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Sample records for automatic train control

  1. Automatically controlled training systems

    International Nuclear Information System (INIS)

    This paper reports that the computer system for NPP personnel training was developed for training centers in the Soviet Union. The system should be considered as the first step in training, taking into account that further steps are to be devoted to part-task and full scope simulator training. The training room consists of 8-12 IBM PC/AT personal computers combined into a network. A trainee accesses the system in a dialor manner. Software enables the instructor to determine the trainee's progress in different subjects of the program. The quality of any trainee preparedness may be evaluated by Knowledge Control operation. Simplified dynamic models are adopted for separate areas of the program. For example, the system of neutron flux monitoring has a dedicated model. Currently, training, requalification and support of professional qualifications of nuclear power plant operators is being emphasized. A significant number of emergency situations during work are occurring due to operator errors. Based on data from September-October 1989, more than half of all unplanned drops in power and stoppages of power plants were due to operator error. As a comparison, problems due to equipment malfunction accounted for no more than a third of the total. The role of personnel, especially of the operators, is significant during normal operations, since energy production costs as well as losses are influenced by the capability of the staff. These facts all point to the importance of quality training of personnel

  2. Consistently Trained Artificial Neural Network for Automatic Ship Berthing Control

    Directory of Open Access Journals (Sweden)

    Y.A. Ahmed

    2015-09-01

    Full Text Available In this paper, consistently trained Artificial Neural Network controller for automatic ship berthing is discussed. Minimum time course changing manoeuvre is utilised to ensure such consistency and a new concept named ‘virtual window’ is introduced. Such consistent teaching data are then used to train two separate multi-layered feed forward neural networks for command rudder and propeller revolution output. After proper training, several known and unknown conditions are tested to judge the effectiveness of the proposed controller using Monte Carlo simulations. After getting acceptable percentages of success, the trained networks are implemented for the free running experiment system to judge the network’s real time response for Esso Osaka 3-m model ship. The network’s behaviour during such experiments is also investigated for possible effect of initial conditions as well as wind disturbances. Moreover, since the final goal point of the proposed controller is set at some distance from the actual pier to ensure safety, therefore a study on automatic tug assistance is also discussed for the final alignment of the ship with actual pier.

  3. Optimization of Automatic Train Control for Energy Management and Service Reliability

    Energy Technology Data Exchange (ETDEWEB)

    Susanna P. Gordon; Richard M. Wheeler; Timothy J. Sa; Donald A. Sheaffer

    1999-11-01

    A new generation of automatic train control systems is currently under development in the commuter-rail transit industry. These systems will utilize radio communication between wayside control computers and trains in order to provide high precision train control beyond the capability of today's automatic systems. The Bay Area Rapid Transit (BART) system is developing such a modern control system in collaboration with Harmon Industries. This system, called the Advanced Automatic Train Control (AATC) system, will allow for precision train locating and control, and will facilitate coordination of the trajectories of multiple trains. This system will be capable of running trains more closely together and decreasing the time a train requires to traverse the system, while simultaneously operating with a more modest traction power infrastructure, and providing a smoother, more comfortable ride to commuters. The authors have collaborated with BART to develop a simulator of the AATC system and the traction power system, and they have utilized this simulator as a testbed for the development of advanced train control techniques. Several train control algorithms, including one employing a neural network for train voltage prediction, have been developed and tested in the simulator. Smoother train trajectories, reduced power infrastructure requirements, and reduced energy consumption have been demonstrated. Improved service reliability is also expected to result.

  4. Automatic Training of Rat Cyborgs for Navigation

    OpenAIRE

    Yu, Yipeng; Wu, Zhaohui; Xu, Kedi; Gong, Yongyue; Zheng, Nenggan; Zheng, Xiaoxiang; Pan, Gang

    2016-01-01

    A rat cyborg system refers to a biological rat implanted with microelectrodes in its brain, via which the outer electrical stimuli can be delivered into the brain in vivo to control its behaviors. Rat cyborgs have various applications in emergency, such as search and rescue in disasters. Prior to a rat cyborg becoming controllable, a lot of effort is required to train it to adapt to the electrical stimuli. In this paper, we build a vision-based automatic training system for rat cyborgs to rep...

  5. Automatic Training of Rat Cyborgs for Navigation

    Science.gov (United States)

    Yu, Yipeng; Wu, Zhaohui; Xu, Kedi; Gong, Yongyue; Zheng, Nenggan; Zheng, Xiaoxiang; Pan, Gang

    2016-01-01

    A rat cyborg system refers to a biological rat implanted with microelectrodes in its brain, via which the outer electrical stimuli can be delivered into the brain in vivo to control its behaviors. Rat cyborgs have various applications in emergency, such as search and rescue in disasters. Prior to a rat cyborg becoming controllable, a lot of effort is required to train it to adapt to the electrical stimuli. In this paper, we build a vision-based automatic training system for rat cyborgs to replace the time-consuming manual training procedure. A hierarchical framework is proposed to facilitate the colearning between rats and machines. In the framework, the behavioral states of a rat cyborg are visually sensed by a camera, a parameterized state machine is employed to model the training action transitions triggered by rat's behavioral states, and an adaptive adjustment policy is developed to adaptively adjust the stimulation intensity. The experimental results of three rat cyborgs prove the effectiveness of our system. To the best of our knowledge, this study is the first to tackle automatic training of animal cyborgs.

  6. Automatic Camera Control

    DEFF Research Database (Denmark)

    Burelli, Paolo; Preuss, Mike

    2014-01-01

    Automatically generating computer animations is a challenging and complex problem with applications in games and film production. In this paper, we investigate howto translate a shot list for a virtual scene into a series of virtual camera configurations — i.e automatically controlling the virtual...... camera. We approach this problem by modelling it as a dynamic multi-objective optimisation problem and show how this metaphor allows a much richer expressiveness than a classical single objective approach. Finally, we showcase the application of a multi-objective evolutionary algorithm to generate a shot...

  7. Automaticity or active control

    DEFF Research Database (Denmark)

    Tudoran, Ana Alina; Olsen, Svein Ottar

    This study addresses the quasi-moderating role of habit strength in explaining action loyalty. A model of loyalty behaviour is proposed that extends the traditional satisfaction–intention–action loyalty network. Habit strength is conceptualised as a cognitive construct to refer to the psychologic......, respectively, between intended loyalty and action loyalty. At high levels of habit strength, consumers are more likely to free up cognitive resources and incline the balance from controlled to routine and automatic-like responses....

  8. Mnesors for automatic control

    CERN Document Server

    Champenois, Gilles

    2009-01-01

    Mnesors are defined as elements of a semimodule over the min-plus integers. This dual structure is able to merge vector properties and boolean properties, which makes it appropriate for hybrid systems. We apply it to the control of an inverted pendulum and we design a logical controller, that is, without the usual algebra of real numbers.

  9. Intelligent automatic generation control

    CERN Document Server

    Bevrani, Hassan

    2011-01-01

    ""I enjoyed reading the book and found it informative. It is certainly a book I would recommend to postgraduate students and researchers in the area of intelligent control systems and their application to power system control. My congratulations to the authors.""-Pouyan Pourbeik, IEEE Power and Energy Magazine

  10. Mnesors for automatic control

    OpenAIRE

    Champenois, Gilles

    2009-01-01

    Mnesors are defined as elements of a semimodule over the min-plus integers. This two-sorted structure is able to merge graduation properties of vectors and idempotent properties of boolean numbers, which makes it appropriate for hybrid systems. We apply it to the control of an inverted pendulum and design a full logical controller, that is, without the usual algebra of real numbers.

  11. Automatic Control of Water Pumping Stations

    Institute of Scientific and Technical Information of China (English)

    Muhannad Alrheeh; JIANG Zhengfeng

    2006-01-01

    Automatic Control of pumps is an interesting proposal to operate water pumping stations among many kinds of water pumping stations according to their functions.In this paper, our pumping station is being used for water supply system. This paper is to introduce the idea of pump controller and the important factors that must be considering when we want to design automatic control system of water pumping stations. Then the automatic control circuit with the function of all components will be introduced.

  12. Automatic control of nuclear power plants

    International Nuclear Information System (INIS)

    The fundamental concepts in automatic control are surveyed, and the purpose of the automatic control of pressurized water reactors is given. The response characteristics for the main components are then studied and block diagrams are given for the main control loops (turbine, steam generator, and nuclear reactors)

  13. Automatic reactor power control device

    International Nuclear Information System (INIS)

    Anticipated transient without scram (ATWS) of a BWR type reactor is judged to generate a signal based on a reactor power signal and a scram actuation demand signal. The ATWS signal and a predetermined water level signal to be generated upon occurrence of ATWS are inputted, and an injection water flow rate signal exhibiting injection water flow rate optimum to reactor flooding and power suppression is outputted. In addition, a reactor pressure setting signal is outputted based on injection performance of a high pressure water injection system or a lower pressure water injection system upon occurrence of ATWS. Further, the reactor pressure setting signal is inputted to calculate opening/closing setting pressure of a main steam relief valve and output an opening setting pressure signal and a closure setting pressure signal for the main steam relief valve. As a result, the reactor power and the reactor water level can be automatically controlled even upon occurrence of ATWS due to failure of insertion of all of the control rods thereby enabling to maintain integrity and safety of the reactor, the reactor pressure vessel and the reactor container. (N.H.)

  14. Integrated Coordinated Optimization Control of Automatic Generation Control and Automatic Voltage Control in Regional Power Grids

    OpenAIRE

    Qiu-Yu Lu; Wei Hu; Le Zheng; Yong Min; Miao Li; Xiao-Ping Li; Wei-Chun Ge; Zhi-Ming Wang

    2012-01-01

    Automatic Generation Control (AGC) and Automatic Voltage Control (AVC) are key approaches to frequency and voltage regulation in power systems. However, based on the assumption of decoupling of active and reactive power control, the existing AGC and AVC systems work independently without any coordination. In this paper, a concept and method of hybrid control is introduced to set up an Integrated Coordinated Optimization Control (ICOC) system for AGC and AVC. Concerning the diversity of contro...

  15. Coke oven automatic combustion control system

    Energy Technology Data Exchange (ETDEWEB)

    Shihara, Y.

    1981-01-01

    This article describes and discusses the development and application of an automatic combustion control system for coke ovens that has been used at the Yawata Works of the Nippon Steel Corporation, Japan. (In Japanese)

  16. Control of training instrument

    International Nuclear Information System (INIS)

    This report describes the annual results on control of training instrument. The scope and contents are the following: 1. Control of Compact Nuclear Simulator 2. Control of Radiation/Radioactivity Measurement 3. Control of Non-Destructive Testing Equipment 4. Control of Chemical Equipment 5. Control of Personal Computer 6. Other related Lecture Aid Equipment. Efforts were employed to upgrade the training environment through retrofitting experimental facilities, compiling teaching materials and reforcing audio-visual aids. The Nuclear Training Center executed the open-door training courses for 2,496 engineers/scientists from the nuclear regulatory, nuclear industries, research institutes and other related organizations by means of offering 45 training courses during the fiscal year 1995. (author). 15 tabs., 7 figs., 13 refs

  17. Towards Automatic Decentralized Control Structure Selection

    DEFF Research Database (Denmark)

    Jørgensen, John Bagterp; Jørgensen, Sten Bay

    2000-01-01

    A subtask in integration of design and control of chemical processes is the selection of a control structure. Automating the selection of the control structure enables sequential integration of process and control design. As soon as the process is specified or computed, a structure for...... decentralized control is determined automatically, and the resulting decentralized control structure is automatically tuned using standard techniques. Dynamic simulation of the resulting process system gives immediate feedback to the process design engineer regarding practical operability of the process. The...... control structure selection problem is formulated as a special MILP employing cost coefficients which are computed using Parseval's theorem combined with RGA and IMC concepts. This approach enables selection and tuning of large-scale plant-wide decentralized controllers through efficient combination of...

  18. Towards Automatic Decentralized Control Structure Selection

    DEFF Research Database (Denmark)

    A subtask in integration of design and control of chemical processes is the selection of a control structure. Automating the selection of the control structure enables sequential integration of process and controld esign. As soon as the process is specified or computed, a structure for...... decentralized control is determined automatically, and the resulting decentralized control structure is automatically tuned using standard techniques. Dynamic simulation of the resulting process system gives immediate feedback to the process design engineer regarding practical operability of the process. The...... control structure selection problem is formulated as a special MILP employing cost coefficients which are computed using Parseval's theorem combined with RGA and IMC concepts. This approach enables selection and tuning of large-scale plant-wide decentralized controllers through efficient combination of...

  19. Automatic Gain Control in Compact Spectrometers.

    Science.gov (United States)

    Protopopov, Vladimir

    2016-03-01

    An image intensifier installed in the optical path of a compact spectrometer may act not only as a fast gating unit, which is widely used for time-resolved measurements, but also as a variable attenuator-amplifier in a continuous wave mode. This opens the possibility of an automatic gain control, a new feature in spectroscopy. With it, the user is relieved from the necessity to manually adjust signal level at a certain value that it is done automatically by means of an electronic feedback loop. It is even more important that automatic gain control is done without changing exposure time, which is an additional benefit in time-resolved experiments. The concept, algorithm, design considerations, and experimental results are presented. PMID:26810181

  20. Automatic control of movable detectors

    International Nuclear Information System (INIS)

    An invention is described, relating to a microprocessor based control system for a plurality of movable detectors e.g. a nuclear reactor flux mapping system. It consists of two operationally independent electronic subsystems each including a microprocessor which controls the positioning of separate groups of in-core detectors within core thimbles. A communications link, in the form of auxiliary bases and buffers, is provided between the two subsystems to enable one subsystem and its associated group of detectors to assume the flux mapping responsibility of the other subsystem in the event of a subsystem malfunction. Normally, this communication involves presentation of system status information from one subsystem to a multi-port memory in the other system for coordinate control of both systems. This arrangement provides increased system availability as compared to the prior art systems. (author)

  1. Component protection based automatic control

    International Nuclear Information System (INIS)

    Control and safety systems as well as operation procedures are designed on the basis of critical process parameters limits. The expectation is that short and long term mechanical damage and process failures will be avoided by operating the plant within the specified constraints envelopes. In this paper, one of the Advanced Liquid Metal Reactor (ALMR) design duty cycles events is discussed to corroborate that the time has come to explicitly make component protection part of the control system. Component stress assessment and aging data should be an integral part of the control system. Then transient trajectory planning and operating limits could be aimed at minimizing component specific and overall plant component damage cost functions. The impact of transients on critical components could then be managed according to plant lifetime design goals. The need for developing methodologies for online transient trajectory planning and assessment of operating limits in order to facilitate the explicit incorporation of damage assessment capabilities to the plant control and protection systems is discussed. 12 refs

  2. Portable machine welding head automatically controls arc

    Science.gov (United States)

    Oleksiak, C. E.; Robb, M. A.

    1967-01-01

    Portable weld tool makes weld repairs out-of-station and on the side opposite the original weld. It provides full automatic control of the arc voltage, current, wire feed, and electrode travel speed in all welding attitudes. The device is readily adaptable to commercially available straight polarity dc weld packs.

  3. Automatic Synthesis of Robust and Optimal Controllers

    DEFF Research Database (Denmark)

    Cassez, Franck; Jessen, Jan Jacob; Larsen, Kim Guldstrand;

    2009-01-01

    In this paper, we show how to apply recent tools for the automatic synthesis of robust and near-optimal controllers for a real industrial case study. We show how to use three different classes of models and their supporting existing tools, Uppaal-TiGA for synthesis, phaver for verification, and...

  4. Research on Fuzzy Control for Automatic Transmission of Tracked Vehicles

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A principle of fuzzy control for tracked vehicles is proposed to make its automatic transmission system be able to adapt complex running conditions, and a model of its power train is established to be used in simulation. Based on the fuzzy control method, a fuzzy shift control system composed of a basic shift strategy and a fuzzy modification module is developed to improve the dynamic characteristics and cross-country maneuverability. Simulation results show that the fuzzy shift strategy can improve the shift quality under manifold driving conditions and avoid cycled shift effectively. Therefore,the proposed fuzzy shift strategies are proved to be feasible and practicable.

  5. Integrated Coordinated Optimization Control of Automatic Generation Control and Automatic Voltage Control in Regional Power Grids

    Directory of Open Access Journals (Sweden)

    Qiu-Yu Lu

    2012-09-01

    Full Text Available Automatic Generation Control (AGC and Automatic Voltage Control (AVC are key approaches to frequency and voltage regulation in power systems. However, based on the assumption of decoupling of active and reactive power control, the existing AGC and AVC systems work independently without any coordination. In this paper, a concept and method of hybrid control is introduced to set up an Integrated Coordinated Optimization Control (ICOC system for AGC and AVC. Concerning the diversity of control devices and the characteristics of discrete control interaction with a continuously operating power system, the ICOC system is designed in a hierarchical structure and driven by security, quality and economic events, consequently reducing optimization complexity and realizing multi-target quasi-optimization. In addition, an innovative model of Loss Minimization Control (LMC taking into consideration active and reactive power regulation is proposed to achieve a substantial reduction in network losses and a cross iterative method for AGC and AVC instructions is also presented to decrease negative interference between control systems. The ICOC system has already been put into practice in some provincial regional power grids in China. Open-looping operation tests have proved the validity of the presented control strategies.

  6. 11th Portuguese Conference on Automatic Control

    CERN Document Server

    Matos, Aníbal; Veiga, Germano

    2015-01-01

    During the last 20 years the Portuguese association of automatic control, Associação Portuguesa de Controlo Automático, with the sponsorship of IFAC have established the CONTROLO conference as a reference international forum where an effective exchange of knowledge and experience amongst researchers active in various theoretical and applied areas of systems and control can take place, always including considerable space for promoting new technical applications and developments, real-world challenges and success stories. In this 11th edition the CONTROLO conference evolved by introducing two strategic partnerships with Spanish and Brazilian associations in automatic control, Comité Español de Automática and Sociedade Brasileira de Automatica, respectively.

  7. Automatic control algorithm effects on energy production

    Science.gov (United States)

    Mcnerney, G. M.

    1981-01-01

    A computer model was developed using actual wind time series and turbine performance data to simulate the power produced by the Sandia 17-m VAWT operating in automatic control. The model was used to investigate the influence of starting algorithms on annual energy production. The results indicate that, depending on turbine and local wind characteristics, a bad choice of a control algorithm can significantly reduce overall energy production. The model can be used to select control algorithms and threshold parameters that maximize long term energy production. The results from local site and turbine characteristics were generalized to obtain general guidelines for control algorithm design.

  8. The measurement of some signals for control system of 60Co scan system for freight train

    International Nuclear Information System (INIS)

    The 60Co Scan system for Freight Train has an automatic inspection flow, so it is very crucial that the measurement of the signals for the automatic control system. In this paper, we mainly introduce the identification of the intervals between two freight train carriage, the measurement of the train speed, and identification of freight train

  9. Uranium casting furnace automatic temperature control development

    International Nuclear Information System (INIS)

    Development of an automatic molten uranium temperature control system for use on batch-type induction casting furnaces is described. Implementation of a two-color optical pyrometer, development of an optical scanner for the pyrometer, determination of furnace thermal dynamics, and design of control systems are addressed. The optical scanning system is shown to greatly improve pyrometer measurement repeatability, particularly where heavy floating slag accumulations cause surface temperature gradients. Thermal dynamics of the furnaces were determined by applying least-squares system identification techniques to actual production data. A unity feedback control system utilizing a proportional-integral-derivative compensator is designed by using frequency-domain techniques. 14 refs

  10. Automatic dose-rate controlling equipment

    International Nuclear Information System (INIS)

    The patent of a dose-rate controlling equipment that can be attached to X-ray image-amplifiers is presented. In the new equipment the current of the photocatode of the image-amplifier is led into the regulating unit, which controls the X-ray generator automatically. The advantages of the equipment are the following: it can be simply attached to any type of X-ray image-amplifier, it accomplishes fast and sensitive regulation, it makes possible the control of both the mA and the kV values, it is attached to the most reliable point of the image-transmission chain. (L.E.)

  11. Adaptive neuro-fuzzy inference system based automatic generation control

    Energy Technology Data Exchange (ETDEWEB)

    Hosseini, S.H.; Etemadi, A.H. [Department of Electrical Engineering, Sharif University of Technology, Tehran (Iran)

    2008-07-15

    Fixed gain controllers for automatic generation control are designed at nominal operating conditions and fail to provide best control performance over a wide range of operating conditions. So, to keep system performance near its optimum, it is desirable to track the operating conditions and use updated parameters to compute control gains. A control scheme based on artificial neuro-fuzzy inference system (ANFIS), which is trained by the results of off-line studies obtained using particle swarm optimization, is proposed in this paper to optimize and update control gains in real-time according to load variations. Also, frequency relaxation is implemented using ANFIS. The efficiency of the proposed method is demonstrated via simulations. Compliance of the proposed method with NERC control performance standard is verified. (author)

  12. Hydraulic control of an automatic transmission

    Energy Technology Data Exchange (ETDEWEB)

    Oberhausen, A.

    1986-04-01

    Since the energy crysis took place it becomes very important to investigate the whole car concept in respect of fuel economy. As one of the steps Ford Transmission Engineering Cologne developed a new automatic 4-speed lock-up overdrive transmission which is called A4LD. The torque converter will be locked in 3rd and 4th gear. The 4th gear is designed as an overdrive gear with a ratio of 0.75:1 which reduces the engine speed by 25%. This report describes the main control items and the controlling of each gear.

  13. Automatic Control of Configuration of Web Anonymization

    Directory of Open Access Journals (Sweden)

    Tomas Sochor

    2013-01-01

    Full Text Available Anonymization of the Internet traffic usually hides details about the request originator from the target server. Such a disguise might be required in some situations, especially in the case of web browsing. Although the web traffic anonymization is not a part of the http specification, it could be achieved using a certain extra tool. Significant deceleration of anonymized traffic compared to normal traffic is inevitable but it can be controlled in some cases as this article suggests. The results presented here focus on measuring the parameters of such deceleration in terms of response time, transmission speed and latency and proposing the way how to control it. This study focuses on TOR primarily because recent studies have concluded that other tools (like I2P and JAP provide worse service. Sets of 14 file locations and 30 web pages have been formed and the latency, response time and transmission speed during the page or file download were measured repeatedly both with TOR active in various configurations and without TOR. The main result presented here comprises several ways how to improve the TOR anonymization efficiency and the proposal for its automatic control. In spite of the fact that efficiency still remains too low compared to normal web traffic for ordinary use, its automatic control could make TOR a useful tool in special cases.

  14. Automatic Control of ITER-like Structures

    International Nuclear Information System (INIS)

    In ITER Ion Cyclotron System requires a power transfer efficiency in excess of 90% from power source to plasma in quasi continuous operation. This implies the availability of a control system capable of optimizing the array radiation spectrum, automatically acquiring impedance match between the power source and the plasma loaded array at the beginning of the power pulse and maintaining it against load variations due to plasma position and plasma edge parameters fluctuations, rapidly detecting voltage breakdowns in the array and/or in the transmission system and reliably discriminating them from fast load variations. In this paper a proposal for a practical ITER control system, including power, phase, frequency and impedance matching is described. (authors)

  15. Control of automatic processes: A parallel distributed-processing model of the stroop effect. Technical report

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, J.D.; Dunbar, K.; McClelland, J.L.

    1988-06-16

    A growing body of evidence suggests that traditional views of automaticity are in need of revision. For example, automaticity has often been treated as an all-or-none phenomenon, and traditional theories have held that automatic processes are independent of attention. Yet recent empirial data suggests that automatic processes are continuous, and furthermore are subject to attentional control. In this paper we present a model of attention which addresses these issues. Using a parallel distributed processing framework we propose that the attributes of automaticity depend upon the strength of a process and that strength increases with training. Using the Stroop effect as an example, we show how automatic processes are continuous and emerge gradually with practice. Specifically, we present a computational model of the Stroop task which simulates the time course of processing as well as the effects of learning.

  16. 2nd International Conference on Mechatronics and Automatic Control

    CERN Document Server

    2015-01-01

    This book examines mechatronics and automatic control systems. The book covers important emerging topics in signal processing, control theory, sensors, mechanic manufacturing systems and automation. The book presents papers from the second International Conference on Mechatronics and Automatic Control Systems held in Beijing, China on September 20-21, 2014. Examines how to improve productivity through the latest advanced technologies Covering new systems and techniques in the broad field of mechatronics and automatic control systems.

  17. Discrete Model Reference Adaptive Control System for Automatic Profiling Machine

    OpenAIRE

    Peng Song; Guo-kai Xu; Xiu-chun Zhao

    2012-01-01

    Automatic profiling machine is a movement system that has a high degree of parameter variation and high frequency of transient process, and it requires an accurate control in time. In this paper, the discrete model reference adaptive control system of automatic profiling machine is discussed. Firstly, the model of automatic profiling machine is presented according to the parameters of DC motor. Then the design of the discrete model reference adaptive control is proposed, and the control rules...

  18. Automatic synthesis of sequential control schemes

    International Nuclear Information System (INIS)

    Of all hard- and software developed for industrial control purposes, the majority is devoted to sequential, or binary valued, control and only a minor part to classical linear control. Typically, the sequential parts of the controller are invoked during startup and shut-down to bring the system into its normal operating region and into some safe standby region, respectively. Despite its importance, fairly little theoretical research has been devoted to this area, and sequential control programs are therefore still created manually without much theoretical support to obtain a systematic approach. We propose a method to create sequential control programs automatically. The main ideas is to spend some effort off-line modelling the plant, and from this model generate the control strategy, that is the plan. The plant is modelled using action structures, thereby concentrating on the actions instead of the states of the plant. In general the planning problem shows exponential complexity in the number of state variables. However, by focusing on the actions, we can identify problem classes as well as algorithms such that the planning complexity is reduced to polynomial complexity. We prove that these algorithms are sound, i.e., the generated solution will solve the stated problem, and complete, i.e., if the algorithms fail, then no solution exists. The algorithms generate a plan as a set of actions and a partial order on this set specifying the execution order. The generated plant is proven to be minimal and maximally parallel. For a larger class of problems we propose a method to split the original problem into a number of simple problems that can each be solved using one of the presented algorithms. It is also shown how a plan can be translated into a GRAFCET chart, and to illustrate these ideas we have implemented a planing tool, i.e., a system that is able to automatically create control schemes. Such a tool can of course also be used on-line if it is fast enough. This

  19. AUTOMATIC CONTROL SYSTEM FOR TORQUE NATIONAL STANDARD

    Directory of Open Access Journals (Sweden)

    J. Galván-Mancilla

    2004-04-01

    Full Text Available The continuous development of the technology and the increase of its complexity demand wider measurementintervals, a greater exactness and a greater diversity of the standards used in order to establish the units ormeasuring systems. Torque metrology is of great importance and a magnitude is of common use for industry,technical development and research. The realization, quantification and dissemination of this magnitude are tasksassigned to the Metrology National Center (CENAM Torque Laboratory, in Mexico.For the dissemination of this magnitude the Torque National Standard relies on a system, which, in its originaldesign, was operated manually originating high consumption of man-hours in the development of a calibration.This work presents the standard automation and the benefits of the automatic control system.

  20. An electronically controlled automatic security access gate

    Directory of Open Access Journals (Sweden)

    Jonathan A. ENOKELA

    2014-11-01

    Full Text Available The security challenges being encountered in many places require electronic means of controlling access to communities, recreational centres, offices, and homes. The electronically controlled automated security access gate being proposed in this work helps to prevent an unwanted access to controlled environments. This is achieved mainly through the use of a Radio Frequency (RF transmitter-receiver pair. In the design a microcontroller is programmed to decode a given sequence of keys that is entered on a keypad and commands a transmitter module to send out this code as signal at a given radio frequency. Upon reception of this RF signal by the receiver module, another microcontroller activates a driver circuitry to operate the gate automatically. The codes for the microcontrollers were written in C language and were debugged and compiled using the KEIL Micro vision 4 integrated development environment. The resultant Hex files were programmed into the memories of the microcontrollers with the aid of a universal programmer. Software simulation was carried out using the Proteus Virtual System Modeling (VSM version 7.7. A scaled-down prototype of the system was built and tested. The electronically controlled automated security access gate can be useful in providing security for homes, organizations, and automobile terminals. The four-character password required to operate the gate gives the system an increased level of security. Due to its standalone nature of operation the system is cheaper to maintain in comparison with a manually operated type.

  1. 2013 International Conference on Mechatronics and Automatic Control Systems

    CERN Document Server

    2014-01-01

    This book examines mechatronics and automatic control systems. The book covers important emerging topics in signal processing, control theory, sensors, mechanic manufacturing systems and automation. The book presents papers from the 2013 International Conference on Mechatronics and Automatic Control Systems held in Hangzhou, China on August 10-11, 2013. .

  2. Automatic process control for the food industry: an introduction

    Science.gov (United States)

    In order to ensure food security in food manufacturing operations automatic process control is desired. With the operation of the automatic process control systems the deviation of the controlled variables from the standards can be consistently perceived, adjusted, and minimized to improve the proce...

  3. Fuzzy logic in automatic control devices

    International Nuclear Information System (INIS)

    Fuzzy logic is a theory that, applied to an automatic control device, allows to perform a regulation as efficiently as an operating expert could have done manually. The description of the behaviour of a regulation system implies the use of laws such as 'if...then', these laws link input variables that are 'conditions' to output variables that are 'conclusions'. In DAPNIA facilities fuzzy logic has been used to improve the performances of 3 control systems: -the regulation of the helium cycle compressor of a condenser, this regulation has required 21 laws, 4 conditions and 3 conclusions, -the regulation of the temperature of the LHC testing station at STCM, and -the regulation of the temperature of hydrogen target for the CLAS experiment, by means of fuzzy logic temperature stability has been driven from ±150 mK to ±20 mK, this regulation is based on 9 laws, 2 conditions and 2 conclusions. The application of fuzzy logic to regulation is presented on a simple example. (A.C.)

  4. The Interplay between Automatic and Control Processes in Reading.

    Science.gov (United States)

    Walczyk, Jeffrey J.

    2000-01-01

    Reviews prominent reading theories in light of their accounts of how automatic and control processes combine to produce successful text comprehension, and the trade-offs between the two. Presents the Compensatory-Encoding Model of reading, which explicates how, when, and why automatic and control processes interact. Notes important educational…

  5. Automatic presser-foot force control for industrial sewing machines

    OpenAIRE

    Carvalho, Helder; Silva, Luís F.; A. M. Rocha; Monteiro, João L.

    2012-01-01

    To develop and test control methods for real-time automatic presser-foot force control in industrial sewing machines. In this work, a closed-loop controller that controls presser-foot maximum vertical displacement is presented and compared to existing solutions that adjust force depending on sewing speed. Automatic force control can reduce problems such as stitch irregularity, stitch distortions and material damage, besides making material handling easier. Design/methodology/approach ...

  6. WIRELESS SENSOR NETWORK (WSN BASED AUTOMATIC FIRING PRACTICE SYSTEM (AFPS FOR TRAINING OF LAW ENFORCEMENT AGENCIES (LEAS

    Directory of Open Access Journals (Sweden)

    Imran Jattala

    2014-12-01

    Full Text Available The critical importance of an efficient infantryman in special operations force, tactical paramilitary and Law Enforcement Agencies (LEAs is insurmountable. One of the many vital aspects of an effective solider is excellent marksmanship which requires extensive training at sophisticated firing ranges. Modern firing ranges are supported by Automatic Firing Practice Systems (AFPS and this paper presents the design and development of such a system based on WSN. AFPS provide an automatic bullet-impact count during firing training session and is modular scalable in design for multiple of eight concurrent shooters. The system is versatile and flexible allowing for different small-arms and firing training modes and supports night firing exercise. AFPS comprises of two major components, the automatic target-box and a commander console. Automatic target-box has a motor & gear assembly, target sheet, bullet-impact sensor, control board, and WiFi communication module. Commander console is a ruggedized sunlight readable 10.4” Tablet PC, which with a built-in WiFi acts an access point. The automatic target-boxes equipped with embedded WiFi modules form sensor nodes of a WSN. The paper presents the complete System Development Life Cycle (SDLC of the firing practice system and associated WSN. The AFPS and bullet-impact sensor was extensively tested on Firing Ranges for accuracy of bullet-impact count. The results showed a bullet-impact count accuracy of over 97 percent.

  7. A method of automatic control procedures cardiopulmonary resuscitation

    Science.gov (United States)

    Bureev, A. Sh.; Zhdanov, D. S.; Kiseleva, E. Yu.; Kutsov, M. S.; Trifonov, A. Yu.

    2015-11-01

    The study is to present the results of works on creation of methods of automatic control procedures of cardiopulmonary resuscitation (CPR). A method of automatic control procedure of CPR by evaluating the acoustic data of the dynamics of blood flow in the bifurcation of carotid arteries and the dynamics of air flow in a trachea according to the current guidelines for CPR is presented. Evaluation of the patient is carried out by analyzing the respiratory noise and blood flow in the interspaces between the chest compressions and artificial pulmonary ventilation. The device operation algorithm of automatic control procedures of CPR and its block diagram has been developed.

  8. Uncertain Training Data Edition for Automatic Object-Based Change Map Extraction

    Science.gov (United States)

    Hajahmadi, S.; Mokhtarzadeh, M.; Mohammadzadeh, A.; Valadanzouj, M. J.

    2013-09-01

    Due to the rapid transformation of the societies, and the consequent growth of the cities, it is necessary to study these changes in order to achieve better control and management of urban areas and assist the decision-makers. Change detection involves the ability to quantify temporal effects using multi-temporal data sets. The available maps of the under study area is one of the most important sources for this reason. Although old data bases and maps are a great resource, it is more than likely that the training data extracted from them might contain errors, which affects the procedure of the classification; and as a result the process of the training sample editing is an essential matter. Due to the urban nature of the area studied and the problems caused in the pixel base methods, object-based classification is applied. To reach this, the image is segmented into 4 scale levels using a multi-resolution segmentation procedure. After obtaining the segments in required levels, training samples are extracted automatically using the existing old map. Due to the old nature of the map, these samples are uncertain containing wrong data. To handle this issue, an editing process is proposed according to K-nearest neighbour and k-means algorithms. Next, the image is classified in a multi-resolution object-based manner and the effects of training sample refinement are evaluated. As a final step this classified image is compared with the existing map and the changed areas are detected.

  9. Man-system interface based on automatic speech recognition: integration to a virtual control desk

    International Nuclear Information System (INIS)

    This work reports the implementation of a man-system interface based on automatic speech recognition, and its integration to a virtual nuclear power plant control desk. The later is aimed to reproduce a real control desk using virtual reality technology, for operator training and ergonomic evaluation purpose. An automatic speech recognition system was developed to serve as a new interface with users, substituting computer keyboard and mouse. They can operate this virtual control desk in front of a computer monitor or a projection screen through spoken commands. The automatic speech recognition interface developed is based on a well-known signal processing technique named cepstral analysis, and on artificial neural networks. The speech recognition interface is described, along with its integration with the virtual control desk, and results are presented. (author)

  10. Automatic training sample selection for a multi-evidence based crop classification approach

    DEFF Research Database (Denmark)

    Chellasamy, Menaka; Ferre, Ty; Greve, Mogens Humlekrog

    three Multi-Layer Perceptron (MLP) neural networks trained separately with spectral, texture and vegetation indices; classification labels were then assigned based on Endorsement Theory. The present study proposes an approach to feed this ensemble classifier with automatically selected training samples...

