recommend a set of enhancements that will (1) allow the system to complete its waste retrieval mission, and (2) enable future upgrades in response to changing mission needs and technological advances.

  12. Portable voice-service group call system based on ARM-Linux%基于ARM-Linux的便携式语音群呼系统

    Institute of Scientific and Technical Information of China (English)

    钱莹晶; 张仁民

    2014-01-01

    In order to improve office efficiency and realize the intelligent life, the portable voice-service group call system based on the ARM-Linux is designed. This system is composed of ARM processor (S3C2440), GSM module (TC35i) and voice module (UDA1341). The recorded speech is played through the GSM module controlled by AT instruction coming from ARM. Test results show that this system can record speech, set up call numbers, dial playback and display the unsuccessful numbers automatically. The system has the advantages of friendly interface, simple operation and low cost.%为了提高办公的效率和实现人民生活的智能化,研制了一种基于 ARM-Linux 的便携式语音业务群呼系统。系统以 S3C2440为处理器、TC35i 为GSM 模块、UDA1341为语音芯片, ARM 处理器通过 AT 指令控制 GSM 模块将录制好的语音业务进行群呼。测试结果表明,该系统具有录入话音、设置呼叫号码、自动拨号放音和统计未呼叫成功号码等功能,系统操作简单、界面友好、成本低廉。

  13. 基于电池SOC保持的混联式混合动力车辆能量管理策略的研究%A Research on SOC Retaining-Based Energy Management Strategy for PSHEV

    Institute of Scientific and Technical Information of China (English)

    王伟达; 项昌乐; 韩立金; 刘辉; 刘晓亭

    2011-01-01

    针对混联式混合动力重型车辆的大驱动功率需求,研究了基于电池SOC保持的能量管理策略.该策略根据保持电池SOC在较高水平的要求进行能量管理与分配,使电池具有较高的功率与能量裕度,从而使电动机可以较大的功率和较长的时间在急加速等大驱动功率需求工况对发动机进行助力,实现重型车辆较高的动力性指标.在此基础上设计了综合控制器并编写了程序代码,采用基于dSPACE的硬件在环仿真系统进行了仿真.结果表明该控制策略在满足燃油经济性和车辆驱动等基本要求的前提下,实现了混联式混合动力车辆能量管理功能与预期的电池SOC保持的目标.%Aiming at the high drive power demand of heavy parallel-serial hybrid electric vehicle ( PSHEV), an energy management strategy based on battery state of charge (SOC) maintaining is studied. With the strategy, energy management and distribution are conducted according to the requirement of maintaining battery SOC at a relatively high level for the battery having higher power and energy margin to enable electric motor to assist the engine with higher power in longer time at a working condition demanding high drive power such as hard acceleration, achieving higher power performance indicator of heavy vehicles. On these bases the ECU is designed with a corresponding program code written, and a simulation is performed with a dSPACE-based hardware-in-the-loop simulation system. The results indicate that the control algorithm can realize the energy management function and the expected battery SOC keeping target of PSHEV while meeting the basic requirements, including fuel economy and vehicle drive.

  14. Toward attenuating the impact of arm positions on electromyography pattern-recognition based motion classification in transradial amputees

    Directory of Open Access Journals (Sweden)

    Geng Yanjuan

    2012-10-01

    Full Text Available Abstract Background Electromyography (EMG pattern-recognition based control strategies for multifunctional myoelectric prosthesis systems have been studied commonly in a controlled laboratory setting. Before these myoelectric prosthesis systems are clinically viable, it will be necessary to assess the effect of some disparities between the ideal laboratory setting and practical use on the control performance. One important obstacle is the impact of arm position variation that causes the changes of EMG pattern when performing identical motions in different arm positions. This study aimed to investigate the impacts of arm position variation on EMG pattern-recognition based motion classification in upper-limb amputees and the solutions for reducing these impacts. Methods With five unilateral transradial (TR amputees, the EMG signals and tri-axial accelerometer mechanomyography (ACC-MMG signals were simultaneously collected from both amputated and intact arms when performing six classes of arm and hand movements in each of five arm positions that were considered in the study. The effect of the arm position changes was estimated in terms of motion classification error and compared between amputated and intact arms. Then the performance of three proposed methods in attenuating the impact of arm positions was evaluated. Results With EMG signals, the average intra-position and inter-position classification errors across all five arm positions and five subjects were around 7.3% and 29.9% from amputated arms, respectively, about 1.0% and 10% low in comparison with those from intact arms. While ACC-MMG signals could yield a similar intra-position classification error (9.9% as EMG, they had much higher inter-position classification error with an average value of 81.1% over the arm positions and the subjects. When the EMG data from all five arm positions were involved in the training set, the average classification error reached a value of around 10.8% for

  15. ARMS: An Agent-Based Resource Management System for Grid Computing

    Directory of Open Access Journals (Sweden)

    Junwei Cao

    2002-01-01

    Full Text Available Resource management is an important component of a grid computing infrastructure. The scalability and adaptability of such systems are two key challenges that must be addressed. In this work an agent-based resource management system, ARMS, is implemented for grid computing. ARMS utilises the performance prediction techniques of the PACE toolkit to provide quantitative data regarding the performance of complex applications running on a local grid resource. At the meta-level, a hierarchy of homogeneous agents are used to provide a scalable and adaptable abstraction of the system architecture. Each agent is able to cooperate with other agents and thereby provide service advertisement and discovery for the scheduling of applications that need to utilise grid resources. A case study with corresponding experimental results is included to demonstrate the efficiency of the resource management and scheduling system.

  16. Developing an ARM based GNU/Linux Operating System for Single Board Computer – Cubietruck

    Directory of Open Access Journals (Sweden)

    S.Pravin Kumar

    2014-12-01

    Full Text Available The design and implementation of a Monolithic-Kernel Single Board Computer (SBC - Cubietruck GNU/Linux-like operating system on ARM platform in technical details, including boot loader design - UBOOT, building the Kernel - uImage, design of root file system and init process. The Single Board Computer Operating System (SBC OS is developed on Linux platform with GNU tool chain. The SBC OS can be used for both SBC system application development and related curriculum teaching. Single Board Computer like embedded system related curriculums are already become necessary components for undergraduate computer majors. The system is mainly designed for the purpose of technical research and curriculum based teaching and students to learn, study and more readable, of which the source codes can be provided to students, guiding them to design tiny operating system on ARM platform from scratch.

  17. Petri net-based scheduling of time constrained single-arm cluster tools with wafer revisiting

    Directory of Open Access Journals (Sweden)

    ZiCheng Liu

    2016-05-01

    Full Text Available It is very difficult to schedule a single-arm cluster tool with wafer revisiting such that wafer residency time constraints are satisfied. This article conducts a study on this challenging problem for a single-arm cluster tool with atomic layer deposition process. With a so-called p-backward strategy being applied, a Petri net model is developed to describe the dynamic behavior of the system. Based on the model, the existence of a feasible schedule is analyzed, schedulability conditions are derived, and scheduling algorithms are presented if there is a schedule. A schedule is obtained by simply setting the robot waiting time if schedulable, and it is very computationally efficient. The obtained schedule is shown to be optimal. Illustrative examples are given to demonstrate the proposed approach.

  18. An embedded laser marking controller based on ARM and FPGA processors.

    Science.gov (United States)

    Dongyun, Wang; Xinpiao, Ye

    2014-01-01

    Laser marking is an important branch of the laser information processing technology. The existing laser marking machine based on PC and WINDOWS operating system, are large and inconvenient to move. Still, it cannot work outdoors or in other harsh environments. In order to compensate for the above mentioned disadvantages, this paper proposed an embedded laser marking controller based on ARM and FPGA processors. Based on the principle of laser galvanometer scanning marking, the hardware and software were designed for the application. Experiments showed that this new embedded laser marking controller controls the galvanometers synchronously and could achieve precise marking.

  19. An Embedded Laser Marking Controller Based on ARM and FPGA Processors

    Directory of Open Access Journals (Sweden)

    Wang Dongyun

    2014-01-01

    Full Text Available Laser marking is an important branch of the laser information processing technology. The existing laser marking machine based on PC and WINDOWS operating system, are large and inconvenient to move. Still, it cannot work outdoors or in other harsh environments. In order to compensate for the above mentioned disadvantages, this paper proposed an embedded laser marking controller based on ARM and FPGA processors. Based on the principle of laser galvanometer scanning marking, the hardware and software were designed for the application. Experiments showed that this new embedded laser marking controller controls the galvanometers synchronously and could achieve precise marking.

  20. Note: Model-based identification method of a cable-driven wearable device for arm rehabilitation

    Science.gov (United States)

    Cui, Xiang; Chen, Weihai; Zhang, Jianbin; Wang, Jianhua

    2015-09-01

    Cable-driven exoskeletons have used active cables to actuate the system and are worn on subjects to provide motion assistance. However, this kind of wearable devices usually contains uncertain kinematic parameters. In this paper, a model-based identification method has been proposed for a cable-driven arm exoskeleton to estimate its uncertainties. The identification method is based on the linearized error model derived from the kinematics of the exoskeleton. Experiment has been conducted to demonstrate the feasibility of the proposed model-based method in practical application.

  1. Trajectory control of an articulated robot with a parallel drive arm based on splines under tension

    Science.gov (United States)

    Yi, Seung-Jong

    Today's industrial robots controlled by mini/micro computers are basically simple positioning devices. The positioning accuracy depends on the mathematical description of the robot configuration to place the end-effector at the desired position and orientation within the workspace and on following the specified path which requires the trajectory planner. In addition, the consideration of joint velocity, acceleration, and jerk trajectories are essential for trajectory planning of industrial robots to obtain smooth operation. The newly designed 6 DOF articulated robot with a parallel drive arm mechanism which permits the joint actuators to be placed in the same horizontal line to reduce the arm inertia and to increase load capacity and stiffness is selected. First, the forward kinematic and inverse kinematic problems are examined. The forward kinematic equations are successfully derived based on Denavit-Hartenberg notation with independent joint angle constraints. The inverse kinematic problems are solved using the arm-wrist partitioned approach with independent joint angle constraints. Three types of curve fitting methods used in trajectory planning, i.e., certain degree polynomial functions, cubic spline functions, and cubic spline functions under tension, are compared to select the best possible method to satisfy both smooth joint trajectories and positioning accuracy for a robot trajectory planner. Cubic spline functions under tension is the method selected for the new trajectory planner. This method is implemented for a 6 DOF articulated robot with a parallel drive arm mechanism to improve the smoothness of the joint trajectories and the positioning accuracy of the manipulator. Also, this approach is compared with existing trajectory planners, 4-3-4 polynomials and cubic spline functions, via circular arc motion simulations. The new trajectory planner using cubic spline functions under tension is implemented into the microprocessor based robot controller and

  2. Cost Modeling for SOC Modules Testing

    OpenAIRE

    Balwinder Singh; Arun Khosla; Sukhleen B. Narang

    2013-01-01

    The complexity of the system design is increasing very rapidly as the number of transistors on Integrated Circuits (IC) doubles as per Moore’s law.There is big challenge of testing this complex VLSI circuit, in which whole system is integrated into a single chip called System on Chip (SOC). Cost of testing the SOC is also increasing with complexity. Cost modeling plays a vital role in reduction of test cost and time to market. This paper includes the cost modeling of the SOC Module testing...

  3. 一种基于 ARM 的嵌入式图像处理系统设计磁%Embedded Image Processing System Based on ARM

    Institute of Scientific and Technical Information of China (English)

    陆旭; 梁光明; 陈韵迪

    2016-01-01

    针对传统的 ARM 嵌入式系统在图像显示和处理上存在处理速度慢,效率低,很难做到完全实时的问题,论文设计了一种基于 ARM 的嵌入式图像处理系统,该系统采用 Qt 多线程技术实现图像实时显示和提高图像处理效率。以ARM Cortex — A8处理器(S5PV210)为核心搭建硬件平台,搭建 Linux 嵌入式操作系统环境,设计基于 V4L2接口的视频图像采集程序,采用 Qt 多线程技术编写对图像进行采集、显示、存储及处理的图形应用程序。该系统体积小、功耗低、成本低、速度快、通用性强,可用于各领域的嵌入式图像处理。%In view of the traditional ARM embedded system exists slow processing speed in the image display and pro ‐cessing ,low efficiency in the system ,hard to complete real‐time ,this study designs a kind of embedded image processing system based on ARM ,Qt multi‐thread technology is applied in the system to achieve real‐time image display and improve the efficiency of image processing .ARM Cortex — A8 (S5PV210) is as the core to build the hardware platform ,builds a Linux embedded operating system environment ,design video image capture process based on V4L2 interface ,uses Qtmulti‐thread technology write graphical applications tocapture ,display ,storage and process of image .This system has small vol‐ume ,low power consumption ,low cost ,fast speed ,strong commonality ,can be used in many field of the embedded image processing .

  4. A hybrid BMI-based exoskeleton for paresis: EMG control for assisting arm movements

    Science.gov (United States)

    Kawase, Toshihiro; Sakurada, Takeshi; Koike, Yasuharu; Kansaku, Kenji

    2017-02-01

    Objective. Brain-machine interface (BMI) technologies have succeeded in controlling robotic exoskeletons, enabling some paralyzed people to control their own arms and hands. We have developed an exoskeleton asynchronously controlled by EEG signals. In this study, to enable real-time control of the exoskeleton for paresis, we developed a hybrid system with EEG and EMG signals, and the EMG signals were used to estimate its joint angles. Approach. Eleven able-bodied subjects and two patients with upper cervical spinal cord injuries (SCIs) performed hand and arm movements, and the angles of the metacarpophalangeal (MP) joint of the index finger, wrist, and elbow were estimated from EMG signals using a formula that we derived to calculate joint angles from EMG signals, based on a musculoskeletal model. The formula was exploited to control the elbow of the exoskeleton after automatic adjustments. Four able-bodied subjects and a patient with upper cervical SCI wore an exoskeleton controlled using EMG signals and were required to perform hand and arm movements to carry and release a ball. Main results. Estimated angles of the MP joints of index fingers, wrists, and elbows were correlated well with the measured angles in 11 able-bodied subjects (correlation coefficients were 0.81  ±  0.09, 0.85  ±  0.09, and 0.76  ±  0.13, respectively) and the patients (e.g. 0.91  ±  0.01 in the elbow of a patient). Four able-bodied subjects successfully positioned their arms to adequate angles by extending their elbows and a joint of the exoskeleton, with root-mean-square errors  BMI-based exoskeleton for paralyzed arms and hands using real-time control was realized by designing a new method to estimate joint angles based on EMG signals, and these may be useful for practical rehabilitation and the support of daily actions.

  5. Self-Administered, Home-Based SMART (Sensorimotor Active Rehabilitation Training) Arm Training: A Single-Case Report.

    Science.gov (United States)

    Hayward, Kathryn S; Neibling, Bridee A; Barker, Ruth N

    2015-01-01

    This single-case, mixed-method study explored the feasibility of self-administered, home-based SMART (sensorimotor active rehabilitation training) Arm training for a 57-yr-old man with severe upper-limb disability after a right frontoparietal hemorrhagic stroke 9 mo earlier. Over 4 wk of self-administered, home-based SMART Arm training, the participant completed 2,100 repetitions unassisted. His wife provided support for equipment set-up and training progressions. Clinically meaningful improvements in arm impairment (strength), activity (arm and hand tasks), and participation (use of arm in everyday tasks) occurred after training (at 4 wk) and at follow-up (at 16 wk). Areas for refinement of SMART Arm training derived from thematic analysis of the participant's and researchers' journals focused on enabling independence, ensuring home and user friendliness, maintaining the motivation to persevere, progressing toward everyday tasks, and integrating practice into daily routine. These findings suggest that further investigation of self-administered, home-based SMART Arm training is warranted for people with stroke who have severe upper-limb disability.

  6. Solar panel sun-tracking system based on ARM%基于ARM920T的太阳能电池板自动追光系统

    Institute of Scientific and Technical Information of China (English)

    郭文川; 周超超; 刘兴林; 夏田俊

    2012-01-01

    An automatic solar panel light-tracking system based on ARM9 platform was designed to improve the efficiency of solar panels. S3C2440 was used as the controller of the system. Based on the current outputs of the 2D positional sensitive detector (PSD), the directions and angels at which the horizontal and vertical axes should rotated, respectively, were calculated. Two step motors were used to control the two-axis system to trace sun position automatically. Running test shows that the system is stable and reliable, and it has good application prospect.%为了提高太阳能电池板的工作效率,设计了一种基于ARM920T平台的太阳能电池板自动追光系统.系统以ARM920T内核S3C2440处理器为控制器,根据二维光位置敏感探测器PSD的电流输出量确定电池板绕竖直轴和水平轴转动的方向和角度,进而由2个步进电机驱动双轴跟踪系统,以达到自动追光的目的.经测试表明,该系统运行稳定、可靠,具有良好的应用前景.

  7. Design of Embedded Industrial Wireless Gateway Based on ARM 9%基于ARM9的嵌入式工业无线网关设计

    Institute of Scientific and Technical Information of China (English)

    宋兴儒; 凌志浩

    2012-01-01

    介绍了一种基于ARM9处理器和嵌入式Linux操作系统的工业无线网关的设计方案。网关系统的硬件平台以ARM920T核处理器S3C2440为主处理器,采用无线通讯协议建立工业设备网络,提出了一种基于无线网关的工业通信异构网络互联方式,详细介绍了系统的软硬件设计及工作原理。%Design of an industrial wireless gateway based on ARM 9 and embedded Linux operating system is presented.An S3C2440 is used as the central processor in the gateway hardware.The wireless communication protocol is used to build an industrial equipment network.A heterogeneous network interconnection approach for industrial communication is proposed based on wireless gateway,and the system's hardware and software design and operating principle are described in detail.

  8. [Wearable Medical Devices' MCU Selection Analysis Based on the ARM Cortex-MO+ Architecture].

    Science.gov (United States)

    Wu, Zaoquan; Liu, Mengxing; Qin, Liping; Ye, Shuming; Chen, Hang

    2015-03-01

    According to the characteristics of low cost, high performance, high integration and long battery life of wearable medical devices, the mainstream low-power microcontroller(MCU) series were compared, and came to the conclusion that the MCU series based on ARM Cortex-M0+ architecture were suitable for the development of wearable medical devices. In aspects of power consumption, operational performance, integrated peripherals and cost, the MCU series based on Cortex-M0+ architecture of primary semiconductor companies were compared, aimed at providing the guides of MCU selection for wearable medical devices.

  9. A real-time SOC estimation method of LiFePO4 Li-ion battery based on LPV model%基于LPV模型的磷酸铁锂电池SOC实时算法

    Institute of Scientific and Technical Information of China (English)

    郑燕萍; 杜政平; 吴松松; 陈宁

    2014-01-01

    The state of charge(SOC) of power battery takes an important role in the control strategy and battery management of electric vehicle .Firstly ,taking LiFePO4 Li-ion battery as the research ob-ject ,a novel real-time SOC estimation method based on linear parameter-varying(LPV) model is pro-posed .Secondly ,the battery equivalent circuit model is established by the battery performance test , and the nonlinear system of battery is converted to LPV system in which the state space matrix is a function of battery’s measurable variable .And the filter algorithm is designed to achieve real-time SOC estimation of LiFePO4 Li-ion battery .Finally ,the simulation model is established in Matlab and the results verify the feasibility and accuracy of the proposed method .%动力电池荷电状态(SOC)值是电动汽车整车控制策略和电池管理系统中的一个重要参数。文章以磷酸铁锂动力电池为研究对象,提出基于线性变参数(L PV )模型的电池SOC实时估算方法。该方法在电池特性试验研究的基础上,建立电池等效电路模型,将电池非线性系统转换为L PV系统,将其状态空间系数矩阵作为电池可测量的函数,设计滤波器算法,实现磷酸铁锂动力电池SOC的实时估算。利用M atlab软件建立该算法的仿真模型,仿真结果验证了SOC实时估算方法的可行性和准确性。

  10. A low cost virtual reality system for home based rehabilitation of the arm following stroke: A randomised controlled feasibility trial

    OpenAIRE

    Standen, P.; Threapleton, K; Richardson, A; Connell, L; Brown, D.; Battersby, S; Platts, F; Burton, A

    2016-01-01

    Objective: To assess the feasibility of conducting a randomised controlled trial of a home-based virtual reality system for rehabilitation of the arm following stroke. Design: Two group feasibility randomised controlled trial of intervention versus usual care. Setting: Patients’ homes. Participants: Patients aged 18 or over, with residual arm dysfunction following stroke and, no longer receiving any other intensive rehabilitation. Interventions: Eight weeks’ use of a low cost home-based virtu...

  11. A behavior-based inverse kinematics algorithm to predict arm prehension postures for computer-aided ergonomic evaluation.

    Science.gov (United States)

    Wang, X

    1999-05-01

    In this paper, the computational problem of inverse kinematics of arm prehension movements was investigated. How motions of each joint involved in arm movements can be used to control the end-effector (hand) position and orientation was first examined. It is shown that the inverse kinematics problem due to the kinematic redundancy in joint space is ill-posed only at the control of hand orientation but not at the control of hand position. Based upon this analysis, a previously proposed inverse kinematics algorithm (Wang et Verriest, 1998a) to predict arm reach postures was extended to a seven-DOF arm model to predict arm prehension postures using a separate control of hand position and orientation. The algorithm can be either in rule-based form or by optimization through appropriate choice of weight coefficients. Compared to the algebraic inverse kinematics algorithm, the proposed algorithm can handle the non-linearity of joint limits in a straightforward way. In addition, no matrix inverse calculation is needed, thus avoiding the stability and convergence problems often occurring near a singularity of the Jacobian. Since an end-effector motion-oriented method is used to describe joint movements, observed behaviors of arm movements can be easily implemented in the algorithm. The proposed algorithm provides a general frame for arm postural control and can be used as an efficient postural manipulation tool for computer-aided ergonomic evaluation.

  12. 基于RBF神经网络的软测量算法的SoC实现%Implementation of SoC of soft measurement algorithm based on RBF neural network

    Institute of Scientific and Technical Information of China (English)

    朱懿峰; 宋执环

    2011-01-01

    An algorithm of RBF neural network soft measurement based on SoC is proposed. The entire training and prediction algorithms are implemented successfully on the hardware platform of dual-core SoC processor. In order to apply algorithm effectively on the platform whose compute speed and memory are limited,specific solutions about the structure of the network, weight update pattern and step and data preprocessing mode is proposed. The data set test results prove that the algorithm transplantation method satisfies the requirements of industrial application,which has a variety of advantages such as portable,low-cost and extensible.%提出了一种面向片上系统(SoC)的RBF神经网络的软测量算法,在OMAP-L137双核处理器SoC 硬件平台上成功实现了整个训练与预测算法.针对SoC计算速度和存储空间等资源有限,对网络结构、权值更新模式和步长以及数据预处理方式等参数提出了具体的解决方案.经过相关数据集的测试结果表明:提出的算法移植方法完全满足工业应用的要求,且具有便携性、低成本、可扩展等多种优点.

  13. 基于ARM7的RFID读写器硬件系统设计%Design of RFID Read-Write Hardware System Based on ARM7

    Institute of Scientific and Technical Information of China (English)

    仲芳强; 张亚君

    2011-01-01

    介绍一种通用的基于ARM7的13.56MHZ RFID读写器硬件系统设计过程.该系统通过LPC2364(ARM7)对MFRC500射频识别芯片进行驱动和控制,利用DM161A芯片与PC机进行网络通信和传输实时数据.经实践证明该系统可以读写Mifare One等射频卡,在实际情况中底层的软件和硬件不需要修改,无需了解底层的细节,方便与上位机的连接与通信,有利于进行二次开发,具有一定的通用性.该方案具有广阔的应用前景.%Introduced a universal 13.56MHz RFID reader hardware system based on ARM7 designing procession.The system uses LPC2364(ARM7)to drive and control the MFRC500 RFID IC chip and the DM9161A IC chip to communicate with the PC by the network and transfer real time data. The result of experiment shows that the system can read-write the Mifare One RFID card, facilitates the connection between PC and communications. No need to modify the firmware and hardware and just change the PC software development is conducive to the second development and has a certain universal. This design scheme has wide application future.

  14. Mach-Zehnder Interferometers with Asymmetric Modulation Arms in Applications of High Speed Silicon-on-Insulator Based Optical Switches

    Institute of Scientific and Technical Information of China (English)

    SUN Fei; YU Jin-Zhong

    2006-01-01

    @@ Modulation arms with different widths are introduced to Mach-Zehnder interferometers (MZIs) to obtain improved performance. Theoretical analysis and numerical simulation have shown that when the widths of the two arms are properly designed to achieve an inherent mπ/2 (m is an odd integer) optical phase difference between the arms, the asymmetric MZI presents higher modulation speed. Furthermore, the carrier-absorption induced divergence of insertion losses in silicon-on-insulator (SOI) based MZI optical switches can be obviously improved.

  15. SOC-Ahaccu 曲线-理解SOC 变化的关键

    Institute of Scientific and Technical Information of China (English)

    陈凯

    2016-01-01

    针对目前电池系统测试者面临的衡量BMS 的SOC 估算精度及修正策略问题,首次提出SOC-Ahaccu 曲线,作为理解分析SOC 相关问题的有效工具,并进行了深入探讨。

  16. Small-Sized Variable Stiffness Actuator Module Based on Adjustable Moment Arm

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Hongseon; Song, Jaebok [Korea Univ., Seoul (Korea, Republic of)

    2013-10-15

    In recent years, variable stiffness actuation has attracted much attention because interaction between a robot and the environment is increasingly required for various robot tasks. Several variable stiffness actuators (VSO) have been developed; however, they find limited applications owing to their size and weight. For realizing their widespread use, we developed a compact and lightweight mini-VSO. The mini-VSO consists of a control module based on an adjustable moment arm mechanism and a drive module with two motors. By controlling the relative motion of cams in the control module, the position and stiffness can be simultaneously controlled. Experimental results are presented to show its ability to change stiffness.

  17. Treating fibromyalgia with mindfulness-based stress reduction: results from a 3-armed randomized controlled trial.

    Science.gov (United States)

    Schmidt, Stefan; Grossman, Paul; Schwarzer, Barbara; Jena, Susanne; Naumann, Johannes; Walach, Harald

    2011-02-01

    Mindfulness-based stress reduction (MBSR) is a structured 8-week group program teaching mindfulness meditation and mindful yoga exercises. MBSR aims to help participants develop nonjudgmental awareness of moment-to-moment experience. Fibromyalgia is a clinical syndrome with chronic pain, fatigue, and insomnia as major symptoms. Efficacy of MBSR for enhanced well-being of fibromyalgia patients was investigated in a 3-armed trial, which was a follow-up to an earlier quasi-randomized investigation. A total of 177 female patients were randomized to one of the following: (1) MBSR, (2) an active control procedure controlling for nonspecific effects of MBSR, or (3) a wait list. The major outcome was health-related quality of life (HRQoL) 2 months post-treatment. Secondary outcomes were disorder-specific quality of life, depression, pain, anxiety, somatic complaints, and a proposed index of mindfulness. Of the patients, 82% completed the study. There were no significant differences between groups on primary outcome, but patients overall improved in HRQoL at short-term follow-up (P=0.004). Post hoc analyses showed that only MBSR manifested a significant pre-to-post-intervention improvement in HRQoL (P=0.02). Furthermore, multivariate analysis of secondary measures indicated modest benefits for MBSR patients. MBSR yielded significant pre-to-post-intervention improvements in 6 of 8 secondary outcome variables, the active control in 3, and the wait list in 2. In conclusion, primary outcome analyses did not support the efficacy of MBSR in fibromyalgia, although patients in the MBSR arm appeared to benefit most. Effect sizes were small compared to the earlier, quasi-randomized investigation. Several methodological aspects are discussed, e.g., patient burden, treatment preference and motivation, that may provide explanations for differences. In a 3-armed randomized controlled trial in female patients suffering from fibromyalgia, patients benefited modestly from a mindfulness-based

  18. DESIGN OF ARM BASED REAL TIME PERSONNEL MONITORING SYSTEM USING WI-FI TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Rekha George

    2013-01-01

    Full Text Available Nowadays we constantly come across the need to transfer remote data to monitor center which will be far away from the place of data acquisition. Traditional data acquisition system using wires cannot satisfy these requirements due to its heavy cost and impracticability. Embedded devices with network communication which makes it more powerful and easier to monitor and control remote data, is one of the major outcomes of the developments in the field of communication and networking technologies. This study presents the design of a real time personnel monitoring system based on wireless technology. ARM embedded processor and Wi-Fi module are used as hardware platform in this project. Data transfer over the wireless network is based on the TCP/IP protocol which is a part of the Wi-Fi module. Using this designed system an officer can monitor the personnel in the organization by opening a web page from a place that is geographically far. This system is based on the conversion of serial to wireless data which could be transferred over the wireless network to the server and also over the internet. At the completion of the design, the result shows that data is transferred between the ARM processor and the host system using the wireless network.

  19. Contrasting effects of deep ploughing of croplands and forests on SOC stocks and SOC bioavailability

    Science.gov (United States)

    Alcántara, Viridiana; Don, Axel; Vesterdal, Lars; Well, Reinhard; Nieder, Rolf

    2016-04-01

    Subsoils are essential within the global C cycle since they have a high soil organic carbon (SOC) storage capacity due to a high SOC saturation deficit. However, measures for enhancing SOC stocks commonly focus on topsoils. We assessed the long-term stability of topsoil SOC buried in cropland and forest subsoils by deep ploughing. Deep ploughing was promoted until the 1970s for breaking up hardpan and improving soil structure to optimize crop growth conditions. In forests deep ploughing is performed as a site preparation measure for afforestation of sandy soil aiming at increasing water availability in deeper layers and decreasing weed competition by burial of seeds. An effect of deep ploughing was the translocation of topsoil SOC into subsoils, with a concomitant mixing of SOC-poor subsoil material into the "new" topsoil horizon. Deep ploughed croplands and forests represent unique long-term "in-situ incubations" of SOC-rich material in subsoils in order to assess the effect of soil depth on SOC turnover. In this study, we sampled soil from five loamy and five sandy cropland sites as well as from five sandy forest sites, which were ploughed to 55-127 cm depth 25 to 53 years ago. Adjacent, equally managed but conventionally ploughed or not ploughed (forests) subplots were sampled as reference. On average 45 years after the deep ploughing operation, at the cropland sites, the deep ploughed soils contained 42±13 Mg ha-1 more SOC than the reference subplots down to 100 cm depth. On the contrary, at the forest sites, the SOC stocks of the deep ploughed soils contained 18±9 Mg ha-1 less SOC compared to the reference soils on average 38 years deep ploughing. These contrasting results can be explained, on the one hand, by the slower SOC accumulation in the newly formed topsoils of the deep ploughed forest soil (on average 48% lower SOC stocks in topsoil) compared to the croplands (on average 15% lower SOC stocks in topsoil). On the other hand, the buried topsoils at the

  20. SOC NANOBASED INTEGRATED WIRELESS SENSOR SYSTEM

    Directory of Open Access Journals (Sweden)

    Penghua Sun

    2014-11-01

    Full Text Available Smart nanotechnology materials have been recently utilized in sensing applications. Carbon nanotube (CNT based SoC sensor systems have potential applications in various fields, including medical, energy, consumer electronics, computers, and HVAC (heating, ventilation, and air conditioning among others. In this study, a nanotechnology multisensory system was designed and simulated using Labview Software. The mathematical models were developed for sensing three physical quantities: temperature, gas, and pressure. Four CNT groups on a chip (two for gas sensor, one for temperature, and a fourth one for pressure were utilized in order to perform sensing multiple parameters. The proposed fabrication processes and the materials used were chosen to avoid the interference of these parameters on each other when detecting one of them. The simulation results were translated into analog voltage from Labview software, transmitted via Bluetooth network, and received on desktop computers within the vicinity of the sensor system. The mathematical models and simulation results showed as high as 95% accuracy in measuring temperature, and the 5% error was caused from the interference of the surrounding gas. Within 7% change in pressure was impacted by both temperature and gas interference.

  1. Cost Modeling for SOC Modules Testing

    Directory of Open Access Journals (Sweden)

    Balwinder Singh

    2013-08-01

    Full Text Available The complexity of the system design is increasing very rapidly as the number of transistors on Integrated Circuits (IC doubles as per Moore’s law.There is big challenge of testing this complex VLSI circuit, in which whole system is integrated into a single chip called System on Chip (SOC. Cost of testing the SOC is also increasing with complexity. Cost modeling plays a vital role in reduction of test cost and time to market. This paper includes the cost modeling of the SOC Module testing which contains both analog and digital modules. The various test cost parameters and equations are considered from the previous work. The mathematical relations are developed for cost modeling to test the SOC further cost modeling equations are modeled in Graphical User Interface (GUI in MATLAB, which can be used as a cost estimation tool. A case study is done to calculate the cost of the SOC testing due to Logic Built in Self Test (LBIST and Memory Built in Self Test (MBIST. VLSI Test engineers can take the benefits of such cost estimation tools for test planning.

  2. Research and Design on Detection System of Soil Compaction Degree Based on ARM

    Directory of Open Access Journals (Sweden)

    Quanyuan Tan

    2013-05-01

    Full Text Available This study proposes detection methods of vehicular soil compaction degree based on a series of ideal conditions and GIS, which is to reflect the soil compaction degree and soil moisture through measuring the variation of acceleration amplitude of vibrating compaction wheels, in combination with the mathematical model of “vibrating drum-soil” two-degree-of-freedom vibrating system based on the analysis of the operating principle of vehicle; designs an embedded system based on ARM and modules such as the collection, processing and transmission of acceleration signals; writes application programs of system software in μC/OS-II environment; and develops a new detector of soil compaction degree. Experimental results show that this detection system can meet the requirement of comprehensive real-time monitoring for the soil compaction degree and soil moisture.

  3. Test access to deeply embedded analog terminals within an A/MS SoC

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    This paper presents a standard scalable and reconfigurable design for testability (SR DfT) in order to increase accessibility to deeply embedded A/MS cores and to limit application of costly off-chip mixed-signal testers. SR DfT is an oscillation-based wrapper compatible with digital embedded core-based SoC test methodologies. The impact of the optimized oscillation-based wrapper design on MS SoC testing is evaluated in two directions: area and test time. Experimental results are presented for several SoCs from the ITC'02 test benchmarks with inclusion of eight analog filters.

  4. Testing the SOC hypothesis for the magnetosphere

    CERN Document Server

    Watkins, N W; Chapman, S C; Dendy, R O

    2001-01-01

    As noted by Chang, the hypothesis of Self-Organised Criticality provides atheoretical framework in which the low dimensionality seen in magnetosphericindices can be combined with the scaling seen in their power spectra and therecently-observed plasma bursty bulk flows. As such, it has considerableappeal, describing the aspects of the magnetospheric fuelling:storage:releasecycle which are generic to slowly-driven, interaction-dominated, thresholdedsystems rather than unique to the magnetosphere. In consequence, several recentnumerical "sandpile" algorithms have been used with a view to comparison withmagnetospheric observables. However, demonstration of SOC in the magnetospherewill require further work in the definition of a set of observable propertieswhich are the unique "fingerprint" of SOC. This is because, for example, ascale-free power spectrum admits several possible explanations other than SOC. A more subtle problem is important for both simulations and data analysiswhen dealing with multiscale and hen...

  5. Selection of key terrain attributes for SOC model

    DEFF Research Database (Denmark)

    Greve, Mogens Humlekrog; Adhikari, Kabindra; Chellasamy, Menaka

    was selected, total 2,514,820 data mining models were constructed by 71 differences grid from 12m to 2304m and 22 attributes, 21 attributes derived by DTM and the original elevation. Relative importance and usage of each attributes in every model were calculated. Comprehensive impact rates of each attribute...... (standh) are the first three key terrain attributes in 5-attributes-model in all resolutions, the rest 2 of 5 attributes are Normal High (NormalH) and Valley Depth (Vall_depth) at the resolution finer than 40m, and Elevation and Channel Base (Chnl_base) coarser than 40m. The models at pixels size at 88m......As an important component of the global carbon pool, soil organic carbon (SOC) plays an important role in the global carbon cycle. SOC pool is the basic information to carry out global warming research, and needs to sustainable use of land resources. Digital terrain attributes are often use...

  6. Design of an ARM-based Automatic Rice-Selling Machine for Cafeterias

    Directory of Open Access Journals (Sweden)

    Zhiliang Kang

    2016-02-01

    Full Text Available To address the problems of low selling efficiency, poor sanitation conditions, labor-intensive requirement, and quick rice cooling speed in manual rice selling in cafeterias, especially in colleges and secondary schools, this paper presented an Advanced RISC Machines (ARM microprocessor-based rice-selling machine for cafeterias. The machines consisted of a funnel-shaped rice bin, a thermal insulation box, and a conveying and scattering mechanism. Moreover, this machine exerts fuzzy control over stepper motor rpm, and the motor drives the conveyor belt with a scraper to scatter rice, deliver it, and keep it warm. Apart from an external 4*4 keyboard, a point of sale (POS machine, an ARM process and a pressure sensor, the machine is also equipped with card swiping and weighting mechanisms to achieve functions of card swiping payment and precise measurement, respectively. In addition, detection of the right amount of rice and the alarm function are achieved using an ultrasonic sensor and a beeper, respectively. The presence of the rice container on the rice outlet is detected by an optoelectronic switch. Results show that this rice-selling machine achieves precise measurement, quick card swiping, fast rice selling, stable operation, and good rice heat preservation. Therefore, the mechanical design enables the machine to achieve its goals.

  7. Study on New Smart Transformer Terminal Unit Based on ARM and GPRS Network

    Directory of Open Access Journals (Sweden)

    Na Wu

    2013-12-01

    Full Text Available Distribution transformer is one of the most important power equipments in distribution network, whose running state exercises a great influence on the stability of the network. Transformer Terminal Unit (TTU is an effective device to monitor the running state of transformers in the distribution automation system. In this paper, we study a new smart TTU which uses ARM7 series chip as processor, equipped with ATT7022B based electric meter module and GPRS module for remote data transmission control. We focus on the corresponding hardware, software design and the measurement principle of harmonics of TTU. The new TTU can measure the electric parameters of the distribution transformer precisely. Taking advantage of the powerful ARM processor, it can analyze harmonic of the power line effectively. Due to the always-on-line feature of GPRS, TTU can achieve reliable communication with the remote terminal and the master station. Compared with other similar units, the new unit outperforms in terms of real-time, precision and reliability, which can fully meet with the high-speed development of distribution automation system.

  8. [The organizational bases for the building of a modern medical support system for the Armed Forces].

    Science.gov (United States)

    Chizh, I M

    1996-01-01

    In the article the problems concerning characteristic features of the local wars and armed conflicts, organization bases of construction of The Army and Fleet medical support modern system are discussed. The organization of personnel medical security is considered depending on the duration, intensity and spatial scope of military conflict, peculiarities of group (forces) application and ways of military actions conduction. The distribution of federal troops sanitary losses during the war in Chechenskaya Republic is shown depending on the type, localization and degree of injuries gravity as well as volume of the wounded and invalids evacuation by air transport and work of military medical institutions. The following principles of construction of the Armed Forces medical support system are formulated: The system must be in compliance with troops goals, structure, strategy and tactics, its specificity; development of medical security forms and methods, their historicism; interdependency, completeness and integrity of the system's elements; territorial aspects of its construction and management optimization. Considering character of the goals being laid on the Mobile Forces the paramount importance is attached to the level of readiness of medical service and its formations and units to act in crisis situations.

  9. Improved quasi PR droop control of charging station with PV energy storage based on SOC%光储式充电站基于SOC的改进型准PR下垂控制研究

    Institute of Scientific and Technical Information of China (English)

    程启明; 陈根; 程尹曼; 郭凯; 黄伟; 徐聪

    2016-01-01

    针对光储式电动汽车充电站以DG形式接入微电网的情况,提出了一种基于SOC的改进型功率耦合下垂控制,在系统孤岛运行时,能根据充电站储能系统SOC的变化,改善充电站与其他DG之间的功率分配;在微电网并网/孤岛双模式切换时,结合相应的并网输出功率的改变和预同步控制,来实现双模式切换的平滑过渡。在逆变器的双环控制中,电压外环采用准PR控制,电流内环采用比例P控制,实现对参考信号的快速跟踪和无差控制。最后,基于MATLAB/Simulink针对不同工况对控制策略进行了对比研究,仿真结果表明,所提出的改进型下垂控制能实现充电站向电网方向放电的灵活有效控制。%In the situation of the photovoltaic-energy-storage electric vehicle ( EV) charging station con-nected into the power micro grid as a distributed generation(DG), a power coupling based on state-of-charge ( SOC) improved droop control was proposed, which improves power allocation within charging stations and other DGs according to the SOC change of the charging station, with system running in a lonely island mode; switching in micro grid on-grid and off-grid dual modes, smooth transition realized combined with the corresponding change of on-grid power output under PQ control and pre-synchroniza-tion of droop control. Quasi PR control used to track the reference signal fast and no errors for voltage in-side controller. Finally, based on MATLAB/Simulink, the improved droop control was carried on the contrast research in different situations, and the simulation results of which verify feasibility and validity of control strategy.

  10. Design and Application of Embedded System Based on ARM7 LPC2104 Processor in Telemedicine.

    Science.gov (United States)

    Miao, Ya-Lin; Miao, Xiang-Lin; Bian, Zheng-Zhong; Zhang, Yong-Jie

    2005-01-01

    This paper, based on ARM7 processor and real-time embedded operating system (μC/OS-II), establishes an embedded telemedicine platform ground on LPC2104 and realizes some very popular embedded application technologies such as USB communication, embedded Internet communication, infrared communication, etc. Meanwhile the volume of the hardware is smaller; power consumption is lower; the functions are mightier and the expansibility is stronger. In addition, for the embedded real-time μC/OS-II in use has gone through the reliability authentication, the whole running system is more stable and the program maintenance and update is more convenient. The telemedicine system based on this technology has been tested to be stable and efficient, and has obtained the results as expected.

  11. The sense of coherence (SOC) as an important determinant of life satisfaction, based on own research, and exemplified by the students of University of the Third Age (U3A).

    Science.gov (United States)

    Zielińska-Więczkowska, Halina; Ciemnoczołowski, Waldemar; Kędziora-Kornatowska, Kornelia; Muszalik, Marta

    2012-01-01

    The SOC is an important determinant of life satisfaction of elderly people. It determines the level of coping with various difficult situations, which accompany an old age stage. The aim of the study was to determine the connection between the SOC levels and life satisfaction among the U3A students. Another analyzed relationship was the SOC level against the background of socio-demographic factors. The study comprised 257 students of the U3A in Poland, located in the city of Bydgoszcz. The study group consisted of 237 women and 20 men, at the average age of 64.54 ± 6.01 years. The vast majority of the study group included individuals at the secondary education level, as well as married individuals. Just over half of the group claimed to be in good health, and have no afflictions. All of the respondents were fully mobile. The study was conducted with the diagnostic poll method, using the standardized questionnaires: The Scale SOC-29, WHOQOL-Bref, and the Geriatric Depression Scale (GDS-bref version). The average value of global SOC was 128.77; the standard deviation 21.04; discrepancy 153 (minimum 50 and maximum 203). The SOC indicated significant relationship with quality of life (QoL) in the mental domain, social relationships, and environmental domain; no significant correlation in the physical domain was observed. The QOL reached about 70% of maximum result value, showing equal levels in its specific areas. A moderately decreasing (r=-0.375, pSOC values and depression occurrence, as well as its non-existence was shown in the study. Individual SOC components were also negatively correlated with depression. Another observation was weak correlation between the sense of coherence and the individuals' level of education. No statistically significant effect of age, gender and marital status on the SOC levels of U3A students was found. Higher parameters of SOC and level of education shape significantly higher effects of life satisfaction, and result in better

  12. Design of H. 264 Video Decoder SoC Based on OpenRISC1200%基于OpenRISC1200的H.264视频解码器片上系统设计

    Institute of Scientific and Technical Information of China (English)

    杨媛; 冯谋朝; 高勇; 刘宏泰

    2011-01-01

    For its high compression ratio and high image quality, the next-generation compression standard H. 264 is much favorite, and integrating H. 264 into SoC (System on chip) has become an inevitable trend. Based on open source free 32 bit OpenRISC1200 CPU, a H. 264 decoder SoC system is designed. In the system OpenRISC1200 is acted as the core control module,all other peripheral modules, including H. 264 decoder modules, JTAG module, UART modules,DMA module, SDRAM, FL ASH module communicate with CPU through the on-chip Wishbone bus. In the hardware and software co-design, the reading, decoding and format conversion of H.264 video images are carried out, and the video images are displayed on CRT with VGA interfacefinally. The hardware and software co-verification of the system is realized in Altera's FPGA EP2C70F672 on, and the experiment results show that the system can achieve 30 f/s QCIF format video image real-time decoding requirement.%新一代的压缩标准H.264以其高压缩率与高图像质量而备受青睐,将H.264集成于SoC(片上系统Sys-tern on chip)已成为必然的发展趋势.基于开源免费的32位OpenRISC1200 CPU,设计了H.264解码器SoC系统,系统以OpenRISC1200为核心控制模块,其他所有外围模块包括H.264解码器模块、JTAG模块、UART模块、DMA模块、SDRAM、FLASH模块等均通过Wishbone片上总线与CPU通信.在软硬件的协同工作下,系统完成H.264视频图像的读取、解码和格式转换,最后通过VGA接口在CRT显示器上进行视频图像的显示.所设计的系统在Altera公司的FPGA EP2C70F672上进行了软硬件的协同验证,结果表明系统可以达到30 f/s的QCIF格式视频图像实时解码要求.

  13. Design of multi-ports mobile monitoring system based on ARM-Linux%基于ARM-Linux的多端口移动监测系统设计

    Institute of Scientific and Technical Information of China (English)

    李昶; 翟开元

    2011-01-01

    Multi - ports mobile monitoring system based on ARM-Linux is designed, composing of the hardware and software. The hardware adopts embedded microprocessor PXA270 as the core, the software realizes transport of the monitoring data and video streaming through TCP and Modbus protocol, Socket network programming. The system has better operational efficiency than the traditional monitoring system,realizing multi - stations and mobile monitoring.%设计了基于ARM-Linux的多端口监测和移动视频监控系统.系统由硬件和软件两部分组成,硬件采用嵌入式微控制器PXA270为核心,软件采用,TCP和Modbus协议以及Socket网络编程实现监测数据和视频流的传输.该系统比传统的数据监测系统具有更高的运行效率,可实现多工位、移动式监控.

  14. 基于ARM9的野外探测设备设计%Design of Outdoors Exploring Device based on ARM9

    Institute of Scientific and Technical Information of China (English)

    赵元苏

    2011-01-01

    为了让机器可以代替人类在危险地带工作,介绍了一种基于ARM9芯片(S3C2440),使用传感器、USB摄像头、无线网卡等外设,搭建出可被遥控的、能将采集到的视频数据通过无线网络传回的移动平台。嵌入式操作系统采用Linux,应用程序编程语言使用C语言。%To make machine working in dangerous area instead of human being, this papers based on ARM9 embedded chip assembled with peripheral equipment, such as sensor, USB camera, wireless adapter, and so on, builds a removable platform that could be remote and transmit video flow back to control center through the wireless Internet. The embedded operating system is Linux, and C language is used to program.

  15. Realization of USB-HOST Drive in CNC System Based on ARM9%基于ARM9的CNC系统USB-HOST驱动实现

    Institute of Scientific and Technical Information of China (English)

    董海涛; 谢经明; 陈冰; 陈幼平

    2011-01-01

    以USB 1.1版本协议和OHCI 1.0版本协议为基础,开发了基于ARM9( EP9315)处理器的USB-HOST的驱动程序.该系统同时支持FAT16和FAT32文件系统,已成功应用于广州数控GSK928TEa及GSK928TCa的CNC系统,实现了工业化生产并推向市场.实践证明:该系统性能稳定可靠,通用性强,方便移植于其他平台.%This paper designed an USB-HOST drive program based on ARM9 micrprocessor EP9315 according to USB1.1 version and OHCI1.0 specification. This system supported FAT16 and FAT32 file system,and applied GSK928TEa and GSK928TCa CNC system successfully in GSK CNC EQUIPMENT CO. ,LTD. This CNC system was industrialized and put into production. Practice result proves that this system has stable and reliable performance,good generality,and can transplant to other platform conveniently.

  16. Dysregulation of SOCS-Mediated Negative Feedback of Cytokine Signaling in Carcinogenesis and Its Significance in Cancer Treatment

    Science.gov (United States)

    Jiang, Mengmeng; Zhang, Wen-wen; Liu, Pengpeng; Yu, Wenwen; Liu, Ting; Yu, Jinpu

    2017-01-01

    Suppressor of cytokine signaling (SOCS) proteins are major negative feedback regulators of cytokine signaling mediated by the Janus kinase (JAK)-signal transducer and activator of transcription signaling pathway. In particular, SOCS1 and SOCS3 are strong inhibitors of JAKs and can play pivotal roles in the development and progression of cancers. The abnormal expression of SOCS1 and SOCS3 in cancer cells is associated with the dysregulation of cell growth, migration, and death induced by multiple cytokines and hormones in human carcinomas. In addition, the mechanisms involved in SOCS1- and SOCS3-regulated abnormal development and activation of immune cells in carcinogenesis, including T cells, macrophages, dendritic cells, and myeloid-derived suppressor cells, are still unclear. Therefore, this study aims to further discuss the molecules and signal pathways regulating the expression and function of SOCS1 and SOCS3 in various types of cancers and elucidate the feasibility and efficiency of SOCS-based target therapeutic strategy in anticancer treatment. PMID:28228755

  17. Discrete wavelet transform-based fault diagnosis for driving system of pipeline detection robot arm

    Institute of Scientific and Technical Information of China (English)

    Deng Huiyu; Wang Xinli; Ma Peisun

    2005-01-01

    A real-time wavelet multi-resolution analysis (MRA)-based fault detection algorithm is proposed. The first stage detailed MRA signals extracted from the original signals were used as the criteria for fault detection. By measuring sharp variations in the detailed MRA signals, faults in the motor driving system of pipeline detection robot arm could be detected. The fault type was then identified by comparison of the three-phase MRA sharp variations. The effects of the faults were examined. The simulation results show that this algorithm is effective and robust, it is promising for fault detection in a robot's joint driving system. The method is simple, rapid and it can operate in real time.

  18. Concise Arm and Hand Rehabilitation Approach in Stroke (CARAS: A practical and evidence-based framework for clinical rehabilitation management

    Directory of Open Access Journals (Sweden)

    Johan A. Franck

    2015-10-01

    Full Text Available The volume of information on new treatment techniques supporting the restoration of arm-hand function (AHF and arm-hand skill performance (ASHP in stroke survivors overwhelms therapists in everyday clinical practice when choosing the appropriate therapy. The Concise Arm and Hand Rehabilitation Approach in Stroke (CARAS is designed for paramedical staff to structure and implement training of AHF and AHSP in stroke survivors. The CARAS is based on four constructs: (a stratification according to the severity of arm–hand impairment (using the Utrecht Arm/Hand -Test [UAT], (b the individual’s rehabilitation goals and concomitant potential rehabilitation outcomes, (c principles of self-efficacy, and (d possibilities to systematically incorporate (new technology and new evidence-based training elements swiftly. The framework encompasses three programs aimed at treating either the severely (UAT 0-1, moderately (UAT 2-3, or mildly (UAT 4-7 impaired arm-hand. Program themes are: taking care of the limb and prevention of complications (Program 1, task-oriented gross motor grip performance (Program 2, and functional AHSP training (Program 3. Each program is preceded and followed by an assessment. Training modularity facilitates rapid interchange/adaptation of sub-elements. Proof-of-principle in clinical rehabilitation has been established. The CARAS facilitates rapid structured design and provision of state-of-the-art AHF and ASHP treatment in stroke patients.

  19. Molecular characterization of two suppressor of cytokine signaling 1 genes (SOCS1a and SOCS1b in chickens

    Directory of Open Access Journals (Sweden)

    Xue XU,Jiannan ZHANG,Juan LI,Yajun WANG

    2015-03-01

    Full Text Available Suppressor of cytokine signaling 1 (SOCS1 protein can inhibit the signal transduction triggered by some cytokines or hormones and thus are important in many physiological/pathological processes, including innate and adaptive immunity, inflammation, and development in mammals. However, there is sparse information about their structure, tissue expression, in birds, where their biological functions remain unknown. In this study, we cloned and characterized two SOCS1 genes (named cSOCS1a and cSOCS1b from chickens. SOCS1a is predicted to encode a 207-amino acid protein, which shares high amino acid sequence identity (64%–67% with human and mouse SOCS1. Besides SOCS1a, a novel SOCS1b gene was also identified in chickens and other non-mammalian vertebrates including Xenopus tropicalis. Chicken SOCS1b is predicted to encode a 212-amino acid protein, which shares only 30%–32% amino acid sequence identity with human SOCS1 and cSOCS1a. RT-PCR assay revealed that both cSOCS1a and cSOCS1b are widely expressed in all chicken tissues. Using a luciferase reporter assay system, we further demonstrated that transient expression of cSOCS1a and cSOCS1b can significantly inhibit chicken growth hormone (GH- or prolactin (PRL-induced luciferase activities of Hep G2 cells expressing cGH receptor (or cPRL receptor, indicating that SOCS1a and SOCS1b proteins can negatively regulate GH/PRL signaling. Taken together, these data suggest that both cSOCS1a and cSOCS1b may function as negative regulators of cytokine/hormone actions, such as modulation of GH/PRL actions in chickens.

  20. Different temporal bases for body and arm movements in volleyball serve reception

    NARCIS (Netherlands)

    Benerink, N. H.; Bootsma, R. J.; Zaal, F. T. J. M.

    2015-01-01

    In many sports, successfully intercepting a ball requires players to move both their body and their arms. Yet, studies of interception typically focus on one or the other. We performed an analysis of the moments of first foot and arm movements of elite-level volleyball players during serve reception

  1. Kinematics and control of redundant robotic arm based on dielectric elastomer actuators

    Science.gov (United States)

    Branz, Francesco; Antonello, Andrea; Carron, Andrea; Carli, Ruggero; Francesconi, Alessandro

    2015-04-01

    Soft robotics is a promising field and its application to space mechanisms could represent a breakthrough in space technologies by enabling new operative scenarios (e.g. soft manipulators, capture systems). Dielectric Elastomers Actuators have been under deep study for a number of years and have shown several advantages that could be of key importance for space applications. Among such advantages the most notable are high conversion efficiency, distributed actuation, self-sensing capability, multi-degree-of-freedom design, light weight and low cost. The big potentialities of double cone actuators have been proven in terms of good performances (i.e. stroke and force/torque), ease of manufacturing and durability. In this work the kinematic, dynamic and control design of a two-joint redundant robotic arm is presented. Two double cone actuators are assembled in series to form a two-link design. Each joint has two degrees of freedom (one rotational and one translational) for a total of four. The arm is designed to move in a 2-D environment (i.e. the horizontal plane) with 4 DoF, consequently having two degrees of redundancy. The redundancy is exploited in order to minimize the joint loads. The kinematic design with redundant Jacobian inversion is presented. The selected control algorithm is described along with the results of a number of dynamic simulations that have been executed for performance verification. Finally, an experimental setup is presented based on a flexible structure that counteracts gravity during testing in order to better emulate future zero-gravity applications.

  2. A perspective matrix-based seed reconstruction algorithm with applications to C-arm based intra-operative dosimetry

    Science.gov (United States)

    Narayanan, Sreeram; Cho, Paul S.

    2006-03-01

    Currently available seed reconstruction algorithms are based on the assumption that accurate information about the imaging geometry is known. The assumption is valid for isocentric x-ray units such as radiotherapy simulators. However, the large majority of the clinics performing prostate brachytherapy today use C-arms for which imaging parameters such as source to axis distance, image acquisition angles, central axis of the image are not accurately known. We propose a seed reconstruction algorithm that requires no such knowledge of geometry. The new algorithm makes use of perspective projection matrix, which can be easily derived from a set of known reference points. The perspective matrix calculates the transformation of a point in 3D space to the imaging coordinate system. An accurate representation of the imaging geometry can be derived from the generalized projection matrix (GPM) with eleven degrees of freedom. In this paper we show how GPM can be derived given a theoretical minimum number of reference points. We propose an algorithm to compute the line equation that defines the backprojection operation given the GPM. The algorithm can be extended to any ray-tracing based seed reconstruction algorithms. Reconstruction using the GPM does not require calibration of C-arms and the images can be acquired at arbitrary angles. The reconstruction is performed in near real-time. Our simulations show that reconstruction using GPM is robust and accuracy is independent of the source to detector distance and location of the reference points used to generate the GPM. Seed reconstruction from C-arm images acquired at unknown geometry provides a useful tool for intra-operative dosimetry in prostate brachytherapy.