  11. Intelligent control schemes applied to Automatic Generation Control

    Directory of Open Access Journals (Sweden)

    Dingguo Chen

    2016-04-01

    Full Text Available Integrating ever increasing amount of renewable generating resources to interconnected power systems has created new challenges to the safety and reliability of today‟s power grids and posed new questions to be answered in the power system modeling, analysis and control. Automatic Generation Control (AGC must be extended to be able to accommodate the control of renewable generating assets. In addition, AGC is mandated to operate in accordance with the NERC‟s Control Performance Standard (CPS criteria, which represent a greater flexibility in relaxing the control of generating resources and yet assuring the stability and reliability of interconnected power systems when each balancing authority operates in full compliance. Enhancements in several aspects to the traditional AGC must be made in order to meet the aforementioned challenges. It is the intention of this paper to provide a systematic, mathematical formulation for AGC as a first attempt in the context of meeting the NERC CPS requirements and integrating renewable generating assets, which has not been seen reported in the literature to the best knowledge of the authors. Furthermore, this paper proposes neural network based predictive control schemes for AGC. The proposed controller is capable of handling complicated nonlinear dynamics in comparison with the conventional Proportional Integral (PI controller which is typically most effective to handle linear dynamics. The neural controller is designed in such a way that it has the capability of controlling the system generation in the relaxed manner so the ACE is controlled to a desired range instead of driving it to zero which would otherwise increase the control effort and cost; and most importantly the resulting system control performance meets the NERC CPS requirements and/or the NERC Balancing Authority’s ACE Limit (BAAL compliance requirements whichever are applicable.

  12. Heuristic programmation for ultrasonic automatic control

    International Nuclear Information System (INIS)

    A study concerning the automatic characterization of flaws is presented. During a first step where simplification was looked for, the use of an ultrasonic transducer with two degrees of freedom allowed the development of a new method of non destructive testing. Its scope has been illustrated by several tests. Extension prospects to 3-D testing have been investigated, and heuristic procedures have been applied in order to limit testing complexity, and to maintain duration within acceptable limits

  13. Training shortest-path tractography: Automatic learning of spatial priors

    DEFF Research Database (Denmark)

    Kasenburg, Niklas; Liptrot, Matthew George; Reislev, Nina Linde;

    2016-01-01

    Tractography is the standard tool for automatic delineation of white matter tracts from diffusion weighted images. However, the output of tractography often requires post-processing to remove false positives and ensure a robust delineation of the studied tract, and this demands expert prior...... knowledge. Here we demonstrate how such prior knowledge, or indeed any prior spatial information, can be automatically incorporated into a shortest-path tractography approach to produce more robust results. We describe how such a prior can be automatically generated (learned) from a population, and we...... demonstrate that our framework also retains support for conventional interactive constraints such as waypoint regions. We apply our approach to the open access, high quality Human Connectome Project data, as well as a dataset acquired on a typical clinical scanner. Our results show that the use of a learned...

  14. Fuzzy Logic Controller for Automatic Nuclear Power Plant

    International Nuclear Information System (INIS)

    Reactor output power stabilization is the desired goal for any reactor. During the operation of the reactor, different changes in its operating conditions occur.Therefore, an automatic reactor power control is required to compensate the reactivity changes. To achieve the optimal stabilization of reactor output power, Proportional-Integral-Derivative (PID) and Fuzzy Logic Controller (FLC) approaches are developed. Evaluation of each approach is discussed. A developed reactor power plant model is suggested to analyze and compare PID and FLC controller approaches. The simulation results show that FLC controller is a good approach for automatic reactor output power control

  15. Training shortest-path tractography: Automatic learning of spatial priors.

    Science.gov (United States)

    Kasenburg, Niklas; Liptrot, Matthew; Reislev, Nina Linde; Ørting, Silas N; Nielsen, Mads; Garde, Ellen; Feragen, Aasa

    2016-04-15

    Tractography is the standard tool for automatic delineation of white matter tracts from diffusion weighted images. However, the output of tractography often requires post-processing to remove false positives and ensure a robust delineation of the studied tract, and this demands expert prior knowledge. Here we demonstrate how such prior knowledge, or indeed any prior spatial information, can be automatically incorporated into a shortest-path tractography approach to produce more robust results. We describe how such a prior can be automatically generated (learned) from a population, and we demonstrate that our framework also retains support for conventional interactive constraints such as waypoint regions. We apply our approach to the open access, high quality Human Connectome Project data, as well as a dataset acquired on a typical clinical scanner. Our results show that the use of a learned prior substantially increases the overlap of tractography output with a reference atlas on both populations, and this is confirmed by visual inspection. Furthermore, we demonstrate how a prior learned on the high quality dataset significantly increases the overlap with the reference for the more typical yet lower quality data acquired on a clinical scanner. We hope that such automatic incorporation of prior knowledge and the obviation of expert interactive tract delineation on every subject, will improve the feasibility of large clinical tractography studies. PMID:26804779

  16. Radiological control technician: Training program management manual

    International Nuclear Information System (INIS)

    This manual defines and describes the DOE Radiological Control Technician Core Training Program qualification and training process, material development requirements, standards and policies, and administration. The manual applies to Radiological Control Technician Training Programs at all DOE contractor sites

  17. Control of automatic processes: A parallel distributed-processing account of the Stroop effect. Technical report

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, J.D.; Dunbar, K.; McClelland, J.L.

    1989-11-22

    A growing body of evidence suggests that traditional views of automaticity are in need of revision. For example, automaticity has often been treated as an all-or-none phenomenon, and traditional theories have held that automatic processes are independent of attention. Yet recent empirical data suggest that automatic processes are continuous, and furthermore are subject to attentional control. In this paper we present a model of attention which addresses these issues. Using a parallel distributed processing framework we propose that the attributes of automaticity depend upon the strength of a processing pathway and that strength increases with training. Using the Stroop effect as an example, we show how automatic processes are continuous and emerge gradually with practice. Specifically, we present a computational model of the Stroop task which simulates the time course of processing as well as the effects of learning. This was accomplished by combining the cascade mechanism described by McClelland (1979) with the back propagation learning algorithm (Rumelhart, Hinton, Williams, 1986). The model is able to simulate performance in the standard Stroop task, as well as aspects of performance in variants of this task which manipulate SOA, response set, and degree of practice. In the discussion we contrast our model with other models, and indicate how it relates to many of the central issues in the literature on attention, automaticity, and interference.

  18. Training-induced behavioral and brain plasticity in inhibitory control

    Directory of Open Access Journals (Sweden)

    Lucas eSpierer

    2013-08-01

    Full Text Available Deficits in inhibitory control, the ability to suppress ongoing or planned motor or cognitive processes, contribute to many psychiatric and neurological disorders. The rehabilitation of inhibition-related disorders may therefore benefit from neuroplasticity-based training protocols aiming at normalizing inhibitory control proficiency and the underlying brain networks. Current literature on training-induced behavioral and brain plasticity in inhibitory control suggests that improvements may follow either from the development of automatic forms of inhibition or from the strengthening of top-down, controlled inhibition. Automatic inhibition develops in conditions of consistent and repeated associations between inhibition-triggering stimuli and stopping goals. Once established, the stop signals directly elicit inhibition, thereby bypassing slow, top-down executive control and accelerating stopping processes. In contrast, training regimens involving varying stimulus-response associations or frequent inhibition failures prevent the development of automatic inhibition and thus strengthen top-down inhibitory processes rather than bottom-up ones. We discuss these findings in terms of developing optimal inhibitory control training regimens for rehabilitation purposes.

  19. General collaboration offer of Johnson Controls regarding the performance of air conditioning automatic control systems and other buildings` automatic control systems

    Energy Technology Data Exchange (ETDEWEB)

    Gniazdowski, J.

    1995-12-31

    JOHNSON CONTROLS manufactures measuring and control equipment (800 types) and is as well a {open_quotes}turn-key{close_quotes} supplier of complete automatic controls systems for heating, air conditioning, ventilation and refrigerating engineering branches. The Company also supplies Buildings` Computer-Based Supervision and Monitoring Systems that may be applied in both small and large structures. Since 1990 the company has been performing full-range trade and contracting activities on the Polish market. We have our own well-trained technical staff and we collaborate with a series of designing and contracting enterprises that enable us to have our projects carried out all over Poland. The prices of our supplies and services correspond with the level of the Polish market.

  20. Automatic power control for a pressurized water reactor

    International Nuclear Information System (INIS)

    During a normal operation of a pressurized water reactor (PWR), the reactivity is controlled by control rods, boron, and the average temperature of the primary coolant. Especially in load follow operation, the reactivity change is induced by changes in power level and effects of xenon concentration. The control of the core power distribution is concerned, mainly, with the axial power distribution which depends on insertion and withdrawal of the control rods resulting in additional reactivity compensation. The utilization of part strength control element assemblies (PSCEAs) is quite appropriate for a control of the power distribution in the case of Yonggwang Nuclear Unit 3 (YGN Unit 3). However, control of the PSCEAs is not automatic, and changes in the boron concentration by dilution/boration are done manually. Thus, manual control of the PSCEAs and the boron concentration require the operator's experience and knowledge for a successful load follow operation. In this thesis, the new concepts have been proposed to adapt for an automatic power control in a PWR. One of the new concepts is the mode K control, another is a fuzzy power control. The system in mode K control implements a heavy-worth bank dedicated to axial shape control, independent of the existing regulating banks. The heavy bank provides a monotonic relationship between its motion and the axial power shape change, which allows automatic control of the axial power distribution. And the mode K enables precise regulation, by using double closed-loop control of the reactor coolant temperature and the axial power difference. Automatic reactor power control permits the nuclear power plant to accommodate the load follow operations, including frequency control, to respond to the grid requirements. The mode K reactor control concepts were tested using simulation responses of a Korean standardized 1000-MWe PWR which is a reference plant for the YGN Unit 3. The simulation results illustrate that the mode K would be

  1. Automatic combustion control system for coke oven battery

    Energy Technology Data Exchange (ETDEWEB)

    Kasaoka, S.; Terazono, K.; Hashimoto, K.; Matsuda, H.

    1984-01-01

    This paper outlines an automatic coke battery temperature control system. The temperature sensors used, their number and location are described. There are three control systems: the combustion control system, temperature detection and heat control system, and the air volume and excess air-ratio control. The system for setting the battery temperature is also described. The overall system has achieved substantial reduction in coking heat consumption. 3 references.

  2. A Diffractometer Control System with Automatic UB-matrix Refinement

    International Nuclear Information System (INIS)

    A four-axes diffractometer control system with automatic UB-matrix refinement has been developed. The system automatically scans and finds peak positions after specifying a set of indexes, then the system calculates the UB-martix. Combining with continuous scan, the control system reduces a UB-matrix determination time. The system was developed based on a message exchanging control framework. Users can control not only a diffractometer but also other components like a monochromator and an insertion device using man-readable abstract messages. Therefore users easily develop programs for their experiments. Results of test measurements at the beamline BL46XU of the SPring-8 indicate that the automatic UB-matrix refinement is working well, and it reduces the refinement time of the UB-matrix about one fourth

  3. Evolutionary game dynamics of controlled and automatic decision-making

    Science.gov (United States)

    Toupo, Danielle F. P.; Strogatz, Steven H.; Cohen, Jonathan D.; Rand, David G.

    2015-07-01

    We integrate dual-process theories of human cognition with evolutionary game theory to study the evolution of automatic and controlled decision-making processes. We introduce a model in which agents who make decisions using either automatic or controlled processing compete with each other for survival. Agents using automatic processing act quickly and so are more likely to acquire resources, but agents using controlled processing are better planners and so make more effective use of the resources they have. Using the replicator equation, we characterize the conditions under which automatic or controlled agents dominate, when coexistence is possible and when bistability occurs. We then extend the replicator equation to consider feedback between the state of the population and the environment. Under conditions in which having a greater proportion of controlled agents either enriches the environment or enhances the competitive advantage of automatic agents, we find that limit cycles can occur, leading to persistent oscillations in the population dynamics. Critically, however, these limit cycles only emerge when feedback occurs on a sufficiently long time scale. Our results shed light on the connection between evolution and human cognition and suggest necessary conditions for the rise and fall of rationality.

  4. Automatic Voltage Control (AVC) System under Uncertainty from Wind Power

    DEFF Research Database (Denmark)

    Qin, Nan; Abildgaard, Hans; Flynn, Damian; Rather, Zakir Hussain; Bak, Claus Leth; Chen, Zhe

    2016-01-01

    An automatic voltage control (AVC) system maintains the voltage profile of a power system in an acceptable range and minimizes the operational cost by coordinating the regulation of controllable components. Typically, all of the parameters in the optimization problem are assumed to be certain and...

  5. Automatic control system design of laser interferometer

    Science.gov (United States)

    Lu, Qingjie; Li, Chunjie; Sun, Hao; Ren, Shaohua; Han, Sen

    2015-10-01

    There are a lot of shortcomings with traditional optical adjustment in interferometry, such as low accuracy, time-consuming, labor-intensive, uncontrollability, and bad repetitiveness, so we treat the problem by using wireless remote control system. Comparing to the traditional method, the effect of vibration and air turbulence will be avoided. In addition the system has some peculiarities of low cost, high reliability and easy operation etc. Furthermore, the switching between two charge coupled devices (CCDs) can be easily achieved with this wireless remote control system, which is used to collect different images. The wireless transmission is achieved by using Radio Frequency (RF) module and programming the controller, pulse width modulation (PWM) of direct current (DC) motor, real-time switching of relay and high-accuracy displacement control of FAULHABER motor are available. The results of verification test show that the control system has good stability with less than 5% packet loss rate, high control accuracy and millisecond response speed.

  6. An electronically controlled automatic security access gate

    OpenAIRE

    Jonathan A. Enokela; Michael N. TYOWUAH

    2014-01-01

    The security challenges being encountered in many places require electronic means of controlling access to communities, recreational centres, offices, and homes. The electronically controlled automated security access gate being proposed in this work helps to prevent an unwanted access to controlled environments. This is achieved mainly through the use of a Radio Frequency (RF) transmitter-receiver pair. In the design a microcontroller is programmed to decode a given sequence of keys that is ...

  7. Modular system for automatic control of buildings

    OpenAIRE

    Tavčar, Marko

    2015-01-01

    In this thesis, we are going to describe a modular system for control of buildings with a wide variety of actuators. We will primarily focus on control of lamps and motor shades, and add general support for all sorts of sensors too. Human-machine interface consist of mobile application for operating systems Android, which connects to the control system. We are going to present and explain the system architecture including the description of the hardware and software solutions. We designed the...

  8. BladePro: 3D Automatic Grade Control System

    OpenAIRE

    ECT Team, Purdue

    2007-01-01

    Currently most of the methods to control grading equipment to achieve the required production accuracy are based on conventional surveying, such as grade stakes and stringlines. BladePro System, developed by Spectra Precision in 1998, is a dual automatic blade control system that uses advance computer technology and user friendly operator controls. This system provides contractors a three dimensional machine control system for roads, railway beds and airport runway construction.

  9. Automatic filament warm-up controller

    Science.gov (United States)

    Mccluskey, J.; Daeges, J.

    1979-01-01

    As part of the unattended operations objective of the Deep Space Network deep space stations, this filament controller serves as a step between manual operation of the station and complete computer control. Formerly, the operator was required to devote five to fifteen minutes of his time just to properly warm up the filaments on the klystrons of the high power transmitters. The filament controller reduces the operator's duty to a one-step command and is future-compatible with various forms of computer control.

  10. Automatic control rod programming for boiling water reactors

    International Nuclear Information System (INIS)

    The objective of long-term control rod programming is to develop a sequence of exposure-dependent control rod patterns that assure the safe and efficient depletion of the nuclear fuel for the duration of the cycle. A two step method was effected in the code OCTOPUS to perform this task automatically for the Pennsylvania and Power Light Co.' BWRs. Although the execution of OCTOPUS provides good or satisfactory results, its input and execution mode has been improved by making it more user friendly and automatic. (authors)

  11. 5th International Conference on Electrical Engineering and Automatic Control

    CERN Document Server

    Yao, Yufeng

    2016-01-01

    On the basis of instrument electrical and automatic control system, the 5th International Conference on Electrical Engineering and Automatic Control (CEEAC) was established at the crossroads of information technology and control technology, and seeks to effectively apply information technology to a sweeping trend that views control as the core of intelligent manufacturing and life. This book takes a look forward into advanced manufacturing development, an area shaped by intelligent manufacturing. It highlights the application and promotion of process control represented by traditional industries, such as the steel industry and petrochemical industry; the technical equipment and system cooperative control represented by robot technology and multi-axis CNC; and the control and support of emerging process technologies represented by laser melting and stacking, as well as the emerging industry represented by sustainable and intelligent life. The book places particular emphasis on the micro-segments field, such as...

  12. Automatic control of clock duty cycle

    Science.gov (United States)

    Feng, Xiaoxin (Inventor); Roper, Weston (Inventor); Seefeldt, James D. (Inventor)

    2010-01-01

    In general, this disclosure is directed to a duty cycle correction (DCC) circuit that adjusts a falling edge of a clock signal to achieve a desired duty cycle. In some examples, the DCC circuit may generate a pulse in response to a falling edge of an input clock signal, delay the pulse based on a control voltage, adjust the falling edge of the input clock signal based on the delayed pulse to produce an output clock signal, and adjust the control voltage based on the difference between a duty cycle of the output clock signal and a desired duty cycle. Since the DCC circuit adjusts the falling edge of the clock cycle to achieve a desired duty cycle, the DCC may be incorporated into existing PLL control loops that adjust the rising edge of a clock signal without interfering with the operation of such PLL control loops.

  13. Integration of mapped RNA-Seq reads into automatic training of eukaryotic gene finding algorithm.

    Science.gov (United States)

    Lomsadze, Alexandre; Burns, Paul D; Borodovsky, Mark

    2014-09-01

    We present a new approach to automatic training of a eukaryotic ab initio gene finding algorithm. With the advent of Next-Generation Sequencing, automatic training has become paramount, allowing genome annotation pipelines to keep pace with the speed of genome sequencing. Earlier we developed GeneMark-ES, currently the only gene finding algorithm for eukaryotic genomes that performs automatic training in unsupervised ab initio mode. The new algorithm, GeneMark-ET augments GeneMark-ES with a novel method that integrates RNA-Seq read alignments into the self-training procedure. Use of 'assembled' RNA-Seq transcripts is far from trivial; significant error rate of assembly was revealed in recent assessments. We demonstrated in computational experiments that the proposed method of incorporation of 'unassembled' RNA-Seq reads improves the accuracy of gene prediction; particularly, for the 1.3 GB genome of Aedes aegypti the mean value of prediction Sensitivity and Specificity at the gene level increased over GeneMark-ES by 24.5%. In the current surge of genomic data when the need for accurate sequence annotation is higher than ever, GeneMark-ET will be a valuable addition to the narrow arsenal of automatic gene prediction tools. PMID:24990371

  14. A wide range and high speed automatic gain control

    International Nuclear Information System (INIS)

    Automatic gain control (AGC) techniques have been largely used since the beginning of electronics, but in most of the applications the dynamic response is slow compared with the carrier frequency. The problem of developing an automatic gain control with high dynamic response and wide control range simultaneously is analyzed in this work. An ideal gain control law, with the property that the total loop gain remains constant independent of the carrier amplitude, is obtained. The resulting AGC behavior is compared by computer simulations with a linear multiplier AGC. The ideal gain control law can be approximated using a transconductance amplifier. A practical circuit that has been used at CERN in the radio frequency loops of the Booster Synchrotron is presented. The circuit has high speed and 80-dB gain control range

  15. Development of Automatic Remote Exposure Controller for Gamma Radiography

    Energy Technology Data Exchange (ETDEWEB)

    Joo, Gwang Tae; Shin, Jin Seong; Kim, Dong Eun; Song, Jung Ho; Choo, Seung Hwan; Chang, Hong Keun [Korea Industrial Testing Co., Ltd., Seoul (Korea, Republic of)

    2002-10-15

    Recently, gamma radiographic equipment have been used about 1,000 sets manually and operated by about 2,500 persons in Korea. In order for a radiography to work effectively with avoiding any hazard of the high level radiation from the source, many field workers have expected developing a wireless automatic remote exposure controller. The KlTCO research team has developed an automatic remote exposure controller that can regulate the speed of 0.4{approx}1.2m/s by BLDC motor of 24V 200W which has output of 54 kgf{center_dot}, suitable torque and safety factor for the work. And the developed automatic remote exposure controller can control rpm of motor, pigtail position by photo-sensor and exposure time by timer to RF sensor. Thus, the developed equipment is expected that the unit can be used in many practical applications with benefits in economical advantage to combine the use of both automatic and manual type because attachment is possible existent manual remote exposure controller, AC and DC combined use

  16. Development of Automatic Remote Exposure Controller for Gamma Radiography

    International Nuclear Information System (INIS)

    Recently, gamma radiographic equipment have been used about 1,000 sets manually and operated by about 2,500 persons in Korea. In order for a radiography to work effectively with avoiding any hazard of the high level radiation from the source, many field workers have expected developing a wireless automatic remote exposure controller. The KlTCO research team has developed an automatic remote exposure controller that can regulate the speed of 0.4∼1.2m/s by BLDC motor of 24V 200W which has output of 54 kgf·, suitable torque and safety factor for the work. And the developed automatic remote exposure controller can control rpm of motor, pigtail position by photo-sensor and exposure time by timer to RF sensor. Thus, the developed equipment is expected that the unit can be used in many practical applications with benefits in economical advantage to combine the use of both automatic and manual type because attachment is possible existent manual remote exposure controller, AC and DC combined use

  17. Nonlinear model predictive control using automatic differentiation

    OpenAIRE

    Al Seyab, Rihab Khalid Shakir

    2006-01-01

    Although nonlinear model predictive control (NMPC) might be the best choice for a nonlinear plant, it is still not widely used. This is mainly due to the computational burden associated with solving online a set of nonlinear differential equations and a nonlinear dynamic optimization problem in real time. This thesis is concerned with strategies aimed at reducing the computational burden involved in different stages of the NMPC such as optimization problem, state estimation, an...

  18. Simulation of the TREAT-Upgrade Automatic Reactor Control System

    International Nuclear Information System (INIS)

    This paper describes the design of the Automatic Reactor Control System (ARCS) for the Transient Reactor Test Facility (TREAT) Upgrade. A simulation was used to facilitate the ARCS design and to completely test and verify its operation before installation at the TREAT facility

  19. Automatic gain controller for industrial nuclear instrument using scintillation detector

    International Nuclear Information System (INIS)

    The design of a gamma measurement system using NaI(Tl) scintillation detector with a feedback loop for working in very large variation of environmental conditions is presented. The automatic gain controller (AGC) module is applied in a loop from output of spectroscopic amplifier to the high voltage supply module and get temperature stability well. (BPK)

  20. Evaluation of an automatic exposure control device for mobile radiography

    International Nuclear Information System (INIS)

    The mobil-AID automatic exposure control device was evaluated quantitatively and clinically for use with mobile radiographic units. It was found that such a device can improve the consistency and quality of mobile radiographs and also reduce the retake rate. Problems in calibration and clinical use are discussed

  1. Towards automatic model based controller design for reconfigurable plants

    DEFF Research Database (Denmark)

    Michelsen, Axel Gottlieb; Stoustrup, Jakob; Izadi-Zamanabadi, Roozbeh

    2008-01-01

    This paper introduces model-based Plug and Play Process Control, a novel concept for process control, which allows a model-based control system to be reconfigured when a sensor or an actuator is plugged into a controlled process. The work reported in this paper focuses on composing a monolithic...... model from models of a process to be controlled and the actuators and sensors connected to the process, and propagation of tuning criteria from these sub-models, thereby accommodating automatic controller synthesis using existing methods. The developed method is successfully tested on an industrial case...

  2. An Automatic Identification Procedure to Promote the use of FES-Cycling Training for Hemiparetic Patients

    Directory of Open Access Journals (Sweden)

    Emilia Ambrosini

    2014-01-01

    Full Text Available Cycling induced by Functional Electrical Stimulation (FES training currently requires a manual setting of different parameters, which is a time-consuming and scarcely repeatable procedure. We proposed an automatic procedure for setting session-specific parameters optimized for hemiparetic patients. This procedure consisted of the identification of the stimulation strategy as the angular ranges during which FES drove the motion, the comparison between the identified strategy and the physiological muscular activation strategy, and the setting of the pulse amplitude and duration of each stimulated muscle. Preliminary trials on 10 healthy volunteers helped define the procedure. Feasibility tests on 8 hemiparetic patients (5 stroke, 3 traumatic brain injury were performed. The procedure maximized the motor output within the tolerance constraint, identified a biomimetic strategy in 6 patients, and always lasted less than 5 minutes. Its reasonable duration and automatic nature make the procedure usable at the beginning of every training session, potentially enhancing the performance of FES-cycling training.

  3. Controlled versus Automatic Processes: Which Is Dominant to Safety? The Moderating Effect of Inhibitory Control

    OpenAIRE

    Yaoshan Xu; Yongjuan Li; Weidong Ding; Fan Lu

    2014-01-01

    This study explores the precursors of employees' safety behaviors based on a dual-process model, which suggests that human behaviors are determined by both controlled and automatic cognitive processes. Employees' responses to a self-reported survey on safety attitudes capture their controlled cognitive process, while the automatic association concerning safety measured by an Implicit Association Test (IAT) reflects employees' automatic cognitive processes about safety. In addition, this study...

  4. AUTOMATIC RETINA EXUDATES SEGMENTATION WITHOUT A MANUALLY LABELLED TRAINING SET

    Energy Technology Data Exchange (ETDEWEB)

    Giancardo, Luca [ORNL; Meriaudeau, Fabrice [ORNL; Karnowski, Thomas Paul [ORNL; Li, Yaquin [University of Tennessee, Knoxville (UTK); Tobin Jr, Kenneth William [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK)

    2011-01-01

    Diabetic macular edema (DME) is a common vision threatening complication of diabetic retinopathy which can be assessed by detecting exudates (a type of bright lesion) in fundus images. In this work, two new methods for the detection of exudates are presented which do not use a supervised learning step and therefore do not require ground-truthed lesion training sets which are time consuming to create, difficult to obtain, and prone to human error. We introduce a new dataset of fundus images from various ethnic groups and levels of DME which we have made publicly available. We evaluate our algorithm with this dataset and compare our results with two recent exudate segmentation algorithms. In all of our tests, our algorithms perform better or comparable with an order of magnitude reduction in computational time.

  5. Declarative camera control for automatic cinematography

    Energy Technology Data Exchange (ETDEWEB)

    Christianson, D.B.; Anderson, S.E.; Li-wei He [Univ. of Washington, Seattle, WA (United States)] [and others

    1996-12-31

    Animations generated by interactive 3D computer graphics applications are typically portrayed either from a particular character`s point of view or from a small set of strategically-placed viewpoints. By ignoring camera placement, such applications fail to realize important storytelling capabilities that have been explored by cinematographers for many years. In this paper, we describe several of the principles of cinematography and show how they can be formalized into a declarative language, called the Declarative Camera Control Language (DCCL). We describe the application of DCCL within the context of a simple interactive video game and argue that DCCL represents cinematic knowledge at the same level of abstraction as expert directors by encoding 16 idioms from a film textbook. These idioms produce compelling animations, as demonstrated on the accompanying videotape.

  6. Discussion on movement skill automatization and training%简述动作技能自动化与训练

    Institute of Scientific and Technical Information of China (English)

    李雪

    2011-01-01

    Movement skill automatization make individual complete correlative movements without the participation of special awareness and control,thereby reduce the psychological resource consumption in movement skill operation.Movement skill automatization can help individual to strengthen the feed back function of kinaesthesia with formed movement chart and maintain natural operation level under the disadvantaged condition with nice clue.Overtraining and effective development of actual and timely feed back are the problems should be paid attention during movement skill automatization training.On the psychological training of movement skill automatization,especially the idea essence of presentation training method,effective implementation in practice is the present hotspot in this field.%动作技能自动化使个体在无需特殊意识参与和控制下,协调有序地完成相关动作序列,从而降低动作技能操作中的心理资源消耗。动作技能自动化有助于个体凭借自身已形成的运动程序图式,加强动觉反馈的作用,并能利用细微的线索,在不利条件下维持正常的操作水平。"过度练习"及具体及时反馈的有效开展都是动作技能自动化训练中需要注意的问题。关于动作技能自动化的心理训练,尤其是表象训练法的理念精髓在实践中的有效的贯彻是目前该领域研究的热点。

  7. Randomized algorithms in automatic control and data mining

    CERN Document Server

    Granichin, Oleg; Toledano-Kitai, Dvora

    2015-01-01

    In the fields of data mining and control, the huge amount of unstructured data and the presence of uncertainty in system descriptions have always been critical issues. The book Randomized Algorithms in Automatic Control and Data Mining introduces the readers to the fundamentals of randomized algorithm applications in data mining (especially clustering) and in automatic control synthesis. The methods proposed in this book guarantee that the computational complexity of classical algorithms and the conservativeness of standard robust control techniques will be reduced. It is shown that when a problem requires "brute force" in selecting among options, algorithms based on random selection of alternatives offer good results with certain probability for a restricted time and significantly reduce the volume of operations.

  8. 75 FR 59108 - Positive Train Control Systems

    Science.gov (United States)

    2010-09-27

    ... Federal Railroad Administration 49 CFR Part 236 RIN 2130-AC03 Positive Train Control Systems AGENCY..., and use of Positive Train Control (PTC) systems for railroads as mandated by the Rail Safety... Safety Assurance and Compliance, Staff Director, Signal & Train Control Division, Federal...

  9. 76 FR 63899 - Positive Train Control Systems

    Science.gov (United States)

    2011-10-14

    ... Federal Railroad Administration 49 CFR Part 236 RIN 2130-AC27 Positive Train Control Systems AGENCY... meet certain risk-based criteria in order to avoid positive train control (PTC) system implementation... Safety Assurance and Compliance, Staff Director, Signal & Train Control Division, Federal...

  10. Facilitator control as automatic behavior: A verbal behavior analysis

    OpenAIRE

    Hall, Genae A.

    1993-01-01

    Several studies of facilitated communication have demonstrated that the facilitators were controlling and directing the typing, although they appeared to be unaware of doing so. Such results shift the focus of analysis to the facilitator's behavior and raise questions regarding the controlling variables for that behavior. This paper analyzes facilitator behavior as an instance of automatic verbal behavior, from the perspective of Skinner's (1957) book Verbal Behavior. Verbal behavior is autom...

  11. Automatic control of paint spray booth with integrated dryer

    OpenAIRE

    Živec, Marko

    2016-01-01

    The thesis presents a solution for automatic control of a paint spray booth with integrated dryer. The conditions in the booth must be as constant as possible to assure better quality of surface coating applied on a particular object, while also lowering the consumption of energy sources and improving the working environment. The thesis includes descriptions of physical elements used for control and regulation, the software solution, which includes algorithms for the regulation of the tempera...

  12. An automatic control system for a power-generating unit

    Energy Technology Data Exchange (ETDEWEB)

    Itelman, U.R.; Mankin, M.N.; Mikhailova, I.V.

    1979-02-05

    There exists an automatic control system for a power-generating unit, which contains a load regulator for the turbine, which is connected to the output of the actuator valve servo motor together with the slide valve of the regulator measuring channel, a boiler productivity regulator and a frequency-compensation unit for controlling the input power; the output from this unit is connected to the input to the turbine load regulator and the boiler productivity regulator. In this automatic control system, the compensation unit is manufactured in the form of a frequency deviation sensor connected to the voltage transformer of the generator--it is a complex electronic and conversion component. In order to simplify this design of the compensation unit, it is manufactured as a motion sensor, which is mechanically connected to the slide valve. This connection is made through the slide box of the valve or through the valve position rod.

  13. 2011 International Conference in Electrics, Communication and Automatic Control Proceedings

    CERN Document Server

    2012-01-01

    This two-volume set contains the very latest, cutting-edge material in electrics, communication and automatic control. As a vital field of research that is highly relevant to current developments in a number of technological domains, the subjects it covers include micro-electronics and integrated circuit control, signal processing technology, next-generation network infrastructure, wireless communication and scientific instruments. The aim of the International Conference in Electrics, Communication and Automatic Control, held in Chongqing, China, in June 2011 was to provide a valuable inclusive platform for researchers, engineers, academicians and industrial professionals from all over the world to share their research results with fellow scientists in the sector. The call for papers netted well over 600 submissions, of which 224 were selected for presentation. This fully peer-reviewed collection of papers from the conference can be viewed as a single-source compendium of the latest trends and techniques in t...

  14. Evaluation of automatic face recognition for automatic border control on actual data recorded of travellers at Schiphol Airport

    NARCIS (Netherlands)

    Spreeuwers, L.J.; Hendrikse, A.J.; Gerritsen, K.J.; Brömme, A.; Busch, C.

    2012-01-01

    Automatic border control at airports using automated facial recognition for checking the passport is becoming more and more common. A problem is that it is not clear how reliable these automatic gates are. Very few independent studies exist that assess the reliability of automated facial recognition

  15. INTELLIGENT FATIGUE DETECTION AND AUTOMATIC VEHICLE CONTROL SYSTEM

    Directory of Open Access Journals (Sweden)

    Monali Gulhane

    2014-10-01

    Full Text Available This paper describes method for detecting the early signs of fatigue in train drivers. As soon as the train driver is falling in symptoms of fatigue immediate message will be transfer to the control room indicating the status of the drivers. In addition of the advance technology of heart rate sensors is also added in the system for correct detection of status of driver if in either case driver is falling to fatigue due to any sever medical problems .The fatigue is detected in the system by the image processing method of comparing the image(frames in the video and by using the human features we are able to estimate the indirect way of detecting fatigue. The technique also focuses on modes of person when driving the train i.e. awake, drowsy state or sleepy and sleep state. The system is very efficient to detect the fatigue and control the train also train can be controlled if it cross any such signal by which the train may collide on another train

  16. Tracking control mechanisms for positioning automatic CRD exchanger

    International Nuclear Information System (INIS)

    Purpose: To enable completely automatic positioning for the automatic CRD (control rod drives) exchanger, as well as shorten the time for the exchanging operation and save the operator's labour. Constitution: Images of a target attached to the lower flange face of CRD are picked up by a fiber scope mounted to a mounting head. The images are converted through I.T.V. into electrical signals, passed through a cable and then sent to a pattern recognition mechanism. The position for the images of the target is calculated and the calculated position is sent to a drive control section, where the position for the images of the target is compared with a reference position for the images (exactly aligned position) and the moving amount of the mounting head is calculated to move the driving section and thereby complete the positioning. (Kawakami, Y.)