  3. Stereocomplexation in Copolymer Networks Incorporating Enantiomeric Glycerol-Based 3-Armed Lactide Oligomers and a 2-Armed ɛ-Caprolactone Oligomer

    Directory of Open Access Journals (Sweden)

    Ayaka Shibita

    2016-07-01

    Full Text Available The reactions of enantiomeric glycerol-based 3-armed lactide oligomers (H3DLAO and H3LLAO and a diethylene glycol-based 2-armed ɛ-caprolactone oligomer (H2CLO with hexamethylene diisocyanate (HDI produced polyesterurethane copolymer networks (PEU-3scLAO/2CLOs 100/0, 75/25, 50/50, 25/75 and 0/100 with different feed ratios of stereocomplex (sc lactide oligomer (H3scLAO = H3DLAO + H3LLAO, H3DLAO/H3LLAO = 1/1 and H2CLO. Thermal and mechanical properties of the copolymer networks were compared with those of a simple homochiral (hc network (PEU-3DLAO produced by the reaction of H3DLAO and HDI. X-ray diffraction and differential scanning calorimetric analyses revealed that sc crystallites are formed without any hc crystallization for PEU-3scLAO/2CLOs, and that PEU-3DLAO is amorphous. The melting temperatures of sc crystallites for PEU-3scLAO/2CLOs were much higher than that of hc crystallites of H3DLAO. The polarized optical microscopic analysis revealed that the nucleation efficiency is enhanced with increasing feed of H3scLAO fraction, whereas the spherulite growth rate is accelerated with increasing feed H2CLO fraction over 100/0-50/50 networks. PEU-3scLAO/2CLO 100/0 (i.e., PEU-3scLAO exhibited a higher tensile strength and modulus than PEU-3DLAO. The elongation at break and tensile toughness for PEU-3scLAO/2CLOs increased with an increasing feed amount of H2CLO.

  4. Human-Like Behavior Generation Based on Head-Arms Model for Robot Tracking External Targets and Body Parts.

    Science.gov (United States)

    Zhang, Zhijun; Beck, Aryel; Magnenat-Thalmann, Nadia

    2015-08-01

    Facing and pointing toward moving targets is a usual and natural behavior in daily life. Social robots should be able to display such coordinated behaviors in order to interact naturally with people. For instance, a robot should be able to point and look at specific objects. This is why, a scheme to generate coordinated head-arm motion for a humanoid robot with two degrees-of-freedom for the head and seven for each arm is proposed in this paper. Specifically, a virtual plane approach is employed to generate the analytical solution of the head motion. A quadratic program (QP)-based method is exploited to formulate the coordinated dual-arm motion. To obtain the optimal solution, a simplified recurrent neural network is used to solve the QP problem. The effectiveness of the proposed scheme is demonstrated using both computer simulation and physical experiments.

  5. Comparison Study on the Battery SoC Estimation with EKF and UKF Algorithms

    Directory of Open Access Journals (Sweden)

    Hongwen He

    2013-09-01

    Full Text Available The battery state of charge (SoC, whose estimation is one of the basic functions of battery management system (BMS, is a vital input parameter in the energy management and power distribution control of electric vehicles (EVs. In this paper, two methods based on an extended Kalman filter (EKF and unscented Kalman filter (UKF, respectively, are proposed to estimate the SoC of a lithium-ion battery used in EVs. The lithium-ion battery is modeled with the Thevenin model and the model parameters are identified based on experimental data and validated with the Beijing Driving Cycle. Then space equations used for SoC estimation are established. The SoC estimation results with EKF and UKF are compared in aspects of accuracy and convergence. It is concluded that the two algorithms both perform well, while the UKF algorithm is much better with a faster convergence ability and a higher accuracy.

  6. Design & Implementation of a Low Cost Based Wireless HCI System for Disabled Persons Using ARM7

    Directory of Open Access Journals (Sweden)

    Surya Narayan Pradhan

    2014-05-01

    Full Text Available This paper focuses on design & development of a portable wireless Human Computer Interface (HCI system to create a robust hands free interface for disabled peoples or peoples having upper limb motor paralysis. Early techniques mainly considered image processing, gaze tracking and cameras to synthesis the device. We propose a new mouse as an input device for a computer whose operation is based on measurement of rotations of the user‘s head and detection of eye blinks. A tilt sensor(3-axis accelerometer is used to detect both lateral and vertical head movements to navigate the mouse cursor position placed on a helmet .The IR based eye blink sensor is placed on a spec used to detect eye blink and in turns do clicking operation. The signals are sent to the micro-controller (ARM7 LPC2148 for processing & do required operations. The wireless technology includes Zigbee module used to sends signals to the computer in use. A C# based program is developed for the mouse control operations & provides a flexible method for the disabled people to improve both personal & professional life quality.

  7. Optimization-based image reconstruction with artifact reduction in C-arm CBCT

    Science.gov (United States)

    Xia, Dan; Langan, David A.; Solomon, Stephen B.; Zhang, Zheng; Chen, Buxin; Lai, Hao; Sidky, Emil Y.; Pan, Xiaochuan

    2016-10-01

    We investigate an optimization-based reconstruction, with an emphasis on image-artifact reduction, from data collected in C-arm cone-beam computed tomography (CBCT) employed in image-guided interventional procedures. In the study, an image to be reconstructed is formulated as a solution to a convex optimization program in which a weighted data divergence is minimized subject to a constraint on the image total variation (TV); a data-derivative fidelity is introduced in the program specifically for effectively suppressing dominant, low-frequency data artifact caused by, e.g. data truncation; and the Chambolle-Pock (CP) algorithm is tailored to reconstruct an image through solving the program. Like any other reconstructions, the optimization-based reconstruction considered depends upon numerous parameters. We elucidate the parameters, illustrate their determination, and demonstrate their impact on the reconstruction. The optimization-based reconstruction, when applied to data collected from swine and patient subjects, yields images with visibly reduced artifacts in contrast to the reference reconstruction, and it also appears to exhibit a high degree of robustness against distinctively different anatomies of imaged subjects and scanning conditions of clinical significance. Knowledge and insights gained in the study may be exploited for aiding in the design of practical reconstructions of truly clinical-application utility.

  8. DMPD: An arms race: innate antiviral responses and counteracting viral strategies. [Dynamic Macrophage Pathway CSML Database

    Lifescience Database Archive (English)

    Full Text Available 18031256 An arms race: innate antiviral responses and counteracting viral strategie...s. Schroder M, Bowie AG. Biochem Soc Trans. 2007 Dec;35(Pt 6):1512-4. (.png) (.svg) (.html) (.csml) Show An arms race: innate anti...viral responses and counteracting viral strategies. PubmedID 18031256 Title An arms race: innate anti

  9. Research on the man in the loop control system of the robot arm based on gesture control

    Science.gov (United States)

    Xiao, Lifeng; Peng, Jinbao

    2017-03-01

    The Man in the loop control system of the robot arm based on gesture control research complex real-world environment, which requires the operator to continuously control and adjust the remote manipulator, as the background, completes the specific mission human in the loop entire system as the research object. This paper puts forward a kind of robot arm control system of Man in the loop based on gesture control, by robot arm control system based on gesture control and Virtual reality scene feedback to enhance immersion and integration of operator, to make operator really become a part of the whole control loop. This paper expounds how to construct a man in the loop control system of the robot arm based on gesture control. The system is a complex system of human computer cooperative control, but also people in the loop control problem areas. The new system solves the problems that the traditional method has no immersion feeling and the operation lever is unnatural, the adjustment time is long, and the data glove mode wears uncomfortable and the price is expensive.

  10. 基于ARM-Linux的滑动轴承实验系统设计%Design of Sliding Bearing Experiment System Based on ARM-Linux

    Institute of Scientific and Technical Information of China (English)

    王福刚; 曾兵; 葛良全

    2009-01-01

    Taking ARM chip as the core, developed a sliding bearing experiment system based on embedded system, for enhancing real -time performance and scientific research performance of it. replanting embedded Linux OS (Operating System) in ARM chip. The systemcomposed of core board and expansion board runs with embedded Linux Operating System and friendly GUI (Graphical User Interfaces). Its parameter can be changed dynamically and its re-development performance is fine. Uses a modular and standardized design method, and also introduces the replanting of embedded Linux OS and the development of driver and Qt/Embedded application procedures. And, the demo system has been finished with a good debugging result.%为提高滑动轴承实验系统的实时性及改善其科研性能,以ARM芯片为核心,研制了一种基于嵌入式系统的滑动轴承实验系统;系统由核心板和扩展板两部分组成,移植了嵌入式Linux操作系统,开发了友好的人机界面,可动态改变参数,二次开发性能优良;采用了模块化、标准化的硬件设计方法,介绍了嵌入式Linux的移植过程,详述了驱动程序的开发以及基于Qt/Embedded的应用程序设计;系统样机已完成,运行稳定,调试效果良好.

  11. DESIGNING COMPILATION SYSTEM OF PLC SOURCE PROGRAM BASED ON ARM-FPGA%基于 ARM-FPGA的 PLC源程序编译系统的设计

    Institute of Scientific and Technical Information of China (English)

    蒋玉新; 蔡启仲; 李克俭; 张炜

    2013-01-01

    在研究PLC程序编译执行过程和新指令特点的基础上,基于ARM-FPGA的PLC主机结构,提出一种新型PLC指令的编译方法。静态编译将指令的操作数转换为PLC软元件的直接地址,建立转移类指令的转移地址链表,编译成为新的PLC程序代码序列;动态编译在PLC程序执行过程中将新程序指令中操作数的直接地址转换为立即数,由FPGA模块执行。通过对PLC用户源程序的编译与执行,表明该方法能够充分应用FPGA高速并行处理的功能,提高了PLC程序执行的速度。%Based on the study of compilation and execution process of PLC program and the features of new instructions , we propose a novel compilation method of PLC program on a PLC platform designed by ARM-FPGA.The static compilation converts the instruction operands to direct address of PLC soft components , sets up the branch address link list of branch instructions , and the new PLC program code sequence is complied;the dynamic compilation converts the direct address of operands in new program instructions to immediate data during the execution process of PLC program and this is done by FPGA module .By compiling and executing PLC user source program , it is demonstrated that our proposed method can speed up the processing of PLC program by fully utilising the high speed parallel processing functions of FPGA.

  12. Self-reported and performance-based outcomes using DEKA Arm

    Directory of Open Access Journals (Sweden)

    Linda Resnik, PT, PhD

    2014-06-01

    Full Text Available Mechanical properties of the DEKA Arm and associated engineering innovations are easy to observe. What is less clear is how these advances translate into functional benefits for the user with amputation. Study aims were to (1 quantify outcomes including dexterity, performance of daily activities, and prosthetic skill and spontaneity of users of the DEKA Arm and (2 compare outcomes when using the DEKA Arm with scores using the existing prosthesis. This was a quasi-experimental study. Descriptive analyses examined outcomes by DEKA Arm configuration level. Of the 39 subjects fit with a DEKA Arm, 32 were trained in use and completed end-of-study testing. Data from 26 prosthetic users were used to compare outcomes using existing prostheses with outcomes with the DEKA Arm. Dexterity and activity performance with the DEKA Arm varied by amputation level (p < 0.01. Self-reported function and number of activities performed using the prosthesis were similar across levels. Comparisons with existing prostheses showed the effect on dexterity varied by level. Activity performance and spontaneity of prosthetic use improved for users of the shoulder configuration level, while use of the prosthesis to perform activities and perceived difficulty performing self-selected tasks improved for all levels.

  13. The effect of synchronized area on SOC behavior in a kind of Neural Network Model

    OpenAIRE

    Zhao, Xiao Wei; Chen, Tian Lun

    2000-01-01

    Based on the LISSOM model and the OFC earthquake model, we introduce a self-organized feature map Neural Network model . It displays a "Self Organized Criticality"(SOC) behavior. It can be seen that the feature area (synchronized area) produced by self-organized process brings about some definite effect on SOC behavior and the system evolves into a "partly-synchronized" state. For explaining this phenomena, a quasi-OFC earthquake model is simulated.

  14. 嵌入式SoC单片机在雕刻机数控系统中的应用%Engraving Machine NC Control System Based on Embedded SoC Microcontroller

    Institute of Scientific and Technical Information of China (English)

    王锁弘

    2014-01-01

    In view of the wide application of the engraving machine , an embedded SOC microcontroller con-trolled engraving machine is developed .It is of less production costs than the engraving machines based on PC or DSP.The control system block diagram with the C 8051F120 microcontroller as core processor is presented .The bas-ic theory of the line interpolation using point-by-point comparison method is discussed .The system software function is also introduced .Practical tests show that the carving accuracy is 0.01 mm.With fast carving speed , the design is of economic value .%将一台由嵌入式SoC单片机控制的雕刻机,与基于PC机或DSP的雕刻机数控系统相比,其是一种低成本的解决方案。在给出了以C8051 F120单片机为主控芯片的数控系统原理框图的基础上,进一步讨论了逐点比较法直线插补的基本原理,并对控制系统的主要软件功能作了说明。经测试运行,该系统雕刻精度达0.01 mm,且雕刻速度快,并具有一定的经济实用价值。

  15. Testing coordinate measuring arms with a geometric feature-based gauge: in situ field trials

    Science.gov (United States)

    Cuesta, E.; Alvarez, B. J.; Patiño, H.; Telenti, A.; Barreiro, J.

    2016-05-01

    This work describes in detail the definition of a procedure for calibrating and evaluating coordinate measuring arms (AACMMs or CMAs). CMAs are portable coordinate measuring machines that have been widely accepted in industry despite their sensitivity to the skill and experience of the operator in charge of the inspection task. The procedure proposed here is based on the use of a dimensional gauge that incorporates multiple geometric features, specifically designed for evaluating the measuring technique when CMAs are used, at company facilities (workshops or laboratories) and by the usual operators who handle these devices in their daily work. After establishing the procedure and manufacturing the feature-based gauge, the research project was complemented with diverse in situ field tests performed with the collaboration of companies that use these devices in their inspection tasks. Some of the results are presented here, not only comparing different operators but also comparing different companies. The knowledge extracted from these experiments has allowed the procedure to be validated, the defects of the methodologies currently used for in situ inspections to be detected, and substantial improvements for increasing the reliability of these portable instruments to be proposed.

  16. Ruler Based Automatic C-Arm Image Stitching Without Overlapping Constraint.

    Science.gov (United States)

    Chen, Cheng; Kojcev, Risto; Haschtmann, Daniel; Fekete, Tamas; Nolte, Lutz; Zheng, Guoyan

    2015-08-01

    In this paper, we propose a new method for stitching multiple fluoroscopic images taken by a C-arm instrument. We employ an X-ray radiolucent ruler with numbered graduations while acquiring the images, and the image stitching is based on detecting and matching ruler parts in the images to the corresponding parts of a virtual ruler. To achieve this goal, we first detect the regular spaced graduations on the ruler and the numbers. After graduation labeling, for each image, we have the location and the associated number for every graduation on the ruler. Then, we initialize the panoramic X-ray image with the virtual ruler, and we "paste" each image by aligning the detected ruler part on the original image, to the corresponding part of the virtual ruler on the panoramic image. Our method is based on ruler matching but without the requirement of matching similar feature points in pairwise images, and thus, we do not necessarily require overlap between the images. We tested our method on eight different datasets of X-ray images, including long bones and a complete spine. Qualitative and quantitative experiments show that our method achieves good results.

  17. [Study for lung sound acquisition module based on ARM and Linux].

    Science.gov (United States)

    Lu, Qiang; Li, Wenfeng; Zhang, Xixue; Li, Junmin; Liu, Longqing

    2011-07-01

    A acquisition module with ARM and Linux as a core was developed. This paper presents the hardware configuration and the software design. It is shown that the module can extract human lung sound reliably and effectively.

  18. Different temporal bases for body and arm movements in volleyball serve reception.

    Science.gov (United States)

    Benerink, N H; Bootsma, R J; Zaal, F T J M

    2015-10-01

    In many sports, successfully intercepting a ball requires players to move both their body and their arms. Yet, studies of interception typically focus on one or the other. We performed an analysis of the moments of first foot and arm movements of elite-level volleyball players during serve reception. Video footage of five international matches of the Netherlands men's national volleyball team allowed the systematic coding and analysis of 347 different serve reception events. For each event, we identified the time of serve (TS) and time of contact (TC). Ball flight time (from TS to TC) varied between and within types of serve (power jump serves, n = 193, and jumping float serves, n = 154). Correlation analyses revealed that foot movement was initiated with respect to time from TS, while arm movement was initiated with respect to time until TC. These results suggest that whole-body and arm movements rely on different control processes.

  19. Mapping SOC in a river catchment by integrating laboratory spectra wavelength with remote sensing spectra

    DEFF Research Database (Denmark)

    Peng, Yi; Xiong, Xiong; Knadel, Maria;

    There is potential to use soil ·-proximal and remote sensing derived spectra concomitantly to develop soil organic carbon (SOC) models. Yet mixing spectral data from different sources and technologies to improve soil models is still in its infancy. The objective of this study was to incorporate...... soil spectral features indicative of SOC from laboratory visible near-infrared reflectance (vis-NlR) spectra and incorporate them with remote sensing (RS) images to improve predictions of top SOC in the Skjem river catchment, Denmark. The secondary objective was to improve prediction results...... by separately calibrating samples from upland and wetland. We hypbthesize that final prediction accuracy is significantly improved by incorporatin1 laboratory vis-NlR images upscaled from point-based spectra to catchment scale and RS data for topsoil SOC spatial modeling....

  20. A Study on the Embedded Linux System Transplantation Based on the ARM%基于arm的嵌入式Linux系统移植探究

    Institute of Scientific and Technical Information of China (English)

    胡德清

    2013-01-01

    Linux system has open source,can be cut,free,fully supports TCP/IP protocol,portability,good operation stability etc.,ARM Linux inherited the fine characteristics.ARM9 processor has the MMU,support the general operating system virtual memory mechanism ;this makes ARM9 in running on a complete ARM Linux system possible.This paper mainly based on the ARM embedded Linux system transplantation research.%  Linux 系统具有开源、可裁减、免费、完全支持 TCP/IP 协议、可移植性好、运行稳定等特点,ARM Linux 继承了这些优良特性。ARM9处理器具有 MMU,支持一般操作系统的虚拟内存机制,这就使在 ARM9上运行一个完全的 ARM Linux 系统成为可能。本文主要基于 ARM 的嵌入式 Linux 系统移植进行研究。

  1. Real Time FPGA-Based Ethernet Control Communication for Robotic Arm

    Directory of Open Access Journals (Sweden)

    Ishak Mohamad Khairi

    2017-01-01

    Full Text Available In this paper, an approach for real time control communication using Ethernet is proposed. The strategy to support this at the network level and include Field Programmable Gate Array (FPGA implementation on the Ethernet platform for robotic arm. An embedded Ethernet controller is designed to send data packet via Ethernet Local Area Network (LAN. The transferring data also employs Arduino Mega as the medium of communication between FPGA board and the robotic arm. It is used as the receiver to receive data packet from FPGA board with the interface of Arduino Ethernet shield. The control operation on the robotic arm is performed once the desired data packet length is reached to the Arduino Mega. SolidWorks and MATLAB software are used to design the robotic arm and simulate the robotic arm working flexibility in real world respectively. The result of the average data packet delay between FPGA boards is lower in comparison to Arduiono board. The data packet can send successfully in through the network to test the robotic arm.

  2. Gesture Therapy: A Vision-Based System for Arm Rehabilitation after Stroke

    Science.gov (United States)

    Sucar, L. Enrique; Azcárate, Gildardo; Leder, Ron S.; Reinkensmeyer, David; Hernández, Jorge; Sanchez, Israel; Saucedo, Pedro

    Each year millions of people in the world survive a stroke, in the U.S. alone the figure is over 600,000 people per year. Movement impairments after stroke are typically treated with intensive, hands-on physical and occupational therapy for several weeks after the initial injury. However, due to economic pressures, stroke patients are receiving less therapy and going home sooner, so the potential benefit of the therapy is not completely realized. Thus, it is important to develop rehabilitation technology that allows individuals who had suffered a stroke to practice intensive movement training without the expense of an always-present therapist. Current solutions are too expensive, as they require a robotic system for rehabilitation. We have developed a low-cost, computer vision system that allows individuals with stroke to practice arm movement exercises at home or at the clinic, with periodic interactions with a therapist. The system integrates a web based virtual environment for facilitating repetitive movement training, with state-of-the art computer vision algorithms that track the hand of a patient and obtain its 3-D coordinates, using two inexpensive cameras and a conventional personal computer. An initial prototype of the system has been evaluated in a pilot clinical study with promising results.

  3. Sensor-based whole-arm obstacle avoidance utilizing ASIC technology

    Science.gov (United States)

    Wintenberg, A. L.; Ericson, M. N.; Babcock, S. M.; Armstrong, G. A.; Britton, C. L., Jr.; Butler, P. L.; Hamel, W. R.; Newport, D. F.

    Operation of manipulator systems in poorly defined work environments often presents a significant hazard to both the robotic assembly and the environment. In applications relating to the Environmental Restoration and Waste Management (ER&WM) Program, many of the environments are considered hazardous, both, in the structure and composition of the environment. Use of a sensing system that provides information to the manipulator control unit regarding obstacles in close proximity will provide protection against collisions. A hierarchical design and implementation of a whole-arm obstacle avoidance system is presented. The system is based on capacitive sensors configured as bracelets for proximity sensing. Each bracelet contains a number of sensor nodes and a processor for sensor node control and readout, and communications with a higher level host, common to all bracelets. The host controls the entire sensing network and communicates proximity information to the manipulator controller. The overall architecture of this system is discussed with detail on the individual system modules. Details of an application specific integrated circuit (ASIC) designed to implement the sensor node electronics are presented. Justifications for the general measurement methods and associated implementation are discussed. Additionally, the current state of development including measured data is presented.

  4. Integrated vision-based robotic arm interface for operators with upper limb mobility impairments.

    Science.gov (United States)

    Jiang, Hairong; Wachs, Juan P; Duerstock, Bradley S

    2013-06-01

    An integrated, computer vision-based system was developed to operate a commercial wheelchair-mounted robotic manipulator (WMRM). In this paper, a gesture recognition interface system developed specifically for individuals with upper-level spinal cord injuries (SCIs) was combined with object tracking and face recognition systems to be an efficient, hands-free WMRM controller. In this test system, two Kinect cameras were used synergistically to perform a variety of simple object retrieval tasks. One camera was used to interpret the hand gestures to send as commands to control the WMRM and locate the operator's face for object positioning. The other sensor was used to automatically recognize different daily living objects for test subjects to select. The gesture recognition interface incorporated hand detection, tracking and recognition algorithms to obtain a high recognition accuracy of 97.5% for an eight-gesture lexicon. An object recognition module employing Speeded Up Robust Features (SURF) algorithm was performed and recognition results were sent as a command for "coarse positioning" of the robotic arm near the selected daily living object. Automatic face detection was also provided as a shortcut for the subjects to position the objects to the face by using a WMRM. Completion time tasks were conducted to compare manual (gestures only) and semi-manual (gestures, automatic face detection and object recognition) WMRM control modes. The use of automatic face and object detection significantly increased the completion times for retrieving a variety of daily living objects.

  5. Communication Architecture Synthesis for Multi-bus SoC

    Directory of Open Access Journals (Sweden)

    Abdelkrim Zitouni

    2006-01-01

    Full Text Available In the systems on chip (SoC design, the synthesis of communication architecture constitutes the bottleneck which can affect the performances of the system. Various schemes and protocols can be necessary, just as various topologies of interconnection. To reduce the complexity of the communications refinement, we present in this study a model and a synthesis approach for multi-bus communication architecture containing centralized bridge. The automation of the arbiter synthesis step profited from a detailed attention. This stage generates a hierarchical arbiter integrating various priority arbitration modules. The proposed approach was integrated in a toolbox based environment

  6. Hardware-Software Co-Simulation for SOC Functional Verification

    Institute of Scientific and Technical Information of China (English)

    YAN Ying-jian; LIU Ming-ye

    2005-01-01

    A hardware-software co-simulation method for system on chip (SOC) design is discussed. It is based on an instruction set simulator (ISS) and an event-driven hardware simulator, and a bus interface model that is described in C language provides the interface between the two. The bus interface model and the ISS are linked into a singleton program the software simulator, which communicate with the hardware simulator through Windows sockets. The implementation of the bus interface model and the synchronization between hardware and software simulator are discussed in detail. Co-simulation control of the hardware simulator is also discussed.

  7. Sensor-based arm skill training in chronic stroke patients: results on treatment outcome, patient motivation, and system usability.

    Science.gov (United States)

    Timmermans, Annick A A; Seelen, Henk A M; Geers, Richard P J; Saini, Privender K; Winter, Stefan; te Vrugt, Juergen; Kingma, Herman

    2010-06-01

    As stroke incidence increases, therapists' time is under pressure. Technology-supported rehabilitation may offer new opportunities. The objective of this study was to evaluate patient motivation for and the feasibility and effects of a new technology-supported task-oriented arm training regime (T-TOAT). Nine chronic stroke patients performed T-TOAT (2 x 30 min/day, four days/week) during eight weeks. A system including movement tracking sensors, exercise board, and software-based toolkit was used for skill training. Measures were recorded at baseline, after four and eight weeks of training, and six months posttraining. T-TOAT improved arm-hand performance significantly on Fugl-Meyer, Action Research Arm Test, and Motor Activity Log. Training effects lasted at least six months posttraining. Health-related-quality-of-life had improved significantly after eight weeks of T-TOAT with regard to perceived physical health, but not to perceived mental health (SF-36). None of the EuroQol-5D components showed significant differences before and after training. Participants were intrinsically motivated and felt competent to use the system. Furthermore, system usability was rated very good. However, exercise challenge as perceived by participants decreased significantly over eight weeks of training. The results of this study indicate that T-TOAT is feasible. Despite the small number of stroke patients tested, significant and clinically relevant improvements in skilled arm-hand performance were found.

  8. CPU/SoC/MCU CoreSight SoC-400:可配置的调试和追踪解决方案

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    ARM公司针对复杂片上系统(SoC)设计推出高度可配置的调试和追踪解决方案ARM CoreSight SoC-400。随着多核产品的日益普及,ARM CoreSight SoC-400提供了系统解决方案,适合移动电话、平板电脑等应用。

  9. Analog circuit design for communication SOC

    CERN Document Server

    Tu, Steve Hung-Lung

    2012-01-01

    This e-book provides several state-of-the-art analog circuit design techniques. It presents both empirical and theoretical materials for system-on-a-chip (SOC) circuit design. Fundamental communication concepts are used to explain a variety of topics including data conversion (ADC, DAC, S-? oversampling data converters), clock data recovery, phase-locked loops for system timing synthesis, supply voltage regulation, power amplifier design, and mixer design. This is an excellent reference book for both circuit designers and researchers who are interested in the field of design of analog communic

  10. ARM Mentor Selection Process

    Energy Technology Data Exchange (ETDEWEB)

    Sisterson, D. L. [Argonne National Lab. (ANL), Argonne, IL (United States)

    2015-10-01

    The Atmospheric Radiation Measurement (ARM) Program was created in 1989 with funding from the U.S. Department of Energy (DOE) to develop several highly instrumented ground stations to study cloud formation processes and their influence on radiative transfer. In 2003, the ARM Program became a national scientific user facility, known as the ARM Climate Research Facility. This scientific infrastructure provides for fixed sites, mobile facilities, an aerial facility, and a data archive available for use by scientists worldwide through the ARM Climate Research Facility—a scientific user facility. The ARM Climate Research Facility currently operates more than 300 instrument systems that provide ground-based observations of the atmospheric column. To keep ARM at the forefront of climate observations, the ARM infrastructure depends heavily on instrument scientists and engineers, also known as lead mentors. Lead mentors must have an excellent understanding of in situ and remote-sensing instrumentation theory and operation and have comprehensive knowledge of critical scale-dependent atmospheric processes. They must also possess the technical and analytical skills to develop new data retrievals that provide innovative approaches for creating research-quality data sets. The ARM Climate Research Facility is seeking the best overall qualified candidate who can fulfill lead mentor requirements in a timely manner.

  11. Cache Performance Optimization for SoC Vedio Applications

    Directory of Open Access Journals (Sweden)

    Lei Li

    2014-07-01

    Full Text Available Chip Multiprocessors (CMPs are adopted by industry to deal with the speed limit of the single-processor. But memory access has become the bottleneck of the performance, especially in multimedia applications. In this paper, a set of management policies is proposed to improve the cache performance for a SoC platform of video application. By analyzing the behavior of Vedio Engine, the memory-friendly writeback and efficient prefetch policies are adopted. The experiment platform is simulated by System C with ARM Cotex-A9 processor model. Experimental study shows that the performance can be improved by the proposed mechanism in contrast to the general cache without Last Level Cache (LLC: up to 18.87% Hit Rate increased, 10.62% MM Latency and 46.43% CPU Read Latency decreased for VENC/16way/64bytes; up to 52.1% Hit Rate increased, 11.43% MM Latency and 47.48% CPU Read Latency decreased for VDEC/16way/64bytes, but with only 8.62% and 4.23% Bandwidth increased respectively

  12. Design of Programmable Automation Controller Based on ARM and Linux%基于ARM-Linux的可编程自动化控制器的设计

    Institute of Scientific and Technical Information of China (English)

    李斌; 陈富林; 李森; 王凯

    2011-01-01

    Based on the understanding of the PAC s function and programming method, a kind of PAC proto-type is discussed in detail. The main structure is introduced first, and later the operation system is deduced thor-oughly , both in hardware and software. Its hardware platform is based on a ARM board, while its software is based on linux as OS, Qt as HMI and Sqlite as database. Finally, analysis indicates that this PAC is of great scalability and portability, and can meet the industry requirements sufficiently.%在理解PAC系统的功能、组成和编程方法基础上,从整体上介绍了一种PAC的实现方案.首先对PAC总体结构作了简要介绍,然后主要对运行系统的整体构架的设计做了详细研究,包括软件及硬件系统的设计.运行系统的硬件平台是基于ARM的嵌入式控制器,软件方面使用linux作为操作系统,Qt作为界面,并支持Sqlite数据库.最后对软PLC系统的性能进行分析,分析结果表明:系统具备了良好的扩展性和移植性,达到了工业领域中的控制要求.

  13. Dynamic Structure Optimization Design of Lower Control Arm Based on ESL

    Directory of Open Access Journals (Sweden)

    Lihui Zhao

    2012-11-01

    Full Text Available Structure optimization techniques under static load conditions have been widely used in automotive industry for lightweight and performance improvement of modern cars. However, these static load conditions could not represent all the severe situations of automobile parts which subjected to complex loads varying with time, especially for lower control arm of front suspension. In this study, dynamic optimization of lower control arm was performed by combing traditional static load optimization techniques and multi-body dynamics by Equivalent Static Load (ESL. And the best draw-bead distribution of the stamped lower control arm was attained. Comparing the MBD analysis results of the new design derived from dynamic optimization and original structure, results show that the strength and stiffness was increased significantly while the mass was almost unchanged.

  14. Real-Time Discrete Adaptive Control of Robot Arm Based on Digital Signal Processing

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    A discrete model reference adaptive controller of robot arm is obtained by integrating the reduced dynamic model of robot, model reference adaptive control (MRAC) and digital signal processing (DSP) computer system into an electromechanical system. With the DSP computer system, the control signal of each joint of the robot arm can be processed in real time and independently. The simulation and experiment results show that with the control strategy, the robot achieved a good trajectory following precision, a good decoupling performance and a high real-time adaptivity.

  15. An Optimized Spline-Based Registration of a 3D CT to a Set of C-Arm Images.

    Science.gov (United States)

    Jonić, S; Thévenaz, P; Zheng, G; Nolte, L-P; Unser, M

    2006-01-01

    We have developed an algorithm for the rigid-body registration of a CT volume to a set of C-arm images. The algorithm uses a gradient-based iterative minimization of a least-squares measure of dissimilarity between the C-arm images and projections of the CT volume. To compute projections, we use a novel method for fast integration of the volume along rays. To improve robustness and speed, we take advantage of a coarse-to-fine processing of the volume/image pyramids. To compute the projections of the volume, the gradient of the dissimilarity measure, and the multiresolution data pyramids, we use a continuous image/volume model based on cubic B-splines, which ensures a high interpolation accuracy and a gradient of the dissimilarity measure that is well defined everywhere. We show the performance of our algorithm on a human spine phantom, where the true alignment is determined using a set of fiducial markers.

  16. Robust EMG sensing system based on data fusion for myoelectric control of a robotic arm

    Directory of Open Access Journals (Sweden)

    Soria Carlos M

    2009-02-01

    Full Text Available Abstract Background Myoelectric control of a robotic manipulator may be disturbed by failures due to disconnected electrodes, interface impedance changes caused by movements, problems in the recording channel and other various noise sources. To correct these problems, this paper presents two fusing techniques, Variance Weighted Average (VWA and Decentralized Kalman Filter (DKF, both based on the myoelectric signal variance as selecting criterion. Methods Tested in five volunteers, a redundant arrangement was obtained with two pairs of electrodes for each recording channel. The myoelectric signals were electronically amplified, filtered and digitalized, while the processing, fusion algorithms and control were implemented in a personal computer under MATLAB® environment and in a Digital Signal Processor (DSP. The experiments used an industrial robotic manipulator BOSCH SR-800, type SCARA, with four degrees of freedom; however, only the first joint was used to move the end effector to a desired position, the latter obtained as proportional to the EMG amplitude. Results Several trials, including disconnecting and reconnecting one electrode and disturbing the signal with synthetic noise, were performed to test the fusion techniques. The results given by VWA and DKF were transformed into joint coordinates and used as command signals to the robotic arm. Even though the resultant signal was not exact, the failure was ignored and the joint reference signal never exceeded the workspace limits. Conclusion The fault robustness and safety characteristics of a myoelectric controlled manipulator system were substantially improved. The proposed scheme prevents potential risks for the operator, the equipment and the environment. Both algorithms showed efficient behavior. This outline could be applied to myoelectric control of prosthesis, or assistive manipulators to better assure the system functionality when electrode faults or noisy environment are present.

  17. Noninvasive Electroencephalogram Based Control of a Robotic Arm for Reach and Grasp Tasks

    Science.gov (United States)

    Meng, Jianjun; Zhang, Shuying; Bekyo, Angeliki; Olsoe, Jaron; Baxter, Bryan; He, Bin

    2016-12-01

    Brain-computer interface (BCI) technologies aim to provide a bridge between the human brain and external devices. Prior research using non-invasive BCI to control virtual objects, such as computer cursors and virtual helicopters, and real-world objects, such as wheelchairs and quadcopters, has demonstrated the promise of BCI technologies. However, controlling a robotic arm to complete reach-and-grasp tasks efficiently using non-invasive BCI has yet to be shown. In this study, we found that a group of 13 human subjects could willingly modulate brain activity to control a robotic arm with high accuracy for performing tasks requiring multiple degrees of freedom by combination of two sequential low dimensional controls. Subjects were able to effectively control reaching of the robotic arm through modulation of their brain rhythms within the span of only a few training sessions and maintained the ability to control the robotic arm over multiple months. Our results demonstrate the viability of human operation of prosthetic limbs using non-invasive BCI technology.

  18. Robustness of SOC Estimation Algorithms for EV Lithium-Ion Batteries against Modeling Errors and Measurement Noise

    Directory of Open Access Journals (Sweden)

    Xue Li

    2015-01-01

    Full Text Available State of charge (SOC is one of the most important parameters in battery management system (BMS. There are numerous algorithms for SOC estimation, mostly of model-based observer/filter types such as Kalman filters, closed-loop observers, and robust observers. Modeling errors and measurement noises have critical impact on accuracy of SOC estimation in these algorithms. This paper is a comparative study of robustness of SOC estimation algorithms against modeling errors and measurement noises. By using a typical battery platform for vehicle applications with sensor noise and battery aging characterization, three popular and representative SOC estimation methods (extended Kalman filter, PI-controlled observer, and H∞ observer are compared on such robustness. The simulation and experimental results demonstrate that deterioration of SOC estimation accuracy under modeling errors resulted from aging and larger measurement noise, which is quantitatively characterized. The findings of this paper provide useful information on the following aspects: (1 how SOC estimation accuracy depends on modeling reliability and voltage measurement accuracy; (2 pros and cons of typical SOC estimators in their robustness and reliability; (3 guidelines for requirements on battery system identification and sensor selections.

  19. Design for Paperless Recorder Based on ARM and WinCE%基于ARM&WinCE的无纸记录仪

    Institute of Scientific and Technical Information of China (English)

    刘立阳; 张金成

    2011-01-01

    采用ARM微处理器作为主控芯片,基于嵌入式Windows CE操作系统设计了一种新型的无纸记录仪系统.数据采集底层硬件采用万能输入采集控制电路,可以实现64路标准电压、电流、电阻等万能信号隔离输入.软件设计实现了在Platform Builder 5.0环境中支持开发板的WinCE系统层定制,应用程序部分采用多线程编程技术,提高了程序的运行性能.该系统配置高亮度彩色液晶屏、CCFL背光使画面显示更加清晰,支持触控式人机交互功能.%Using ARM microprocessor as the MPU,this paper designed a new paperless recorder system based on embedded Windows CE operating system. It used universal input record and control circuit,and could realize signal universal isolated input from 64 paths,such as standard pressure,current,resistance,etc. In respect of software,it realizes WinCE system layer' s custom made which supported development board in environment of Platform Builder 5. 0. In part of application, the system employed multithreaded programming technique which increases program' s operating capability. At the same time, high light color LCD and CCFL backlight makes the picture clearer which also supports touch control interactive function.

  20. Hardware-Software Co-implementation of H.264 Decoder in SoC

    Institute of Scientific and Technical Information of China (English)

    YANG Yu-hong; ZHANG Wen-jun; XIONG Lian-xue; RAO Zhen-ning

    2006-01-01

    With the increasing demand for flexible and efficient implementation of image and video processing algorithms, there should be a good tradeoff between hardware and software design method. This paper utilized the HW-SW codesign method to implement the H. 264 decoder in an SoC with an ARM core, a multimedia processor and a deblocking filter coprocessor. For the parallel processing features of the multimedia processor, clock cycles of decoding process can be dramatically reduced. And the hardware dedicated deblocking filter coprocessor can improve the efficiency a lot. With maximum clock frequency of 150 MHz, the whole system can achieve real time processing speed and flexibility.

  1. A New Crank Arm-Based Load Cell for the 3D Analysis of the Force Applied by a Cyclist

    Directory of Open Access Journals (Sweden)

    Alexandre Balbinot

    2014-12-01

    Full Text Available This report describes a new crank arm-based force platform designed to evaluate the three-dimensional force applied to the pedals by cyclists in real conditions. The force platform was designed to be fitted on a conventional competition bicycle crankset while data is transmitted wirelessly through a BluetoothTM module and also stored on a SD card. A 3D solid model is created in the SolidWorks (Dassault Systèmes SOLIDWORKS Corp. to analyze the static and dynamic characteristics of the crank arm by using the finite elements technique. Each crankset arm is used as a load cell based on strain gauges configured as three Wheatstone bridges. The signals are conditioned on a printed circuit board attached directly to the structure. The load cell showed a maximum nonlinearity error between 0.36% and 0.61% and a maximum uncertainty of 2.3% referred to the sensitivity of each channel. A roller trainer equipped with an optical encoder was also developed, allowing the measurement of the wheel’s instantaneous velocity.

  2. A new crank arm-based load cell for the 3D analysis of the force applied by a cyclist.

    Science.gov (United States)

    Balbinot, Alexandre; Milani, Cleiton; Nascimento, Jussan da Silva Bahia

    2014-12-03

    This report describes a new crank arm-based force platform designed to evaluate the three-dimensional force applied to the pedals by cyclists in real conditions. The force platform was designed to be fitted on a conventional competition bicycle crankset while data is transmitted wirelessly through a Bluetooth™ module and also stored on a SD card. A 3D solid model is created in the SolidWorks (Dassault Systèmes SOLIDWORKS Corp.) to analyze the static and dynamic characteristics of the crank arm by using the finite elements technique. Each crankset arm is used as a load cell based on strain gauges configured as three Wheatstone bridges. The signals are conditioned on a printed circuit board attached directly to the structure. The load cell showed a maximum nonlinearity error between 0.36% and 0.61% and a maximum uncertainty of 2.3% referred to the sensitivity of each channel. A roller trainer equipped with an optical encoder was also developed, allowing the measurement of the wheel's instantaneous velocity.

  3. Design of Hydraulic Pump Detector Based on ARM%基于ARM的液压泵检测仪设计

    Institute of Scientific and Technical Information of China (English)

    高立龙; 王新晴; 蒋文峰; 张红涛

    2013-01-01

    Aim at the conditions that engineering machine has big fluidity, engineering machine hydraulic system is complex and hydraulic pump detection is difficult on the spot. This paper introduces a design of the portable hydraulic pump detector based on ARM embedded system. This detector has S3C6410A based on ARM11 as the core processor, designing signal regulate circuit, photoelectric isolating circuit and friendly data acquisition software, introducing the installation and test methods of hydraulic pump detection, realizing the collection of pump meters and the hydraulic pump performance test on the spot.%针对工程机械流动性大、液压系统复杂、液压泵现场检测困难等情况.该文设计了一种基于ARM嵌入式系统的便携式液压泵检测仪,该检测仪以ARM 11类型处理器S3C6410A为核心,设计了相应的信号整流电路、光电隔离电路和友好的数据采集软件,介绍了液压泵现场检测的安装和检测方法,实现了液压泵参数的现场快速采集和性能曲线的现场绘制.

  4. Developing an ARM based GNU/Linux Operating System for Single Board Computer – Cubietruck

    OpenAIRE

    S.Pravin Kumar; Pradeep, G; G.Nantha Kumar; C.Dhivya Devi

    2014-01-01

    The design and implementation of a Monolithic-Kernel Single Board Computer (SBC) - Cubietruck GNU/Linux-like operating system on ARM platform in technical details, including boot loader design - UBOOT, building the Kernel - uImage, design of root file system and init process. The Single Board Computer Operating System (SBC OS) is developed on Linux platform with GNU tool chain. The SBC OS can be used for both SBC system application development and related curriculum teaching. Single Board ...

  5. Multi-arm multilateral haptics-based immersive tele-robotic system (HITS) for improvised explosive device disposal

    Science.gov (United States)

    Erickson, David; Lacheray, Hervé; Lai, Gilbert; Haddadi, Amir

    2014-06-01

    This paper presents the latest advancements of the Haptics-based Immersive Tele-robotic System (HITS) project, a next generation Improvised Explosive Device (IED) disposal (IEDD) robotic interface containing an immersive telepresence environment for a remotely-controlled three-articulated-robotic-arm system. While the haptic feedback enhances the operator's perception of the remote environment, a third teleoperated dexterous arm, equipped with multiple vision sensors and cameras, provides stereo vision with proper visual cues, and a 3D photo-realistic model of the potential IED. This decentralized system combines various capabilities including stable and scaled motion, singularity avoidance, cross-coupled hybrid control, active collision detection and avoidance, compliance control and constrained motion to provide a safe and intuitive control environment for the operators. Experimental results and validation of the current system are presented through various essential IEDD tasks. This project demonstrates that a two-armed anthropomorphic Explosive Ordnance Disposal (EOD) robot interface can achieve complex neutralization techniques against realistic IEDs without the operator approaching at any time.

  6. Dynamic modeling of dual-arm cooperating manipulators based on Udwadia–Kalaba equation

    Directory of Open Access Journals (Sweden)

    Jia Liu

    2016-07-01

    Full Text Available Dual-arm cooperating manipulators subject to a certain constraint brought about by the desired trajectory and geometric constraint show high nonlinearity and coupling in their dynamic characteristic. Therefore, it is hard to build dynamical equation with traditional Lagrange equation. The Udwadia–Kalaba equation presents a new idea of dynamic modeling of multi-body systems. However, the dynamic modeling of the unconstrained systems still depends on the traditional Lagrange equation and is quite tedious for dual-arm cooperating manipulators. A generalized dynamical equation of multi-link planar manipulators is thus presented and proven to make modeling conveniently. The constraint relationship is established from a new perspective, and the dynamical equation of dual-arm cooperating manipulator subject to the desired trajectory is acquired with the Udwadia–Kalaba equation. The simple approach overcomes the disadvantage of obtaining dynamical equation from traditional Lagrange equation by Lagrange multiplier. The simulation results of varying law of the joint angles and the motion path of the bar prove that the dynamical equation established by this method conforms to reality.

  7. SOCS3 and SOCS5 mRNA expressions may predict initial steroid response in nephrotic syndrome children

    Directory of Open Access Journals (Sweden)

    Witold Szaflarski

    2012-01-01

    Full Text Available Suppressors of Cytokine Signaling (SOCS inhibit Signal Transducers and Activators of Transcription (STATs phosphorylation by binding and inhibiting Janus Kinases (JaKs. The aim of the present study was to evaluate the influence of glucocorticosteroids on the JaK/STAT signaling pathway in the leukocytes of nephrotic syndrome (NS patients. The study group was composed of 34 steroid sensitive NS (SSNS children and 20 steroid resistant NS (SRNS subjects. Gene expression was assessed by real-time PCR using pre-designed human JaK/STAT PCR array. Protein expression was evaluated using ELISA assay (plasma concentration and immunofluorescence (in situ protein expression. In SSNS children, the initial increased expression of JaK1, JaK2, JaK3, STAT1, STAT2, STAT6, TYK2, SOCS1, SOCS2, SOCS3, SOCS4 and SOCS5 was reduced back to the control limits. Similarly, in SRNS patients the increased levels of almost all mRNA expressions for the abovementioned genes were decreased, with the exceptions of SOCS3 and SOCS5 expressions. These mRNA expressions were still significantly increased and correlated with early unfavorable course of nephrotic syndrome in children. Plasma levels of SOCS3, SOCS5, IL-6 and IL-20 were significantly increased in SRNS subjects after six weeks of steroids medication compared to SSNS and control participants. We conclude that SOCS3 and SOCS5 increased mRNA expressions might predict initial resistance to steroids in NS patients. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 4, pp. 719–728

  8. Self-recording Water-Level Acquisition Based on ARM%基于 ARM 的自计式水位采集器

    Institute of Scientific and Technical Information of China (English)

    陈磊; 马孝义; 陈海涛; 周晓倩

    2014-01-01

    为了满足对灌区水情信息实时测报的需求,研究开发了一种基于 ARM的自计式水位采集器。该采集器以LPC2132为核心,采用高精度的超声波水位传感器和单片机智能系统实现对水位信息的测量和流量的计算,再将数据进行处理整合之后,以SPI 模式通过 SD 卡接口电路存储数据。该设计集水位采集、流量计算、数据的处理存储于一体,实现了对水位信息的自动实时采集记录,且工作稳定可靠、功耗低,更适用于电池供电、长时间无人看守的荒野河道和偏远水库等场合。%A self-recording water-level acquisition based on ARM has been developed to meet the demands of the fact of water-condition measuring in irrigation districts .This system takes LPC2132 as the core module , by using high-preci-sion ultrasonic water-level sensor and microcontroller smart system into the measurement of water level and the calcula -tion of flow rate , the data can be done and then can be saved into the SD card in SPI mode through interface circuit of SD card after integrating .The design of this acquisition is an combination of water level collection , flow calculation , data processing and storage , can automatically collect and record the information of water level in real-time .And it is stable , reliable, low power consuming, more suitable for battery-powered, unattended wilderness river, remote reservoirs, and other occasions .

  9. 基于ARM9的物联网网关设计与实现%Design and Implementation of IOT Gateway Based on ARM9

    Institute of Scientific and Technical Information of China (English)

    罗回彬; 吴庆光; 邱国超; 潘维松

    2014-01-01

    本项目以ARM9为平台,采用Linux2.6操作系统,结合ZigBee协议栈进行API接口函数的开发编码,实现ZigBee、WiFi网络之间的协议转换及数据通讯,并通过QT界面编程进行演示程序测试试验。%By using ARM9 as the platform and Linux 2.6 as the operating system, this project develops and codes the API interface functions by combining with ZigBee protocol stack to realize the protocol conversion and data communication between ZigBee and WiFi network, and tests the validity of the design through QT for inter-face programming.

  10. ARM11-based video capture system and two-dimensional code recognition%基于ARM11的视频采集系统及二维码识别

    Institute of Scientific and Technical Information of China (English)

    段东波; 靳天玉

    2013-01-01

    With the development of information technology,more and more application of ARM embedded system as the core. Therefore,further research ARM core and based on the ARM core application will make it better to meet the practical need. This article through to ARM core as well as the embedded Linux research, using QT programming,realized the video acquisition which based on Samsung S3C6410 processor and QR code recognition.The article emphasis on describes the process of Embedded Linux transplantation, Video acquisition and QR code recognition.%随着信息技术的发展,越来越多的领域应用ARM作为嵌入式系统的核心。因此,深入研究ARM核心以及基于ARM核心的应用使其更好的符合实际需要,便显得尤为重要。本文通过对ARM核心以及嵌入式Linux的研究,利用QT编程,实现了基于三星S3C6410处理器的视频采集以及二维码识别。文章重点描述了嵌入式Linux的移植、视频采集以及二维码识别等应用程序的流程。

  11. Transport-distance specific SOC distribution: Does it skew erosion induced C fluxes?

    DEFF Research Database (Denmark)

    Hu, Yaxian; Berbe, Asmerat Asefaw; Fogel, Marilyn L.

    2016-01-01

    Abstract The net effect of soil erosion by water, as a sink or source of atmospheric carbon dioxide (CO2), is determined by the spatial (re-)distribution and stability of eroded soil organic carbon (SOC), and the dynamic replacement of eroded C by the production of new photosynthate. The depositi......Abstract The net effect of soil erosion by water, as a sink or source of atmospheric carbon dioxide (CO2), is determined by the spatial (re-)distribution and stability of eroded soil organic carbon (SOC), and the dynamic replacement of eroded C by the production of new photosynthate....... (Land Degrad Dev 11:83–91, 2000) to predict SOC redistribution patterns along hillslopes. The d13C values of soil fractions were more positive at the footslope than on the slope shoulder or at the slope tail, suggesting enhanced decomposition rate of fresh SOC input at the footslope during or after...... emissions during or immediately after transport, must be appropriately accounted for in attempts to quantify the role of soil erosion in terrestrial C sequestration. A SOC erodibility parameter based on actual settling velocity distribution of eroded fractions is needed to better calibrate soil erosion...

  12. Aging and work: how do SOC strategies contribute to job performance across adulthood?

    Science.gov (United States)

    Yeung, Dannii Y; Fung, Helene H

    2009-12-01

    The authors examined the impacts of selection, optimization, and compensation (SOC) strategies-elective selection, loss-based selection, optimization, and compensation-on job performance across adulthood. A cross-sectional survey (Study 1, N=355) and a 5-day experience sampling study (Study 2, N=87) were conducted to assess Chinese insurance sales workers' global and momentary employment of SOC strategies at work and compare the effectiveness of these strategies in predicting their job performance. Study 1 revealed that the use of compensation predicted higher performance maintenance among older workers, whereas the use of elective selection contributed positively to sales productivity for both age groups, with stronger association for younger workers. Study 2 demonstrated that the positive impact of SOC strategies on global and momentary measures of job performance differed across tasks with various difficulty levels. When the task was perceived as highly difficult, older workers' greater use of elective selection predicted higher self-rated task performance; however, the positive association was weaker among younger workers. Older workers' greater use of the 4 SOC strategies was positively associated with sales increases when the task was not difficult or moderately difficult, yet the relationship was negative when the task was highly difficult. A reverse pattern was observed among younger workers. This article contributes to the understanding of working adults' psychological adaptation to the process of aging and reveals the moderating role of task difficulty on the association between SOC strategies and performance outcomes.

  13. 基于ARM9的嵌入式多串口服务器设计%Design of ARM9-based Embedded Serial Server

    Institute of Scientific and Technical Information of China (English)

    王海勇

    2013-01-01

    ARM920T为内核的S3 C2440A作为主控制器和以太网控制芯片DM9000AEP设计硬件平台;构建并移植适合嵌入式串口服务器系统的嵌入式Linux操作系统,利用Linux完善的TCP/IP协议设计ARM端的多线程网络服务器程序.设计实现RS-232C串口与以太网口数据的双向传输,使现有的智能仪器设备成功接入以太网.%The hardware platform was designed which takes ARM920T-cored S3C2440A as the master controller and employs DM9000AEP Ethernet controller chip; the Linux operating system being applicable to the embedded serial port server system was built and transplanted, and though making use of the perfected TCP/IP protocol, the multi-threaded web server program for ARM side was designed. The two-way data transmission realized between RS-232 serial port and Ethernet data can allow the existing intelligent Ethernet to access the Ethernet successfully.

  14. Detachment of Tertiary Dendrite Arms during Controlled Directional Solidification in Aluminum - 7 wt Percent Silicon Alloys: Observations from Ground-based and Microgravity Processed Samples

    Science.gov (United States)

    Grugel, Richard N.; Erdman, Robert; Van Hoose, James R.; Tewari, Surendra; Poirier, David

    2012-01-01

    Electron Back Scattered Diffraction results from cross-sections of directionally solidified aluminum 7wt% silicon alloys unexpectedly revealed tertiary dendrite arms that were detached and mis-oriented from their parent arm. More surprisingly, the same phenomenon was observed in a sample similarly processed in the quiescent microgravity environment aboard the International Space Station (ISS) in support of the joint US-European MICAST investigation. The work presented here includes a brief introduction to MICAST and the directional solidification facilities, and their capabilities, available aboard the ISS. Results from the ground-based and microgravity processed samples are compared and possible mechanisms for the observed tertiary arm detachment are suggested.

  15. Video Surveillance System Based on ARM%基于ARM的视频监控系统

    Institute of Scientific and Technical Information of China (English)

    曾瀑; 王微; 詹传栋

    2011-01-01

    设计了一种基于三星ARM9的S3C2440芯片的视频监控系统.该系统通过摄像头采集图像并对图像进行运动检测和压缩编码.实验结果表明该系统保持了图像传输的流畅性,同时能够时运动的入侵目标进行闪烁标注,达到入侵、运动检测的目的.

  16. SOCS1 Mimetic Peptide Suppresses Chronic Intraocular Inflammatory Disease (Uveitis

    Directory of Open Access Journals (Sweden)

    Chang He

    2016-01-01

    Full Text Available Uveitis is a potentially sight-threatening disease characterized by repeated cycles of remission and recurrent inflammation. The JAK/STAT pathway regulates the differentiation of pathogenic Th1 and Th17 cells that mediate uveitis. A SOCS1 mimetic peptide (SOCS1-KIR that inhibits JAK2/STAT1 pathways has recently been shown to suppress experimental autoimmune uveitis (EAU. However, it is not clear whether SOCS1-KIR ameliorated uveitis by targeting JAK/STAT pathways of pathogenic lymphocytes or via inhibition of macrophages and antigen-presenting cells that also enter the retina during EAU. To further investigate mechanisms that mediate SOCS1-KIR effects and evaluate the efficacy of SOCS1-KIR as an investigational drug for chronic uveitis, we induced EAU in rats by adoptive transfer of uveitogenic T-cells and monitored disease progression and severity by slit-lamp microscopy, histology, and optical coherence tomography. Topical administration of SOCS1-KIR ameliorated acute and chronic posterior uveitis by inhibiting Th17 cells and the recruitment of inflammatory cells into retina while promoting expansion of IL-10-producing Tregs. We further show that SOCS1-KIR conferred protection of resident retinal cells that play critical role in vision from cytotoxic effects of inflammatory cytokines by downregulating proapoptotic genes. Thus, SOCS1-KIR suppresses uveitis and confers neuroprotective effects and might be exploited as a noninvasive treatment for chronic uveitis.

  17. Expression of SOCS-3 and Its Methylation in Renal Cancer

    Institute of Scientific and Technical Information of China (English)

    YU Jing; ZHAO Li-chun; YAO Song-mei; HE Cheng-yan; LI Hong-jun; KONG Xiang-bo

    2011-01-01

    The expression level of suppressor of cytokine signaling-3(SOCS-3) in human renal carcinoma and its methylation state were investigated. Reverse transcription-polymerase chain reaction(RT-PCR), immuocytochemistry,immunohistochemistry and Western blot were used to detect the expression level of SOCS-3, and the methylation of SOCS gene was investigated by methylation specific PCR in the tissues of i 5 cases of renal carcinoma. Compared to those of the normal renal cell line and specimens, the expression level of SOCS-3 in renal carcinoma was significantly lower or can't be detected(P<0.01). And the methylation of SOCS-3 gene in the tissue of renal carcinoma was significantly higher. The expression of SOCS-3 gene is significantly lower in renal carcinoma and the high methylation of the promoter island of SOCS-3 gene is associated with the lower expression of SOCS-3 gene. It may be one of main mechanisms for the development and progress of renal carcinoma.

  18. Efficient Wrapper/TAM Co-Optimization for SOC Using Rectangle Packing

    CERN Document Server

    Islam, Md Rafiqul; Mahmud, Abdullah Al; Islam, Md Saiful; Babu, Hafiz Md Hasan

    2010-01-01

    The testing time for a system-on-chip(SOC) largely depends on the design of test wrappers and the test access mechanism(TAM).Wrapper/TAM co-optimization is therefore necessary to minimize SOC testing time . In this paper, we propose an efficient algorithm to construct wrappers that reduce testing time for cores. We further propose a new approach for wrapper/TAM co-optimization based on two-dimensional rectangle packing. This approach considers the diagonal length of the rectangles to emphasize on both TAM widths required by a core and its corresponding testing time.

  19. 基于ARM9的机场应急救援拖车同步控制研究%Research of airport emergency rescue trailer synchronous control based on ARM9

    Institute of Scientific and Technical Information of China (English)

    张积洪; 周同旭

    2012-01-01

    A synchronous electrical control system of airport emergency rescue trailer is designed. Based on the ARM-Linux platform, the GUI and programming design of host and master PC is completed by using Qt/Embedded and Ladder, and the host and the master computer take ARM9 and PLC as the core respectively, and they communicate through 485. By connecting the testing model and control system, the simultaneously turning function controlled by remote controller is achieved. The feasibility of the system has been confirmed by testing the model.%研究了一种机场应急救援拖车的同步电气控制系统.基于ARM-Linux平台,上位机以ARM9为核心,下位机以PLC为核心,使用Qt/Embedded和梯形图完成对上、下位机的GUI和程序设计,上下位机采用485通讯.连接试验模型和控制系统,实现了用遥控器控制机场应急救援拖车同步转向,通过对模型的测试,其可行性已被初步的实验证实.

  20. The Design of a Small UAV's Flight Controller Based on ARM11+CPLD%基于ARM11+CPLD的小型无人机飞行控制器设计

    Institute of Scientific and Technical Information of China (English)

    郑积仕; 蒋新华; 陈兴武

    2012-01-01

    本文针对小型无人机控制精度低、实时性不足的问题,设计了基于ARM11+ CPLD的飞行控制器.阐述该飞行控制器的硬件总体架构,各传感器与ARM11接口设计,CPLD并行多路PWM输入、输出设计;阐述硬件的驱动,导航控制、姿态控制的算法设计与实现.该飞行控制器的飞行测试结果理想.%The design of the flight controller based on ARM11+CPLD is presented in this paper aiming to solve the low accuracy and the inadequacy of real time in the control of UAV (Unamed Aircraft Veheicle). The overall frame of the flight controller hardware, the design of the interface between ARM11 and several sensors and the design of multi parallel PWM controls in CPLD are all presented. Furthermore, this paper also elaborates the hardware drive and the algorithm design and fulfillment of the navigation control and the attitude control. The flight test shows the flight controller works well.

  1. SOCS2 Balances Metabolic and Restorative Requirements during Liver Regeneration.

    Science.gov (United States)

    Masuzaki, Ryota; Zhao, Sophia; Valerius, M Todd; Tsugawa, Daisuke; Oya, Yuki; Ray, Kevin C; Karp, Seth J

    2016-02-12

    After significant injury, the liver must maintain homeostasis during the regenerative process. We hypothesized the existence of mechanisms to limit hepatocyte proliferation after injury to maintain metabolic and synthetic function. A screen for candidates revealed suppressor of cytokine signaling 2 (SOCS2), an inhibitor of growth hormone (GH) signaling, was strongly induced after partial hepatectomy. Using genetic deletion and administration of various factors we investigated the role of SOCS2 during liver regeneration. SOCS2 preserves liver function by restraining the first round of hepatocyte proliferation after partial hepatectomy by preventing increases in growth hormone receptor (GHR) via ubiquitination, suppressing GH pathway activity. At later times, SOCS2 enhances hepatocyte proliferation by modulating a decrease in serum insulin-like growth factor 1 (IGF-1) that allows GH release from the pituitary. SOCS2, therefore, plays a dual role in modulating the rate of hepatocyte proliferation. In particular, this is the first demonstration of an endogenous mechanism to limit hepatocyte proliferation after injury.

  2. Settling-velocity specific SOC distribution on hillslopes

    DEFF Research Database (Denmark)

    Hu, Yaxian; Berhe, Asmeret Asefaw; Fogel, Marilyn L.;

    The net effect of soil erosion by water, as a sink or source of atmospheric CO2, is determined by the spatial (re-)distribution and stability of eroded soil organic carbon (SOC). The depositional position of eroded SOC is a function of the transport distances of soil fractions where the SOC...... is stored. In theory, the transport distances of soil fractions are related to their settling velocities under given flow conditions. Yet, very few field investigations have been conducted to examine the actual movement of eroded soil fractions along hillslopes, let alone the re-distribution pattern of SOC...... shows a coarsening effect immediately below the eroding slope, followed by a fining trend at the slope tail. The 13C values of soil fractions were more positive at the footslope than on the slope shoulder or at the slope tail, suggesting enhanced decomposition rate of fresh SOC input at the footslope...

  3. Evaluation of imaging quality for flat-panel detector based low dose C-arm CT system

    Energy Technology Data Exchange (ETDEWEB)

    Seo, Chang-Woo; Cha, Bo Kyung; Jeon, Sungchae; Huh, Young [Converged Medical Device Research Center, Advanced Medical Device Research Division, KERI, Gyeonggido 426-910 (Korea, Republic of)

    2015-07-01

    The image quality associated with the extent of the angle of gantry rotation, the number of projection views, and the dose of X-ray radiation was investigated in flat-panel detector (FPD) based C-arm cone-beam computed tomography (CBCT) system for medical applications. A prototype CBCT system for the projection acquisition used the X-ray tube (A-132, Varian inc.) having rhenium-tungsten molybdenum target and flat panel a-Si X-ray detector (PaxScan 4030CB, Varian inc.) having a 397 x 298 mm active area with 388 μm pixel pitch and 1024 x 768 pixels in 2 by 2 binning mode. The performance comparison of X-ray imaging quality was carried out using the Feldkamp, Davis, and Kress (FDK) reconstruction algorithm between different conditions of projection acquisition. In this work, head-and-dental (75 kVp/20 mA) and chest (90 kVp/25 mA) phantoms were used to evaluate the image quality. The 361 (30 fps x 12 s) projection data during 360 deg. gantry rotation with 1 deg. interval for the 3D reconstruction were acquired. Parke weighting function were applied to handle redundant data and improve the reconstructed image quality in a mobile C-arm system with limited rotation angles. The reconstructed 3D images were investigated for comparison of qualitative image quality in terms of scan protocols (projection views, rotation angles and exposure dose). Furthermore, the performance evaluation in image quality will be investigated regarding X-ray dose and limited projection data for a FPD based mobile C-arm CBCT system. (authors)

  4. An Analytical Link Loss Model for On-Body Propagation Around the Body Based on Elliptical Approximation of the Torso with Arms' Influence Included

    CERN Document Server

    Chandra, Rohit

    2013-01-01

    An analytical model for estimating the link loss for the on-body wave propagation around the torso is presented. The model is based on the attenuation of the creeping waves over an elliptical approximation of the human torso and includes the influence of the arms. The importance of including the arms' effect for a proper estimation of the link loss is discussed. The model is validated by the full-wave electromagnetic simulations on a numerical phantom.

  5. 基于ARM NEON的H.265解码器优化%H.265 Decoder Optimization Based on ARM NEON

    Institute of Scientific and Technical Information of China (English)

    简欢

    2014-01-01

    基于ARM Cortex A9处理器平台,对NEON处理器的指令和编程优化方法等技术进行了分析,并以此为平台进行了H.265软件解码器的优化实现.在瑞芯微电子的RK3188 SDK开发板上进行了充分测试,实验结果表明NEON处理器可以较好地提高H.265软件解码器的执行效率.

  6. Expression of the SOCS family in human chronic wound tissues: Potential implications for SOCS in chronic wound healing.

    Science.gov (United States)

    Feng, Yi; Sanders, Andrew J; Ruge, Fiona; Morris, Ceri-Ann; Harding, Keith G; Jiang, Wen G

    2016-11-01

    Cytokines play important roles in the wound healing process through various signalling pathways. The JAK-STAT pathway is utilised by most cytokines for signal transduction and is regulated by a variety of molecules, including suppressor of cytokine signalling (SOCS) proteins. SOCS are associated with inflammatory diseases and have an impact on cytokines, growth factors and key cell types involved in the wound‑healing process. SOCS, a negative regulator of cytokine signalling, may hold the potential to regulate cytokine‑induced signalling in the chronic wound‑healing process. Wound edge tissues were collected from chronic venous leg ulcer patients and classified as non-healing and healing wounds. The expression pattern of seven SOCSs members, at the transcript and protein level, were examined in these tissues using qPCR and immunohistochemistry. Significantly higher levels of SOCS3 (P=0.0284) and SOCS4 (P=0.0376) in non-healing chronic wounds compared to the healing/healed chronic wounds were observed at the transcript level. Relocalisation of SOCS3 protein in the non-healing wound environment was evident in the investigated chronic biopsies. Thus, the results show that the expression of SOCS transcript indicated that SOCS members may act as a prognostic biomarker of chronic wounds.

  7. Are soils of Iowa USA currently a carbon sink or source? Simulated changes in SOC stock from 1972 to 2007

    Science.gov (United States)

    Liu, S.; Tan, Z.; Li, Z.; Zhao, S.; Yuan, W.

    2011-01-01

    Upscaling the spatial and temporal changes in carbon (C) stocks and fluxes from sites to regions is a critical and challenging step toward improving our understanding of the dynamics of C sources and sinks over large areas. This study simulated soil organic C (SOC) dynamics within 0-100cm depth of soils across the state of Iowa in the USA from 1972 to 2007 using the General Ensemble biogeochemical Modeling System (GEMS). The model outputs with variation coefficient were analyzed and assembled from simulation unit to the state scale based upon major land use types at annual step. Results from this study indicate that soils (within a depth of 0-100cm) in Iowa had been a SOC source at a rate of 190??380kg Cha-1yr-1. This was likely caused by the installation of a massive drainage system which led to the release of SOC from deep soil layers previously protected under poor drainage conditions. The annual crop rotation was another major force driving SOC variation and resulted in spatial variability of annual budgets in all croplands. Annual rate of change of SOC stocks in all land types depended significantly on the baseline SOC levels; soils with higher SOC levels tended to be C sources, and those with lower levels tended to be C sinks. Management practices (e.g., conservation tillage and residue management practices) slowed down the C emissions from Iowa soils, but could not reverse the general trend of net SOC loss in view of the entire state due mainly to a high level of baseline SOC stocks. ?? 2010 Elsevier B.V.

  8. An Optimized Spline-Based Registration of a 3D CT to a Set of C-Arm Images

    Directory of Open Access Journals (Sweden)

    2006-01-01

    Full Text Available We have developed an algorithm for the rigid-body registration of a CT volume to a set of C-arm images. The algorithm uses a gradient-based iterative minimization of a least-squares measure of dissimilarity between the C-arm images and projections of the CT volume. To compute projections, we use a novel method for fast integration of the volume along rays. To improve robustness and speed, we take advantage of a coarse-to-fine processing of the volume/image pyramids. To compute the projections of the volume, the gradient of the dissimilarity measure, and the multiresolution data pyramids, we use a continuous image/volume model based on cubic B-splines, which ensures a high interpolation accuracy and a gradient of the dissimilarity measure that is well defined everywhere. We show the performance of our algorithm on a human spine phantom, where the true alignment is determined using a set of fiducial markers.

  9. Identification of RBC and WBC Count in Human Blood Using ARM Based Instrumentation

    Directory of Open Access Journals (Sweden)

    B.Dodda Basavanagoud

    2015-06-01

    Full Text Available The rapid growth in microelectronics and crunching RISC in the field of bio-medical sciences incorporated of soft tools to diagnose various parameters of human fluids. Conventional method of blood sample analysis makes use of laboratory technique of titration, which is operator-dependent and results in lot of errors depending on the skill of the technician. In order to eliminate the human errors involved in the conventional method, in this paper an attempt has been made to present a capillary centrifuge technique driven by high speed DC motor fed by Morgan chopper and controlled by powerful ARM processor. It results in accurate analysis of the blood samples. The various techniques involved in accurate sensing of speed using timer and generation of firing pulses to thyristor in the Morgan chopper is judiciously achieved. This paper clearly brings out the advantages of the proposed blood measurement technique which effectively gives blood analysis faster and at a low cost.

  10. Lyapunov function-based control laws for revolute robot arms - Tracking control, robustness, and adaptive control

    Science.gov (United States)

    Wen, John T.; Kreutz-Delgado, Kenneth; Bayard, David S.

    1992-01-01

    A new class of joint level control laws for all-revolute robot arms is introduced. The analysis is similar to a recently proposed energy-like Liapunov function approach, except that the closed-loop potential function is shaped in accordance with the underlying joint space topology. This approach gives way to a much simpler analysis and leads to a new class of control designs which guarantee both global asymptotic stability and local exponential stability. When Coulomb and viscous friction and parameter uncertainty are present as model perturbations, a sliding mode-like modification of the control law results in a robustness-enhancing outer loop. Adaptive control is formulated within the same framework. A linear-in-the-parameters formulation is adopted and globally asymptotically stable adaptive control laws are derived by simply replacing unknown model parameters by their estimates (i.e., certainty equivalence adaptation).

  11. Afforestation effects on SOC in former cropland: oak and spruce chronosequences resampled after 13 years.

    Science.gov (United States)

    Bárcena, Teresa G; Gundersen, Per; Vesterdal, Lars

    2014-09-01

    Chronosequences are commonly used to assess soil organic carbon (SOC) sequestration after land-use change, but SOC dynamics predicted by this space-for-time substitution approach have rarely been validated by resampling. We conducted a combined chronosequence/resampling study in a former cropland area (Vestskoven) afforested with oak (Quercus robur) and Norway spruce (Picea abies) over the past 40 years. The aims of this study were (i) to compare present and previous chronosequence trends in forest floor and top mineral soil (0-25 cm) C stocks; (ii) to compare chronosequence estimates with current rates of C stock change based on resampling at the stand level; (iii) to estimate SOC changes in the subsoil (25-50 cm); and (iv) to assess the influence of two tree species on SOC dynamics. The two chronosequence trajectories for forest floor C stocks revealed consistently higher rates of C sequestration in spruce than oak. The chronosequence trajectory was validated by resampling and current rates of forest floor C sequestration decreased with stand age. Chronosequence trends in topsoil SOC in 2011 did not differ significantly from those reported in 1998, however, there was a shift from a negative rate (1998: -0.3 Mg C ha(-1) yr(-1) ) to no change in 2011. In contrast SOC stocks in the subsoil increased with stand age, however, not significantly (P = 0.1), suggesting different C dynamics in and below the former plough layer. Current rates of C change estimated by repeated sampling decreased with stand age in forest floors but increased in the topsoil. The contrasting temporal change in forest floor and mineral soil C sequestration rates indicate a shift in C source-sink strength after approximately 40 years. We conclude that afforestation of former cropland within the temperate region may induce soil C loss during the first decades followed by a recovery phase of yet unknown duration.

  12. Gameboy Emluator Transplantation and Optimization Based on ARM Linux%基于ARM Linux的Gameboy模拟器移植和优化研究

    Institute of Scientific and Technical Information of China (English)

    顾叶锋; 付宇卓; 鲁欣

    2005-01-01

    MX1体系结构采用ARM920T内核,针对它构建嵌入式Linux平台,把Gameboy模拟器(以下统一称为Gnuboy)移植过去;对Gnuboy的源代码进行修改,在宿主平台上交叉编译,编译好的可执行文件烧入测试板上运行,这是移植的过程;Gnuboy在嵌入式环境下面临速度慢的问题,可以对原先的一些C函数用ARM汇编改写来加快速度,这里用到基于图着色技术的寄存器分配算法的一种简化方法,用这种方法对Gnuboy源代码中的几个函数进行了优化处理,优化效果可用相应的工具软件进行测试;这些移植和优化研究工作,目的是为了把Gnuboy应用到基于ARM Linux的嵌入式产品中,同时对研究该平台下一般的虚拟机技术应用也有相应的价值.

  13. Human Arm Motion Tracking by Orientation-Based Fusion of Inertial Sensors and Kinect Using Unscented Kalman Filter.

    Science.gov (United States)

    Atrsaei, Arash; Salarieh, Hassan; Alasty, Aria

    2016-09-01

    Due to various applications of human motion capture techniques, developing low-cost methods that would be applicable in nonlaboratory environments is under consideration. MEMS inertial sensors and Kinect are two low-cost devices that can be utilized in home-based motion capture systems, e.g., home-based rehabilitation. In this work, an unscented Kalman filter approach was developed based on the complementary properties of Kinect and the inertial sensors to fuse the orientation data of these two devices for human arm motion tracking during both stationary shoulder joint position and human body movement. A new measurement model of the fusion algorithm was obtained that can compensate for the inertial sensors drift problem in high dynamic motions and also joints occlusion in Kinect. The efficiency of the proposed algorithm was evaluated by an optical motion tracker system. The errors were reduced by almost 50% compared to cases when either inertial sensor or Kinect measurements were utilized.

  14. SOCS3 and its role in associated diseases.

    Science.gov (United States)

    Yin, Yanlin; Liu, Weiwei; Dai, Yalei

    2015-10-01

    Cell-cell communication depends on cytokine and growth factor network. Bound to their receptors on the surface of target cell, these glycoproteins initiate a range of intracellular events. Subsequent dissipation of receptor signaling is essential to ensure the response of the cell does not become pathogenic. The Suppressors of cytokine signaling (SOCS) proteins are a family of proteins induced to attenuate cytokine signal transduction in response to signals from a diverse range of cytokines and growth factors. Current evidence indicates that intracellular JAK-STAT (Janus kinase-signal transducer and activator of transcription) signaling not only governs cytokine-induced immunological responses but also rapidly initiates SOCS expression and its biological functions. This review focuses on current understanding of SOCS3, a member of SOCS family. SOCS3 binds to JAK, certain cytokine receptors in intracellular domain, and some signaling molecules, which results in suppressing further signaling events in the cell. Studies using conditional knockout mice have shown that SOCS3 protein is the key physiological regulator and plays an important pathological role in immune homeostasis. Dysregulation of SOCS3 functions can cause a variety of diseases, including allergy, autoimmune diseases, inflammation and cancer.

  15. 基于System Generator的异构多核片上系统设计%Design of Heterogeneous Multi-core SoC Based on System Generator

    Institute of Scientific and Technical Information of China (English)

    杨宏来; 黄旻

    2012-01-01

      Heterogeneous multi-core processors can assign different types of tasks to different types of processor cores to parallelly proces, therefore, when faced with different application requirements, it can provide more flexible and efficient mechanism. This paper proposes a method to design heterogeneous multi-core system oriented SoC, and it can convenient to realize the processing of image. Described the basic methods of image degradation and restoration, and give the basic model of the algorithm. and making system modeling and simulation using the digital signal processing development tool System Generator. The EDK processor can generated the coprocessor Pcore. Build a heterogeneous multi-core SoC using the Pcore combined with the Xilinx microblaze soft-core. The method reduces the most part of the work of writing HDL manually and makes the design process tend to simplify.%  异构多核处理器可将不同类型的任务分配到不同类型的处理器核上并行处理,面对不同的应用需求,可以提供比较灵活、高效的处理机制。文中提出一种面向SoC的异构多核系统的设计方法,运用该方法可高效方便地实现图像处理算法。首先对图像退化和复原的基本方法进行介绍,给出算法实现的基本模型,并运用数字信号处理开发工具System Generator进行系统级建模仿真。然后通过EDK Processor自动生成图像退化和复原的协处理器Pcore,结合Xilinx的MicroBlaze软核,构建出异构多核片上系统。

  16. C-arm based cone-beam CT using a two-concentric-arc source trajectory: system evaluation

    Science.gov (United States)

    Zambelli, Joseph; Zhuang, Tingliang; Nett, Brian E.; Riddell, Cyril; Belanger, Barry; Chen, Guang-Hong

    2008-03-01

    The current x-ray source trajectory for C-arm based cone-beam CT is a single arc. Reconstruction from data acquired with this trajectory yields cone-beam artifacts for regions other than the central slice. In this work we present the preliminary evaluation of reconstruction from a source trajectory of two concentric arcs using a flat-panel detector equipped C-arm gantry (GE Healthcare Innova 4100 system, Waukesha, Wisconsin). The reconstruction method employed is a summation of FDK-type reconstructions from the two individual arcs. For the angle between arcs studied here, 30°, this method offers a significant reduction in the visibility of cone-beam artifacts, with the additional advantages of simplicity and ease of implementation due to the fact that it is a direct extension of the reconstruction method currently implemented on commercial systems. Reconstructed images from data acquired from the two arc trajectory are compared to those reconstructed from a single arc trajectory and evaluated in terms of spatial resolution, low contrast resolution, noise, and artifact level.

  17. Implementation of a wireless ECG acquisition SoC for IEEE 802.15.4 (ZigBee) applications.

    Science.gov (United States)

    Wang, Liang-Hung; Chen, Tsung-Yen; Lin, Kuang-Hao; Fang, Qiang; Lee, Shuenn-Yuh

    2015-01-01

    This paper presents a wireless biosignal acquisition system-on-a-chip (WBSA-SoC) specialized for electrocardiogram (ECG) monitoring. The proposed system consists of three subsystems, namely, 1) the ECG acquisition node, 2) the protocol for standard IEEE 802.15.4 ZigBee system, and 3) the RF transmitter circuits. The ZigBee protocol is adopted for wireless communication to achieve high integration, applicability, and portability. A fully integrated CMOS RF front end containing a quadrature voltage-controlled oscillator and a 2.4-GHz low-IF (i.e., zero-IF) transmitter is employed to transmit ECG signals through wireless communication. The low-power WBSA-SoC is implemented by the TSMC 0.18-μm standard CMOS process. An ARM-based displayer with FPGA demodulation and an RF receiver with analog-to-digital mixed-mode circuits are constructed as verification platform to demonstrate the wireless ECG acquisition system. Measurement results on the human body show that the proposed SoC can effectively acquire ECG signals.

  18. Research and Utilization of NEON Technology Based on ARM Cortex-A9%ARM Cortex-A9的NEON技术研究及应用

    Institute of Scientific and Technical Information of China (English)

    陈新泽; 杨斌

    2013-01-01

    ARM Cortex-A系列处理器首次集成了NEON技术,可以有效加速多媒体应用.本文基于Cortex-A9处理器,对NEON技术进行研究,并对JM解码器进行NEON优化,提供实际优化效果.在PandaBoard开发板上对不同分辨率的多个测试序列进行了解码测试,测试结果显示,优化后的解码速率提高了,而且提高分辨率并不影响优化效果.

  19. 基于ARM Integrator的Sigma-Delta音频DAC的实现%Implementation of Sigma-Delta Audio DAC Based on ARM Integrator

    Institute of Scientific and Technical Information of China (English)

    于芳玲; 闫华; 钟锐

    2007-01-01

    介绍了ARM公司的一款FPGA验证开发平台ARM Integrator,以及基于该平台设计的Sigma-Delta音频DAC的实现.在详细介绍Integrator的各个模块的基础之上,利用开发平台的FPGA上验证实现了一个1阶的6位的Sigma-Delta型的DAC,主要包括Sigma-Delta DAC的原理与主要电路,FPGA验证实现过程中的DAC数字滤波器以及调制器的设计以及验证流程,通过virsim仿真时序波形,验证了所设计的DAC正确性和可实现性.

  20. 基于ARM7的半自动生化分析仪%A Semi-automated Clinical Chemistry Analyzer Based on ARM7

    Institute of Scientific and Technical Information of China (English)

    叶小岭; 黄俊平; 张颖超; 孙宁

    2007-01-01

    介绍了一种基于ARM7芯片SEP3203的嵌入式半自动生化分析仪,辅以一片PIC单片机作为协处理器.给出了仪器的工作原理.系统硬件电路由存储器子系统、液路子系统、温度控制模块、吸光度采集模块、人机交互模块等模块组成,详细描述了各硬件模块的设计.分析了软件系统的设计.该新型生化分析仪使用方便,性价比高,适用于国内的中小型医疗机构.

  1. ESO-Based Fuzzy Sliding-Mode Control for a 3-DOF Serial-Parallel Hybrid Humanoid Arm

    Directory of Open Access Journals (Sweden)

    Yueling Wang

    2014-01-01

    Full Text Available This paper presents a unique ESO-based fuzzy sliding-mode controller (FSMC-ESO for a 3-DOF serial-parallel hybrid humanoid arm (HHA for the trajectory tracking control problem. The dynamic model of the HHA is obtained by Lagrange method and is nonlinear in dynamics with inertia uncertainty and external disturbance. The FSMC-ESO is based on the combination of the sliding-mode control (SMC, extended state observer (ESO theory, and fuzzy control (FC. The SMC is insensitive to both internal parameter uncertainties and external disturbances. The motivation for using ESO is to estimate the disturbance in real-time. The fuzzy parameter self-tuning strategy is proposed to adjust the switching gain on line according to the running state of the system. The stability of the system is guaranteed in the sense of the Lyapunov stability theorem. The effectiveness and robustness of the designed FSMC-ESO are illustrated by simulations.

  2. Coordinating a Service Supply Chain under Arms Offset Program’s Intervention by Performance-Based Contracting

    Directory of Open Access Journals (Sweden)

    Yi-Kuei Lin

    2016-01-01

    Full Text Available This paper investigates a support service supply chain for coordinating with a local third-party logistics provider by arms offset program’s intervention and develops a performance-based contracting framework for the coordinating problem, which remains scarce in the literatures. The performance-based contracting framework evaluates payments and profits for the support service by a game-theoretical approach with principal-agent model. We prove that the proposed framework is an effective tool in acquiring the balance between maximum profit and minimum payment for both parties in the coordinating problem without moral hazard issue. A numerical study consolidates the formulated schemes as contracting preference for both parties’ decision with a higher profit margin at a lower customer’s payment.

  3. 基于ARM的人眼疲劳监测系统%Eye Fatigue Monitoring System Based on ARM

    Institute of Scientific and Technical Information of China (English)

    曾强; 王玉; 赵娟; 王文廉; 张志杰

    2011-01-01

    根据监测系统车载、实时、非接触、小型化等要求,设计并实现了一种基于ARM+Linux的嵌入式实时疲劳监测系统.将图像数据预处理、算法参数优化、汇编优化和编译器优化等优化方法相结合,实现了快速的人脸检测,并通过移植OpenCV实现了基于PERCLOS的人眼疲劳检测算法.与基于PC和DSP的疲劳监测系统相比,该实时疲劳监测系统具有强大的网络功能以及更优越的扩展性.在室内环境下的实验结果表明,系统检测准确率达到95%.%According to the factor of vehicle, real-time, non-contact, small size, an ARM + Linux-based real-time fatigue monitoring system is designed and implemented. The fast face detection is implemented by means of integrating methods of image data preprocessing, the algorithm of the parameter optimization, assembly optimization, compiler optimization. The eye fatigue detection algorithm based on PERCLOS is achieved by migrating OpenCV. Compared with DSP-based and PC-based fatigue monitoring system in present, this real-time fatigue monitoring system has powerful network feature and better scalability. Experiment results demonstrate that the correct rate can reach 95% in indoor scene.

  4. A new concept of feature-based gauge for coordinate measuring arm evaluation

    Science.gov (United States)

    Cuesta, E.; González-Madruga, D.; Alvarez, B. J.; Barreiro, J.

    2014-06-01

    Articulated arm coordinate measuring machines (AACMM or CMA) have conquered a market share in the actual dimensional metrology field, overall when their role implies the inspection of geometrical and dimensional tolerances in an accurate 3D environment for medium-size parts. However, the unavoidable fact of AACMM manual operation constrains its reliability to a great extent, avoiding rigorous evaluation and casting doubt upon the usefulness of external calibration. In this research, a dimensional gauge especially aimed at AACMM evaluation has been developed. Furthermore, the operator skill will be revealed through the use of this gauge. A set of geometrical features, some of them oriented to evaluate the operator and others the equipment, have been collected for the gauge. The proposed evaluation methodology clearly distinguishes between dimensional and geometrical tolerances (with or without datum references), whereas actual verification standards only consider the former. Next, quality indicators deduced from the measurement results are proposed in order to compare AACMM versus coordinate measuring machine (CMM) performance, assuming that CMM possess the maximum accuracy that AACMM could reach, because CMM combines maximum contact accuracy with minimum operator influence. As a result, AACMM evaluation time could be significantly reduced since this gauge allows us to perform a customized evaluation of only those specific tolerances of interest to the user.

  5. Synthesis and gas adsorption properties of tetra-armed microporous organic polymer networks based on triphenylamine.

    Science.gov (United States)

    Yang, Xiao; Yao, Shuwen; Yu, Miao; Jiang, Jia-Xing

    2014-04-01

    Two novel tetra-armed microporous organic polymers have been designed and synthesized via a nickel-catalyzed Yamamoto-type Ullmann cross-coupling reaction or Suzuki cross-coupling polycondensation. These polymers are stable in various solvents, including concentrated hydrochloric acid, and are thermally stable. The homocoupled polymer YPTPA shows much higher Brunauer-Emmet-Teller-specific surface area up to 1557 m(2) g(-1) than the copolymer SPTPA (544 m(2) g(-1)), and a high CO2 uptake ability of 3.03 mmol g(-1) (1.13 bar/273 K) with a CO2 /N2 sorption selectivity of 17.3:1. Both polymers show high isosteric heats of CO2 adsorption (22.7-26.5 kJ mol(-1)) because the incorporation of nitrogen atoms into the skeleton of microporous organic polymers enhances the interaction between the pore wall and the CO2 molecules. The values are higher than those of the porous aromatic frameworks, which contain neither additional polar functional groups nor nitrogen atoms, and are rather close to those of previously reported microporous organic polymers containing the nitrogen atoms on the pore wall. These data show that these materials would be potential candidates for applications in post-combustion CO2 capture and sequestration technology.

  6. School-based use of a robotic arm system by children with disabilities.

    Science.gov (United States)

    Cook, Albert M; Bentz, Brenda; Harbottle, Norma; Lynch, Cheryl; Miller, Brad

    2005-12-01

    A robotic arm system was developed for use by children who had very severe motor disabilities and varying levels of cognitive and language skills. The children used the robot in a three-task sequence routine to dig objects from a tub of dry macaroni. The robotic system was used in the child's school for 12-15 sessions over a period of four weeks. Goal attainment scaling indicated improvement in all children in operational competence of the robot, and varying levels of gain in functional skill development with the robot and in carryover to the classroom from the robot experiments. Teacher interviews revealed gains in classroom participation, expressive language (vocalizations, symbolic communication), and a high degree of interest by the children in the robot tasks. The teachers also recommended that the robot should have more color, contrast and character, as well as generating sounds and/or music for student cues. They also felt that the robotic system accuracy should be increased so that teacher assistance is not necessary to complete the task.

  7. Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems

    Directory of Open Access Journals (Sweden)

    Johannes Rausch

    2016-01-01

    Full Text Available Objective. To demonstrate a novel approach of compensating overexposure artifacts in CT scans of the knees without attaching any supporting appliances to the patient. C-Arm CT systems offer the opportunity to perform weight-bearing knee scans on standing patients to diagnose diseases like osteoarthritis. However, one serious issue is overexposure of the detector in regions close to the patella, which can not be tackled with common techniques. Methods. A Kinect camera is used to algorithmically remove overexposure artifacts close to the knee surface. Overexposed near-surface knee regions are corrected by extrapolating the absorption values from more reliable projection data. To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates. Results. Artifacts at both knee phantoms are reduced significantly in the reconstructed data and a major part of the truncated regions is restored. Conclusion. The results emphasize the feasibility of the proposed approach. The accuracy of the cross-calibration procedure can be increased to further improve correction results. Significance. The correction method can be extended to a multi-Kinect setup for use in real-world scenarios. Using depth cameras does not require prior scans and offers the possibility of a temporally synchronized correction of overexposure artifacts. To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates.

  8. Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems.

    Science.gov (United States)

    Rausch, Johannes; Maier, Andreas; Fahrig, Rebecca; Choi, Jang-Hwan; Hinshaw, Waldo; Schebesch, Frank; Haase, Sven; Wasza, Jakob; Hornegger, Joachim; Riess, Christian

    2016-01-01

    Objective. To demonstrate a novel approach of compensating overexposure artifacts in CT scans of the knees without attaching any supporting appliances to the patient. C-Arm CT systems offer the opportunity to perform weight-bearing knee scans on standing patients to diagnose diseases like osteoarthritis. However, one serious issue is overexposure of the detector in regions close to the patella, which can not be tackled with common techniques. Methods. A Kinect camera is used to algorithmically remove overexposure artifacts close to the knee surface. Overexposed near-surface knee regions are corrected by extrapolating the absorption values from more reliable projection data. To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates. Results. Artifacts at both knee phantoms are reduced significantly in the reconstructed data and a major part of the truncated regions is restored. Conclusion. The results emphasize the feasibility of the proposed approach. The accuracy of the cross-calibration procedure can be increased to further improve correction results. Significance. The correction method can be extended to a multi-Kinect setup for use in real-world scenarios. Using depth cameras does not require prior scans and offers the possibility of a temporally synchronized correction of overexposure artifacts. To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates.

  9. Single SOC Test Challenge for Blu-ray DVD

    Institute of Scientific and Technical Information of China (English)

    Don Blair; Keita Gunji

    2005-01-01

    The Blu-ray DVD single chip SOC architecture, challenging high speed and high fidelity mixed signal test requirements and test solutions are introduced. COT reductions to make this a mass production low cost test approach is also described.

  10. Design of Crop Growing Environment Monitoring and Control System Based On ARM and ZIGBEE%基于 ARM 和 ZigBee 的农作物生长环境监控系统的设计

    Institute of Scientific and Technical Information of China (English)

    小玲; 唐四维; 陈立君; 郑龙

    2016-01-01

    The crop growth environment monitoring and control system consisted of host computer ARM and Zig-Bee wireless sensor and actuator network was developed in order to achieve the perception-decision-control of the agri-cultural production process.The ZigBee sensor and actuator network based on CC2530 is able to sample air temperature and humidity,soil temperature and moisture,light illumination intensity,carbon dioxide,water and soil pH,and water dissolved oxygen data,and adjust crop growth environment by means of actuators according to control command from ARM.ARM host computer system in which S5PV210 is used as control core and the corresponding monitoring soft-ware is programmed based on Linux,Qt and SQLite,can implement data transmission between ZigBee coordinator and ARM using UART/SPI serial communication,realize the processing,storage,and management of real-time data from sensor network nodes,and regularly send data to the remote computer center through 3G/LAN port.The test results show that the designed system can achieve the real-time monitoring and control of crop growing environment parame-ters and the data dynamic analysis,historical inquiry,and threshold warning,and the system has good stability and practicality.%为了实现农业生产过程的感知-决策-控制,开发了一套由 ARM 上位机和基于 ZigBee 的传感器/执行器网络构成的农作物生长环境监控系统。基于 CC2530的 ZigBee 传感器/执行器网络能实时采集空气温湿度、土壤温湿度、光照强度、二氧化碳、水质或土壤的 pH 值等数据,并根据 ARM 上位机指令控制执行器状态来调节农作物生长环境参数。以 S5PV210为控制核心、基于 Linux、Qt 和 SQLite 开发的 ARM 上位机系统能采用 UART/SPI 串口通信方式实现 ARM 与 ZigBee 协调器之间的数据传输,实时接收、处理、存储和管理来自传感器网络节点的数据,并定期将数据通过3G 或局域网口上传给远程计算

  11. ExpressionofSOCS3throughoutliverregeneration isnotregulatedbyDNAmethylation

    Institute of Scientific and Technical Information of China (English)

    Gang Guo; Jie Xia; Ji Bao; Huai-Qiang Sun; Yu-Jun Shi; Hong Bu

    2012-01-01

    BACKGROUND: While suppressor of cytokine signaling 3 (SOCS3) plays a crucial role in suppressing dysplasia and tumorigenesis, it also offers a typical instance of DNA methylation in the regulation of gene transcription, since the promoter region of the SOCS3 gene is rich in CpG islands (CGIs). During liver regeneration initiated by partial hepatectomy, SOCS3 acts as a suppressor to balance the acute-phase response and terminate the regeneration. This study aimed to determine whether the variation of SOCS3 expression throughout liver regeneration is also regulated by its DNA methylation. METHODS: We established a 70%partial hepatectomy mouse model and the animals were sacriifced at indicated times to assess the SOCS3 expression. We performed bisulifte sequencing PCR and DNA sequencing to investigate the detailed cytosine methylation in the SOCS3 gene. RESULTS:Within the promoter sequence, 58 CGIs were identiifed and 30 were found variously methylated before or after operation;however, methylation remained at a very low level. No evidence indicated that the total methylation level or the methylation of any CpG site regularly changed throughout liver regeneration. CONCLUSION: DNA methylation or demethylation seems to be a relatively stable modiifcation of cytosine, but not a dynamic and reversible process to regulate gene transcription in daily and acute pathophysiological events.

  12. Impact of vegetation types on soil organic carbon stocks SOC-S in Mediterranean natural areas

    Science.gov (United States)

    Parras-Alcántara, Luis; Lozano-García, Beatriz; Cantudo-Pérez, Marta

    2015-04-01

    Soils play a key role in the carbon geochemical cycle because they can either emit large quantities of CO2 or on the contrary they can act as a store for carbon. Agriculture and forestry are the only activities that can achieve this effect through photosynthesis and the carbon incorporation into carbohydrates (Parras-Alcántara et al., 2013). The Mediterranean evergreen oak Woodland (MEOW - dehesa) is a type of pasture with scattered evergreen and deciduous oak stands in which cereals are often grown under the tree cover. It is a system dedicated to the combined production of Iberian swine, sheep, fuel wood, coal and cork as well as to hunting. These semi-natural areas still preserve some of the primitive vegetation of the Mediterranean oak forests. The dehesa is a pasture where the herbaceous layer is comprised of either cultivated cereals such as oat, barley and wheat or native vegetation dominated by annual species, which are used as grazing resources. These Iberian open woodland rangelands (dehesas) have been studied from different points of view: hydrologically, with respect to soil organic matter content, as well as in relation to gully erosion, topographical thresholds, soil erosion and runoff production, soil degradation and management practices…etc, among others. The soil organic carbon stock capacity depends not only on abiotic factors such as the mineralogical composition and the climate, but also on soil use and management (Parras et al., 2014 and 2015). In Spanish soils, climate, use and management strongly affect the carbon variability, mainly in soils in dry Mediterranean climates characterized by low organic carbon content, weak structure and readily degradable soils. Hontoria et al. (2004) emphasized that the climate and soil use are two factors that greatly influence carbon content in the Mediterranean climate. This research sought to analyze the SOC stock (SOCS) variability in MEOW - dehesa with cereals, olive grove and Mediterranean oak forest

  13. Robot arm based flat panel CT-guided electromagnetic tracked spine interventions: phantom and animal model experiments

    Energy Technology Data Exchange (ETDEWEB)

    Penzkofer, Tobias; Isfort, Peter; Bruners, Philipp; Mahnken, Andreas H. [RWTH Aachen University, Applied Medical Engineering, Helmholtz-Institute Aachen, Aachen (Germany); RWTH Aachen University, Department of Diagnostic Radiology, Aachen University Hospital, Aachen (Germany); Wiemann, Christian; Guenther, Rolf W. [RWTH Aachen University, Department of Diagnostic Radiology, Aachen University Hospital, Aachen (Germany); Kyriakou, Yiannis; Kalender, Willi A. [Friedrich-Alexander University of Erlangen-Nuremberg, Institute for Medical Physics, Erlangen (Germany); Schmitz-Rode, Thomas [RWTH Aachen University, Applied Medical Engineering, Helmholtz-Institute Aachen, Aachen (Germany)

    2010-11-15

    To evaluate accuracy and procedure times of electromagnetic tracking (EMT) in a robotic arm mounted flat panel setting using phantom and animal cadaveric models. A robotic arm mounted flat panel (RMFP) was used in combination with EMT to perform anthropomorphic phantom (n = 90) and ex vivo pig based punctures (n = 120) of lumbar facet joints (FJ, n = 120) and intervertebral discs (IVD, n = 90). Procedure accuracies and times were assessed and evaluated. FJ punctures were carried out with a spatial accuracy of 0.8 {+-} 0.9 mm (phantom) and 0.6 {+-} 0.8 mm (ex vivo) respectively. While IVD punctures showed puncture deviations of 0.6 {+-} 1.2 mm (phantom) and 0.5 {+-} 0.6 mm (ex vivo), direct and angulated phantom based punctures had accuracies of 0.8 {+-} 0.9 mm and 1.0 {+-} 1.3 mm. Planning took longer for ex vivo IVD punctures compared to phantom model interventions (39.3 {+-} 17.3 s vs. 20.8 {+-} 5.0 s, p = 0.001) and for angulated vs. direct phantom FJ punctures (19.7 {+-} 5.1 s vs. 28.6 {+-} 7.8 s, p < 0.001). Puncture times were longer for ex vivo procedures when compared to phantom model procedures in both FJ (37.9 {+-} 9.0 s vs. 23.6 {+-} 7.2 s, p = 0.001) and IVD punctures (43.9 {+-} 16.1 s vs. 31.1 {+-} 6.4 s, p = 0.026). The combination of RMFP with EMT provides an accurate method of navigation for spinal interventions such as facet joint punctures and intervertebral disc punctures. (orig.)

  14. Virtual DC measuring instrument based on ARM%基于arm的虚拟直流电测量仪器

    Institute of Scientific and Technical Information of China (English)

    苏锦; 王震; 陈嘉丰

    2013-01-01

    A type of virtue instrument of A/D conversion DC measurement based on 4.5⁃bit BCD output was designed,so as to improve current measurement accuracy,and simplify the data acquisition and processing relative to DC. The ICL7135 chip with A/D conversion function is used to achieve DC data acquisition. The graphic user interface is Qt/E based on embedded linux. ARM9 embedded chip and Linux+Qt/E system are adopted for data processing and display. In software section,the modu⁃lariztion disgn is used for computer processing of data. The system has the advantages of strong anti work frequency interference performance,high measuring accuracy,rich interface,convenient application and great software function.%  为了提高直流电测量精度并简化直流电相关数据采集和处理的流程,设计了一种基于4位半BCD输出的A/D转换直流电测量虚拟仪器。该仪器测量采用了具有双积A/D转化的ICL7135芯片完成直流电数据采集,采用ARM9嵌入式芯片和Linux+Qt/E系统进行数据处理和显示。软件部分采用模块化设计,可以对数据进行多种计算机处理。该系统抗工频干扰性能好,测量精度高,接口丰富,系统应用方便,软件功能强大。相关的实验取得了预期良好的效果。

  15. Design and Implementation of EtherCAT Master Based on ARM + FPGA%基于ARM+FPGA的EtherCAT主站设计及实现

    Institute of Scientific and Technical Information of China (English)

    徐健; 唐小琦; 宋宝

    2016-01-01

    为解决实时工业以太网协议EtherCAT应用于嵌入式主站控制器所产生的实时性和稳定性等问题,首先研究了EtherCAT主站控制器在EtherCAT网络控制系统中的功能需求,分析并提出了实现嵌入式EtherCAT主站的架构,然后针对上述架构设计了基于ARM+FPGA的EtherCAT主站实现的硬件方案,并设计了基于Xenomai补丁的实时Linux操作系统的软件实现方案,最后搭建了互联互通的互操作性测试平台,实验结果表明,该主站控制器具有EtherCAT标准协议的兼容性、极高的实时性以及稳定性.

  16. 基于ARM ESL的AVS亮度插值的软硬件协同的研究%Integration of AVS luminance interpolation based on ARM ESL

    Institute of Scientific and Technical Information of China (English)

    何颖天; 祝永新

    2008-01-01

    提出一种基于ARM ESL平台的软硬件协同的设计方法,并进行了整个AVS解码系统的设计和仿真验证.在具体的软硬件划分中,通过采用硬件加速AVS亮度插值模块,合并了二分与四分之一亮度插值的软件算法, 并用DMA控制器改进插值的硬件结构,从而改善了系统的整体性能.实验中比较十帧720x576的AVS解码图像在原始纯软件环境,同软硬件协同系统的仿真结果.仿真结果说明新的AVS解码系统的体系结构提高了AVS解码系统的整体性能,为AVS系统的软硬件协同设计提供了有益的参照.

  17. Refining regional SOC estimates: Accounting for erosion induced within field variability of the vertical distribution of SOC.

    Science.gov (United States)

    Meersmans, Jeroen; Quine, Tim

    2013-04-01

    Recently, soil organic carbon (SOC) is considered as a dynamic soil property largely influencing soil quality and global C-cycling. Consequently, accurate mapping of SOC at the regional or national scale becomes an important issue in order to help policymakers in developing an appropriate soil and climate change management strategy. So far, in these studies, only factors determining the spatial and temporal distribution of SOC at the landscape scale, such as soil type, land use (change), climate and agro-management, were considered. Despite the fact that a few recent studies incorporated as well the distribution of SOC with depth, resulting in an improved representation of the 3D distribution of SOC, most studies only considers topsoil and/or are characterized by simple sampling by site at rather coarse resolution. Consequently, they omit quantification of stable subsoil carbon buried in depositional areas and does not allow to clearly identify significant differences of SOC and erosion at the within field scale. Hence, the variability of SOC at smaller scales in complex terrain driven by lateral soil transport processes (such as soil erosion), is still rather understudied and is not (well) presented in existing regional SOC estimates. Nevertheless, incorporating this smaller level of spatial detail will most probably have a major influence on SOC mapping and regional SOC stock dynamics' calculations. Consequently, there exists an urgent need in conducting an appropriate soil sampling strategy considering deeper layers and enabling us to detect significant patterns at detailed spatial levels. In this study we aim to unravel the variation of SOC depth distributions along typical hillslope transects under cropland (Devon, UK) and link these to soil redistribution rates and variations in C input, i.e. below and above ground biomass productivity. The radionuclide isotope Caesium-137 (137Cs) was used as proxy for erosion. Furthermore, a soil sampling strategy was

  18. EXPRESSION OF SOCS3 AND SOCS5 MRNAS IN PERIPHERAL BLOOD MONONUCLEARS FROM THE PATIENTS WITH BRONCHIAL ASTHMA

    Directory of Open Access Journals (Sweden)

    V. V. Lim

    2014-01-01

    Full Text Available We observed sixty patients with allergic bronchial asthma (ABA and 54 with non-allergic bronchial asthma (NABA. Quantitative SOCS3 and SOCS5 mRNA expression was evaluated by means of real-time PCR. Eighteen healthy persons served as a control group. In patients with bronchial asthma (irrespectively of pathogenetic form, a significant increase of SOCS3 transcription factor expression was detected in peripheral blood mononuclears, as compared with control group. This increase was more pronounced in NABA group. The mRNA SOCS5 level was significantly decreased in bronchial asthma patients, as compared to control group, especially, in ABA subgroup rather than in NABA patients. Thus, an increased expression of SOCS3 mRNA in BA patients could be regarded as a protective antiinflammatory response Decrease of SOCS5 mRNA expression in patients with bronchial asthma (being more pronounced in ABA, may be indicative for a deficiency in negative feedback regulation of gene transcription in allergic bronchial asthma.

  19. Image Processing Based on ARM Embedded Operating System%基于 ARM 嵌入式操作系统的图像处理*

    Institute of Scientific and Technical Information of China (English)

    左春雪; 吉喆明; 黄小红

    2015-01-01

    无人清扫机器人是通过感知外界环境信息,传输到主控制器,实现自我决策并进行自主导航和壁障的。针对这个情况,论文通过A RM嵌入式操作系统和视觉检测系统对所拍摄图像进行边缘检测。以微控制器S3C2440为核心通过可输出标准的数字图像信号OV7670图像传感器对图像进行采集、通过邻域平均法对图像进行预处理和通过Sobel算子对图像边缘进行检测,为了进一步提高视觉检测系统的实时性和可靠性,在ARM上移植了嵌入式Red Hat 9.0 Linux操作系统,并通过U‐boot对bootloade进行移植,作为嵌入式操作系统中一段启动代码,起到引导加载启动程序的任务。在嵌入式Linux操作系统中,完成了视觉系统中邻域平均法图像预处理和Sobel边缘检测算子的软件设计。最后通过系统的软硬件调试,实时的显示出所拍摄图像的边缘,为无人清扫机器人提供了视觉信息。%Unmanned cleaning robots through the perception of external environment information ,transfer to the main controller ,and realize self decision ,autonomous navigation and walls .Aiming at this situation ,the paper demonstrates a fact the detecting photograph image edge through the ARM embedded operating system and visual inspection system . S3C2440 is considered as the core controller ,through an OV7670 image sensor that can produce digital image signal acquiring the image ,through the neighborhood averaging method preprocessing the image and through Sobel operator detecting the im‐age edge .In order to further improve the real‐time performance and reliability of the visual inspection system ,we transplant the embedded Red Hat Linux 9 .0 operating system on the ARM ,completing the neighborhood averaging method in visual system image preprocessing and Sobel edge detection operator in the software design .Finally ,by system software and hard‐ware debugging ,we can acquire real

  20. Cardiac C-arm CT: 4D non-model based heart motion estimation and its application

    Science.gov (United States)

    Prümmer, M.; Fahrig, R.; Wigström, L.; Boese, J.; Lauritsch, G.; Strobel, N.; Hornegger, J.

    2007-03-01

    The combination of real-time fluoroscopy and 3D cardiac imaging on the same C-arm system is a promising technique that might improve therapy planning, guiding, and monitoring in the interventional suite. In principal, to reconstruct a 3D image of the beating heart at a particular cardiac phase, a complete set of X-ray projection data representing that phase is required. One approximate approach is the retrospectively ECG-gated FDK reconstruction (RG-FDK). From the acquired data set of N s multiple C-arm sweeps, those projection images which are acquired closest in time to the desired cardiac phase are retrospectively selected. However, this approach uses only 1/ N s of the obtained data. Our goal is to utilize data from other cardiac phases as well. In order to minimize blurring and motion artifacts, cardiac motion has to be compensated for, which can be achieved using a temporally dependent spatial 3D warping of the filtered-backprojections. In this work we investigate the computation of the 4D heart motion based on prior reconstructions of several cardiac phases using RG-FDK. A 4D motion estimation framework is presented using standard fast non-rigid registration. A smooth 4D motion vector field (MVF) represents the relative deformation compared to a reference cardiac phase. A 4D deformation regridding by adaptive supersampling allows selecting any reference phase independently of the set of phases used in the RG-FDK for a motion corrected reconstruction. Initial promising results from in vivo experiments are shown. The subjects individual 4D cardiac MVF could be computed from only three RG-FDK image volumes. In addition, all acquired projection data were motion corrected and subsequently used for image reconstruction to improve the signal-to-noise ratio compared to RG-FDK.

  1. Control of reach extent with the paretic and nonparetic arms after unilateral sensorimotor stroke: kinematic differences based on side of brain damage.

    Science.gov (United States)

    Stewart, Jill Campbell; Gordon, James; Winstein, Carolee J

    2014-07-01

    Scaling of reach kinematics to targets that vary in distance is indicative of the use of planning and feedback-based adjustments. The control of reach extent, however, has not been reported for the paretic arm after stroke. The purpose of this study was to determine whether individuals post-stroke utilized planning (scaling acceleration magnitude) and feedback-based adjustments (scaling acceleration duration) to reach to targets that varied in distance. Individuals with mild-to-moderate motor impairment after stroke and nondisabled adults reached with both arms to targets presented at three distances (8, 16, 24 cm). Kinematic data were used to determine scaling of peak acceleration magnitude and duration to target distance and compared between arms (control, nonparetic, paretic). Despite differences in the magnitude of movement variables, individuals post-stroke utilized both planning and feedback-based adjustments to meet the demands of the task with the nonparetic and paretic arms in a similar manner as controls. However, there was variability in the use of planning with the paretic arm, some individuals utilized planning while others did not. After right brain damage, differences in reach control related to the specialized role this hemisphere plays in endpoint control were found in both arms; no hemisphere-specific changes were found after left brain damage (LBD). The appearance of hemispheric-specific effects after right but not LBD were not due to age, degree of motor impairment, or time post-stroke, but, instead, may be related to relative differences in visual-motor processing ability, lesion characteristics, or interhemispheric inhibition changes between groups.

  2. Dynamics and fate of SOC in tidal marshes along a salinity gradient (Scheldt estuary, Belgium)

    Science.gov (United States)

    Van de Broek, Marijn; Temmermann, Stijn; Merckx, Roel; Wang, Zhengang; Govers, Gerard

    2016-04-01

    Coastal ecosystems have been attributed the potential to store large amounts of organic carbon (OC), often referred to as blue carbon, of which a considerable amount is stored in tidal marsh soils. Large uncertainties still exist with respect to the amount and controlling factors of soil organic carbon (SOC) stored in these ecosystems. Moreover, most research has focused on SOC dynamics of saltmarshes, while brackish and freshwater marshes are often even more productive and thus receive even larger organic carbon inputs. Therefore, in this study the OC dynamics of tidal marsh soils along an estuarine gradient are studied in order to contribute to our knowledge of 1) the stocks, 2) the controlling factors and 3) the fate of SOC in tidal marshes with different environmental characteristics. This research thus contributes to a better understanding of the potential of coastal environments to store organic carbon under future climatic changes. Soil and vegetation samples are collected in tidal salt-, brackish- and freshwater marshes in the Scheldt estuary (Belgium - The Netherlands). At each tidal marsh, three replicate soil cores up to 1.5m depth in 0.03m increments are collected at locations with both a low and a high elevation. These cores are analyzed for OC, stable C and N isotopes, bulk density and texture. Incubation experiments of topsoil samples were conducted and both aboveground and belowground biomass were collected. The results show that SOC stocks (range: 13,5 - 35,4 kg OC m-2), standing biomass (range: 2000 - 7930 g DW m-2) and potential soil respiration of CO2 (range: 0,03 - 0,12 % per unit OC per day) decrease with increasing salinity. This shows that both the amount of OC from local macrophytes and the quality of the organic matter are important factors controlling the SOC stocks. In addition, based on the analysis of stable C and N isotopes, it appears that when a significant fraction of SOC is derived from local macrophytes, higher SOC stocks are

  3. Design of Communication Interface between ARM and DSP Based on Dual-port RAM%基于双口RAM的ARM与DSP通信接口设计

    Institute of Scientific and Technical Information of China (English)

    操虹; 李臻; 贾洪钢

    2012-01-01

    提出了一种基于双口RAM的ARM与DSP通信接口的设计方案.该接口以ARM为主处理器、DSP为协处理器,ARM通过在Linux系统上建立的DSP任务管理线程实现DSP任务的管理和调度工作,DSP完成ARM下发的数据计算和处理工作,两者通过双口RAM交换数据.实际应用表明,该接口充分利用了两个处理器的功能特性,数据传输速度快,适用于ARM与DSP间需要进行大量数据交换的场合.%The paper proposed a design scheme of communication interface between ARM and DSP based on dual port RAM. The interface takes ARM as main processor and DSP as coprocessor. ARM is used to realize management and dispatching work of DSP tasks through tasks management thread of DSP built on Linux system, and DSP is used to realize data calculation and processing work sent by ARM. The both exchange data through dual-port RAM. The actual application showed that the interface fully uses function characteristics of the two processors with quick data transmission speed, which is suitable for situation with the need for large acounts of data exchange between ARM and DSP.

  4. Multiple Identifications in Multi-Armed Bandits

    CERN Document Server

    Bubeck, Sébastien; Viswanathan, Nitin

    2012-01-01

    We study the problem of identifying the top $m$ arms in a multi-armed bandit game. Our proposed solution relies on a new algorithm based on successive rejects of the seemingly bad arms, and successive accepts of the good ones. This algorithmic contribution allows to tackle other multiple identifications settings that were previously out of reach. In particular we show that this idea of successive accepts and rejects applies to the multi-bandit best arm identification problem.

  5. The Research and Design for the Embedded System Based on ARM9%基于ARM9的嵌入式系统研究及设计

    Institute of Scientific and Technical Information of China (English)

    薛凌燕; 杨吉宏; 李凌云; 郑志新

    2009-01-01

    为适应嵌入式技术在现代工业及电子等更多领域的广泛应用,通过对ARM9嵌入式微处理器芯片S3C2410的研究,设计出基于S3C2410核心板的嵌入式系统开发底板,更多的需求及功能可在其底板上进行扩展与实现.首先对ARM9嵌入式微处理器S3C2410进行介绍,然后给出了基于S3C2410核心板的嵌入式系统开发底板的设计与功能扩展,包括开发板总体设计,电源模块设计,各种通信模块设计如串口、JTAG接口、网络接口、CAN总线通信接口等.该模板的设计实现了嵌入式系统在更多更广泛领域应用的灵活性.%To adapting for the embedded technology's application widely in the modern industry, electron and so on,it is the design for the embedded system exploitation motherboard based on S3C2410 core board through the research on ARM9 embedded microprocessor S3C2410. More demand and function can extend and come true on the motherboard. Firstly, introduce ARM9 embedded microprocessor S3C2410. Then introduce the design for the embedded system exploitation motherboard based on S3C2410 core board and the function extend, including exploitation motherboards' collectivity design, power supply design, all kinds of communication module design, such as serial interface, JTAG interface, network interface, CAN bus communication interface and so on. The motherboard's design has realized the embedded system application's flexibility.

  6. Architecture Design of Computing Intensive SoCs

    Institute of Scientific and Technical Information of China (English)

    YUE Yao; ZHANG Chunming; WANG Haixin; BAI Guoqiang; CHEN Hongyi

    2009-01-01

    Most existing system-on-chip (SoC) architectures are for microprocessor-centric designs. They are not suitable for computing intensive SoCs, which have their own configurability, extendibility, perform-ance, and data exchange characteristics. This paper analyzes these characteristics and gives design princi-ples for computing intensive SoCs. Three architectures suitable for different situations are compared with selection criteria given. The architectural design of a high performance network security accelerator (HPNSA) is used to elaborate on the design techniques to fully exploit the performance potential of the ar-chitectures. A behavior-level simulation system is implemented with the C++ programming language to evaluate the HPNSA performance and to obtain the optimum system design parameters. Simulations show that this architecture provides high performance data transfer.

  7. A control system of mobile navigation robot for precise spraying based ultrasonic detecting and ARM embedded technologies

    Science.gov (United States)

    Tang, Xiuying; Li, Cuiling; Wang, Xiu; Yue, Xinpeng; Peng, Yankun

    2011-06-01

    This paper described a control system of mobile navigation robot for precision spraying in greenhouse environment, which were composed of main control module, motor driving module, ultrasonic detecting module and wirless remote control module. The hard circuits of control system were built. The main control module used ARM7TDMI-S-based LPC2210 micro-processing controller. The motor driving module consisted of voltage amplifier circuit based SN74LS245N and DM74LS244N chips, RC filter circuit, and HM-YZ-30 DC brush motor driver. The ultrasonic detecting module consisted of four standard ultrasonic ranging modules which were arranged on the four sides around the mobile navigation robot, and used GM8125 chip to expand serial communication interfaces. An obstacle-avoiding strategy and its algorithm were proposed and the control programs of mobile navigation robot were programmed. The mobile navigation robot for spraying can realize the actions such as starting and stopping, forward and backward moving, accelerate and decelerate motion, and right and left turn. Finally, the functional experiments of the mobile navigation robot were conducted in the laboratory environment. The results showed that the ultrasonic detecting distance of the robot was 50.5mm-1832.0mm and detecting blind zone was less than 50mm, the ultrasonic detecting angle of individual ultrasonic detecting module of robot was similar to U-shaped and its vaule was about 45.66°, and the moving path of navigation robot was approximately linear.