  17. Automatic technological control system of the Kolsk NPP Unit-1

    International Nuclear Information System (INIS)

    Reconstruction of the present centralized control system with application of a new small SM2-9 computer and reactor control system ''Jailyk'' is started at the Kolsk NPP (KNPP). Presented are the flowsheet of the technological process automatic control system (TRACS) of the KNPP first generation after reconstruction, by stage diagram conducting organizational-technical measures on the TP ACS reconstruction and communication flowsheet of the IV-500 MA information subsystem with the SM2-9 computer. The TP ACS reconstruction will make it possible to obtain the unit power up to 115% from the nominal one

  18. Automatic Control and Its Means in Mechatronics and Robotics

    Czech Academy of Sciences Publication Activity Database

    Belda, Květoslav

    Budapest: SZTAKI, Computer and Automation Research Institute, 2007, s. 4-9. ISBN 978-963-311-365-3. [8th International PhD Workshop on Systems and Control a Young Generation Viewpoint. Balatonfured (HU), 16.09.2007-20.09.2007] R&D Projects: GA MŠk 1M0572; GA ČR(CZ) GA102/05/0271; GA ČR GP102/06/P275 Institutional research plan: CEZ:AV0Z10750506 Keywords : Automatic control * Mechatronics * Robotics Subject RIV: BC - Control Systems Theory http://library.utia.cas.cz/separaty/historie/belda-0093217.pdf

  19. Automatic Tuning of the Superheat Controller in a Refrigeration Plant

    DEFF Research Database (Denmark)

    Rasmussen, Henrik; Thybo, Claus; Larsen, Lars F. S.

    2006-01-01

    This paper proposes an automatic tuning of the superheat control in a refrigeration system using a relay method. By means of a simple evaporator model that captures the important dynamics and non-linearities of the superheat a gain-scheduling that compensates for the variation of the process gain...... can be obtained from tuning in only one operation point. The proposed method is validated by experimental results....

  20. The CDIO Initiative from an Automatic Control Project Course Perspective

    OpenAIRE

    Enqvist, Martin; Gunnarsson, Svante; Norrlöf, Mikael; Wernholt, Erik; Hansson, Anders

    2004-01-01

    The CDIO (Conceive Design Implement Operate) Initiative is explained, and some of the results at the Applied Physics and Electrical Engineering program at Linköping University, Sweden, are presented. A project course in Automatic Control is used as an example. The projects within the course are carried out using the LIPS (Linköping interactive project steering) model. An example of a project, the golf playing industrial robot, and the results from this project are also covered.

  1. Automatic vehicle parking using an evolution-obtained neural controller

    OpenAIRE

    Ronchetti, Franco; Lanzarini, Laura Cristina

    2011-01-01

    Within the problems that can be solved with autonomous robots, automatic parking is an area of great interest, since it presents a complex scenario where the agent must go through a series of obstacles to reach its goal. Existing solutions usually require some kind of external mark for monitoring or global vision that indicates where the agent is at a given time. This article presents an evolutionary strategy to generate a robotic controller based on a neural network that successfully solves ...

  2. Method for automatic control rod operation using rule-based control

    International Nuclear Information System (INIS)

    An automatic control rod operation method using rule-based control is proposed. Its features are as follows: (1) a production system to recognize plant events, determine control actions and realize fast inference (fast selection of a suitable production rule), (2) use of the fuzzy control technique to determine quantitative control variables. The method's performance was evaluated by simulation tests on automatic control rod operation at a BWR plant start-up. The results were as follows; (1) The performance which is related to stabilization of controlled variables and time required for reactor start-up, was superior to that of other methods such as PID control and program control methods, (2) the process time to select and interpret the suitable production rule, which was the same as required for event recognition or determination of control action, was short (below 1 s) enough for real time control. The results showed that the method is effective for automatic control rod operation. (author)

  3. From the Conception to the Marketing of a New Automatic Control

    DEFF Research Database (Denmark)

    Nielsen, Peter V.; Kildegaard, Erik; Boel, Jan

    1985-01-01

    From a historical viewpoint, product technology has developed via radiator thermostats, return thermostats and selfacting automatic temperature and pressure controls towards more integrated automatic control systems also including weather compensators, which offer benefits in the form of energy s...

  4. DOE Radiological Control Manual Core Training Program

    International Nuclear Information System (INIS)

    Over the past year, the Department of Energy (DOE) Office of Health (EH-40) has taken a leading role in the development of new standardized radiological control training programs for use throughout the DOE complex. The Department promulgated its Radiological Control (RadCon) Manual in June 1992. To ensure consistent application of the criteria presented in the RadCon Manual, standardized radiological control core training courses and training materials have been developed for implementation at all DOE facilities. In producing local training programs, standardized core courses are to be supplemented with site-specific lesson plans, viewgraphs, student handbooks, qualification standards, question banks, and wallet-sized training certificates. Training programs for General Employee Radiological Training, Radiological Worker I and II Training, and Radiological Control Technician Training have been disseminated. Also, training committees under the direction of the Office of Health (EH-40) have been established for the development of additional core training courses, development of examination banks, and the update of the existing core training courses. This paper discusses the current activities and future direction of the DOE radiological control core training program

  5. Development of advanced automatic control system for nuclear ship. 2. Perfect automatic operation after reactor scram events

    Energy Technology Data Exchange (ETDEWEB)

    Yabuuchi, Noriaki; Nakazawa, Toshio; Takahashi, Hiroki; Shimazaki, Junya; Hoshi, Tsutao [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1997-11-01

    An automatic operation system has been developed for the purpose of realizing a perfect automatic plant operation after reactor scram events. The goal of the automatic operation after a reactor scram event is to bring the reactor hot stand-by condition automatically. The basic functions of this system are as follows; to monitor actions of the equipments of safety actions after a reactor scram, to control necessary control equipments to bring a reactor to a hot stand-by condition automatically, and to energize a decay heat removal system. The performance evaluation on this system was carried out by comparing the results using to Nuclear Ship Engineering Simulation System (NESSY) and the those measured in the scram test of the nuclear ship `Mutsu`. As the result, it was showed that this system had the sufficient performance to bring a reactor to a hot syand-by condition quickly and safety. (author)

  6. Development of advanced automatic control system for nuclear ship. 2. Perfect automatic operation after reactor scram events

    International Nuclear Information System (INIS)

    An automatic operation system has been developed for the purpose of realizing a perfect automatic plant operation after reactor scram events. The goal of the automatic operation after a reactor scram event is to bring the reactor hot stand-by condition automatically. The basic functions of this system are as follows; to monitor actions of the equipments of safety actions after a reactor scram, to control necessary control equipments to bring a reactor to a hot stand-by condition automatically, and to energize a decay heat removal system. The performance evaluation on this system was carried out by comparing the results using to Nuclear Ship Engineering Simulation System (NESSY) and the those measured in the scram test of the nuclear ship 'Mutsu'. As the result, it was showed that this system had the sufficient performance to bring a reactor to a hot syand-by condition quickly and safety. (author)

  7. Review on development progress of automatic manual transmissions control

    Institute of Scientific and Technical Information of China (English)

    ALI Amir Ibrahim; QIN Da-tong; ATTIA Nabil Abdulla

    2004-01-01

    In recent years, the sustainable development of automatic manual transmissions (AMTs) control in vehicles is conspicuous. The control applications have grown fast and steadily due to the tremendous progress in power electronics components and the control software that enhance the requirements for delivering higher vehicles performance. AMTs control strategies achieve a reduction in the driveline dynamic oscillations behavior during gear shifting and clutch starting up processes.AMTs future expectations are an increase of torque capacity, more speed ratios and the development of advanced and efficient electronic control systems. This paper concerns with the progressing view of AMTs in the past, today and future, gives an overview of the potential dynamic problems concerned with AMTs and some control strategies used to solve those problems.

  8. Automatic control system generation for robot design validation

    Science.gov (United States)

    Bacon, James A. (Inventor); English, James D. (Inventor)

    2012-01-01

    The specification and drawings present a new method, system and software product for and apparatus for generating a robotic validation system for a robot design. The robotic validation system for the robot design of a robotic system is automatically generated by converting a robot design into a generic robotic description using a predetermined format, then generating a control system from the generic robotic description and finally updating robot design parameters of the robotic system with an analysis tool using both the generic robot description and the control system.

  9. Automatic Reactive Power Control Using FC-TCR

    Directory of Open Access Journals (Sweden)

    Dhruvang R Gayakwad

    2014-06-01

    Full Text Available A fixed capacitor-thyristor controlled reactor (FC-TCR type of power factor compensator with different series R-L load is analyzed using an approximate circuit. The variation of reactive power and power factor before and after compensation is examined. The simulation is carried out in PSIM software for 3-phase 440 volt. The close loop control is possible for different load condition. Automatic firing angle is adjusted such that minimum VAR taken from the supply & power factor is maintain near to unity.

  10. MFM Automatic Control System Development for CYCIAE-100

    Institute of Scientific and Technical Information of China (English)

    CAO; Lei; YIN; Zhi-guo; LV; Yin-long; ZHONG; Jun-qing

    2012-01-01

    <正>In order to do the magnetic field measurement (MFM) work for CYCIAE-100, a set of MFM automatic facility has been developed by the cyclotron team at CIAE. 1 Design of project The MFM facility for CYCIAE-100 adopts the method of circular and radial motion to complete the measurement. In circular direction, an open loop control is adopted at hardware level. A kind of arithmetic is compensated to form a virtual closed loop control based on the position signal by angle encoder

  11. Fuzzy logic controller for automatic nuclear power plant

    International Nuclear Information System (INIS)

    In Nuclear power reactors, power stabilization is the desired goal for any reactor. During the normal operation of the reactor, different changes in its operating conditions occur such as: fuel bum-up, xenon isotope production, temperature and/or environmental changes. Therefore, an automatic nuclear power reactor control is required to compensate the reactivity changes produced by such variations. proportional-integral-derivative controller (PID), and fuzzy logic controller (FLC) schemes are discussed to achieve the optimal stabilization of power. Both PID and FLC controllers were developed as well as the reactor power plant model in order to analyze their performance. The simulation results show that FLC controller gives faster and better response. 6-16 figs., 12 refs

  12. Automatic and controlled processing and the Broad Autism Phenotype.

    Science.gov (United States)

    Camodeca, Amy; Voelker, Sylvia

    2016-01-30

    Research related to verbal fluency in the Broad Autism Phenotype (BAP) is limited and dated, but generally suggests intact abilities in the context of weaknesses in other areas of executive function (Hughes et al., 1999; Wong et al., 2006; Delorme et al., 2007). Controlled processing, the generation of search strategies after initial, automated responses are exhausted (Spat, 2013), has yet to be investigated in the BAP, and may be evidenced in verbal fluency tasks. One hundred twenty-nine participants completed the Delis-Kaplan Executive Function System Verbal Fluency test (D-KEFS; Delis et al., 2001) and the Broad Autism Phenotype Questionnaire (BAPQ; Hurley et al., 2007). The BAP group (n=53) produced significantly fewer total words during the 2nd 15" interval compared to the Non-BAP (n=76) group. Partial correlations indicated similar relations between verbal fluency variables for each group. Regression analyses predicting 2nd 15" interval scores suggested differentiation between controlled and automatic processing skills in both groups. Results suggest adequate automatic processing, but slowed development of controlled processing strategies in the BAP, and provide evidence for similar underlying cognitive constructs for both groups. Controlled processing was predictive of Block Design score for Non-BAP participants, and was predictive of Pragmatic Language score on the BAPQ for BAP participants. These results are similar to past research related to strengths and weaknesses in the BAP, respectively, and suggest that controlled processing strategy use may be required in instances of weak lower-level skills. PMID:26652842

  13. Implementation Of Automatic Wiper Speed Control And Headlight Modes Control Systems Using Fuzzy Logic

    Directory of Open Access Journals (Sweden)

    ThetKoKo

    2015-07-01

    Full Text Available Abstract This research paper describes the design and simulation of the automatic wiper speed and headlight modes controllers using fuzzy logic. This proposed system consists of a fuzzy logic controller to control a cars wiper speed and headlight modes. The automatic wiper system detects the rain and its intensity. And according to the rain intensity the wiper speed is automatically controlled. Headlight modes automatically changes either from low beam mode to high beam mode or form high beam mode to low beam mode depending on the light intensity from the other vehicle coming from the opposite direction. The system comprises of PIC impedance sensor piezoelectric vibration sensor LDR headlamps and a DC motor to accurate the windshield wiper. Piezoelectric sensor is used to detect the rain intensity which is based on the piezoelectric effect. MATLAB software is used to achieve the designed goal.

  14. Unfalsified Control; Application to automatic flight control system design

    Directory of Open Access Journals (Sweden)

    Adrian-Mihail STOICA

    2011-09-01

    Full Text Available Unfalsified Control Theory has been developed to provide a way for avoiding modeling uncertainties in controller design. It belongs to the class of control methods called Adaptive Supervisory Switching Control, which work by introducing in the control scheme a supervisory unit which chooses, from a set of candidate controllers the one most suited for the current plant. Unfalsified Control works by using a switching logic that dispenses with the need for a-priori knowledge of the dynamic model. At discrete moments of time, using the input/output data recorded up to that point, the supervisory calculates for each candidate controller a performance index, and compares it to a given threshold. Controllers surpassing that threshold are removed from the candidate controller set. This process is called falsification. If the controller in the loop is one such falsified controller it is replaced. In this paper we investigate the suitability of this method for aeronautical control applications. We review the theory behind this control scheme and adapt it to the case of controlling a fighter aircraft. We also provide a case study, where we test this control scheme on a simulated fighter aircraft.

  15. Development of automatic control techniques for HANARO NTD driving unit

    International Nuclear Information System (INIS)

    The results of the research on the NTD automatic control techniques started from the beginning of 2001. The motor control system is designed to operate with independent and simultaneous up-down and rotation of the silicon ingot motion and the setpoint of each motor speed could be easily adjusted by the control PC. Taking a few steps of field test, its performance has been successfully verified. Then, through the actual irradiation with the real silicon ingot under 24MW of reactor power, it has been confirmed that the motor control system developed could be applied to the commercial production. Two set of Rh-type SPNDs, known as a in-core neutron detector are used for real-time monitoring of the accumulated neutron irradiation. They are installed around the center position of the irradiation sleeve and the cables are carefully routed up to the top of the pool for connection to the DC amplifier. It has been verified, by the sample irradiation test for validation of the design that the neutron measurement system gives an accurate and stable signal, which shows a good consistency with the estimation. To precisely control the target fluence, the NTD control program has been designed so that the silicon ingot be automatically removed from its irradiation hole by the pre-defined irradiation time or accumulated neutron flux. Data acquisition program has been also developed for real-time monitoring and analysis of the analog signals, like SPND flux, control rod position and reactor power. The actual position of the silicon ingot is fedback from the motor control system via the digital communication port then used as a reference signal for the data analysis. It's been proved that a few times of sample irradiation tests under real condition that the NTD control software and the data acquisition program works satisfactorily and can be used for the commercial service next year

  16. Automatic control device for feedwater flow rate into reactor

    International Nuclear Information System (INIS)

    In automatic control for a water injection flow rate, an anticipated transient without screw (ATWS) signal is outputted upon judgement of the occurrence of ATWS event based on a reactor power signal and a scram demand signal, and a high pressure water injection system inactivation signal is outputted upon detection for the inactivation of a high pressure water injection system. An ATWS/high pressure water injection system inactivation judging section outputs a high pressure water injection system inactivation signal. A reactor pressure capable of water injection and a pressure change signal for setting opening/closing of a main steam relief valve corresponding thereto are calculated to output the same to a pressure control section for setting opening/closing of the main steam relief valve. Even if insertion of the entire control rods should fail upon scram by the loss of reactor water to disable the scram, and high pressure water injection system is not operated, the reactor pressure and the water level of the reactor are automatically controlled, and water is injected from a low pressure water injection system with no trouble, to suppress the reactor power. Then, the integrity of the reactor pressure vessel and the reactor container can be maintained. (N.H.)

  17. Patient ECG recording control for an automatic implantable defibrillator

    Science.gov (United States)

    Fountain, Glen H. (Inventor); Lee, Jr., David G. (Inventor); Kitchin, David A. (Inventor)

    1986-01-01

    An implantable automatic defibrillator includes sensors which are placed on or near the patient's heart to detect electrical signals indicative of the physiology of the heart. The signals are digitally converted and stored into a FIFO region of a RAM by operation of a direct memory access (DMA) controller. The DMA controller operates transparently with respect to the microprocessor which is part of the defibrillator. The implantable defibrillator includes a telemetry communications circuit for sending data outbound from the defibrillator to an external device (either a patient controller or a physician's console or other) and a receiver for sensing at least an externally generated patient ECG recording command signal. The patient recording command signal is generated by the hand held patient controller. Upon detection of the patient ECG recording command, DMA copies the contents of the FIFO into a specific region of the RAM.

  18. Academic Training: Real Time Process Control - Lecture series

    CERN Multimedia

    Françoise Benz

    2004-01-01

    ACADEMIC TRAINING LECTURE REGULAR PROGRAMME 7, 8 and 9 June From 11:00 hrs to 12:00 hrs - Main Auditorium bldg. 500 Real Time Process Control T. Riesco / CERN-TS What exactly is meant by Real-time? There are several definitions of real-time, most of them contradictory. Unfortunately the topic is controversial, and there does not seem to be 100% agreement over the terminology. Real-time applications are becoming increasingly important in our daily lives and can be found in diverse environments such as the automatic braking system on an automobile, a lottery ticket system, or robotic environmental samplers on a space station. These lectures will introduce concepts and theory like basic concepts timing constraints, task scheduling, periodic server mechanisms, hard and soft real-time.ENSEIGNEMENT ACADEMIQUE ACADEMIC TRAINING Françoise Benz 73127 academic.training@cern.ch

  19. Automatic Control of Gene Expression in Mammalian Cells.

    Science.gov (United States)

    Fracassi, Chiara; Postiglione, Lorena; Fiore, Gianfranco; di Bernardo, Diego

    2016-04-15

    Automatic control of gene expression in living cells is paramount importance to characterize both endogenous gene regulatory networks and synthetic circuits. In addition, such a technology can be used to maintain the expression of synthetic circuit components in an optimal range in order to ensure reliable performance. Here we present a microfluidics-based method to automatically control gene expression from the tetracycline-inducible promoter in mammalian cells in real time. Our approach is based on the negative-feedback control engineering paradigm. We validated our method in a monoclonal population of cells constitutively expressing a fluorescent reporter protein (d2EYFP) downstream of a minimal CMV promoter with seven tet-responsive operator motifs (CMV-TET). These cells also constitutively express the tetracycline transactivator protein (tTA). In cells grown in standard growth medium, tTA is able to bind the CMV-TET promoter, causing d2EYFP to be maximally expressed. Upon addition of tetracycline to the culture medium, tTA detaches from the CMV-TET promoter, thus preventing d2EYFP expression. We tested two different model-independent control algorithms (relay and proportional-integral (PI)) to force a monoclonal population of cells to express an intermediate level of d2EYFP equal to 50% of its maximum expression level for up to 3500 min. The control input is either tetracycline-rich or standard growth medium. We demonstrated that both the relay and PI controllers can regulate gene expression at the desired level, despite oscillations (dampened in the case of the PI controller) around the chosen set point. PMID:26414746

  20. Intelligent Fatigue Detection and Automatic Vehicle Control System

    OpenAIRE

    Monali Gulhane; P.S.Mohod

    2014-01-01

    This paper describes method for detecting the early signs of fatigue in train drivers. As soon as the train driver is falling in symptoms of fatigue immediate message will be transfer to the control room indicating the status of the drivers. In addition of the advance technology of heart rate sensors is also added in the system for correct detection of status of driver if in either case driver is falling to fatigue due to any sever medical problems .The fatigue is detected in the system by th...

  1. On-line current feed and computer aided control tactics for automatic balancing head

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In the designed automatic balancing head,a non-contact induction transformer is used to deliver driving energy to solve the problem of current fed and controlling on-line.Computer controlled automatic balancing experiments with phase-magnitude control tactics were performed on a flexible rotor system.Results of the experiments prove that the energy feeding method and the control tactics are effective in the automatic balancing head for vibration controlling.

  2. Automatic Overset Grid Generation with Heuristic Feedback Control

    Science.gov (United States)

    Robinson, Peter I.

    2001-01-01

    An advancing front grid generation system for structured Overset grids is presented which automatically modifies Overset structured surface grids and control lines until user-specified grid qualities are achieved. The system is demonstrated on two examples: the first refines a space shuttle fuselage control line until global truncation error is achieved; the second advances, from control lines, the space shuttle orbiter fuselage top and fuselage side surface grids until proper overlap is achieved. Surface grids are generated in minutes for complex geometries. The system is implemented as a heuristic feedback control (HFC) expert system which iteratively modifies the input specifications for Overset control line and surface grids. It is developed as an extension of modern control theory, production rules systems and subsumption architectures. The methodology provides benefits over the full knowledge lifecycle of an expert system for knowledge acquisition, knowledge representation, and knowledge execution. The vector/matrix framework of modern control theory systematically acquires and represents expert system knowledge. Missing matrix elements imply missing expert knowledge. The execution of the expert system knowledge is performed through symbolic execution of the matrix algebra equations of modern control theory. The dot product operation of matrix algebra is generalized for heuristic symbolic terms. Constant time execution is guaranteed.

  3. Statistical analysis of quality control of automatic processor

    International Nuclear Information System (INIS)

    Objective: To strengthen the scientific management of automatic processor and promote QC, based on analyzing QC management chart for automatic processor by statistical method, evaluating and interpreting the data and trend of the chart. Method: Speed, contrast, minimum density of step wedge of film strip were measured everyday and recorded on the QC chart. Mean (x-bar), standard deviation (s) and range (R) were calculated. The data and the working trend were evaluated and interpreted for management decisions. Results: Using relative frequency distribution curve constructed by measured data, the authors can judge whether it is a symmetric bell-shaped curve or not. If not, it indicates a few extremes overstepping control limits possibly are pulling the curve to the left or right. If it is a normal distribution, standard deviation (s) is observed. When x-bar +- 2s lies in upper and lower control limits of relative performance indexes, it indicates the processor works in stable status in this period. Conclusion: Guided by statistical method, QC work becomes more scientific and quantified. The authors can deepen understanding and application of the trend chart, and improve the quality management to a new step

  4. Colorized linear CCD data acquisition system with automatic exposure control

    Science.gov (United States)

    Li, Xiaofan; Sui, Xiubao

    2014-11-01

    Colorized linear cameras deliver superb color fidelity at the fastest line rates in the industrial inspection. It's RGB trilinear sensor eliminates image artifacts by placing a separate row of pixels for each color on a single sensor. It's advanced design minimizes distance between rows to minimize image artifacts due to synchronization. In this paper, the high-speed colorized linear CCD data acquisition system was designed take advantages of the linear CCD sensor μpd3728. The hardware and software design of the system based on FPGA is introduced and the design of the functional modules is performed. The all system is composed of CCD driver module, data buffering module, data processing module and computer interface module. The image data was transferred to computer by Camera link interface. The system which automatically adjusts the exposure time of linear CCD, is realized with a new method. The integral time of CCD can be controlled by the program. The method can automatically adjust the integration time for different illumination intensity under controlling of FPGA, and respond quickly to brightness changes. The data acquisition system is also offering programmable gains and offsets for each color. The quality of image can be improved after calibration in FPGA. The design has high expansibility and application value. It can be used in many application situations.

  5. Training change control process at Cernavoda NPP

    International Nuclear Information System (INIS)

    Full text: The paper presents the process of 'Training Change Control' at Cernavoda NPP. This process is a systematic approach that allows determination of the most effective training and/or non-training solutions for challenges that may influence the content and conditions for a training program or course. Changes may be the result of: - response to station systems or equipment modifications; - new or revised procedures; - regulatory requirements; - external organizations requirements; - internal evaluations meaning feedback from trainees, trainers, management or post-training evaluations; - self-assessments; - station condition reports; - operating experience (OPEX); - modifications of job scope; - management input. The Training Change Control Process at Cernavoda NPP includes the following aspects. The first step is the identification of all the initiating factors for a potential training change. Then, retain only those, which could have an impact on training and classify them in two categories: as deficiencies or as enhancement suggestions. The process is different for the two categories. The deficiency category supposes the application of the Training Needs Analysis (TNA) process. This is a performance-oriented process, resulting in more competent employees, solving existing and potential performance problems. By using needs analysis to systematically determine what people or courses and programs are expected to do and gathering data to reveal what they are really doing, we can receive a clear picture of the problem and then we can establish corrective action plans to fix it. The process is supported by plant subjects matter and by training specialists. On the other hand, enhancements suggestions are assessed by designated experienced persons and then are implemented in the training process. Regarding these two types of initiating factors for the training change control process, the final result consists of a training improvement, raising the effectiveness

  6. Cost effective material control and accountability training

    International Nuclear Information System (INIS)

    DOE Order 5630.15, ''Safeguards and Security Training Program'' is being implemented at the Savannah River Site within the Westinghouse Savannah River Company's material control and accountability program. This paper reviews the development of a material control and accountability task analysis, the development of specific material control and accountability courses, and the cost effective and innovative strategies employed to implement the training program. The paper also discusses how the site material control and accountability policies and procedures are incorporated into the Westinghouse Savannah River Company training program to ensure that personnel receive the most current information

  7. Automatic Meter Reading and Theft Control System by Using GSM

    Directory of Open Access Journals (Sweden)

    P. Rakesh Malhotra

    2013-04-01

    Full Text Available This paper deals with automatic meter reading and theft control system in energy meter. Current transformer is used to measure the total power consumption for house or industrial purpose. This recorded reading is transmitted to the electricity board for every 60 days once. For transmitting the reading of energy meter GSM module is used. To avoid theft, infrared sensor is placed in the screw portion of energy meter seal. If the screw is removed from the meter a message is sent to the electricity board. The measuring of energy meter and monitoring of IR sensor is done with a PIC microcontroller.The informative system will be helpful for the electricity board to monitor the entire supply and the correct billing accordingly without any mishap. This model reduces the manual manipulation work andtheft control.

  8. Towards Automatic Controller Design using Multi-Objective Evolutionary Algorithms

    DEFF Research Database (Denmark)

    Pedersen, Gerulf

    evolutionary computation, a choice was made to use multi-objective algorithms for the purpose of aiding in automatic controller design. More specifically, the choice was made to use the Non-dominated Sorting Genetic Algorithm II (NSGAII), which is one of the most potent algorithms currently in use, as the......In order to design the controllers of tomorrow, a need has risen for tools that can aid in the design of these. A desire to use evolutionary computation as a tool to achieve that goal is what gave inspiration for the work contained in this thesis. After having studied the foundations of...... foundation for achieving the desired goal. While working with the algorithm, some issues arose which limited the use of the algorithm for unknown problems. These issues included the relative scale of the used fitness functions and the distribution of solutions on the optimal Pareto front. Some work has...

  9. Radiological contamination control training for laboratory research

    International Nuclear Information System (INIS)

    This program management guide describes the proper implementation standard for core training as outlined in the DOE Radiological Control (RadCon) Manual. The guide is to assist those individuals, both within the Department of Energy (DOE) and Managing and Operating (M and O) contractors, identified as having responsibility for implementing the core training recommended by the RadCon Manual. The management guide is divided into the following sections: introduction; instructional materials development; training program standards and policies; and course-specific information. The goal of the core training program is to provide a standardized, baseline knowledge for those individuals completing the core training. Standardization of the knowledge provides personnel with the information necessary to perform their assigned duties at a predetermined level of expertise. Implementing a core training program ensures consistent and appropriate training of personnel

  10. Automatic Level Control for Video Cameras towards HDR Techniques

    Directory of Open Access Journals (Sweden)

    de With PeterHN

    2010-01-01

    Full Text Available We give a comprehensive overview of the complete exposure processing chain for video cameras. For each step of the automatic exposure algorithm we discuss some classical solutions and propose their improvements or give new alternatives. We start by explaining exposure metering methods, describing types of signals that are used as the scene content descriptors as well as means to utilize these descriptors. We also discuss different exposure control types used for the control of lens, integration time of the sensor, and gain control, such as a PID control, precalculated control based on the camera response function, and propose a new recursive control type that matches the underlying image formation model. Then, a description of commonly used serial control strategy for lens, sensor exposure time, and gain is presented, followed by a proposal of a new parallel control solution that integrates well with tone mapping and enhancement part of the image pipeline. Parallel control strategy enables faster and smoother control and facilitates optimally filling the dynamic range of the sensor to improve the SNR and an image contrast, while avoiding signal clipping. This is archived by the proposed special control modes used for better display and correct exposure of both low-dynamic range and high-dynamic range images. To overcome the inherited problems of limited dynamic range of capturing devices we discuss a paradigm of multiple exposure techniques. Using these techniques we can enable a correct rendering of difficult class of high-dynamic range input scenes. However, multiple exposure techniques bring several challenges, especially in the presence of motion and artificial light sources such as fluorescent lights. In particular, false colors and light-flickering problems are described. After briefly discussing some known possible solutions for the motion problem, we focus on solving the fluorescence-light problem. Thereby, we propose an algorithm for

  11. OPTIMAL CONTROL APPLIED IN AUTOMATIC CLUTCH ENGAGEMENTS OF VEHICLES

    Institute of Scientific and Technical Information of China (English)

    Sun Chengshun; Zhang Jianwu

    2004-01-01

    Start-up working condition is the key to the research of optimal engagement of automatic clutch for AMT.In order to guarantee an ideal dynamic performance of the clutch engagement,an optimal controller is designed by considering throttle angle,engine speed,gear ratio,vehicle acceleration and road condition.The minimum value principle is also introduced to achieve an optimal dynamic performance of the nonlinear system compromised in friction plate wear and vehicle drive quality.The optimal trajectory of the clutch engagement can be described in the form of explicit and analytical expressions and characterized by the deterministic and accurate control strategy in stead of indeterministic and soft control techniques which need thousands of experiments.For validation of the controller,test work is carried out for the automated clutch engagements in a commercial car with an traditional mechanical transmission,a hydraulic actuator,a group of sensors and a portable computer system.It is shown through experiments that dynamic behaviors of the clutch engagement operated by the optimal control are more effective and efficient than those by fuzzy control.

  12. Optoacoustic temperature determination and automatic coagulation control in rabbits

    Science.gov (United States)

    Schlott, Kerstin; Koinzer, Stefan; Ptaszynski, Lars; Luft, Susanne; Baade, Alex; Bever, Marco; Roider, Johann; Birngruber, Reginald; Brinkmann, Ralf

    2011-03-01

    Retinal laser photocoagulation is an established treatment method for many retinal diseases like macula edema or diabetic retinopathy. The selection of the laser parameters is so far based on post treatment evaluation of the lesion size and strength. Due to local pigment variations in the fundus and individual transmission the same laser parameters often lead to an overtreatment. Optoacoustic allows a non invasive monitoring of the retinal temperature increase during retinal laser irradiation by measuring the temperature dependent pressure amplitudes, which are induced by short probe laser pulses. A 75 ns/ 523 nm Nd:YLF was used as a probe laser at a repetition rate of 1 kHz, and a cw / 532 nm treatment laser for heating. A contact lens was modified with a ring-shaped ultrasonic transducer to detect the pressure waves at the cornea. Temperatures were collected for irradiations leading to soft or invisible lesions. Based on this data the threshold for denaturation was found. By analyzing the initial temperature increase, the further temperature development during irradiation could be predicted. An algorithm was found to calculate the irradiation time, which is needed for a soft lesion formation, from the temperature curve. By this it was possible to provide a real-time dosimetry by automatically switching off the treatment laser after the calculated irradiation time. Automatically controlled coagulations appear softer and more uniformly.

  13. The automatic system of the personal dose control

    International Nuclear Information System (INIS)

    Full text: The automatic system of the personal dose control (ASPDC) is the subsystem of the automatic radiation control system for nuclear power plant (NPP). The goal of ASPDC is to provide complete on-line control of the internal and external occupational exposure that is necessary to determine the dependence of the NPP personnel's health on the accumulated dose and to demonstrate safety and controllability of ionizing radiation sources. This goal is achieved by implementing three types of monitoring in ASPDC: current, cumulative and emergency monitoring. The dose of external exposure is measured with electronic personal dosimeters -AT-2503 (dose equivalent Hp(10) and dose rate equivalent of x-rays and gamma-rays) and with thermo luminescent dosimeters PDC-301). The dose of internal exposure is determined using whole-body counter AT-1316. Current monitoring allows controlling the exposure dose per one visit to the restricted-access area (RAA). The exposure dose gained since the beginning of the current year is monitored on entrance to the RAA. The dose and dose rate of exposure are recorded during working and on exit of the RAA. The exposure dose accumulated during the stay in the RAA is also recorded upon exiting the RAA. Electronic dosimeters AT-2503 are used for the on-line monitoring. This dosimeters feature digital display, audio and visual alarms, and allow minimizing the occupational exposure. Coupled with reading devices and a personal computer, they form an automated workstation AW AT-2503. Cumulative monitoring enables controlling the cumulative exposure dose accrued during the current year. It considers both internal and external exposure, and monitors neutron, beta and gamma irradiation. A system of passive thermo luminescent dosimeters PDC-301 and a whole- body counter AT-1316 are used to perform cumulative monitoring. Emergency monitoring facilitates exposure dose control during hazardous or recovery activities at NPP. The notable features of ASPDC

  14. Robust parameter design for automatically controlled systems and nanostructure synthesis

    Science.gov (United States)

    Dasgupta, Tirthankar

    2007-12-01

    This research focuses on developing comprehensive frameworks for developing robust parameter design methodology for dynamic systems with automatic control and for synthesis of nanostructures. In many automatically controlled dynamic processes, the optimal feedback control law depends on the parameter design solution and vice versa and therefore an integrated approach is necessary. A parameter design methodology in the presence of feedback control is developed for processes of long duration under the assumption that experimental noise factors are uncorrelated over time. Systems that follow a pure-gain dynamic model are considered and the best proportional-integral and minimum mean squared error control strategies are developed by using robust parameter design. The proposed method is illustrated using a simulated example and a case study in a urea packing plant. This idea is also extended to cases with on-line noise factors. The possibility of integrating feedforward control with a minimum mean squared error feedback control scheme is explored. To meet the needs of large scale synthesis of nanostructures, it is critical to systematically find experimental conditions under which the desired nanostructures are synthesized reproducibly, at large quantity and with controlled morphology. The first part of the research in this area focuses on modeling and optimization of existing experimental data. Through a rigorous statistical analysis of experimental data, models linking the probabilities of obtaining specific morphologies to the process variables are developed. A new iterative algorithm for fitting a Multinomial GLM is proposed and used. The optimum process conditions, which maximize the above probabilities and make the synthesis process less sensitive to variations of process variables around set values, are derived from the fitted models using Monte-Carlo simulations. The second part of the research deals with development of an experimental design methodology, tailor

  15. Training for Certification: Aquatic Pest Control.

    Science.gov (United States)

    Wamsley, Mary Ann, Ed.; Vermeire, Donna M., Ed.