  8. Evaluation of Arm Processor-based Bionic Intelligent Controller for a Buck-boost Converte

    Directory of Open Access Journals (Sweden)

    M.V. Mini

    2015-07-01

    Full Text Available This study focuses on performance-comparison of different tuning methods for a PI controller applied to a buck-boost converter. Comparison between the controllers is made by analysis of design methodology implementation issues and empirically measured performance. Design of PI controller is based on frequency response of the converter. The optimization of PI controller is based on ant colony algorithm. Experimental results show that, tuning the PI controller using ACO algorithm gave better performance than the conventional algorithm. This is mainly due to the fact ACO is capable of reducing the overshoot without oscillation.

  9. Wearable Medical Devices' MCU Selection Analysis Based on the ARM Cortex-M0+ Architecture%基于ARM Cortex-M0+内核的穿戴式医疗设备MCU选型分析

    Institute of Scientific and Technical Information of China (English)

    吴灶全; 刘梦星; 秦丽平; 叶树明; 陈杭

    2015-01-01

    According to the characteristics of low cost, high performance, high integration and long battery life of wearable medical devices, the mainstream low-power microcontroler(MCU) series were compared, and came to the conclusion that the MCU series based on ARM Cortex-M0+ architecture were suitable for the development of wearable medical devices. In aspects of power consumption, operational performance, integrated peripherals and cost, the MCU series based on Cortex-M0+ architecture of primary semiconductor companies were compared, aimed at providing the guides of MCU selection for wearable medical devices.%根据穿戴式医疗设备低成本、高性能、高集成度和续航时间长的特点,对比了当前主流的低功耗微控制器(MCU)系列,分析得出ARM? Cortex M0+内核的MCU系列适合该领域的产品开发.在功耗水平、运算性能、外设集成和产品成本等方面,进一步将各大半导体公司基于Cortex M0+内核的MCU系列展开参数对比,为穿戴式医疗设备的MCU选型提供指南.

  10. Molecular Cloning, Characterization, and Expression of MiSOC1: A Homolog of the Flowering Gene SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 from Mango (Mangifera indica L)

    Science.gov (United States)

    Wei, Junya; Liu, Debing; Liu, Guoyin; Tang, Jie; Chen, Yeyuan

    2016-01-01

    MADS-box transcription factor plays a crucial role in plant development, especially controlling the formation and development of floral organs. Mango (Mangifera indica L) is an economically important fruit crop, but its molecular control of flowering is largely unknown. To better understand the molecular basis of flowering regulation in mango, we isolated and characterized the MiSOC1, a putative mango orthologs for the Arabidopsis SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1/AGAMOUS-LIKE 20 (SOC1/AGL20) with homology-based cloning and RACE. The full-length cDNA (GenBank accession No.: KP404094) is 945 bp in length including a 74 bp long 5′ UTR and a 189 bp long 3′ UTR and the open reading frame was 733 bps, encoding 223 amino acids with molecular weight 25.6 kD. Both sequence alignment and phylogenetic analysis all indicated that deduced protein contained a conservative MADS-box and semi-conservative K domain and belonged to the SOC1/TM3 subfamily of the MADS-box family. Quantitative real-time PCR was performed to investigate the expression profiles of MiSOC1 gene in different tissues/organs including root, stem, leaves, flower bud, and flower. The result indicated MiSOC1 was widely expressed at different levels in both vegetative and reproductive tissues/organs with the highest expression level in the stems’ leaves and inflorescences, low expression in roots and flowers. The expression of MiSOC1 in different flower developmental stages was different while same tissue –specific pattern among different varieties. In addition, MiSOC1 gene expression was affect by ethephon while high concentration ethephon inhibit the expression of MiSOC1. Overexpression of MiSOC1 resulted in early flowering in Arabidopsis. In conclusion, these results suggest that MiSOC1 may act as induce flower function in mango. PMID:27965680

  11. Robust EMG sensing system based on data fusion for myoelectric control of a robotic arm

    OpenAIRE

    2009-01-01

    Abstract Background Myoelectric control of a robotic manipulator may be disturbed by failures due to disconnected electrodes, interface impedance changes caused by movements, problems in the recording channel and other various noise sources. To correct these problems, this paper presents two fusing techniques, Variance Weighted Average (VWA) and Decentralized Kalman Filter (DKF), both based on the myoelectric signal variance as selecting criterion. Methods Tested in five volunteers, a redunda...

  12. ARM Lead Mentor Selection Process

    Energy Technology Data Exchange (ETDEWEB)

    Sisterson, DL

    2013-03-13

    The ARM Climate Research Facility currently operates more than 300 instrument systems that provide ground-based observations of the atmospheric column. To keep ARM at the forefront of climate observations, the ARM infrastructure depends heavily on instrument scientists and engineers, also known as Instrument Mentors. Instrument Mentors must have an excellent understanding of in situ and remote-sensing instrumentation theory and operation and have comprehensive knowledge of critical scale-dependent atmospheric processes. They also possess the technical and analytical skills to develop new data retrievals that provide innovative approaches for creating research-quality data sets.

  13. Taxation, stateness and armed groups

    DEFF Research Database (Denmark)

    Hoffmann, Kasper; Vlassenroot, Koen; Marchais, Gauthier

    2016-01-01

    rackets, to the material reciprocation of the recognition of rights. Focusing on the taxation practices of armed groups, the article argues that taxation is at the core of armed groups’ production of public authority and citizenship, and that their modes of taxation are based on long-standing registers...... of authority and practices of rule that originate in the colonial era. In particular, the article shows that by appealing to both local customary and national forms of political community and citizenship, armed groups are able to assume public authority to tax civilians. However, their public authority may...

  14. Authentication System for Smart Homes Based on ARM7TDMI-S and IRIS-Fingerprint Recognition Technologies

    Directory of Open Access Journals (Sweden)

    Fredrick R. Ishengoma

    2014-12-01

    Full Text Available With the rapid advancement in technology, smart homes have become applicable and so the need arise to solve the security challenges that are accompanied with its operation. Passwords and identity cards have been used as traditional authentication mechanisms in home environments, however, the rise of misuse of these mechanisms are proving them to be less reliable. For instance, ID cards can be misplaced, copied or counterfeited and being misused. Conversely, studies have shown that biometrics authentication systems particularly Iris Recognition Technology (IRT and Fingerprint Recognition Technology (FRT have the most reliable mechanisms to date providing tremendous accuracy and speed. As the technology becomes less expensive, application of IRT& FRT in smart-homes becomes more reliable and appropriate solution for security challenges. In this paper, we present our approach to design an authentication system for smart homes based on IRT, FRT and ARM7TDMI-S.The system employs two biometrics mechanisms for high reliability whereby initially, system users must enroll their fingerprints and eyes into the camera. Iris and fingerprint biometrics are scanned and the images are stored in the database. In the stage of authentication, FRT and IRT fingerprint scan and analyze points of the user's current input iris and fingerprint and match with the database contents. If one or more captured images do not match with the one in the database, then the system will not give authorization.

  15. Design and development of C-arm based cone-beam CT for image-guided interventions: initial results

    Science.gov (United States)

    Chen, Guang-Hong; Zambelli, Joseph; Nett, Brian E.; Supanich, Mark; Riddell, Cyril; Belanger, Barry; Mistretta, Charles A.

    2006-03-01

    X-ray cone-beam computed tomography (CBCT) is of importance in image-guided intervention (IGI) and image-guided radiation therapy (IGRT). In this paper, we present a cone-beam CT data acquisition system using a GE INNOVA 4100 (GE Healthcare Technologies, Waukesha, Wisconsin) clinical system. This new cone-beam data acquisition mode was developed for research purposes without interfering with any clinical function of the system. It provides us a basic imaging pipeline for more advanced cone-beam data acquisition methods. It also provides us a platform to study and overcome the limiting factors such as cone-beam artifacts and limiting low contrast resolution in current C-arm based cone-beam CT systems. A geometrical calibration method was developed to experimentally determine parameters of the scanning geometry to correct the image reconstruction for geometric non-idealities. Extensive phantom studies and some small animal studies have been conducted to evaluate the performance of our cone-beam CT data acquisition system.

  16. Design of ultrasonic wave anemometer with high precision based on ARM + CPLD%基于ARM+CPLD的高精度超声波风速仪的设计

    Institute of Scientific and Technical Information of China (English)

    吴宗玲; 闫连山; 曾德兵; 陈娟子

    2012-01-01

    The principle of measurement of wind speed and direction using ultrasonic wave time difference method is introduced followed by related algorithms, the design of ultrasonic wave anemometer based on ARM +CPLD is described in details. In addition, an effective algorithm dealing with the average wind direction problems near 0° (360°) is proposed. An absolute wind speed measurement model is provided using a baroceptor for practical wind measurement applications. The designed ultrasonic wave anemometer has important reference application value in environmental monitoring and wind power generation.%分析了运用超声波时差法测量风速风向的基本原理,介绍了风速风向的相关算法,重点给出了基于ARM +CPLD的超声波风速风向仪原型设计.同时提出了一种处理0°(360°)附近平均风向问题的算法,结合实际运用(风力发电)给出了一种运用气压传感器进行绝对风速测量的理论模型.所设计的超声波风速风向仪对环境监测和风力发电等具有重要的参考应用价值.

  17. 基于ARM Cortex M3内核TFT触摸屏无线遥控设计%On Wireless Remote Control System Design Based on the ARM Cortex M3 core TFT Touch Screen

    Institute of Scientific and Technical Information of China (English)

    李金赐; 梁九兴

    2012-01-01

    The designing is based on Bluetooth communication through the ARM Contex M3 core microprocessor STM32F103VET6 and TEF color LCD touch screen to design a touch-screen remote control.This kind of remote control,through touching the controls displayed on the TFT color LCD of the host computer,triggers variety of control signals and then wireless Bluetooth module sends control signals.%本设计是建立在蓝牙通信下通过ARM Cortex M3内核的微处理器STM32F103VET6与TFT彩色液晶触摸屏来设计一种触摸屏遥控器。该遥控器通过触摸上位机TFT彩色液晶触摸屏上显示的各个控件来触发各种控制信号;无线蓝牙模块发送各种控制信号。

  18. Automatic Control System for Refining Sugarcane Based on Embedded ARM-Linux and ZigBee%基于ARM-Linux和ZigBee的自动煮糖数据采集系统

    Institute of Scientific and Technical Information of China (English)

    王敦锋; 朱名日; 庾志衡; 周信东

    2011-01-01

    According to the special environment of refining; sugarcane production line,a RT data sugar-refine control platform of wireless sensor network based on Zigbee and arm-linux technology was built. The problems of traditional cable data acquisition system such as high cost.poor scalabiliiy of monitoring node,bad mobility were solved. A new way was achieved for the process automation of refinining sugar. The test result shows that the system runs well, and completely meets the requirements of produccion process.%针对糖厂煮糖制炼生产线的特殊环境,利用ZigBee和嵌入式ARM-Linux技术,构建了1个实时的蔗糖制炼无线传感器网络控制平台,有效解决传统的有线数据采集系统存在的成本较高、监控点扩充性差、移动性较差等问题,为实现煮糖过程的自动化提供了手段.测试表明,系统运行良好,能够满足工艺的要求.

  19. Terminal Hardware Design of Police Based on ARM Cortex-A8 Platform%基于ARM Cortex-A8平台的警务终端硬件设计

    Institute of Scientific and Technical Information of China (English)

    庹云凤; 江先阳

    2011-01-01

    基于ARM Cortex-A8平台研究设计的警务终端,利用当前热门的嵌入式技术与3G无线通信技术,帮助交通警察及公安警察进行交通管理及犯罪活动的打击。警务终端的主要功能包括3G手机功能、电子地图功能、高清拍照功能、驾照及其他二维条码证件扫描验证功能、二代身份证验证功能、IC卡识别功能、银联无线支付功能等。%Based on ARM Cortex-A8 platform,designed to police the terminal study, the use of current technology and popular embedded 3G wireless communications technology to help police and public security traffic management and traffic police crack down on criminal activities.The main function of the police end features including 3G mobile phones,electronic map function,high-definition camera,driver's license and other two-dimensional bar code scanning documents,authentication features,the second generation ID card authentication,IC card recognition, CUP wireless payment functions.

  20. Parametric motion control of robotic arms: A biologically based approach using neural networks

    Science.gov (United States)

    Bock, O.; D'Eleuterio, G. M. T.; Lipitkas, J.; Grodski, J. J.

    1993-01-01

    A neural network based system is presented which is able to generate point-to-point movements of robotic manipulators. The foundation of this approach is the use of prototypical control torque signals which are defined by a set of parameters. The parameter set is used for scaling and shaping of these prototypical torque signals to effect a desired outcome of the system. This approach is based on neurophysiological findings that the central nervous system stores generalized cognitive representations of movements called synergies, schemas, or motor programs. It has been proposed that these motor programs may be stored as torque-time functions in central pattern generators which can be scaled with appropriate time and magnitude parameters. The central pattern generators use these parameters to generate stereotypical torque-time profiles, which are then sent to the joint actuators. Hence, only a small number of parameters need to be determined for each point-to-point movement instead of the entire torque-time trajectory. This same principle is implemented for controlling the joint torques of robotic manipulators where a neural network is used to identify the relationship between the task requirements and the torque parameters. Movements are specified by the initial robot position in joint coordinates and the desired final end-effector position in Cartesian coordinates. This information is provided to the neural network which calculates six torque parameters for a two-link system. The prototypical torque profiles (one per joint) are then scaled by those parameters. After appropriate training of the network, our parametric control design allowed the reproduction of a trained set of movements with relatively high accuracy, and the production of previously untrained movements with comparable accuracy. We conclude that our approach was successful in discriminating between trained movements and in generalizing to untrained movements.

  1. The effects of a home-based arm ergometry exercise programme on physical fitness, fatigue and activity in polio survivors: protocol for a randomised controlled trial

    Directory of Open Access Journals (Sweden)

    Murray Deirdre

    2012-12-01

    Full Text Available Abstract Background Many Polio survivors have reduced mobility, pain and fatigue, which make access to conventional forms of aerobic exercise difficult. Inactivity leads to increased risk of health problems, many of which are prevalent among Polio survivors. Aerobic exercise programmes in Polio survivors should utilise stable muscle groups and should be designed to minimise exacerbation of pain and fatigue. A home-based arm ergometry aerobic exercise programme may represent an affordable and accessible exercise modality, incorporating exercise prescription principles in this group. Methods/design This is a prospective, single blinded, randomised controlled trial. There are two arms; exercise intervention using arm ergometers and control. Polio survivors meeting eligibility criteria will be recruited and randomly allocated to intervention or control groups. Participants allocated to the intervention group will receive a small arm ergometer and a polar heart rate monitor. They will carry out a home-based moderate intensity (50-70% HRMax aerobic exercise programme for eight weeks, following instruction by the treating physiotherapist. Assessments will occur at baseline and after eight weeks and will include tests of physical fitness, activity, energy cost of walking, fatigue and quality of life. Clinically feasible assessment tools including the Six Minute Arm Test, the Physical Activity Scale for People with Physical Disabilities questionnaire, the Physiological Cost Index, Fatigue Severity Scale and the SF-36v2 will be utilised. Discussion The efficacy of a home-based arm ergometry programme in Polio survivors will be examined. No previous trial has examined such a programme using a wide range of outcome measures pertinent to Polio survivors. This study will provide new information on the impact of arm ergometry on physical fitness, activity, body composition, fatigue, pain, muscle strength, and health related quality of life. Also, the study

  2. Electromagnetic field-based navigation for percutaneous punctures on C-arm CT: experimental evaluation and clinical application

    Energy Technology Data Exchange (ETDEWEB)

    Meyer, Bernhard C.; Peter, Olaf; Frericks, Bernd B.; Wolf, Karl-Juergen [Charite - University Hospital, Campus Benjamin Franklin, Department of Radiology and Nuclear Medicine, Berlin (Germany); Nagel, Markus [CAS innovations AG, Erlangen (Germany); Hoheisel, Martin [Siemens Healthcare, Forchheim (Germany); Wacker, Frank K. [Charite - University Hospital, Campus Benjamin Franklin, Department of Radiology and Nuclear Medicine, Berlin (Germany); The Johns Hopkins Hospital, Radiology Department, Division of Vascular and Interventional Radiology, Baltimore, MD (United States)

    2008-12-15

    The aim of this study was to prospectively evaluate the needle visualization and placement error and use of an electromagnetic field-based tracking navigation device for puncture procedures based on C-arm CT (CACT) images. A commercially available navigation device was mounted on an angiographic X-ray system setup for CACT. After the target was defined, needle placement was performed under real-time visualization of the virtual needle in CACT images. The final, real needle position was assessed by CACT. Punctures were performed in phantoms (n = 76) and in twelve patients (eight biopsies, three drainages, one injection). Procedure times, system error, user error and total error were assessed. In phantoms, mean total error was 2.3 {+-} 0.9 mm, user error was 1.4 {+-} 0.8 mm and system error was 1.7 {+-} 0.8 mm. In the patient study, the targeted puncture was successful in all twelve cases. The mean total error was 5.4 mm {+-} 1.9 mm (maximum 8.1 mm), user error was 3.7 {+-} 1.7 mm, system error was 3.2 {+-} 1.4 mm and mean skin-to-target time was less than 1 min. The navigation device relying on CACT was accurate in terms of needle visualization and useful for needle placement under both experimental and clinical conditions. For more complex procedures, electromagnetic field-based tracking guidance might be of help in facilitating the puncture and reducing both the puncture risk and procedure time. (orig.)

  3. Electromagnetic field-based navigation for percutaneous punctures on C-arm CT: experimental evaluation and clinical application.

    Science.gov (United States)

    Meyer, Bernhard C; Peter, Olaf; Nagel, Markus; Hoheisel, Martin; Frericks, Bernd B; Wolf, Karl-Jürgen; Wacker, Frank K

    2008-12-01

    The aim of this study was to prospectively evaluate the needle visualization and placement error and use of an electromagnetic field-based tracking navigation device for puncture procedures based on C-arm CT (CACT) images. A commercially available navigation device was mounted on an angiographic X-ray system setup for CACT. After the target was defined, needle placement was performed under real-time visualization of the virtual needle in CACT images. The final, real needle position was assessed by CACT. Punctures were performed in phantoms (n = 76) and in twelve patients (eight biopsies, three drainages, one injection). Procedure times, system error, user error and total error were assessed. In phantoms, mean total error was 2.3 +/- 0.9 mm, user error was 1.4 +/- 0.8 mm and system error was 1.7 +/- 0.8 mm. In the patient study, the targeted puncture was successful in all twelve cases. The mean total error was 5.4 mm +/- 1.9 mm (maximum 8.1 mm), user error was 3.7 +/- 1.7 mm, system error was 3.2 +/- 1.4 mm and mean skin-to-target time was less than 1 min. The navigation device relying on CACT was accurate in terms of needle visualization and useful for needle placement under both experimental and clinical conditions. For more complex procedures, electromagnetic field-based tracking guidance might be of help in facilitating the puncture and reducing both the puncture risk and procedure time.

  4. Oilwell Monitoring and Control based on Wireless Sensor Networks using ARM

    Directory of Open Access Journals (Sweden)

    V. Viknesh Velavan

    2012-09-01

    Full Text Available The existing oil-pumping unit (OPU system has a high power consuming process. It has the incapability of OPU’s structural health monitoring. A sensor network based intelligent control is proposed for power economy and efficient oilwell health monitoring using wireless sensor network. The proposed system consists of three-level sensors: First level sensors (FLS – designed with a temperature sensor, a voltage sensor, a current sensor, level sensor, gas sensor and a pressure sensor used for oilwell data sensing. Intelligent sensors (IS - designed mainly for an oilwell’s data elementary processing, main fault alarm indication, typical storage/indication, data/status transmission up to the third level sensor (TLS, data/status transmission between IS, and command transmission down to the OPU motor. Third level sensors (TLS - Software-defined (SD control centres with an embedded database. The TLS are designed for hundreds of oilwell’s data storage/management, data processing malfunction detection, malfunction alarm/indication; stroke-adjustment command transmission down to a specific IS for power economy and the malfunction report to the maintenance staff. Timer, Keyboard, A/D, communicationinterruptions are controlled by intelligent sensor. Delay aware data collection network structure is used for power economy and to reduce time delay in wireless sensor networks.

  5. Reliability Assessment Based on Design and Manufacturing Tolerances for Control Burst Mechanism of Small Arms

    Directory of Open Access Journals (Sweden)

    S.K. Basu

    1997-10-01

    Full Text Available Very often specified tolerance is made greater than process tolerance, depending upon (i the manufacturing process capability, and (ii the 'aspiration level' of the designer in effecting a specified tolerance. This applies to multiple components merging into an assembly. In assembly tolerance, errors due to mating are inherent. Common errors arise due to clearance, misalignment in planes and distortion that may cause side stack. Such errors affect the functional performance of the subsystem and consequently become the main cause of failure. Probability distribution of the assembly tolerance and probability distribution of stacked up tolerance of the Components in actual practice leave a common zone of interaction, based on which the in-built reliability changes. From the designer's tolerance, one may have an idea about the 'aspiration level' of assembly tolerance stacking error. Assuming both these parameters, viz., actual stacking error and designer's aspiration level of stacking error to follow the normal probability distribution, it is possible to get the reliability of the product assembly. The paper presents a real life case study for assessing the reliability of sub-assembly at the initial stages of development for control burst mechanism (CBM of rifle.

  6. An Infrastructural IP for Interactive MPEG-4 SoC Functional Verification

    Directory of Open Access Journals (Sweden)

    Trio Adiono

    2009-05-01

    Full Text Available This paper introduces a specific architecture including an infrastructural IP for functional verification and diagnostics, which is suitable for functional core-based testing of an MPEG4 SoC. Our advanced MPEG4 SoC results in a high complexity SoC with limited physical access to many different functional cores. The proposed test method provides direct monitoring and control for each core, which enables core verification at actual speed. It significantly decreases the verification time due to the large number of required test vectors in typical MPEG4 verification. Furthermore, it also makes the system scalable for functional core expansion due to upgrading of standards. The proposed infrastructural IP is also linked to PC-based interactive tools to simplify the verification of individual and integrated cores. It also provides detailed diagnostic data that enables simple system debugging. The debugging tools also feature test-pattern generation and simulation of expected values. Actual system implementation has shown full functionality of our proposed method.

  7. An Infrastructural IP for Interactive MPEG-4 SoC Functional Verification

    Directory of Open Access Journals (Sweden)

    Trio Adiono

    2013-09-01

    Full Text Available This paper introduces a specific architecture including an infrastructural IP for functional verification and diagnostics, which is suitable for functional core-based testing of an MPEG4 SoC. Our advanced MPEG4 SoC results in a high complexity SoC with limited physical access to many different functional cores. The proposed test method provides direct monitoring and control for each core, which enables core verification at actual speed. It significantly decreases the verification time due to the large number of required test vectors in typical MPEG4 verification. Furthermore, it also makes the system scalable for functional core expansion due to upgrading of standards. The proposed infrastructural IP is also linked to PC-based interactive tools to simplify the verification of individual and integrated cores. It also provides detailed diagnostic data that enables simple system debugging. The debugging tools also feature test-pattern generation and simulation of expected values. Actual system implementation has shown full functionality of our proposed method.

  8. Correct-by-construction approaches for SoC design

    CERN Document Server

    Sinha, Roopak; Basu, Samik

    2013-01-01

    This book describes an approach for designing Systems-on-Chip such that the system meets precise mathematical requirements. The methodologies presented enable embedded systems designers to reuse intellectual property (IP) blocks from existing designs in an efficient, reliable manner, automatically generating correct SoCs from multiple, possibly mismatching, components.

  9. SOCS proteins in regulation of receptor tyrosine kinase signaling

    DEFF Research Database (Denmark)

    Kazi, Julhash U.; Kabir, Nuzhat N.; Flores Morales, Amilcar;

    2014-01-01

    . The signaling mediated by RTKs must be tightly regulated by interacting proteins including protein-tyrosine phosphatases and ubiquitin ligases. The suppressors of cytokine signaling (SOCS) family proteins are well-known negative regulators of cytokine receptors signaling consisting of eight structurally similar...

  10. Analog and mixed signal test techniques for SoCs

    NARCIS (Netherlands)

    Kerkhoff, Hans G.; Kaminska, Bozena

    2003-01-01

    Submicron technologies, enabling the implementation of SoC's, are gaining acceptance and this represents a major step forward in design and test complexity. As a result, new tools and development flows are needed that will be able to handle the greater design and test challenges of increasingly smal

  11. Balance maintenance in high-speed motion of humanoid robot arm-based on the 6D constraints of momentum change rate.

    Science.gov (United States)

    Zhang, Da-song; Xiong, Rong; Wu, Jun; Chu, Jian

    2014-01-01

    Based on the 6D constraints of momentum change rate (CMCR), this paper puts forward a real-time and full balance maintenance method for the humanoid robot during high-speed movement of its 7-DOF arm. First, the total momentum formula for the robot's two arms is given and the momentum change rate is defined by the time derivative of the total momentum. The author also illustrates the idea of full balance maintenance and analyzes the physical meaning of 6D CMCR and its fundamental relation to full balance maintenance. Moreover, discretization and optimization solution of CMCR has been provided with the motion constraint of the auxiliary arm's joint, and the solving algorithm is optimized. The simulation results have shown the validity and generality of the proposed method on the full balance maintenance in the 6 DOFs of the robot body under 6D CMCR. This method ensures 6D dynamics balance performance and increases abundant ZMP stability margin. The resulting motion of the auxiliary arm has large abundance in joint space, and the angular velocity and the angular acceleration of these joints lie within the predefined limits. The proposed algorithm also has good real-time performance.

  12. Accuracy of x-ray image-based 3D localization from two C-arm views: a comparison between an ideal system and a real device

    Science.gov (United States)

    Brost, Alexander; Strobel, Norbert; Yatziv, Liron; Gilson, Wesley; Meyer, Bernhard; Hornegger, Joachim; Lewin, Jonathan; Wacker, Frank

    2009-02-01

    arm X-ray imaging devices are commonly used for minimally invasive cardiovascular or other interventional procedures. Calibrated state-of-the-art systems can, however, not only be used for 2D imaging but also for three-dimensional reconstruction either using tomographic techniques or even stereotactic approaches. To evaluate the accuracy of X-ray object localization from two views, a simulation study assuming an ideal imaging geometry was carried out first. This was backed up with a phantom experiment involving a real C-arm angiography system. Both studies were based on a phantom comprising five point objects. These point objects were projected onto a flat-panel detector under different C-arm view positions. The resulting 2D positions were perturbed by adding Gaussian noise to simulate 2D point localization errors. In the next step, 3D point positions were triangulated from two views. A 3D error was computed by taking differences between the reconstructed 3D positions using the perturbed 2D positions and the initial 3D positions of the five points. This experiment was repeated for various C-arm angulations involving angular differences ranging from 15° to 165°. The smallest 3D reconstruction error was achieved, as expected, by views that were 90° degrees apart. In this case, the simulation study yielded a 3D error of 0.82 mm +/- 0.24 mm (mean +/- standard deviation) for 2D noise with a standard deviation of 1.232 mm (4 detector pixels). The experimental result for this view configuration obtained on an AXIOM Artis C-arm (Siemens AG, Healthcare Sector, Forchheim, Germany) system was 0.98 mm +/- 0.29 mm, respectively. These results show that state-of-the-art C-arm systems can localize instruments with millimeter accuracy, and that they can accomplish this almost as well as an idealized theoretical counterpart. High stereotactic localization accuracy, good patient access, and CT-like 3D imaging capabilities render state-of-the-art C-arm systems ideal devices for X

  13. Multiuser Test System Based on FPGA and ARM%基于FPGA和ARM的多用户测试系统

    Institute of Scientific and Technical Information of China (English)

    张文亭; 张曙光; 乔庐峰; 陈庆华

    2011-01-01

    Because of the characteristics of small volume, low power, low cost and flexible design that the system has, the design and implementation of multiuser test system based on Field Programmable Gate Array(FPGA) and Advanced RISC Machines(ARM) is introduced in this paper. It can satisfy the specific needs of Asynchronous Transfer Mode(ATM) lest. Because of the console based on Web users as long as access this network can operation the test system, which solves the problem of people can not test on the same time because it is expensive. With the characteristics of small volume, low power, low cost and flexible design that the system can satisfy the specific needs of high speed ATM test. Test show it can satisfy the need of high-speed transmission and exchange equipment.%针对现有异步转移模式测试仪器通用性弱、成本高等局限性,设计基于现场可编程门列阵和嵌入式ARM的多用户测试系统.采用基于Web的监控台,使得用户只要接入网络就能通过Web页面对待测设备进行测试,从而解决专用测试仪表不能多地多人同时测试的问题.测试结果表明,该设计具有体积小、成本低、设计灵括等特点,可以满足专用高速传输和交换设备的测试需求.

  14. Influenza A virus inhibits type I IFN signaling via NF-kappaB-dependent induction of SOCS-3 expression.

    Directory of Open Access Journals (Sweden)

    Eva-K Pauli

    2008-11-01

    Full Text Available The type I interferon (IFN system is a first line of defense against viral infections. Viruses have developed various mechanisms to counteract this response. So far, the interferon antagonistic activity of influenza A viruses was mainly observed on the level of IFNbeta gene induction via action of the viral non-structural protein 1 (NS1. Here we present data indicating that influenza A viruses not only suppress IFNbeta gene induction but also inhibit type I IFN signaling through a mechanism involving induction of the suppressor of cytokine signaling-3 (SOCS-3 protein. Our study was based on the observation that in cells that were infected with influenza A virus and subsequently stimulated with IFNalpha/beta, phosphorylation of the signal transducer and activator of transcription protein 1 (STAT1 was strongly reduced. This impaired STAT1 activation was not due to the action of viral proteins but rather appeared to be induced by accumulation of viral 5' triphosphate RNA in the cell. SOCS proteins are potent endogenous inhibitors of Janus kinase (JAK/STAT signaling. Closer examination revealed that SOCS-3 but not SOCS-1 mRNA levels increase in an RNA- and nuclear factor kappa B (NF-kappaB-dependent but type I IFN-independent manner early in the viral replication cycle. This direct viral induction of SOCS-3 mRNA and protein expression appears to be relevant for suppression of the antiviral response since in SOCS-3 deficient cells a sustained phosphorylation of STAT1 correlated with elevated expression of type I IFN-dependent genes. As a consequence, progeny virus titers were reduced in SOCS-3 deficient cells or in cells were SOCS-3 expression was knocked-down by siRNA. These data provide the first evidence that influenza A viruses suppress type I IFN signaling on the level of JAK/STAT activation. The inhibitory effect is at least in part due to the induction of SOCS-3 gene expression, which results in an impaired antiviral response.

  15. Self-assembled targeted nanoparticles based on transferrin-modified eight-arm-polyethylene glycol–dihydroartemisinin conjugate

    Science.gov (United States)

    Liu, Kefeng; Dai, Lin; Li, Chunxiao; Liu, Jing; Wang, Luying; Lei, Jiandu

    2016-07-01

    Poor delivery of insoluble anticancer drugs has so far precluded their clinical application. In this study, an efficient tumor targeted-nanoparticle delivery system, transferrin-eight-arm-polyethylene glycol–dihydroartemisinin nanoparticles (TF-8arm-PEG-DHA NPs) for the vehiculation of dihydroartemisinin (DHA) was first prepared and evaluated for its targeting efficiency and cytotoxicity in vitro and in vivo to Lewis lung carcinoma (LLC) cells, which overexpress transferrin receptors (TFRs). The synthesized TF-8arm-PEG–DHA NPs had high solubility (~102 fold of free DHA), relatively high drug loading (~10 wt% DHA), long circulating half-life and moderate particle size (~147 nm). The in vitro cytotoxicity and in vivo tumor growth inhibition studies in LLC-tumor bearing mice confirmed the enhanced efficacy of TF-modified 8arm-PEG-DHA NPs compared to free DHA and non-modified 8arm-PEG-DHA NPs. All these results together supported that the formulation developed in this work exhibited great potential as an effective tumor targeting delivery system for insoluble anticancer drugs.

  16. 基于ARM+GMR三轴数字指南针系统设计与实现%Design and Implementation of the Three Axis Digital Compass System Based on ARM+GMR

    Institute of Scientific and Technical Information of China (English)

    邵玫; 谢尚剑; 王桂棠

    2014-01-01

    This paper introduces a three axis digital compass system based on GMR and acceleration sensors. The system uses the high-precision amplifier LM2904 as the signal conditioning circuit, the low power, high frequency, ARM-based microprocessor S3C6410 to complete AD conversion, azimuth calculation and digital output. The QT is used to achieve a friendly user interface. The paper introduces the working principle of electronic compass realization of hardware and software design, proposes the feasibility correction scheme based on analysis of deviation caused by the influence of magnetic material. Experiments show that the electronic compass can accurately measure the azimuth angle, and good real-time performance, low power consumption, stable operation, and can be used for ordinary navigation field.%介绍一种基于GMR传感器和加速度传感器的三轴数字指南针系统及实现,采用LM2904放大器完成信号调理,应用ARM11架构的微处理器S3C6410完成A/D转换、方位角计算及数字化输出等;应用QT实现友好的用户交互界面。着重论述数字指南针的工作原理、硬件及软件的实现,分析磁性物质影响所带来误差,并提出可行性的矫正方案。实验表明:该数字指南针能够准确测出方位航向角,且实时性好、功耗低、运行稳定,可用于普通导航领域。

  17. Design of Embedded Wireless Home Security System Based on ARM9 and ZigBee%基于ARM9和ZigBee的嵌入式无线家庭安防系统的设计

    Institute of Scientific and Technical Information of China (English)

    胡玮; 孙福明

    2010-01-01

    介绍了基于嵌入式Linux系统的ARM9平台和ZigBee技术的家庭安防系统.ZigBee模块组成无线网络与ARM9控制器相连,ARM9控制器驱动摄像头捕捉图片并将图片通过SIM300模块发送彩信通知给用户.

  18. A Generalized SOC-OCV Model for Lithium-Ion Batteries and the SOC Estimation for LNMCO Battery

    Directory of Open Access Journals (Sweden)

    Caiping Zhang

    2016-11-01

    Full Text Available A state-of-charge (SOC versus open-circuit-voltage (OCV model developed for batteries should preferably be simple, especially for real-time SOC estimation. It should also be capable of representing different types of lithium-ion batteries (LIBs, regardless of temperature change and battery degradation. It must therefore be generic, robust and adaptive, in addition to being accurate. These challenges have now been addressed by proposing a generalized SOC-OCV model for representing a few most widely used LIBs. The model is developed from analyzing electrochemical processes of the LIBs, before arriving at the sum of a logarithmic, a linear and an exponential function with six parameters. Values for these parameters are determined by a nonlinear estimation algorithm, which progressively shows that only four parameters need to be updated in real time. The remaining two parameters can be kept constant, regardless of temperature change and aging. Fitting errors demonstrated with different types of LIBs have been found to be within 0.5%. The proposed model is thus accurate, and can be flexibly applied to different LIBs, as verified by hardware-in-the-loop simulation designed for real-time SOC estimation.

  19. Influence of directional solidification variables on primary dendrite arm spacing of Ni-based superalloy DZ125

    Institute of Scientific and Technical Information of China (English)

    Zhang Weiguo; Liu Lin; Huang Taiwen; Zhao Xinbao; Qu Min; Yu Zhuhuan; Fu Hengzhi

    2009-01-01

    The primary dendrite morphology and spacing of DZ125 superalloy have been observed during directional solidification under high thermal gradient about 500 K/cm. The results reveal that the primary dendrite arm spacing decreases from 94 μm to 35.8 μm with the increase of directional solidification cooling rate from 2.525 K/s to 36.4 K/s. The regression equation of the primary dendrite arm spacings λ1 versus cooling rate is λ1=0.013(GV)-0.32. The predictions of Kurz/Fisher model and Hunt/Lu model accord reasonably well with the experimental data. The influence of directional solidification rate under variable thermal gradient on the primary dendrite arm spacing has also been investigated.

  20. Influence of directional solidification variables on primary dendrite arm spacing of Ni-based superalloy DZ125

    Directory of Open Access Journals (Sweden)

    Zhang Weiguo

    2009-11-01

    Full Text Available The primary dendrite morphology and spacing of DZ125 superalloy have been observed during directional solidifi cation under high thermal gradient about 500 K/cm. The results reveal that the primary dendrite arm spacing decreases from 94 μm to 35.8 μm with the increase of directional solidifi cation cooling rate from 2.525 K/s to 36.4 K/s. The regression equation of the primary dendrite arm spacings λ1 versus cooling rate is λ1=0.013(GV-0.32. The predictions of Kurz/Fisher model and Hunt/Lu model accord reasonably well with the experimental data. The infl uence of directional solidifi cation rate under variable thermal gradient on the primary dendrite arm spacing has also been investigated.

  1. The Investigation and exploitation of Embedded GUI base on ARM-LINUX%基于ARM-LINUX嵌入式GUI的研究与开发

    Institute of Scientific and Technical Information of China (English)

    唐敏; 赵正红; 林昕

    2012-01-01

    物联网技术的兴起为为嵌入式图形用户界面开发提供了契机,本文首先介绍了几种常用嵌入式系统下的图形用户界面系统,其中MiniGUI和Qt/Embedded是两款典型的图形用户界面系统,详细描述了这两款嵌入式GUI开发平台的构建过程,同时给出了以MiniGUI为图形界面的开发案例。%The developments of the internet of things technology give potential opportunities to the exploitation of embedded graphic user interface. First the paper compares several GUI technologies under embedded systems, MiniGUI and Qt/Embedded are typical graphic user interface, secondly describes the process of building up environment base on Qt/Embedded and MiniGUI, in the end ,in troducing the exploitation process of MiniGUI with an example.

  2. The USB Host Driver Development Based on ARM7%基于ARM7的USB主机驱动开发

    Institute of Scientific and Technical Information of China (English)

    王昊; 吴旭光; 牛云; 肖鼎新

    2012-01-01

    Most of the products for embedded devices do not have USB host functionality, this article analyzes the framework of the USB system based on μC/OS- I . The structure to LPC2478 example describes the embedded USB host driver implementation process, the driver through the JTAG simulation, on the compliance agreement, high-capacity USB storage class device realized U disk drive, so it provides an efficient way to integrate the embedded USB host feature for the embedded end-products.%针对嵌入式终端产品中大多不具备USB主机功能,分析了基于μC/OS-Ⅱ的USB系统的框架结构,以LPC2478为实例描述了嵌入式USB主机驱动程序的实现过程,驱动程序通过了JTAG仿真测试,对遵从大容量类存储协议的USB设备U盘实现了驱动,从而为在嵌入式终端产品中集成USB主机功能提供了有效途径.

  3. A Cryptographic SoC for Robust Protection of Secret Keys in IPTV DRM Systems

    Science.gov (United States)

    Lee, Sanghan; Yang, Hae-Yong; Yeom, Yongjin; Park, Jongsik

    The security level of an internet protocol television (IPTV) digital right management (DRM) system ultimately relies on protection of secret keys. Well known devices for the key protection include smartcards and battery backup SRAMs (BB-SRAMs); however, these devices could be vulnerable to various physical attacks. In this paper, we propose a secure and cost-effective design of a cryptographic system on chip (SoC) that integrates the BB-SRAM with a cell-based design technique. The proposed SoC provides robust safeguard against the physical attacks, and satisfies high-speed and low-price requirements of IPTV set-top boxes. Our implementation results show that the maximum encryption rate of the SoC is 633Mb/s. In order to verify the data retention capabilities, we made a prototype chip using 0.18µm standard cell technology. The experimental results show that the integrated BB-SRAM can reliably retain data with a 1.4µA leakage current.

  4. Dynamic power management for UML modeled applications on multiprocessor SoC

    Science.gov (United States)

    Kukkala, Petri; Arpinen, Tero; Setälä, Mikko; Hännikäinen, Marko; Hämäläinen, Timo D.

    2007-02-01

    The paper presents a novel scheme of dynamic power management for UML modeled applications that are executed on a multiprocessor System-on-Chip (SoC) in a distributed manner. The UML models for both application and architecture are designed according to a well-defined UML profile for embedded system design, called TUT-Profile. Application processes are considered as elementary units of distributed execution, and their mapping on a multiprocessor SoC can be dynamically changed at run-time. Our approach on the dynamic power management balances utilized processor resources against current workload at runtime by (1) observing the processor and workload statistics, (2) re-evaluating the amount of required resources (i.e. the number of active processors), and (3) re-mapping the application processes to the minimum set of active processors. The inactive processors are set to a power-save state by using clock-gating. The approach integrates the well-known power management techniques tightly with the UML based design of embedded systems in a novel way. We evaluated the dynamic power management with a WLAN terminal implemented on a multiprocessor SoC on Altera Stratix II FPGA containing up to five Nios II processors and dedicated hardware accelerators. Measurements proved up to 21% savings in the power consumption of the whole FPGA board.

  5. The Design and Implementation of Heterogeneous Multi-platform Based on ARM9%基于ARM9的多协议异构开发平台的设计与实现

    Institute of Scientific and Technical Information of China (English)

    严冬; 丁世佳; 贺政; 罗立

    2014-01-01

    本文提出了基于ARM9的多协议异构开发平台的硬件设计方案,研制物联网多协议网关样机,屏蔽硬件细节差异,对不同硬件平台功能模块提供统一调用接口,传感网研究所使用的频段主要分布在433MHz (433 MHz -434.79 MHz)、470 MHz (470 MHz -510 MHz)、780MHz (779 MHz-787 MHz)、2.4GHz (2.4 GHz-2.4835 GHz)频段上,WSN子网物理层通过上述四个频段接入网关。网关的传感网一侧支持IEEE 802.15.4标准和IEEE 802.11标准,另一侧支持以太网及Internet,TD-SCDMA等3G移动通信网等。%In this paper, the design of heterogeneous multi-platform, based on ARM9, is proposed. The research is based on multi-protocol gateway prototype, which shields hardware details in different hardware platforms and provides the same function module interfaces. The band is mainly distributed in the 433MHz (433 MHz -434.79 MHz), 470 MHz (470 MHz -510 MHz), 780MHz (779 MHz -787 MHz), 2.4GHz (2.4 GHz -2.4835 GHz), WSN physical subnet layer can be accessed into gateway in above four bands. IEEE 802.15.4 standard and the IEEE 802.11 standard will be supported on one side of gateway, at the same time, Ethernet and Internet, TD-SCDMA and other 3G mobile communications network is supported on the other side.

  6. MobiIe InteIIigent TerminaI Access ControI System Based on ARM-Linux and Wi-Fi%ARM Linux与WiFi的移动智能终端门禁系统设计

    Institute of Scientific and Technical Information of China (English)

    赵思蕊; 吴亚东; 杨文超; 蒋宏宇

    2015-01-01

    设计了一种基于嵌入式 ARM Linux平台和 Wi Fi通信的移动智能终端门禁系统,包括门禁装置和用户移动智能终端设备,其中门禁装置采用S3 C6410处理器,并以嵌入式 Linux为软件开发平台。移动智能终端设备则作为用户开门凭据,基于 Android系统开发门禁 APP,实现用户身份认证、注册和开门功能。测试结果表明,与现有门禁系统相比,该设计在安全性、可操作性和成本上有明显优势。%An access control system of mobile intelligent terminal based on ARM-Linux platform and Wi-Fi communication is designed, which includes access control device and user mobile intelligentx terminal equipment.The access control device uses S3C6410 processor and embedded Linux as the software development platform.Mobile intelligent terminal device is the proof of opening door,mobile intelli-gent terminal development access APP base on Android,which realizes the functions of user authentication,registration,and opening door.Results of the test indicate that the program design has obvious advantages on security,easy operation and low cost compared with the existing techniques and solutions.

  7. ARM-microcontroller based portable nitrite electrochemical analyzer using cytochrome c reductase biofunctionalized onto screen printed carbon electrode.

    Science.gov (United States)

    Santharaman, Paulraj; Venkatesh, Krishna Arun; Vairamani, Kanagavel; Benjamin, Alby Robson; Sethy, Niroj K; Bhargava, Kalpana; Karunakaran, Chandran

    2017-04-15

    Nitrite (NO2(-)) supplementation limits hypoxia-induced oxidative stress and activates the alternate NO pathway which may partially account for the nitrite-mediated cardioprotection. So, sensitive and selective biosensors with point-of-care devices need to be explored to detect the physiological nitrite level due to its important role in human pathophysiology. In this work, cytochrome c reductase (CcR) biofunctionalized self assembled monolayer (SAM) functionalized on gold nanoparticles (GNPs) in polypyrrole (PPy) nanocomposite onto the screen printed carbon electrode (SPCE) was investigated as a biosensor for the detection of nitrite based on its electrochemical and catalytic properties. CcR was covalently coupled with SAM layers on GNPs by using EDC and NHS. Direct electrochemical response of CcR biofunctionalized electrodes showed a couple of well-defined and nearly reversible cyclic voltammetric peaks at -0.34 and -0.45 vs. Ag/AgCl. Under optimal conditions, the biosensor could be used for the determination of NO2(-) with a linear range from 0.1-1600µm and a detection limit of 60nM with a sensitivity of 0.172µAµM(-1)cm(-2). Further, we have designed and developed a novel and cost effective portable electrochemical analyzer for the measurement of NO2(-) in hypoxia induced H9c2 cardiac cells using ARM microcontroller. The results obtained here using the developed portable electrochemical nitrite analyzer were also compared with the standard cyclic voltammetry instrument and found in agreement with each other.

  8. 基于 ARM 的桌面型3D打印机控制系统设计%Design of desktop 3D printer control system based on ARM

    Institute of Scientific and Technical Information of China (English)

    谭秀腾; 郭小定; 李小龙; 余亮

    2014-01-01

    针对基于单片机为控制器的桌面型3D打印机控制系统中存在的处理速度慢、片外芯片多、电路复杂、打印质量不高等问题,设计了基于ARM为控制器的桌面型3D打印机控制系统。系统采用了NXP公司推出的基于ARM Cortex-M3内核的LPC1768微控制器,用它进行与上位机通信、数据处理、模拟量采集与处理、信号控制,选用A4988专用两相步进电机驱动器实现步进电机细分驱动,简化步进电机细分驱动的设计,行程开关电路采用GK152红外光电传感器。软件采用了PID方式调节加热床、挤出机加热温度。文中论述了控制系统主要硬件电路设计和软件的实现流程,系统测试表明性能良好。%The desktop 3D printer control systems with a sigle-chip controller have problems of slow processing speed, more pieces of outside chips, circuit complexity and poor quality of printing.To solve these problems, a desktop 3D printer control system with an ARM controller is designed.The system employs the LPC1768 microcon-troller based on ARM Cortex-M3 core which is introduced by the NXP and used to communicate with the host com-puter, data processing, analog acquisition and processing, signal control, used A4988 special two-phase stepper motor driver to implement stepper motor subdivision drive and to simplify the drive design for stepping motor.The travel switch circuit adopts GK152 infrared photoelectric sensor.The software adopted PID method in order to adjust the heating temperature of heating bed and extruder.This paper discusses the main hardware circuit design and soft-ware realization process of the control system.The System testing shows good performance.

  9. Kinematic analysis of arm and trunk movements in the gait of Parkinson's disease patients based on external signals.

    Science.gov (United States)

    Son, Hohee; Kim, Eunjung

    2015-12-01

    [Purpose] To investigate the role of external cues on arm swing amplitude and trunk rotation in Parkinson's disease. [Subjects and Methods] The subjects were 13 elderly patients with Parkinson's disease. Subjects walked under four different conditions in a random order: no cue, visual cue, auditory cue, and combined cue. The auditory cue velocity consisted of a metronome beat 20% greater than the subject's general gait speed. For the visual cue condition, bright yellow colored strips of tape placed on the floor at intervals equal to 40% of each subject's height. A motion analysis system was used to measure arm swing amplitude and trunk rotation during walking. [Results] There was a significant difference in the kinematic variables (arm swing amplitude) between different cues, but there was not a significant difference in the kinematic variables with respect to the trunk rotation. [Conclusion] The findings of this study indicate that patients with Parkinson's disease are likely to focus attention on auditory cues. The measurement of arm and trunk kinematics during gait by auditory cues can increase the available methods for the analysis of complex motor programs in movement disorders.

  10. Neural-Dynamic-Method-Based Dual-Arm CMG Scheme With Time-Varying Constraints Applied to Humanoid Robots.

    Science.gov (United States)

    Zhang, Zhijun; Li, Zhijun; Zhang, Yunong; Luo, Yamei; Li, Yuanqing

    2015-12-01

    We propose a dual-arm cyclic-motion-generation (DACMG) scheme by a neural-dynamic method, which can remedy the joint-angle-drift phenomenon of a humanoid robot. In particular, according to a neural-dynamic design method, first, a cyclic-motion performance index is exploited and applied. This cyclic-motion performance index is then integrated into a quadratic programming (QP)-type scheme with time-varying constraints, called the time-varying-constrained DACMG (TVC-DACMG) scheme. The scheme includes the kinematic motion equations of two arms and the time-varying joint limits. The scheme can not only generate the cyclic motion of two arms for a humanoid robot but also control the arms to move to the desired position. In addition, the scheme considers the physical limit avoidance. To solve the QP problem, a recurrent neural network is presented and used to obtain the optimal solutions. Computer simulations and physical experiments demonstrate the effectiveness and the accuracy of such a TVC-DACMG scheme and the neural network solver.

  11. Motor imagery, P300 and error-related EEG-based robot arm movement control for rehabilitation purpose.

    Science.gov (United States)

    Bhattacharyya, Saugat; Konar, Amit; Tibarewala, D N

    2014-12-01

    The paper proposes a novel approach toward EEG-driven position control of a robot arm by utilizing motor imagery, P300 and error-related potentials (ErRP) to align the robot arm with desired target position. In the proposed scheme, the users generate motor imagery signals to control the motion of the robot arm. The P300 waveforms are detected when the user intends to stop the motion of the robot on reaching the goal position. The error potentials are employed as feedback response by the user. On detection of error the control system performs the necessary corrections on the robot arm. Here, an AdaBoost-Support Vector Machine (SVM) classifier is used to decode the 4-class motor imagery and an SVM is used to decode the presence of P300 and ErRP waveforms. The average steady-state error, peak overshoot and settling time obtained for our proposed approach is 0.045, 2.8% and 44 s, respectively, and the average rate of reaching the target is 95%. The results obtained for the proposed control scheme make it suitable for designs of prosthetics in rehabilitative applications.

  12. Differential Effects of Conservational Management on SOC Accumulation in the Grasslands of China.

    Science.gov (United States)

    Zhang, Ping; Tang, Jie; Sun, Wenjuan; Yu, Yongqiang; Zhang, Wen

    2015-01-01

    Conservational management practices in grasslands have been considered one of the efficient options to enhance the soil organic carbon (SOC) accumulation. However, the SOC changes after the conservational management practices vary significantly under different grassland vegetation types and the environmental conditions. At present, it is not clear how the SOC accumulation changes along the soil profile if conservational management practice was adopted. In this study, we collected 663 paired observational data of SOC changes with and without conservational management practices in grasslands of China from 176 published literatures that has both the surface (0‒20 cm) and subsurface (to 40 cm depth) SOC measurements. The differences of SOC density (SOCD) between pre‒management and post‒management in the vertical soil layers were analyzed in order to establish a quantitative relationship of the SOC changes between the subsurface and the surface. The results revealed that in all grasslands, conservational management practices benefits the SOC accumulation by enhancing 0.43‒1.14 Mg C ha-1 yr-1. But the SOC increment weakened downwards along the soil profile. While the surface SOC was enhanced by 17% after conservational management, the subsurface SOC was enhanced by only 7%. The SOC accumulation was closely correlated with restoration duration, pre-management SOCD and the environmental factors and differed greatly among different grasslands and the practices adopted. The alpine and mountain grassland showed a higher annual SOC increment than the temperate grassland with the annual rate of 1.62 and 0.72 Mg C ha-1 yr-1, respectively. The SOC increment caused by the artificial plantation and the grazing exclusion conservational management was more than 2-fold that of the cropland abandonment and the extensive utilization. With the quantitative relationship of the SOC changes between soil layers, we provide a methodological option to estimate SOC changes to layers

  13. Design of embedded intelligent home control system based on Arm-Linux%基于Arm-Linux的嵌入式智能家居控制系统的设计

    Institute of Scientific and Technical Information of China (English)

    谭涛; 徐晓辉; 黄晓亮; 王盟; 温阳

    2011-01-01

    随着嵌入式技术、网络及信息技术的发展,针对人们对智能家居的追求.提出了一种基于ARM9的嵌入式智能家居控制系统的解决方案.介绍了嵌入式Linux系统的软硬件平台,结合实例阐述了嵌入式QT图形界面系统、嵌入式数据库SQLite等关键技术在嵌入式智能家居控制系统中的应用.该方案解决了控制系统的可视化操作问题,提高了系统数据管理效率,并具有通用性可移植到其他硬件或软件平台应用.%With the development of embedded technology,network and information technology,for the pursuit for the intelligent home,a projection of embedded intelligent home controlling systems is proposed based on ARM9.It describes the software and hardware platforms of embedded Linux systems,explains the appliance on embedded intelligent home controlling systems of key technologies such as embedded QT graphical interface system and embedded database SQLite with examples. The projection solves the problem of visual operations,and improve the efficiency of data management,what's more,it is universal portable to other hardware and software platforms to be applied.

  14. A Fast Method to Build Embedded System Development Environment Based on ARM Linux%基于ARM Linux嵌入式系统开发环境的快速构建方法*

    Institute of Scientific and Technical Information of China (English)

    陶维成; 姚学军

    2015-01-01

    In recent years , the embedded systems were widely applied in mobile intelligent , internet of things, and wearable computing emerging field etc .As the development environment for embedded system is more complicated than for PC , and there is not such integrated development environment ( IDE) at home and a-broad, this paper built an embedded system development environment based on the ARM S 3C2440 development board as a development platform , and Linux 2.4 or more as operating system.Finally, the development platform was tested with an LED character device driver as an example .%近年来,嵌入式系统广泛应用于移动智能、物联网、可穿戴计算等新兴领域.由于嵌入式系统开发环境与传统的PC开发环境相比,前者较为复杂.当前国内外尚无此类集成开发环境(IDE),本文以ARM S3C2440作为目标机,Linux 2.4以上版本作为嵌入式操作系统,快速构建嵌入式系统开发环境.最后,以一个LED字符设备驱动程序为例,对所构建的开发平台进行了测试.

  15. 基于ARM9的液晶驱动设计与μC/GUI移植研究%LCD driver design and transplant of μC/GUI based on ARM9

    Institute of Scientific and Technical Information of China (English)

    李彬; 纪常伟

    2011-01-01

    In process of embedded systems development, graphical user interface (GUI) is an important way for people to interact with the computer. As an important device for GUI, LCD was widely used in intelligent instruments and high - end embedded devices. This article describes the LCD controller in S3C2440 based on ARM920T core, interface circuit of LCD and its corresponding driver development. On this basis, μC/GUI which is a very excellent package of graphical user interface was transplanted in this system. The satisfactory result is attained on LCD screen by running examples of μC/GUI. The interface circuit and driver design for LCD and transplant of μC/GUI are proved reasonable and stable.%在嵌入式系统开发设计中,图形用户界面(GUI)是人与计算机进行交互的重要方式,液晶屏作为GUI的重要设备,在智能仪器仪表与高端嵌入式设备中得到广泛运用.文中介绍了基于ARM920T内核的芯片S3C2440内部LCD控制器以及LCD接口电路设计和相应驱动程序开发.并在此基础上移植了一种非常优秀的图形用户接口软件包μC/GUI.经过测试与μC/GUI实例运行,在液晶屏幕上得到了满意的显示效果,证明了液晶显示部分硬件接口、驱动设计以及μC/GUI移植的合理性与稳定性.

  16. SOCS1 and Regulation of Regulatory T Cells Plasticity

    Directory of Open Access Journals (Sweden)

    Reiko Takahashi

    2014-01-01

    Full Text Available Several reports have suggested that natural regulatory T cells (Tregs lose Forkhead box P3 (Foxp3 expression and suppression activity under certain inflammatory conditions. Treg plasticity has been studied because it may be associated with the pathogenesis of autoimmunity. Some studies showed that a minor uncommitted Foxp3+ T cell population, which lacks hypomethylation at Treg-specific demethylation regions (TSDRs, may convert to effector/helper T cells. Suppressor of cytokine signaling 1 (SOCS1, a negative regulator of cytokine signaling, has been reported to play an important role in Treg cell integrity and function by protecting the cells from excessive inflammatory cytokines. In this review, we discuss Treg plasticity and maintenance of suppression functions in both physiological and pathological settings. In addition, we discuss molecular mechanisms of maintaining Treg plasticity by SOCS1 and other molecules. Such information will be useful for therapy of autoimmune diseases and reinforcement of antitumor immunity.

  17. Fractal Characteristics of Gravity Landform and Its SOC Mechanism

    Institute of Scientific and Technical Information of China (English)

    YAO Lingkan; QI Ying

    2007-01-01

    From the principle of self-organized criticality (SOC), this work presents our current understanding of the relationship between the morphology and the dynamics of the evolution of landforms. First, we validate the assumption: Erosional slopes may be treated as SOC systems. Thus Sand-pile models will reflect the universal process of energy dissipation within the slope accumulation under the self-organizing actions. And the scale and frequency of deposit landforms will be related by Fractal structure. Then, by analyzing the field data, such as landslides, rockfalls and debris flow fans, hi three typical areas, the power law for the magnitude-frequency seems very robust. Furthermore, some problems in application are discussed.

  18. System on a Chip (SoC) Overview

    Science.gov (United States)

    LaBel, Kenneth A.

    2010-01-01

    System-on-a-chip or system on chip (SoC or SOC) refers to integrating all components of a computer or other electronic system into a single integrated circuit (chip). It may contain digital, analog, mixed-signal, and often radio-frequency functions all on a single chip substrate. Complexity drives it all: Radiation tolerance and testability are challenges for fault isolation, propagation, and validation. Bigger single silicon die than flown before and technology is scaling below 90nm (new qual methods). Packages have changed and are bigger and more difficult to inspect, test, and understand. Add in embedded passives. Material interfaces are more complex (underfills, processing). New rules for board layouts. Mechanical and thermal designs, etc.

  19. Unequal-Arms Michelson Interferometers

    Science.gov (United States)

    Tinto, Massimo; Armstrong, J. W.

    2000-01-01

    Michelson interferometers allow phase measurements many orders of magnitude below the phase stability of the laser light injected into their two almost equal-length arms. If, however, the two arms are unequal, the laser fluctuations can not be removed by simply recombining the two beams. This is because the laser jitters experience different time delays in the two arms, and therefore can not cancel at the photo detector. We present here a method for achieving exact laser noise cancellation, even in an unequal-arm interferometer. The method presented in this paper requires a separate readout of the relative phase in each arm, made by interfering the returning beam in each arm with a fraction of the outgoing beam. By linearly combining the two data sets with themselves, after they have been properly time shifted, we show that it is possible to construct a new data set that is free of laser fluctuations. An application of this technique to future planned space-based laser interferometer detector3 of gravitational radiation is discussed.

  20. 基于ARM的智能小区远程视频监控系统%Intelligent community based on ARM remote video monitoring system

    Institute of Scientific and Technical Information of China (English)

    代治国; 李兴霞

    2013-01-01

    The system is based on the ARM 11 processor as the core, through the 3G wireless transmission, to achieve intelligent terminal mobile phone remote monitoring. At the same time, through the internal network transmission to the monitoring center, so as to realize remote monitoring intelligent community, fast real-time monitoring purposes.%本系统基于ARM11处理器为核心,通过3G无线传输,实现智能终端手机的远程监控.同时,通过内部网络传输到监控中心,从而实现小区远程监控智能化、快速化的实时监控目的.

  1. Accounting for uncertainty in the historical response rate of the standard treatment in single-arm two-stage designs based on Bayesian power functions.

    Science.gov (United States)

    Matano, Francesca; Sambucini, Valeria

    2016-11-01

    In phase II single-arm studies, the response rate of the experimental treatment is typically compared with a fixed target value that should ideally represent the true response rate for the standard of care therapy. Generally, this target value is estimated through previous data, but the inherent variability in the historical response rate is not taken into account. In this paper, we present a Bayesian procedure to construct single-arm two-stage designs that allows to incorporate uncertainty in the response rate of the standard treatment. In both stages, the sample size determination criterion is based on the concepts of conditional and predictive Bayesian power functions. Different kinds of prior distributions, which play different roles in the designs, are introduced, and some guidelines for their elicitation are described. Finally, some numerical results about the performance of the designs are provided and a real data example is illustrated. Copyright © 2016 John Wiley & Sons, Ltd.

  2. 基于ARM的不同场合指纹细节点提取%Different occasions of fingerprint minutiae extraction based on ARM

    Institute of Scientific and Technical Information of China (English)

    刘辉

    2012-01-01

    According to the different quality images, we put forward both the improved 8-neighborhood feature extraction algorithm and SUSAN fingerprint feature extraction algorithm based on ARM. The two algorithm is compared in MATLAB, and the application features are summarizes. Finally the two algorithms are verified in the Arm platform.%基于ARM处理平台,针对不同质量的图像提出改进的8邻域特征提取算法和SUSAN的指纹特征提取算法,在MATLAB下对比了这两种算法的优缺点,总结了其应用的场合,并且在ARM主建平台上验证了这两种算法的快速性和准确性。

  3. An embedded real-time red peach detection system based on an OV7670 camera, ARM cortex-M4 processor and 3D look-up tables.

    Science.gov (United States)

    Teixidó, Mercè; Font, Davinia; Pallejà, Tomàs; Tresanchez, Marcel; Nogués, Miquel; Palacín, Jordi

    2012-10-22

    This work proposes the development of an embedded real-time fruit detection system for future automatic fruit harvesting. The proposed embedded system is based on an ARM Cortex-M4 (STM32F407VGT6) processor and an Omnivision OV7670 color camera. The future goal of this embedded vision system will be to control a robotized arm to automatically select and pick some fruit directly from the tree. The complete embedded system has been designed to be placed directly in the gripper tool of the future robotized harvesting arm. The embedded system will be able to perform real-time fruit detection and tracking by using a three-dimensional look-up-table (LUT) defined in the RGB color space and optimized for fruit picking. Additionally, two different methodologies for creating optimized 3D LUTs based on existing linear color models and fruit histograms were implemented in this work and compared for the case of red peaches. The resulting system is able to acquire general and zoomed orchard images and to update the relative tracking information of a red peach in the tree ten times per second.

  4. Wrapper/TAM Co-Optimization and constrained Test Scheduling for SOCs Using Rectangle Bin Packing

    CERN Document Server

    Babu, Hafiz Md Hasan; Karim, Muhammad Rezaul; Mahmud, Abdullah Al; Islam, Md Saiful

    2010-01-01

    This paper describes an integrated framework for SOC test automation. This framework is based on a new approach for Wrapper/TAM co-optimization based on rectangle packing considering the diagonal length of the rectangles to emphasize on both TAM widths required by a core and its corresponding testing time .In this paper, an efficient algorithm has been proposed to construct wrappers that reduce testing time for cores. Rectangle packing has been used to develop an integrated scheduling algorithm that incorporates power constraints in the test schedule. The test power consumption is important to consider since exceeding the system's power limit might damage the system.

  5. SOCS-1 deficiency does not prevent diet-induced insulin resistance

    DEFF Research Database (Denmark)

    Emanuelli, Brice; Macotela, Yazmin; Boucher, Jérémie

    2008-01-01

    Obesity is associated with inflammation and increased expression of suppressor of cytokine signaling (SOCS) proteins, which inhibit cytokine and insulin signaling. Thus, reducing SOCS expression could prevent the development of obesity-induced insulin resistance. Using SOCS-1 knockout mice, we...... investigated the contribution of SOCS-1 in the development of insulin resistance induced by a high-fat diet (HFD). SOCS-1 knockout mice on HFD gained 70% more weight, displayed a 2.3-fold increase in epididymal fat pads mass and increased hepatic lipid content. This was accompanied by increased mRNA expression...... of leptin and the macrophage marker CD68 in white adipose tissue and of SREBP1c and FAS in liver. HFD also induced hyperglycemia in SOCS-1 deficient mice with impairment of glucose and insulin tolerance tests. Thus, despite the role of SOCS proteins in obesity-related insulin resistance, SOCS-1 deficiency...

  6. Study on the expression of SOCS-1 SOCS-3 in liver and spleen of mice induced by acute organophosphorus pesticide poisoning( AOPP)%SOCS-1 SOCS-3在有机磷中毒鼠肝脾中表达的研究

    Institute of Scientific and Technical Information of China (English)

    欧阳艳红; 李松玲; 宋维; 赵宁; 马中富

    2009-01-01

    S-3水平均升高, 与对照组比较差异有统计学意义(P<0.05).统计分析显示, 肝脏中SOCS-1和SOCS-3 mRNA明显正相关(r=0.922,P<0.01) ,脾脏中SOCS-1和SOCS-3 mRNA明显正相关(r=0.957,P<0.01).结论 AOPP可诱导SOCS-1、SOCS-3在肝脾中表达,不同时间点AOPP中毒小鼠肝脏、脾脏中SOCS-1、SOCS-3 mRNA表达升高趋势一致.

  7. Brain-Computer Interface-based robotic end effector system for wrist and hand rehabilitation: results of a three-armed randomized controlled trial for chronic stroke

    Directory of Open Access Journals (Sweden)

    Kai Keng eAng

    2014-07-01

    Full Text Available The objective of this study was to investigate the efficacy of an Electroencephalography (EEG-based Motor Imagery (MI Brain-Computer Interface (BCI coupled with a Haptic Knob (HK robot for arm rehabilitation in stroke patients. In this three-arm, single-blind, randomized controlled trial; 21 chronic hemiplegic stroke patients (Fugl-Meyer Motor Assessment (FMMA score 10-50, recruited after pre-screening for MI BCI ability, were randomly allocated to BCI-HK, HK or Standard Arm Therapy (SAT groups. All groups received 18 sessions of intervention over 6 weeks, 3 sessions per week, 90 minutes per session. The BCI-HK group received 1 hour of BCI coupled with HK intervention, and the HK group received 1 hour of HK intervention per session. Both BCI-HK and HK groups received 120 trials of robot-assisted hand grasping and knob manipulation followed by 30 minutes of therapist-assisted arm mobilization. The SAT group received 1.5 hours of therapist-assisted arm mobilization and forearm pronation-supination movements incorporating wrist control and grasp-release functions. In all, 14 males, 7 females, mean age 54.2 years, mean stroke duration 385.1 days, with baseline FMMA score 27.0 were recruited. The primary outcome measure was upper-extremity FMMA scores measured mid-intervention at week 3, end-intervention at week 6, and follow-up at weeks 12 and 24. Seven, 8 and 7 subjects underwent BCI-HK, HK and SAT interventions respectively. FMMA score improved in all groups, but no intergroup differences were found at any time points. Significantly larger motor gains were observed in the BCI-HK group compared to the SAT group at weeks 3, 12 and 24, but motor gains in the HK group did not differ from the SAT group at any time point. In conclusion, BCI-HK is effective, safe, and may have the potential for enhancing motor recovery in chronic stroke when combined with therapist-assisted arm mobilization.

  8. Brain-computer interface-based robotic end effector system for wrist and hand rehabilitation: results of a three-armed randomized controlled trial for chronic stroke.

    Science.gov (United States)

    Ang, Kai Keng; Guan, Cuntai; Phua, Kok Soon; Wang, Chuanchu; Zhou, Longjiang; Tang, Ka Yin; Ephraim Joseph, Gopal J; Kuah, Christopher Wee Keong; Chua, Karen Sui Geok

    2014-01-01

    The objective of this study was to investigate the efficacy of an Electroencephalography (EEG)-based Motor Imagery (MI) Brain-Computer Interface (BCI) coupled with a Haptic Knob (HK) robot for arm rehabilitation in stroke patients. In this three-arm, single-blind, randomized controlled trial; 21 chronic hemiplegic stroke patients (Fugl-Meyer Motor Assessment (FMMA) score 10-50), recruited after pre-screening for MI BCI ability, were randomly allocated to BCI-HK, HK or Standard Arm Therapy (SAT) groups. All groups received 18 sessions of intervention over 6 weeks, 3 sessions per week, 90 min per session. The BCI-HK group received 1 h of BCI coupled with HK intervention, and the HK group received 1 h of HK intervention per session. Both BCI-HK and HK groups received 120 trials of robot-assisted hand grasping and knob manipulation followed by 30 min of therapist-assisted arm mobilization. The SAT group received 1.5 h of therapist-assisted arm mobilization and forearm pronation-supination movements incorporating wrist control and grasp-release functions. In all, 14 males, 7 females, mean age 54.2 years, mean stroke duration 385.1 days, with baseline FMMA score 27.0 were recruited. The primary outcome measure was upper extremity FMMA scores measured mid-intervention at week 3, end-intervention at week 6, and follow-up at weeks 12 and 24. Seven, 8 and 7 subjects underwent BCI-HK, HK and SAT interventions respectively. FMMA score improved in all groups, but no intergroup differences were found at any time points. Significantly larger motor gains were observed in the BCI-HK group compared to the SAT group at weeks 3, 12, and 24, but motor gains in the HK group did not differ from the SAT group at any time point. In conclusion, BCI-HK is effective, safe, and may have the potential for enhancing motor recovery in chronic stroke when combined with therapist-assisted arm mobilization.

  9. Improved orthopedic arm joint

    Science.gov (United States)

    Dane, D. H.

    1971-01-01

    Joint permits smooth and easy movement of disabled arm and is smaller, lighter and less expensive than previous models. Device is interchangeable and may be used on either arm at the shoulder or at the elbow.

  10. 基于ARM11的嵌入式Linux中nRF24L01驱动的实现%Design of nRF24L01 Driver Based on Embedded Linux System Under ARM11

    Institute of Scientific and Technical Information of China (English)

    张頔; 宋欣; 王宇航; 宋占伟

    2015-01-01

    In order to meet the demands of wireless data transmission, as well as to resolve the lack of nRF24L01 driver based on Linux, the driver of nRF24L01 is designed based on Linux.nRF24L01 exchanges data with external controller through SPI interface. Firstly,we drive nRF24L01 by using GPIO to simulate the SPI timing to achieve the SPI read and write operation. Secondly, the design of the system is provided, and the hardware interface and software process is disserted and carry on the detailed elaboration to the key functions. Lastly it achieves nRF24L01's wireless transmisson and test to verify the correctness of the driver based on the embedded microprocessor S3C6410.%针对无线音频数据传输的需要,以及基于ARM11处理器的nRF24L01驱动程序的缺乏,设计了在Linux系统下基于ARM11处理器的nRF24L01模块驱动程序。nRF24L01模块通过SPI接口和外部控制器进行数据交换。首先,结合nRF24L01模块的性能特点和Linux系统下字符设备驱动开发的流程,通过GPIO接口软件模拟SPI时序实现SPI读写操作,从而驱动nRF24L01模块。其次,给出了系统的整体方案,论述了系统硬件接口和软件流程,并对部分关键函数进行详细阐述。最后,在嵌入式处理器S3C6410平台上实现nRF24L01的无线收发,通过测试以验证驱动程序的正确性。

  11. A passivity based control methodology for flexible joint robots with application to a simplified shuttle RMS arm

    Science.gov (United States)

    Sicard, Pierre; Wen, John T.

    1991-01-01

    The main goal is to develop a general theory for the control of flexible robots, including flexible joint robots, flexible link robots, rigid bodies with flexible appendages, etc. As part of the validation, the theory is applied to the control law development for a test example which consists of a three-link arm modeled after the shoulder yaw joint of the space shuttle remote manipulator system (RMS). The performance of the closed loop control system is then compared with the performance of the existing RMS controller to demonstrate the effectiveness of the proposed approach. The theoretical foundation of this new approach to the control of flexible robots is presented and its efficacy is demonstrated through simulation results on the three-link test arm.

  12. Hard to heal pressure ulcers (stage III-IV): efficacy of injected activated macrophage suspension (AMS) as compared with standard of care (SOC) treatment controlled trial.

    Science.gov (United States)

    Zuloff-Shani, Adi; Adunsky, Abraham; Even-Zahav, Aviva; Semo, Haim; Orenstein, Arie; Tamir, Jeremy; Regev, Eli; Shinar, Eilat; Danon, David

    2010-01-01

    The objective of this study was to compare local injections of AMS with SOC treatments for stage III and IV pressure ulcers in elderly patients. It was designed as historically prospective 2-arms non-parallel open controlled trial, and conducted in a department of geriatric medicine and rehabilitation of a university affiliated tertiary hospital. We studied 100 consecutive elderly patients with a total of 216 stage III or IV pressure ulcers, 66 patients were assigned to the AMS group and had their wounds injected, while 38 patients were assigned to the SOC group. Primary outcome was rate of complete wound closure. Time to complete wound closure and 1-year mortality served as secondary outcomes. Statistical analyses were performed at both patient and wound levels. Percentage of completely closed wounds (wound level and patient level) were significantly better (pAMS, as well as in the subset of diabetic patients (pAMS proved significantly better for the subset of those with leg ulcers and with baseline wounds ≤15 cm(2), compared with SOC. There were no statistically significant differences with regard to time to complete closure or 1-year mortality rates in the two groups. It is concluded that there is a significant difference in favor of stage III and IV wound closure rates by AMS, as compared with SOC treatments.

  13. DMPD: Regulation of cytokine signaling by SOCS family molecules. [Dynamic Macrophage Pathway CSML Database

    Lifescience Database Archive (English)

    Full Text Available 14644140 Regulation of cytokine signaling by SOCS family molecules. Fujimoto M, Nak...a T. Trends Immunol. 2003 Dec;24(12):659-66. (.png) (.svg) (.html) (.csml) Show Regulation of cytokine signaling by SOCS family... molecules. PubmedID 14644140 Title Regulation of cytokine signaling by SOCS family molec

  14. Exploring the Effects of International Traffic in Arms Regulations Restrictions on Innovation in the U.S. Space Industrial Base

    Science.gov (United States)

    2010-08-01

    States USML United States Munitions List   1   EXPLORING THE EFFECTS OF INTERNATIONAL TRAFFIC IN ARMS REGULATIONS RESTRICTIONS ON...The Department of Defense (DoD) captures and manages these items in the U.S. Munitions List ( USML ). Furthermore, two categories in the USML ...communications technologies and the rest of the space items on the USML remained under its jurisdiction” (Space Foundation 2008). By taking such an

  15. Effect of dendrite arm spacing and the γ’ phase size on stress rupture properties of Ni3Al-base single crystal superalloy IC6SX

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The effect of dendrite arm spacing and the size of γ’ phase on stress rupture properties of as-cast Ni3Al-based single crystal superalloy IC6SX was studied.It has been found that the stress rupture properties were affected by dendrite arm spacing and the size of γ’ phase significantly,i.e.,the stress rupture lives of as-cast specimens under the test condition of 1100°C/120 MPa were significantly increased from about 10 h to 31 h with decreasing dendrite arm spacing and the size of γ’ phase from 3.0 μm and 1.6 μm to 1.3 μm and 0.8 μm,respectively.The creep cracks generated easily in the brittle Y-NiMo phase.Then the cracks gradually mergered and grew up during creep,and finally led to specimens fracture.The orientated coarsening of γ’ phase has been found in the stress ruptured specimens,due to the elements diffusion.However,the γ’ phase did not form the integrated structure during the short periods of 10-31 h as the creep tests lasted.

  16. multi-protocol dimming System Based on ARM Technology%基于ARM技术的多协议调光系统

    Institute of Scientific and Technical Information of China (English)

    李南安; 梁芳芳

    2012-01-01

    In order to meet the dimming system networked and multi-protocol trends,and some suggestions of multi-protocol dimming System based on the ARM technology were put forward.Used the embedded Linux operating system and industrial ARM9 development platform,through designing the realized system,the equipment demand of dimming market was realized effectively,it enriched the corporate products and the product adaptability was enhanced.%为了满足调光系统的网络化和多协议趋势,提出了一种基于ARM技术的多协议调光系统。采用嵌入式linux操作系统和工业化的工业级ARM9开发平台。所设计实现的系统有效的实现了调光市场的设备需求,丰富了公司的产品和增强了产品适应性。

  17. Design of Scraper Conveyor Condition Monitoring System based on ARM%基于ARM的刮板输送机状态监测系统的设计

    Institute of Scientific and Technical Information of China (English)

    于平; 刘曦永; 小云

    2015-01-01

    针对刮板输送机传动系统的故障率较高,设计了基于ARM的刮板输送机状态的监测系统,其处理器采用的是英创生产的ARM9 EM9161,并结合数据采集装置和无线信号传输模块,实现了对电动机和减速器相关重要参数的监测报警。文中讲述了系统的硬件构成, WinCE的软件环境等。该设计将应用于煤矿状态监测领域,具有很好的应用价值。%The paper is designed the state of scraper conveyor monitoring system based on ARM for the high failure rate of scraper conveyor drive system. The system uses ARM9 EM9161 development board produced by YingChuang company, combines with data acquisition devices and wireless signal transmission module, realizes the important parameters related to the motor and gear unit to monitor alarming. The paper describes the configuration of the system's hardware, software envi-ronment of WINCE and so on. The design will apply to the field of early-warning and monitoring in mine, and have very good value.

  18. Circuitry Protector of Microcomputer Based on ARM and DSP%基于ARM和DSP的微机线路保护装置

    Institute of Scientific and Technical Information of China (English)

    张小伟

    2012-01-01

    This paper utilizes the effective and rapid digital signal processing capability of digital signal processor(DSP) and the powerful Ethernet network communication function of embed advanced reduced instruction set chip machine(ARM) processor,adopts the dual central processing unit(CPU) hardware structure combined DSP with ARM9,which uses the dual-interface random access memory(RAM) to perform the data exchange between them.The software design is based on embed Linux operating system,replants Bootloader and kernel,constructs the root file system of Ramdisk,and replants the application program.%在微机线路保护中,利用数字信号处理器(DSP)高效快速的数字信号处理能力和嵌入式先进的精简指令集芯片机器(ARM)处理器强大的以太网通信功能,采用DSP+ARM9的双中央处理器(CPU)的硬件结构,两者之间采用双口随机存储器(RAM)进行数据交换。软件设计基于嵌入式Linux操作系统,移植了Bootloader、内核,构建了Ramdisk的根文件系统,并移植了应用程序。

  19. Balance Maintenance in High-Speed Motion of Humanoid Robot Arm-Based on the 6D Constraints of Momentum Change Rate

    Directory of Open Access Journals (Sweden)

    Da-song Zhang

    2014-01-01

    Full Text Available Based on the 6D constraints of momentum change rate (CMCR, this paper puts forward a real-time and full balance maintenance method for the humanoid robot during high-speed movement of its 7-DOF arm. First, the total momentum formula for the robot’s two arms is given and the momentum change rate is defined by the time derivative of the total momentum. The author also illustrates the idea of full balance maintenance and analyzes the physical meaning of 6D CMCR and its fundamental relation to full balance maintenance. Moreover, discretization and optimization solution of CMCR has been provided with the motion constraint of the auxiliary arm’s joint, and the solving algorithm is optimized. The simulation results have shown the validity and generality of the proposed method on the full balance maintenance in the 6 DOFs of the robot body under 6D CMCR. This method ensures 6D dynamics balance performance and increases abundant ZMP stability margin. The resulting motion of the auxiliary arm has large abundance in joint space, and the angular velocity and the angular acceleration of these joints lie within the predefined limits. The proposed algorithm also has good real-time performance.

  20. Role of intraoperative 3D C-arm-based navigation in percutaneous excision of osteoid osteoma of long bones in children.

    Science.gov (United States)

    Rajasekaran, Shanmuganathan; Karthik, Karuppaiah; Chandra, Vattipalli Ravi; Rajkumar, Natesan; Dheenadhayalan, Jayaramaraju

    2010-03-01

    Failures of treatment of osteoid osteoma (OO) are related to errors in exact localization and incomplete excision of the nidus. We report the successful percutaneous excision of OO in five patients (upper end of femur - 3, tibia - 2). All patients had a minimally invasive reflective array fixed to the same bone followed by registration of anatomy by Iso-C three-dimensional (3D) C-arm. A tool navigator was used to plan the keyhole incision then a sleeve was introduced which allowed the usage of burr and curette to remove the tumor. After excision, the 3D C-arm was again used intraoperatively to confirm the complete eradication of the nidus. Adequate material for histology was obtained in four patients that confirmed the diagnosis of OO. In one child postexcision scans were successful in identifying incomplete removal requiring further excision of the nidus. All patients achieved excellent pain relief and were asymptomatic at an average follow-up of 3.2 years. 3D C-arm-based navigation offers the advantage of excellent localization, percutaneous excision, and intraoperative confirmation of adequate excision.

  1. The Development of a General Purpose ARM-based Processing Unit for the ATLAS TileCal sROD

    CERN Document Server

    Cox, Mitchell Arij; The ATLAS collaboration; Mellado Garcia, Bruce Rafael

    2015-01-01

    The Large Hadron Collider at CERN generates enormous amounts of raw data which present a serious computing challenge. After Phase-II upgrades in 2022, the data output from the ATLAS Tile Calorimeter will increase by 200 times to 41 Tb/s! ARM processors are common in mobile devices due to their low cost, low energy consumption and high performance. It is proposed that a cost-effective, high data throughput Processing Unit (PU) can be developed by using several consumer ARM processors in a cluster configuration to allow aggregated processing performance and data throughput while maintaining minimal software design difficulty for the end-user. This PU could be used for a variety of high-level functions on the high-throughput raw data such as spectral analysis and histograms to detect possible issues in the detector at a low level. High-throughput I/O interfaces are not typical in consumer ARM System on Chips but high data throughput capabilities are feasible via the novel use of PCI-Express as the I/O interface ...

  2. The Development of a General Purpose ARM-based Processing Unit for the TileCal sROD

    CERN Multimedia

    Cox, Mitchell A

    2014-01-01

    The Large Hadron Collider at CERN generates enormous amounts of raw data which present a serious computing challenge. After planned upgrades in 2022, the data output from the ATLAS Tile Calorimeter will increase by 200 times to 41 Tb/s! ARM processors are common in mobile devices due to their low cost, low energy consumption and high performance. It is proposed that a cost-effective, high data throughput Processing Unit (PU) can be developed by using several consumer ARM processors in a cluster configuration to allow aggregated processing performance and data throughput while maintaining minimal software design difficulty for the end-user. This PU could be used for a variety of high-level functions on the high-throughput raw data such as spectral analysis and histograms to detect possible issues in the detector at a low level. High-throughput I/O interfaces are not typical in consumer ARM System on Chips but high data throughput capabilities are feasible via the novel use of PCI-Express as the I/O interface t...

  3. Optimality of Upper-Arm Reaching Trajectories Based on the Expected Value of the Metabolic Energy Cost.

    Science.gov (United States)

    Taniai, Yoshiaki; Nishii, Jun

    2015-08-01

    When we move our body to perform a movement task, our central nervous system selects a movement trajectory from an infinite number of possible trajectories under constraints that have been acquired through evolution and learning. Minimization of the energy cost has been suggested as a potential candidate for a constraint determining locomotor parameters, such as stride frequency and stride length; however, other constraints have been proposed for a human upper-arm reaching task. In this study, we examined whether the minimum metabolic energy cost model can also explain the characteristics of the upper-arm reaching trajectories. Our results show that the optimal trajectory that minimizes the expected value of energy cost under the effect of signal-dependent noise on motor commands expresses not only the characteristics of reaching movements of typical speed but also those of slower movements. These results suggest that minimization of the energy cost would be a basic constraint not only in locomotion but also in upper-arm reaching.

  4. Arm Lift (Brachioplasty)

    Science.gov (United States)

    ... sagging. An arm lift might also boost your body image. As you get older, the skin on your upper arms changes — sagging and becoming loose. Significant weight loss also can cause the undersides of your upper arms to droop. While exercise can strengthen and improve muscle tone in the ...

  5. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel......A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...

  6. A physical simulation study of the effect of thermal variations on the secondary dendrite arm spacing in a Ni-based superalloy

    Science.gov (United States)

    Rahimian, Mehdi; Milenkovic, Srdjan; Sabirov, Ilchat

    2014-02-01

    The effect of thermal variations on the secondary dendrite arm spacing (SDAS) in a MAR-M247 Ni-based superalloy has been studied by a novel method based on a physical simulation of melting/solidification experiments with a constant cooling rate and variable temperature gradient. The method proved to be effective as it yielded a spread of microstructures corresponding to a range of well-controlled solidification rates in a single melting/solidification experiment. In addition, it has been demonstrated that SDAS is better related to the solidification rate than to the cooling rate in cases when significant variations of thermal parameters during the solidification process occur.

  7. Design of Dynamic Electrocardiogram Based on ARM Cortex-M3%基于ARM Cortex-M3的动态心电图机设计

    Institute of Scientific and Technical Information of China (English)

    谢建华; 刘海波; 刘瑞芳

    2012-01-01

    In order to enrich the product categories and function of the dynamic electrocardiogram,a new type of dynamic electrocardiogram product based on ARM (Advanced RISC Machines) Cortex-M3 is developed. The system hardware consists a processor minimum system,bioelectricity amplification module, storage module,LCD(Liquid Crstal Display) and touch screen module,high speed USB interface and the power module. For the system software, the platform was build based on CooCox CoOS embedded realtime operating system, the file system and USB middleware. The man-machine interface is realized by transplanting uC/GUI. The experiment results showed that the system could be used to control ECG signal collection,great capacity data storage and high-speed upload. The graphical user interface and real time waveform display are the innovative points.%针对目前动态心电图机产品种类和功能单一的现状,研制了基于ARM(Advanced RISC Machines) Cortex-M3的新型动态心电图机.硬件主要由处理器最小系统、生物电放大模块、存储模块、LCD (Liquid Cgstal Display)和触摸屏模块、高速USB接口和电源模块构成.软件开发基于CooCox CoOS嵌入式实时操作系统,同时使用了文件系统和USB等中间件.移植uC/GUI实现人机接口设计.测试结果表明,该系统不但实现了心电信号采集、大容量数据存储和高速上传的功能,而且创新性地增加了图形用户界面和实时波形显示功能.

  8. Behavior data of battery and battery pack SOC estimation under different working conditions.

    Science.gov (United States)

    Zhang, Xu; Wang, Yujie; Yang, Duo; Chen, Zonghai

    2016-12-01

    This article provides the dataset of operating conditions of battery behavior. The constant current condition and the dynamic stress test (DST) condition were carried out to analyze the battery discharging and charging features. The datasets were achieved at room temperature, in April, 2016. The shared data contributes to clarify the battery pack state-of-charge (SOC) and the battery inconsistency, which is also shown in the article of "An on-line estimation of battery pack parameters and state-of-charge using dual filters based on pack model" (X. Zhang, Y. Wang, D. Yang, et al., 2016) [1].

  9. 基于ARM11的机动车柔性限行管理系统设计%Flexible Vehicle Restriction Management System Based on ARM11

    Institute of Scientific and Technical Information of China (English)

    张凯; 孙跃; 周侃; 江慧

    2014-01-01

    为解决城市道路交通拥挤问题,设计了一套基于ARM11的机动车柔性限行管理系统。系统采用S3C6410微处理器为核心,利用GPRS无线通信技术将GPS定位信息传输到交管信息处理中心服务器。交管中心分路段设定限行比例,统计机动车该月在限行路段中出行天数,并将机动车出行信息反馈给车主,对超出限行比例的机动车收取拥挤费,从而实现机动车柔性限行管理。实验证明:GPRS发送GPS定位信息准确,车辆出行信息反馈及时,系统设计达到了预期的功能和要求。%In order to solve the problem of urban road congestion, a flexible ARM11-based vehicle limit line management system was designed. System uses S3C6410 microprocessor core, applies the GPRS wireless communication technology to transmit information to the GPS positioning information processing traffic control center server. The traffic control center to set vehicle restriction ratio by sections, and count vehicles travel days in this month at the limit line sections,feed back to the vehicle's travel information to the car owner,charge the congestion fee for the proportion of vehicles exceeding the vehicle restriction ratio, thus we could achieve a flexible vehicle restriction management. Experiments show that GPRS to send GPS location information is accurate,timely feedback vehicle travel,system design to achieve the desired functionality and requirements.

  10. ARM Cortex M0的油田采输物联网监控系统设计%Design of IoT Monitoring System for Oil Extraction and Transportation Based on ARM Cortex-M0

    Institute of Scientific and Technical Information of China (English)

    于玉珠; 殷春莉

    2014-01-01

    为了提升油田生产的自动化程度,保障安全,降低运行成本,扩大对环境恶劣和偏远地区的自动化覆盖范围,设计一种油田采输物联网监控系统。该系统以基于 ARM Cortex M0的 LPC11C14FBD48为主控芯片,M35为 GPRS 通信模块,用 C++语言开发内核软件和远程集中监控中心软件。可远程对油田采输现场的数据进行采集和系统控制,同时与云计算服务中心实现数据交互,为大数据处理提供基础。该系统实现了油田采输无人值守,覆盖偏远区域,降低了运行成本,提升了油田生产的安全性、可靠性和高效性,使油田生产综合效益明显提高。%In order to raise the automation degree and security in oil field production,reduce the running cost and improve the automated range of poor environment and remote areas,a kind of IoT monitoring control system for oil production is designed.The system takes LPC1 1C14FBD48 based on ARM Cortex-M0 as main control chip and M35 as GPRS communication module.C++ is used to develop kernel software and the software of remote centralized monitoring control center.Remote data acquisition and system control of oil acqui-sition areas are realized,and data interactions with the cloud computing service center are completed so as to provide basic data for big data processing.The system can be applied in poor environment and remote areas.It not only saves the operation cost,but also improves safety,reliability and efficiency,so that it increases obviously comprehensive benefits of oil field production.

  11. 基于ARM9和Linux的微波实验远程视频监控系统%Remote Microwave Experiment Video Surveillance System Based ARM9 and Linux

    Institute of Scientific and Technical Information of China (English)

    李烨; 沈洪锐; 张晶晶

    2012-01-01

    传统的微波测量系统由于受到现场测试条件以及仪器笨重的限制,学生只能进行本地实验,受时间地点的约束,同时也不利于实验室资源的利用.本文提出基于嵌入式Linux的远程视频监控实验系统,且有很强的实时性,交互性,结合HTML+JavaScript+Java+CGI四种编程语言的嵌入式网页设计,能够很好解决以上问题.%Conventional microwave measurement systems are limited by on-site testing conditions and heavy equipment, hence students have to perform experiment locally, which is not optimized for lab resources due to the time and place constraints. This paper builds an ARM9 and Linux-based microwave experiment surveillance system to solve the above problems by embedded websites design combining HTML+JavaScript+Java+CGI, which provides strong real-time and interactive.

  12. Low Noise Readout Circuit for Biosensor SoC

    Institute of Scientific and Technical Information of China (English)

    PAN Yin-song; KONG Mou-fu; LI Xiang-quan; WANG Li

    2008-01-01

    Presented is a low noise interface circuit that is tuned to the needs of self-assembly monolayers biosensor SoC. The correlated double sampling(CDS) unit of the readout circuit can reduce 1/f noise, KTC noise and fixed noise of micro arrays effectively. The circuit is simulated in a 0.6 μm/level 7 standard CMOS process, and the simulated results show the output voltage has a good linearity with the transducing current of the micro arrays. This is a novel circuit including four amplifiers sharing a common half-circuit and the noise reducing CDS unit. It could be widely used for micro array biosensors.

  13. CyARM: Haptic Sensing Device for Spatial Localization on Basis of Exploration by Arms

    Directory of Open Access Journals (Sweden)

    Junichi Akita

    2009-01-01

    Full Text Available We introduce a new type of perception aid device based on user's exploration action, which is named as CyARM (acronym of “Cyber Arm”. The user holds this device in her/his arm, the extension of the arm is controlled by tension in wires, which are attached to her/his body according to the distance to the object. This user interface has unique characteristics that give users the illusion of an imaginary arm that extends to existing objects. The implementations of CyARM and our two experiments to investigate the efficiency and effectiveness of CyARM are described. The results show that we could confirm that CyARM can be used to recognize the presence of an object in front of the user and to measure the relative distance to the object.

  14. Research on Intelligent Energy Saving System based on ZigBee and ARM%基于ZigBee和ARM的智能节电系统研究

    Institute of Scientific and Technical Information of China (English)

    杜欣慧; 卢小茜; 白雪艳

    2012-01-01

    As for the disadvantages of traditional intelligent system,that is,the needs to be rewired whether it increases or decreases equipments, poor scalability and mobility of the system, high the cost of installation and maintenance, and lack of human-computer interaction,ZigBee and ARM were introduced into the intelligent power saving system. Based on CC2430-ZigBee and ARM chip microprocessor, intelligent power saving system was established. ARM human-computer interaction interface was designed,which was easy to operate and monitor. ZigBee protocol stack and each terminal module were compiled, debugged and bound, ZigBee networking test and the control of ARM were realized. System test shows that network was normal, data transmission was stable. ZigBee wireless communication system reduced wiring, increased system scalability and mobility. Operation-simple ARM interface realized human-machine interaction, and intelligent ization. The condition of electrical equipment, indoor temperature, security, real-time power, time-of-use electricity price, electricity ladder of alarm could also be remotely monitored.%针对传统智能系统增减设备都需要重新布线,系统的可扩展性和移动性比较差,安装和维护成本高,缺乏人机互动等问题,将ZigBee和ARM引入智能节电系统中.采用CC2430组建基于ZigBee的无线通信系统,选用ARM芯片为微处理器组建系统,并对其进行软件开发,设计出了易于操作和监控的ARM人机交互界面,对ZigBee协议栈和各个终端模块进行编译、调试和绑定,进行ZigBee组网测试和实现ARM控制.系统测试表明:组网正常,传输数据稳定,ZigBee无线通信系统能够减少布线,增加系统的可扩展性和移动性,操作简单的ARM界面能够实现人机互动,实现智能化.系统还可实现远程监控电气设备的使用情况、室内温度、安防、反映实时用电情况以及实施分时电价、阶梯电价的报警.

  15. Constitutive SOCS-3 expression protects T-cell lymphoma against growth inhibition by IFNalpha

    DEFF Research Database (Denmark)

    Brender, C; Lovato, P; Sommer, V H;

    2005-01-01

    Signal transducer and activator of transcription (Stat)3 is constitutively activated in cutaneous T-cell lymphoma (CTCL), where it protects tumour cells against apoptosis. The constitutive activation of Stat3 leads to a constitutive expression of suppressor of cytokine signalling (SOCS)-3....... In healthy cells, SOCS-3 is transiently expressed following cytokine stimulation and functions as a negative feedback inhibitor of the Stat3-activating kinases. Here, we attempt to resolve the apparent paradox of a simultaneous SOCS-3 expression and Stat3 activation in the same cells. We show that (i) SOCS-3...... expression in tumour cells is equal to or higher than in cytokine-stimulated nonmalignant T cells, (ii) SOCS-3 is not mutated in CTCL, (iii) overexpression of SOCS-3 blocks IFNalpha-mediated growth inhibition without affecting Stat3 activation, growth, and apoptosis, and (iv) inhibition of SOCS-3...

  16. Image-based compensation for involuntary motion in weight-bearing C-arm cone-beam CT scanning of knees

    Science.gov (United States)

    Unberath, Mathias; Choi, Jang-Hwan; Berger, Martin; Maier, Andreas; Fahrig, Rebecca

    2015-03-01

    We previously introduced four fiducial marker-based strategies to compensate for involuntary knee-joint motion during weight-bearing C-arm CT scanning of the lower body. 2D methods showed significant reduction of motion- related artifacts, but 3D methods worked best. However, previous methods led to increased examination times and patient discomfort caused by the marker attachment process. Moreover, sub-optimal marker placement may lead to decreased marker detectability and therefore unstable motion estimates. In order to reduce overall patient discomfort, we developed a new image-based 2D projection shifting method. A C-arm cone-beam CT system was used to acquire projection images of five healthy volunteers at various flexion angles. Projection matrices for the horizontal scanning trajectory were calibrated using the Siemens standard PDS-2 phantom. The initial reconstruction was forward projected using maximum-intensity projections (MIP), yielding an estimate of a static scan. This estimate was then used to obtain the 2D projection shifts via registration. For the scan with the most motion, the proposed method reproduced the marker-based results with a mean error of 2.90 mm +/- 1.43 mm (compared to a mean error of 4.10 mm +/- 3.03 mm in the uncorrected case). Bone contour surrounding modeling clay layer was improved. The proposed method is a first step towards automatic image-based, marker-free motion-compensation.

  17. A simple dose regimen of artesunate and amodiaquine based on arm span- or age range for childhood falciparum malaria: a preliminary evaluation.

    Science.gov (United States)

    Sowunmi, Akintunde; Akinrinola, Ibukun A; Gbotosho, Grace O; Okuboyejo, Titilope M; Happi, Christian T

    2012-08-01

    A dose regimen of artesunate and amodiaquine based on arm span- or age range (DRAAAS), derived from a study of 1674 children, was compared with standard dose regimen of the same drugs calculated according to body weight (SDRAA) in 68 malarious children. Children on DRAAAS received 0.8-1.0 of artesunate/kg and 0.9-1.2 times amodiaquine/kg compared with those receiving SDRAA. Parasite and fever clearance and fall in hematocrit in the first 3 days were similar; both regimens were well tolerated. DRAAAS is simple and is efficacious.

  18. The SOCS2 ubiquitin ligase complex regulates growth hormone receptor levels.

    Directory of Open Access Journals (Sweden)

    Mattias Vesterlund

    Full Text Available Growth Hormone is essential for the regulation of growth and the homeostatic control of intermediary metabolism. GH actions are mediated by the Growth Hormone Receptor; a member of the cytokine receptor super family that signals chiefly through the JAK2/STAT5 pathway. Target tissue responsiveness to GH is under regulatory control to avoid excessive and off-target effects upon GHR activation. The suppressor of cytokine signalling 2 (SOCS is a key regulator of GHR sensitivity. This is clearly shown in mice where the SOCS2 gene has been inactivated, which show 30-40% increase in body length, a phenotype that is dependent on endogenous GH secretion. SOCS2 is a GH-stimulated, STAT5b-regulated gene that acts in a negative feedback loop to downregulate GHR signalling. Since the biochemical basis for these actions is poorly understood, we studied the molecular function of SOCS2. We demonstrated that SOCS2 is part of a multimeric complex with intrinsic ubiquitin ligase activity. Mutational analysis shows that the interaction with Elongin B/C controls SOCS2 protein turnover and affects its molecular activity. Increased GHR levels were observed in livers from SOCS2⁻/⁻ mice and in the absence of SOCS2 in in vitro experiments. We showed that SOCS2 regulates cellular GHR levels through direct ubiquitination and in a proteasomally dependent manner. We also confirmed the importance of the SOCS-box for the proper function of SOCS2. Finally, we identified two phosphotyrosine residues in the GHR to be responsible for the interaction with SOCS2, but only Y487 to account for the effects of SOCS2. The demonstration that SOCS2 is an ubiquitin ligase for the GHR unveils the molecular basis for its physiological actions.

  19. Scanning ARM Cloud Radar Handbook

    Energy Technology Data Exchange (ETDEWEB)

    Widener, K; Bharadwaj, N; Johnson, K

    2012-06-18

    The scanning ARM cloud radar (SACR) is a polarimetric Doppler radar consisting of three different radar designs based on operating frequency. These are designated as follows: (1) X-band SACR (X-SACR); (2) Ka-band SACR (Ka-SACR); and (3) W-band SACR (W-SACR). There are two SACRs on a single pedestal at each site where SACRs are deployed. The selection of the operating frequencies at each deployed site is predominantly determined by atmospheric attenuation at the site. Because RF attenuation increases with atmospheric water vapor content, ARM's Tropical Western Pacific (TWP) sites use the X-/Ka-band frequency pair. The Southern Great Plains (SGP) and North Slope of Alaska (NSA) sites field the Ka-/W-band frequency pair. One ARM Mobile Facility (AMF1) has a Ka/W-SACR and the other (AMF2) has a X/Ka-SACR.

  20. Gaining Insights on the H2–Sorbent Interactions: Robust soc-MOF Platform as a Case Study

    KAUST Repository

    Cairns, Amy J.

    2016-09-18

    We report on the synthesis and gas adsorption properties (i.e., Ar and H2) of four robust 3-periodic metal–organic frameworks (MOFs) having the targeted soc topology. These cationic MOFs are isostructural to the parent indium-based MOF, In-soc-MOF-1a (for NO3–), previously reported by us, and likewise are constructed from the assembly of rigid μ3-oxygen-centered trinuclear metal carboxylate clusters, [M3O(O2C−)6], where M = In3+ or Fe3+. Each inorganic trinuclear molecular building block (MBB), generated in situ, is bridged by six 3,3′,5,5′-azobenzenetetracarboxylate (ABTC4–) ligands to give the extended (4,6)-connected MOF, soc-MOF. In our previous work, we confirmed that the parent soc-MOF, i.e., In-soc-MOF-1a, possesses unique structural characteristics (e.g., vacant In binding sites and narrow pores with higher localized charge density), which led to exceptional hydrogen (H2) storage capabilities. Therefore, charged MOFs with soc topology can be viewed collectively as an ideal prototypical platform to examine the impact of specific structural parameters on H2–MOF interactions via systematic gas adsorption studies. We infer that enhanced binding of molecular H2 is primarily governed by the presence and type of vacant metal centers (i.e., Fe was shown to exhibit stronger H2–MOF interactions at low H2 loading compared to the In analogues). These findings are evident from the associated isosteric heat of adsorption (Qst) at low loadings and inelastic neutron scattering (INS) experiments of the rotational transitions of sorbed H2, as well as, temperature-programmed desorption (TPD) studies (for a select compound). The importance of localized charge density is also highlighted, where the extra-framework nitrate anions in the Fe-soc-MOF-1a (for NO3–) facilitate enhanced binding affinities as compared to the chloride analogue.

  1. 类风湿性关节炎患者血清及关节积液SOCS-1、SOCS-3蛋白的含量检测及意义%The content and value of SOCS-1 and SOCS-3 proteins in serum and synovial fluid of patients with rheumatoid arthritis

    Institute of Scientific and Technical Information of China (English)

    林栋; 汪铁军; 钱一龙

    2012-01-01

    Objective To investigate the changes of the levels of serum and synovial fluid SOCS-1, SOCS-3 in patients with rheumatoid arthritis( RA ), and to explore the value of SOCS-1 and SOCS-3 in inflammatory reaction of rheumatoid arthritis. Methods 49 patients with rheumatoid arthritis were divided into active RA group( 26 cases ) and non- active RA group( 23 cases jaccording to disease activity index. The levels of serum and synovial fluid SOCS-1, SOCS-3 were detected by ELISA, while the 20 health)' control were compiled into the control group. Results The levels of serum SOCS-1 and SOCS-3 were significantly higher in RA group than those in control group( P < 0. 01 ), which were significantly higher in active RA group than those in non- active RA group( P < 0. 01, P < 0. 05 ). The levels of synovial fluid SOCS-1 and SOCS-3 were significantly higher in active RA group than those in non- active RA group( P <0. 05 ). The levels of serum SOCS-1 and SOCS-3 were positively correlated with the serum ESR,CRP,RF ( P <0. 01 ,P <0. 05 ). Conclusions SOCS-1 and SOCS-3 may play an important role in the pathological process of inflammatory response in rheumatoid arthritis, which ma)' be related to activity of rheumatoid arthritis.%目的 观察类风湿性关节炎(RA)患者血清及关节液SOCS-1、SOCS-3蛋白含量的变化,探讨其在炎症中的意义.方法 49例类风湿性关节炎患者根据疾病活动性分为活动期组(26例)及缓解期组(23例),采用ELISA法检测其血清及关节液SOCS-1、SOCS-3蛋白含量,并与20例健康体检者(对照组)进行比较.结果 与对照组比较,RA患者中活动期组与缓解期组血清SOCS-1、SOCS-3蛋白含量均明显升高(P<0.01),其中活动期组血清SOCS-1、SOCS-3含量表达较缓解组明显升高(P<0.01、P<0.05);活动期组患者关节积液SOCS-1、SOCS-3蛋白表达较缓解期组明显升高(P<0.05);活动期组患者血清SOCS-1、SOCS-3蛋白水平均与血清ESR、CRP、RF呈正相关(P<0.01、P<0

  2. Prediction of three-dimensional arm trajectories based on ECoG signals recorded from human sensorimotor cortex.

    Science.gov (United States)

    Nakanishi, Yasuhiko; Yanagisawa, Takufumi; Shin, Duk; Fukuma, Ryohei; Chen, Chao; Kambara, Hiroyuki; Yoshimura, Natsue; Hirata, Masayuki; Yoshimine, Toshiki; Koike, Yasuharu

    2013-01-01

    Brain-machine interface techniques have been applied in a number of studies to control neuromotor prostheses and for neurorehabilitation in the hopes of providing a means to restore lost motor function. Electrocorticography (ECoG) has seen recent use in this regard because it offers a higher spatiotemporal resolution than non-invasive EEG and is less invasive than intracortical microelectrodes. Although several studies have already succeeded in the inference of computer cursor trajectories and finger flexions using human ECoG signals, precise three-dimensional (3D) trajectory reconstruction for a human limb from ECoG has not yet been achieved. In this study, we predicted 3D arm trajectories in time series from ECoG signals in humans using a novel preprocessing method and a sparse linear regression. Average Pearson's correlation coefficients and normalized root-mean-square errors between predicted and actual trajectories were 0.44~0.73 and 0.18~0.42, respectively, confirming the feasibility of predicting 3D arm trajectories from ECoG. We foresee this method contributing to future advancements in neuroprosthesis and neurorehabilitation technology.

  3. Prediction of three-dimensional arm trajectories based on ECoG signals recorded from human sensorimotor cortex.

    Directory of Open Access Journals (Sweden)

    Yasuhiko Nakanishi

    Full Text Available Brain-machine interface techniques have been applied in a number of studies to control neuromotor prostheses and for neurorehabilitation in the hopes of providing a means to restore lost motor function. Electrocorticography (ECoG has seen recent use in this regard because it offers a higher spatiotemporal resolution than non-invasive EEG and is less invasive than intracortical microelectrodes. Although several studies have already succeeded in the inference of computer cursor trajectories and finger flexions using human ECoG signals, precise three-dimensional (3D trajectory reconstruction for a human limb from ECoG has not yet been achieved. In this study, we predicted 3D arm trajectories in time series from ECoG signals in humans using a novel preprocessing method and a sparse linear regression. Average Pearson's correlation coefficients and normalized root-mean-square errors between predicted and actual trajectories were 0.44~0.73 and 0.18~0.42, respectively, confirming the feasibility of predicting 3D arm trajectories from ECoG. We foresee this method contributing to future advancements in neuroprosthesis and neurorehabilitation technology.

  4. 基于ARM和WSNs的智能家居安防系统设计%Design of Smart Home Security System Based on ARM and WSNs

    Institute of Scientific and Technical Information of China (English)

    杨靖; 林益; 李捍东

    2012-01-01

    In accordance with the demands for home security and safeguard, the intelligent monitoring system based on ARM and WSNs is researched and developed. The detection and communication platform is established by the system with wireless sensor network as the foundation. The household central controller, detection nodes and actuation nodes are setup by adopting the embedded system based on ARM microprocessor and nRF9E5 wireless single chip computer. The home environment is detected through the sensors equipped in detection nodes; trie alarm information is transmitted to household central controller and actuation nodes. The system features good detection effects, and is expandable and flexible, it is an effective solution for implementing home security and safeguard.%针对家居安防系统的需求,设计研发了基于ARM和WSNs的智能家居安防监控系统.该系统以无线传感器网络为基础,构建探测和通信平台,采用以ARM9微处理器和nRF9E5无线单片机为核心的嵌入式系统构建家庭总控制器、探测节点和执行节点.探测节点利用配置好的传感器对家居环境进行监测,并通过无线通信方式将报警信息传送给家庭总控制器和执行节点.该系统具有探测效果好、可扩展性强和装设灵活的优点,是家居安防的有效解决方案.

  5. Effects of Action Observational Training Plus Brain-Computer Interface-Based Functional Electrical Stimulation on Paretic Arm Motor Recovery in Patient with Stroke: A Randomized Controlled Trial.

    Science.gov (United States)

    Kim, TaeHoon; Kim, SeongSik; Lee, ByoungHee

    2016-03-01

    The purpose of this study was to investigate whether action observational training (AOT) plus brain-computer interface-based functional electrical stimulation (BCI-FES) has a positive influence on motor recovery of paretic upper extremity in patients with stroke. This was a hospital-based, randomized controlled trial with a blinded assessor. Thirty patients with a first-time stroke were randomly allocated to one of two groups: the BCI-FES group (n = 15) and the control group (n = 15). The BCI-FES group administered to AOT plus BCI-FES on the paretic upper extremity five times per week during 4 weeks while both groups received conventional therapy. The primary outcomes were the Fugl-Meyer Assessment of the Upper Extremity, Motor Activity Log (MAL), Modified Barthel Index and range of motion of paretic arm. A blinded assessor evaluated the outcomes at baseline and 4 weeks. All baseline outcomes did not differ significantly between the two groups. After 4 weeks, the Fugl-Meyer Assessment of the Upper Extremity sub-items (total, shoulder and wrist), MAL (MAL-Activity of Use and Quality of Movement), Modified Barthel Index and wrist flexion range of motion were significantly higher in the BCI-FES group (p stroke rehabilitation. The limitations of the study are that subjects had a certain limited level of upper arm function, and the sample size was comparatively small; hence, it is recommended that future large-scale trials should consider stratified and lager populations according to upper arm function.

  6. C形臂透视影像的手术引导系统%A Surgical Navigation System Based on C-arm Fluoroscopy Images

    Institute of Scientific and Technical Information of China (English)

    钱理为; 闫士举; 夏庆; 王成焘

    2009-01-01

    A surgical navigation system based on X-rays of C-arm with a calibration target has been studied and developed. Extracting images of markers in the two templates on the calibration target,the system is able to establish the relationship between different markers coordinates in different coordinate systems using the algorithm based on the layout of specific markers. The correction of X-ray image distortion and C-arm camera calibration are performed using the images of calibration target as bases. After the parameters of the C-arm projection model being determined,an X-ray image of surgical site will be acquired preoperatively; the surgical instruments will be tracked by the optical position system,and then virtual projections of instruments can be formed on preoperative images. Surgeons will perform operations with the guidance of the system. The C-arm can be used less frequently and the X-ray radiation can be reduced. Cadaveric spine specimen experiments and error analysis have underpinned the clinical feasibility of the system.%研究开发了一种基于校准靶的C形臂X线影像的手术引导系统.系统通过提取分布在校准靶双层模板上的标志点影像,利用标志点特定的分布,提出了确定对应关系的算法,建立了不同坐标系之间标志点中心坐标的联系.基于校准靶影像,校正C形臂X线影像的失真,对C形臂相机模型进行校准.确定C形臂投影模型参数后,术前预先获得病患部位透视影像,术中通过光学定位系统实时跟踪手术工具,在术前影像上形成工具的虚拟投影,引导医生进行手术,从而减少C形臂的使用次数,降低了X线辐射剂量.脊柱标本实验和误差分析表明该系统在临床有一定的使用价值.

  7. 嵌入式平台ARM-uClinux的构建与应用开发%The Research and Application of Embedded System Based on ARM & uClinux

    Institute of Scientific and Technical Information of China (English)

    黄勋; 唐慧强

    2006-01-01

    介绍了ARM处理器以及嵌入式操作系统uClinux的特点.将uClinux操作系统移植到ARM7上,构建了ARM-uClinux嵌入式平台.以此为基础完成了一种车载GPS接收机的软硬件设计.GP2015作为接收机的射频前端,内嵌ARM7核的GP4020作为接收机的数字基带处理器.此接收机消除以往处理器数据处理的瓶颈效应,解决了体积小,功耗低的问题.

  8. Direct stimulation of bone mass by increased GH signalling in the osteoblasts of Socs2-/- mice.

    Science.gov (United States)

    Dobie, R; MacRae, V E; Huesa, C; van't Hof, R; Ahmed, S F; Farquharson, C

    2014-10-01

    The suppressor of cytokine signalling (Socs2(-/-))-knockout mouse is characterised by an overgrowth phenotype due to enhanced GH signalling. The objective of this study was to define the Socs2(-/-) bone phenotype and determine whether GH promotes bone mass via IGF1-dependent mechanisms. Despite no elevation in systemic IGF1 levels, increased body weight in 4-week-old Socs2(-/-) mice following GH treatment was associated with increased cortical bone area (Ct.Ar) (PGH. Indeed, male Socs2(-/-) mice had increased Ct.Ar (PGH action. Mechanistic studies showed that in osteoblasts and bone of Socs2(-/-) mice, STAT5 phosphorylation was significantly increased in response to GH. Conversely, overexpression of SOCS2 decreased GH-induced STAT5 signalling. Although an increase in Igf1 expression was observed in Socs2(-/-) osteoblasts following GH, it was not evident in vivo. Igf1 expression levels were not elevated in response to GH in 4-week-old mice and no alterations in expression was observed in bone samples of 6-week-old Socs2(-/-) mice. These studies emphasise the critical role of SOCS2 in controlling the local GH anabolic bone effects. We provide compelling evidence implicating SOCS2 in the regulation of GH osteoblast signalling and ultimately bone accrual, which maybe via mechanisms that are independent of IGF1 production in vivo.

  9. SOCS1 mimetics and antagonists: a complementary approach to positive and negative regulation of immune function

    Directory of Open Access Journals (Sweden)

    Chulbul M. Ahmed

    2015-04-01

    Full Text Available Suppressors of cytokine signaling (SOCS are inducible intracellular proteins that play essential regulatory roles in both immune and non-immune function. Of the eight known members, SOCS1 and SOCS3 in conjunction with regulatory T cells play key roles in regulation of the immune system. Molecular tools such as gene transfections and siRNA have played a major role in our functional understanding of the SOCS proteins where a key functional domain of 12 amino acid residues called the kinase inhibitory region (KIR has been identified on SOCS1 and SOCS3. KIR plays a key role in inhibition of the JAK2 tyrosine kinase which in turn plays a key role in cytokine signaling. A peptide corresponding to KIR (SOCS1-KIR bound to the activation loop of JAK2 and inhibited tyrosine phosphorylation of STAT1α transcription factor by JAK2. Cell internalized SOCS1-KIR is a potent therapeutic in the experimental allergic encephalomyelitis (EAE mouse model of multiple sclerosis and showed promise in a psoriasis model and a model of diabetes associated cardiovascular disease. By contrast, a peptide, pJAK2(1001-1013, that corresponds to the activation loop of JAK2 is a SOCS1 antagonist. The antagonist enhanced innate and adaptive immune response against a broad range of viruses including herpes simplex virus, vaccinia virus, and an EMC picornavirus. SOCS mimetics and antagonists are thus potential therapeutics for negative and positive regulation of the immune system.