    This Cooperative Extension Service publication from Mississippi State University is a training guide for commercial applicators. Weed control, vertebrate pest control, and environmental considerations and restrictions are the three major parts of the document. The weed control section discusses non-pesticide, mechanical, and biological control as…

  16. Human interface, automatic planning, and control of a humanoid robot

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Y.K. [Korea Inst. of Science and Technology, Seoul (Korea, Republic of)]|[Sandia National Labs., Albuquerque, NM (United States); Kang, S.C.; Lee, S.; Cho, K.R.; Kim, H.S.; Lee, C.W. [Korea Inst. of Science and Technology, Seoul (Korea, Republic of); Park, S.M. [Jeonju Technical Coll. (Korea, Republic of)

    1998-11-01

    This paper presents an integrated robotic system consisting of human interfaces, motion- and grasp-planning algorithms, a controller, a graphical simulator, and a humanoid robot with over 60 joints. All of these subsystems are integrated in a coordinated fashion to enable the robot to perform a commanded task with as much autonomy as possible. The highest level of the system is the human interfaces, which enable a user to specify tasks conveniently and efficiently. At the mid-level, several planning algorithms generate motions of the robot body, arms, and hands automatically. At the lowest level, the motor controllers are equipped with both a position controller and a compliant motion controller to execute gross motions and contact motions, respectively. The main contributions of the work are the large-scale integration and the development of the motion planners for a humanoid robot. A hierarchical integration scheme that preserves the modularities of the human interfaces, the motion planners, and the controller has been the key for the successful integration. The set of motion planners is developed systematically so as to coordinate the motions of the body, arms, and hands to perform a large variety of tasks.

  17. Automatic Bayesian classification of healthy controls, bipolar disorder and schizophrenia using intrinsic connectivity maps from fMRI data

    OpenAIRE

    Arribas, Juan I.; Calhoun, Vince D.; Adalı, Tülay

    2010-01-01

    We present a method for supervised, automatic and reliable classification of healthy controls, patients with bipolar disorder and patients with schizophrenia using brain imaging data. The method uses four supervised classification learning machines trained with a stochastic gradient learning rule based on the minimization of Kullback-Leibler divergence and an optimal model complexity search through posterior probability estimation. Prior to classification, given the high dimensionality of fun...

  18. Training Visual Control in Wheelchair Basketball Shooting

    Science.gov (United States)

    Oudejans, Raoul R. D.; Heubers, Sjoerd; Ruitenbeek, Jean-Rene J. A. C.; Janssen, Thomas W. J.

    2012-01-01

    We examined the effects of visual control training on expert wheelchair basketball shooting, a skill more difficult than in regular basketball, as players shoot from a seated position to the same rim height. The training consisted of shooting with a visual constraint that forced participants to use target information as late as possible.…

  19. WIRELESS SENSOR NETWORK (WSN) BASED AUTOMATIC FIRING PRACTICE SYSTEM (AFPS) FOR TRAINING OF LAW ENFORCEMENT AGENCIES (LEAS)

    OpenAIRE

    Imran Jattala; Junaid Farooqi; Shakeel Durrani; Nassar Ikram; Irfan Hussian; Muazzam A. Goraya; Obaid B. Zakria

    2014-01-01

    The critical importance of an efficient infantryman in special operations force, tactical paramilitary and Law Enforcement Agencies (LEAs) is insurmountable. One of the many vital aspects of an effective solider is excellent marksmanship which requires extensive training at sophisticated firing ranges. Modern firing ranges are supported by Automatic Firing Practice Systems (AFPS) and this paper presents the design and development of such a system based on WSN. AFPS provide an automatic bullet...

  20. Instrumentation and control for cost-effective train driving; Leittechnik fuer einen rationellen Fahrbetrieb

    Energy Technology Data Exchange (ETDEWEB)

    Kollmannsberger, F. [Deutsche Bahn AG, Muenchen (DE). Forschungs- und Technologie-Zentrum (TZF-4)

    2001-01-01

    What are the challenges to be met by instrumentation and control equipment which will finally result in cost-effective train driving? The current starting point is the technology of automated underground railway and people mover systems. In its high-speed traffic, Deutsche Bahn AG (DBAG) uses the LZB continuous speed control system with automatic train stop, ie the trains use speed signalling with automatic driving and brake control. However, future application of these systems will raise important questions regarding the effects on an increase in transport earnings, cost reductions and higher productivity. The article discusses the potentials available for capacity increases and the automation phases. Examples of cost reductions in the infrastructure area are presented. Unification and standardisation are means of contributing to achieving cost reductions. An important conclusion is that automation in the field of transport normally results in higher safety in actual fact. This is confirmed by examples. DBAG's pilot project dealing with automatic, flexible driving of an S-Bahn train is to culminate in a demonstration unit in Dresden in 2003/2004 because statistics have shown that flexible driving will result in a higher transport efficiency. To be able to utilise telematics to a greater extent, the European railways are creating a telematics platform, ie the European Rail Traffic Management System (ERTMS) with the components GSM Railway for digital cellular radio and the European Train Control System for train control and protection. (orig.)

  1. TRAINING SYSTEM OF FUTURE SPECIALISTS: QUALITY CONTROL

    Directory of Open Access Journals (Sweden)

    Vladimir A. Romanov

    2015-09-01

    Full Text Available The aim of the investigation is development of innovative strategy of quality control training of engineers and skilled workers (hereinafter – future specialists in educational professional organizations on the principles of social partnership.Methods. Theoretic: theoretic and methodological analysis, polytheoretic synthesis, modeling. Empirical: research and generalization of the system, process and competence – based approaches experience, experiment, observation, surveys, expert evaluation, SWOT-analysis as a method of strategic planning which is to identify the internal and external factors (socio-cultural of the organization surrounding.Results. The strategy of the development of the process of quality control training in educational professional organizations and a predictive model of the system of quality control training for future engineers and workers have been created on the analysis and synthesis of a quantitative specification of the quality, the obtained experience and success in control training of future specialists in educational professional organizations in recent economic and educational conditions.Scientific novelty. There has been built a predicative model of quality control training of future specialists to meet modern standards and the principles of social partnership; the control algorithm of the learning process, developed in accordance with the standards (international of quality ISO in the implementation of the quality control systems of the process approach (matrix-based responsibility, competence and remit of those responsible for the education process in the educational organization, the «problem» terms and diagnostic tools for assessing the quality of professional training of future specialists. The perspective directions of innovation in the control of the quality of future professionals training have been determined; the parameters of a comprehensive analysis of the state of the system to ensure the

  2. Automatic generation and verification of railway interlocking control tables using FSM and NuSMV

    Directory of Open Access Journals (Sweden)

    Mohammad B. YAZDI

    2009-01-01

    Full Text Available Due to their important role in providing safe conditions for train movements, railway interlocking systems are considered as safety critical systems. The reliability, safety and integrity of these systems, relies on reliability and integrity of all stages in their lifecycle including the design, verification, manufacture, test, operation and maintenance.In this paper, the Automatic generation and verification of interlocking control tables, as one of the most important stages in the interlocking design process has been focused on, by the safety critical research group in the School of Railway Engineering, SRE. Three different subsystems including a graphical signalling layout planner, a Control table generator and a Control table verifier, have been introduced. Using NuSMV model checker, the control table verifier analyses the contents of control table besides the safe train movement conditions and checks for any conflicting settings in the table. This includes settings for conflicting routes, signals, points and also settings for route isolation and single and multiple overlap situations. The latest two settings, as route isolation and multiple overlap situations are from new outcomes of the work comparing to works represented on the subject recently.

  3. Virtual Training of Compressor Control Room Project

    Data.gov (United States)

    National Aeronautics and Space Administration — MYMIC will analyze, design, develop and evaluate the Virtual Control Room – Compressor Station (VCoR-CS) training system. VCoR-CS will provide procedural...

  4. Research on key control technologies of all-position automatic welding machine

    Institute of Scientific and Technical Information of China (English)

    Zeng Huilin; Du Zeyu; Ma Jing; Huang Fuxiang

    2009-01-01

    The pipeline all-position automatic welding machine system is a special welding system for automatically welding circumferential joint of pipeline on site, which has been widely used to the long-distance pipeline construction projects due to the advantages of automatic control for welding parameters at all-position, moving speed of bugs and operating. In this paper, the key control technologies of PAWM all-position automatic welding machine (developed by Pipeline Research Institute of CNPC) such as the automatic control system, control software, personal digital assistant (PDA) software and complex programmable logic device(CPLD) program as well as the control method of welding parameter have been described detailedly. With the higher welding quality, higher welding efficiency and lower labor intensity, PAWM all-position automatic welding machine has been successfully applied in many famous pipeline construction projects.

  5. Study on automatic control of high uranium concentration solvent extraction with pulse sieve-plate column

    International Nuclear Information System (INIS)

    The author mainly described the working condition of the automatic control system of high uranium concentration solvent extraction with pulse sieve-plate column on a large scale test. The use of the automatic instrument and meter, automatic control circuit, and the best feedback control point of the solvent extraction processing with pulse sieve-plate column are discussed in detail. The writers point out the success of this experiment on automation, also present some questions that should be cared for the automatic control, instruments and meters in production in the future

  6. Effectiveness of Automatic Control over Flash Distillation Kettle for Liquid-Phase Bulk Polymerization of Propylene

    Institute of Scientific and Technical Information of China (English)

    Han Linge; Ma Jiantong

    2004-01-01

    Automatic control over flash distillation section at SINOPEC Cangzhou Refinery has been realized, resulting in saving of propylene feedstock and emission reduction to harvest significant economic benefits.

  7. Training for Certification: Ornamental & Turf Pest Control.

    Science.gov (United States)

    Mississippi State Univ., State College. Cooperative Extension Service.

    This Cooperative Extension Service publication from Mississippi State University is a training guide for commercial pesticide applicators. Focusing on ornamental and turf plant pest control, this publication examines the control of plant diseases, insects, and weeds. The contents are divided into a section on ornamental pest control and one on…

  8. Automatic control of the ITER Ion Cyclotron system

    International Nuclear Information System (INIS)

    The ITER Ion Cyclotron Heating System should routinely operate close to the maximum nominal RF power output (20 MW) in quasi-continuous operation, with infrequent power interruptions, due to voltage breakdowns and/or equipment protective actions. An efficient power transfer from the IC array to the plasma requires a sophisticated control system capable of: i) controlling the array radiation spectrum during the power pulse, so as to optimize plasma coupling and absorption and to minimize parasitic power losses in the plasma edge; ii) maintaining the RF power flow to the plasma against significant load variations, including fast fluctuations induced by ELMs; iii) reliably detecting and suppressing RF voltage breakdowns in the array and/or in the transmission system, with a time response of few microseconds, to limit the energy deposited in the arc and to avoid local equipment damage; iv) providing an accurate real time performance assessment In this paper a method of fully automatic control of the ITER ICH system is proposed. In particular, the problem of an efficient and reliable arc detection in the array and in the associated transmission line(s) is addressed and ways to maintain the required power flow to the plasma in case of partial fault conditions analyzed. (author)

  9. Microcontroller based automatic liquid poison addition control system

    International Nuclear Information System (INIS)

    Microcontrollers are finding increasing applications in instrumentation where complex digital circuits can be substituted by a compact and simple circuit, thus enhancing the reliability. In addition to this, intelligence and flexibility can be incorporated. For applications not requiring large amount of read/write memory (RAM), microcontrollers are ideally suited since they contain programmable memory (Eprom), parallel input/output lines, data memory, programmable timers and serial interface ports in one chip. This paper describes the design of automatic liquid poison addition control system (ALPAS) using intel's 8 bit microcontroller 8751, which is used to generate complex timing control sequence signals for liquid poison addition to the moderator in a nuclear reactor. ALPAS monitors digital inputs coming from protection system and regulating system of a nuclear reactor and provides control signals for liquid poison addition for long term safe shutdown of the reactor after reactor trip and helps the regulating system to reduce the power of the reactor during operation. Special hardware and software features have been incorporated to improve performance and fault detection. (author)

  10. Solar Driven Automatic Water Level Controller with Dry Run Protection

    Directory of Open Access Journals (Sweden)

    V. Ravikiran,

    2015-11-01

    Full Text Available This paper presents solar driven automatic water level controller with dry run protection (SDWLC. The main purpose of SDWLC is to reduce wastage of water, to stop dry running of motor and to use solar energy effectively by using PV system. Generally water is pumped to overheadtank (OHT from undergroundtank (UGT.People will switch on pump when taps go dry, switch off pump when water over flows and they does not check dry running of motor during this. Also pumping of water to OHT during power cuts is a major problem in most of villages and in some of cities. However these problems can be solved by SDWLC. By using inverter the DC generated from PV system is converted in to AC and given to the motor. The operation of water level controller works upon the fact that water conducts electricity. So water can be used to open or close a circuit. As the water level rises or falls, different circuits in the controller send different signals. These signals are used to switch ON or switch OFF the motor pump as per our requirements.

  11. Automatic Training Site Selection for Agricultural Crop Classification: a Case Study on Karacabey Plain, Turkey

    Science.gov (United States)

    Ozdarici Ok, A.; Akyurek, Z.

    2011-09-01

    This study implements a traditional supervised classification method to an optical image composed of agricultural crops by means of a unique way, selecting the training samples automatically. Panchromatic (1m) and multispectral (4m) Kompsat-2 images (July 2008) of Karacabey Plain (~100km2), located in Marmara region, are used to evaluate the proposed approach. Due to the characteristic of rich, loamy soils combined with reasonable weather conditions, the Karacabey Plain is one of the most valuable agricultural regions of Turkey. Analyses start with applying an image fusion algorithm on the panchromatic and multispectral image. As a result of this process, 1m spatial resolution colour image is produced. In the next step, the four-band fused (1m) image and multispectral (4m) image are orthorectified. Next, the fused image (1m) is segmented using a popular segmentation method, Mean- Shift. The Mean-Shift is originally a method based on kernel density estimation and it shifts each pixel to the mode of clusters. In the segmentation procedure, three parameters must be defined: (i) spatial domain (hs), (ii) range domain (hr), and (iii) minimum region (MR). In this study, in total, 176 parameter combinations (hs, hr, and MR) are tested on a small part of the area (~10km2) to find an optimum segmentation result, and a final parameter combination (hs=18, hr=20, and MR=1000) is determined after evaluating multiple goodness measures. The final segmentation output is then utilized to the classification framework. The classification operation is applied on the four-band multispectral image (4m) to minimize the mixed pixel effect. Before the image classification, each segment is overlaid with the bands of the image fused, and several descriptive statistics of each segment are computed for each band. To select the potential homogeneous regions that are eligible for the selection of training samples, a user-defined threshold is applied. After finding those potential regions, the

  12. A device for automatic photoelectric control of the analytical gap for emission spectrographs

    Science.gov (United States)

    Dietrich, John A.; Cooley, Elmo F.; Curry, Kenneth J.

    1977-01-01

    A photoelectric device has been built that automatically controls the analytical gap between electrodes during excitation period. The control device allows for precise control of the analytical gap during the arcing process of samples, resulting in better precision of analysis.

  13. Training of personnel involved in regulatory control

    International Nuclear Information System (INIS)

    Food irradiation can offer its full potential benefit only if irradiation facilities and processes are subject to strict control measures. The training of personnel involved in the process and inspection or control of the process and facilities must form an integral part of all food irradiation control procedures. Thus, training courses for irradiator operators, plant managers and supervisors that address proper processing with emphasis on good manufacturing practices (GMPs), dosimetry, record keeping and lot identification should be organized. For food control officials, training in the appropriate inspection procedures required for food irradiation facilities and processes is essential. Last but not least, voluntary compliance is deemed as an ideal but conceivable strategy to sustain and acceptable degree of quality assurance and facilitate effective control and hence should be promoted. (author). 13 refs

  14. Materials control and accountability auditor training

    International Nuclear Information System (INIS)

    As the Department of Energy (DOE) works to standardize the training for individuals performing materials control and accountability (MC and A) functions, the need for a definition of the appropriate training for MC and A auditors has become apparent. In order to meet the DOE requirement for individual training plans for all staff performing MC and A functions, the following set of guidelines was developed for consideration as applicable to MC and A auditors. The application of these guidelines to specific operating environments at individual DOE sites may require modification to some of the tables. The paper presents one method of developing individual training programs for an MC and A auditor or for an MC and A audit group based on the requirements for internal audits and assessments included in DOE Order 5633.3, Control and Accountability for Nuclear Materials

  15. Training for Certification: Forest Pest Control.

    Science.gov (United States)

    Parker, Robert C., Comp.

    This Cooperative Extension Service publication from Mississippi State University is a training guide for commercial pesticide applicators. Focusing on forest pest control, this publication examines plant and animal pest control practices for southern tree species. Contents include: (1) identification of insects, diseases, and weed tree species;…

  16. Training for Certification: Demonstration & Research Pest Control.

    Science.gov (United States)

    Mississippi State Univ., State College. Cooperative Extension Service.

    This Cooperative Extension Service publication from Mississippi State University is a training guide for commercial pesticide applicators. Focusing on agricultural pest control, this publication includes a full range of topics from uses of pesticides for agricultural animal pest control to the toxicity of common pesticides to fish and bees.…

  17. Research and application of Automatic Voltage Control in Tongbai Pumped Storage Power Station

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    The Automatic Voltage Control is significant technique of modem power grid operation, and it is one of important function of intelligent grid management, it plays an important role to ensure the security, high quality and economical operation of power grid. This paper introduces the research and application of Automatic Voltage Control in Tongtai Pumped Storage Power Station.

  18. ARCPAS - Automatic radiation control point access system an automated data collection terminal for radiation dose and access control

    International Nuclear Information System (INIS)

    Nuclear facilities such as nuclear power plants or fuel processing facilities are required to maintain accurate records of personnel access, exposure and work performed. Most facilities today have some sort of computerized data collection system for radiation dose and access control. The great majority rely on handwritten records, i.e., dose card or sign-in sheet which in turn are transferred to a computerized records management system manually. The ARCPAS terminal provides a method for automating personnel exposure data collection and processing. The terminal is a user interactive device which contains a unit for automatically reading and zeroing pocket dosemeters, a security badge reader for personnel identification, a 16 digit key pad for RWP information entry, a high resolution color CRT for interactive communication and a high speed tape printer providing an entry chit. The chit provides the individual worker with a record of the transaction including an individual identifying number, remaining dose for the quarter or period and RWP under which the worker entered the controlled area. The purpose of automating the access control is to provide fast, accurate, realtime data to the records management system. A secondary purpose is to relieve trained health physics technicians of control point duties so that their training and skills can be utilized more effectively in a facility's health physics program

  19. Neurofeedback Training for BCI Control

    Science.gov (United States)

    Neuper, Christa; Pfurtscheller, Gert

    Brain-computer interface (BCI) systems detect changes in brain signals that reflect human intention, then translate these signals to control monitors or external devices (for a comprehensive review, see [1]). BCIs typically measure electrical signals resulting from neural firing (i.e. neuronal action potentials, Electroencephalogram (ECoG), or Electroencephalogram (EEG)). Sophisticated pattern recognition and classification algorithms convert neural activity into the required control signals. BCI research has focused heavily on developing powerful signal processing and machine learning techniques to accurately classify neural activity [2-4].

  20. Predictive Function Control for Communication-Based Train Control (CBTC Systems

    Directory of Open Access Journals (Sweden)

    Bing Bu

    2013-01-01

    Full Text Available In Communication‐Based Train Control (CBTC systems, random transmission delays and packet drops are inevitable in the wireless networks, which could result in unnecessary traction, brakes or even emergency brakes of trains, losses of line capacity and passenger dissatisfaction. This paper applies predictive function control technology with a mixed H 2 / H ∞ control approach to improve the control performances. The controller is in the state feedback form and satisfies the requirement of quadratic input and state constraints. A linear matrix inequality (LMI approach is developed to solve the control problem. The proposed method attenuates disturbances by incorporating H 2 / H ∞ into the control scheme. The control command from the automatic train operation (ATO is included in the reward function to optimize the train’s running profile. The influence of transmission delays and packet drops is alleviated through improving the performances of the controller. Simulation results show that the method is effective to improve the performances and robustness of CBTC systems.

  1. Dynamic Optimization of Feedforward Automatic Gauge Control Based on Extended Kalman Filter

    Institute of Scientific and Technical Information of China (English)

    YANG Bin-hu; YANG Wei-dong; CHEN Lian-gui; QU Lei

    2008-01-01

    Automatic gauge control is an essentially nonlinear process varying with time delay, and stochastically varying input and process noise always influence the target gauge control accuracy. To improve the control capability of feedforward automatic gauge control, Kalman filter was employed to filter the noise signal transferred from one stand to another. The linearized matrix that the Kalman filter algorithm needed was concluded; thus, the feedforward automatic gauge control architecture was dynamically optimized. The theoretical analyses and simulation show that the proposed algorithm is reasonable and effective.

  2. Results of verifications of the control automatic exposure in equipment of RX with CR systems

    International Nuclear Information System (INIS)

    After the entry into force in 2012, the new Spanish Radiology quality control protocol lists and discusses the results obtained after verification of the automatic control of exposure in computed radiography systems. (Author)

  3. Radiation control through licensing and intensive training

    International Nuclear Information System (INIS)

    Various types of intensive training courses to suit radiation workers in different fields were sponsored by both the Atomic Energy Council of Executive Yuan and the National Health Administration of Executive Yuan, Republic of China during the past seven years. During the years 1974-79, the number of radiation workers attending each training course, their age, sex and educational background are presented in detail. The typical course contents for both medical and non-medical radiation workers are given. A summary of the percentage of passes and failures of the final examination given at the end of each training course is also given. The present status of licensing for radiation facilities and workers is described, and its results are indicated. The successful control of ionizing radiation through this kind of intensive training and licensing is evidenced in the film badge records given by a centralized service laboratory located at the National Tsing Hua University. (author)

  4. AUTOMATIC GENERATION CONTROL OF MULTI AREA POWER SYSTEMS USING ANN CONTROLLER

    Directory of Open Access Journals (Sweden)

    Bipasha Bhatia

    2012-07-01

    Full Text Available This paper presents the use of one of the methods of artificial intelligence to study the automatic generation control of interconnected power systems. In the given paper, a control line of track is established for interconnected three area thermal-thermal-thermal power system using generation rate constraints (GRC &Artificial Neural Network (ANN. The working of the controllers is simulated using MATLAB/SIMULINK package. The outputs using both controllers are compared and it is established that ANN based approach is better than GRC for 1% step load conditions.

  5. Automatic Tuning of PID Controller for a 1-D Levitation System Using a Genetic Algorithm

    DEFF Research Database (Denmark)

    Yang, Zhenyu; Pedersen, Gerulf K.m.

    2006-01-01

    The automatic PID control design for a onedimensional magnetic levitation system is investigated. The PID controller is automatically tuned using the non-dominated sorting genetic algorithm (NSGA-II) based on a nonlinear system model. The developed controller is digitally implemented and tested....... The preliminary simulation and test results show a bright potential to use artificial intelligence methods for supporting the control design for complicated nonlinear and open-loop unstable systems....

  6. Evaluation of automatic exposure control systems in computed tomography

    International Nuclear Information System (INIS)

    The development of the computed tomography (CT) technology has brought wider possibilities on diagnostic medicine. It is a non-invasive method to see the human body in details. As the CT application increases, it raises the concern about patient dose, because the higher dose levels imparted compared to other diagnostic imaging modalities. The radiology community (radiologists, medical physicists and manufacturer) are working together to find the lowest dose level possible, without compromising the diagnostic image quality. The greatest and relatively new advance to lower the patient dose is the automatic exposure control (AEC) systems in CT. These systems are designed to ponder the dose distribution along the patient scanning and between patients taking into account their sizes and irradiated tissue densities. Based on the CT scanning geometry, the AEC-systems are very complex and their functioning is yet not fully understood. This work aims to evaluate the clinical performance of AEC-systems and their susceptibilities to assist on possible patient dose optimizations. The approach to evaluate the AEC-systems of three of the leading CT manufacturers in Brazil, General Electric, Philips and Toshiba, was the extraction of tube current modulation data from the DICOM standard image sequences, measurement and analysis of the image noise of those image sequences and measurement of the dose distribution along the scan length on the surface and inside of two different phantoms configurations. The tube current modulation of each CT scanner associated to the resulted image quality provides the performance of the AECsystem. The dose distribution measurements provide the dose profile due to the tube current modulation. Dose measurements with the AEC-system ON and OFF were made to quantify the impact of these systems regarding patient dose. The results attained give rise to optimizations on the AEC-systems applications and, by consequence, decreases the patient dose without

  7. Nuclear demagnetization refrigerator with automatic control, pick up and data process system

    International Nuclear Information System (INIS)

    A nuclear demagnetization refrigerator for various physical research at ultralow temperatures with automatic control, pick up and data process system is developed . The design of the main units and performance of the refrigerator and automatic system are described. The possibilities of the set-up operation in various regimes are analyzed for the case of NMR investigation of helium quantum crystals

  8. The automatic control design and simulation of reactor control system in small modular reactor

    International Nuclear Information System (INIS)

    In China, the development and application goals of Small Modular Reactor (SMR) aim at electricity generation area, heat supply area, and seawater desalination area, etc. The main technical features of the SMR are as follows: integrated pressurized water reactor, reactor coolant pump and reactor pressure vessel connected by short pipe, steam generator sets in reactor pressure vessel, control rod drive mechanism (CRDM), pressure vessel, reactor internals, Once-Through Steam Generator (OTSG), and canned motor pump are all mature technology. Based on the characteristic of the reactor and OTSG, the automatic control design of the SMR is discussed in this paper, and the simulation results are presented to illustrate the control scheme. (author)

  9. Development of automatic exposure control for digital medical imaging system

    International Nuclear Information System (INIS)

    Image Intensifier based Digital Medical Imaging Systems are generally used for fluoroscopy investigations. Nevertheless these type of systems can also be used for radiography of extremities. For radiography mode the operator sets the required parameters like energy of X-ray (keV), intensity of X-ray (mA) and duration of exposure (ms) or total exposure (mAs) in the console depending on body part being examined. For skilled persons also sometimes it is difficult to estimate the optimum parameters due to patient thickness variation. This results in more or less exposure and the resultant image may not be useful for diagnostic purpose forcing in retake and additional dose to the patient. To avoid this an automatic exposure control (AEC) mechanism has been developed using the photodiode which is positioned in line with the output phosphor of the II Tube. Basically the photodiode sees the light output at the output phosphor (which is also seen by the CCD camera) and its associated circuit analyses the signal. Using AEC the operator has to set only kV and mA, duration of exposure will be controlled by the AEC circuitry. When AEC output reaches its set point, X-rays will be terminated. Commercially ion chamber based AEC are used for medical X-ray systems. We have developed the photodiode based AEC system which mimicks the working methodology of ion chamber based AEC system. The overall circuit incorporates a photodiode, integrator, inverter and a microcontroller for interface. Initial results obtained using the developed AEC has been encouraging. Quality grade diagnostic image of a hand anthropomorphic phantom has been obtained by using 42 kV, 0.2 mAs exposure. This is approximately half the dose required using the same system without using AEC and 20 times less when screen-film technique is used without AEC. Further development and experimentations are being carried out by varying the sensitivity of associated integrator circuitry for improving the performance of AEC

  10. Automatic combustion control in coke oven plants; Controle automatico de combustao em baterias de coque

    Energy Technology Data Exchange (ETDEWEB)

    Torres, Afonso E.; Bissoli, Aluizio R.; Clemente, Jose M.; Oliveira, Jorge M. de; Alves, Marcelo T.; Silva, Mauro R. da [Companhia Siderurgica de Tubarao (CST), Serra, ES (Brazil)

    1996-12-31

    The Automatic Combustion Control of the three Coke Ovens Plants of CST had its first stage started in january 1996, when the Visual Inspection of the Coking End Point was replaced by the Automatic Detection with a Process Computer and thermocouples in the ascension pipes of the 147 ovens. Monitoring is performed in the operations of charging, leveling, discharging, guiding and moving of the 12 movable machines (charging car, discharging car, guide car and locomotive), and safe integrated functioning among these machines is done, using one Plc in each one. The data from each oven are transmitted to the Process Computer by radio waves. Based on temperatures reached by thermocouples installed in the combustion chambers of 10 walls in each coke oven plant, and the automatic detection of weight and moisture of the coal, the Process Computer performs the calculation of the Set Point of the temperature for each coke oven plant. The mathematical model in the Process Computer is responsible for this result and the value is sent to the Plc, in the operation room, in order to control the rate of combustible gas, The cooking time is controlled by this method and the results of coke production are in the target range. (author) 9 figs., 3 tabs.

  11. Analysis and Design of PLC-based Control System for Automatic Beverage Filling Machine

    OpenAIRE

    Yundan Lu; Liangcai Zeng; Feilong Zheng; Gangsheng Kai

    2015-01-01

    Automatic filling system is the main equipment in the food machinery industry. With the development of beverage industry and increasing demand of the filling system. The relay control method in traditional Filling machine has low automation and integration level and cannot satisfy the rapid development of automatic production. PLC control method has advantages of simple programming, strong anti-interference and high working reliability, has gradually replace the relay control method. In this ...

  12. Automatic quality control in clinical (1) H MRSI of brain cancer.

    Science.gov (United States)

    Pedrosa de Barros, Nuno; McKinley, Richard; Knecht, Urspeter; Wiest, Roland; Slotboom, Johannes

    2016-05-01

    MRSI grids frequently show spectra with poor quality, mainly because of the high sensitivity of MRS to field inhomogeneities. These poor quality spectra are prone to quantification and/or interpretation errors that can have a significant impact on the clinical use of spectroscopic data. Therefore, quality control of the spectra should always precede their clinical use. When performed manually, quality assessment of MRSI spectra is not only a tedious and time-consuming task, but is also affected by human subjectivity. Consequently, automatic, fast and reliable methods for spectral quality assessment are of utmost interest. In this article, we present a new random forest-based method for automatic quality assessment of (1) H MRSI brain spectra, which uses a new set of MRS signal features. The random forest classifier was trained on spectra from 40 MRSI grids that were classified as acceptable or non-acceptable by two expert spectroscopists. To account for the effects of intra-rater reliability, each spectrum was rated for quality three times by each rater. The automatic method classified these spectra with an area under the curve (AUC) of 0.976. Furthermore, in the subset of spectra containing only the cases that were classified every time in the same way by the spectroscopists, an AUC of 0.998 was obtained. Feature importance for the classification was also evaluated. Frequency domain skewness and kurtosis, as well as time domain signal-to-noise ratios (SNRs) in the ranges 50-75 ms and 75-100 ms, were the most important features. Given that the method is able to assess a whole MRSI grid faster than a spectroscopist (approximately 3 s versus approximately 3 min), and without loss of accuracy (agreement between classifier trained with just one session and any of the other labelling sessions, 89.88%; agreement between any two labelling sessions, 89.03%), the authors suggest its implementation in the clinical routine. The method presented in this article was implemented

  13. Training cows to approach the milking unit in response to acoustic signals in an automatic milking system during the grazing season

    DEFF Research Database (Denmark)

    Wredle, E.; Munksgaard, Lene; Sporndly, E.

    2006-01-01

    connected to the automatic milking system. The cows were trained indoors using an operant conditioning technique. All cows had 12 training sessions with 7–12 signals given at variable intervals. An evaluation period followed the training period. During evaluation, the trained cows received an individual...... signal than after a control period with no signal (P < 0.05). There was a greater probability for the cows to respond to the signal if they were indoors (P < 0.05). The average milking interval for cows trained and evaluated in early season was 8.2 ± 0.44 h (±S.E.M.). The interval for a reference group...... (with no signal) in early season was 9.7 ± 0.18 h (P < 0.05). The intervals were 8.7 ± 0.56 h and 9.0 ± 0.20 h for the five cows trained in late season and a reference group (with no signal), respectively. During the evaluation in a full herd situation, the response ranged between 15 and 75% for...

  14. Automatic analysis of signals during Eddy currents controls

    International Nuclear Information System (INIS)

    A method and the corresponding instrument have been developed for automatic analysis of Eddy currents testing signals. This apparatus enables at the same time the analysis, every 2 milliseconds, of two signals at two different frequencies. It can be used either on line with an Eddy Current testing instrument or with a magnetic tape recorder

  15. Freezing of gait in Parkinson’s disease: disturbances in automaticity and control

    Directory of Open Access Journals (Sweden)

    Jochen Vandenbossche

    2013-01-01

    Full Text Available Recent studies emphasize a key role of controlled operations, such as set-shifting and inhibition, in the occurrence of freezing of gait (FOG in Parkinson’s disease (PD. However, FOG can also be characterized as a de-automatization disorder, showing impairments in both the execution and acquisition of automaticity. The observed deficits in automaticity and executive functioning indicate that both processes are malfunctioning in freezers. Therefore, to explain FOG from a cognitive-based perspective, we present a model describing the pathways involved in automatic and controlled processes prior to a FOG episode. Crucially, we focus on disturbances in automaticity and control, regulated by the frontostriatal circuitry. In complex situations, non-freezing PD patients may compensate for deficits in automaticity by switching to increased cognitive control. However, as both automatic and controlled processes are more severely impaired in freezers, this hampers cognitive compensation in FOG, resulting in a potential breakdown. Future directions for cognitive rehabilitation are proposed, based on the cognitive model we put forward.

  16. Automatic Generation Control Using PI Controller with Bacterial Foraging for both Thermal and Hydro Plants

    Directory of Open Access Journals (Sweden)

    Preeti Hooda,

    2014-06-01

    Full Text Available The load-frequency control (LFC is used to restore the balance between load and generation in each control area by means of speed control. In power system, the main goal of load frequency control (LFC or automatic generation control (AGC is to maintain the frequency of each area and tie- line power flow within specified tolerance by adjusting the MW outputs of LFC generators so as to accommodate fluctuating load demands. In this paper, attempt is made to make a scheme for automatic generation control within a restructured environment considering effects of contracts between DISCOs and GENCOs to make power system network in normal state where, GENCO used are hydro plants as well as thermal plants. The bacterial foraging optimization technique is being developed, which is applied to AGC in an interconnected four area system.The performance of the system is obtained by MATLAB Simulink tool. The results are shown in frequency and power response for four area AGC system. In this paper we have shown practical work by using thermal and hydro both system at Genco’s side.As reheated system transfer function is being used.

  17. Radiological control technician implementing continuing training

    International Nuclear Information System (INIS)

    The Westinghouse Hanford Company (WHC) has developed and is implementing a continuing training program for RCTs. This program was designed to meet the requirements of the DOE and Hanford Site Radiological Control Manual. The program is scheduled on a biennial (two year), six cycle format, where each cycle is seventeen weeks in length. This enables the technician to be in the classroom three times per year, for an average of four days each cycle. Content emphasis is placed on: academics review; lessons learned; new equipment and procedures; practical skills training; and oral board preparation. Academic reviews provide refresher training on core and site academics in both lecture and overview formats. During the first five cycles, an average of six lessons are presented. A preparatory exam is administered along with a quiz covering previous cycles. The sixth cycle is dedicated to an academic review of all previous lesson content, the final comprehensive exam, and the oral examination boards. In conjunction with continuing training, technicians receive additional company required training, providing a substantial cost savings to WHC. WHC employs approximately 300 RCTs

  18. ISS Contingency Attitude Control Recovery Method for Loss of Automatic Thruster Control

    Science.gov (United States)

    Bedrossian, Nazareth; Bhatt, Sagar; Alaniz, Abran; McCants, Edward; Nguyen, Louis; Chamitoff, Greg

    2008-01-01

    In this paper, the attitude control issues associated with International Space Station (ISS) loss of automatic thruster control capability are discussed and methods for attitude control recovery are presented. This scenario was experienced recently during Shuttle mission STS-117 and ISS Stage 13A in June 2007 when the Russian GN&C computers, which command the ISS thrusters, failed. Without automatic propulsive attitude control, the ISS would not be able to regain attitude control after the Orbiter undocked. The core issues associated with recovering long-term attitude control using CMGs are described as well as the systems engineering analysis to identify recovery options. It is shown that the recovery method can be separated into a procedure for rate damping to a safe harbor gravity gradient stable orientation and a capability to maneuver the vehicle to the necessary initial conditions for long term attitude hold. A manual control option using Soyuz and Progress vehicle thrusters is investigated for rate damping and maneuvers. The issues with implementing such an option are presented and the key issue of closed-loop stability is addressed. A new non-propulsive alternative to thruster control, Zero Propellant Maneuver (ZPM) attitude control method is introduced and its rate damping and maneuver performance evaluated. It is shown that ZPM can meet the tight attitude and rate error tolerances needed for long term attitude control. A combination of manual thruster rate damping to a safe harbor attitude followed by a ZPM to Stage long term attitude control orientation was selected by the Anomaly Resolution Team as the alternate attitude control method for such a contingency.

  19. Automatic control logics to eliminate xenon oscillation based on Axial Offsets Trajectory Method

    Energy Technology Data Exchange (ETDEWEB)

    Shimazu, Yoichiro [Mitsubishi Heavy Industries Ltd., Yokohama (Japan). Nuclear Energy Systems Engineering Center

    1996-06-01

    We have proposed Axial Offsets (AO) Trajectory Method for xenon oscillation control in pressurized water reactors. The features of this method are described as such that it can clearly give necessary control operations to eliminate xenon oscillations. It is expected that using the features automatic control logics for xenon oscillations can be simple and be realized easily. We investigated automatic control logics. The AO Trajectory Method could realize a very simple logic only for eliminating xenon oscillations. However it was necessary to give another considerations to eliminate the xenon oscillation with a given axial power distribution. The other control logic based on the modern control theory was also studied for comparison of the control performance of the new control logic. As the results, it is presented that the automatic control logics based on the AO Trajectory Method are very simple and effective. (author).

  20. Automatic control logics to eliminate xenon oscillation based on Axial Offsets Trajectory Method

    International Nuclear Information System (INIS)

    We have proposed Axial Offsets (AO) Trajectory Method for xenon oscillation control in pressurized water reactors. The features of this method are described as such that it can clearly give necessary control operations to eliminate xenon oscillations. It is expected that using the features automatic control logics for xenon oscillations can be simple and be realized easily. We investigated automatic control logics. The AO Trajectory Method could realize a very simple logic only for eliminating xenon oscillations. However it was necessary to give another considerations to eliminate the xenon oscillation with a given axial power distribution. The other control logic based on the modern control theory was also studied for comparison of the control performance of the new control logic. As the results, it is presented that the automatic control logics based on the AO Trajectory Method are very simple and effective. (author)

  1. An Ensemble-Based Training Data Refinement for Automatic Crop Discrimination Using WorldView-2 Imagery

    DEFF Research Database (Denmark)

    Chellasamy, Menaka; Ferre, Ty Paul; Greve, Mogens Humlekrog

    2015-01-01

    This paper presents a new approach for refining and selecting training data for satellite imagery-based crop discrimination. The goal of this approach is to automate the pixel-based “multievidence crop classification approach,” proposed by the authors in their previous research. The present study...... is used to feed this classification approach with automatically selected training samples based on available vector data (agricultural parcels representing crop boundaries with crop codes). The vector data are created by farmers to support subsidy claims and are, therefore, prone to errors such as...... boundary digitization mismatch and mislabeling of crop codes. The proposed approach, ensemble-based cluster refinement approach (ECRA), refines the declared crop clusters in an iterative training-classification scheme and provides potential training samples that give correct class descriptions. ECRA...

  2. Intelligent buildings, automatic fire alarm and fire-protection control system

    International Nuclear Information System (INIS)

    The author describes in brief the intelligent buildings, and the automatic fire alarm and fire-protection control system. On the basis of the four-bus, three-bus and two-bus, a new transfer technique was developed

  3. TRX Suspension Training: A New Functional Training Approach for Older Adults – Development, Training Control and Feasibility

    OpenAIRE

    GAEDTKE, ANGUS; Morat, Tobias

    2015-01-01

    Because of its proximity to daily activities functional training becomes more important for older adults. Sling training, a form of functional training, was primarily developed for therapy and rehabilitation. Due to its effects (core muscle activation, strength and balance improvements), sling training may be relevant for older adults. However, to our knowledge no recent sling training program for healthy older adults included a detailed training control which is indeed an essential component...

  4. Training of personnel for infection control.

    Science.gov (United States)

    Crow, S

    1984-01-01

    The overall objectives for implementing an infection control program are to make hospital personnel aware of nosocomial infections and to educate these persons in their role in decreasing the risk of these infections. The infection control practitioner (ICP) implements these objectives by performing surveillance to determine problem areas and by developing policies and procedures that prevent and control nosocomial infections. Appropriate qualities for an ICP include initiative, leadership, communication skills, commitment, and charisma. Expertise in patient care practices, aseptic principles, sterilization practices, education, research, epidemiology, microbiology, infectious diseases, and psychology are acquired skills. Local, state, and national organizations, as well as universities, are responsible for ICP training, In the US the Centers for Disease Control have established a training program for the beginning ICP and the Association of Practitioners in Infection Control (APIC) has developed a study guide for developing infection control skills. The ultimate responsibility for education is an individual obligation, however. Certification of the ICP would insure a minimum level of knowledge, thereby standardizing and upgrading the practice of infection control. PMID:6557085

  5. Shift Control System of Heavy-duty Vehicle Automatic Transmission

    OpenAIRE

    Yan Zhang; Wenxing Ma; Xuesong Li

    2013-01-01

    Heavy-duty vehicle hydrodynamic mechanical automatic transmission shifting operation system was designed, mathematical model of its simplified hydraulic system was established and simulation model of shifting operation system was established with AMESim, the simulation experiment was carried out, then oil pressure curves of each clutch hydraulic cylinder were obtained when giving forward gear or reverse gear signals. The simulation results show that shifting operating system meets the design ...

  6. Automatic detection of AutoPEEP during controlled mechanical ventilation

    Directory of Open Access Journals (Sweden)

    Nguyen Quang-Thang

    2012-06-01

    Full Text Available Abstract Background Dynamic hyperinflation, hereafter called AutoPEEP (auto-positive end expiratory pressure with some slight language abuse, is a frequent deleterious phenomenon in patients undergoing mechanical ventilation. Although not readily quantifiable, AutoPEEP can be recognized on the expiratory portion of the flow waveform. If expiratory flow does not return to zero before the next inspiration, AutoPEEP is present. This simple detection however requires the eye of an expert clinician at the patient’s bedside. An automatic detection of AutoPEEP should be helpful to optimize care. Methods In this paper, a platform for automatic detection of AutoPEEP based on the flow signal available on most of recent mechanical ventilators is introduced. The detection algorithms are developed on the basis of robust non-parametric hypothesis testings that require no prior information on the signal distribution. In particular, two detectors are proposed: one is based on SNT (Signal Norm Testing and the other is an extension of SNT in the sequential framework. The performance assessment was carried out on a respiratory system analog and ex-vivo on various retrospectively acquired patient curves. Results The experiment results have shown that the proposed algorithm provides relevant AutoPEEP detection on both simulated and real data. The analysis of clinical data has shown that the proposed detectors can be used to automatically detect AutoPEEP with an accuracy of 93% and a recall (sensitivity of 90%. Conclusions The proposed platform provides an automatic early detection of AutoPEEP. Such functionality can be integrated in the currently used mechanical ventilator for continuous monitoring of the patient-ventilator interface and, therefore, alleviate the clinician task.

  7. The TS 600: automatic control system for eddy currents

    International Nuclear Information System (INIS)

    In the scope of fabrication and in service inspection of the PWR steam generator tubing bendle, FRAMATOME developed an automatic Eddy Current testing system: TS600. Based on a mini-computer, TS600 allows to digitize, to store and to process data in various ways, so it is possible to perform several kinds of inspection: conventional inservice inspection, roll area profilometry...... TS600 can also be used to develop new methods of examination

  8. Implementation of a remote computer controlled automatic guided vehicle

    OpenAIRE

    Lu, Roberto F.

    1994-01-01

    The effectiveness of a material handling system is essential to a competitive manufacturing environment. Automatic Guided Vehicles (AGVs) are an irnportant technology within today's modern manufacturing facility. Academic programs in manufacturing and industrial engineering must find ways to include this technology in their instructional and research programs to provide the students with sufficient knowledge to address material handling systems design. This project was a fir...

  9. Automatic velocity control in cutting-off machines

    OpenAIRE

    Machado, Carlos; Fonseca, Jaime C.; Mendes, José A.

    2003-01-01

    Usually, automatic cutting-off machines, of metallic pipes or bars, use constant cutting velocity. This mode of operation, constant cutting velocity combined with different profiles of materials to be cut, causes variable cutting forces to be applied to the saw. As a result, the cutting off machine is generally set for the worst expected conditions, otherwise excessive wear of the saw and machine will occur. Further, traditional cutting-off machines require adjustments to be made in order to ...

  10. The development of automatic and controlled inhibitory retrieval processes in true and false recall

    OpenAIRE

    Knott, L.; Howe, M. L.; Wimmer, M. C.; Dewhurst, S

    2011-01-01

    In three experiments we investigated the role of automatic and controlled inhibitory retrieval processes in true and false memory development in children and adults. Experiment 1 incorporated a directed forgetting task to examine controlled retrieval inhibition. Experiments 2 and 3 utilized a part-set cue and retrieval practice task to examine automatic retrieval inhibition. In the first experiment, the forget cue had no effect on false recall for adults but reduced false recall for children....

  11. Observer Based Traction/Braking Control Design for High Speed Trains Considering Adhesion Nonlinearity

    Directory of Open Access Journals (Sweden)

    Wenchuan Cai

    2014-01-01

    Full Text Available Train traction/braking control, one of the key enabling technologies for automatic train operation, literally takes its action through adhesion force. However, adhesion coefficient of high speed train (HST is uncertain in general because it varies with wheel-rail surface condition and running speed; thus, it is extremely difficult to be measured, which makes traction/braking control design and implementation of HSTs greatly challenging. In this work, force observers are applied to estimate the adhesion force or/and the resistance, based on which simple traction/braking control schemes are established under the consideration of actual wheel-rail adhesion condition. It is shown that the proposed controllers have simple structure and can be easily implemented from real applications. Numerical simulation also validates the effectiveness of the proposed control scheme.

  12. Tailoring automatic exposure control toward constant detectability in digital mammography

    Energy Technology Data Exchange (ETDEWEB)

    Salvagnini, Elena, E-mail: elena.salvagnini@uzleuven.be [Department of Imaging and Pathology, Medical Physics and Quality Assessment, KUL, Herestraat 49, Leuven B-3000, Belgium and SCK-CEN, Boeretang 200, Mol 2400 (Belgium); Bosmans, Hilde [Department of Imaging and Pathology, Medical Physics and Quality Assessment, KUL, Herestraat 49, Leuven B-3000, Belgium and Department of Radiology, UZ Gasthuisberg, Herestraat 49, Leuven B-3000 (Belgium); Struelens, Lara [SCK-CEN, Boeretang 200, Mol 2400 (Belgium); Marshall, Nicholas W. [Department of Radiology, UZ Gasthuisberg, Herestraat 49, Leuven B-3000 (Belgium)

    2015-07-15

    Purpose: The automatic exposure control (AEC) modes of most full field digital mammography (FFDM) systems are set up to hold pixel value (PV) constant as breast thickness changes. This paper proposes an alternative AEC mode, set up to maintain some minimum detectability level, with the ultimate goal of improving object detectability at larger breast thicknesses. Methods: The default “OPDOSE” AEC mode of a Siemens MAMMOMAT Inspiration FFDM system was assessed using poly(methyl methacrylate) (PMMA) of thickness 20, 30, 40, 50, 60, and 70 mm to find the tube voltage and anode/filter combination programmed for each thickness; these beam quality settings were used for the modified AEC mode. Detectability index (d′), in terms of a non-prewhitened model observer with eye filter, was then calculated as a function of tube current-time product (mAs) for each thickness. A modified AEC could then be designed in which detectability never fell below some minimum setting for any thickness in the operating range. In this study, the value was chosen such that the system met the achievable threshold gold thickness (T{sub t}) in the European guidelines for the 0.1 mm diameter disc (i.e., T{sub t} ≤ 1.10 μm gold). The default and modified AEC modes were compared in terms of contrast-detail performance (T{sub t}), calculated detectability (d′), signal-difference-to-noise ratio (SDNR), and mean glandular dose (MGD). The influence of a structured background on object detectability for both AEC modes was examined using a CIRS BR3D phantom. Computer-based CDMAM reading was used for the homogeneous case, while the images with the BR3D background were scored by human observers. Results: The default OPDOSE AEC mode maintained PV constant as PMMA thickness increased, leading to a reduction in SDNR for the homogeneous background 39% and d′ 37% in going from 20 to 70 mm; introduction of the structured BR3D plate changed these figures to 22% (SDNR) and 6% (d′), respectively

  13. Three machine learning techniques for automatic determination of rules to control locomotion.

    Science.gov (United States)

    Jonić, S; Janković, T; Gajić, V; Popović, D

    1999-03-01

    Automatic prediction of gait events (e.g., heel contact, flat foot, initiation of the swing, etc.) and corresponding profiles of the activations of muscles is important for real-time control of locomotion. This paper presents three supervised machine learning (ML) techniques for prediction of the activation patterns of muscles and sensory data, based on the history of sensory data, for walking assisted by a functional electrical stimulation (FES). Those ML's are: 1) a multilayer perceptron with Levenberg-Marquardt modification of backpropagation learning algorithm; 2) an adaptive-network-based fuzzy inference system (ANFIS); and 3) a combination of an entropy minimization type of inductive learning (IL) technique and a radial basis function (RBF) type of artificial neural network with orthogonal least squares learning algorithm. Here we show the prediction of the activation of the knee flexor muscles and the knee joint angle for seven consecutive strides based on the history of the knee joint angle and the ground reaction forces. The data used for training and testing of ML's was obtained from a simulation of walking assisted with an FES system [39]. The ability of generating rules for an FES controller was selected as the most important criterion when comparing the ML's. Other criteria such as generalization of results, computational complexity, and learning rate were also considered. The minimal number of rules and the most explicit and comprehensible rules were obtained by ANFIS. The best generalization was obtained by the IL and RBF network. PMID:10097465

  14. Automatic resource identification for FPGA-based reconfigurable measurement and control systems with mezzanines in FMC standard

    Science.gov (United States)

    Wojenski, Andrzej; Kasprowicz, Grzegorz; Pozniak, Krzysztof T.; Romaniuk, Ryszard

    2013-10-01

    The paper describes a concept of automatic resources identification algorithm used in reconfigurable measurement systems. In the paper is also presented a concept of algorithm for automatic generation of HDL codes (firmware) and management of reconfigurable measurement and control systems. Following sections are described in details: definition of measurement system, FMC boards installation, automatic FPGA startup configuration, automatic FMC detection and automatic card identification. Reconfigurable measurement and control systems are using FPGA devices and mezzanines in FMC standard. This work is a part of a wider project for automatic firmware generation and management of reconfigurable systems.

  15. Development and implementation of an automatic control algorithm for the University of Utah nuclear reactor

    International Nuclear Information System (INIS)

    The emphasis of this work is the development and implementation of an automatic control philosophy which uses the classical operational philosophies as a foundation. Three control algorithms were derived based on various simplifying assumptions. Two of the algorithms were tested in computer simulations. After realizing the insensitivity of the system to the simplifications, the most reduced form of the algorithms was implemented on the computer control system at the University of Utah (UNEL). Since the operational philosophies have a higher priority than automatic control, they determine when automatic control may be utilized. Unlike the operational philosophies, automatic control is not concerned with component failures. The object of this philosophy is the movement of absorber rods to produce a requested power. When the current power level is compared to the requested power level, an error may be detected which will require the movement of a control rod to correct the error. The automatic control philosophy adds another dimension to the classical operational philosophies. Using this philosophy, normal operator interactions with the computer would be limited only to run parameters such as power, period, and run time. This eliminates subjective judgements, objective judgements under pressure, and distractions to the operator and insures the reactor will be operated in a safe and controlled manner as well as providing reproducible operations

  16. Automatic SIMD vectorization of SSA-based control flow graphs

    CERN Document Server

    Karrenberg, Ralf

    2015-01-01

    Ralf Karrenberg presents Whole-Function Vectorization (WFV), an approach that allows a compiler to automatically create code that exploits data-parallelism using SIMD instructions. Data-parallel applications such as particle simulations, stock option price estimation or video decoding require the same computations to be performed on huge amounts of data. Without WFV, one processor core executes a single instance of a data-parallel function. WFV transforms the function to execute multiple instances at once using SIMD instructions. The author describes an advanced WFV algorithm that includes a v

  17. Using a fully automatic mass spectrometer for fissile material control

    International Nuclear Information System (INIS)

    The demand for higher accuracy and a shorter delay in the analysis together with better objectifiability and data security needed in safeguards, lead to the automation of a mass spectrometer. Starting with a continuous feeding of samples via a high vacuum lock and including the subsequent heating, focussing and scanning of the samples as well as the final evaluation of the source data (taking alpha spectrometry and the weights required for the isotope dilution technique into account), the mass spectrometric procedure was completely automated. For this purpose, a serial CH-5 instrument of varian mat was modified to be operated by a varian 620/I computer. A newly developed three chamber high vacuum lock was attached to this system and the final evaluation is made with an IBM 370. The system has been used in operation for the isotope analysis of U, Pu and Nd for one year. Major breakdowns of the hardware did not occur, however, the computer programmes had to be steadily improved according to the changing characteristics of the samples. Compared to manual operation, the automat is superior in its throughput and speed of analysing series of similar samples. The automatic procedure objectifies the analysis and the complete evaluation ensures a better data security. (Orig./HP). (author)

  18. Auxiliary control system for irradiation specimen automatic transmission based on configuration software

    International Nuclear Information System (INIS)

    Auxiliary control system realizes sequential control and trace display and automatic transmission for irradiated specimen, which bases on configuration software (MCGS) and industrial control computer as the control platform. The system uses digital I/O cards to establish system state detection and output control arrays. It is showed that the structure posses stable, reliable and security characteristics and well meets the needs of specimen transmission and controlling in industrial automation. (authors)

  19. Design of multi-point automatic positioning pre-programmed crane control system

    International Nuclear Information System (INIS)

    This automatic positioning system is designed for the crane which is in common use. The crane hall is cut into several parts, the position is detected by the photoelectric switches, and the PLC and inverter are used for the control devices. The automatic positioning control of the crane is completed by means of the timing movement. The positioning error is less than 2.1 cm, the swing range when lifting object is less than 5.7 cm, and the average speed of the crane is more than 90% of the rated speed. This paper gives further description in the positioning control, direction control, speed control and the identification of the starting point. Finally it gives an analysis of the automatic positioning performance. (authors)

  20. Analysis and Design of PLC-based Control System for Automatic Beverage Filling Machine

    Directory of Open Access Journals (Sweden)

    Yundan Lu

    2015-01-01

    Full Text Available Automatic filling system is the main equipment in the food machinery industry. With the development of beverage industry and increasing demand of the filling system. The relay control method in traditional Filling machine has low automation and integration level and cannot satisfy the rapid development of automatic production. PLC control method has advantages of simple programming, strong anti-interference and high working reliability, has gradually replace the relay control method. In this study, hardware and software for the automatic filling system based on PLC control is designed, especially the injection section servo control system which adopts the servo motor driver metering pump is carefully analyzed and the filling precision is highly improved.

  1. Automatic Generation Control Strategy Based on Balance of Daily Electric Energy

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    An automatic generation control strategy based on balance of daily total electric energy is put forward. It makes the balance between actual total generated energy controlled by automatic generation system and planned total energy on base of area control error, and makes the actual 24-hour active power load curve to approach the planned load curve. The generated energy is corrected by velocity weighting factor so that it conducts dynamic regulation and reaches the speed of response. Homologous strategy is used according to the real-time data in the operation of automatic generation control. Results of simulation are perfect and power energy compensation control with ideal effect can be achieved in the particular duration.

  2. Automatic subject classification of textual documents using limited or no training data

    OpenAIRE

    Joorabchi, Arash

    2010-01-01

    With the explosive growth in the number of electronic documents available on the internet, intranets, and digital libraries, there is a growing need for automatic systems capable of indexing and organising such large volumes of data more that ever. Automatic Text Classification (ATC) has become one of the principal means for enhancing the performance of information retrieval systems and organising digital libraries and other textual collections. Within this context, the use of ...

  3. AUTOMATIC CONTROL SYSTEM OF THE DRUM BOILER SUPERHEATED STEAM TEMPERATURE.

    OpenAIRE

    Juravliov A.A.; Sit M.L.; Poponova O.B.; Sit B.B.; Zubatii A.L.

    2006-01-01

    The control system of the temperature of the superheated steam of the drum boiler is examined. Main features of the system are the PI-controller in the external control loop and introduction of the functional component of the error signal of the external control loop with the negative feedback of the error signal between the prescribed value of steam flowrate and the signal of the steam flowrate in the exit of the boiler in the internal control loop.

  4. AUTOMATIC CONTROL SYSTEM OF THE DRUM BOILER SUPERHEATED STEAM TEMPERATURE.

    Directory of Open Access Journals (Sweden)

    Juravliov A.A.

    2006-04-01

    Full Text Available The control system of the temperature of the superheated steam of the drum boiler is examined. Main features of the system are the PI-controller in the external control loop and introduction of the functional component of the error signal of the external control loop with the negative feedback of the error signal between the prescribed value of steam flowrate and the signal of the steam flowrate in the exit of the boiler in the internal control loop.

  5. ANALYSIS OF EXISTING AND PROSPECTIVE TECHNICAL CONTROL SYSTEMS OF NUMERIC CODES AUTOMATIC BLOCKING

    Directory of Open Access Journals (Sweden)

    A. M. Beznarytnyy

    2013-09-01

    Full Text Available Purpose. To identify the characteristic features of the engineering control measures system of automatic block of numeric code, identifying their advantages and disadvantages, to analyze the possibility of their use in the problems of diagnosing status of the devices automatic block and setting targets for the development of new diagnostic systems. Methodology. In order to achieve targets the objective theoretical and analytical method and the method of functional analysis have been used. Findings. The analysis of existing and future facilities of the remote control and diagnostics automatic block devices had shown that the existing systems of diagnosis were not sufficiently informative, designed primarily to control the discrete parameters, which in turn did not allow them to construct a decision support subsystem. In developing of new systems of technical diagnostics it was proposed to use the principle of centralized distributed processing of diagnostic data, to include a subsystem support decision-making in to the diagnostics system, it will reduce the amount of work to maintain the devices blocking and reduce recovery time after the occurrence injury. Originality. As a result, the currently existing engineering controls facilities of automatic block can not provide a full assessment of the state distillation alarms and locks. Criteria for the development of new systems of technical diagnostics with increasing amounts of diagnostic information and its automatic analysis were proposed. Practical value. These results of the analysis can be used in practice in order to select the technical control of automatic block devices, as well as the further development of diagnostic systems automatic block that allows for a gradual transition from a planned preventive maintenance service model to the actual state of the monitored devices.

  6. Peer-led training in basic life support and resuscitation using an automatic external defibrillator

    DEFF Research Database (Denmark)

    Løfgren, Bo; Petersen, Christina Børlum; Mikkelsen, Ronni;

    2009-01-01

    Peer-led training has been identified as a useful tool for delivering undergraduate healthcare training. In this paper we describe the implementation of the European Resuscitation Council BLS/AED Course as a peer-led training program for medical students....

  7. Use of control room simulators for training of NPP personnel

    International Nuclear Information System (INIS)

    The objective of this report is to provide NPP managers, training center managers and personnel involved with control room simulator training with practical information they can use to improve the performance of their personnel. While the emphasis in this report is on simulator training of control room personnel using full scope simulators, information is also provided on how organizations have effectively used control room simulators for training of other NPP Personnel, Vienna (AT) including simulators other than full-scope simulators. The documents includes: the main body with current practices and recommendations; selected examples from countries; a CD ROM with all examples (different languages). The document will be available on the IAEA web site. The topics describes are: trends in simulators training; designing and developing training involving room simulators; implementation of simulator training; evaluating the effectiveness of simulator training; simulator instructor competence; application of different types of simulators in the training of NPP personnel (other than full scope simulators

  8. Shift Control System of Heavy-duty Vehicle Automatic Transmission

    Directory of Open Access Journals (Sweden)

    Yan Zhang

    2013-12-01

    Full Text Available Heavy-duty vehicle hydrodynamic mechanical automatic transmission shifting operation system was designed, mathematical model of its simplified hydraulic system was established and simulation model of shifting operation system was established with AMESim, the simulation experiment was carried out, then oil pressure curves of each clutch hydraulic cylinder were obtained when giving forward gear or reverse gear signals. The simulation results show that shifting operating system meets the design requirements, and verify the correctness of the model. The shift timing is correct, and there is no power interruption or gear overlap during the shift transition process. Joint oil pressure of designed system is stable, and shifting shock is small. The research results are providing the basis for further study of shifting operation system and a reasonable platform for the studying of shift schedule and quality. The theoretical design method and dynamic simulation experiment will be feasible for the real industrial applications. The research results can be used in design and optimization of hydraulic system

  9. EXPERIMENTAL INVESTIGATION OF TIME DELAYS DATA TRANSMISSION IN AUTOMATIC CONTROL SYSTEMS

    OpenAIRE

    RYABENKIY Vladimir Mikhailovich; USHKARENKO Alexander Olegovich

    2015-01-01

    The method of statistical analysis of time-delay transmission of information and control packets over the network in automatic control systems are considered in this article. The results of measurements of time delays, which are obtained based on the analytic dependence of the probability density allow theoretically determine the time delays for data transmission.

  10. The Development of Automatic and Controlled Inhibitory Retrieval Processes in True and False Recall

    Science.gov (United States)

    Knott, Lauren M.; Howe, Mark L.; Wimmer, Marina C.; Dewhurst, Stephen A.

    2011-01-01

    In three experiments, we investigated the role of automatic and controlled inhibitory retrieval processes in true and false memory development in children and adults. Experiment 1 incorporated a directed forgetting task to examine controlled retrieval inhibition. Experiments 2 and 3 used a part-set cue and retrieval practice task to examine…

  11. Automatic control and monitoring of the MIT fission converter beam

    International Nuclear Information System (INIS)

    An automated control and monitoring system for the new MIT high intensity epithermal neutron irradiation facility has been designed and constructed. The neutron beam is monitored with fission counters located at the periphery of the beam near the patient position. Control of the beam is accomplished with redundant Programmable Logic Controllers (PLCs). These industrial controllers open and close the three shutters of the Fission Converter Beam. The control system uses a series of robust components to assure that the prescribed fluence is delivered. This paper discusses the design and implementation of this system. (author)

  12. Method and apparatus for automatic control of a humanoid robot

    Science.gov (United States)

    Abdallah, Muhammad E (Inventor); Platt, Robert (Inventor); Wampler, II, Charles W. (Inventor); Reiland, Matthew J (Inventor); Sanders, Adam M (Inventor)

    2013-01-01

    A robotic system includes a humanoid robot having a plurality of joints adapted for force control with respect to an object acted upon by the robot, a graphical user interface (GUI) for receiving an input signal from a user, and a controller. The GUI provides the user with intuitive programming access to the controller. The controller controls the joints using an impedance-based control framework, which provides object level, end-effector level, and/or joint space-level control of the robot in response to the input signal. A method for controlling the robotic system includes receiving the input signal via the GUI, e.g., a desired force, and then processing the input signal using a host machine to control the joints via an impedance-based control framework. The framework provides object level, end-effector level, and/or joint space-level control of the robot, and allows for functional-based GUI to simplify implementation of a myriad of operating modes.

  13. Realization of the ergonomics design and automatic control of the fundus cameras

    Science.gov (United States)

    Zeng, Chi-liang; Xiao, Ze-xin; Deng, Shi-chao; Yu, Xin-ye

    2012-12-01

    The principles of ergonomics design in fundus cameras should be extending the agreeableness by automatic control. Firstly, a 3D positional numerical control system is designed for positioning the eye pupils of the patients who are doing fundus examinations. This system consists of a electronically controlled chin bracket for moving up and down, a lateral movement of binocular with the detector and the automatic refocusing of the edges of the eye pupils. Secondly, an auto-focusing device for the object plane of patient's fundus is designed, which collects the patient's fundus images automatically whether their eyes is ametropic or not. Finally, a moving visual target is developed for expanding the fields of the fundus images.

  14. [An automatic torque control system for a bicycle ergometer equipped with an eddy current brake].

    Science.gov (United States)

    Kikinev, V V

    2007-01-01

    The main elements of the loading device of a bicycle ergometer, including an eddy current brake and a torque sensor, are described. The automatic torque control system, which includes the loading device, is equipped with a stabilizing feedback controller that optimally approximates the closed-loop transfer function of the target model. The reduced transfer function model of the controller is of the fourth order. A method featuring a modulation-demodulation loop is suggested for implementation of the control system. PMID:17598478

  15. Mathematical modelling and quality indices optimization of automatic control systems of reactor facility

    International Nuclear Information System (INIS)

    The mathematical modeling of automatic control systems of reactor facility WWER-1000 with various regulator types is considered. The linear and nonlinear models of neutron power control systems of nuclear reactor WWER-1000 with various group numbers of delayed neutrons are designed. The results of optimization of direct quality indexes of neutron power control systems of nuclear reactor WWER-1000 are designed. The identification and optimization of level control systems with various regulator types of steam generator are executed

  16. Adaptive Clutch Engaging Process Control for Automatic Mechanical Transmission

    Institute of Scientific and Technical Information of China (English)

    LIU Hai-ou; CHEN Hui-yan; DING Hua-rong; HE Zhong-bo

    2005-01-01

    Based on detail analysis of clutch engaging process control targets and adaptive demands, a control strategy which is based on speed signal, different from that of based on main clutch displacement signal, is put forward. It considers both jerk and slipping work which are the most commonly used quality evaluating indexes of vehicle starting phase. The adaptive control system and its reference model are discussed profoundly.Taking the adaptability to different starting gears and different road conditions as examples, some proving field test records are shown to illustrate the main clutch adaptive control strategy at starting phase. Proving field test gives acceptable results.

  17. Methodology of automatic quality control of aluminium castings

    Directory of Open Access Journals (Sweden)

    J.H. Sokolowski

    2007-01-01

    Full Text Available Purpose: Employment of the artificial intelligence tools for development of the methodology of the automatedassessment of quality and structural defects in the Al and Mg alloys and the custom made computer softwarewill make it possible to determine the quality of the manufactured element based on the digital images registeredin the X-ray flaw detection examinations. The possibility to correlate the frequency and morphology of defectswith the technological process parameters will make it also possible to identify and classify these defects andcontrol the process to minimise and eliminate them.Design/methodology/approach: The developed design methodologies both the material and technologicalones will make it possible to improve shortly the quality of materials from the light alloys in the technologicalprocess, and the automatic process flow correction will make the production cost reduction possible, and - firstof all - to reduce the amount of the waste products.Findings: The merit of the project consists in the interdisciplinary joining of the knowledge in the area oflight metal alloys, including Al and/or Mg, in the area of materials processing connected with the entire scopeof problems connected with manufacturing of products and their elements, in the area of the automated lowpressuredie casting, and also in the methodology of structure and properties assessment of the engineeringmaterials with, among others, the X-ray flaw detection and computer image analysis methods.Practical implications: The developed methodology of the automated assessment of quality and properties ofthe light Al and Mg based alloys may be used by manufacturers of subassemblies and elements of engines (e.g.,car engine bodies made from the light alloys with the low-pressure casting in the sand moulds.Originality/value: The project’s effects will be shortening the time needed for analyses and elimination of manusubjective evaluation errors made by humans.

  18. Method of energy efficiency of residential house by implementing of automatic controlled heat metering system

    Directory of Open Access Journals (Sweden)

    Taisiya Olegovna Zadvinskaya

    2014-08-01

    Full Text Available The method of increasing the efficiency of heat energy describes in this article. The method is based on installation of heat metering system and automatic controlled domestic heating plant in residential building. An example of comparative calculation of the heat input and estimation for heat energy in a typical residential building, according to different methods which are used for the calculation of extra charge by the energy supplier, in the presence of the heat metering system and automatic controlled domestic heating plant and without. Payback period of the proposed activities was calculated.

  19. A modern automatic Carriage-Trolley Position Control System for Dhruva fuelling machine

    International Nuclear Information System (INIS)

    A fully automatic absolute encoder based position control system has been designed developed implemented and commissioned for the Dhruva Fuelling Machine A (FM/A). This supports both the coarse and fine positioning modes. Provision for fully manual positioning as a standby system has been retained. This system replaces the ageing peg counting based incremental positioner used briefly during the early period after the Dhruva FM/A was commissioned. The older system suffered from peg detection skipping problems; hence it was not being used. Only full manual positioning was being carried out. This paper describes the automatic Carriage Trolley Position Control System (CTPCS). (author)

  20. Improvement of remote control system of automatic ultrasonic equipment for inspection of reactor pressure vessel

    International Nuclear Information System (INIS)

    One of the important issues related to the nuclear safety is in-service inspection of reactor pressure vessel (RPV). A remote controlled automatic ultrasonic method is applied to the inspection. At present the automatic ultrasonic inspection system owned by KAERI is interrupted due to degradation of parts. In order to resume field inspection new remote control system for the equipment was designed and installed to the existing equipment. New ultrasonic sensors and their modules for RPV inspection were designed and fabricated in accordance with the new requirements of the inspection codes. Ultrasonic sensors were verified for the use in the RPV inspection. (author)

  1. Using Spec Explorer for Automatic Checking of Constraints in Software Controlled Systems.

    Directory of Open Access Journals (Sweden)

    Izzat Mahmoud ALSMADI

    2011-01-01

    Full Text Available In software engineering, several formal models and tools are proposed for defining system requirements and constraints formally. Such formal definitions can help in the automatic checking and verification for them. It can also help in the automatic test case generation, execution and verification. In this paper, we will demonstrate and evaluate the usage of Spec Explorer from Microsoft for defining and checking examples of software controlled system such as cruise control. Such formal requirements can be eventually embedded in the developed system or can help in exposing important elements to test in the testing stage or through the usage of the application

  2. Improvement of remote control system of automatic ultrasonic equipment for inspection of reactor pressure vessel

    Energy Technology Data Exchange (ETDEWEB)

    Cheong, Yong Moo; Jung, H. K.; Joo, Y. S.; Koo, K. M.; Hyung, H.; Sim, C. M.; Gong, U. S.; Kim, S. H.; Lee, J. P.; Rhoo, H. C.; Kim, M. S.; Ryoo, S. K.; Choi, C. H.; Oh, K. I

    1999-12-01

    One of the important issues related to the nuclear safety is in-service inspection of reactor pressure vessel (RPV). A remote controlled automatic ultrasonic method is applied to the inspection. At present the automatic ultrasonic inspection system owned by KAERI is interrupted due to degradation of parts. In order to resume field inspection new remote control system for the equipment was designed and installed to the existing equipment. New ultrasonic sensors and their modules for RPV inspection were designed and fabricated in accordance with the new requirements of the inspection codes. Ultrasonic sensors were verified for the use in the RPV inspection. (autho0008.