  10. 寻常型银屑病患者外周血单个核细胞SOCS-1、SOCS-3 mRNA的表达%The expression of SOCS-1 and SOCS-3 mRNA in patients with psoriasis vulgaris

    Institute of Scientific and Technical Information of China (English)

    郭红卫; 王京滨; 李国明; 李顺凡; 吴志华

    2007-01-01

    目的: 检测细胞因子信号抑制因子SOCS-1、SOCS-3 mRNA在寻常型银屑病患者外周血单个核细胞(PBMC)中的表达.方法: 从20例银屑病患者及20例健康志愿者外周血中分离PBMC,提取RNA,应用逆转录-聚合酶链反应(RT-PCR)方法检测SOCS-1、SOCS-3 mRNA的表达.结果: SOCS-1、SOCS-3 mRNA在银屑病患者中表达,在正常人中无表达,活动期银屑病患者较静止期患者SOCS-1、SOCS-3 mRNA表达增高.结论: SOCS-1、SOCS-3可能在银屑病的Th1免疫反应中发挥作用.

  11. Large Catchment Scale Sediment Transport Modelling of SOC Using Environmental Tracers and Remote Sensing

    Science.gov (United States)

    Willgoose, G. R.; Kunkel, V.; Hancock, G. R.; Wells, T.

    2015-12-01

    Soil's potential as a carbon sink for atmospheric CO2 has been widely discussed. Studies of soil organic carbon (SOC) controls, and the subsequent models derived from their findings, have focussed mainly on North American and European regions, and more recently, in regions such as China. In Australia, agricultural practices have led to losses in SOC. This implies that Australian soils have a large potential for increased sequestration of SOC. Building on previous work, here we examine the spatial and temporal variation in soil organic carbon (SOC) and its controlling factors controls across a large catchment of approximately 650 km2 in the Upper Hunter Valley, New South Wales, Australia, using data collected from two sampling campaigns, (April 2006 and June-July 2014). The 2006 data represented a period of long-term drought which effectively ended in 2007 with average and above average subsequent rainfall. In 2007 and 2010 there were a series of extreme rainfall events. 137-Cesium and SOC concentrations were obtained from the sampled soils. Remote sensing using Landsat (30m) and MODIS (250m) NDVI was used to determine if catchment SOC could be predicted using both low and high resolution remote sensing. Relationships between SOC and 137-Cesium for both sampling periods were also quantified. Results indicate that, although moderate resolution (250 m) allows for reasonable prediction of the spatial distribution of SOC, the higher resolution (30 m) improved the strength of the SOC-NDVI relationship. Mean 137-Cesium concentrations were observed to show an increase in deposition at the sample sites over the 8 years between samplings. The relationship between SOC and 137-Cesium, as a surrogate for the erosion and deposition of SOC, suggested that sediment transport and deposition influences the distribution of SOC within the catchment. The increase in 137-Cesium also suggests that increased rainfall and extreme storm events, resulting from climate change, may increase

  12. 基于ARM的ModBus第三方接口协议模块%Third Party Protocol Transfer of ModBus Based on ARM Technology

    Institute of Scientific and Technical Information of China (English)

    申万义; 黄玉宝; 谷一

    2013-01-01

      为满足工业现场各种不同类型模块现场总线之间的数据相互传输的要求,设计了基于ARM硬件和软件体系的第三方接口协议模块。该模块由电源电路,CPU电路,逻辑控制电路和电平转换电路构成,并且基于ARM内核构成各个接口数据采集的驱动程序,实现了不同模块和不同协议之间的信息与数据的传输。测试和实际应用表明,该模块具有较高的实用性和可靠性等优点,达到了预期目的。%Design a third-party protocol module based on ARM hardware and software system to meet the requirement of data transfer and store between some different kinds of modules in industry field. The module consists of power circuit,CPU circuit, logic control circuit and voltage transfer circuit. Driver programs of data collection interface are designed based on ARM core and it realize the data and information transfer in different modules and different protocols. Practicability and reliability are proved in test and practical application.

  13. A new crank arm based load cell, with built-in conditioning circuit and strain gages, to measure the components of the force applied by a cyclist.

    Science.gov (United States)

    Pigatto, Andre V; Moura, Karina O A; Favieiro, Gabriela W; Balbinot, Alexandre; Pigatto, Andre V; Moura, Karina O A; Favieiro, Gabriela W; Balbinot, Alexandre; Moura, Karina O A; Favieiro, Gabriela W; Balbinot, Alexandre; Pigatto, Andre V

    2016-08-01

    This report describes the development of a force platform based on instrumented load cells with built-in conditioning circuit and strain gages to measure and acquire the components of the force that is applied to the bike crank arm during pedaling in real conditions, and save them on a SD Card. To accomplish that, a complete new crank arm 3D solid model was developed in the SolidWorks, with dimensions equivalent to a commercial crank set and compatible with a conventional road bike, but with a compartment to support all the electronics necessary to measure 3 components of the force applied to the pedal during pedaling. After that, a 6082 T6 Aluminum Crankset based on the solid model was made and instrumented with three Wheatstone bridges each. The signals were conditioned on a printed circuit board, made on SMD technology, and acquired using a microcontroller with a DAC. Static deformation analysis showed a linearity error below 0.6% for all six channels. Dynamic analysis showed a natural frequency above 136Hz. A one-factor experiment design was performed with 5 amateur cyclists. ANOVA showed that the cyclist weight causes significant variation on the force applied to the bicycle pedal and its bilateral symmetry.

  14. Design of Constant Pressure Water Supply System Based on ARM and CC-Link%基于ARM和CC-Link的恒压供水加压站设计

    Institute of Scientific and Technical Information of China (English)

    黄江平; 吴昊

    2012-01-01

    To meet the current requirements of constant pressure watei supply station system in China,a design method based on ARM9 and CC-Link was proposed. The hardware was designed,drivers and application software ware were developed. ARM9 microprocessor and CC-Link remote long-distance station's core chip MFP3 was used for embedded hardware ware platform,the operating system was Linux,application software ware was developed with Qt/Embedded. The results show that all parts of the system can slablely operate,it can flexibility to build different needs constant pressure water supply systems,storage and display operation of remote device station work. The instrument can meet the functional requirements of system design.%文中提出了一种基于ARM和CC-Link的恒压供水加压站设计方法,进行了硬件的设计、驱动程序以及应用程序的开发.使用ARM9微处理器和CC-Link远程设备站芯片MFP3作为系统的硬件平台,Linux作为操作系统,应用程序使用Qt/Embedded编写.通过实际运行表明,系统远行稳定,可以灵活地组建不同需求的恒压供水系统,存储和显示远程设备站工作运行情况,实现了系统设计的功能要求.

  15. 基于DSP和ARM的车载组合导航计算机设计%Design of Vehicle Integrated Navigation Computer Based on DSP and ARM

    Institute of Scientific and Technical Information of China (English)

    龚柏春; 李岁劳; 颜开思; 马戎

    2011-01-01

    为了满足项目中对导航系统的小型化、低成本以及高精度等要求,设计了基于DSP和ARM构成的车载双核嵌入式导航计算机系统.采用DSP作为导航解算计算机,完成导航数据的快速融合与解算处理;采用ARM处理器负责系统级的控制和部分数据的采集;采用CPLD完成其他导航数据经V/F后的采集、译码和控制以及时间对准.通过USB接口实现大容量数据存储,通过双口RAM实现双CPU通信.实验结果表明,该系统达到了预期的设计要求.%To meet the requirements of integrated vehicle navigation system, an embedded navigation computer system based on DSP and ARM was designed. The system adopted DSP as navigation computer to complete rapid fusion and calculation of navigation data. ARM CPU completed the system-level control and the acquisition of GPS and image information etc. CPLD completed some decoding, control and the acquisition of other navigation data after V/F. Large amounts of data were stored through the USB interface of S3C2440A, DSP communicated with ARM via dual port RAM. Experimental results show that the system can meet the design requirements.

  16. Building Embedded Linux System Based on ARM%基于ARM的嵌入式Linux系统构建

    Institute of Scientific and Technical Information of China (English)

    冷玉林; 钟将

    2010-01-01

    详细论述了在基于ARM920T核心的S3C2410平台上构建嵌入式Linux系统的过程,包括交叉开发环境的建立,引导加载程序U-Boot、Linux操作系统内核针对特定目标平台的移植,以及根文件系统的建立等.试验结果显示系统在目标平台上运行稳定、可靠,对其它嵌入式系统的开发具有参考意义.

  17. Automatic lumbar vertebrae detection based on feature fusion deep learning for partial occluded C-arm X-ray images.

    Science.gov (United States)

    Li, Yang; Liang, Wei; Zhang, Yinlong; An, Haibo; Tan, Jindong; Yang Li; Wei Liang; Yinlong Zhang; Haibo An; Jindong Tan; Li, Yang; Liang, Wei; Tan, Jindong; Zhang, Yinlong; An, Haibo

    2016-08-01

    Automatic and accurate lumbar vertebrae detection is an essential step of image-guided minimally invasive spine surgery (IG-MISS). However, traditional methods still require human intervention due to the similarity of vertebrae, abnormal pathological conditions and uncertain imaging angle. In this paper, we present a novel convolutional neural network (CNN) model to automatically detect lumbar vertebrae for C-arm X-ray images. Training data is augmented by DRR and automatic segmentation of ROI is able to reduce the computational complexity. Furthermore, a feature fusion deep learning (FFDL) model is introduced to combine two types of features of lumbar vertebrae X-ray images, which uses sobel kernel and Gabor kernel to obtain the contour and texture of lumbar vertebrae, respectively. Comprehensive qualitative and quantitative experiments demonstrate that our proposed model performs more accurate in abnormal cases with pathologies and surgical implants in multi-angle views.

  18. 基于ARM-Linux的酒精发酵远程监控系统的设计与实现%Design and implementation of alcohol fermentation remote monitoring system based on ARM-Linux

    Institute of Scientific and Technical Information of China (English)

    郭鹏飞; 齐跃; 李朝阳; 张建伟

    2012-01-01

    The current alcohol fermentation was supervisory controled mainly by using singlechip and had disadvantages such as backward function,small montioring range and inconvenient information circulation feedback. A remote monitoring system was designed. In this system, the data of pH value and temperature etc were collected and processed based on ARM platform and Linux operation system. The data were also transmitted from alcohol fermentation equipment to host machine using TCP/IP protocol, at the same time it supports remote client to control through the Web, so the remote monitoring was reached for alcohol fermentation equipment. The test results showed that the program broadens the scope of monitoring,and it has a good application prospect.%针对目前酒精发酵主要使用单片机进行实地监控,其功能落后、监控范围小、信息流通反馈不便等问题,设计了一个远程监控系统.该系统采用ARM平台和Linux操作系统实现pH值、温度等数据的采集和处理,并采用TCP/IP协议、依靠网络将酒精发酵设备数据向主机传送,同时支持远程客户通过Web方式对设备进行控制,从而实现对酒精发酵设备的远程监控.测试结果表明该方案拓宽了监控范围,具有良好的应用前景.

  19. A State of the Art Review- Methods to Evaluate Electrical Performance of Composite Cross-arms and Composite-based Pylons

    DEFF Research Database (Denmark)

    Wang, Qian; Bak, Claus Leth; Silva, Filipe Miguel Faria da;

    2016-01-01

    A novel uni-body composite pylon has been proposed for 400 kV transmission lines with advantages of compacted size, friendly looking and cost competitiveness. As its configuration is quite different from the traditional lattice pylon, its electrical performance needs in-depth investigation...... and evaluation, for which electrical testing methods are essential. However, as research on composite-based pylons is still in initial stage, leaving international standards and theoretical analysis on this topic very limited, effective testing methods to evaluate the fully composite pylon’s electrical...... performance need to be studied. This paper sums up experience and key advances on testing methods to evaluate electrical performance of composite cross-arms and composite-based pylons. Based on state of the art review, several feasible testing methods that can be used to verify the feasibility of the novel...

  20. Detecting small-scale spatial heterogeneity and temporal dynamics of soil organic carbon (SOC) stocks: a comparison between automatic chamber-derived C budgets and repeated soil inventories

    Science.gov (United States)

    Hoffmann, Mathias; Jurisch, Nicole; Garcia Alba, Juana; Albiac Borraz, Elisa; Schmidt, Marten; Huth, Vytas; Rogasik, Helmut; Rieckh, Helene; Verch, Gernot; Sommer, Michael; Augustin, Jürgen

    2017-03-01

    Carbon (C) sequestration in soils plays a key role in the global C cycle. It is therefore crucial to adequately monitor dynamics in soil organic carbon (ΔSOC) stocks when aiming to reveal underlying processes and potential drivers. However, small-scale spatial (10-30 m) and temporal changes in SOC stocks, particularly pronounced in arable lands, are hard to assess. The main reasons for this are limitations of the well-established methods. On the one hand, repeated soil inventories, often used in long-term field trials, reveal spatial patterns and trends in ΔSOC but require a longer observation period and a sufficient number of repetitions. On the other hand, eddy covariance measurements of C fluxes towards a complete C budget of the soil-plant-atmosphere system may help to obtain temporal ΔSOC patterns but lack small-scale spatial resolution. To overcome these limitations, this study presents a reliable method to detect both short-term temporal dynamics as well as small-scale spatial differences of ΔSOC using measurements of the net ecosystem carbon balance (NECB) as a proxy. To estimate the NECB, a combination of automatic chamber (AC) measurements of CO2 exchange and empirically modeled aboveground biomass development (NPPshoot) were used. To verify our method, results were compared with ΔSOC observed by soil resampling. Soil resampling and AC measurements were performed from 2010 to 2014 at a colluvial depression located in the hummocky ground moraine landscape of northeastern Germany. The measurement site is characterized by a variable groundwater level (GWL) and pronounced small-scale spatial heterogeneity regarding SOC and nitrogen (Nt) stocks. Tendencies and magnitude of ΔSOC values derived by AC measurements and repeated soil inventories corresponded well. The period of maximum plant growth was identified as being most important for the development of spatial differences in annual ΔSOC. Hence, we were able to confirm that AC-based C budgets are able

  1. SOCS3 inhibiting migration of A549 cells correlates with PYK2 signaling in vitro

    Directory of Open Access Journals (Sweden)

    Zhang Qingfu

    2008-05-01

    Full Text Available Abstract Background Suppressor of cytokine signaling 3 (SOCS3 is considered to inhibit cytokine responses and play a negative role in migration of various cells. Proline-rich tyrosine kinase 2 (PYK2 is a non-receptor kinase and has been found crucial to cell motility. However, little is known about whether SOCS3 could regulate PYK2 pro-migratory function in lung cancer. Methods The methylation status of SOCS3 was investigated in HBE and A549 cell lines by methylation-specific PCR. A549 cells were either treated with a demethylation agent 5-aza-2'-deoxycytidine or transfected with three SOCS3 mutants with various functional domains deleted. Besides, cells were pretreated with a proteasome inhibitor β-lactacystin where indicated. The effects of SOCS3 up-regulation on PYK2 expression, PYK2 and ERK1/2 phosphorylations were assessed by western blot using indicated antibodies. RT-PCR was used to estimate PYK2 mRNA levels. Transwell experiments were performed to evaluate cell migration. Results SOCS3 expression was found impaired in A549 cells and higher PYK2 activity was correlated with enhanced cell migration. We identified that SOCS3 was aberrantly methylated in the exon 2, and 5-aza-2'-deoxycytidine restored SOCS3 expression. Reactivation of SOCS3 attenuated PYK2 expression and phosphorylation, cell migration was inhibited as well. Transfection studies indicated that exogenous SOCS3 interacted with PYK2, and both the Src homology 2 (SH2 and the kinase inhibitory region (KIR domains of SOCS3 contributed to PYK2 binding. Furthermore, SOCS3 was found to inhibit PYK2-associated ERK1/2 activity in A549 cells. SOCS3 possibly promoted degradation of PYK2 in a SOCS-box-dependent manner and interfered with PYK2-related signaling events, such as cell migration. Conclusion These data indicate that SOCS3 negatively regulates cell motility and decreased SOCS3 induced by methylation may confer a migration advantage to A549 cells. These results also suggest a

  2. EtherBone - A Network Layer for the Wishbone SoC Bus

    CERN Document Server

    Kreider, M; Lewis, J; Włostowski, T; Serrano, J

    2011-01-01

    Today, there are several System on a Chip (SoC) bus systems. Typically, these buses are confined on-chip and rely on higher level components to communicate with the outside world. Taking these systems a step further, we see the possibility of extending the reach of the SoC bus to remote FPGAs or processors. This leads to the idea of the EtherBone (EB) core, which connects a Wishbone (WB) Ver. 4 Bus via a Gigabit Ethernet based network link to remote peripheral devices. EB acts as a transparent interconnect module towards attached WB Bus devices. Address information and data from one or more WB bus cycles is preceded with a descriptive header and encapsulated in a UDP/IP packet. Because of this standard compliance, EB is able to traverse Wide Area Networks and is therefore not bound to a geographic location. Due to the low level nature of the WB bus, EB provides a sound basis for remote hardware tools like a JTAG debugger, In-System-Programmer (ISP), boundary scan interface or logic analyser module. EB was de...

  3. Multi Resolution AHB Bus Tracer with Real Time Compression for SOC

    Directory of Open Access Journals (Sweden)

    J. Jagadish Reddy

    2013-01-01

    Full Text Available AMBA (Advanced Microcontroller based Bus Architecture consists of AHB, APB, ASB and AXI. In this project we are Tracing AHB (Advanced High performance Bus signals with Real time Compression and Multi-resolution Techniques. A simple transaction on the AHB consists of an address phase and a subsequent data phase. Access to the target device is controlled through a MUX , thereby admitting bus-access to one bus-master at a time. In AHB Tracer we have to Trace Address signals, Data signals and Control signals, we have to compress them depending on AHB protocols. A multi-resolution AHB on-chip bus tracer is named as SYS_HMRBT (AHB Multi-resolution Bus Tracer and is used for monitoring. The goal is to provide better compression quality and multiple resolution traces to meet the complex SoC debugging needs. Compressing all signals at cycle-accurate-level does not always meet the debugging needs. As SOCs become more complex, the transaction level debugging becomes increasingly important, since it helps designers focus on the functional behaviors, instead of interpreting complex signals. By using this SYS_HMRBT, we can achieve 79%-96% of compression depending on selected resolution mode. Tools Used for this Project are Modelsim for Simulation, and Xilinx ISE II for Synthesis

  4. 基于ARM7的多功能离子导入治疗仪的设计%Design of Multi-functional Iontophoresis Therapeutic Instrument Based on ARM7

    Institute of Scientific and Technical Information of China (English)

    卫亚博; 王军敏; 宋璐

    2012-01-01

    This paper aims to design a kind of new-type multi-functional ions into instrument. It overcomes the shortcomings of single output frequency or be limited to a particular frequency band of most current instruments and realizes different kinds of drug ions importing, maximizes the curative effect of drug ion. Methods: Using the LPC2138 ARM7 core as main control chip, using the AD9834 based on DDS technology as waveform signal chip, after amplifying by power amplifier LF347,the system can realize the independent regulation four channel outputs. Using LCD TFT as dynamic display device, using the API8108A as voice chip, the system can realize dynamic display and voice synchronous told. Results: The output waveform of the system shows that the system realizes multiple frequency and various waveform output, and output amplitude and frequency adjustable, and can realize two treatment function of electric ion into therapy and interference elect oshock therapy through treatment mode choice. Conclusions: The whole system has the advantage of simple circuit structure, low cost, safe and reliable, stable performance and high precision. The system has high human-computer interaction ability and operation is simple. Specially designed electrode loss detection circuit can protect patients by automatic detecting whether the contact of electrode and human body is reliable and prompting user for inspection.%目的:设计一种频率可调的新型多功能离子导入治疗仪,使之能够克服目前国内大部分离子导入仪输出频率单一,或者仅仅局限于某一频段的缺点,可实现不同种类药物离子的导入,最大限度地发挥药物的疗效.方法:采用以ARM7为内核的LPC2138作为主控芯片,使用基于DDS技术的AD9834作为波形信号产生芯片,经过功率放大器LF347放大后,系统可实现独立调节的四通道输出.使用LCD TFT真彩屏作为显示器件,API8108A作为语音芯片,具有动态显示和语音同步告知等功能.

  5. The Impact of Strong Cathodic Polarization on SOC Electrolyte Materials

    DEFF Research Database (Denmark)

    Kreka, Kosova; Hansen, Karin Vels; Jacobsen, Torben

    2016-01-01

    of impurities at the grain boundaries, electrode poisoning, delamination or cracks of the electrolyte etc., have been observed in cells operated at such conditions, lowering the lifetime of the cell1,2. High polarizations are observed at the electrolyte/cathode interface of an electrolysis cell operated at high...... current density. In case of a cell voltage above 1.6 V, p-type and n-type electronic conductivity are often observed at the anode and cathode respectively3. Hence, a considerable part of the current is lost as leakage through the electrolyte, thus lowering the efficiency of the cell considerably.......One of the most promising reversible energy conversion/storage technologies is that of Solid Oxide Fuel/Electrolysis Cells (SOFC/SOEC, collectively termed SOC). Long term durability is typically required for such devises to become economically feasible, hence considerable amount of work has...

  6. Simulated testing system based on ARM9 for optoelectronic measuring in dynamic base%基于ARM9的动基座光电测量仿真检测系统

    Institute of Scientific and Technical Information of China (English)

    毛大鹏; 刘洵; 韩松伟; 杨芳

    2009-01-01

    针对目前动基座光电测量仿真检测系统成本高、人机交互性差、携带不方便的问题,设计出了一种可视化、便携的动基座光电测量仿真栓测系统.该系统采用了三星ARM9处理器、嵌入式Linux操作系统以及Qt/Embedded技术,使用Joystick摇杆和终端控制命令操纵光电平台,由串口通信对平台的各种性能指标进行实时检测.文章介绍了系统组成和软件设计流程,重点时设计中的关键问题--Linux下Joystick编程和串口通信的解决过程进行了阐述.测试表明,该系统具有功能丰富、可靠性高、操作便捷等优点.

  7. Impacts of SOC on car-following behavior and travel time in the heterogeneous traffic system

    Science.gov (United States)

    Tang, Tie-Qiao; Xu, Ke-Wei; Yang, Shi-Chun; Ding, Chuan

    2016-01-01

    Since the SOC (state of charge) of the battery of each electric vehicle directly determines whether the battery should be charged/swapped, the SOC may affect the electric vehicle's driving behavior. In this paper, we introduce the SOC of battery into the electric vehicle's driving behavior model and propose a car-following model for electric vehicles, and then use the proposed model to study the effects of the SOC of battery and battery swap on each vehicle's driving behavior in the heterogeneous traffic system consisting of traditional vehicles and electric vehicles. The numerical results show that the proposed model can reproduce some complex traffic phenomena resulted by the SOC of battery and battery swap and that the influences on each vehicle's driving behavior are directly related to the initial traffic state, the electric vehicle's proportion, and the SOC of battery.

  8. NIRS as an alternative to conventional soil analysis for Greenland soils (focus on SOC)

    DEFF Research Database (Denmark)

    Knadel, Maria; Ogric, Mateja; Adhikari, Kabindra;

    Soil organic carbon (SOC) is an important soil property. It is the main constituents of soil organic matter and a good indicator of soil quality. The estimation and mapping of SOC content could be used to select potential agricultural areas in the Arctic areas. However, conventional analysis of SOC...... are time consuming and expensive. They involve a lot of sample preparation, and chemicals and are destructive. Near infrared spectroscopy (NIRS) in the range between 400 and 2500 nm is an alternative method for SOC analysis. It is fast and non-destructive. The aims of this study where to test...... the feasibility of using NIRS to estimate SOC content on a landscape and field scale in Greenland. Partial Least squares regression models were built to correlated soil spectra and their reference SOC data to develop calibration models. Very good predictive ability for both landscape and field scale were obtained...

  9. 基于ARM-Linux的超声波测距系统设计与实现%Design and Implementation of Ultrasonic Distance Measure System Based on ARM-Linux

    Institute of Scientific and Technical Information of China (English)

    洪松; 朱龙英

    2013-01-01

    针对ARM-Linux平台下对超声波测距研究较少的问题,根据超声波的工作原理,利用字符设备驱动编写的基本方法,用ARM处理器在Linux2.6内核下实现了超声波模块和温度传感器驱动程序和应用程序的开发.实验结果表明,经过温度补偿方法,测量的数据准确,稳定性和实时性好,实现了ARM-Linux下对HC-SR04和DS18B20的支持,并已应用在移动机器人控制系统中,且运行效果良好.%In order to resolve the problems of ultrasonic distance measure under the ARM-Linux platform, following the working principe of ultrasonic and basic method of character device driver written,the ultrasonic modular and temperature sensor driver program and application program were designed and implemented under the ARM processor and the kernel of Linux2.6. Experimental results show that the measurement data was accurate,stable and real-time using temperature compensation method.it has accomplished the support of HC-SR04 sensor and DS18B20 sensor under the ARM-Linux platform,and has been applied in the mobile robot control system,and run to good effect.

  10. Design of wireless video transmisslon system based on ARM%基于ARM的无线视频传输系统的设计

    Institute of Scientific and Technical Information of China (English)

    徐驰

    2011-01-01

    A wireless video teansmission system which will be used for low frame rate application was desugned.This system will wirelessly transmit the content of the PC's screen to the projector.The video sender in this system is normal PC,and the receiver is an ARM11-based embedded system.It transmits JPEG images on a Wi-Fi data.This system mainly aims at teaching and meeting related application.This system can reduce the use of cable in demonstration occasions,and help people get rid of frequent plugging and unplugging.%设计一套低帧速无线视频传输系统,将个人计算机屏幕上的图像通过无线的方式传输到投影仪上.系统中视频发送端采用普通个人计算机,视频接收端是基于ARM11的嵌入式系统.所传输图像使用JPEG标准进行压缩,传输数据链路为Wi-Fi.该系统主要用于教学、会议等场合.本系统可以减少演示场合的线缆,并省去频繁插拔的麻烦.

  11. Design of the fingerprint identification system based on ARM-Linux%基于ARM—Linux指纹识别系统的设计

    Institute of Scientific and Technical Information of China (English)

    王伟; 李春明

    2012-01-01

    生物识别技术应用越来越广泛,指纹识别技术尤为突出。设计了以ARM9为核心的硬件平台。并进行了嵌入式Linux内核的移植,结合硬件特点,将优化后的指纹识别算法作为应用程序移植到软硬件平台。实验表明,系统运行稳定,算法效率和精确度较高,在嵌入式生物识别技术应用领域有一定的参考价值。%The application of biometric identification technology is more widely used by people, especially fingerprint identification technology. The following design base on ARM9 as the core of hardware platform, and an Linux kernel is embedded in it. Optimized algorithms of fingerprint identification are transplanted to software and hardware plaffowa combined with the hardware features. Experiments showed that the system is stable, the algorithm efficiency and the precision are higher. It is certain reference value in the embedded biometric identification technology.

  12. Design and research of warehouse management system based on ARM%基于ARM的仓储管理系统设计与研究

    Institute of Scientific and Technical Information of China (English)

    杨威; 高文华; 罗洪达; 张震震

    2013-01-01

    In accordance with the applicable demands and features of warehouse, analyze and research has been done, then a new design proposal of warehouse management system is presented. The monitoring system was built based on ARM microprocessor Cortex-A8 and embedded Linux operating system, the warehouse control system was compiled by QT through using its various sources. The system realizes the smart management of warehouse.%针对仓库储藏货物的应用需求和特点,对仓储系统进行分析和研究,提出了一种仓储管理系统的整体设计方案,以ARM Cortex-A8为核心处理器,Linux嵌入式系统为仓储管理的控制系统,利用QT提供的各种资源建立仓储管理系统控制软件,实现了仓库的智能化管理.

  13. ARM-Based Data Acquisition and Storage System Design%基于ARM的数据采集存储系统设计

    Institute of Scientific and Technical Information of China (English)

    王红亮; 符多铎; 广威; 刘文怡

    2014-01-01

    介绍了一种基于ARM11的数据采集存储系统的设计原理和实现方法,以低功耗微处理器S3C6410为核心,并搭建嵌入式Linux系统平台来实现,其中数据采集模块主要包括信号调理电路、A/D转换和系统控制中心3个部分,数据存储模块由NAND Flash存储来实现,通过实验验证,本设计实现了数据实时监测,数据存储和数据回传等功能。%The paper introduces the basic principle and implementation of ARM-based data acquisition and storage system.S3C6410,low-power microprocessor,is the core,and the embedded Linux system platform is built to achieve.The data acquisition module includes three parts,which contain signal conditioning circuit,A/D converter,system control center,and the data storage module consists of NAND Flash storage.Through experiments,the design has finished real-time data monitoring,data storage and data backhaul and other functions.

  14. 荩于ARM的车载CAN总线智能终端设计%Design of Intelligent Terminal of Vehicle-mounted CAN Bus Based on ARM

    Institute of Scientific and Technical Information of China (English)

    王保和

    2011-01-01

    介绍了一种以基于ARM9内核的S3C2440微处理器为硬件核心的嵌入式Linux车载CAN总线智能节点的设计方法,详细描述了CAN总线控制器MCP2510的特点以及接口电路,同时给出了嵌入式Linux下的底层驱动程序,最后给出了利用Qt开发的图形用户界面。%An embedded Linux vehicle-mounted CAN bus intelligent node was designed, which took ARM9-based S3C2440 microprocessor as hardware core. The features of CAN bus controller MCP2510 and its interface circuit are in- troduced, an embedded Linux low-level drivers is proposed, and the graphical user interface developed by Qt is put forward.

  15. Optimization-Based Design of a Small Pneumatic-Actuator-Driven Parallel Mechanism for a Shoulder Prosthetic Arm with Statics and Spatial Accessibility Evaluation

    Directory of Open Access Journals (Sweden)

    Masashi Sekine

    2013-07-01

    Full Text Available Human arms undertake most tasks in the activities of daily living (ADLs. When designing shoulder prostheses for high‐level upper‐limb amputees, we should consider not only how to realize high degrees of freedom under weight and shape constraints but also the user’s individual task space in daily life. An appropriate mechanical structure that can make full use of state‐of‐the‐art actuators and a scheme to optimize the structure’s configuration to match users’ spatial access and manipulability requirements are essential. In our previous research, a small pneumatic‐actuator‐driven parallel mechanism was studied as a shoulder prosthetic arm. In this paper, a systematic procedure is proposed to design the mechanism for a shoulder prosthesis considering force and spatial accessibility. This procedure includes ADL measurements to obtain the task spaces for individual subjects, indexes to evaluate the force and spatial accessibility and an optimization process based on kinematic and statics models. With this approach, the parallel mechanism was optimized for one important ADL task group, considering the trade‐off between its required force and working space. Moreover, it was confirmed that the proposed design procedure could find solutions for various spatial specifications. That is, the approach could be used for individualized shoulder prosthesis design.

  16. Sense of Coherence and Physical Health. A “Copenhagen Interpretation” of Antonovsky's SOC Concept

    Directory of Open Access Journals (Sweden)

    P. Christian Endler

    2008-01-01

    Full Text Available According to Antonovsky's (Aaron Antonovsky, 1923–1994 sense of coherence (SOC model, persons with a high SOC have the ability to benefit from their general defense mechanisms in order to overcome stressful situations. In a health-disease continuum, this leads to the development towards health. However, Antonovsky's global hypothesis that the strength of the SOC may influence the physical health status of a person could not be proven.

  17. [Structural analysis for psychosocial factors including health locus of control (HLC) and sense of coherence (SOC) associated with lifestyle-related diseases].

    Science.gov (United States)

    Ogawa, Y; Nakamura, H; Nagase, H; Ogino, K; Ooshita, Y; Tsukahara, S

    2001-01-01

    The purpose of this study was to clarify psychosocial characteristics associated with preventive health behavior for lifestyle-related diseases. The author performed objective health examinations and gave questionnaires to 289 men (39.7 +/- 11.8 years, mean +/- SD) and 80 women (32.8 +/- 10.4 years) engaged in office work. Psychosocial factors included lifestyle and perceived stress, as well as the health locus of control (HLC) and sense of coherence (SOC) as newly developed indicators for health behavior. The principal component analysis for men did not extract lifestyle from the psychosocial structures. Multiple regression analysis showed that internal HLC (IHLC), chance HLC (CHLC), professional HLC (PHLC) and stress significantly contributed to SOC. Principal component analysis using psychosocial factors in women showed two psychosocial structures, i.e. the second principal (high SOC, high lifestyle, and low stress) and the 4th principal components (high supernatural HLC, and high PHLC). Both components were negatively correlated with systolic blood pressure. SOC was recognized to be negatively associated with age, stress, and total cholesterol, and positively with IHLC, FHLC, lifestyle, and gamma-GTP using multiple regression analysis for women. These results indicated a distinguishable sex difference regarding the involvement of psychosocial factors including HLC and SOC in objective health. SOC seems likely to be involved not in objective health, but closely with stress, suggesting a direct influence on mental health. Lifestyle should be divided into more detailed categories such as smoking and salt intake. Structural analysis of women suggests that SOC is involved directly or indirectly through lifestyle in objective health, different from men. To further clarify causal relationships between psychosocial factors and risk factors for lifestyle-related diseases, a longitudinal study is necessary based on these results.

  18. Crystal structure, characterization and magnetic properties of a 1D copper(II) polymer incorporating a Schiff base with carboxylate side arm

    Indian Academy of Sciences (India)

    SHYAMAPADA SHIT; MADHUSUDAN NANDY; CORRADO RIZZOLI; CÉDRIC DESPLANCHES; SAMIRAN MITRA

    2016-06-01

    A new 1D polymeric copper(II) complex [{Cu(L)$(CF_{3}COO)}2]_{n}$ has been synthesized using apotentially tetradentate Schiff base ligand, HL, ((E)-2-((pyridin-2-yl)methyleneamino)-5-chlorobenzoic acid)and characterized by different spectroscopic methods. Single crystal X-ray structural characterization revealsthat the side arm carboxylate group of the coordinated Schiff base exhibits a $μ_{1,3}$ -bridging mode and connectsthe neighbouring copper(II) ions leading to a zigzag 1D chain structure where the copper(II) ions displaydistorted square pyramidal geometries. Variable temperature magnetic susceptibility measurement reveals aweak antiferromagnetic exchange (J = −0.47±0.01 $cm_{−1}) prevails between copper(II) ions in the chainmediated by the bridging carboxylate group, is also supported by the room temperature EPR spectral study.Electrochemical property of the complex is also reported.

  19. What are the effects of agricultural management on soil organic carbon (SOC) stocks?

    DEFF Research Database (Denmark)

    Söderström, Bo; Hedlund, Katarina; Jackson, Louise E.

    2014-01-01

    Changes in soil organic carbon (SOC) stocks significantly influence the atmospheric C concentration. Agricultural management practices that increase SOC stocks thus may have profound effects on climate mitigation. Additional benefits include higher soil fertility since increased SOC stocks improve......, such as oxidation/mineralization, leaching and erosion. However, a systematic review comparing the efficacy of different agricultural management practices to increase SOC stocks has not yet been produced. Since there are diverging views on this matter, a systematic review would be timely for framing policies...

  20. Promotion of Erythropoietic Differentiation in Hematopoietic Stem Cells by SOCS3 Knock-Down.

    Directory of Open Access Journals (Sweden)

    Yu-xiao Liu

    Full Text Available Suppressor of cytokine signaling 3 (SOCS3 plays an important role in mice fetal liver erythropoiesis, but the roles of SOCS3 in human hematopoietic stem cells (HSCs have not been well investigated. In the present study, lentiviral small interference RNA expression vectors (shRNA of SOCS3 were constructed and stably transferred into HSCs. We found that SOCS3 knockdown induced erythroid expansion in HSCs. Conversely, Ectopic expression of SOCS3 in progenitor cells blocked erythroid expansion and erythroid colony formation of HSCs. To further explore the involved mechanism, we compared gene expression profiles of SOCS3-shRNA tranduced HSCs with that of control HSCs by whole genome microarrays. The results indicated that cell developmental process related genes, especially hematopoietic lineage-specific genes, associated with the responses to SOCS3 in HSCs.Downexpression of SOCS3 in HSCs or differentiated erythroid progenitor cells induced a transcriptional program enriched for erythroid development relative genes. Our results proved that SOCS3 down-expression induced lineage commitment towards erythroid progenitor cell fate by activation of erythroid-specific gene in HSCs and provided new insight into the mechanism of erythropoietic development.

  1. Favorable prognostic value of SOCS2 and IGF-I in breast cancer

    Directory of Open Access Journals (Sweden)

    Daxenbichler Günter

    2007-07-01

    Full Text Available Abstract Background Suppressor of cytokine signaling (SOCS proteins comprise a protein family, which has initially been described as STAT induced inhibitors of the Jak/Stat pathway. Recent in vivo and in vitro studies suggest that SOCS proteins are also implicated in cancer. The STAT5 induced IGF-I acts as an endocrine and para/autocrine growth and differentiation factor in mammary gland development. Whereas high levels of circulating IGF-I have been associated with increased cancer risk, the role of autocrine acting IGF-I is less clear. The present study is aimed to elucidate the clinicopathological features associated with SOCS1, SOCS2, SOCS3, CIS and IGF-I expression in breast cancer. Methods We determined the mRNA expression levels of SOCS1, SOCS2, SOCS3, CIS and IGF-I in 89 primary breast cancers by reverse transcriptase PCR. SOCS2 protein expression was further evaluated by immuno-blot and immunohistochemistry. Results SOCS2 expression inversely correlated with histopathological grade and ER positive tumors exhibited higher SOCS2 levels. Patients with high SOCS2 expression lived significantly longer (108.7 vs. 77.7 months; P = 0.015 and high SOCS2 expression proved to be an independent predictor for good prognosis (HR = 0.45, 95% CI 0.23 – 0.91, P = 0.026. In analogy to SOCS2, high IGF-I expression was an independent predictor for good prognosis in the entire patient cohort. In the subgroup of patients with lymph-node negative disease, high IGF-I was a strong predictor for favorable outcome in terms of overall survival and relapse free survival (HR = 0.075, 95% CI 0.014 – 0.388, P = 0.002. Conclusion This is the first report on the favorable prognostic value of high SOCS2 expression in primary mammary carcinomas. Furthermore a strong association of high IGF-I expression levels with good prognosis was observed especially in lymph-node negative patients. Our results suggest that high expression of the STAT5 target genes SOCS2 and IGF

  2. Expression of SOCS-1 in the liver tissues of chronic hepatitis B and its clinical significance

    Institute of Scientific and Technical Information of China (English)

    Zhi-Xin Zhao; Qing-Xian Cai; Xiao-Mou Peng; Yu-Tian Chong; Zhi-Liang Gao

    2008-01-01

    AIM: To study the expression of suppressor of cytokine signaling-1 (SOCS-1) in the liver tissues of chronic hepatitis B (CHB) and the clinical significance of this expression.METHODS: The expression of SOCS-1 in liver tissues of 45 cases of CHB was investigated by immunohistochemical staining, and its correlations with inflammation grades and fibrosis stage were analyzed by SPSS statistics software.RESULTS: The result showed SOCS-1 expressing could be observed in the liver tissue of CHB. The expression of SOCS-1 was mainly distributed near the portal area in the liver tissue of mild inflammation CHB group, and was diffusely distributed in the liver tissue of moderate and severe inflammation groups. SOCS-1 positive stains mainly appear in the hepatocytes, only a few of liver interstitial cells were involved. Inside the hepatocyte, SOCS-1 positive stains are mainly distributed in the plasma. Some of the staining was observed on the membrane. The inclusion bodies in the plasma of hepatocytes were observed occasionally. There were both obvious correlations between the expression of SOCS-1 and the inflammatory grade, and that between the expression of SOCS-1 and the fibrosis stage.CONCLUSION: The distribution of SOCS-1 in the liver tissue of CHB is variable. This expression was correlated with the inflammation grade and fibrosis stage.

  3. [Effect of reclamation on the vertical distribution of SOC and retention of DOC].

    Science.gov (United States)

    Huo, Li-Li; Zou, Yuan-Chun; Guo, Jia-Wei; Lü, Xian-Guo

    2013-01-01

    Contents and density of soil organic carbon (SOC) in soil profiles and dissolved organic carbon (DOC) of soil solution in different soil depths in wetland, soybean and paddy field reclaimed from the wetland around Xingkai Lake were determined to investigate how reclamation of wetland for soybean and rice farming impacts vertical distribution of SOC and retention of DOC. SOC contents in 0-40 cm soil layers were significantly influenced. SOC contents in 0-10, 10-20, 20-30 and 30-40 cm soil layers in soybean and paddy field were 79.07% and 82.01%, 79.01% and 82.28%, 79.86% and 92.90%, 37.49% and 78.05% respectively lower than those in wetland. Before and after reclamation, SOC contents in soil layers deeper than 40 cm were not significantly different. SOC densities in soybean and paddy field were 25.50% and 47.35% respectively lower than those in wetland. However, either in wetland or farm land, most of the SOC storage in 0-100 cm soil layer was stored in 0-50 cm soil layer. The relationships between SOC content and soil depth in wetland and two farm lands all could be described by exponential functions; cultivation did not change the variation of SOC content with soil depth. The retention of DOC was more obvious for soybean farming than wetland and rice farming, and that was roughly the same for wetland as rice farming.

  4. Investigation of an efficient short-scan C-arm reconstruction method with radon-based redundancy handling

    Science.gov (United States)

    Dennerlein, Frank; Kunze, Holger

    2014-03-01

    The short-scan Feldkamp David Kress (FDK) method for C-arm CT reconstruction involves a heuristic raybased weighting scheme to handle data redundancies. This scheme is known to be approximate under general circumstances and it often creates low frequency image artifacts in regions away from the central axial plane. Alternative algorithms, such as the one proposed by Defrise and Clack (DC),1 can handle data redundancy in a theoretically exact manner and thus notably improve image quality. The DC algorithm, however, is computationally more complex than FDK, as it requires a shift-variant 2D filtering of the data instead of a efficient 1D filtering. In this paper, a modification of the original DC algorithm is investigated, which applies the efficient FDK filtering scheme whereever possible and the DC filtering scheme only where it is required. This modification leads to a more efficient implementation of the DC algorithm, in which filtering effort can be reduced by up to about 70%, dependent on the specific geometry set-up. This gain in computation speed makes the DC method even more attractive for use in an interventional environment, where fast and interactive X-ray imaging is a crucial requirement.

  5. 基于ARM的手机位置采集及跟踪研究%Research of mobile phone location acquisition and tracking based on ARM

    Institute of Scientific and Technical Information of China (English)

    包理群; 吕林霞; 李祥林

    2016-01-01

    In view of the demand of real-time location data acquisition and location tracking for spe-cial groups, GPS location data acquisition algorithm and the update algorithm for data acquisition interval are studied in this paper. The mobile location tracking system based on ARM and Google Maps are de-signed and implemented. The users take GPS smart phones with them when they go out. The guardian can check their location in real-time on the map through portable embedded terminals. It send out alarm in-formation when users are close to or enter the danger zone. It can be widely used in the elderly, chil-dren, the disabled and other special groups of protection. The embedded location information database is created based on ARM platform, which is used to store all the time and location data when users are not at home. It can provide data support for big data research based on the smart phone positioning data. Ex-periments tests the reproducibility of the GPS data, the performance of location information database and ARM position tracking system,and verified the effectiveness of the algorithm and the feasibility of the de-sign.%针对特殊群体的实时位置跟踪需求,研究了GPS位置数据获取算法和数据采集时间间隔更新算法,设计实现了基于ARM和Google Maps的手机位置跟踪系统. 用户只需随身携带GPS手机,监护人即可通过嵌入式移动终端在地图上实时查看其位置信息,并在用户接近和进入危险区域时报警,可应用于老人、小孩、残疾人等特殊群体的保护. 基于ARM的嵌入式位置信息数据库保存了用户出行数据,为智能手机定位的大数据研究提供支持. 通过对GPS数据重复性、位置信息数据库以及ARM位置跟踪系统的性能测试,验证了算法的有效性及设计思路的可行性.

  6. 基于ARM920 T嵌入式低频数字扫描仪设计%Design of ARM920T-based embedded low-frequency digital scanner

    Institute of Scientific and Technical Information of China (English)

    刘顺财

    2014-01-01

    系统采用ARM920T作为核心处理器,以低频信号作为信号源,采用DDS技术,从而实现相频、幅度、频率特性的分析仪器,能够简单地实现信号源的时域和具体参数的波形。系统主要由ARM920T控制处理器、DDS扫频模块、ADC采样模块、DAC输出模块、检波滤波器模块、扫频信号源幅度模块组成。其中处理器采样ARM920T,扫频信号源采样DDS芯片AD9851,检波模块以AD637JQ芯片构成,相位检测模块由AD8302芯片构成,DAC芯片TLV5618控制扫频信号的幅度。实验结果表明,仪器可以检测20 Hz~1 MHz左右的频率信号源,可以显示在LCD屏幕上,直观地读出频率、幅度和相位。%Direct digital synthesizer (DDS )technology was employed to implement phase frequen-cy,amplitude,frequency characteristics analysis instruments,in which advanced RISC machines (ARM)920T was adopted as core processor and low frequency signal as the signal source.The sys-tem can simply realize the time domain of signal sources and specific parameters waveforms (simple signal source in the time domain waveform and specific parameters ),which mainly consists of ARM920T processor,DDS frequency sweeping module,analog to digital converter (ADC)sampling module,digital to analog converter (DAC)output module,waveforms detection filter module and frequency sweeping signal source amplitude module.The processor sampling was controlled by ARM920T,while the frequency sweeping signal source sampling was implemented by DDS chip AD9851.The waveform detection module was controlled by AD637JQ chip.The phase detection module and the frequency sweeping signal amplitude were controlled by AD8302 chip and the DAC chip TLV5618,respectively.The instrument can detect frequency signal source ranged between 20 Hz to 1 MHz and can directly display frequency,amplitude and phase on the liquid crystal display (LCD)screen.

  7. Design of mine DC electrical prospecting instrument based on ARM Cortex-M3 core%基于ARM Cortex-M3内核矿井直流电法仪的研制

    Institute of Scientific and Technical Information of China (English)

    宁殿艳; 张仲礼; 王继矿; 汪凯斌; 李超

    2011-01-01

    DC electrical prospecting instrument has played an important role in preventing mine water disaster, but the traditional DC electrical prospecting instrument has some disadvantages such as high power consumption, small storage capacity, hard operation and difficulty to carry, for it is mostly developed utilizing MCS -51 microcontroller. These restrict the application of DC electrical prospecting instrument to a certain extent. This article begins with the working principle of mine DC electrical, improves the traditional DC electrical prospecting instrument utilizing STM32 microcomputer based on Cortex - M3 core and 24 - bit Σ - A ADC component, and redesigns the hardware and software of mine DC eldetrieal instrument. The improved instrument has the advantage of high accuracy, low cost, low power consumption, large storage capacity, convenient communication and friendly man-machine interface compared with traditional DC electrical prospecting instrument.%直流电法仪在预防煤矿水害中发挥重要作用,但传统直流电法仪的核心芯片多采用51系列单片机,具有功耗大、存储容量小、操作不方便,难以携带等缺点,在一定程度上制约了直流电法仪的应用.文中从矿井直流电法仪的工作原理出发,采用基于ARM Cortex-M3内核的STM32处理器和基于Σ-Δ技术的24位高分辨率ADC器件对传统矿井直流电法仪进行了升级、改造,重新设计了硬件电路和软件程序.与传统矿井直流电法仪相比,新设计的直流电法仪具有精度高、成本低、功耗小、存储容量大、通讯方便和人机界面友好等优点.

  8. System on chip (SoC) microcontrollers (μC) as digitisers for ion beam analysis (IBA) instruments

    Science.gov (United States)

    Whitlow, Harry J.

    2016-09-01

    Data digitisation of the analogue signals from detectors to digital data is an essential process in ion beam analysis (IBA). The low-cost, easy availability and development environments that have a low learning threshold makes system-on-chip (SoC) microcontrollers (μC) attractive for this task. These μC combine, on one die, analogue and digital inputs and outputs with serial USB interfaces, which opens up simple implementation of tailor-made interfaces for specific IBA measurement systems. We have investigated the design and performance limitations based on development of three different digitisation interfaces for IBA. These were a two-channel nuclear instrumentation module (NIM) ADC event mode interface (EMI) for a high-resolution magnetic RBS spectrometer, a simple headless-multi-channel analyser (MCA) and a combined dual channel headless MCA and EMI. It is shown that SoC μC based interfaces for digitisation of analogue spectroscopy pulses in IBA systems can be implemented for material costs less than 100 €. The performance of the SoC devices for many IBA applications is close to what can be achieved with state-of-the-art instruments. The simple pulse spectroscopy interface circuit and software are included in the auxiliary archive.

  9. ARM9-based Design of Industrial Ethernet EtherCAT Slave Station%基于ARM9的工业以太网EtherCAT从站设计

    Institute of Scientific and Technical Information of China (English)

    汪雅楠; 谭南林

    2011-01-01

    介绍了EtherCAT的通信原理和相关功能模块,设计了一种基于ARM9的EtherCAT从站,并按照功能模块详细介绍了从站的软、硬件设计.最后提出了一种基于此平台实现两个EtherCAT网段时钟同步的解决方案.

  10. Nonspecific Arm Pain

    Directory of Open Access Journals (Sweden)

    Ali Moradi

    2013-12-01

    Full Text Available Nonspecific activity-related arm pain is characterized by an absence of objective physical findings and symptoms that do not correspond with objective pathophysiology. Arm pain without strict diagnosis is often related to activity, work-related activity in particular, and is often seen in patients with physically demanding work. Psychological factors such as catastrophic thinking, symptoms of depression, and heightened illness concern determine a substantial percentage of the disability associated with puzzling hand and arm pains. Ergonomic modifications can help to control symptoms, but optimal health may require collaborative management incorporating psychosocial and psychological elements of illness.

  11. Nonspecific Arm Pain

    Directory of Open Access Journals (Sweden)

    Ali Moradi

    2013-12-01

    Full Text Available   Nonspecific activity-related arm pain is characterized by an absence of objective physical findings and symptoms that do not correspond with objective pathophysiology. Arm pain without strict diagnosis is often related to activity, work-related activity in particular, and is often seen in patients with physically demanding work. Psychological factors such as catastrophic thinking, symptoms of depression, and heightened illness concern determine a substantial percentage of the disability associated with puzzling hand and arm pains. Ergonomic modifications can help to control symptoms, but optimal health may require collaborative management incorporating psychosocial and psychological elements of illness.

  12. Arms Trafficking and Colombia

    Science.gov (United States)

    2003-01-01

    Brasil , February 20, 2001. 20 Arms Trafficking and Colombia chased, when and how they were transferred to the guerrillas or paramilitaries, or through...Mercado Blanco De Armas,” 1999, p. 44. 31Franco, Ilimar, “Pf to Block Farc Supply Routes in Amazon,” Jornal do Brasil , August 20, 1999. 26 Arms...Forces Mobilize in Response to Farc,” Sao Paulo Veja, November 10, 1999. 43“Arms Trafficking to Colombia Increases,” El Comercio , August 23, 2000

  13. 基于ARM平台的巴克豪森噪声应力检测系统%Barkhausen Noise Stress Testing System Based on ARM Platform

    Institute of Scientific and Technical Information of China (English)

    王平; 任紫锋; 田贵云; 袁奇; 曹锐

    2012-01-01

    This paper presented the theory of Barkhausen noise method. Based on further research and analysis of Barkhausen noise method, a new portable Barkhausen noise stress testing system was proposed. In this system, overall construction of the exciting signal generation, stress data sampling, data processing and host controller interface parts were based on ARM platform and DSP platform. Combining Barkhausen noise stress testing technology with some advanced technologies, such as embedded Linux operation system and digital signal processing, could provide a very friendly and convenient host controller interface and meet the requirements of some key performance indexes of Barkhausen noise method, such as high sampling frequency and sampling signal filtering processing. This paper mainly stated the design plan of ARM platform.%基于对巴克豪森噪声方法的深入研究和分析,提出了一种新型便携式巴克豪森噪声应力检测系统,并着重阐述了ARM平台的设计方案。该系统以ARM平台和DSP系统为核心,构成产生激励信号、应力数据采集、应力数据处理和人机交互界面的总体框架。将巴克豪森噪声应力检测技术、嵌入式Linux操作系统和先进的数字信号处理等技术相结合,提供了友好便捷的人机交互界面,并且满足了巴克豪森噪声方法中信号高频采样、采样信号滤波处理等关键性能指标的要求。

  14. Design and Implementation of GPS Signal Simulator Based on ARM%GPS信号仿真器方案设计与实现

    Institute of Scientific and Technical Information of China (English)

    谢杰; 侯博; 石阳; 姚志成

    2012-01-01

    The paper designed and implemented a kind of portable GPS signal simulator based on embedded ARM/DSP and FPGA. Cubic spline numerica method, with high computation ability and low error was proposed to simulate GPS satellite orbits. Meanwhile, the modularization design can be easily extended to Multi - Mode Satellite signal simulator. The implementation of complex GPS signal simulator was validated by commercial receiver. Compared with usual simulators based on PC, this one is smaller, lighter and more convenient to be used. It can provide a standard signal for receiver production lines and military experiment.%研究优化GPS导航系统仿真器设计,要实现一种便携式GPS卫星信号仿真器.由于系统要求实时性强和定位精度高,嵌入式ARM+ DSP+ FPGA的硬件架构的仿真器平台有限的运算和存储能力不能满足要求,因此提出了GPS轨道仿真的三次样条插值仿真算法,运算量小、计算速度快、误差小,同时采用模块化设计并预留接口,方便扩展开发,可作为多种卫星的仿真器.进行仿真的结果表明,实现了GPS复杂系统仿真的实时性,仿真信号频谱特性较好,定位准确,可为导航系统设计和军用实验提供了可靠依据.

  15. Driver Development of Intelligent Car Based on ARM%基于ARM的智能小车驱动程序的开发

    Institute of Scientific and Technical Information of China (English)

    刘崇翔; 于力革; 高美凤

    2012-01-01

    介绍一种基于MiniARM的智能小车的硬件设计方案与驱动程序的开发,采用MiniARM工控板M2005-NU11为核心控制器,MiniARM内嵌μC/OS-Ⅱ操作系统,提供基本的板级驱动.本文基于该软件平台,对直流电机、温度传感器DS18B20、超声波传感器进行驱动程序开发,并将测得的数据通过串行通信传输到计算机.利用系统提供的硬件驱动支持库,无需了解硬件的细节就可通过API函数操作硬件,极大地缩短了开发时间.%The hardware design and driver development of the intelligent car based on MiniARM is presented. MiniARM TPC board M2005-NU11 embedded μC/OS-Ⅱ operating system is used as the core controller, which provides the basic board-level driver. Based on this software platform, the drivers of DC-motors, temperature sensors DS18B20, and ultrasonic sensors are de-veloped; and the measured data are transported to the computer via serial communication. Using the hardware driver support li-brary and API functions, the hardware can be operated without knowing their details, so the development time is reduced greatly.

  16. Energy efficiency vs. performance of the numerical solution of PDEs: An application study on a low-power ARM-based cluster

    Science.gov (United States)

    Göddeke, Dominik; Komatitsch, Dimitri; Geveler, Markus; Ribbrock, Dirk; Rajovic, Nikola; Puzovic, Nikola; Ramirez, Alex

    2013-03-01

    Power consumption and energy efficiency are becoming critical aspects in the design and operation of large scale HPC facilities, and it is unanimously recognised that future exascale supercomputers will be strongly constrained by their power requirements. At current electricity costs, operating an HPC system over its lifetime can already be on par with the initial deployment cost. These power consumption constraints, and the benefits a more energy-efficient HPC platform may have on other societal areas, have motivated the HPC research community to investigate the use of energy-efficient technologies originally developed for the embedded and especially mobile markets. However, lower power does not always mean lower energy consumption, since execution time often also increases. In order to achieve competitive performance, applications then need to efficiently exploit a larger number of processors. In this article, we discuss how applications can efficiently exploit this new class of low-power architectures to achieve competitive performance. We evaluate if they can benefit from the increased energy efficiency that the architecture is supposed to achieve. The applications that we consider cover three different classes of numerical solution methods for partial differential equations, namely a low-order finite element multigrid solver for huge sparse linear systems of equations, a Lattice-Boltzmann code for fluid simulation, and a high-order spectral element method for acoustic or seismic wave propagation modelling. We evaluate weak and strong scalability on a cluster of 96 ARM Cortex-A9 dual-core processors and demonstrate that the ARM-based cluster can be more efficient in terms of energy to solution when executing the three applications compared to an x86-based reference machine.

  17. Kinase inhibition, competitive binding and proteasomal degradation: resolving the molecular function of the suppressor of cytokine signaling (SOCS) proteins.