  3. Automatic micropart assembly of 3-Dimensional structure by vision based control

    International Nuclear Information System (INIS)

    We propose a vision control strategy to perform automatic microassembly tasks in three-dimension (3-D) and develop relevant control software: specifically, using a 6 degree-of-freedom (DOF) robotic workstation to control a passive microgripper to automatically grasp a designated micropart from the chip, pivot the micropart, and then move the micropart to be vertically inserted into a designated slot on the chip. In the proposed control strategy, the whole microassembly task is divided into two subtasks, micro-grasping and micro-joining, in sequence. To guarantee the success of microassembly and manipulation accuracy, two different two-stage feedback motion strategies, the pattern matching and auto-focus method are employed, with the use of vision-based control system and the vision control software developed. Experiments conducted demonstrate the efficiency and validity of the proposed control strategy

  4. PLC based automatic control of pasteurize mix in ice cream production

    Science.gov (United States)

    Yao, Xudong; Liang, Kai

    2013-03-01

    This paper describes the automatic control device of pasteurized mix in the ice cream production process.We design a scheme of control system using FBD program language and develop the programmer in the STEP 7-Micro/WIN software, check for any bugs before downloading into PLC .These developed devices will able to provide flexibility and accuracy to control the step of pasteurized mix. The operator just Input the duration and temperature of pasteurized mix through control panel. All the steps will finish automatically without any intervention in a preprogrammed sequence stored in programmable logic controller (PLC). With the help of this equipment we not only can control the quality of ice cream for various conditions, but also can simplify the production process. This control system is inexpensive and can be widely used in ice cream production industry.

  5. Automatic Control of Contextual Interaction Integrated with Affection and Architectural Attentional Control

    Directory of Open Access Journals (Sweden)

    Yanrong Jiang

    2013-03-01

    Full Text Available It is still a challenge for robots to interact with complex environments in a smooth and natural manner. The robot should be aware of its surroundings and inner status to make decisions accordingly and appropriately. Contexts benefit the interaction a lot, such as avoiding frequent interruptions (e.g., the explicit inputting requests and thus are essential for interaction. Other challenges, such as shifting attentional focus to a more important stimulus, etc., are also crucial in interaction control. This paper presents a hybrid automatic control approach for interaction, as well as its integration, with these multiple important factors, aiming at performing natural, human‐like interactions in robots. In particular, a novel approach of architectural attentional control, based on affection is presented, which attempts to shift the attentional focus in a natural manner. Context‐aware computing is combined with interaction to endow the robot with proactive abilities. The long‐term interaction control approaches are described. Emotion and personality are introduced into the interaction and their influence mechanism on interaction is explored. We implemented the proposal in an interactive head robot (IHR and the experimental results indicate the effectiveness.

  6. Development of Full Automatic Flash Butt Welding with Digital Control

    Institute of Scientific and Technical Information of China (English)

    WANG Rui; SUN Hexu; WANG Hongwen

    2006-01-01

    The hardware and software design of two digital control systems based on 80C196KB MCU for flash butt welder is introduced in this paper. The welding power supply is made of six-phase half-wave rectifier. The welding outer characteristic of welding machine is realized by digital PI algorithm with the voltage close-loop feedback. The flashing curve is finished by electric-hydraulic servo valve .The process control system transfers datum with power supply system by a serial communication interface. The parameters of the control systems are collected by photoelectrical seclusion to avoid the disturbing of the electromagnetism in welding process.

  7. Research on automatic correction of electronic beam path for distributed control

    International Nuclear Information System (INIS)

    Background: Dynamitron, an electron irradiation accelerator of high-voltage, is used as a radiation source for industrial and agricultural production. The control system is an important component of dynamitron. Purpose: The aim is to improve the control system to meet the performance requirements of dynamitron for the stability. Methods: A distributed control system for the 1.5-MeV dynamitron is proposed to gain better performance. On this basis, an electron beam trajectory automatic correction method based on Cerebellar Model Articulation Controller and Proportional-Integral Derivative (CMAC-PID) controller is designed to improve the function of electron beam extraction system. Results: The distributed control system can meet the control requirements of the accelerator. The stability of the CMAC PID controller is better than that of conventional PID controller for the electron beam trajectory automatic correction system, and hence the CMAC-PID controller can provide better protection of dynamitron when electron beam deflection occurs. Conclusion: The distributed control system and the electron beam trajectory automatic correction method system can effectively improve the performance and reduce the failure probability of the accelerator, thereby enhancing the efficiency of the accelerator. (authors)

  8. Automatic method of measuring silicon-controlled-rectifier holding current

    Science.gov (United States)

    Maslowski, E. A.

    1972-01-01

    Development of automated silicon controlled rectifier circuit for measuring minimum anode current required to maintain rectifiers in conducting state is discussed. Components of circuit are described and principles of operation are explained. Illustration of circuit is provided.

  9. Developing and Evaluating an Oral Skills Training Website Supported by Automatic Speech Recognition Technology

    Science.gov (United States)

    Chen, Howard Hao-Jan

    2011-01-01

    Oral communication ability has become increasingly important to many EFL students. Several commercial software programs based on automatic speech recognition (ASR) technologies are available but their prices are not affordable for many students. This paper will demonstrate how the Microsoft Speech Application Software Development Kit (SASDK), a…

  10. Research on HCI Prototype Design of Ink Automatic Control System for Offset Printer

    Institute of Scientific and Technical Information of China (English)

    ZHANG Jianyu; GAO Lixin; CUI Lingli; WANG Yingwang; LI Xianghui

    2006-01-01

    In order to solve the low efficiency and poor precision problems of traditional ink control methods on domestic offset printers, developing modern ink automatic control system has become more and more urgent. As an important subsystem, the human computer interface (HCI) is a key function for the wholly automatic control. Once this goal is obtained, all the printing procedures especially the automatic control of ink volume should be finished with human computer interface in different areas. Considering the HCI design theory and structure characteristics of domestic printers comprehensively, the HCI prototype for automatic ink control system has been developed based on Visual Basic platform. As the individual ink key is instead of the integrated key, the division result of ink fountain can be displayed on the interface. Through the interface, the dynamic adjusting functions such as modifying ink volume, locking or unlocking each ink key and real-time displaying the adjusting results etc. can be completed. The simulation test has shown that the opening and practical feature of the prototype is satisfactory.

  11. Automatic power control system for 235 MWe atomic power reactor

    International Nuclear Information System (INIS)

    The paper highlights the essential features of the design, fabrication and testing of microprocessor based reactor power regulating system of Narora Atomic Power Plant (NAPP) and Kakrapar Atomic Power Plant (KAPP). The improved system design at KAPP employs the reactor power control based on neutron flux signal after correction. The control system responses have been presented and compared with the responses using a reactor functional simulator. A new fault tolerant reactor regulating system has been designed using a dual active and hot stand-by microprocessor system to improve operational reliability. (author). 1 ref., 8 figs

  12. Automatic quadrature control and measuring system. [using optical coupling circuitry

    Science.gov (United States)

    Hamlet, J. F. (Inventor)

    1974-01-01

    A quadrature component cancellation and measuring system comprising a detection system for detecting the quadrature component from a primary signal, including reference circuitry to define the phase of the quadrature component for detection is described. A Raysistor optical coupling control device connects an output from the detection system to a circuit driven by a signal based upon the primary signal. Combining circuitry connects the primary signal and the circuit controlled by the Raysistor device to subtract quadrature components. A known current through the optically sensitive element produces a signal defining the magnitude of the quadrature component.

  13. Supervision and automatic control of robotic systems in nuclear environments

    International Nuclear Information System (INIS)

    This paper describes new developments in controlling remote handling systems for nuclear applications. The main emphasis is to use robotic equipment and methods for reaching a high degree of system autonomy. A remote handling workstation concept is described, supporting various stages of mission planning and supervision by means of suited geometrical, procedural and functional models. The presented control system enables easy switching between semi-autonomous and manual task execution and sensor data integration. Some experimental results of a prototypic implementation are also described

  14. Programmable Logic Controllers for Systems of Automatic of the Level Crossing

    Directory of Open Access Journals (Sweden)

    Mieczyslaw Kornaszewski

    2006-01-01

    Full Text Available The railway crossings are vulnerable to incidence of high number of accidents often deadly. In order to face this problem, the modern systems of automatic of the level crossing have been introduced. These systems are based on Programmable Logic Controllers, which allow the designers to exploit self-control mechanisms, events acquiring, technical diagnostic which in turn enable remote control and acquisition of faults.

  15. Automatic learning of sequential decision strategies for dynamic security assessment and control

    OpenAIRE

    Wehenkel, Louis; Glavic, Mevludin; Geurts, Pierre; Ernst, Damien

    2006-01-01

    This paper proposes to formulate security control as a sequential decision making problem and presents new developments in automatic learning of sequential decision making strategies from simulations and/or information collected from real-life system measurements. The exploitation of these methods for the design of decision making strategies and control policies in the context of preventive and emergency mode dynamic security assessment and control is discussed and further opportunities for r...

  16. Automatic control of cycling effort using electric bicycles and mobile devices

    OpenAIRE

    Jose A. Afonso; Rodrigues, Filipe J.; Delfim Pedrosa; Joao L. Afonso

    2015-01-01

    This paper describes the development and evaluation of a novel effort control system for cycling, which contributes to promote the users’ mobility and physical health. This system provides automatic control of the motor assistance level of an electric bicycle in order to ensure that the cyclist’s effort remains inside the desired target zone, regardless of changes in other variables which normally affect the effort, such as the slope of the road. The system presented in this paper controls th...

  17. SIMULATION STUDIES ON AUTOMATIC GENERATION CONTROL IN DEREGULATED ENVIRONMENT WITHOUT CONSIDERING GRC

    Directory of Open Access Journals (Sweden)

    A. Suresh Babu

    2012-03-01

    Full Text Available In this paper, analysis of automatic generation control (AGC using integral controller is carried out in the deregulated environment. The traditional AGC of two area system is modified and implemented inderegulated environment to account the effect of contracted and un-contracted power demands on system dynamics. The concept of DISCO participation matrix (DPM to simulate bilateral contracts is proposed. Gain setting of integral controller is optimized without considering Generation Rate Constraint (GRC using Integral Squared Error (ISE technique.

  18. daptive Filter Used as a Dynamic Compensator in Automatic Gauge Control of Strip Rolling Processes

    Directory of Open Access Journals (Sweden)

    N. ROMAN

    2010-12-01

    Full Text Available The paper deals with a control structure of the strip thickness in a rolling mill of quarto type (AGC – Automatic Gauge Control. It performs two functions: the compensation of errors induced by unideal dynamics of the tracking systems lead by AGC system and the control adaptation to the change of dynamic properties of the tracking systems. The compensation of dynamical errors is achieved through inverse models of the tracking system, implemented as adaptive filters.

  19. A software architecture for hard real-time execution of automatically synthesized plans or control laws

    Science.gov (United States)

    Schoppers, Marcel

    1994-01-01

    The design of a flexible, real-time software architecture for trajectory planning and automatic control of redundant manipulators is described. Emphasis is placed on a technique of designing control systems that are both flexible and robust yet have good real-time performance. The solution presented involves an artificial intelligence algorithm that dynamically reprograms the real-time control system while planning system behavior.

  20. Probabilistic Analysis of an Automatic Power Factor Controller with variation in Power Factor

    OpenAIRE

    P K Bhatia; ROOSEL JAIN; GULSHAN TANEJA,

    2012-01-01

    In the present study, the probabilistic analysis of an automatic power factor controller (APFC) system working in industry/factory is investigated. The power factor correction of electrical loads and energy losses due to poor power factor are the problems common to all industrial companies. Therefore, the study of APFC unit is of greatimportance. Initially, the system is operative with controlled power factor. Then it may transit to state with power factor not controlled. On the failure of th...

  1. Automatic combustion control of the ArcelorMittal Tubarao coke oven batteries

    Energy Technology Data Exchange (ETDEWEB)

    L. Barbosa de Oliveira Mello; C.-H. Sampaio Dandrea; G.-H. Marietto Goncalves; A. Estevao Torres; N.-L. Biccas

    2008-05-15

    The objective of the automatic combustion control is to guarantee the operational stability of the coke batteries based on the control of the coking time and consequently, minimize the reduction of useful life of the ovens. This control is guided by a mathematical model whose inputs are process variables and raw materials parameters and outputs are combustion parameters. Therefore, this paper will present the evolution of the performance of the burning process, providing a stability of the coking time.

  2. Automatic frequency controller for power amplifiers used in bio-implanted applications: issues and challenges.

    Science.gov (United States)

    Hannan, Mahammad A; Hussein, Hussein A; Mutashar, Saad; Samad, Salina A; Hussain, Aini

    2014-01-01

    With the development of communication technologies, the use of wireless systems in biomedical implanted devices has become very useful. Bio-implantable devices are electronic devices which are used for treatment and monitoring brain implants, pacemakers, cochlear implants, retinal implants and so on. The inductive coupling link is used to transmit power and data between the primary and secondary sides of the biomedical implanted system, in which efficient power amplifier is very much needed to ensure the best data transmission rates and low power losses. However, the efficiency of the implanted devices depends on the circuit design, controller, load variation, changes of radio frequency coil's mutual displacement and coupling coefficients. This paper provides a comprehensive survey on various power amplifier classes and their characteristics, efficiency and controller techniques that have been used in bio-implants. The automatic frequency controller used in biomedical implants such as gate drive switching control, closed loop power control, voltage controlled oscillator, capacitor control and microcontroller frequency control have been explained. Most of these techniques keep the resonance frequency stable in transcutaneous power transfer between the external coil and the coil implanted inside the body. Detailed information including carrier frequency, power efficiency, coils displacement, power consumption, supplied voltage and CMOS chip for the controllers techniques are investigated and summarized in the provided tables. From the rigorous review, it is observed that the existing automatic frequency controller technologies are more or less can capable of performing well in the implant devices; however, the systems are still not up to the mark. Accordingly, current challenges and problems of the typical automatic frequency controller techniques for power amplifiers are illustrated, with a brief suggestions and discussion section concerning the progress of

  3. Automatic Frequency Controller for Power Amplifiers Used in Bio-Implanted Applications: Issues and Challenges

    Directory of Open Access Journals (Sweden)

    Mahammad A. Hannan

    2014-12-01

    Full Text Available With the development of communication technologies, the use of wireless systems in biomedical implanted devices has become very useful. Bio-implantable devices are electronic devices which are used for treatment and monitoring brain implants, pacemakers, cochlear implants, retinal implants and so on. The inductive coupling link is used to transmit power and data between the primary and secondary sides of the biomedical implanted system, in which efficient power amplifier is very much needed to ensure the best data transmission rates and low power losses. However, the efficiency of the implanted devices depends on the circuit design, controller, load variation, changes of radio frequency coil’s mutual displacement and coupling coefficients. This paper provides a comprehensive survey on various power amplifier classes and their characteristics, efficiency and controller techniques that have been used in bio-implants. The automatic frequency controller used in biomedical implants such as gate drive switching control, closed loop power control, voltage controlled oscillator, capacitor control and microcontroller frequency control have been explained. Most of these techniques keep the resonance frequency stable in transcutaneous power transfer between the external coil and the coil implanted inside the body. Detailed information including carrier frequency, power efficiency, coils displacement, power consumption, supplied voltage and CMOS chip for the controllers techniques are investigated and summarized in the provided tables. From the rigorous review, it is observed that the existing automatic frequency controller technologies are more or less can capable of performing well in the implant devices; however, the systems are still not up to the mark. Accordingly, current challenges and problems of the typical automatic frequency controller techniques for power amplifiers are illustrated, with a brief suggestions and discussion section concerning

  4. Situated cognitive engineering: the requirements and design of automatically directed scenario-based training

    NARCIS (Netherlands)

    Peeters, M.M.M.; van den Bosch, K.; Meyer, J-J.Ch.; Neerincx, M.A.

    2012-01-01

    Serious games enable trainees to practice independently of school, staff, and fellow students. This is important as amount of practice directly relates to training efficacy. It is also known that personalized guidance elevates the benefits of training. How to achieve automated guidance, for example to

  5. Radioisotope gage for automatic control of cotton wool package

    International Nuclear Information System (INIS)

    A summary is given of research work and in-service tests carried out on radiometric gages for on-line control in bandage industry. A special type of thickness gage based on beta absorption measurements restricts the weight fluctuations of ready cotton wool packages to less than +- 2 per cent. Economic effectiveness of the gage is evaluated

  6. A Formal Specification for a Real-Time Train Controller

    OpenAIRE

    Kramer, Simon

    2001-01-01

    We give a formal specification for a real-time controller for trains that operate on the Italian railway network. The controller will control train movements and is part of a larger system destined to guarantee safety with respect to dangers originating from train traffic in the railway network. Based on an informal specification document from the Italian railway company, we construct a simple state-based model and formalise it in terms of the property-based specification language TRIO. The o...

  7. Adaptive Automatic Gauge Control of a Cold Strip Rolling Process

    Directory of Open Access Journals (Sweden)

    ROMAN, N.

    2010-02-01

    Full Text Available The paper tackles with thickness control structure of the cold rolled strips. This structure is based on the rolls position control of a reversible quarto rolling mill. The main feature of the system proposed in the paper consists in the compensation of the errors introduced by the deficient dynamics of the hydraulic servo-system used for the rolls positioning, by means of a dynamic compensator that approximates the inverse system of the servo-system. Because the servo-system is considered variant over time, an on-line identification of the servo-system and parameter adapting of the compensator are achieved. The results obtained by numerical simulation are presented together with the data taken from real process. These results illustrate the efficiency of the proposed solutions.

  8. Discriminative training of self-structuring hidden control neural models

    DEFF Research Database (Denmark)

    Sørensen, Helge Bjarup Dissing; Hartmann, Uwe; Hunnerup, Preben

    1995-01-01

    This paper presents a new training algorithm for self-structuring hidden control neural (SHC) models. The SHC models were trained non-discriminatively for speech recognition applications. Better recognition performance can generally be achieved, if discriminative training is applied instead. Thus...

  9. Self-paced training for quality control inspectors

    International Nuclear Information System (INIS)

    The authors discuss the need for quality control (QC) training in the nuclear industry and propose requirements for QC training. This paper presents an overview of a self-paced training program for QC, including the characteristics and structure of such a program

  10. Specialized microprocessor modules for the synchrotron automatic control system

    International Nuclear Information System (INIS)

    At present a modernization of the Yerevan synchrotron control system is being performed with the aim to create multilevel architecture of computing means with the use of micro and personal computers. To operate at the lower level, there is elaborated a set of specialized modules based upon INTEL 8080 microprocessors that permit to solve the following problems: (1) continuous measurement, tolerable check of parameters and formation of actions that control the accelerator subsystems; (2) buffering, preliminary processing, information conversion and its transfer to a higher-level computer; (3) feedback local control. The connection of the modules with the computer is realized via the RS 232 standard interface of a 'Vector' design. The main cause for elaboration of specialized modules and rejection of using standard nuclear electronic equipment is the intention of apparatus minimization with sufficient versatility of its functional possibilities. In the present report the authors consider peculiarities of the construction of the microprocessor modules elaborated and also give specifications and functional diagrams

  11. Postural Control and Automaticity in Dyslexic Children: The Relationship between Visual Information and Body Sway

    Science.gov (United States)

    Barela, Jose A.; Dias, Josenaldo L.; Godoi, Daniela; Viana, Andre R.; de Freitas, Paulo B.

    2011-01-01

    Difficulty with literacy acquisition is only one of the symptoms of developmental dyslexia. Dyslexic children also show poor motor coordination and postural control. Those problems could be associated with automaticity, i.e., difficulty in performing a task without dispending a fair amount of conscious efforts. If this is the case, dyslexic…

  12. Automatic washing of hooves can help control digital dermatitis in dairy cows

    DEFF Research Database (Denmark)

    Thomsen, Peter Thorup; Kjær Ersbøll, Annette; Sørensen, Jan Tind

    2012-01-01

    6 commercial dairy herds in 2 experiments (1 and 2). In the experimental herd, automatic hoof washing resulted in cleaner hooves. In experiments 1 and 2, cows were washed after each milking on the left side only, leaving the right side unwashed as a within-cow control. In experiment 1, hooves were...

  13. Working out of video lessons to improve the quality of automatic control theory

    OpenAIRE

    Усик, Виктория Валерьевна; Пономарева, Анна Викторовна; Костюк, Александр Николаевич; Крапивницкая, Виктория Евгеньевна; Максимов, Владислав Александрович

    2010-01-01

    In article modern approaches to distance learning are stated. The characteristic, structural components and problems of performance of practical problems are considered in distance learning. The example of creation of video tutorial is led to a laboratory course «The automatic control theory» in program Adobe Captivate.

  14. Study of structural condition of WWR-K reactor automatic control rod material

    International Nuclear Information System (INIS)

    In this paper the results of structural investigation at WWR-K thermal research reactor automatic control (AC) rod materials of SAV-1 aluminium alloy and Kh18N10T austenitic steel. The structural investigation was performed with help of scanning and transmission electronic microscopy methods. (author)

  15. Matching Automatic Gain Control Across Devices in Bimodal Cochlear Implant Users

    NARCIS (Netherlands)

    Veugen, L.C.E.; Chalupper, J.; Snik, A.F.M; Opstal, A.J. van; Mens, L.H.M

    2016-01-01

    OBJECTIVES: The purpose of this study was to improve bimodal benefit in listeners using a cochlear implant (CI) and a hearing aid (HA) in contralateral ears, by matching the time constants and the number of compression channels of the automatic gain control (AGC) of the HA to the CI. Equivalent AGC

  16. On the question of the necessity of implementation of automatic control systems in timber industry

    Science.gov (United States)

    Khasanov, E. R.; Zelenkov, P. V.; Petrosyan, M. O.; Murygin, A. V.; Laptenor, V. D.

    2016-04-01

    The paper considers the necessity of implementation of automatic control systems on the level of forest farms management and timber industry. Main areas of activity, which currently subjected to automation, are revealed. Objectives, which solved by implementation of APCS, are identified.

  17. Using Automatic Code Generation in the Attitude Control Flight Software Engineering Process

    Science.gov (United States)

    McComas, David; O'Donnell, James R., Jr.; Andrews, Stephen F.

    1999-01-01

    This paper presents an overview of the attitude control subsystem flight software development process, identifies how the process has changed due to automatic code generation, analyzes each software development phase in detail, and concludes with a summary of our lessons learned.

  18. Radiological Control Technician: Phase 1, Site academic training lesson plans

    International Nuclear Information System (INIS)

    This volume provides lesson plans for training radiological control technicians. Covered here is basic radiological documentation, counting errors, dosimetry, environmental monitoring, and radiation instruments

  19. Revitalisation thermal column drive train control system

    International Nuclear Information System (INIS)

    Revitalisation thermal columns propulsion train control system is very urgent to be implemented because of the test results and observation, control system performance is not normal, there are several components that must be renewed. Components includes MCB, magnetic contactors, push buttons, indicator lights and wiring. Drive motor is used to power 1.5 kW 3 phase, 380 volts and 50 Hz, nominal current (In = 3.75 A). Thermal column is one of the irradiation facility at the Kartini reactor has a beam-shaped room of measuring 1.2 X 1.2 X 1.6 m contains graphite blocks 10.2 X 10.2 X 127 cm(1) and is tangentially connected to the Kartini reactor core. Graphite blocks mounted reflector extends from the outer side to the inner surface of the door closer. Door closer contains barite concrete as radiation shielding and can be moved forward and backward to close and to open using a rotating motor to spin the wheel transmission system for running on rails. (author)

  20. Semiconductor Light-Controlled Instrument Transducer with Direct PWM Output for Automatic Control Systems

    Directory of Open Access Journals (Sweden)

    F. J. De la Hidalga-W

    2013-01-01

    Full Text Available This work shows that the direct PWM output electric signal, with a duty cycle controlled by light intensity, can beobtained using a circuit containing a saw-tooth voltage generator connected in series with a dc voltage source and ametal (semitransparent gate oxide semiconductor capacitor (MOS-C.The internal PWM signal conversion occurs by the use of non-equilibrium physical processes in the semiconductorsubstrate of the MOS-C. The 10-20 V amplitude limited square PWM output signal is obtained by the amplification ofthe sensor signal with a standard 60 dB transimpedance amplifier. The amplified output signal presents positive andnegative PWM waveforms that can be easily separated using diodes. The duty of the positive part is proportional tothe light intensity, whereas the negative part is inversely proportional to the intensity. The frequency operating rangeof this proposed instrument varies from 1 Hz to a few kilohertz. The duty cycle of the PWM output signal varies from2% to 98% when the incident light intensity varies in the microwatts range. These new transducers or sensors couldbe useful for automatic control, robotic applications, dimmer systems, feedback electronic systems, and non-contactoptical position sensing for nulling and centering measurements.

  1. Automatic start control for a three-phase electric motor using infrared sensors

    Science.gov (United States)

    Echenique Lima, Mario; Ramírez Arenas, Francisco; Rodríguez Pedroza, Griselda

    2006-02-01

    We introduce equipment for the automatic activation of a three-phase electric motor (1Hp, 3A, 240V AC) using 2 infrared sensors monitored by a Microchip microcontroller PIC16F62x@4Mhz for the control of a filling system. This project was carried out to Fabrica de Chocolates y Dulces Costanzo, where the automatization of cacao grain supply was required for a machine in charge of cleaning the cacao from its rind. This process demanded the monitoring of the filling level to avoid the spill of toasted cacao.

  2. Design of automatic control and measurement software for radioactive aerosol continuity monitor

    International Nuclear Information System (INIS)

    The radioactive aerosol continuity measurement is very important for the development of nuclear industry, and it is the major method to measure and find out the leakage of radioactive material. Radioactive aerosol continuity monitor is the advanced method for the radioactive aerosol continuity measurement. With the development of nuclear industry and nuclear power station, it is necessary to design and automatic continuity measurement device. Because of this reason, the authors developed the first unit of radioactive aerosol continuity monitor and adopted the ministry appraisal. The design idea and method of automatic control and measurement for radioactive aerosol continuity monitor are discussed

  3. Remote automatic control scheme for plasma arc cutting of contaminated waste

    International Nuclear Information System (INIS)

    The Robotics Development Group at the Savannah River Technology Center has developed and implemented a scheme to perform automatic cutting of metallic contaminated waste. The scheme employs a plasma arc cutter in conjunction with a laser ranging sensor attached to a robotic manipulator called the Telerobot. A software algorithm using proportional control is then used to perturb the robot's trajectory in such a way as to regulate the plasma arc standoff and the robot's speed in order to achieve automatic plasma arc cuts. The scheme has been successfully tested on simulated waste materials and the results have been very favorable. This report details the development and testing of the scheme

  4. Automatic Voltage Control (AVC) of Danish Transmission System - Concept design

    DEFF Research Database (Denmark)

    Qin, Nan; Abildgaard, Hans; Lund, P.;

    2014-01-01

    the buses are monitored where the voltage magnitudes are maintained continually. The loss minimization including switching cost is the objectives of the AVC system. The reactive power reserves as constraints are taken into account to limit the regulation capabilities of generators. The Day ahead and short......-term forecast is to be implemented to reduce the working load of the real time system, as well as to minimize the numbers of switching times of the discrete components. The fallback controllers are to be installed in selected substations to enhance the system reliability and the robustness in case...

  5. Automatic safety control for a reactor primary circuit

    International Nuclear Information System (INIS)

    It is to be provided for the circulation in a closed-loop primary coolant circuit of a nuclear reactor driven by a recirculation pump to stop instantaneously without any action of additional control systems on occurence of a large pressure drop. The recirculation pumps operating without cavitation at the operating point is designed according to the invention in that way that at large pressure drops in the coolant circuit it wille pass over to full cavitation, thus reducing the flow rate to a flow per cent of the operating flow rate. This is achieved by influencing a) the distribution of the required total pressure head of the recirculation pump over the total range of flow rates, or b) the pressure head excisting on the suction side of the recirculation pump. Both means may also be applied together. (RW) 891 RW/RW 892 MKO

  6. Unattended vehicle detection for automatic traffic light control

    Science.gov (United States)

    Abdel Hady, Aya Salama; Moustafa, Mohamed

    2013-12-01

    Machine vision based traffic light control depends mainly on measuring traffic statistics at cross roads. Most of the previous studies have not taken unattended vehicles into consideration when calculating either the traffic density or the traffic flow. In this paper, we propose incorporating unattended vehicles into a new metric for measuring the traffic congestion. In addition to the vehicle motion analysis, opening the driver's side door is an important indicator that this vehicle is going to be unattended. Therefore, we focus in this paper on presenting how to detect this event for stationary vehicles from a live camera or a video feed. Through a set of experiments, we have found out that a Scale Invariant Feature Transform (SIFT) feature-descriptor with a Support Vector Machines (SVM) classifier was able to successfully classify open-door vehicles from closed-door ones in 96.7% of our test dataset.

  7. AUTOMATIC TRAINING DATA SYNTHESIS FOR HANDWRITING RECOGNITION USING THE STRUCTURAL CROSSING-OVER TECHNIQUE

    Directory of Open Access Journals (Sweden)

    Sirisak Visessenee

    2014-07-01

    Full Text Available The paper presents a novel technique called “Struct ural Crossing-Over” to synthesize qualified data fo r training machine learning-based handwriting recogni tion. The proposed technique can provide a greater variety of patterns of training data than the exist ing approaches such as elastic distortion and tange nt- based affine transformation. A couple of training c haracters are chosen, then they are analyzed by the ir similar and different structures, and finally are c rossed over to generate the new characters. The experiments are set to compare the performances of tangent-based affine transformation and the propose d approach in terms of the variety of generated chara cters and percent of recognition errors. The stand ard MNIST corpus including 60,000 training characters a nd 10,000 test characters is employed in the experiments. The proposed technique uses 1,000 char acters to synthesize 60,000 characters, and then us es these data to train and test the benchmark handwrit ing recognition system that exploits Histogram of Gradient: HOG as features and Support Vector Machin e: SVM as recognizer. The experimental result yields 8.06% of errors. It significantly outperform s the tangent-based affine transformation and the original MNIST training data, which are 11.74% and 16.55%, respectively.

  8. An automatic regulating control system for a graphite moderated reactor using digital techniques

    International Nuclear Information System (INIS)

    The work propose an automatic regulating control system for a graphite moderated reactor using digital techniques. The system uses a microcomputer to monitor the power and the period, to run the control algorithm, and to generate electronic signals to excite the motor, which moves vertically the control rod banks. A nuclear reactor simulator was developed to test the control system. The simulator consists of a software based on the point kinetic equations and implanted in an analogical computer. The results show that this control system has a good performance and versatility. In addition, the simulator is capable of reproducing with accuracy the behavior of a nuclear reactor. (author)

  9. Automatic control system for measuring currents produced by ionization chambers

    International Nuclear Information System (INIS)

    Ionization Chambers in current mode operation are usually used in Nuclear Metrology. Activity measurements are quickly performed by Ionization Chambers, with very good precision. For this purpose measurements of very low ionization currents, carried out by high quality instrumentation, are required. Usually, electrometers perform the current integration method under command of signals from an automation system, in order to reduce the measurement uncertainties. Among the measurement systems at the Laboratorio de Metrologia Nuclear (LMN) of IPEN, there are two ionization chamber systems. In the present work, an automation system developed for current integration measurements is described. This automation system is composed by software (graphic interface and control) and an electronic module connected to a microcomputer, by means of a commercial data acquisition card. Several test measurements were performed in order to determine the intrinsic uncertainty, linearity and stability of the system. Using calibrated radioactive solutions, the IG12/A20 chamber calibration factors for 18F and 153Sm were obtained, making possible to determine activities of these radionuclides. (author)

  10. Automatic control system of the radiometric system for inspection of large-scale vehicles and cargoes

    International Nuclear Information System (INIS)

    The automatic control system (ACS) is intended to control the equipment of the radiometric inspection system in the normal operating modes as well as during the preventive maintenance, maintenance/repair and adjustment works; for acquisition of the data on the status of the equipment, reliable protection of the personnel and equipment, acquisition, storage and processing of the results of operation and to ensure service maintenance.

  11. Automatic control with fuzzy logic of home-made beer production in maceration and cooking stages

    OpenAIRE

    Mariano Luján Corro; Víctor Vásquez Villalobos

    2010-01-01

    The process of home-made beer production in the malt maceration and cooking stages was controlled automatically with fuzzy logic, across different performers considering the time and temperature of the process, using 2009LabVIEW. The equipment was mainly composed of three 20 L capacity stainless steel containers (water supply, maceration and cooking), an additional hops container, a data acquisition card (PIC 16F877a micro controller), three LM35 temperature sensors and 11 on/off type perform...

  12. Automatic beam position control at Los Alamos Spallation Radiation Effects Facility (LASREF)

    International Nuclear Information System (INIS)

    Historically the Los Alamos Spallation Radiation Effects Facility (LASREF) has used manual methods to control the position of the 800 kW, 800 MeV proton beam on targets. New experiments, however, require more stringent position control more frequently than can be done manually for long periods of time. Data from an existing harp is used to automatically adjust steering magnets to maintain beam position to required tolerances

  13. Neural Network Control-Based Drive Design of Servomotor and Its Application to Automatic Guided Vehicle

    OpenAIRE

    Ming-Shyan Wang; Seng-Chi Chen; Po-Hsiang Chuang; Shih-Yu Wu; Fu-Shung Hsu

    2015-01-01

    An automatic guided vehicle (AGV) is extensively used for productions in a flexible manufacture system with high efficiency and high flexibility. A servomotor-based AGV is designed and implemented in this paper. In order to steer the AGV to go along a predefined path with corner or arc, the conventional proportional-integral-derivative (PID) control is used in the system. However, it is difficult to tune PID gains at various conditions. As a result, the neural network (NN) control is consider...

  14. Further Flight Tests on the Effectiveness of Handley Page Automatic Control Slots

    Science.gov (United States)

    Pleines, Wilhelm

    1932-01-01

    Investigation of damping in roll within range of maximum lift with the Albatross L 75, with and without Handley Page automatic control slots, revealed the following: Without control slots, any attempt to go beyond a certain angle of attack near c(sub a max) in glide and climb, is followed by sudden sideslip. The conduct of the airplane throughout the motions in roll, moreover, confirmed that all attempts to higher angles of attack are accompanied by sudden loss of damping in roll.

  15. Possibilities for automatic control of hydro-mechanical transmission and birotating electric machine

    OpenAIRE

    Mikhailov, V.V.; A. G. Snitkov

    2014-01-01

    The paper presents mathematical models and results of virtual investigations pertaining to the selected motion parameters of a mobile machine equipped with hydro mechanical and modernized transmissions. The machine has been tested in similar technological cycles and it has been equipped with a universal automatic control system. Changes in structure and type of power transmission have been obtained with the help of a control algorithm including an extra reversible electric machine which is sw...

  16. Modeling and simulation for train control system using cellular automata

    Institute of Scientific and Technical Information of China (English)

    LI; KePing; GAO; ZiYou; YANG; LiXing

    2007-01-01

    Train control system plays a key role in railway traffic. Its function is to manage and control the train movement on railway networks. In our previous works, based on the cellular automata (CA) model, we proposed several models and algorithms for simulating the train movement under different control system conditions. However, these models are only suitable for some simple traffic conditions. Some basic factors, which are important for train movement, are not considered. In this paper, we extend these models and algorithms and give a unified formula. Using the proposed method, we analyze and discuss the space-time diagram of railway traffic flow and the trajectories of the train movement. The numerical simulation and analytical results demonstrate that the unified CA model is an effective tool for simulating the train control system.

  17. Energy-optimal control model for train movements

    Institute of Scientific and Technical Information of China (English)

    Li Ke-Ping; Gao Zi-You; Mao Bao-Hua

    2007-01-01

    In this paper, we propose a new cellular automaton (CA) model for train movement simulations under mixed traffic conditions. A kind of control strategy is employed for trains to reduce energy consumption. In the proposed CA model, the driver controls the train movements by using some updated rules. In order to obtain a good insight into the evolution behaviours of the rail traffic flow, we investigate the space-time diagram of the rail traffic flow and the trajectories of the train movements. The numerical simulation results demonstrate that the proposed CA model can well describe the dynamic behaviours of the train movements. Some complex phenomena of train movements can be reproduced, such as the train delay propagations, etc.

  18. 12 CFR 1731.5 - Internal controls, procedures, and training.

    Science.gov (United States)

    2010-01-01

    ... 12 Banks and Banking 7 2010-01-01 2010-01-01 false Internal controls, procedures, and training. 1731.5 Section 1731.5 Banks and Banking OFFICE OF FEDERAL HOUSING ENTERPRISE OVERSIGHT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT SAFETY AND SOUNDNESS MORTGAGE FRAUD REPORTING § 1731.5 Internal controls, procedures, and training. An Enterprise...

  19. 78 FR 11236 - Positive Train Control Public Forum

    Science.gov (United States)

    2013-02-15

    ... SAFETY BOARD Positive Train Control Public Forum On Wednesday, February 27, 2013, the National Transportation Safety Board (NTSB) will convene a Forum titled, ``Positive Train Control: Is it on Track?'' The Forum will begin at 9:00 a.m. is open to all and the attendance is free (no registration required)....

  20. Game-based training environment for nuclear plant control room

    International Nuclear Information System (INIS)

    Nuclear power plant's safety is very important problem. In this very conscientious environment if operator has a little mistake, they may threaten with many people influence their safety. Therefore, operating training of control room is very important. However, the operator training is in limited space and time. Each operator must go to simulative control room do some training. If we can let each trainee having more time to do training and does not go to simulative control room. It may have some advantages for trainee. Moreover, in the traditional training ways, each operator may through the video, teaching manual or through the experienced instructor to learn the knowledge. This training way may let operator feel bored and stressful. So, in this paper aims, we hope utilizing virtual reality technology developing a game-based virtual training environment of control room. Finally, we will use presence questionnaire evaluating realism and feasibility of our virtual training environment. Expecting this initial concept of game-based virtual training environment can attract trainees having more learning motivation to do training in off-hour. (author)

  1. Optimal shifting control strategy in inertia phase of an automatic transmission for automotive applications

    Science.gov (United States)

    Meng, Fei; Tao, Gang; Zhang, Tao; Hu, Yihuai; Geng, Peng

    2015-08-01

    Shifting quality is a crucial factor in all parts of the automobile industry. To ensure an optimal gear shifting strategy with best fuel economy for a stepped automatic transmission, the controller should be designed to meet the challenge of lacking of a feedback sensor to measure the relevant variables. This paper focuses on a new kind of automatic transmission using proportional solenoid valve to control the clutch pressure, a speed difference of the clutch based control strategy is designed for the shift control during the inertia phase. First, the mechanical system is shown and the system dynamic model is built. Second, the control strategy is designed based on the characterization analysis of models which are derived from dynamics of the drive line and electro-hydraulic actuator. Then, the controller uses conventional Proportional-Integral-Derivative control theory, and a robust two-degree-of-freedom controller is also carried out to determine the optimal control parameters to further improve the system performance. Finally, the designed control strategy with different controller is implemented on a simulation model. The compared results show that the speed difference of clutch can track the desired trajectory well and improve the shift quality effectively.

  2. Reactivity response analyses for the design of automatic power level control system of upgraded JRR-3

    International Nuclear Information System (INIS)

    This reports the analytical results of transient responses to inserted reactivities for the design of the automatic power level control system of upgraded JRR-3. The parameters of reactor kinetics, prompt neutron lifetime and effective delayed neutron fraction, have been calculated by neutron diffusion theory and perturbation theory using the SRAC code system. Burn-up processes, reactor temperatures and configurations of control rods have been taken into account in the calculation. The transient responses of the automatic control system to a step reactivity change of +- 7.3 * 10-4 Δk/k and a ramp reactivity change of +- 3.0 * 10-4 Δk/k/sec have been obtained by analogue computer. As the result, when a regulator rod is used for the automatic power control, its driving velocity has been designed to be 30 cm/min. It has been confirmed that this designed control system can quickly respond to the reactivity perturbations and maintain a desired power level. (author)

  3. Qualified operator training in the simulated control room environment

    International Nuclear Information System (INIS)

    Full text: Mainly designed for the training of the Cernavoda NPP Unit 2 operators, the virtual simulated environment allows the training of the already qualified operators for Cernavoda NPP Unit 1, adding to the already trained knowledge, the differences which has occurred in the Unit 2 design. Using state-of-the-art computers and displays and qualified software, the virtual simulated panels could offer a viable alternative to classic hardware-based training. This approach allows quick training of the new procedures required by the new configuration of the re-designed operator panels in the main control room of Cernavoda NPP Unit 2. (authors)

  4. Monitor automatic gauge control strategy with a Smith predictor for steel strip rolling

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The simplified transfer function diagram block for a monitor automatic gauge control (Mon-AGC) system of strip steel rolling process was investigated.The new notion of strip sample length was given.In this way,the delay time varying with the rolling speed was evaded.After a Smith predictor was used to monitor the AGC system,the control laws were deduced for both proportional and integral regulators.The control strategies showed that by choosing the controller parameter P=∞ for both control algorithms each regulator could compensate the whole strip gage error in the first control step.The result shows that the integral algorithm is more controllable for the system regulating process and has a better steady-state precision than the proportional regulator.Compared with the traditional control strategy,the new control laws have a faster response speed and a higher steady-state precision.

  5. Design of a modern automatic control system for the activated sludge process in wastewater treatment

    Institute of Scientific and Technical Information of China (English)

    Alexandros D. Kotzapetros; Panayotis A. Paraskevas; Athanasios S. Stasinakis

    2015-01-01

    The Activated Sludge Process (ASP) exhibits highly nonlinear properties. The design of an automatic control system that is robust against disturbance of inlet wastewater flow rate and has short process settling times is a chal enging matter. The proposed control method is an I-P modified controller automatic control system with state variable feedback and control canonical form simulation diagram for the process. A more stable response is achieved with this type of modern control. Settling times of 0.48 days are achieved for the concentration of microorganisms, (reference value step increase of 50 mg·L−1) and 0.01 days for the concentration of oxygen (reference value step increase of 0.1 mg·L−1). Fluctuations of concentrations of oxygen and microorganisms after an inlet disturbance of 5 × 103m3·d−1 are smal . Changes in the reference values of oxygen and microorganisms (increases by 10%, 20%and 30%) show satisfactory response of the system in al cases. Changes in the value of inlet wastewater flow rate disturbance (increases by 10%, 25%, 50%and 100%) are stabilized by the control system in short time. Maximum percent overshoot is also taken in consideration in all cases and the largest value is 25%which is acceptable. The proposed method with I-P controller is better for disturbance rejection and process settling times compared to the same method using PI control er. This method can substitute optimal control systems in ASP.

  6. Research on System Simulation Platform of Moving-Block Automatic Train Protection%移动闭塞列车自动防护系统仿真平台研究

    Institute of Scientific and Technical Information of China (English)

    孙永生; 张友鹏; 赵宇坤

    2012-01-01

    Optimization of train protection system was studied. Automatic train protection system should ensure train operation safety, optimize and control the speeds and time intervals of trains, and increase the line capacity in Moving-block train control system. Therefore, establishment of simulation platform of Moving-block automatic train protection system was proposed to track the Mpving-block train operation, forecast running strategy in the next stage, and control the train to track the intervals safely and in real-time. Through the establishment of models of minimum train safe track interval, the simulation platform can monitor the train running. After the analysis of train operation simulation under different conditions, the results indicate that the protection system of the simulation platform can guarantee the safe of train operation.%研究列车防护系统优化问题,列车自动防护系统应在移动闭塞列控系统中保证行车安全,对列车运行的速度和时间间隔应进行优化控制,提高线路运力.为此提出建立移动闭塞列车自动防护系统仿真平台,实现对移动闭塞列车的运行进行追踪,预测列车下一阶段的运行策略,并对列车的安全追踪间隔进行实时控制.通过建立列车最小安全追踪间隔模型,使仿真平台实现了列车运行安全监控功能.经过对不同条件下列车的运行进行仿真分析,结果表明,仿真平台的防护系统能够保证列车的运行安全.

  7. Exercise training improves fasting glucose control

    Directory of Open Access Journals (Sweden)

    Lewis N

    2012-11-01

    Full Text Available Lynda Norton,1 Kevin Norton,2 Nicole Lewis21School of Medicine, Flinders University, Adelaide, Australia; 2School of Health Science, University of South Australia, Adelaide, AustraliaPurpose: Numerous studies have measured changes in fasting blood glucose (FBG levels in response to physical activity (PA interventions. While studies involving clinical populations such as type 2 diabetics typically report significant reductions, most others report no change in FBG. This study investigated changes in FBG in apparently healthy adults following a PA intervention.Methods: We measured fingertip samples for FBG pre and post a 40-day PA program in 575 insufficiently active adults. The PA goal was at least 30 minutes of moderate exercise daily, and there was 73% compliance.Results: A PA questionnaire showed the average level of activity was 69 ± 46 min/wk preintervention, and this increased to 635 ± 458 min/wk postintervention. When the change in FBG was regressed against baseline FBG levels, there was a significant negative relationship (y = 2.623 – 0.471 × x; r = 0.472; P < 0.0001. The regression line showed, on average, subjects with low pre-study glucose levels had increased FBG while those with high levels had reductions in FBG.Conclusion: It appears that the body's response to PA training is to upregulate glucose control, which is reflected in tighter FBG levels around a physiological set point (5.6 mmol/L, in the present study. Regulation of blood glucose is a complex neuroendocrine process with numerous organs involved, but it was not possible in the present study to determine which of these regulatory steps are involved in exercise-induced changes of FBG.Keywords: physical activity, glucagon, insulin sensitivity

  8. Results of automatic system implementation for the friction control rods execution in Cofrentes nuclear power plant

    International Nuclear Information System (INIS)

    The purpose of this presentation is to show the obtained results in Cofrentes nuclear power plant (Spain) of control rods Pcc/24 friction test procedure. In order to perform this, a control rod friction test system has been developed. Principally, this system consists on software and data acquisition hardware that obtains and analyzes the control rod pressure variation on which the test is being made. The Pcc/24 procedure objective is to detect an excessive friction in the control rod movement that could cause a control rod drive movement slower than usual. This test is necessary every time that an anomalous alteration is produced in the reactor core that could affect to a fuel rod, and it is executed before the time measure of control rods rapid scram test of the affected rods. This test has to be carried out to all the reactor control rods and takes valuable time during plant refuelling. So, by means of an automatic system to perform the test, we obtain an important time saving during refuelling. On the other hand, the on-line monitoring of the control rod insertion and changes in differential pressure, permits a control rod operation fast and safe validation. Moreover, an automatic individual report of every rod is generated by the system and a final global result report of the entire test developed in refuelling is generated. The mentioned reports can be attached directly to the procedure documents obtaining an office data processing important saving time. (Author)

  9. Results of automatic system implementation for the friction control rods execution in Cofrentes nuclear power plant

    Energy Technology Data Exchange (ETDEWEB)

    Palomo, M., E-mail: mpalomo@iqn.upv.es [Universidad Politecnica de Valencia (UPV) (Spain); Urrea, M., E-mail: matias.urrea@iberdrola.es [Iberdrola Generacion S.A. Valencia (Spain). C.N. Cofrentes; Curiel, M., E-mail: m.curiel@lainsa.com [Logistica y Acondicionamientos Industriales (LAINSA), Valencia (Spain); Arnaldos, A., E-mail: a.arnaldos@titaniast.com [TITANIA Servicios Teconologicos, Valencia (Spain)

    2011-07-01

    The purpose of this presentation is to show the obtained results in Cofrentes Nuclear Power Plant (Spain) of Control Rods PCC/24 Friction Test Procedure. In order to perform this, a Control Rod Friction Test System has been developed. Principally, this system consists on software and data acquisition hardware that obtains and analyzes the control rod pressure variation on which the test is being made. The PCC/24 Procedure objective is to detect an excessive friction in the control rod movement that could cause a CRD (Control Rod Drive) movement slower than usual. This test is necessary every time that an anomalous alteration is produced in the reactor core that could affect to a fuel rod, and it is executed before the time measure of control rods rapid scram test of the affected rods. This test has to be carried out to all the reactor control rods and takes valuable time during plant refuelling. So, by means of an automatic system to perform the test, we obtain an important time saving during refuelling. On the other hand, the on-line monitoring of the control rod insertion and changes in differential pressure, permits a control rod operation fast and safe validation. Moreover, an automatic individual report of every rod is generated by the system and a final global result report of the entire test developed in refuelling is generated. The mentioned reports can be attached directly to the procedure documents obtaining an office data processing important saving time.(author)

  10. Results of automatic system implementation for the friction control rods execution in Cofrentes nuclear power plant

    Energy Technology Data Exchange (ETDEWEB)

    Curiel, M. [Logistica y Acondicionamientos Industriales SAU, Sorolla Center, local 10, Av. de las Cortes Valencianas, 46015 Valencia (Spain); Palomo, M. J. [ISIRYM, Universidad Politecnica de Valencia, Camino de Vera s/n, Valencia (Spain); Urrea, M. [Iberdrola Generacion S. A., Central Nuclear Cofrentes, Carretera Almansa Requena s/n, 04662 Cofrentes, Valencia (Spain); Arnaldos, A., E-mail: m.curiel@lainsa.co [TITANIA Servicios Tecnologicos SL, Sorolla Center, local 10, Av. de las Cortes Valencianas No. 58, 46015 Valencia (Spain)

    2010-10-15

    The purpose of this presentation is to show the obtained results in Cofrentes nuclear power plant (Spain) of control rods Pcc/24 friction test procedure. In order to perform this, a control rod friction test system has been developed. Principally, this system consists on software and data acquisition hardware that obtains and analyzes the control rod pressure variation on which the test is being made. The Pcc/24 procedure objective is to detect an excessive friction in the control rod movement that could cause a control rod drive movement slower than usual. This test is necessary every time that an anomalous alteration is produced in the reactor core that could affect to a fuel rod, and it is executed before the time measure of control rods rapid scram test of the affected rods. This test has to be carried out to all the reactor control rods and takes valuable time during plant refuelling. So, by means of an automatic system to perform the test, we obtain an important time saving during refuelling. On the other hand, the on-line monitoring of the control rod insertion and changes in differential pressure, permits a control rod operation fast and safe validation. Moreover, an automatic individual report of every rod is generated by the system and a final global result report of the entire test developed in refuelling is generated. The mentioned reports can be attached directly to the procedure documents obtaining an office data processing important saving time. (Author)

  11. The systems of automatic weight control of vehicles in the road and rail transport in Poland

    Directory of Open Access Journals (Sweden)

    2011-09-01

    Full Text Available . Condition of roads in Poland, despite the on-going modernisation works is still unsatisfactory. One reason is the excessive wear caused by overloaded vehicles. This problem also applies to rail transport, although to a much lesser extent. One solution may be the system of automatic weight control of road and rail vehicles. The article describes the legal and organizational conditions of oversize vehicles inspection in Poland. Characterized current practices weighing road vehicles, based on measurements of static technology. The article includes the description of the existing applications of the automatic dynamic weighing technology, known as systems WIM (Weigh in Motion. Additionally, the weighing technology and construction of weighing stands in road and rail are characterized. The article ends with authors' conclusions indicating the direction and ways of improving the weighing control systems for vehicles.

  12. Prejudice and perception: the role of automatic and controlled processes in misperceiving a weapon.

    Science.gov (United States)

    Payne, B K

    2001-08-01

    Two experiments used a priming paradigm to investigate the influence of racial cues on the perceptual identification of weapons. In Experiment 1, participants identified guns faster when primed with Black faces compared with White faces. In Experiment 2, participants were required to respond quickly, causing the racial bias to shift from reaction time to accuracy. Participants misidentified tools as guns more often when primed with a Black face than with a White face. L. L. Jacoby's (1991) process dissociation procedure was applied to demonstrate that racial primes influenced automatic (A) processing, but not controlled (C) processing. The response deadline reduced the C estimate but not the A estimate. The motivation to control prejudice moderated the relationship between explicit prejudice and automatic bias. Implications are discussed on applied and theoretical levels. PMID:11519925

  13. Automatic control system for a 30 MeV electron linac

    International Nuclear Information System (INIS)

    Results of studying a mock-up of an automatic control system for a 30 MeV linear electron accelerator are discussed. The purpose of the system is as follows: automatic implementation of all the accelerator systems in the preset conditions; read-put of measuring and diagnostic data, its initial processing and transmission to a computer and local representation and recording devices; holding of the accelerator performances at preset levels by received data processing and transmitting to the accelerator controllable power supplies. A system flowsheet and a basic circuit of a unit for switching the channels which provide the setting of parameters at present levels are given. Setting of variable parameters at corresponding levels is done with an error of 0.2%

  14. Automatic Learning of Fine Operating Rules for Online Power System Security Control.

    Science.gov (United States)

    Sun, Hongbin; Zhao, Feng; Wang, Hao; Wang, Kang; Jiang, Weiyong; Guo, Qinglai; Zhang, Boming; Wehenkel, Louis

    2016-08-01

    Fine operating rules for security control and an automatic system for their online discovery were developed to adapt to the development of smart grids. The automatic system uses the real-time system state to determine critical flowgates, and then a continuation power flow-based security analysis is used to compute the initial transfer capability of critical flowgates. Next, the system applies the Monte Carlo simulations to expected short-term operating condition changes, feature selection, and a linear least squares fitting of the fine operating rules. The proposed system was validated both on an academic test system and on a provincial power system in China. The results indicated that the derived rules provide accuracy and good interpretability and are suitable for real-time power system security control. The use of high-performance computing systems enables these fine operating rules to be refreshed online every 15 min. PMID:25680217

  15. An automatically controlled system for waste transport in low level nuclear waste storage facilities

    International Nuclear Information System (INIS)

    Kobe Steel has developed and manufactured a fully automatic remote-controlled system for the storage of up to 42 000 waste drum packages discharged from nuclear reprocessing facilities. The system includes two forklifts and an elevator both of which are controlled via a remote control center. The forklifts can transport up to 4 ton waste packages. The elevator can transport a forklift carrying a maximum weight package. The system also includes a rescue vehicle that can be manually operated at a distance from a remote station using ITV cameras. (author)

  16. Automatic module system for control of an ion source 'Cryon-S'

    International Nuclear Information System (INIS)

    The automatic module system for control of an ionizer 'Cryon-S' using fiber optics links and PC/XT is described. Brief technical characteristics of basic and service optical systems used in the first run for acceleration of nuclei sulfur on the synchrophasotron of the Laboratory of High Energies (L.H.E.) from the electron beam ion source 'Cryon-S' are presented. 26 refs.; 5 figs

  17. Bayesian Updating in the EEG : Differentiation between Automatic and Controlled Processes of Human Economic Decision Making

    OpenAIRE

    Hügelschäfer, Sabine

    2011-01-01

    Research has shown that economic decision makers often do not behave according to the prescriptions of rationality, but instead show systematic deviations from rational behavior (e.g., Starmer, 2000). One approach to explain these deviations is taking a dual-process perspective (see Evans, 2008; Sanfey & Chang, 2008; Weber & Johnson, 2009) in which a distinction is made between deliberate, resource-consuming controlled processes and fast, effortless automatic processes. In many cases, deviati...

  18. Automatic quality control system of the installed straws into TRT wheels

    International Nuclear Information System (INIS)

    An automatic quality control system of the installed straws into TRT ATLAS is described. The system provides straw testing for straightness and electrical isolation of the straws during their installation. Testing of the quality of installation of each straw takes 9 s, and the test of one layer of the straws - about 2 hours. The application of this system provides an opportunity of correcting defects in due time, which can influence the detector operation in the future

  19. Automatic Generation of Predictive Dynamic Models Reveals Nuclear Phosphorylation as the Key Msn2 Control Mechanism

    OpenAIRE

    Sunnåker, Mikael; Zamora-Sillero, Elias; Dechant, Reinhard; Ludwig, Christina; Busetto, Alberto Giovanni; Wagner, Andreas; Stelling, Joerg

    2013-01-01

    Predictive dynamical models are critical for the analysis of complex biological systems. However, methods to systematically develop and discriminate among systems biology models are still lacking. Here, we describe a computational method that incorporates all hypothetical mechanisms about the architecture of a biological system into a single model, and automatically generates a set of simpler models compatible with observational data. As a proof-of-principle, we analyzed the dynamic control o...

  20. Feasibility Study of Correcting Circuit Scheme for Automatic Control System of Total Air in Boiler

    Directory of Open Access Journals (Sweden)

    V. Nazarov

    2014-09-01

    Full Text Available The paper contains results of investigations on dynamic characteristics automatic control system (ACS for total air consumption (TAC in a boiler with corrections for О2 and СО. From transition process point of view the ACS TAC with correction for СО is considered as the most optimum one as with disturbance attack on fuel expenditure so discharging beyond boiler furnace.

  1. Achieving reliable operation of a steam turbine's automatic control and protection system

    Science.gov (United States)

    Naumov, S. A.; Naumov, A. S.; Shvetsov, D. P.; Krymskii, A. V.

    2011-01-01

    The algorithms, procedures, and modules for making expert estimates of the technical state of automatic control and protection systems for different types of turbines by means of the SPIDER mobile computerized automation system are presented. It is shown that owing to high trustworthiness with which the kind and location of hidden defects of units are determined without disassembling them, repair works can be scheduled in the optimal way and the costs for carrying them out can be reduced.

  2. Modeling and automatic feedback control of tremor: adaptive estimation of deep brain stimulation.

    Directory of Open Access Journals (Sweden)

    Muhammad Rehan

    Full Text Available This paper discusses modeling and automatic feedback control of (postural and rest tremor for adaptive-control-methodology-based estimation of deep brain stimulation (DBS parameters. The simplest linear oscillator-based tremor model, between stimulation amplitude and tremor, is investigated by utilizing input-output knowledge. Further, a nonlinear generalization of the oscillator-based tremor model, useful for derivation of a control strategy involving incorporation of parametric-bound knowledge, is provided. Using the Lyapunov method, a robust adaptive output feedback control law, based on measurement of the tremor signal from the fingers of a patient, is formulated to estimate the stimulation amplitude required to control the tremor. By means of the proposed control strategy, an algorithm is developed for estimation of DBS parameters such as amplitude, frequency and pulse width, which provides a framework for development of an automatic clinical device for control of motor symptoms. The DBS parameter estimation results for the proposed control scheme are verified through numerical simulations.

  3. Inhibitory control gains from higher-order cognitive strategy training.

    Science.gov (United States)

    Motes, Michael A; Gamino, Jacquelyn F; Chapman, Sandra B; Rao, Neena K; Maguire, Mandy J; Brier, Matthew R; Kraut, Michael A; Hart, John

    2014-02-01

    The present study examined the transfer of higher-order cognitive strategy training to inhibitory control. Middle school students enrolled in a comprehension- and reasoning-focused cognitive strategy training program and passive controls participated. The training program taught students a set of steps for inferring essential gist or themes from materials. Both before and after training or a comparable duration in the case of the passive controls, participants completed a semantically cued Go/No-Go task that was designed to assess the effects of depth of semantic processing on response inhibition and components of event-related potentials (ERP) related to response inhibition. Depth of semantic processing was manipulated by varying the level of semantic categorization required for response selection and inhibition. The SMART-trained group showed inhibitory control gains and changes in fronto-central P3 ERP amplitudes on inhibition trials; whereas, the control group did not. The results provide evidence of the transfer of higher-order cognitive strategy training to inhibitory control and modulation of ERPs associated with semantically cued inhibitory control. The findings are discussed in terms of implications for cognitive strategy training, models of cognitive abilities, and education. PMID:24286804

  4. Training-induced behavioral and brain plasticity in inhibitory control

    OpenAIRE

    Lucas eSpierer; Camille eChavan; Aurelie Lynn Manuel

    2013-01-01

    Deficits in inhibitory control, the ability to suppress ongoing or planned motor or cognitive processes, contribute to many psychiatric and neurological disorders. The rehabilitation of inhibition-related disorders may therefore benefit from neuroplasticity-based training protocols aiming at normalizing inhibitory control proficiency and the underlying brain networks. Current literature on training-induced behavioral and brain plasticity in inhibitory control suggests that improvements may fo...

  5. Automatic training and reliability estimation for 3D ASM applied to cardiac MRI segmentation

    Science.gov (United States)

    Tobon-Gomez, Catalina; Sukno, Federico M.; Butakoff, Constantine; Huguet, Marina; Frangi, Alejandro F.

    2012-07-01

    Training active shape models requires collecting manual ground-truth meshes in a large image database. While shape information can be reused across multiple imaging modalities, intensity information needs to be imaging modality and protocol specific. In this context, this study has two main purposes: (1) to test the potential of using intensity models learned from MRI simulated datasets and (2) to test the potential of including a measure of reliability during the matching process to increase robustness. We used a population of 400 virtual subjects (XCAT phantom), and two clinical populations of 40 and 45 subjects. Virtual subjects were used to generate simulated datasets (MRISIM simulator). Intensity models were trained both on simulated and real datasets. The trained models were used to segment the left ventricle (LV) and right ventricle (RV) from real datasets. Segmentations were also obtained with and without reliability information. Performance was evaluated with point-to-surface and volume errors. Simulated intensity models obtained average accuracy comparable to inter-observer variability for LV segmentation. The inclusion of reliability information reduced volume errors in hypertrophic patients (EF errors from 17 ± 57% to 10 ± 18% LV MASS errors from -27 ± 22 g to -14 ± 25 g), and in heart failure patients (EF errors from -8 ± 42% to -5 ± 14%). The RV model of the simulated images needs further improvement to better resemble image intensities around the myocardial edges. Both for real and simulated models, reliability information increased segmentation robustness without penalizing accuracy.

  6. AUTOMATIC GENERATION CONTROL OF TWO AREA POWER SYSTEM WITH AND WITHOUT SMES: FROM CONVENTIONAL TO MODERN AND INTELLIGENT CONTROL

    Directory of Open Access Journals (Sweden)

    SATHANS,

    2011-05-01

    Full Text Available This work proposes a Fuzzy Gain Scheduled Proportional-Integral (FGSPI controller for automatic generation control (AGC of two-equal area interconnected thermal power system including the Superconducting Magnetic Energy Storage (SMES unit in both areas. The reheat effect nonlinearity of the steam turbine is also consideredin this study. Simulation results show that the proposed control scheme with SMES is very effective in damping the frequency and tie-line power oscillations due to load perturbations in one of the areas. To further improve the performance of the controller, a new formulation of the area control error (ACE is also adopted. Theproposed FGSPI controller is compared against conventional PI controller and state feedback LQR controller using settling times, overshoots and undershoots of the power and frequency deviations as performance indices and the performance of the proposed controller is found better than the other two. Simulations have been performed using Matlab®.

  7. Executive control training from middle childhood to adolescence.

    Science.gov (United States)

    Karbach, Julia; Unger, Kerstin

    2014-01-01

    Executive functions (EFs) include a number of higher-level cognitive control abilities, such as cognitive flexibility, inhibition, and working memory, which are instrumental in supporting action control and the flexible adaptation changing environments. These control functions are supported by the prefrontal cortex and therefore develop rapidly across childhood and mature well into late adolescence. Given that executive control is a strong predictor for various life outcomes, such as academic achievement, socioeconomic status, and physical health, numerous training interventions have been designed to improve executive functioning across the lifespan, many of them targeting children and adolescents. Despite the increasing popularity of these trainings, their results are neither robust nor consistent, and the transferability of training-induced performance improvements to untrained tasks seems to be limited. In this review, we provide a selective overview of the developmental literature on process-based cognitive interventions by discussing (1) the concept and the development of EFs and their neural underpinnings, (2) the effects of different types of executive control training in normally developing children and adolescents, (3) individual differences in training-related performance gains as well as (4) the potential of cognitive training interventions for the application in clinical and educational contexts. Based on recent findings, we consider how transfer of process-based executive control trainings may be supported and how interventions may be tailored to the needs of specific age groups or populations. PMID:24847294

  8. Executive control training from middle childhood to adolescence

    Directory of Open Access Journals (Sweden)

    JuliaKarbach

    2014-05-01

    Full Text Available Executive functions include a number of higher-level cognitive control abilities, such as cognitive flexibility, inhibition, and working memory serving action control and the flexible adaptation to changes in the environment. These control functions are supported by the prefrontal cortex and therefore develop rapidly across childhood and mature well into late adolescence. Given that executive control is a strong predictor for various life outcomes, such as academic attainment, socioeconomic status, and physical health, numerous training interventions have been designed to improve executive functioning across the lifespan, many of them targeting children and adolescents. Despite the increasing popularity of these trainings, their results are neither robust nor consistent, and the transferability of training-induced performance improvements to untrained tasks seems to be limited. In this review, we provide a selective overview of the developmental literature on process-based cognitive interventions by discussing (1 the concept and the development of executive functions and their neural underpinnings, (2 the effects of different types of executive control training in normally developing children and adolescents, (3 individual differences in training-related performance gains as well as (4 the potential of cognitive training interventions for the application in clinical and educational contexts. Based on recent findings, we consider how transfer of process-based executive control trainings may be supported and how interventions may be tailored to the needs of specific age groups or populations.

  9. CACTUS: Command and Control Training Using Knowledge-Based Simulations

    Science.gov (United States)

    Hartley, Roger; Ravenscroft, Andrew; Williams, R. J.

    2008-01-01

    The CACTUS project was concerned with command and control training of large incidents where public order may be at risk, such as large demonstrations and marches. The training requirements and objectives of the project are first summarized justifying the use of knowledge-based computer methods to support and extend conventional training…

  10. Fire Prevention and Control Training in the Oil Industry.

    Science.gov (United States)

    Edney, G. A.

    1979-01-01

    Training for fire prevention and control in the petroleum industry is vital for all personnel, clerical and management as well as operators, maintenance men, and drivers. Basic training practices in Britain stressing safety, vigilance, preparation, and realistic exercises are described. (MF)

  11. 77 FR 73589 - Positive Train Control Systems (RRR)

    Science.gov (United States)

    2012-12-11

    ... of processor-based train control systems. See 70 FR 11,052 (Mar. 7, 2005) (codified at 49 CFR part... passenger trains operating at greater than 59 miles per hour under Sec. 236.0(c)(2). See 75 FR 2598 at 2607...); Louisville Jeffersonville Bridge Co. v. United States, 249 U.S. 543 (1919); see also 66 FR 4104, 4148 (Jan...

  12. Automatic Control System of Ion Electrostatic Accelerator and Anti-Interference Measures

    International Nuclear Information System (INIS)

    An automatic control system for the electrostatic accelerator has been developed by adopting the PLC (Programmable Logic Controller) control technique, infrared and optical-fibre transmission technique and network communication with the purpose to improve the intelligence level of the accelerator and to enhance the ability of monitoring, collecting and recording parameters. In view of the control system' structure, some anti-interference measures have been adopted after analyzing the interference sources. The measures in hardware include controlling the position of the corona needle, using surge arresters, shielding, ground connection and stabilizing the voltage. The measures in terms of software involve inter-blocking protection, soft-spacing, time delay, and diagnostic and protective programs. The electromagnetic compatible ability of the control system has thus been effectively improved

  13. Application of digital process controller for automatic pulse operation in the NSRR

    International Nuclear Information System (INIS)

    The NSRR at JAERI is a modified TRIGA Reactor. It was built for investigating reactor fuel behavior under reactivity initiated accident (RIA) conditions. Recently, there has been a need to improve the flexibility of pulsing operations in the NSRR to cover a wide range of accidental situations, including RIA events at elevated power levels, and various abnormal power transients. To satisfy this need, we developed a new reactor control system which allows us to perform 'Shaped Pulse Operation: SP' and 'Combined Pulse Operation: CP'. Quick, accurate and complicated manipulation of control rods was required to realize these operations. Therefore we installed a new reactor control system, which we call an automatic pulse control system. This control system is composed of digital processing controllers and other digital equipments, and is fully automated and highly accurate. (author)

  14. The Role of Automatic Radiation Monitoring in Control of Illicit Trafficking of Radioactive Materials in Slovenia

    International Nuclear Information System (INIS)

    Automatic radiation monitoring in Slovenia comprises monitoring of external gamma radiation, aerosol radioactivity, radon progeny concentration, and radioactive deposition measurements. The officer on duty has an important part in assuring proper and undisturbed functioning of our automatic radiation monitoring. He is the one who gets the first alert message on radiation levels when exceeded pre-set values in the territory of Slovenia. Together with continuous control over the functioning of automatic radiation monitoring, the officer on duty has been also assigned for receiving messages from users, who carry the 'Radiation pager' (it is a trade mark for Sensor Technology Engineering, inc. from USA). All valuable experiences of the officer on duty who has been accepting reports from customs officers, police officers, from Slovenian radiation and nuclear safety inspectors, are described in this article. The officer on duty with his new role contributes to prevention of the illicit trafficking and inadvertent movement of radioactive materials over the territory of Slovenia. In the last year there where many different causes of emergency calls: from many cases of patient after radioisotopes medical treatment to serious rejected shipment with exceeded radiation. This is only a beginning of responsible task how to introduce and assure the control of the inadvertent movement of radioactive materials in Slovenia. (author)

  15. Automatic learning rate adjustment for self-supervising autonomous robot control

    Science.gov (United States)

    Arras, Michael K.; Protzel, Peter W.; Palumbo, Daniel L.

    1992-01-01

    Described is an application in which an Artificial Neural Network (ANN) controls the positioning of a robot arm with five degrees of freedom by using visual feedback provided by two cameras. This application and the specific ANN model, local liner maps, are based on the work of Ritter, Martinetz, and Schulten. We extended their approach by generating a filtered, average positioning error from the continuous camera feedback and by coupling the learning rate to this error. When the network learns to position the arm, the positioning error decreases and so does the learning rate until the system stabilizes at a minimum error and learning rate. This abolishes the need for a predetermined cooling schedule. The automatic cooling procedure results in a closed loop control with no distinction between a learning phase and a production phase. If the positioning error suddenly starts to increase due to an internal failure such as a broken joint, or an environmental change such as a camera moving, the learning rate increases accordingly. Thus, learning is automatically activated and the network adapts to the new condition after which the error decreases again and learning is 'shut off'. The automatic cooling is therefore a prerequisite for the autonomy and the fault tolerance of the system.