    Science.gov (United States)

    Linossi, Edmond M; Nicholson, Sandra E

    2015-07-01

    The suppressor of cytokine signaling (SOCS) family of proteins are key negative regulators of cytokine and growth factor signaling. They act at the receptor complex to modulate the intracellular signaling cascade, preventing excessive signaling and restoring homeostasis. This regulation is critical to the normal cessation of signaling, highlighted by the complex inflammatory phenotypes exhibited by mice deficient in SOCS1 or SOCS3. These two SOCS proteins remain the best characterized of the eight family members (CIS, SOCS1-7), and in particular, we now possess a sound understanding of the mechanism of action for SOCS3. Here, we review the mechanistic role of the SOCS proteins and identify examples where clear, definitive data have been generated and discuss areas where the information is less clear. From this functional viewpoint, we discuss how the SOCS proteins achieve exquisite and specific regulation of cytokine signaling and highlight outstanding questions regarding the function of the less well-studied SOCS family members.

  18. Boosted gain programmable OpAmp with embedded gain monitor for dependable SoCs

    NARCIS (Netherlands)

    Wan, Jinbo; Kerkhoff, Hans G.

    2011-01-01

    SoCs used in safety-critical applications need to be dependable. However in the deep-submicron region, different kinds of aging effects like negative bias temperature instability (NBTI) make the SoCs, especially the analog/mixed-signal parts, undependable. In this paper, a dependability-improved Opa

  19. Predicted soil management and climate change effects on SOC in South Carolina

    Science.gov (United States)

    Extensive use of inversion tillage has contributed to the loss of soil organic carbon (SOC) and degraded soil health in the southeast U.S.A. Our objective was to predict changes in SOC in a Norfolk loamy sand in Florence, SC under several crop rotations (corn (Zea mays L.)-cotton (Gossypium ssp.), C...

  20. Synthesis of highly monodispersed Ga-soc-MOF hollow cubes, colloidosomes and nanocomposites

    KAUST Repository

    Cai, Xuechao

    2016-07-06

    Ga-soc-MOF hollow cubes with an average size of about 300 nm were prepared by a polyvinylpyrrolidone (PVP) assisted acid etching process. Colloidosomes with sizes of around 5-10 mu m composed of single-layer tetrakaidecahedron building blocks (BBs) were synthesized for the first time. Au@Ga-soc-MOF nanocomposites with excellent catalytic properties were obtained.

  1. Sense of coherence and physical health. A "Copenhagen interpretation" of Antonovsky's SOC concept.

    Science.gov (United States)

    Endler, P Christian; Haug, Thomas M; Spranger, Heinz

    2008-04-20

    According to Antonovsky's (Aaron Antonovsky, 1923-1994) sense of coherence (SOC) model, persons with a high SOC have the ability to benefit from their general defense mechanisms in order to overcome stressful situations. In a health-disease continuum, this leads to the development towards health. However, Antonovsky's global hypothesis that the strength of the SOC may influence the physical health status of a person could not be proven. Flensborg-Madsen et al. from Copenhagen were able to provide a new access regarding SOC and health. They investigated the mixture of emotional aspects and mental constructions as a possible cause for fairly low correlation between SOC and physical health. Thus, in an empirical way, they described "emotional coherence" in relation to physical health, while "mental coherence" was linked to psychological health. These authors introduced the idea of applying a shortened version of the original 29-item SOC questionnaire, but have not yet developed or tested the shortened questionnaire. Backed by their important findings, it appears to be promising to consider the use of the SOC questionnaire as standardized by Antonovsky, but cleared of the items regarding "predictability", i.e., Flensborg-Madsen et al. suggested that the items on "predictability" be excluded from the SOC scale when a correlation to physical health is to be investigated. Further investigations in this area of research will be of high impact, not only for health sciences, but also for medical practice.

  2. The 2010 Standard Occupational Classification (SOC): A Classification System Gets an Update

    Science.gov (United States)

    Emmel, Alissa; Cosca, Theresa

    2010-01-01

    Making sense of occupational data isn't always easy. But the task is less daunting when the data are well organized. For Federal occupational statistics, the Standard Occupational Classification (SOC) system establishes that organization. And a recent revision to the SOC means that the data will be current, in addition to being well organized. The…

  3. Synthesis of highly monodispersed Ga-soc-MOF hollow cubes, colloidosomes and nanocomposites.

    Science.gov (United States)

    Cai, Xuechao; Deng, Xiaoran; Xie, Zhongxi; Bao, Shouxin; Shi, Yanshu; Lin, Jun; Pang, Maolin; Eddaoudi, Mohamed

    2016-08-02

    Ga-soc-MOF hollow cubes with an average size of about 300 nm were prepared by a polyvinylpyrrolidone (PVP) assisted acid etching process. Colloidosomes with sizes of around 5-10 μm composed of single-layer tetrakaidecahedron building blocks (BBs) were synthesized for the first time. Au@Ga-soc-MOF nanocomposites with excellent catalytic properties were obtained.

  4. A MGy Radiation-Hardened Sensor Instrumentation SoC in 65nm CMOS Technology

    OpenAIRE

    Verbeeck, Jens; Cao, Ying; Van Uffelen, Marco; Mont Casellas, Laura; Damiani, Carlo; Meek, Richard; Haist, Bernhard; Steyaert, Michiel; Leroux, Paul

    2014-01-01

    A radiation-hardened sensor instrumentation SoC is presented in this paper. The SoC is implemented in a standard 65nm CMOS technology, and achieves MGy-level TID radiation hardness through radiation-hardening-by-design.

  5. Power optimization and performance improvement for embedded Ethernet SOC

    Institute of Scientific and Technical Information of China (English)

    ZHENG Zhao-xia; ZOU Lian-ying; GAO Jun

    2008-01-01

    Information appliance is the combination of traditional home appliances and the internet technology. In this article, an Ethernet controller system-on-chip (SOC) solution for information appliances is presented. To achieve high performance, the embedded 8 bits 8051 micro control unit (MCU) is optimized by an independent instruction bus and a data bus. Besides, a two-stage pipeline feature is added. Compared with the existing 8051 core, the enhanced one-cycle MCU offers ten times improvement in instruction execution efficiency. Mean- while, the performance of media access control (MAC) circuit is greatly improved by adopting various techniques such as direct memory access (DMA) control, paging strategy, etc. To reduce the power consumption, clock gating, low power supply, and multi-working-clock are adopted. Moreover, to achieve rapid data communication in different clock frequency circuits, a simple ping-pong first in first out (FIFO) circuit is realized. The chip is implemented using TSMC 0.25 μm two-poly four-metal mixed signal complementary metal oxide semiconductor (CMOS) technology. Its die area is mm. The test results show that the maximum throughput of Ethernet packets can reach 7 Mb/s while the power consumption is rather low-the working current is just about 200 mA.

  6. ARM Microprocessor-based LCD Touch-screen Interface Design%基于ARM微处理器的液晶触摸屏的接口设计

    Institute of Scientific and Technical Information of China (English)

    梁明亮; 张惠敏; 徐冰

    2011-01-01

    作为人机交互的重要手段,液晶触摸屏使用越来越多,基于微控制器与触摸屏的接口技术在工业控制、智能家电等领域得到应用广泛,开发徼控制器与液晶触摸屏的接口技术是智能电子产品设计的重要工作;介绍了一款液晶触摸屏系统的总体设计方案、电路接口和编程方法;该系统由TFT液晶屏模块,触摸屏和ARM微处理器控制板组成;TFT液晶模块内置SSD1289控制器,尺寸3.2英寸、分辨率240×320像素;触摸屏由触摸传感部件和触摸屏控制器ADS7843组成;控制板采用ARM7徽处理器LPC2148为控制核心;测试和工程实践结果表明,所设计的软、硬件达到了各项要求,并且具有操作方便、稳定性好,性价比高等技术特点,有较好的推广应用价值.%As an important means of human-computer interaction, the LCD touch-screens is widely used. Based on micro-controller and touch screen interface technology in industrial control, intelligent home appliances, are widely used. Development of micro-controller with LCD touch-screen interface technology is an important part of the design work of the intelligent electronic products. Introduced a LCD touch-screen system design program, circuit interfaces, and programming. The system consists of TFT LCD modules, touch-screen and control board of ARM microprocessor. TFT LCD module contains SSD1289 controller, it is 3.2 inch, 240 × 320 pixel resolution; touch screen is composed of the touch sensing components and the ADS7843 touch screen controller; the ARM7 LPC2148 microcontroller is the core of the control board. Testing and engineering practice shows that the design of software and hardware meet the requirements, also has easy operation, good stability, cost-effective higher technical characteristics and has good application value.

  7. Design of Smart Merging Unit Based on FPGA and ARM%基于FPGA与ARM的智能合并单元设计

    Institute of Scientific and Technical Information of China (English)

    朱超; 黄灿; 梅军; 郑建勇

    2011-01-01

    To meet the requirements of smart substations for digital information. integrated functions and compact structure, the definitions of merging unit in IEC 6OO44 -8 and IEC 61850-9-1/2 are analyzed, and on this basis a smart merging unit based on field-programmable gate array (FPGA) and advanced RISC machines (ARM) is designed The auxiliary processor FPGA is responsible for synchronously receiving multi-channel data from different electronic transformers and implementing the parallel operation and switching-over of busbar by integrated Iogical control mechanism software; the main ARM prcessor is responsible for the real-time control of FPGA and sending the sampled data in the form specified in IEC 61850-9-2 by Ethemet, and the pre-configured sampled valne control block is utilized to implement the flexible definition of transmission model for sampled values to avoid the difficulty in implementing the mapping of manufacturing message specification (MMS) Testing results show that the proposed design is feasible and correct.%针对智能变电站信息数字化、功能集成化、结构紧凑化的要求,分析了IEC 60044-8、IEC 61850-9-1/2标准对合并单元的定义,在此基础上设计了一种基于现场可编程门阵列(field-programmable gate array,FPGA)与高级RISC微处理器(advanced RlSC machines,ARM)的智能合并单元.辅处理器FPGA负责多路数据的同步接收,并集成逻辑判别机制软件实现母线的并列运行和切换;主处理器ARM负责FPGA的实时控制并将采样值按IEC 61850-9-2标准通过以太网发送,采用预配置采样值控制块实现采样值传输模型的灵活定义,避免了制造报文规范(manufacturing message specification,MMS)映射的实现困难.试验结果表明了设计方法的可行性和正确性.

  8. Quantification of SOC and Clay Content Using Visible Near-Infrared Reflectance–Mid-Infrared Reflectance Spectroscopy With Jack-Knifing Partial Least Squares Regression

    DEFF Research Database (Denmark)

    Peng, Yi; Knadel, Maria; Gislum, René;

    2014-01-01

    A total of 125 soil samples were collected from a Danish field varying in soil texture from sandy to loamy. Visible near-infrared reflectance (Vis-NIR) and mid-infrared reflectance (MIR) spectroscopy combined with chemometric methods were used to predict soil organic carbon (SOC) and clay contents....... The main objective of this study was to find the best model for predicting SOC and clay content in the sampled field using Vis-NIR, MIR, and the combination of Vis-NIR and MIR and using different model development techniques. The secondary objectives were (i) to use iterations of calculation to find...... the optimal number of replicates for MIR measurements based on the root mean square error of cross validation (RMSECV) and (ii) to apply partial least squares regression in combination with jackknifing (JK) to identify the most important part of spectral variables and the best model for predicting SOC...

  9. A new universal gate for low power SoC applications

    Indian Academy of Sciences (India)

    M Geetha Priya; K Baskaran

    2013-08-01

    This paper formulates a new design technique for an area and energy efficient Universal NAND gate. The proposed robust three transistors (3T) based NAND gate is just as effective for dynamic power control in CMOS VLSI circuits for System on Chip (SoC) applications. The 3T NAND gate is intuitively momentous and lead to better performance measures in terms of dynamic power, reduced area and high speed while maintaining comparable performance than the other available NAND gate logic structures. Simulation tests were performed by employing standard Berkeley Predictive Technology Model (BPTM) 22 nm, 45 nm and 90 nm process technologies. The experiment and simulation results show that, the proposed 3T NAND gate effectively outperforms the basic CMOS NAND gate with excellent driving capability and signal integrity with exact output logic levels.

  10. Verification and Diagnosis Infrastructure of SoC HDL-model

    CERN Document Server

    Hahanov, Vladimir; Litvinova, Eugenia; Chumachenko, Svetlana

    2012-01-01

    This article describes technology for diagnosing SoC HDL-models, based on transactional graph. Diagnosis method is focused to considerable decrease the time of fault detection and memory for storage of diagnosis matrix by means of forming ternary relations in the form of test, monitor, and functional component. The following problems are solved: creation of digital system model in the form of transaction graph and multi-tree of fault detection tables, as well as ternary matrices for activating functional components in tests, relative to the selected set of monitors; development of a method for analyzing the activation matrix to detect the faults with given depth and synthesizing logic functions for subsequent embedded hardware fault diagnosing.

  11. Algorithm & SoC design for automotive vision systems for smart safe driving system

    CERN Document Server

    Shin, Hyunchul

    2014-01-01

    An emerging trend in the automobile industry is its convergence with information technology (IT). Indeed, it has been estimated that almost 90% of new automobile technologies involve IT in some form. Smart driving technologies that improve safety as well as green fuel technologies are quite representative of the convergence between IT and automobiles. The smart driving technologies include three key elements: sensing of driving environments, detection of objects and potential hazards, and the generation of driving control signals including warning signals. Although radar-based systems are primarily used for sensing the driving environments, the camera has gained importance in advanced driver assistance systems(ADAS). This book covers system-on-a-chip (SoC) designs—including both algorithms and hardware—related with image sensing and object detection by using the camera for smart driving systems. It introduces a variety of algorithms such as lens correction, super resolution, image enhancement, and object ...

  12. Mixed-signal methodology guide advanced methodology for AMS IP and SOC design, verification and implementation

    CERN Document Server

    Chen, Jess; Mar, Monte F; Nizic, Mladen; Bailey, Brian

    2012-01-01

    This Book, The Mixed-Signal Methodology Guide: Advanced Methodology For Ams Ip And Soc Design, Verification, And Implementation Provides A Broad Overview Of The Design, Verification And Implementation Methodologies Required For Today's Mixed-Signal Designs. The Book Covers Mixed-Signal Design Trends And Challenges, Abstraction Of Analog Using Behavioral Models, Assertion-Based Metric-Driven Verification Methodology Applied On Analog And Mixed-Signal And Verification Of Low Power Intent In Mixed-Signal Design. It Also Describes Methodology For Physical Implementation In Context Of Concurrent Mixed-Signal Design And For Handling Advanced Node Physical Effects. The Book Contains Many Practical Examples Of Models And Techniques. The Authors Believe It Should Serve As A Reference To Many Analog, Digital And Mixed-Signal Designers, Verification, Physical Implementation Engineers And Managers In Their Pursuit Of Information For A Better Methodology Required To Address The Challenges Of Modern Mixed-Signal Design.

  13. Reconfigurable Multiparameter Biosignal Acquisition SoC for Low Power Wearable Platform.

    Science.gov (United States)

    Kim, Jongpal; Ko, Hyoungho

    2016-11-25

    A low power and low noise reconfigurable analog front-end (AFE) system on a chip (SoC) for biosignal acquisition is presented. The presented AFE can be reconfigured for use in electropotential, bioimpedance, electrochemical, and photoelectrical modes. The advanced healthcare services based on multiparameter physiological biosignals can be easily implemented with these multimodal and highly reconfigurable features of the proposed system. The reconfigurable gain and input referred noise of the core instrumentation amplifier block are 25 dB to 52 dB, and 1 μVRMS, respectively. The power consumption of the analog blocks in one readout channel is less than 52 μW. The reconfigurable capability among various modes of applications including electrocardiogram, blood glucose concentration, respiration, and photoplethysmography are shown experimentally.

  14. An Elastica Arm Scale

    CERN Document Server

    Bosi, F; Corso, F Dal; Bigoni, D

    2015-01-01

    The concept of 'deformable arm scale' (completely different from a traditional rigid arm balance) is theoretically introduced and experimentally validated. The idea is not intuitive, but is the result of nonlinear equilibrium kinematics of rods inducing configurational forces, so that deflection of the arms becomes necessary for the equilibrium, which would be impossible for a rigid system. In particular, the rigid arms of usual scales are replaced by a flexible elastic lamina, free of sliding in a frictionless and inclined sliding sleeve, which can reach a unique equilibrium configuration when two vertical dead loads are applied. Prototypes realized to demonstrate the feasibility of the system show a high accuracy in the measure of load within a certain range of use. It is finally shown that the presented results are strongly related to snaking of confined beams, with implications on locomotion of serpents, plumbing, and smart oil drilling.

  15. Arm CT scan

    Science.gov (United States)

    ... scanners can perform the exam without stopping.) A computer creates separate images of the arm area, called ... M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health ...

  16. Cancer targeting Gene-Viro-Therapy specific for liver cancer by α-fetoprotein-controlled oncolytic adenovirus expression of SOCS3 and IL-24

    Institute of Scientific and Technical Information of China (English)

    Xin Cao; Ruicheng Wei; Xinran Liu; Yan Zeng; Hongling Huang; Miao Ding; Kangjian Zhang; Xin-Yuan Liu

    2011-01-01

    The combination of gene therapy and virotherapy for cancer treatment has received close attention and has become a trend in the field of cancer biotherapy.A strategy called 'Cancer Targeting Gene-Viro-Therapy' (CTGVT) or 'Gene Armed Oncolytic Viral Therapy'(GAOVT) has been proposed,in which an antitumor gene is inserted into an oncolytic viral vector.In our previous study,a dual-regulated oncolytic adenovirus with enhanced safety for normal cells and strict liver cancertargeting ability,designated Ad·enAFP· E1A· E1 B (A55)(briefly Ad·enAFP·D55),was successfully constructed. In the current work,interleukin-24 (IL-24) and suppressor of cytokine signaling 3 (SOCS3) genes were packaged into Ad·enAFP·D55.The new constructs,Ad·enAFP·D55-(IL-24) and Ad·enAFP·D55-(SOCS3),showed improved tumoricidal activity in hepatoma cell lines compared with the oncolytic viral vector Ad·enAFP·D55.The coadministrationofAd · enAFP· D55-(IL-24)and Ad·enAFP·D55-(SOCS3) showed much better antitumor effect than Ad·enAFP·D55-(IL-24) or Ad·enAFP·D55-(SOCS3) alone both in vitro and in a nude mouse xenograft model.Moreover,our results also showed that blockade of the Jak/Stat3 pathway by Ad·enAFP·D55-(SOCS3) infection in HuH-7 cells could down-regulate some anti-apoptosis proteins,such as XIAP,Bcl-xL,and survivin,whichmightsensitizethecellsto Ad·enAFP·D55-(IL-24)-induced apoptosis.These results indicate that co-administration of Ad·enAFP·D55-(IL-24) and Ad·enAFP·D55-(SOCS3) may serve as a candidate therapeutic approach for the treatment of liver cancer.

  17. Neurochemostat: A Neural Interface SoC With Integrated Chemometrics for Closed-Loop Regulation of Brain Dopamine.

    Science.gov (United States)

    Bozorgzadeh, Bardia; Schuweiler, Douglas R; Bobak, Martin J; Garris, Paul A; Mohseni, Pedram

    2016-06-01

    This paper presents a 3.3×3.2 mm(2) system-on-chip (SoC) fabricated in AMS 0.35 μm 2P/4M CMOS for closed-loop regulation of brain dopamine. The SoC uniquely integrates neurochemical sensing, on-the-fly chemometrics, and feedback-controlled electrical stimulation to realize a "neurochemostat" by maintaining brain levels of electrically evoked dopamine between two user-set thresholds. The SoC incorporates a 90 μW, custom-designed, digital signal processing (DSP) unit for real-time processing of neurochemical data obtained by 400 V/s fast-scan cyclic voltammetry (FSCV) with a carbon-fiber microelectrode (CFM). Specifically, the DSP unit executes a chemometrics algorithm based upon principal component regression (PCR) to resolve in real time electrically evoked brain dopamine levels from pH change and CFM background-current drift, two common interferents encountered using FSCV with a CFM in vivo. Further, the DSP unit directly links the chemically resolved dopamine levels to the activation of the electrical microstimulator in on-off-keying (OOK) fashion. Measured results from benchtop testing, flow injection analysis (FIA), and biological experiments with an anesthetized rat are presented.

  18. Worldwide Report, Arms Control

    Science.gov (United States)

    2007-11-02

    world war, a nuclear inferno , for over 40 years. A sober assessment of the situation in world politics was conducted at the meet- ing of the...there is success in stopping the arms race, or those forces accelerating the arms race and driving humanity to the edge of a nuclear inferno will gain...dialogue with all forces fighting against a nuclear inferno , affirmed by the Warsaw Pact countries, is being seen more and more as the only practicable

  19. The DOE ARM Aerial Facility

    Energy Technology Data Exchange (ETDEWEB)

    Schmid, Beat; Tomlinson, Jason M.; Hubbe, John M.; Comstock, Jennifer M.; Mei, Fan; Chand, Duli; Pekour, Mikhail S.; Kluzek, Celine D.; Andrews, Elisabeth; Biraud, S.; McFarquhar, Greg

    2014-05-01

    The Department of Energy Atmospheric Radiation Measurement (ARM) Program is a climate research user facility operating stationary ground sites that provide long-term measurements of climate relevant properties, mobile ground- and ship-based facilities to conduct shorter field campaigns (6-12 months), and the ARM Aerial Facility (AAF). The airborne observations acquired by the AAF enhance the surface-based ARM measurements by providing high-resolution in-situ measurements for process understanding, retrieval-algorithm development, and model evaluation that are not possible using ground- or satellite-based techniques. Several ARM aerial efforts were consolidated into the AAF in 2006. With the exception of a small aircraft used for routine measurements of aerosols and carbon cycle gases, AAF at the time had no dedicated aircraft and only a small number of instruments at its disposal. In this "virtual hangar" mode, AAF successfully carried out several missions contracting with organizations and investigators who provided their research aircraft and instrumentation. In 2009, AAF started managing operations of the Battelle-owned Gulfstream I (G-1) large twin-turboprop research aircraft. Furthermore, the American Recovery and Reinvestment Act of 2009 provided funding for the procurement of over twenty new instruments to be used aboard the G-1 and other AAF virtual-hangar aircraft. AAF now executes missions in the virtual- and real-hangar mode producing freely available datasets for studying aerosol, cloud, and radiative processes in the atmosphere. AAF is also engaged in the maturation and testing of newly developed airborne sensors to help foster the next generation of airborne instruments.

  20. STAT3-mediated constitutive expression of SOCS-3 in cutaneous T-cell lymphoma

    DEFF Research Database (Denmark)

    Brender, C; Nielsen, M; Kaltoft, K;

    2001-01-01

    A characteristic feature of neoplastic transformation is the loss of external control by cytokines and extracellular matrix of cellular differentiation, migration, and mitogenesis. Because suppressors of cytokine signaling (SOCS) proteins are negative regulators of cytokine-induced signaling......, it has been hypothesized that an aberrant SOCS expression plays a role in neoplastic transformation. This study reports on a constitutive SOCS-3 expression in cutaneous T-cell lymphoma (CTCL) cell lines. SOCS-3 protein is constitutively expressed in tumor cell lines (but not in nonmalignant T cells......) obtained from affected skin from a patient with mycosis fungoides (MF) and from peripheral blood from a patient with Sezary syndrome (SS). In contrast, constitutive SOCS-3 expression is not found in the leukemic Jurkat T-cell line, the MOLT-4 acute lymphoblastic leukemia cell line, and the monocytic...

  1. Hello to Arms

    Science.gov (United States)

    2005-01-01

    This image highlights the hidden spiral arms (blue) that were discovered around the nearby galaxy NGC 4625 by the ultraviolet eyes of NASA's Galaxy Evolution Explorer. The image is composed of ultraviolet and visible-light data, from the Galaxy Evolution Explorer and the California Institute of Technology's Digitized Sky Survey, respectively. Near-ultraviolet light is colored green; far-ultraviolet light is colored blue; and optical light is colored red. As the image demonstrates, the lengthy spiral arms are nearly invisible when viewed in optical light while bright in ultraviolet. This is because they are bustling with hot, newborn stars that radiate primarily ultraviolet light. The youthful arms are also very long, stretching out to a distance four times the size of the galaxy's core. They are part of the largest ultraviolet galactic disk discovered so far. Located 31 million light-years away in the constellation Canes Venatici, NGC 4625 is the closest galaxy ever seen with such a young halo of arms. It is slightly smaller than our Milky Way, both in size and mass. However, the fact that this galaxy's disk is forming stars very actively suggests that it might evolve into a more massive and mature galaxy resembling our own. The armless companion galaxy seen below NGC 4625 is called NGC 4618. Astronomers do not know why it lacks arms but speculate that it may have triggered the development of arms in NGC 4625.

  2. Automatic 3D motion estimation of left ventricle from C-arm rotational angiocardiography using a prior motion model and learning based boundary detector.

    Science.gov (United States)

    Chen, Mingqing; Zheng, Yefeng; Wang, Yang; Mueller, Kerstin; Lauritsch, Guenter

    2013-01-01

    Compared to pre-operative imaging modalities, it is more convenient to estimate the current cardiac physiological status from C-arm angiocardiography since C-arm is a widely used intra-operative imaging modality to guide many cardiac interventions. The 3D shape and motion of the left ventricle (LV) estimated from rotational angiocardiography provide important cardiac function measurements, e.g., ejection fraction and myocardium motion dyssynchrony. However, automatic estimation of the 3D LV motion is difficult since all anatomical structures overlap on the 2D X-ray projections and the nearby confounding strong image boundaries (e.g., pericardium) often cause ambiguities to LV endocardium boundary detection. In this paper, a new framework is proposed to overcome the aforementioned difficulties: (1) A new learning-based boundary detector is developed by training a boosting boundary classifier combined with the principal component analysis of a local image patch; (2) The prior LV motion model is learned from a set of dynamic cardiac computed tomography (CT) sequences to provide a good initial estimate of the 3D LV shape of different cardiac phases; (3) The 3D motion trajectory is learned for each mesh point; (4) All these components are integrated into a multi-surface graph optimization method to extract the globally coherent motion. The method is tested on seven patient scans, showing significant improvement on the ambiguous boundary cases with a detection accuracy of 2.87 +/- 1.00 mm on LV endocardium boundary delineation in the 2D projections.

  3. 基于ARM平台的无线网状网的构建%The Design of Wireless Mesh Network Based on ARM

    Institute of Scientific and Technical Information of China (English)

    高振强

    2011-01-01

    As a new type of wireless network technology, Wireless Mesh Networks has been commonly approved by the academic circles and industry, and has gradually became the basic networking technology of the next generation of wireless networks.The general embedded platform-ARM which is famous for its low power consumption and high-speed data processing ability is more and more popular in the Telecommunications. After discussed the origin, definition, structure and characteristics of the wireless mesh networks, this paper designed the wireless mesh network nodes cotains hardware and software which is based on ARM platforms-s3c2440 and routers.%无线网状网作为一种新型的网络技术已经得到学术界和业界普遍关注和认可,也逐渐成为实现新一代互联网无线宽带接入层的基本网络技术.ARM平台作为通用式的嵌入式平台,其低功耗和高速的数据处理能力越来越受到无线通信领域的青睐.本文在论述了无线网状网的起源、定义、结构和特点的基础上,基于s3c2440的ARM平台设计了无线网状网的网络节点和路由器的硬件平台,并在ARM平台上实现了无线网状网协议,构建了无线网状网节点.

  4. 基于BP和ARM的发动机声音识别系统%Voice recognition engine based on BP's system in realization of ARM

    Institute of Scientific and Technical Information of China (English)

    姜愉

    2012-01-01

    Aimed at addressing automatic fee charging of highway toll stations and large-scale re- chargeable parking lots, this paper introduces the design of a embedded speech recognition system based on ARM9 and embedded Linux system of the engine sound by analyzing the BP neural network recognition theory. The design consisting of S3C2410 microprocessors and Linux operating systems involves trans- planting the C language of speech recognition program to the embedded Linux operating system's file system when cross-compiled. The paper describes the system s hardware and software framework, and offers the experiments results produced by real-time recognition of the car type by the engine sound. The results prove its accuracy, real-time and validity.%为解决高速公路收费站及大型停车收费场自动收费问题,依据BP神经网络识别理论,设计了一个基于ARM9及嵌入式Linux系统的发动机声音识别系统。选用S3C2410微处理器和嵌入式Linux操作系统,把交叉编译后的发动机声音识别C语言程序移植到操作系统的文件中,实现了发动机声音实时识别功能,给出了系统整体软硬件结构框架以及实时输入发动机声音判别汽车类型的识别结果。现场实验证实了该系统的准确性、实时性和有效性。

  5. 基于ARM的家居远程视频监控平台%Household Remote Video Monitoring Platform Based on ARM

    Institute of Scientific and Technical Information of China (English)

    何少佳; 史剑清

    2014-01-01

    A household remote video monitoring platform is designed and basis of embedded and WIFI wireless network. This system chooses S3C6410 microprocessor which based on ARM11 cores as the kernel controler regards USB camera as capture terminal, captures video with application function which provided by Video4Linux2, encodes and decodes the video by T264 software, and transfers the video data and control instruction rely on RTP/RTCP protocol and TCP protocol through WIFI wireless network. The experimental results show that this platform makes video image smooth, and it can well meet the demand of household wireless video monitoring application. At the same time, this platform has simple structure, low cost, and easy to promote.%设计了一种基于嵌入式和WIFI无线网络的家用远程视频监控平台。本系统采用基于ARM11内核的S3C6410微处理器作为控制器核心, USB摄像头作为采集端,利用Video4Linux2(V4L2)提供的应用函数等完成视频采集,使用T264软件进行编码解码,采用WIFI无线网络,依靠RTP/ RTCP协议和TCP协议实现视频数据和控制指令的远程传输。实验结果表明,本平台监控视频画面流畅,能很好的满足家居无线视频监控的应用需求。同时本平台结构简单、造价低廉、易于推广。

  6. Design of a Compliant Robotic Arm Based on Series Elastic Actuator%一种基于串联弹性驱动器的柔顺机械臂设计

    Institute of Scientific and Technical Information of China (English)

    张秀丽; 谷小旭; 赵洪福; 王昆

    2016-01-01

    A compliant robotic arm with passive compliant mechanical structure and active compliant control, SoftArm II, is designed to cope with the dynamically-changing work environments and uncertain human-robot interactions. Series elastic actuators (SEA) are introduced between joint motors and links as transmission module, which is composed of linear springs evenly arranged circumferentially. Firstly, the kinematic model, dynamic model and system stiffness model are set up for the compliant 3DOF robotic arm. Then, SEA spring stiffness can be determined using weighted average joint stiffness at several representative poses in the workspace based on the system stiffness model. Position PID (proportional-integral-derivative) control is employed in the robotic arm, while contact forces at the arm’s end-point and joint torques are monitored to modify the planned trajectory adaptively. Experiments of the circle trajectory tracking in free workspace, human and the robot pushing along a straight line, and collision imitating, are carried out using the compliant robotic arm SoftArm II. The results show that SoftArm II reaches a good position tracking accuracy in free workspace, compliant interaction between the robotic arm and human is achieved, and collision of the robotic arm is safely avoided. The results indicate that the SEA-based passive compliant mechanical structure and the control approach based on end force and joint torque monitoring have the potential to meet the compliance and safety requirements of a robotic arm used in human-robot coexistence environment.%为了应对工作环境的动态变化以及人机交互的不确定性,设计了基于被动柔顺结构和主动柔顺控制的柔顺机械臂SoftArm II.在关节电机和连杆之间加入串联弹性驱动器(SEA)传动模块,SEA传动模块由线弹簧周向均布构成;建立了3DOF柔顺机械臂的运动学/动力学模型以及系统刚度模型,基于系统刚度模型提出工作空

  7. The Prognostic Role of SOCS3 and A20 in Human Cholangiocarcinoma.

    Directory of Open Access Journals (Sweden)

    Yimin Wang

    Full Text Available As an antagonist of the JAK/STAT pathway, suppressor of cytokine signaling 3 (SOCS3 plays an integral role in shaping the inflammatory environment, tumorigenesis and disease progression in cholangiocarcinoma (CCA; however, its prognostic significance remains unclear. Although tumor necrosis factor α-induced protein 3 (TNFAIP3, also known as A20 can decrease SOCS3 expression and is involved in the regulation of tumorigenesis in certain malignancies, its role in CCA remains unknown. In this study, we investigated the expression of SOCS3 and A20 in human CCA tissues to assess the prognostic significance of these proteins. The expression of SOCS3 and A20 was initially detected by western blot in 22 cases of freshly frozen CCA tumors with corresponding peritumoral tissues and 22 control normal bile duct tissues. Then, these proteins were investigated in 86 CCA patients by immunohistochemistry (IHC and were evaluated for their association with clinicopathological parameters in human CCA. The results indicated that SOCS3 expression was significantly lower in CCA tumor tissues than in corresponding peritumoral biliary tissues and normal bile duct tissues. Conversely, A20 was overexpressed in CCA tissues. Thus, an inverse correlation between the expression of SOCS3 and A20 was discovered. Furthermore, patients with low SOCS3 expression or high A20 expression showed a dramatically lower overall survival rate. These proteins were both associated with CCA lymph node metastasis, postoperative recurrence and overall survival rate. However, only A20 showed a significant association with the tumor node metastasis (TNM stage, while SOCS3 showed a significant association with tumor differentiation. Multivariate Cox analysis revealed that SOCS3 and A20 were independent prognostic indicators for overall survival in CCA. Thus, our study demonstrated that SOCS3 and A20 represent novel prognostic factors for human CCA.

  8. Arménie

    Directory of Open Access Journals (Sweden)

    François Verdier

    2012-04-01

    Full Text Available L’Arménie est une petite république du Caucase, à la limite sud–est de l’Europe, qui a gagné son autonomie en 1990 après l’ouverture du bloc soviétique. Le nouveau Ministère du Patrimoine a sollicité la coopération de la France pour mettre en place une nouvelle politique culturelle. Tout d’abord, une évaluation sur place de la situation dans les domaines des monuments historiques, de l’archéologie et de l’Inventaire a permis d’envisager les réponses à proposer. Pour la demande d’informatisation des dossiers d’inventaire déjà réalisés sous l’autorité de l’Académie de Saint–Petersbourg, nous avons proposé de former des chercheurs arméniens aux méthodes et techniques de l’Inventaire général. L’accueil d’une stagiaire pendant trois mois au service régional de l’Inventaire de Haute–Normandie a été suivi par la mise en place d’un équipement informatique à Yérévan, puis par l’accueil et la formation de techniciens informaticiens et photographes arméniens. De retour dans leur pays ils ont commencé à remettre en place un service d’inventaire dont le programme comprend la création d’une base de données patrimoniales, le recensement de la ville de Yérévan, la numérisation d’images pour la publication d’un indicateur du patrimoine et la préparation de dossiers de protection au titre du patrimoine mondial.The Armenian heritage comprises both archaeological remains of towns destroyed by never–ending wars and a number of old churches from the eleventh and twelfth centuries. Yerevan, the capital of Armenia, was founded three thousand years ago and is one of Europe’s oldest capitals. From 1925 it has developed according to an ambitious urban planning project. After the major political upheavals of 1991, a special ministry was created to look after the architectural and movable heritage of the country and to promote the Armenian national identity. A mission in Yerevan was

  9. Control circuit for air-jet loom solenoid valve based on ARM7%基于ARM7的喷气织机电磁阀控制电路

    Institute of Scientific and Technical Information of China (English)

    郭张军; 吴震宇; 刘凤臣

    2012-01-01

    In order to complete the real-time control of air-jet loom high frequency solenoid valve, and to promote the fault detection ability of solenoid valve when they work, a control system of high speed driving and current detecting feedback of solenoid valve with ARM7 was designed. ARM7 process chip LPC2478 was used as microcontroller, then an output line expansion circuit was designed with complex programmable logic device( CPLD) on the basis of microprocessor date/address bus. A high speed driving circuit was designed by the high, low voltage composite technology with the characteristic of air-jet loom solenoid valve. Current detecting part was added for judging the working performance of solenoid valve. The test results show that the system has stable operation, high efficiency. The production quality and efficiency of air-jet loom are improved by the research of current detecting feedback data.%为完成喷气织机高频电磁阀的实时控制,提升对电磁阀工作时的故障检测能力,设计了基于ARM7的电磁阀高速驱动和电流检测反馈控制系统.以ARM7处理器的芯片LPC2478为微控制器,并在数据、地址总线基础上,通过采用复杂可编程逻辑器件(CPLD)扩展了输出口线;针对喷气织机电磁阀高频特性,设计了高、低压复合的驱动控制电路;为判断电磁阀工作性能的优劣,增加了电流检测环节.试验结果表明,该系统运行稳定、高效,通过对电流检测反馈数据的分析,提高了喷气织机生产的质量和效率.

  10. SYNTHESES AND OPTOELECTRONIC PROPERTIES OF A HEXA-ARMED FLUORENE-BENZENE COPOLYMER BASED ON 2,4,6,8,10,12-HEXABENZYL 2,4,6,8,10,12-HEXAAZAISOWURTZITANECAGED-CORE

    Institute of Scientific and Technical Information of China (English)

    Qian-jin Zhao; Wen-hui Wu; Qiao-li Niu; Jun-biao Peng; Yiu-wing Mai

    2009-01-01

    A novel kind of hexa-armed fluorene-benzene copolymer based on a hexaazaisowurtzitane core was synthesized through Suzuki coupling polycondensation.The introduction of this bulky caged-core could not only enhance the photoluminescence quantum efficiency,but also improve the electroluminescence properties,especially suppress the common green-color emission of polyfluorenes(PFs)material during device operation.These features can be attributed to the successful suppression of PF's chain aggregation which profits from the introduction of the bulky hexaazaisowurtzitane core and the design of multi-armed architecture.

  11. Construction and Application of Embedded Image Processing System Based on ARM920T%基于ARM920T的嵌入式图像处理平台搭建及应用

    Institute of Scientific and Technical Information of China (English)

    姚宇乐; 陈强; 张九卫; 徐晨峰

    2016-01-01

    The article research on a method that corss compiling OpenCV and Qt on Linux OS and porting it to Linux operating system. It builds up an Embedded Image Processing System with ARM920T which is a core that can achieve complicated image processing. This platform makes classic algorithm barcode recognition come true. The article describes barcode position recognition and algorithm. The experimental result verifies the availability of the method in this article.%研究了在Linux OS上交叉编译OpenCV和Qt后将其移植到嵌入式Linux操作系统的方法。搭建了以ARM920T 为核心的嵌入式图像处理平台,能够实现复杂图像算法的处理。在此平台上实现了基于经典算法的条形码识别功能。描述了条形码定位和识别过程及算法。实验结果验证了本文方法的有效性。

  12. Research on BACnet Building Controller Based on ARM9 and Embedded Linux%基于ARM9和嵌入式Linux的BACnet楼宇控制器的研究

    Institute of Scientific and Technical Information of China (English)

    黄健仓

    2012-01-01

    Application of BACnet/IP technology building controller, building control center via high-speed Ethernet connections in different floors, the application of different functional controller. In hardware, from the cost, performance and other aspects identified ARM9 hardware platform, according to the system need to design the various functional modules of hardware circuit; in software, embedded Linux system by transplantation, the controller provides a stable operating environment software and network environment. This paper focuses on the completion of the use of C language realization BACnet protocol stack, through the protocol stack, the controller with other BACnet devices for data exchange functions, proposes the application methods of controller in practical projects.%应用BACnet/IP技术的楼宇控制器,楼宇控制中心通过以太网高速连接位于不同楼层、不同功能的应用控制器.通过ARM9的硬件平台设计出硬件的各个功能模块电路,通过移植嵌入式Linux系统,为控制器提供了软件的稳定运行环境、网络环境.重点完成了BACnet协议栈,通过协议栈,控制器与其他BACnet设备进行数据交换.提出了控制器在具体工程中的应用方法.

  13. 基于ARM7TDMI的嵌入式系统BootLoader的设计与实现%The Design and Realization of BootLoader Based on Imbedded System of ARM7TDMI

    Institute of Scientific and Technical Information of China (English)

    汪金宝; 陶玉贵; 陈付龙

    2011-01-01

    After the ARM7TDMI core board is designed, the USB interface expanded and increased, and BootLoader principle analyzed, detailed analysis and sophisticated design in a series of key technologies such as the start mode, interrupt handling, hardware initialization, booting linux kernel, etc eventually lead to a BoatLoader that supports the U-disk-loading embedded linux system image. By comparing the experimental results of the analysis, the BootLoader will better meet the requirements of users and developers.%通过设计ARM7TDMI核心板,扩展和增加USB接口,分析BootLoader原理,以及在启动模式、中断处理、硬件初始化和最终引导linux内核上的一系列关键技术,最终实现了一个支持从U盘加载嵌入式linux系统镜像的BootLoader,通过对实验结果的分析,该BootLoader能更好地满足用户和开发人员的要求.

  14. Design of smart home gateway based on ARM platform%基于ARM平台的智能家居网关设计

    Institute of Scientific and Technical Information of China (English)

    唐新忠; 李海忠; 马明明; 秦丽杰

    2016-01-01

    The advantages and disadvantages of various transmission mediums for smart home network are introduced in this paper. A time sharing delivery protocol based on power line transmission is designed. Based on the protocol,a design scheme of the smart home gateway based on ARM platform is proposed. According to the system design requirements,the cir⁃cuit design of wireless WiFi,power transmission,Ethernet modules and the process design of the corresponding gateway soft⁃ware are conducted. The system debugging result shows that the circuit is simple,and its design is rational and practical.%介绍智能家居网络各种传输介质的优缺点,设计一种基于电力线传输的简化分时发送协议。在此协议基础上,提出一种基于ARM平台的智能家居网关设计方案。根据系统设计的要求,进行无线WiFi、电力传输、以太网等模块的电路设计和相应的网关软件流程设计。最后,通过系统调试证明该系统电路简单、设计合理且实用性强。

  15. Sense of coherence and physical health. A cross-sectional study using a new scale (SOC II).

    Science.gov (United States)

    Flensborg-Madsen, Trine; Ventegodt, Søren; Merrick, Joav

    2006-10-09

    In this study, we constructed a new sense of coherence scale (SOC II), where we eliminated the notion of predictability (that life is meant to be predictable), which was present in the original SOC scale developed by Aaron Antonovsky (1923-1994) (SOC-29 and SOC-13). Our hypothesis was that SOC II would show a higher degree of association with physical health than the original SOC scale. In order to test this idea, we used a cross-sectional study including 4,648 Danes and used the three different health measures: self-evaluated physical health, physical symptoms, and self-evaluated psychological health. We found that SOC II was positively associated with all three health measures with the correlation coefficients 0.338, 0.282, and 0.578, respectively. Furthermore, we found dose response tendencies for all three health measures across groups of SOC, since health improved with a higher SOC. By means of regression analysis, we found that SOC was significantly associated with all three health measures after stratifying for demographic variables, life style variables, life form variables, and attitude variables, respectively. We conclude from this study that the SOC II scale we developed seems better associated with physical health than found with the original SOC scale. We also postulate that the concept of predictability was irrelevant, or even disturbing, and should not be included in the SOC scale.

  16. A four-armed Schiff base: 6,6′,6′′,6′′′-tetramethoxy-2,2′,2′′,2′′′-[methanetetrayltetrakis(methylenenitrilomethylidyne]tetraphenol

    Directory of Open Access Journals (Sweden)

    Guang-Qi Jiang

    2008-08-01

    Full Text Available In the structure of the title compound, C37H40N4O8, pentaerythrityltetramine is bonded to four o-vanillin molecules, forming a four-armed Schiff base molecule. These molecules are connected by intermolecular C—H...O hydrogen bonds. Intramolecular C—H...N and O—H...N hydrogen bonds are also present.

  17. Stress coping ability in nursing students: studies on the influence factor of Sense of Coherence (SOC).

    Science.gov (United States)

    Okumura, Ryusaku; Suzuki, Tamami; Bai, Yoshiko; Mukawa, Kazuma

    2012-07-01

    The researchers conducted an investigation on factors influencing stress coping ability, referred to as a Sense of Coherence (SOC). 278 students in the 2nd to 4th year of "A" University nursing program were subjected to this survey, and the response rate was 75.5%. The average SOC value was 39.5 +/- 6.6 for males, and 37.4 +/- 7.0 for females. The value for age group 20 to 24 years old was 37.1 +/- 6.8. The average SOC value obtained through this survey was higher than the survey results of the Kanto region and lower than the national results. When a comparison was made between "the group with higher average SOC" and "the group with lower average SOC" among the entire survey average SOC, especially significant differences were discovered in the following items. "Prospects for the future is bright", "Difficult experiences have meaning", "I have good relationship with friends", "I feel stressed", and "I was seriously ill" (P SOC.

  18. Suppressor of cytokine signaling (SOCS genes are silenced by DNA hypermethylation and histone deacetylation and regulate response to radiotherapy in cervical cancer cells.

    Directory of Open Access Journals (Sweden)

    Moon-Hong Kim

    Full Text Available Suppressor of cytokine signaling (SOCS family is an important negative regulator of cytokine signaling and deregulation of SOCS has been involved in many types of cancer. All cervical cancer cell lines tested showed lower expression of SOCS1, SOCS3, and SOCS5 than normal tissue or cell lines. The immunohistochemistry result for SOCS proteins in human cervical tissue also confirmed that normal tissue expressed higher level of SOCS proteins than neighboring tumor. Similar to the regulation of SOCS in other types of cancer, DNA methylation contributed to SOCS1 downregulation in CaSki, ME-180, and HeLa cells. However, the expression of SOCS3 or SOCS5 was not recovered by the inhibition of DNA methylation. Histone deacetylation may be another regulatory mechanism involved in SOCS1 and SOCS3 expression, however, SOCS5 expression was neither affected by DNA methylation nor histone deacetylation. Ectopic expression of SOCS1 or SOCS3 conferred radioresistance to HeLa cells, which implied SOCS signaling regulates the response to radiation in cervical cancer. In this study, we have shown that SOCS expression repressed by, in part, epigenetically and altered SOCS1 and SOCS3 expression could contribute to the radiosensitive phenotype in cervical cancer.

  19. Arm To Arm Interface Using Embedded C

    Directory of Open Access Journals (Sweden)

    Mohanraj.C

    2013-02-01

    Full Text Available Embedded systems are the most emerging field in these recent years. In this paper a different number of ARM processors (LPC2148 and LPC2378 are interconnected using C for distributed services. N numbers of processors are connected as the network and each processing devices are interlinked with each other, so that the each data that is processed by the devices and it can be used by the other device to activate their entire process. All the processed data’s are communicated to other device through Xbee interface card. LPC2148 and LPC2378 ARM processors are used in this prototype and winXtalk is used as a software terminal window. In this paper, the ultimate benefits of multiple processor interactions related to the embedded applications and design issues of processor interconnection are discussed. The features of multiple processor interaction in inter process communication and executions of embedded multitasking are also discussed. In modern embedded computing platform, embedded processor used in various applications like home automation, industrial control, medical system, access control, etc. In this paper, using embedded processor interactions, the several data communication is established.

  20. Wrapper/TAM Co-Optimization and Test Scheduling for SOCs Using Rectangle Bin Packing Considering Diagonal Length of Rectangles

    CERN Document Server

    Islam, Md Rafiqul; Mahmud, Abdullah Al; Islam, Md Saiful; Babu, Hafiz Md Hasan

    2010-01-01

    This paper describes an integrated framework for SOC test automation. This framework is based on a new approach for Wrapper/TAM co-optimization based on rectangle packing considering the diagonal length of the rectangles to emphasize on both TAM widths required by a core and its corresponding testing time. In this paper, we propose an efficient algorithm to construct wrappers that reduce testing time for cores. We then use rectangle packing to develop an integrated scheduling algorithm that incorporates power constraints in the test schedule. The test power consumption is important to consider since exceeding the system's power limit might damage the system.

  1. A Global Obstacle-avoidance Map for Anthropomorphic Arms

    Directory of Open Access Journals (Sweden)

    Cheng Fang

    2014-07-01

    Full Text Available More and more humanoid robots are used in human society, and they face a wide variety of complicated manipulation tasks, which are mainly to be achieved by their anthropomorphic arms. Obstacle avoidance for the anthropomorphic arm must be a fundamental consideration to guarantee the successful implementation of these tasks. Different from traditional methods searching for feasible or optimal collision-free solutions for the anthropomorphic arm, a global obstacle- avoidance map for the whole arm is proposed to indicate the complete set of feasible solutions. In this map, the motion of the arm can be appropriately planned to intuitively control the configuration of the arm in motion. First, the cubic spline function is adopted to interpolate some well-chosen path points to generate a smooth collision-free path for the wrist of the anthropomorphic arm. Second, based on the path function of the wrist, the time and the self-rotation angle of the arm about the “shoulder-wrist” axis are used to parameterize all possible configurations of the arm so that a global two- dimensional map considering the obstacle avoidance can be established. Subsequently, a collision-free self-rotation angle profile of the arm can be well planned. Finally, the joint trajectories of a specific anthropomorphic arm, which correspond to the planned path of the wrist and self-rotation angle profile of the arm, can be solved on the basis of the general kinematic analysis of the anthropomorphic arm, and the specific structure. Several simulations are conducted to verify that the proposed collision-free motion planning method for anthropomorphic arms has some advantages and can be regarded as a convenient and intuitive tool to control the configuration of the anthropomorphic arm in motion, without collision with obstacles in its surroundings.

  2. The adaptor protein soc-1/Gab1 modifies growth factor receptor output in Caenorhabditis elegans.

    Science.gov (United States)

    Hopper, Neil A

    2006-05-01

    Previous genetic analysis has shown that dos/soc-1/Gab1 functions positively in receptor tyrosine kinase (RTK)-stimulated Ras/Map kinase signaling through the recruitment of csw/ptp-2/Shp2. Using sensitized assays in Caenorhabditis elegans for let-23/Egfr and daf-2/InsR (insulin receptor-like) signaling, it is shown that soc-1/Gab1 inhibits phospholipase C-gamma (PLCgamma) and phosphatidylinositol 3'-kinase (PI3K)-mediated signaling. Furthermore, as well as stimulating Ras/Map kinase signaling, soc-1/Gab1 stimulates a poorly defined signaling pathway that represses class 2 daf-2 phenotypes. In addition, it is shown that SOC-1 binds the C-terminal SH3 domain of SEM-5. This binding is likely to be functional as the sem-5(n2195)G201R mutation, which disrupts SOC-1 binding, behaves in a qualitatively similar manner to a soc-1 null allele in all assays for let-23/Egfr and daf-2/InsR signaling that were examined. Further genetic analysis suggests that ptp-2/Shp2 mediates the negative function of soc-1/Gab1 in PI3K-mediated signaling, as well as the positive function in Ras/Map kinase signaling. Other effectors of soc-1/Gab1 are likely to inhibit PLCgamma-mediated signaling and stimulate the poorly defined signaling pathway that represses class 2 daf-2 phenotypes. Thus, the recruitment of soc-1/Gab1, and its effectors, into the RTK-signaling complex modifies the cellular response by enhancing Ras/Map kinase signaling while inhibiting PI3K and PLCgamma-mediated signaling.

  3. Design of a novel 3-DOF hybrid mechanical arm

    Institute of Scientific and Technical Information of China (English)

    LI YanBiao; JIN ZhenLin; JI ShiMing

    2009-01-01

    Parameter optimization for a novel 3-DOF hybrid mechanical arm was presented by using a statistics method called the statistics parameters optimization method based on index atlases.Several kinematics and mechanics performance evaluation indices were proposed and discussed,according to the kinematics and mechanics analyses of the mechanical arm.Considering the assembly technique,a prototype of the 3-DOF hybrid mechanical arm was developed,which provided a basis for applications of the 3-DOF hybrid mechanical arm.The novel 3-DOF hybrid mechanical arm can be applied to the modern industrial fields requiring high stiffness,lower inertia and good technological efficiency.A novel 6-DOF hybrid humanoid mechanical arm was built,in which the present mechanical arm was connected with a spherical 3-DOF parallel manipulator.

  4. Design of Wireless Ultrasonic Anemometer Based on ARM and CPLD%基于ARM和CP LD的无线风速仪设计∗

    Institute of Scientific and Technical Information of China (English)

    陆健; 张自嘉

    2014-01-01

    分析了在平面三角形阵列中利用超声波时差法测量风速风向的基本原理,设计了基于ARM和CPLD微处理器的无线风速仪。给出了以LPC1768和EPM240T100C5芯片为核心的超声波无线风速仪的设计实现方法。重点阐述了超声波驱动电路、信号调理电路、无线收发模块以及系统软件的设计。实验结果表明,该系统可以精确测量风速与风向,且工作可靠稳定。%The principle of measurement of wind speed and direction using ultrasonic Time-of-Flight was introduced in the triangle array. The design of ultrasonic anemometer based on ARM and CPLD was described. The method of ultrasonic anemometer based on LPC1768 and EPM240T100C5 was given. The driving circuit,signal conditioning circuit,wireless transceiver module and the software design were introduced. The experiments testify the system can accurately measure wind speed and direction. It also has other advantages such as good reliability.

  5. Program Design and Application of Ethernet Communication Based on ARM%基于ARM的以太网通信程序的设计与实现

    Institute of Scientific and Technical Information of China (English)

    吴婷婷; 孙旭; 谢兴红; 侯富强; 张稳

    2012-01-01

    Communication is the basic way to transport and share information between different systems.Ethernet is the basic and common Protocol Standards in the local network.Through the different transport media,Ethernet can realize the communication and connection between different devices.The paper is based on system hardware,focuses on the software design of communication interface,and develops the communication program based on the ARM Development Board.This application can send data which created by sensor to the client.%通信是各个系统进行数据交换,资源共享的基本方法。以太网是当今现有局域网采用的最通用的通信协议标准,它可以通过不同的传输媒体,实现各设备间的数据交换。文章在系统硬件基础上,着重研究了通信接口的软件设计,并编写了基于ARM开发板的通信程序。该程序能将传感器采集的数据传输至客户机。

  6. Dynamic and Stability of Harmonic Driving Flexible Cartesian Robotic Arm with Bolted Joints Based on the Sensitivity and Multiple Scales Method

    Directory of Open Access Journals (Sweden)

    Yufei Liu

    2015-01-01

    Full Text Available Flexible Cartesian robotic arms (CRAs are typical multicoupling systems. Considering the elastic effects of bolted joints and the motion disturbances, this paper investigates the dynamic and stability of the flexible CRA. With the kinetic energy and potential energy of the comprising components, Hamilton’s variational principle and Duhamel integral are utilized to derive the dynamic equation and vibration differential equation. Based on the proposed elastic restraint model of the bolted joints, boundary conditions and mode equations of the flexible CRA are determined with using the principle of virtual work. According to the mode frequencies and sensitivities analysis, it reveals that the connecting stiffness of the bolted joints has significant influences, and the mode frequencies are more sensitive to the tensional stiffness. Moreover, describing the motion displacement of the driving base as combination of an average motion displacement and a harmonic disturbance, the vibration responses of the system are studied. The result indicates that the motion disturbance has obvious influence on the vibration responses, and the influence enhances under larger accelerating operations. The multiple scales method is introduced to analyze the parametric stability of the system, as well as the influences of the tensional stiffness and the end-effector on the stability.

  7. 基于ARM的智能家居控制系统设计%Design of smart home control system based on ARM

    Institute of Scientific and Technical Information of China (English)

    杨晓迪; 廖昕; 古丽米拉·克孜尔别克; 孙中华

    2015-01-01

    针对传统智能家居采用有线组建布线繁琐,增减设备需要重新布线,影响美观,且系统中的家电需要依靠家庭内部的PC,升级和维护均不方便。在此将ZigBee无线通信技术及嵌入式ARM技术结合在一起,利用Qt技术通过触摸屏进行人机交互,设计了一种既能利用PC机又能利用手持终端对家居进行控制的智能家居控制系统。以现有嵌入式ARM微处理器的开发和控制水平,开展基于ZigBee的网点部署的研究,以无线网实施家居电器的控制和管理。测试表明,该系统具有良好的实用性、可靠性和可扩展性。%Since the cumbersome wired formation is used in traditional smart home,rewiring is needed when equipment changes,its appearance is affected,the appliances in the system rely on the PC in the house,and upgrades and maintenance are not convenient. Therefore,a smart home control system controlled by PC or hand⁃held terminal was designed by combining the ZigBee wireless communication technology with the embedded ARM technology and Qt technology for human⁃computer in⁃teraction via the touch screen. Based on developing level and control ability of existing embedded ARM microprocessor,the re⁃search on network deployment based on ZigBee was carried out. The control and management of household electrical appliances are implemented through wireless network. Test results show that the system has good practicability,reliability and scalability.

  8. Mobile 3D Graphics SoC From Algorithm to Chip

    CERN Document Server

    Woo, Jeong-Ho; Nam, Byeong-Gyu

    2010-01-01

    The first book to explain the principals behind mobile 3D hardware implementation, helping readers understand advanced algorithms, produce low-cost, low-power SoCs, or become familiar with embedded systems. As mobile broadcasting and entertainment applications evolve, there is increasing interest in 3D graphics within the field of mobile electronics, particularly for handheld devices. In Mobile 3D Graphics SoC , Yoo provides a comprehensive understanding of the algorithms of mobile 3D graphics and their real chip implementation methods. 3D graphics SoC (System on a Chip) architecture and its i

  9. High Accuracy Temperature Control System in Cliniea Chemistry Analyzer Based on ARM9%基于ARM9的高精度生化分析仪温度控制系统设计

    Institute of Scientific and Technical Information of China (English)

    刘克平; 曹书权; 李岩

    2008-01-01

    全自动生化分析仪开发研制中的一个重要组成部分是温控系统的设计,被检样品和试剂只有在指定的温度下检测才能保证生化检验结果的可靠性.设计了一种基于ARM9处理器的温控系统,结合嵌入式Linux操作系统,实现模糊自整定PID控制算法,具有控制精度高,响应快,稳定性、实时性好等优点.

  10. Microwave assisted one-pot synthesis of novel molecular clefts with only one chiral arm based on deoxycholic acid

    Institute of Scientific and Technical Information of China (English)

    Bi Tao Zeng; Zhi Gang Zhao; Xing Li Liu; Yun Shi

    2008-01-01

    A rapid, safe, and efficient method for the synthesis of novel molecular clefts based" on deoxycholic acid was reported. Sevennew molecular clefts have been synthesized in good yields (89-98%). This method proved to be extremely simple and highlyefficient. The structures of these receptors were confirmed by 1H NMR, IR, MS spectra and elemental analysis.

  11. Fiducial marker-based correction for involuntary motion in weight-bearing C-arm CT scanning of knees. II. Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Jang-Hwan [Department of Radiology, Stanford University, Stanford, California 94305 and Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States); Maier, Andreas; Keil, Andreas; McWalter, Emily J.; Gold, Garry E.; Fahrig, Rebecca [Department of Radiology, Stanford University, Stanford, California 94305 (United States); Pal, Saikat [Biomedical Engineering Department, California Polytechnic State University, San Luis Obispo, California 93407 (United States); Beaupré, Gary S. [Musculoskeletal Research Laboratory, VA Palo Alto Health Care System, Palo Alto, California 94304 (United States)

    2014-06-15

    Purpose: A C-arm CT system has been shown to be capable of scanning a single cadaver leg under loaded conditions by virtue of its highly flexible acquisition trajectories. In Part I of this study, using the 4D XCAT-based numerical simulation, the authors predicted that the involuntary motion in the lower body of subjects in weight-bearing positions would seriously degrade image quality and the authors suggested three motion compensation methods by which the reconstructions could be corrected to provide diagnostic image quality. Here, the authors demonstrate that a flat-panel angiography system is appropriate for scanning both legs of subjectsin vivo under weight-bearing conditions and further evaluate the three motion-correction algorithms using in vivo data. Methods: The geometry of a C-arm CT system for a horizontal scan trajectory was calibrated using the PDS-2 phantom. The authors acquired images of two healthy volunteers while lying supine on a table, standing, and squatting at several knee flexion angles. In order to identify the involuntary motion of the lower body, nine 1-mm-diameter tantalum fiducial markers were attached around the knee. The static mean marker position in 3D, a reference for motion compensation, was estimated by back-projecting detected markers in multiple projections using calibrated projection matrices and identifying the intersection points in 3D of the back-projected rays. Motion was corrected using three different methods (described in detail previously): (1) 2D projection shifting, (2) 2D deformable projection warping, and (3) 3D rigid body warping. For quantitative image quality analysis, SSIM indices for the three methods were compared using the supine data as a ground truth. Results: A 2D Euclidean distance-based metric of subjects’ motion ranged from 0.85 mm (±0.49 mm) to 3.82 mm (±2.91 mm) (corresponding to 2.76 to 12.41 pixels) resulting in severe motion artifacts in 3D reconstructions. Shifting in 2D, 2D warping, and 3D

  12. Portable and Smart Ultrasonic Fluid Level Meter Based on ARM Cortex- M3%基于ARM Cortex - M3便携式智能超声波液位计

    Institute of Scientific and Technical Information of China (English)

    张根宝; 李秀平; 庞苏娟

    2012-01-01

    为了准确测量环境恶劣工业生产中的液位以保证生产效率,通过研究超声波测距工作原理,采用新型高性能、低功耗和低成本的ARM - Cortex M3内核微控制器,结合超声波技术、红外传输与DS1820温度补偿修正设计了一款便携式智能超声波液位计.其采用的先进微处理器以及无线传输的方式,简化了硬件电路,优化了软件编程.研究表明:该液位计设计提高了液位测量精度、实时性、灵活性与快速性.%To measure fluid level in poor industrial production conditions accurately for ensuring production efficiency,a portable intelligent correction ultrasonic fluid level meter was designed by studying the working principle of ultrasonic distance measurement. New high-performance, low power and low-cost ARM-Cortex M3 microcontroller core, combined with ultrasonic technology, infrared transmission and DS1820 temperature compensation were used in the level meter. The use of advanced microprocessor and wireless transmission, simplified hardware and optimized software programming. Studies show that the design of this fluid level gauge improved accuracy,timeliness,flexibility and rapidity of the level measurement.

  13. Design of the Electric Power Load Management System Based on ARM9%基于ARM9的电力负控终端系统的设计

    Institute of Scientific and Technical Information of China (English)

    马晓莉; 南权

    2011-01-01

    介绍了采用高端嵌入式单片机ARM9和嵌入式Linux操作系统构成的电力负荷终端系统,以及该系统的整体设计方案。终端利用嵌入式Linux操作系统为应用软件提供强大、稳定的资源环境,根据Q/GDW 374.1-2009《电力用户用电信息采集系统技术规范:专变采集终端技术规范》的要求,将智能电网管理终端多个任务划分为应用软件下执行任务多个线程,使得系统完成多任务的能力更强、稳定性更高%This paper introduces the Electric Power Load Management Terminals system which adopt the operating systems of ARM9 and Linux and the design of the system.The Electric Power Load Management Terminals have strong and steady application software depending on the Linux system.By the technique criterion Q/GDW 374.1-2009,the tasks of the smart electric network management terminals are resolved into several threads of the executive tasks under application softwares,thus improving the capability and stability with which the system implements multi-tasks

  14. Growth hormone preferentially induces the rapid, transient expression of SOCS-3, a novel inhibitor of cytokine receptor signaling

    DEFF Research Database (Denmark)

    Adams, T E; Hansen, J A; Starr, R;

    1998-01-01

    Four members (SOCS-1, SOCS-2, SOCS-3, and CIS) of a family of cytokine-inducible, negative regulators of cytokine receptor signaling have recently been identified. To address whether any of these genes are induced in response to growth hormone (GH), serum-starved 3T3-F442A fibroblasts were...

  15. SOCS2 deletion protects against hepatic steatosis but worsens insulin resistance in high-fat-diet-fed mice

    DEFF Research Database (Denmark)

    Zadjali, Fahad; Santana-Farre, Ruyman; Vesterlund, Mattias

    2012-01-01

    in the development of diet-induced hepatic steatosis and insulin resistance. SOCS2-knockout (SOCS2(-/-)) mice and wild-type littermates were fed for 4 mo with control or high-fat diet, followed by assessment of insulin sensitivity, hepatic lipid content, and expression of inflammatory cytokines. SOCS2(-/-) mice...

  16. Biological evidence that SOCS-2 can act either as an enhancer or suppressor of growth hormone signaling

    DEFF Research Database (Denmark)

    Greenhalgh, Christopher J; Metcalf, Donald; Thaus, Anne L

    2002-01-01

    Suppressor of cytokine signaling (SOCS)-2 is a member of a family of intracellular proteins implicated in the negative regulation of cytokine signaling. The generation of SOCS-2-deficient mice, which grow to one and a half times the size of their wild-type littermates, suggests that SOCS-2 may at...

  17. Manipulability measure of dual-arm space robot and its application to design an optimal configuration

    Science.gov (United States)

    Zhang, Bo; Liang, Bin; Wang, Xueqian; Li, Gang; Chen, Zhang; Zhu, Xiaojun

    2016-11-01

    Coupling effect exists among different arms and the base in a multi-arm space robot. The manipulability measure of one arm can be affected by the base and the other arms, which has important effects on the configuration optimization, the singularity avoidance and the compliant control. The manipulability measure for a multi-arm space robot is more complex than that of a single-arm space robot. At present, the manipulability measure of a multi-arm space robot has not been studied. In the paper, a new concept of manipulability measure is applied to analyze the manipulability measure for a dual-arm space robot, especially for the manipulability measure of the mission arm subjecting to the influence from coupling effect of auxiliary arm and the base. Based on the manipulability measure of mission arm, a performance index is introduced and used to design and choose an optimization configuration for a dual-arm space robot. Finally, a plane dual-arm space robot is simulated, which is illustrated the influence of joint angles and the base attitude on mission arm's manipulability measure. Simulation results show that the proposed manipulability measure is useful for a multi-arm space robot and optimal configuration can be extended and applied to the coordinated soft rendezvous and docking and the target capture in the field of on-orbit servicing.

  18. Characterization of an Ac transposon system based on apt1-m1 (Ac) on the long arm of maize chromosome 9.

    Science.gov (United States)

    Wang, Fei; Li, Pengfei; Tang, Yuanping; Fan, Jun; Xu, Dabin; Guo, Shengming; Xu, Zhengkai; Song, Rentao

    2012-09-01

    Activator/Dissociation (Ac/Ds) transposable elements have been used in maize insertional mutagenesis as a complement to Mutator (Mu). In this study, to further improve the efficiency of the Ac/Ds mutagenesis system, we adopted apt1-m1 (Ac) on the long arm of chromosome 9 (9L) as a donor Ac to create an Ac insertion library. This system is based on the negative selection pressure against the donor Ac, and it was highly efficient for isolating new transposition events. We obtained 9,625 transposition events from 1083 F1 ears with an average transposition rate of 8.66 % (rates ranged from 1.11 to 29.73 %). We also adopted a modified PCR-based genome walking strategy to improve the efficiency of the new method for isolating transposon-flanking sequences. This method is more efficient than the Southern-based method that was used in previous studies. A validation step was developed to distinguish transposon tags derived from newly transposed Ac or Ds elements. Using this PCR-based method, we isolated 67 inheritable flanking sequences from the apt1-m1 (Ac) transposition library; of these, 51 were confirmed as tr-Ac-flanking sequences and 11 were tr-Ds-flanking sequences. Similar to other Ac donors from different loci, the apt1-m1 (Ac) system also exhibited a preference for short distance transposition. In this study, we have further improved the Ac mutagenesis system in maize for gene isolation and functional genomics studies.

  19. Effects of Reducing Suppressors of Cytokine Signaling-3 (SOCS3 Expression on Dendritic Outgrowth and Demyelination after Spinal Cord Injury.

    Directory of Open Access Journals (Sweden)

    Keun Woo Park

    Full Text Available Suppressors of cytokine signaling-3 (SOCS3 is associated with limitations of nerve growth capacity after injury to the central nervous system. Although genetic manipulations of SOCS3 can enhance axonal regeneration after optic injury, the role of SOCS3 in dendritic outgrowth after spinal cord injury (SCI is still unclear. The present study investigated the endogenous expression of SOCS3 and its role in regulating neurite outgrowth in vitro. Interleukin-6 (IL-6 induces SOCS3 expression at the mRNA and protein levels in neuroscreen-1 (NS-1 cells. In parallel to SOCS3 expression, IL-6 induced tyrosine phosphorylation of signal transducer and activator of transcription 3 (STAT3 in NS-1 cells. Lentiviral delivery of short hairpin RNA (shSOCS3 (Lenti-shSOCS3 to decrease SOCS3 expression into NS-1 cells enhanced IL-6-induced tyrosine phosphorylation of STAT3 (P-STAT3 Tyr705 and promoted neurite outgrowth. In addition, we determined if reduction of SOCS3 expression by microinjection of Lenti-shSOCS3 into spinal cord enhances dendrite outgrowth in spinal cord neurons after SCI. Knocking down of SOCS3 in spinal cord neurons with Lenti-shSOCS3 increased complete SCI-induced P-STAT3 Tyr705. Immunohistochemical analysis showed that complete SCI induced a significant reduction of microtubule association protein 2-positive (MAP-2+ dendrites in the gray and white matter at 1 and 4 weeks after injury. The SCI-induced reduction of MAP-2+ dendrites was inhibited by infection with Lenti-shSOCS3 in areas both rostral and caudal to the lesion at 1 and 4 weeks after complete SCI. Furthermore, shSOCS3 treatment enhanced up-regulation of growth associated protein-43 (GAP-43 expression, which co-localized with MAP-2+ dendrites in white matter and with MAP-2+ cell bodies in gray matter, indicating Lenti-shSOCS3 may induce dendritic regeneration after SCI. Moreover, we demonstrated that Lenti-shSOCS3 decreased SCI-induced demyelination in white matter of spinal cord both

  20. Dual Functional Nanocarrier for Cellular Imaging and Drug Delivery in Cancer Cells Based on π-Conjugated Core and Biodegradable Polymer Arms.

    Science.gov (United States)

    Kulkarni, Bhagyashree; Surnar, Bapurao; Jayakannan, Manickam

    2016-03-14

    Multipurpose polymer nanoscaffolds for cellular imaging and delivery of anticancer drug are urgently required for the cancer therapy. The present investigation reports a new polymer drug delivery concept based on biodegradable polycaprolactone (PCL) and highly luminescent π-conjugated fluorophore as dual functional nanocarrier for cellular imaging and delivery vehicles for anticancer drug to cancer cells. To accomplish this goal, a new substituted caprolactone monomer was designed, and it was subjected to ring opening polymerization using a blue luminescent bishydroxyloligo-phenylenevinylene (OPV) fluorophore as an initiator. A series of A-B-A triblock copolymer building blocks with a fixed OPV π-core and variable chain biodegradable PCL arm length were tailor-made. These triblocks self-assembled in organic solvents to produce well-defined helical nanofibers, whereas in water they produced spherical nanoparticles (size ∼150 nm) with blue luminescence. The hydrophobic pocket of the polymer nanoparticle was found to be an efficient host for loading water insoluble anticancer drug such as doxorubicin (DOX). The photophysical studies revealed that there was no cross-talking between the OPV and DOX chromophores, and their optical purity was retained in the nanoparticle assembly for cellular imaging. In vitro studies revealed that the biodegradable PCL arm was susceptible to enzymatic cleavage at the intracellular lysosomal esterase under physiological conditions to release the loaded drugs. The nascent nanoparticles were found to be nontoxic to cancer cells, whereas the DOX-loaded nanoparticles accomplished more than 80% killing in HeLa cells. Confocal microscopic analysis confirmed the cell penetrating ability of the blue luminescent polymer nanoparticles and their accumulation preferably in the cytoplasm. The DOX loaded red luminescent polymer nanoparticles were also taken up by the cells, and the drug was found to be accumulated at the perinuclear environment

  1. 基于ARM-Linux的便携式红外测油仪的设计%Design on Portable Infrared Oil Content Analyzer Based on ARM-Linux

    Institute of Scientific and Technical Information of China (English)

    邵志鹏; 王双保; 李学青

    2015-01-01

    Due to traditional oil content instrumentation is in-large volume and also requires host computer ,a portable infrared oil content analyzer based on ARM-Linux was developed in this paper.S3C2440 was used as the main controller.The LCD was used as display that depends on MiniGui graphical user interface in an open-source Linux system.By the LCD touch screen,it can control the whole instrument,such as collection,storage and display.The system consists of light source,spectrum module,signal acquisition module,A/D converter module and the ARM control module.In order to improve the detection precision and signal an-ti-interference ability,lock-in amplifier technology was used in signal modulation modules.The new equipment is small ,highly sta-ble,and has high repeatability and high repeatability.It is in line with national standards and is very hopeful in application.%针对传统油类分析检测仪器体积大,需要上位机进行协作的特点,研制了基于ARM-Linux的便携式红外测油仪。该仪器采用S3C2440为主控器,在嵌入式Linux系统下开发了MiniGUI图形用户界面,通过液晶触摸屏来实现对仪器的控制、采集、存储和显示。该系统的硬件由光源、分光模块、信号调制采集模块,A/D转换模块和ARM控制处理模块组成。为了提高信号的精度和采集的抗干扰能力,信号调制模块采用了锁相放大技术,从而获得了较好的检测结果。设计的仪器体积小、稳定性高、重复性好、操作简单、符合国家标准,具有较好的推广价值。

  2. Solar Automatic Tracking Double Fuzzy Control System Based on ARM%基于ARM的太阳自动跟踪双模糊控制系统

    Institute of Scientific and Technical Information of China (English)

    刘景艳; 李玉东; 杨晓邦

    2012-01-01

    针对太阳自动跟踪系统采用常规的PID控制器存在着跟踪精度低,超调量大等缺点,提出了一种基于ARM的太阳自动跟踪双模糊控制系统的设计方案;以32位ARM嵌入式微处理器为核心,采用光电跟踪和太阳运动轨迹跟踪相结合的混合跟踪模式;在光电跟踪模式下.采用模糊控制;在太阳运动轨迹跟踪模式下,采用模糊PID分段式控制,并依据光强的大小自动切换控制器;采用两个同样规格的太阳能电池板,分别采用固定安装和太阳自动跟踪系统测试太阳能电池板的采光强度;实验结果表明,该系统具有较高的跟踪精度,实现了对太阳全天候的跟踪,有效地提高了光电转换效率.%The solar automatic tracking system adopting the conventional PID controller has low tracking precision and big overshoot. The solar automatic tracking double fuzzy control system based on ARM is put forward. Embedded microcontroller 32-bit ARM processor is the core. A kind of mixed tracking mode is adopted, and it combines photoelectric tracking mode and solar trajectory tracking mode. The double fuzzy control method is presented, the fuzzy control method is adopted in photoelectric tracking mode, and in solar trajectory tracking mode, the fuzzy PID segmented tracking control method is put forward. And the controller can be automatically switched control mode according to light intensity. The fixed installation and the automatic tracking system are respectively used to test the solar panels daylighting strength. The experimental results show that the solar automatic tracking system is possessed of high tracking precision, realizes the sun round-the-clock tracking and effectively improves the photoelectric conversion efficiency.

  3. Efficiency enhancement of perovskite solar cells via incorporation of phenylethenyl side arms into indolocarbazole-based hole transporting materials

    Science.gov (United States)

    Petrikyte, Ieva; Zimmermann, Iwan; Rakstys, Kasparas; Daskeviciene, Maryte; Malinauskas, Tadas; Jankauskas, Vygintas; Getautis, Vytautas; Nazeeruddin, Mohammad Khaja

    2016-04-01

    Small-molecule hole transporting materials based on an indolocarbazole core were synthesized and incorporated into perovskite solar cells, which displayed a power conversion efficiency up to 15.24%. The investigated hole transporting materials were synthesized in three steps from commercially available and relatively inexpensive starting materials without using expensive catalysts. Various electro-optical measurements (UV-vis, CV, hole mobility, DSC, TGA, ionization potential) have been carried out to characterize the new hole transporting materials.Small-molecule hole transporting materials based on an indolocarbazole core were synthesized and incorporated into perovskite solar cells, which displayed a power conversion efficiency up to 15.24%. The investigated hole transporting materials were synthesized in three steps from commercially available and relatively inexpensive starting materials without using expensive catalysts. Various electro-optical measurements (UV-vis, CV, hole mobility, DSC, TGA, ionization potential) have been carried out to characterize the new hole transporting materials. Electronic supplementary information (ESI) available: Synthesis procedures, device construction and characterisation details. See DOI: 10.1039/c6nr01275b

  4. SNPase-ARMS qPCR: Ultrasensitive Mutation-Based Detection of Cell-Free Tumor DNA in Melanoma Patients.

    Directory of Open Access Journals (Sweden)

    Julia Stadler

    Full Text Available Cell-free circulating tumor DNA in the plasma of cancer patients has become a common point of interest as indicator of therapy options and treatment response in clinical cancer research. Especially patient- and tumor-specific single nucleotide variants that accurately distinguish tumor DNA from wild type DNA are promising targets. The reliable detection and quantification of these single-base DNA variants is technically challenging. Currently, a variety of techniques is applied, with no apparent "gold standard". Here we present a novel qPCR protocol that meets the conditions of extreme sensitivity and specificity that are required for detection and quantification of tumor DNA. By consecutive application of two polymerases, one of them designed for extreme base-specificity, the method reaches unprecedented sensitivity and specificity. Three qPCR assays were tested with spike-in experiments, specific for point mutations BRAF V600E, PTEN T167A and NRAS Q61L of melanoma cell lines. It was possible to detect down to one copy of tumor DNA per reaction (Poisson distribution, at a background of up to 200 000 wild type DNAs. To prove its clinical applicability, the method was successfully tested on a small cohort of BRAF V600E positive melanoma patients.

  5. The Geometry of the Galaxy's Spiral Arms

    Science.gov (United States)

    Steiman-Cameron, Thomas Y.; Wolfire, M.; Hollenbach, D.

    2008-05-01

    We present a new model for the spiral structure of the Milky Way based upon an analysis of the essentially all-sky spectral data obtained by the Far Infrared Absolute Spectrophotometer (FIRAS) instrument of the Cosmic Background Explorer (COBE) satellite. The model provides the volume emissivities of the [C II] 128 µm and [N II] 205 µm lines, as a function of position within the Galaxy. These lines are important coolants of the interstellar medium and strong tracers of the spiral structure. Despite decades of work, there is still no full agreement on the number of spiral arms in the Milky Way, much less the details of their geometry. Motivated, in part, by this fact, we conducted a systematic search for 2-arm, 3-arm, and 4-arm models that maximize agreement with the COBE data. We find that only a four-arm model, with arms defined by logarithmic spiral forms and pitch angles ranging from 13.5 to 15.6 degrees, is consistent with the observations. The arms are neither evenly spaced nor identical in form. The resultant volume emissivity models for C+ and N+, when convolved with the FIRAS beam and integrated over the Galaxy, reproduce the COBE [C II] 128 µm and [N II] 205 µm intensity maps extremely well. We also examine all models for the Galaxy's spiral structure that have been proposed over the past half century in the context of the same COBE observations. A significant fraction of these models, including many recent ones, appear to be incompatible with the data. However, several four-arm models from the literature are consistent with the COBE observations.

  6. Design of control for household cleaning robot based on ARM%基于arm的家用清洁机器人的控制系统设计

    Institute of Scientific and Technical Information of China (English)

    张强; 陈奕梅

    2014-01-01

    文章提出了一种基于ARM处理器的家用清洁机器人控制系统,包括硬件设计和软件设计。硬件部分包括主控器模块、电源及欠压检测模、传感器模块、人机交互模块、驱动模块以及清洁模块。软件部分设计了清洁机器人的主要控制流程。该控制系统以通用性和功能完备为目标,使机器人具备智能清洁能力。%This paper presents a kind of control system of home cleaning robot based on ARM processor which includes hardware and software design. The hardware part includes main controller module, power supply with undervoltage detection module, sensor module, human-computer interaction module, driving module and cleaning module. The software part designs the staple control procedure of cleaning robot. This control system aims at universal and integrated functions which ensure the robot have the ability to clean intelligently.

  7. 基于ARM的防火墙系统设计与实现%Design and Implementation of Embedded Firewall based on ARM

    Institute of Scientific and Technical Information of China (English)

    袁峰; 赵杰; 陈靖; 乐德广

    2013-01-01

    Based on ARM hardware architecture, we build the embedded development platform through the porting of Linux kernel. Besides, we extend and optimize the Linux kernel modules, and implement frewall system with the packet fltering, content fltering and protocol fltering as a whole. The tests show that system has the perfect functions with the features of small scale and low cost.%  文章基于ARM处理器的硬件构架,通过移植Linux内核建立嵌入式开发平台,针对Linux内核模块进行功能扩展和优化,并实现了集包过滤、内容过滤和协议过滤功能为一体的防火墙系统。测试分析结果显示该系统不但具有完善的功能,而且具有体积小、成本低的特点。

  8. Design and Implementation of an Uninterruptible Power Supply Based on ARM%基于ARM的井下不间断电源的设计与实现

    Institute of Scientific and Technical Information of China (English)

    史延东; 薛鹏; 宁飞

    2013-01-01

    Design and implementation of uninterruptible power supply based on ARM microprocessor STM32F100 is presented. A flyback power supply and automatic switching circuit are designed. A chip power management system as the core CN3705 chip and FS361A of chip are developed. Using a variety of protective measure, the software flow chart of the system is given. Experi-mental tests showed that the system is stable. It can automatically switch when the power is cutting.%提出了以STM32F100为微处理器的井下矿用不间断电源的设计方案,设计了单端反激式供电电源和自动切换电路,制定了以CN3705芯片和FS361A芯片为核心的电源管理系统,采用了多种保护措施,给出了系统程序软件流程图.实验测试表明,系统工作稳定,在掉电时,可以实现自动切换.

  9. 基于ARM和GSM的家电远程控制系统设计%Based on the ARM and GSM appliances remote control system design

    Institute of Scientific and Technical Information of China (English)

    宋威; 孙运强; 黄进; 尹航; 庞志远

    2013-01-01

    This paper designs a device. It utilizes S3C2440 ARM microprocessor as core, combining with an embedded Linux operating system, sending and receiving AT commands that connect with the serial GSM module TC35i ,it can communicate GSM network with mobile phone SMS, thus, it enable the control from phone to home appliances remote. This paper describes the hardware structure of the system, and embedded Linux system migration and application development process, it has been successful y applied in the intel igent home control system based on the GSM network.%  本文设计了一种以ARM微处理器S3C2440为核心,结合嵌入式Linux操作系统,向与串口连接的GSM模块TC35i发送接收AT指令,通过GSM网络与手机进行短信通信,从而实现了手机对家电的远程控制。文中描述了系统的硬件构成,嵌入式Linux系统移植及应用程序的开发流程,已成功应用在基于GSM网络的智能家居控制系统中。

  10. Syntheses, structural variations and fluorescence studies of two dinuclear zinc(II) complexes of a Schiff base ligand with an extended carboxylate side arm

    Science.gov (United States)

    Shit, Shyamapada; Sasmal, Ashok; Dhal, Piu; Rizzoli, Corrado; Mitra, Samiran

    2016-03-01

    A potentially tetradentate Schiff base ligand containing carboxylic acid group, HL, (E)-2-((pyridin-2-yl)methyleneamino)-5-chlorobenzoic acid is synthesized and characterized. Reaction of HL with hydrated zinc(II) trichloroacetate and zinc(II) trifluoroacetate under similar reaction condition yields two discrete dinuclear complexes, [Zn(L)(Cl)]2 (1) and [Zn(L)(CF3COO)]2 (2) and characterized by different physicochemical methods. Single crystal X-ray structural characterization reveals different ligating properties of the coordinated anionic ligand (L-) in its zinc(II) complexes. The side arm carboxylate of L- shows μ1,3-carboxylato-bridging mode in 1 and connects zinc(II) atoms in syn-anti fashion while it exhibits a μ1,1-carboxylato-bridging mode in 2. The metal ions display distorted square pyramidal geometries in both the structures and associated with different degrees of distortions. The fluorescence spectra of HL and its zinc(II) complexes recorded in methanol at room temperature which reveal the enhancement of emission intensity for the complexes compared to that of the free ligand. Thermogravimetric analyses (TGA) reveal high thermal stabilities of the complexes.

  11. Insulin resistance, adipokine profile and hepatic expression of SOCS-3 gene in chronic hepatitis C

    OpenAIRE

    Wójcik, Kamila; Jabłonowska, Elżbieta; Omulecka, Aleksandra; Piekarska, Anna

    2014-01-01

    AIM: To analyze adipokine concentrations, insulin resistance and hepatic expression of suppressor of cytokine signaling 3 (SOCS-3) in patients with chronic hepatitis C genotype 1 with normal body weight, glucose and lipid profile.

  12. Deletion of skeletal muscle SOCS3 prevents insulin resistance in obesity

    DEFF Research Database (Denmark)

    Beck Jørgensen, Sebastian; O'Neill, Hayley M; Sylow, Lykke

    2013-01-01

    Obesity is associated with chronic low-grade inflammation that contributes to defects in energy metabolism and insulin resistance. Suppressor of cytokine signaling (SOCS)-3 expression is increased in skeletal muscle of obese humans. SOCS3 inhibits leptin signaling in the hypothalamus and insulin...... of hyperinsulinemia and insulin resistance because of enhanced skeletal muscle insulin receptor substrate 1 (IRS1) and Akt phosphorylation that resulted in increased skeletal muscle glucose uptake. These data indicate that skeletal muscle SOCS3 does not play a critical role in regulating muscle development or energy...... expenditure, but it is an important contributing factor for inhibiting insulin sensitivity in obesity. Therapies aimed at inhibiting SOCS3 in skeletal muscle may be effective in reversing obesity-related glucose intolerance and insulin resistance....

  13. JPRS Report, Arms Control

    Science.gov (United States)

    2007-11-02

    34military activities, whether in the armed forces, their civilian sectors, or in the ’defence’ indus- try". In another paper Professor Carl Sagan ...spurring the development of new weapons. Star Wars is a case in point. As Carl Sagan puts it, the idea is doomed: "SDI is ruinously expensive, it can

  14. Worldwide Report, Arms Control.

    Science.gov (United States)

    1985-08-12

    thai, in the long run one cannot oven tell to willy frandi’and fgon fahr . ’r’ho Soviets arc thus evoking the suspicion that they are playing dirty...material resources and the knowledge of scientists in combatting diseases , if the resources were spent on it that are taken up by the arms race

  15. JPRS Report, Arms Control.

    Science.gov (United States)

    2007-11-02

    Joint-Stock Company"] [Text] A constituent conference of the "Ural- Kosmos " closed joint-stock company [aktsionernoye obshchestvo zakrytogo tipa] has...due to be destroyed under arms cuts. Their warheads will be replaced by communications satellites. The founders of the "Ural- Kosmos " company note

  16. Worldwide Report, Arms Control

    Science.gov (United States)

    2007-11-02

    Soviet Laser Expert (N. G. Bazov Interview; CAMBIO 16, 11-18 Feb 85) 86 Unnamed General Urges French ’Star Wars’ Effort (Hoplites; LE MONDE, 6...1024 85 JPRS-TAC-85-002 1 April 1985 SPACE ARMS SPANISH MAGAZINE CITES SOVIET LASER EXPERT PM211619 [Editorial Report] Madrid CAMBIO 16 in Spanish

  17. Worldwide Report, Arms Control

    Science.gov (United States)

    1985-12-31

    Bonn RHEINISCHER MERKUR /CHRIST UND WELT, 12 Oct 85) . 14 GDR Commentary on Geneva Talks (Various sources,various dates) 19 Military...USSR GENEVA TALKS FRG DEFENSE UNDERSECRETARY SUPPORTS U.S. VIEW ON ARMS CONTROL Bonn RHEINISCHER MERKUR /CHRIST UND WELT in German 12 Oct 85 p 3

  18. Worldwide Report, Arms Control

    Science.gov (United States)

    2007-11-02

    like tired runners exposed to the sights of millions of viewers. The fear of oxygen starvation was handled by the U.S. President on several levels...and to present the U.S. attitudes as the only way out of the maze of the arms race. It is an attempt to push through the old principles of U.S

  19. Reducing substance involvement in college students: a three-arm parallel-group randomized controlled trial of a computer-based intervention.

    Science.gov (United States)

    Christoff, Adriana de Oliveira; Boerngen-Lacerda, Roseli

    2015-06-01

    The prevalence of alcohol and other drug use is high among college students. Reducing their consumption will likely be beneficial for society as a whole. Computer and web-based interventions are promising for providing behaviorally based information. The present study compared the efficacy of three interventions (computerized screening and motivational intervention [ASSIST/MBIc], non-computerized screening and motivational intervention [ASSIST/MBIi], and screening only [control]) in college students in Curitiba, Brazil. A convenience sample of 458 students scored moderate and high risk on the ASSIST. They were then randomized into the three arms of the randomized controlled trial (ASSIST/MBIc, ASSIST/MBIi [interview], and assessment-only [control]) and assessed at baseline and 3 months later. The ASSIST involvement scores decreased at follow-up compared with baseline in the three groups, suggesting that any intervention is better than no intervention. For alcohol, the specific involvement scores decreased to a low level of risk in the three groups and the MBIc group showed a positive outcome compared with control, and the scores for each question were reduced in the two intervention groups compared to baseline. For tobacco, involvement scores decreased in the three groups, but they maintained moderate risk. For marijuana, a small positive effect was observed in the ASSIST/MBIi and control groups. The ASSIST/MBIc may be a good alternative to interview interventions because it is easy to administer, students frequently use such computer-based technologies, and individually tailored content can be delivered in the absence of a counselor.

  20. 基于ARM的综合信息处理系统设计%Design of a integrative information management system based on ARM

    Institute of Scientific and Technical Information of China (English)

    王海峰

    2011-01-01

    Based on the testing requirement of the integrative controlling system, a design of a integrative information management system is put forward in this paper, this system can realize the whole controlling of the integrative controlling system, the hardware part based on the high-powered ARM chip LPC2378FBD144, communicative by 1533 BUS between every module, in the software part, the VC++ is adopted , based on the MFC library to compile the software, the graphical interfaces is achieved, the data file and the user program can be upload or download, the whole system can obtain all the functions such as reset, start-up, communication, software debugging and unit testing, all parts is all-purpose and extensible.%基于综合控制系统的测试需求,提出一种综合信息处理系统设计,可以实现对于综合控制系统的综合控制.硬件部分以高性能的ARM芯片LPC2378FBD144为核心.通过1553B总线对各功能模板及设备进行信息综合与统一管理,软件部分采用Visual C++6.0编写,使用MFC开发库进行开发,提供图形化人机接口,实现对用户程序和数据文件的上传和下载。通过测试实验,整个系统实现了对综合信息处理装置进行复位、启动、通信、软件调试、单元测试等。系统具有通用性和扩展性。

  1. Capacitor Voltage Balancing Control for Alternate Arm Multilevel Converter Based on Commutation Angle%基于换流角的桥臂交替导通多电平换流器电容电压控制

    Institute of Scientific and Technical Information of China (English)

    冯亚东; 汪楠楠; 卢宇; 陈勇

    2016-01-01

    The arm of alternate arm multilevel converter ( AAMC ) is composed of full‐bridge sub‐modules in series and insulated gate bipolar transistors ( IGBTs) with inversed parallel diodes in series . AAMC conducts the upper arm and the lower arm in turn to output the multilevel waveform to approximate the positive half and the negative half of the sine wave . How to maintain the voltage of the capacitors of sub‐modules at a preset value is the key problem for the control of AAMC . Based on the energy balance principle of the bridge arm , an energy balance equation for bridge arm is established by commutation the conduction of the upper and down arms at a particular angle , and the calculation method of the commutation angle to balance the capacitor voltage of the sub modules is proposed . By study of the maximum conduction voltage of an arm , complementary property between the solution of two commutation angles and the reactive power is put forward . The optimization selection of commutation angle based on the direction of the reactive power effectively reduces the maximum conduction voltage of the arms and the number of sub‐modules needed by the arm . Through the research of the coupling mechanism of commutation angle and capacitor voltage , a local linear first‐order model of the capacitor voltage is proposed . Based on this , a capacitor voltage control strategy combined with feed‐forward control and proportional‐integral ( PI) control is proposed for improving the stability and adaptability of the voltage . By the PSCAD/EM TDC simulation , the effectiveness of sub‐module capacitor voltage control method based on the commutation angle is verified .%桥臂交替导通多电平换流器(AAMC)的桥臂由多个全桥子模块和带有反向并联二极管的绝缘栅双极型晶体管(IGB T )串联,通过上下桥臂轮流导通来输出多电平的正弦波。如何维持AAMC子模块电容电压稳定是AAMC研究的难点。从桥臂能量

  2. Where was my arm again? Memory-based matching of proprioceptive targets is enhanced by increased target presentation time.

    Science.gov (United States)

    Goble, Daniel J; Noble, Brittany C; Brown, Susan H

    2010-08-30

    Our sense of proprioception is vital for the successful performance of most activities of daily living, and memory-based joint position matching (JPM) tasks are often utilized to quantify such proprioceptive abilities. In the present study we sought to determine if matching a remembered proprioceptive target angle was influenced significantly by the length of time given to develop a neural representation of that position. Thirteen healthy adult subjects performed active matching of passively determined elbow joint angles (amplitude = 20 degrees or 40 degrees extension) in the absence of vision, with either a relatively "short" (3 s) or "long" (12 s) target presentation time. In the long condition, where subjects had a greater opportunity to develop an internal representation of the target elbow joint angle, matching movements had significantly smaller variable errors and were associated with smoother matching movement trajectories of a shorter overall duration. Taken together, these findings provide an important proprioceptive corollary for previous results obtained in studies of visually-guided reaching suggesting that increased exposure to target sensory stimuli can improve the accuracy of matching performance. Further, these results appear to be of particular importance with respect to the estimation of proprioceptive function in individuals with disability, who typically have increased noise in their proprioceptive systems.

  3. Design and Engineering of a Chess-Robotic Arm

    CERN Document Server

    Elouafiq, Ali

    2012-01-01

    In the scope of the "Chess-Bot" project, this study's goal is to choose the right model for the robotic arm that the "the Chess-Bot" will use to move the pawn from a cell to another. In this paper, there is the definition and the structure of a robot arm. Also, the different engineering and kinematics fundamentals of the robot and its components will be detailed. Furthermore, the different structures of robotic arms will be presented and compared based on different criteria. Finally, a model for "the Chess-Bot" arm will be synthesized based on accurate algorithms and equations.

  4. Arm-based Wireless Alarm Technology Application in the Electrical Test%基于ARM的无线报警技术在电气试验中的应用

    Institute of Scientific and Technical Information of China (English)

    王玉前; 于跃

    2014-01-01

    对基于 ARM 处理器的无线报警器进行了研究。该报警器可以在无线传感模式下工作,工作人员可以将报警器携带在身上,以便在处理其他意外情况时可以接收到预警信号。与此同时,该报警器以ARM Cortex-M3为处理器,还可以外扩人机交互模块和液晶显示模块,以便工作人员随时读取数据或进行远程操作。阐述了该报警器的工作原理,设计了控制器电路,无线传感模块,报警模块和电流、电压采集模块的硬件电路图,构建了基于ARM处理器的整套系统工作电路。%The wireless alarm system based on ARM processors was studied. The alarm can work in wireless sensor mode;the staff can carry the alarm in the body, so that when dealing with other unforeseen circumstances can receive the warning signal. At the same time, the alarm with ARM Cortex-M3 processor, but also extend beyond HCI module and LCD module, so that staff ready to read data or for remote operation. Describes the working principle of the alarm, the controller circuit design, wireless sensor module, the alarm module and current hardware circuit voltage acquisition module, the whole system working circuit constructed based on the ARM processor.

  5. Star Formation in Spiral Arms

    CERN Document Server

    Elmegreen, Bruce G

    2011-01-01

    The origin and types of spiral arms are reviewed with an emphasis on the connections between these arms and star formation. Flocculent spiral arms are most likely the result of transient instabilities in the gas that promote dense cloud formation, star formation, and generate turbulence. Long irregular spiral arms are usually initiated by gravitational instabilities in the stars, with the gas contributing to and following these instabilities, and star formation in the gas. Global spiral arms triggered by global perturbations, such as a galaxy interaction, can be wavemodes with wave reflection in the inner regions. They might grow and dominate the disk for several rotations before degenerating into higher-order modes by non-linear effects. Interstellar gas flows through these global arms, and through the more transient stellar spiral arms as well, where it can reach a high density and low shear, thereby promoting self-gravitational instabilities. The result is the formation of giant spiral arm cloud complexes,...

  6. Modernization of African Armed Forces

    DEFF Research Database (Denmark)

    Mandrup, Thomas

    2015-01-01

    Concept paper framing the debate at the Dakar Forum Workshop on Modernization of Armed forces in Africa.......Concept paper framing the debate at the Dakar Forum Workshop on Modernization of Armed forces in Africa....

  7. 基于ARM9的锌空电池生产线调速控制系统的设计%The Design of Zinc-air Battery Production Line Speed Control System Based on ARM9

    Institute of Scientific and Technical Information of China (English)

    肖艳军; 唐智; 刘伟; 关玉明

    2009-01-01

    在锌空电池"干嵌法"生产中,对于送料电机、皮带传送电机、轧制电机的速度匹配控制有着很高的要求,在此,我们提出了以ARM9为核心元件的速度匹配控制系统的设计.本文详细介绍了基于S3C2410X调速控制系统的工作原理、硬件的设计以及软件的结构与功能.该系统用传感器采集电池极片的厚度、致密度、主电机转速信号,通过信号调理后输入主控制器,主控制器经过模糊计算来控制三台伺服电机动作.

  8. 基于ARM9的整数小波阈值压缩算法及其EVC实现%Integer wavelet threshold compression algorithm based on ARM9 and its EVC realization

    Institute of Scientific and Technical Information of China (English)

    孙金凤; 周国烛; 马红麟; 王学伟

    2007-01-01

    采用传统的一代小波变换进行数据压缩,存在实时性差,内存需求量大等问题.本文从小波滤波器的多相位矩阵出发,利用Euclidean分解方法,实现了小波变换由传统卷积模式到提升算法的转变,并进行了整数提升,克服了一代小波的不足.在此基础上提出了一种改进的整数小波阈值压缩算法,在ARM9上利用EVC予以实现.实验表明该算法在均方误差为0.3490%时,压缩比为11.875%,计算速度快,适合应用在实时性要求较强的场合.

  9. Design and Realization of GUI Based on ARM Cortex-M3%基于ARM Cortex-M3的图形用户界面设计和实现

    Institute of Scientific and Technical Information of China (English)

    韩定

    2015-01-01

    采用基于Cortex-M3内核的LPC1788为主控芯片和320(RGB)*480 pixels的带触摸点阵液晶屏,应用emWin图形库设计了一款简单易用的小型人机交互界面,并提供大容量的图片存储空间和可扩展字库存储空间,便于用户使用,可以广泛应用于家庭自动化和工业控制领域。%The ARM Cortex-M3 kernel processor LPC1788 and 320*480 pixels LCD with touch is used to design a small Graphical User Interface. EmWin is a kind of open source software, which is used to GUI embedded system. It can be widely used in home automation and industrial control.

  10. Determination of cerium ion by polymeric membrane and coated graphite electrode based on novel pendant armed macrocycle

    Energy Technology Data Exchange (ETDEWEB)

    Singh, Ashok K., E-mail: akscyfcy@iitr.ernet.in [Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee 247 667 (India); Singh, Prerna [Department of Chemistry, Indian Institute of Technology-Roorkee, Roorkee 247 667 (India)

    2010-08-24

    Plasticized membranes using 2,3,4:12,13,14-dipyridine-1,3,5,8,11,13,15,18-octaazacycloicosa-2,12-diene (L{sub 1}) and 2,3,4:12,13,14-dipyridine-1,5,8,11,15,18-hexamethylacrylate- 1,3,5,8,11,13,15,18-octaazacycloicosa-2,12-diene (L{sub 2}) have been prepared and explored as Ce(III) selective sensors. Effect of various plasticizers viz. dibutylphthalate (DBP), tri-n-butylphthalate (TBP), o-nitrophenyloctylether (o-NPOE), dioctylphthalate (DOP), benzylacetate (BA) and anion excluders, sodium tetraphenylborate (NaTPB) and potassium tetrakis p-(chlorophenyl) borate was studied in detail and improved performance was observed. Optimum performance was observed for the membrane sensor having a composition of L{sub 2}:PVC:o-NPOE:KTpClPB in the ratio of 6:34:58:2 (w/w, mg). The performance of the membrane based on L{sub 2} was compared with polymeric membrane electrode (PME) as well as with coated graphite electrode (CGE). The electrodes exhibit Nernstian slope for Ce(III) ions with limits of detection of 8.3 x 10{sup -8} mol L{sup -1} for PME and 7.7 x 10{sup -9} mol L{sup -1} for CGE. The response time for PME and CGE was found to be 12 s and 10 s respectively. The potentiometric responses are independent of the pH of the test solution in the pH range 3.5-7.5 for PME and 2.5-8.5 for CGE. The CGE could be used for a period of 5 months. The practical utility of the CGE has been demonstrated by its usage as an indicator electrode in potentiometric titration of oxalate and fluoride ions with Ce(III) solution. The proposed electrode was also successfully applied to the determination of fluoride ions in mouthwash solution and oxalate ions in real samples.

  11. 基于人体工程学的仿人机械臂构型%Configuration of Humanoid Robotic Arm Based on Human Engineering

    Institute of Scientific and Technical Information of China (English)

    赵京; 宋春雨; 杜滨

    2013-01-01

    针对仿人机械臂构型问题,提出一种新的筛选方法,并确定串联结构方式下最符合人臂特征的仿人机械臂构型.从人体解剖学的角度出发,分析人臂的运动机理,并结合人体测量学和机器人学相关原理构建6种不同的仿人机械臂构型.提出全局相对可操作度指标对不同构型进行灵活性分析,并采用可视化方法绘制出各构型的运动灵活性性能分布图.根据人臂的运动特性分析人臂的运动工作空间,将各构型仿人机械臂工作空间与其对比,从而筛选出串联方式下的最佳仿人机械臂构型.该结果为仿人机械臂的设计提供了理论依据,并为后续运动规划奠定了基础.%A new screening method is proposed in configuring humanoid robotic arm,and a series configuration which is most consistent with the human arm characteristics is constructed The morement mechamnsm of human arm from the point of view of human anatomy is analyzed,and 6 types of humanoid robotic arm combined with the mechanism of anthropometry and robotics are constructed.The global relative manipulability index is put forward,and the dexterity of different types of humanoid robotic arm with this index are analyzed.The visualization method is used to plot the image of dexterous performance distribution.The workspaces of human arm are analyzed,and different types of humanoid robotic arm's workspace with it are contrasted,thereby screening the best type of humanoid robotic arm.The results lay the foundation for humanoid robotic arm design and follow-up study of motion planning.

  12. The suppressor of cytokine signaling SOCS1 promotes apoptosis of intestinal epithelial cells via p53 signaling in Crohn's disease.

    Science.gov (United States)

    Cui, Xiaopeng; Shan, Xiaohang; Qian, Ji; Ji, Qianqian; Wang, Liang; Wang, Xiaotong; Li, Manhua; Ding, Haifang; Liu, Qingqing; Chen, Lingling; Zhang, Dongmei; Ni, Runzhou

    2016-08-01

    The suppressor of cytokine signaling SOCS1 is a member of the cytokine signaling pathway inhibitor family, which is induced by the IFN-γ induced JAK signaling pathway. The expression of SOCS1 has been found to increase in Crohn's disease (CD) patients, but the role of SOCS1 in intestinal epithelium is unclear. This study was designed to investigate whether SOCS1 has a role in the death of intestinal epithelial cells and intestinal injury. The results showed that the expression of SOCS1 increased in CD patients, and the expression of SOCS1, p-p53 and PUMA increased in the mouse TNBS induced colitis model. Using IFN-γ treated HT-29 cells as an apoptotic model of intestinal epithelial cells in vitro, we confirmed that SOCS1 promoted apoptosis of intestinal epithelial cells by activating p53. In HT-29 cells which were treated with IFN-γ, the interaction between p53 and SOCS1 and phosphorylation of p53 were significantly higher than untreated cells. When knocking SOCS1 down by using SOCS1 siRNA, phosphorylation of p53 and apoptosis of intestinal epithelial cells which was induced by IFN-γ were significantly inhibited. In summary, our findings suggest that SOCS1 may promote apoptosis of intestinal epithelial cells at least partly through mediating p53 signaling.

  13. 基于MATLAB的移栽机械臂运动学分析与仿真%Kinematics Analysis and Simulation of Transplanting Robot Arm Based on MATLAB

    Institute of Scientific and Technical Information of China (English)

    胡飞; 尹文庆; 陈彩蓉

    2012-01-01

    为了实现对四自由度移栽机械臂的精确控制,采用D-H法建立机械臂的连杆坐标系和运动学方程,实现了机械臂运动学正解.根据移栽机械臂的特点及参数,用解析法求得移栽机械臂的运动学逆解.运用MATLAB中的Robotics Toolbox工具箱对移栽机械臂进行运动学仿真,验证了所求得的正解和逆解.%In order to control the four - dimension transplanting robot arm accurately, the kinematics equation and the joint coordinate system of robot arm were established by using Denavit - Hartenberg method, and the forward solution of the kinematic equation was solved. According to the characteristics and parameters of transplanting robot arm, the inverse solution of the kinematics equation was solved by using the analytic method. The forward and inverse kinematics solutions of transplanting robot arm were proved by the kinematics simulation with Robotics Toolbox of MATLAB, which provided a theoretical foundation for trajectory planning and precise controlling of transplanting robot arm.

  14. Sense of coherence and health. The construction of an amendment to Antonovsky's sense of coherence scale (SOC II).

    Science.gov (United States)

    Flensborg-Madsen, Trine; Ventegodt, Søren; Merrick, Joav

    2006-06-20

    In two previous papers, we concluded that (1) the sense of coherence (SOC) scale developed by Aaron Antonovsky (1923-1994) is unable to prove the association between SOC and the physical health empirically and (2) the SOC scale is unlikely to be a fair materialization of Antonovsky's idea and, thus, unlikely to measure SOC correctly. In order to improve the scale, we developed some new questions that we suggest should be incorporated in a new questionnaire and scale (SOC II) derived directly from Antonovsky's idea and the three key explanatory concepts of SOC: comprehensibility, manageability, and meaningfulness. We hope that this new scale will demonstrate a stronger correlation between SOC and physical health.

  15. Molecular characterization and immune response to lipopolysaccharide (LPS) of the suppressor of cytokine signaling (SOCS)-1, 2 and 3 genes in Nile tilapia (Oreochromis niloticus).

    Science.gov (United States)

    Liu, Cai-Zhi; He, An-Yuan; Chen, Li-Qiao; Limbu, Samwel Mchele; Wang, Ya-Wen; Zhang, Mei-Ling; Du, Zhen-Yu

    2016-03-01

    Suppressor of cytokine signaling (SOCS) proteins are inverse feedback regulators of cytokine and hormone signaling mediated by the Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling pathway that are involved in immunity, growth and development of organisms. In the present study, three SOCS genes, SOCS-1, SOCS-2 and SOCS-3, were identified in an economically important fish, Nile tilapia (Oreochromis niloticus) referred to as NtSOCS-1, NtSOCS-2 and NtSOCS-3. Multiple alignments showed that, the three SOCS molecules share highly conserved functional domains, including the SRC homology 2 (SH2) domain, the extended SH2 subdomain (ESS) and the SOCS box with others vertebrate counterparts. Phylogenetic analysis indicated that NtSOCS-1, 2 and 3 belong to the SOCS type II subfamily. Whereas NtSOCS-1 and 3 showed close evolutionary relationship with Perciformes, NtSOCS-2 was more related to Salmoniformes. Tissue specific expression results showed that, NtSOCS-1, 2 and 3 were constitutively expressed in all nine tissues examined. NtSOCS-1 and 3 were highly expressed in immune-related tissues, such as gills, foregut and head kidney. However, NtSOCS-2 was superlatively expressed in liver, brain and heart. In vivo, NtSOCS-1 and 3 mRNA levels were up-regulated after lipopolysaccharide (LPS) challenge while NtSOCS-2 was down-regulated. In vitro, LPS stimulation increased NtSOCS-3 mRNA expression, however it inhibited the transcription of NtSOCS-1 and 2. Collectively, our findings suggest that, the NtSOCS-1 and 3 might play significant role(s) in innate immune response, while NtSOCS-2 may be more involved in metabolic regulation.

  16. SoCRocket: A Virtual Platform for SoC Design

    Science.gov (United States)

    Fossati, Luca; Schuster, Thomas; Meyer, Rolf; Berekovic, Mladen

    2013-08-01

    how SoCRocket was used to optimize the design of a LEON3-based SoC targeted to the execution of an implementation of the CCSDS standard n.123 for the lossless compression of hyperspectral images.

  17. 基于ARM linux的电力光纤光路保护硬件系统的设计%Design of Power Optical Fiber Protection Hardware System Based on ARM Linux

    Institute of Scientific and Technical Information of China (English)

    徐泽晖; 杜书; 王一焰; 赵波; 陈昶; 冯盈

    2014-01-01

    光纤通信网络凭借其丰富的带宽资源、数据传输的高速率、理想的抗干扰性以及其较低的成本,已经成为电力通信骨干网的首选。电力光纤通信网络目前已经具有较为可观的规模,对电力传输系统的安全稳定以及电力通信系统的畅通起到至关重要的作用。因此,光传输网络的自愈性已成为至关重要的问题。本系统采用1:1的光路保护模式,系统可分为光功率的监测、计算模块,控制模块、以及光开关切换模块。并采用ARM+Linux的架构,开发出一套大范围、高精度、高稳定性的光路保护硬件系统。经过实验与测试,该切换系统的切换速度能达到44ms。该硬件系统运行稳定、可靠,切换速度达到了预定的目标:50ms,满足电力光纤通信的要求,具有重要的实用价值。%Optical fiber communication network, with its abundant bandwidth resources, high-speed data transfer rate, the ideal anti-interference and its low cost, has become the preferred power communication backbone. Power optical fiber communication network now has a more substantial scale, security and stability as well as the smooth flow of power to the communication system of power transmis-sion systems play a crucial role. Therefore, self-healing optical transmission network has become a criti-cal issue. The system uses a 1:1 optical protection mode, the system can be divided into optical power monitoring, calculation module, control module, and an optical switch module. Using ARM+Linux archi-tecture, developed a large-scale, high-precision, high stability of the optical path protection hardware system. Through experiments and testing, the switching speed of the switching system can reach 44ms. The hardware system is stable, reliable, and switching speed reaches intended target:50 ms, meet the re-quirements of the power of optical fiber communication has important practical value.

  18. ARM User Survey Report

    Energy Technology Data Exchange (ETDEWEB)

    Roeder, LR

    2010-06-22

    The objective of this survey was to obtain user feedback to, among other things, determine how to organize the exponentially growing data within the Atmospheric Radiation Measurement (ARM) Climate Research Facility, and identify users’ preferred data analysis system. The survey findings appear to have met this objective, having received approximately 300 responses that give insight into the type of work users perform, usage of the data, percentage of data analysis users might perform on an ARM-hosted computing resource, downloading volume level where users begin having reservations, opinion about usage if given more powerful computing resources (including ability to manipulate data), types of tools that would be most beneficial to them, preferred programming language and data analysis system, level of importance for certain types of capabilities, and finally, level of interest in participating in a code-sharing community.

  19. Design of Networked Access Control and Attendance System Based on ARM-Linux and JavaEE%基于ARM-Linux与JavaEE网络化门禁考勤系统的设计

    Institute of Scientific and Technical Information of China (English)

    房好帅; 李志鹏; 郑哲豪; 王春景

    2014-01-01

    Proposes a design proposal of networked access control and attendance system, includes access control and attendance clients connect server via network. The hardware of access control and attendance client consists of ARM as the core processor, connects the RFID card reader, camera, LCD and access controller. Develops the service interfaces using JavaEE technology, and then deployed in Tomcat which the server has installed. The access control attendance record information can saved in database and by FTP file transferring. The overall architecture of this design has a preferable expansibility, only after a few secondary devel-opments, existing personnel management systems can be integrated with the design proposal.%提出了一种网络化门禁考勤系统的设计方案,由门禁考勤机和后台服务器通过网络连接构成。门禁考勤机以ARM处理器为核心,连接RFID读卡器、摄像头、LCD显示屏、门禁控制器等构成硬件系统,移植Linux作为嵌入式操作系统;采用JavaEE技术实现后台服务接口,部署在后台服务器安装的Tomcat中;利用数据库和FTP文件传输保存门禁考勤信息记录;整体架构设计扩展性较好,现有的人事管理系统经过少量的二次开发便可与本方案进行集成。

  20. Comparison of the clinical accuracy of cervical (C2-C7) pedicle screw insertion assisted by fluoroscopy, computed tomography-based navigation, and intraoperative three-dimensional C-arm navigation

    Institute of Scientific and Technical Information of China (English)

    LIU Ya-jun; TIAN Wei; LIU Bo; LI Qin; HU Lin; LI Zhi-yu; YUAN Qiang; L(U) Yan-wei; SUN Yu-zhen

    2010-01-01

    Background The complicated anatomy of the cervical spine and the variation among pedicles reduces the accuracy and increases the risk of neurovascular complications associated with screw implantation in this region. In this study, we compared the accuracy of cervical (C2-C7) pedicle screw fixation assisted by X-ray fluoroscopy, computed tomography (CT)-based navigation, or intraoperative three-dimensional (3D) C-arm navigation.Methods This prospective cohort study was performed in 82 consecutive patients who underwent cervical pedicle screw fixation. The accuracy of screw insertion was assessed by postoperative CT scan with 3D reconstruction. The accuracy of screw insertion was assessed as: excellent (screw completely within pedicle); acceptable (≤ 1 mm screw outside pedicle cortex); poor (>1 mm screw outside pedicle cortex).Results A total of 145 screws were inserted in 24 patients who underwent C-arm fluoroscopy. Of these, 96 screws (66.2%) were excellent, 37 (25.5%) were acceptable, and 12 (8.3%) were poor. One hundred and fifty-nine screws were inserted in 29 patients in the CT-based navigation group. Among these, 141 (88.7%) were excellent, 14 (8.8%) were acceptable, and 4 (2.5%) were poor. A total of 140 screws were inserted in 29 patients in the intraoperative 3D C-arm navigation group, of which 127 (90.7%) were excellent, and 13 (9.3%) were acceptable. No severe or permanent neurovascular complications associated with screw insertion were observed in any patient.Conclusione CT-based and intraoperative 3D C-arm navigation were similarly accurate, and were both significantly more accurate than C-arm fluoroscopy for guiding cervical pedicle screw fixation. They were able to accurately guide the angle and depth of screw placement using visual 3D images. These two techniques are therefore preferable for high-risk cervical pedicle screw fixation. The ease and convenience of intraoperative 3D C-arm navigation suggests that it may replace virtual