  16. Automatic Calibration of Frequency Compensation System in Computer-Controlled Patch-Clamp Amplifier

    Directory of Open Access Journals (Sweden)

    Jun Xion

    2007-01-01

    Full Text Available Computer-controlled patch-clamp amplifier is a digitally controlled analog device used to record the cellular ion channel currents in electrophysiology research. The inherent bandwidth and performance of the headstage is limited by the stray capacitance and distributed capacitance across the feedback resistors. In order to effectively improve the performance of the headstage, the paper advanced a simplified automatic calibration method of frequency compensation system in resistor-feedback patch-clamp amplifier. The dynamic model of headstage was approximate as a two poles and one zero system in the transfer function by experience and test results, so the dynamic characteristics of the headstage were obtained employing least squares parameter estimation algorithm. Further more, the compensation parameter of high frequency booster can be estimated by the time constant of main pole of headstage. And automatic adjustment of the parameters in transient response correction stage was performed as a least squares fitting problem. The software routine running on the host computer conducted all operations of frequency compensation. Experimental results demonstrate that the simplified automatic calibration method can substantially extend the bandwidth and minimize step response error of headstage.

  17. Design and Implementation of Electrostatic Spraying Automatic Controlling System Based on PLC

    Directory of Open Access Journals (Sweden)

    Weidong Jia

    2013-05-01

    Full Text Available The objective of this study was to improve the spraying efficiency and meet the demand of modern agricultural. A new generation of electrostatic sprayer which we designed realized the goals. The automatic controlling system is successfully designed. PLC (Programmable Logic Controller was taken as the control core of the system and LCD touch screen was employed for human-computer interaction interface. The system integrates kinds of techniques including programming, pressure monitoring and sensor technology, etc. The main structure of this equipment, working principle and control system hardware selection will be also introduced in the study. Human-computer interaction software was programmed by the software of Pro Tool/Pro CS. System controlling software was programmed in form of ladder diagram, which realized kinds of functions including ESD protection, accurate quantification, automatic controlling and humanized operation. Test results show that the effective spraying range is between 5 to 6 m, the Volume Median Diameter (VMD is 47.48 µm and the Ultra-Low Volume spray (ULV is realized. The spray deposition rate and effective availability of pesticide is higher than old sprayer. And also this new sprayer runs steadily.

  18. Clutch fill control of an automatic transmission for heavy-duty vehicle applications

    Science.gov (United States)

    Meng, Fei; Chen, Huiyan; Zhang, Tao; Zhu, Xiaoyuan

    2015-12-01

    In this paper an integrated clutch filling phase control for gearshifts on wet clutch transmissions is developed. In a clutch-to-clutch shift of an automatic transmission, in order to obtain smooth gearshift, it should synchronize the oncoming clutch and the off-going clutch timely as well as precise pressure control for the engagement of the oncoming clutch. However, before the oncoming clutch pressure starts to increase, the initial cavity of the clutch chamber has to be filled first. The filling time and stability of the fill phase are very important for the clutch control. In order to improve the shift quality of the automatic transmission which is equipped on heavy-duty vehicles, the electro-hydraulic clutch actuation system is analysed and modelled. A new fill phase control strategy is proposed based on the system analysis as well as the control parameters are optimized according to the variation of the oil temperature and engine speed. The designed strategy is validated by a simulation work. The results demonstrate that the proposed control strategy and parameters modified method can transit the shift process from the fill phase to the torque phase effectively.

  19. The use of tensiometers to automatically control the irrigation of ornamental species in containers

    Directory of Open Access Journals (Sweden)

    Laura Bacci

    Full Text Available The detection of soil water potential by means of tensiometers is one of the possible techniques to adapt water supply to real plant exigencies, reducing water and nutrient consumption and the environmental impact. The aim of the different experiments illustrated in this paper was the evaluation of tensiometer performances in the automatic control of the irrigation or fertigation of some ornamental species cultivated in containers. Different experiments were carried out over a two-year period on four ornamental species. Three species were cultivated outdoor and equipped with a drop irrigation system while the fourth was cultivated in greenhouse using two different irrigation techniques (drop and subirrigation. In all experiments, tensiometer-based system allowed water or nutrient solution saving ranging from 45% to 25% in comparison with timer-based irrigation management, without negatively affect plant growth and qualitative characteristics. Some arrangements to obtain the best performances of tensiometers in the automatic irrigation management are also illustrated.

  20. Conceptualization of automatic control actions for vapor pull-through experimental loop

    International Nuclear Information System (INIS)

    Vapour pull through is an important phenomena occurring through inlet feeders connected to horizontal stratified header in Pressurized Heavy Water Reactors (PHWRs). It occurs during the accident conditions and influences various safety parameters. A Test Facility was erected at Mechanical Engineering Department, MS University, Baroda, to carry out preliminary experiments to study vapour pull through for scaled down PHWR Header-Feeder configuration. Flow visualization study and preliminary measurements were carried out to understand the vapor pull through phenomena. A tentative correlation is developed with the study made so far. The facility comprises of air compressor, long horizontal pipe, test section, water pump, phase separator and various measuring devices. It is now being augmented by providing precise automatic control over various parameters like header pressure, level, downstream pressure in phase separator and differential pressure between header and phase separator. Presently, all the experiments are being carried out with manual control actions for all the important process parameters such as the test section, Phase Separator level and pressure. Details of the process parameters with the P and I diagram will be described in the paper along with basis for the desired control option. Module wise process dynamics simulation, starting from filling of the test section and testing under transient conditions will be carried out using analytical tools. This involves modeling and tuning of all the major controllers. Two types of control actions are desired. First kind involves the control actions required to bring the process parameters and initial operating condition to the desired values of the test matrix. The second kind of control action, are required during the experimental run. Both these action are incorporated in the same control module. Test Section Chamber pressure is controlled using compressed air reservoir and compressor. All other valves in air

  1. The Impact Of Increased Stability And Efficiency Through Automatic Control System For A Steam Power Plant

    Science.gov (United States)

    Ion Marian, Popescu

    2015-09-01

    This paper shows necessity for a new dynamic evolution of a energy goup in the context of, in the energy system, the wind and photovoltaic energy have priority. The actual automatic control systems, already implemented, allow analysis of more than 5,000 measuring points in real time, but also very consistent evolutionary history. In this context it is proposed and analysis solution, based on closed loop modeling, which can lead to knowledge of this complex process. Knowing with a high degree of accuracy of this process can lead to redesigning the control algorithms in the direction of increasing the stability and efficiency.

  2. Designing And Manufacture Of The Automatic Temperature Controller For Azeotropic Distillation Apparatus

    International Nuclear Information System (INIS)

    The process of establishing joint technology mark on the oil wells, Mark Technical Department of the Center for Applications of Nuclear Techniques in Industry (CANTI) have used the low carbon number alcohol like methanol (MeOH) attached 14C mark and Ethanol (EtOH) affixed 3H wells in the joint survey of rock and sand foundation. Fractional distillation technique used for separation and enrichment of alcohol. The radioactive isotope 14C and 3H in the marking compound after enrichment was analyzed by measurement of liquid scintillation counting. Mission design, installation and testing of 02 systems automatic temperature controller for distillation systems enriched tracers isotopes by the method of PID feedback control to stabilize the temperature at Isothermal, in order to increase yield by fractional distillation system enriched isotopes radioactive and stable and uniform distillation time of the distillation system, on the other hand, saving time of people who do experiments in distillation. The device includes a temperature control module integrates its PID Omron (OMRON E5CN-Q2HBT) is highly accurate and easy parameter setting right on the machine controller and displayed on the display; Solid State Relay (SSR) of the firm Omron (OMRON G3PA-210B) precision and high switching frequency, time delay for the switching process is 3ms, the large load 6A; BTA-06 triac circuit used to current controller provides heating stove; Thermocouple used with Omron's JPT 100 resolution thermal measurements from -200 to 500oC. The device can operate in two modes distilled through the switch back, the first mode is the mode of the old distillery system and mode 2 is the distillation mode automatically controls the temperature of the newly installed. Automatic temperature controller with an error in temperature for the two processes of fractional distillation is CANTI ±1oC; recovery efficiency of the two processes are analyzed to achieve > 65% for process MeOH and > 75% for the Et

  3. Operation logic and functionality of automatic dose rate and image quality control of conventional fluoroscopy

    International Nuclear Information System (INIS)

    New generation of fluoroscopic imaging systems is equipped with spectral shaping filters complemented with sophisticated automatic dose rate and image quality control logic called ''fluoroscopy curve'' or ''trajectory''. Such fluoroscopy curves were implemented first on cardiovascular angiographic imaging systems and are now available on conventional fluoroscopy equipment. This study aims to investigate the control logic operations under the fluoroscopy mode and acquisition mode (equivalent to the legacy spot filming) of a conventional fluoroscopy system typically installed for upper-lower gastrointestinal examinations, interventional endoscopy laboratories, gastrointestinal laboratory, and pain clinics.

  4. Effects of endurance training on brain structures in chronic schizophrenia patients and healthy controls.

    Science.gov (United States)

    Malchow, Berend; Keeser, Daniel; Keller, Katriona; Hasan, Alkomiet; Rauchmann, Boris-Stephan; Kimura, Hiroshi; Schneider-Axmann, Thomas; Dechent, Peter; Gruber, Oliver; Ertl-Wagner, Birgit; Honer, William G; Hillmer-Vogel, Ursula; Schmitt, Andrea; Wobrock, Thomas; Niklas, Andree; Falkai, Peter

    2016-06-01

    The objective of this longitudinal magnetic resonance (MR) imaging study was to examine the effects of endurance training on hippocampal and grey matter volumes in schizophrenia patients and healthy controls. 20 chronic schizophrenia patients and 21 age- and gender-matched healthy controls underwent 3months of endurance training (30min, 3 times per week). 19 additionally recruited schizophrenia patients played table soccer ("foosball" in the USA) over the same period. MR imaging with 3D-volumetric T1-weighted sequences was performed on a 3T MR scanner at baseline, after 6weeks and after the 3-month intervention and 3 additional training-free months. In addition to voxel-based morphometry (VBM), we performed manual and automatic delineation of the hippocampus and its substructures. Endurance capacity and psychopathological symptoms were measured as secondary endpoints. No significant increases in the volumes of the hippocampus or hippocampal substructures were observed in schizophrenia patients or healthy controls. However, VBM analyses displayed an increased volume of the left superior, middle and inferior anterior temporal gyri compared to baseline in schizophrenia patients after the endurance training, whereas patients playing table soccer showed increased volumes in the motor and anterior cingulate cortices. After the additional training-free period, the differences were no longer present. While endurance capacity improved in exercising patients and healthy controls, psychopathological symptoms did not significantly change. The subtle changes in the left temporal cortex indicate an impact of exercise on brain volumes in schizophrenia. Subsequent studies in larger cohorts are warranted to address the question of response variability of endurance training. PMID:25623601

  5. Increasing the effectiveness of instrumentation and control training programs using integrated training settings and a systematic approach to training

    International Nuclear Information System (INIS)

    The performance of plant maintenance-related tasks assigned to instrumentation and control (I ampersand C) technicians can be broken down into physical skills required to do the task; resident knowledge of how to do the task; effect of maintenance on plant operating conditions; interactions with other plant organizations such as operations, radiation protection, and quality control; and knowledge of consequences of miss-action. A technician who has learned about the task in formal classroom presentations has not had the advantage of integrating that knowledge with the requisite physical and communication skills; hence, the first time these distinct and vital parts of the task equation are put together is on the job, during initial task performance. On-the-job training provides for the integration of skills and knowledge; however, this form of training is limited by plant conditions, availability of supporting players, and training experience levels of the personnel conducting the exercise. For licensed operations personnel, most nuclear utilities use formal classroom and a full-scope control room simulator to achieve the integration of skills and knowledge in a controlled training environment. TU Electric has taken that same approach into maintenance areas by including identical plant equipment in a laboratory setting for the large portion of training received by maintenance personnel at its Comanche Peak steam electric station. The policy of determining training needs and defining the scope of training by using the systematic approach to training has been highly effective and provided training at a reasonable cost (approximately $18.00/student contact hour)

  6. Neural Network Control-Based Drive Design of Servomotor and Its Application to Automatic Guided Vehicle

    Directory of Open Access Journals (Sweden)

    Ming-Shyan Wang

    2015-01-01

    Full Text Available An automatic guided vehicle (AGV is extensively used for productions in a flexible manufacture system with high efficiency and high flexibility. A servomotor-based AGV is designed and implemented in this paper. In order to steer the AGV to go along a predefined path with corner or arc, the conventional proportional-integral-derivative (PID control is used in the system. However, it is difficult to tune PID gains at various conditions. As a result, the neural network (NN control is considered to assist the PID control for gain tuning. The experimental results are first provided to verify the correctness of the neural network plus PID control for 400 W-motor control system. Secondly, the AGV includes two sets of the designed motor systems and CAN BUS transmission so that it can move along the straight line and curve paths shown in the taped videos.

  7. Electric Drive Discrete Control System with Automatic Switching-On Reserve for Autonomous Settlement

    Directory of Open Access Journals (Sweden)

    Tsytovich L.I.

    2015-08-01

    Full Text Available The paper aims at developing of control the water supply system’s electric drives for autonomous settlement. The system provides automatic switching to a reserve control channel at refusal of any of the functional elements of the working regulation channel. Usually, such systems have a test signal generator and analyzer to system response to their impact. This result to an increase in the structural redundancy of the system, increase its cost and increase the requirements for the staff qualification. A specific feature of the system is its ability to self-diagnosis of catastrophic malfunctions of scheme’s components and an automatic switching-on the reserve control channels, without applying any test signals to the whole complex of electrical equipment. Multi-zone integrating regulator with frequency-pulse-width modulation realizes this technical solution. Control system structure and signals timing diagrams are presented. The construction principle of adaptive interval-code synchronization device with improved noise stability to control the voltage regulators serving for smooth start-up of asynchronous motors of water pumps is considered as well. Such solution allowing increase noise stability and reliability work of the system in conditions of limited power electrical networks, which is characteristic for the autonomous settlements. The article may be of interest to specialists in the field of power electronics and information electronics, electric drives and process automation.

  8. Automatic Generation Control in Multi Area Interconnected Power System by using HVDC Links

    Directory of Open Access Journals (Sweden)

    Yogendra Arya

    2012-01-01

    Full Text Available This paper investigates the effects of HVDC link in parallel with HVAC link on automatic generation control (AGC problem for a multi-area power system taking into consideration system parameter variations. A fuzzy logic controller is proposed for four area power system interconnected via parallel HVAC/HVDC transmission link which is also referred as asynchronous tie-lines. The linear model of HVAC/HVDC link is developed and the system responses to sudden load change are studied. The simulation studies are carried out for a four area interconnected thermal power system. Suitable solution for automatic generation control problem of four area electrical power system is obtained by means of improving the dynamic performance of power system under study. Robustness of controller is also checked by varying parameters. Simulation results indicate that the scheme works well. The dynamic analyses have been done with and without HVDC link using fuzzy logic controller in Matlab-Simulink. Further a comparison between the two is presented and it has been shown that the performance of the proposed scheme is superior in terms of overshoot and settling time.

  9. Application of GA optimization for automatic generation control design in an interconnected power system

    International Nuclear Information System (INIS)

    Highlights: → A realistic model for automatic generation control (AGC) design is proposed. → The model considers GRC, Speed governor dead band, filters and time delay. → The model provides an accurate model for the digital simulations. -- Abstract: This paper addresses a realistic model for automatic generation control (AGC) design in an interconnected power system. The proposed scheme considers generation rate constraint (GRC), dead band, and time delay imposed to the power system by governor-turbine, filters, thermodynamic process, and communication channels. Simplicity of structure and acceptable response of the well-known integral controller make it attractive for the power system AGC design problem. The Genetic algorithm (GA) is used to compute the decentralized control parameters to achieve an optimum operating point. A 3-control area power system is considered as a test system, and the closed-loop performance is examined in the presence of various constraints scenarios. It is shown that neglecting above physical constraints simultaneously or in part, leads to impractical and invalid results and may affect the system security, reliability and integrity. Taking to account the advantages of GA besides considering a more complete dynamic model provides a flexible and more realistic AGC system in comparison of existing conventional schemes.

  10. Application of GA optimization for automatic generation control design in an interconnected power system

    Energy Technology Data Exchange (ETDEWEB)

    Golpira, H., E-mail: hemin.golpira@uok.ac.i [Department of Electrical and Computer Engineering, University of Kurdistan, Sanandaj, PO Box 416, Kurdistan (Iran, Islamic Republic of); Bevrani, H. [Department of Electrical and Computer Engineering, University of Kurdistan, Sanandaj, PO Box 416, Kurdistan (Iran, Islamic Republic of); Golpira, H. [Department of Industrial Engineering, Islamic Azad University, Sanandaj Branch, PO Box 618, Kurdistan (Iran, Islamic Republic of)

    2011-05-15

    Highlights: {yields} A realistic model for automatic generation control (AGC) design is proposed. {yields} The model considers GRC, Speed governor dead band, filters and time delay. {yields} The model provides an accurate model for the digital simulations. -- Abstract: This paper addresses a realistic model for automatic generation control (AGC) design in an interconnected power system. The proposed scheme considers generation rate constraint (GRC), dead band, and time delay imposed to the power system by governor-turbine, filters, thermodynamic process, and communication channels. Simplicity of structure and acceptable response of the well-known integral controller make it attractive for the power system AGC design problem. The Genetic algorithm (GA) is used to compute the decentralized control parameters to achieve an optimum operating point. A 3-control area power system is considered as a test system, and the closed-loop performance is examined in the presence of various constraints scenarios. It is shown that neglecting above physical constraints simultaneously or in part, leads to impractical and invalid results and may affect the system security, reliability and integrity. Taking to account the advantages of GA besides considering a more complete dynamic model provides a flexible and more realistic AGC system in comparison of existing conventional schemes.

  11. To the problem of topological optimization of data processing and transmission networks in development of the automatic control system ''Atom''

    International Nuclear Information System (INIS)

    Some optimization problems occurring in developing the automatic control system (ASC) of a commercial amalgamation (ACS-ATOM), assessments of economically optimal structure of location of computation centres and means of data transmission in particular are considered

  12. INVARIAN AUTOMATIC CONTROL SYSTEM, USING THE INTERMEDIATE-FREQUENCY SIGNALS OF HEAT POWER PARAMETERS

    Directory of Open Access Journals (Sweden)

    G. T. Kulakov

    2015-01-01

    Full Text Available The usage of digital micro-processing automatic means allow to use design methods (technique of automatic control systems  more wider, and also to apply optimal ways of control, for example, it is possible to combine the Method of structural-parameter optimization and invariance theory. This method allow to increase essential system speed in processing of task jump and to reduce operation time of outside external disturbance up to two  values of regulated influence, and the usage of invariance principle is based on an additional measuring of the most dangerous perturbation influence and in connection with it the improvement of regulation quality is achieved.In this article the principle of invariance is applied in order to improve greatly external disturbance attack by consumption of over-heated steam. Compensation of disturbance influence on regulated value is achieving by introduction of additional signal on input of correction regulator from output of compensation device, measuring the external disturbance by consumption of over-heated steam.Modeling results of transient processes of cascade system of automatic control (CSAC, on the base of which were realized the unity of these methods, demonstrated the fact that, in processing of external disturbance by consumption of steam, the reduction of maximal dynamic regulation error is six times and cutting of regulation time by 30 % in comparison with CSAC without compensation device of external disturbance. And that is why it leads to the further reduction of maximal dynamic regulation error in processing of external disturbance by consumption of steam, and this allows to improve the quality of control.

  13. Automatic control with fuzzy logic of home-made beer production in maceration and cooking stages

    Directory of Open Access Journals (Sweden)

    Mariano Luján Corro

    2010-06-01

    Full Text Available The process of home-made beer production in the malt maceration and cooking stages was controlled automatically with fuzzy logic, across different performers considering the time and temperature of the process, using 2009LabVIEW. The equipment was mainly composed of three 20 L capacity stainless steel containers (water supply, maceration and cooking, an additional hops container, a data acquisition card (PIC 16F877a micro controller, three LM35 temperature sensors and 11 on/off type performers, which were governed by a total of 47 Mandani type fuzzy rules with trapezoidal membership functions, using the method of center area for the defuzzification. The performers: electrovalves (5, pumps (2, heaters (3 and a stirrer, in approximately 4 hours, were adequately controlled in their early maceration and cooking stages. The beer obtained by automatic control with fuzzy logic in the maceration and cooking stages, had the following characteristics: 0.98 g/cm3 of density, 3.9 of pH, total acidity expressed as 0.87% of lactic acid, 6.2ºGL of alcoholic degree and 0.91% w/v of CO2 percentage.

  14. The Implementation of Automatic Fire Rescuing and Information System in a Train using Zigbee and Sensors Networks.

    OpenAIRE

    Manoj Kumar Tyagi#1, Balanagu.Raviteja

    2013-01-01

    The demand for railway service, have consistently increasing in the last two decades. As a result, more strict safety requirements for railway signaling, control and infrastructure are needed. Same as railway service, in recent years, wireless technology have also advanced rapidly. Especially in this paper we are implementing a zigbee and sensor based information and rescuing system in a train to alert the authorities about the fire accident occurred. Zigbee and sensor network both are effect...

  15. Improvement of the Automatic System for Control of the Motion of a Physical Object under Uncertainty

    Directory of Open Access Journals (Sweden)

    V.V. Sheludchenko

    2015-10-01

    Full Text Available The effect of the coefficients of sensitivity and test impacts on the criterion of quality of the emergency deceleration control process of a physical object in terms of a significant change in the shape of the output characteristics and the position of the optimum that allowed to identify ways to improve the adaptive properties of automatic control systems (ACS of such objects is revealed. The relationship between the rational values of the ratio of trial stress and the measured parameters of the control object, which allowed to perform the optimization variable coefficient test impacts on the criterion of deviation of the control object from the extreme mode of operation is defined.

  16. A Novel Approach for Automatic Control of Piezoelectric Elements Used for Lorentz Force Detuning Compensation

    CERN Document Server

    Przygoda, K; Napieralski, A; Grecki, M

    2010-01-01

    Abstract: Linear accelerators such as Free Electron Lasers (FELs) use superconducting (SC) resonant cavities to accelerate electron beam to high energies. TESLA type resonators are extremely sensitive to detuning induced by mechanical deformations – Lorentz force detuning (LFD), mainly due to the extremely high quality factor (Q) of the 1.3 GHz resonance mode, in the range of 1e6. The resulting modulation of a resonance frequency of the cavity makes power consumption and stability performances of the Low-Latency Radio Frequency (LLRF) control more critical. In order to minimize the RF control efforts and desired stabilities, the fast piezoelectric actuators with digital control systems are commonly used. The paper presents a novel approach for automatic control of piezoelectric actuators used for compensation of Lorentz force detuning, the practical application and carried out tests in accelerating module ACC6 in Free-Electron Laser in Hamburg (FLASH).

  17. Digital controller for a Baum folding machine. [providing automatic counting and machine shutoff

    Science.gov (United States)

    Bryant, W. H. (Inventor)

    1974-01-01

    A digital controller for controlling the operation of a folding machine enables automatic folding of a desired number of sheets responsive to entry of that number into a selector. The controller includes three decade counter stages for corresponding rows of units, tens and hundreds push buttons. Each stage including a decimal-to-BCD encoder, a buffer register, and a digital or binary counter. The BCD representation of the selected count for each digit is loaded into the respective decade down counters. Pulses generated by a sensor and associated circuitry are used to decrease the count in the decade counters. When the content of the decade counter reaches either 0 or 1, a solenoid control valve is actuated which interrupts operation of the machine. A repeat switch, when actuated, prevents clearing of the buffer registers so that multiple groups of the same number of sheets can be folded without reentering the number into the selector.

  18. Developing an intelligent control system of automatic window motor with diverse wireless sensor network devices

    Indian Academy of Sciences (India)

    Yao-Chiang Kan; Hsueh-Chun Lin; Wen-Pei Sung

    2014-08-01

    This invention system involves hardware, firmware and software to develop an intelligent control system of automatic window motor with diverse wireless sensor network (WSN) devices for health and environmental monitoring. The parts of this invention are improved by implementing the WSN mote into environmental sensors that may detect temperature, humility, toxic gas, smog or aerosol, etc. With embedded system design, these sensors are capable of delivering WSN signal packets based on ZigBee protocol that follows the IEEE 802.14.4 standards. The primary hardware of the system is the window motor with circuit design by integrating micro control unit (MCU), radio frequency (RF) and WSN antenna to receive command. The firmware developed under embedded system can bridge hardware and software to control the window at the specified position. At the back end, the control system software can manage diverse sensor data and provide the interface for remote monitoring.

  19. Hybrid Chaotic Particle Swarm Optimization Based Gains For Deregulated Automatic Generation Control

    Directory of Open Access Journals (Sweden)

    Cheshta Jain Dr. H. K. Verma

    2011-12-01

    Full Text Available Generation control is an important objective of power system operation. In modern power system, the traditional automatic generation control (AGC is modified by incorporating the effect of bilateral contracts. This paper investigates application of chaotic particle swarm optimization (CPSO for optimized operation of restructured AGC system. To obtain optimum gains of controllers, application of adaptive inertia weight factor and constriction factors is proposed to improve performance of particle swarm optimization (PSO algorithm. It is also observed that chaos mapping using logistic map sequence increases convergence rate of traditional PSO algorithm. The hybrid method presented in this paper gives global optimum gains of controller with significant improvement in convergence rate over basic PSO algorithm. The effectiveness and efficiency of the proposed algorithm have been tested on two area restructure system.

  20. Differential Evolution for Optimization of PID Gains in Automatic Generation Control

    Directory of Open Access Journals (Sweden)

    Dr. L.D. Arya,

    2011-05-01

    Full Text Available Automatic generation control (AGC of a multi area power system provides power demand signals for AGC power generators to control frequency and tie-line power flow due to the large load changes or other disturbances. Occurrence of large megawatt imbalance causes large frequency deviations from its nominal value which may be a threat to secure operation of power system. To avoid such situation,emergency control to maintain the system frequency using differential evolution (DE based proportionalintegral- derivative (PID controller is proposed in this paper. DE is one of the most powerful stochastic real parameter optimization in current use. DE based optimum gains give better optimal transient response of frequency and tie line power changes compared to particle swarm optimization based gains.

  1. Designing of an Automatic Paraffin Controlling Device for a Beam Well

    Institute of Scientific and Technical Information of China (English)

    YAN Jian; LIU Xiao-juan; LI Shu-qin; YANG Shi-hao; ZHANG Ning-sheng

    2008-01-01

    Aiming at the paraffin-deposition problem of a beam well,the automatic paraffin-controlling device is designed by making use of ratchet-pallet mechanism,cam echanism and modern designing method.The device has four main functions:paraffin-controlling,paraffin removal,centralizing the pumping rod,and improving the safety of well tubing.This device integrates the advantages of the paraffin control,such as strong magnetic paraffin controlling and mechanical paraffin-cntting.Theoretical analysis shows that this device has fine working reliability.It turns out to be a new device which can solve the paraffin-deposition problem of a beam well economieally and efficiently.

  2. Control and accelerating voltage automatic pulse acquisition system for ''LIU-5/5000'' linear accelerators

    International Nuclear Information System (INIS)

    A system prowiding continuous control and automatic correction of actuation of accelerating voltage pulse generators of a linear induction accelerator is described. TGI-2500/50 thyratrons are switching elements of the generators. Shaped pulses have a bell form, their duration on the foundation constitues 300 ns. The device operation is based on the determination of a sign of time error between generator and reference pulses. Depending on the error sign performed is correction of the delay value included into the actuation circuit of the corresponding generator. Such operation is accomplished in each working pulse of the accelerator. Data on the delay condition go to the digital panel and digital print-out. Technical characteristics of the system are the following: 56 cynchronization channels, 155 ns control interval, 5 ns control pitch, error of the error determination is not worse than +-2.5 ns. The system permitted to improve accelerated beam stability and to simplify accelerator tuning and control

  3. A swarm-trained k-nearest prototypes adaptive classifier with automatic feature selection for interval data.

    Science.gov (United States)

    Silva Filho, Telmo M; Souza, Renata M C R; Prudêncio, Ricardo B C

    2016-08-01

    Some complex data types are capable of modeling data variability and imprecision. These data types are studied in the symbolic data analysis field. One such data type is interval data, which represents ranges of values and is more versatile than classic point data for many domains. This paper proposes a new prototype-based classifier for interval data, trained by a swarm optimization method. Our work has two main contributions: a swarm method which is capable of performing both automatic selection of features and pruning of unused prototypes and a generalized weighted squared Euclidean distance for interval data. By discarding unnecessary features and prototypes, the proposed algorithm deals with typical limitations of prototype-based methods, such as the problem of prototype initialization. The proposed distance is useful for learning classes in interval datasets with different shapes, sizes and structures. When compared to other prototype-based methods, the proposed method achieves lower error rates in both synthetic and real interval datasets. PMID:27152933

  4. Cyber Security Testing and Training Programs for Industrial Control Systems

    International Nuclear Information System (INIS)

    Service providers rely on industrial control systems (ICS) to manage the flow of water at dams, open breakers on power grids, control ventilation and cooling in nuclear power plants, and more. In today's interconnected environment, this can present a serious cyber security challenge. To combat this growing challenge, government, private industry, and academia are working together to reduce cyber risks. The Idaho National Laboratory (INL) is a key contributor to the Department of Energy National SCADA Test Bed (NSTB) and the Department of Homeland Security (DHS) Control Systems Security Program (CSSP), both of which focus on improving the overall security posture of ICS in the national critical infrastructure. In support of the NSTB, INL hosts a dedicated SCADA testing facility which consists of multiple control systems supplied by leading national and international manufacturers. Within the test bed, INL researchers systematically examine control system components and work to identify vulnerabilities. In support of the CSSP, INL develops and conducts training courses which are designed to increase awareness and defensive capabilities for IT/Control System professionals. These trainings vary from web-based cyber security trainings for control systems engineers to more advanced hands-on training that culminates with a Red Team/ Blue Team exercise that is conducted within an actual control systems environment. INL also provides staffing and operational support to the DHS Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) Security Operations Center which responds to and analyzes control systems cyber incidents across the 18 US critical infrastructure sectors.

  5. Carboy Security Testing and Training Programs for Industrial Control Systems

    International Nuclear Information System (INIS)

    Service providers rely on industrial control systems (ICS) to manage the flow of water at dams, open breakers on power grids, control ventilation and cooling in nuclear power plants, and more. In today's interconnected environment, this can present a serious cyber security challenge. To combat this growing challenge, government, private industry, and academia are working together to reduce cyber risks. The Idaho National Laboratory (INL) is a key contributor to the Department of Energy National SCADA Test Bed (NSTB) and the Department of Homeland Security (DHS) Control Systems Security Program (CSSP), both of which focus on improving the overall security posture of ICS in the national critical infrastructure. In support of the NSTB, INL hosts a dedicated SCADA testing facility which consists of multiple control systems supplied by leading national and international manufacturers. Within the test bed, INL researchers systematically examine control system components and work to identify vulnerabilities. In support of the CSSP, INL develops and conducts training courses which are designed to increase awareness and defensive capabilities for IT/Control System professionals. These training vary from web-based cyber security training for control systems engineers to more advanced hands-on training that culminates with a Red Team/Blue Team exercise that is conducted within an actual control systems environment. INL also provides staffing and operational support to the DHS Industrial Control Systems Cyber Emergency Response Team (ICS-CERT) Security Operations Center which responds to and analyzes control systems cyber incidents across the 18 US critical infrastructure sectors

  6. Dynamic Analysis and Control of an Automatic Transmission for Start-Stop Function and Efficiency Improvement

    OpenAIRE

    Yang Liu; Shuhan Wang; Peng Dong; Xiangyang Xu

    2015-01-01

    An electric oil pump (EOP) was integrated into the hydraulic system and an automatic transmission (AT) mechanical oil pump (MOP) was downsized. These processes were performed to combine a start-stop function with the AT and further improve the transmission efficiency. Furthermore, this study established a dynamics model of power loss and leakage of an 8-speed AT; a flow-based control algorithm of the EOP was then developed to realize the start-stop function and support the MOP to meet the flo...

  7. A review of automatic exposure control of conventional and digital systems

    International Nuclear Information System (INIS)

    The desirable properties and methods of achieving automatic exposure control in film-screen radiography, fluoroscopy, spot-film fluorography and cinefluorography are discussed. Advantages of certain methods in achieving optimum image quality for minimal patient exposure are considered. In digital subtraction fluorography (DSF) where relatively large exposure levels per image are used, proper set-up of exposure conditions is of particular importance. These systems require a high degree of stability in exposure to maintain a high level of image quality. We have developed test methods for monitoring the set-up and reproducibility of exposure levels in DSF. (author)

  8. Automatic quality control in the production of ceramic substrates by pulsed laser cutting

    DEFF Research Database (Denmark)

    Morace, Renate Erica; Hansen, Hans Nørgaard; De Chiffre, Leonardo; Østergaard, K.F.

    2004-01-01

    cavities on the cut face of thin ceramic substrates were investigated and different strategies to assess the depth and the pitch of cavities were compared. Then, the measurement uncertainty for these two critical parameters was evaluated using the method described in ISO/TS 15530-3.......This paper deals with the use of optical coordinate measuring machines (CMMs) in the quality control of ceramic substrates produced by a CO2 pulsed laser. A procedure of automatic measurements on a CMM equipped with a CCD camera was developed. In particular, the number and the distribution of...

  9. Automatic control system of high precision welding of workpieces in mechanical engineering

    Science.gov (United States)

    Kuznetsov, I. N.; Zvezdin, V. V.; Israfilov, I. H.; Portnov, S. M.

    2014-12-01

    In this paper, based on the conducted patent research, the system of laser welding control with different geometry of weld and shapes of parts is developed. The method of monitoring the position of the spot of laser radiation in relation to the curved weld is worked out; it is based on the tracking the edges of the welded parts by low-power laser radiation reflected from the surface of the parts. It allows to make the positioning of the focus of laser radiation in relation to the juncture of the welded parts automatically.

  10. A review of automatic exposure control of conventional and digital systems

    International Nuclear Information System (INIS)

    The desirable properties and methods of achieving automatic exposure control in film-screen radiography, fluoroscopy, spot-film fluorography and cinefluorography are discussed. Advantages of certain methods in achieving optimum image quality for minimal patient exposure are considered. In digital subtraction fluorography (DSF) where relatively large exposure levels per image are used, proper set-up of exposure conditions is of particular importance. These systems require a high degree of stability in exposure to maintain a high level of image quality. The authors developed test methods for monitoring the set-up and reproducibility of exposure levels in DSF. (author)

  11. High precision measurement of transistor noise with automatic calibration under computer control

    International Nuclear Information System (INIS)

    The preliminary selection of transistors for use in low noise pre-amplifiers requires the measurement of the equivalent noise voltage under various operating conditions including the temperature. Available equipment often lacks the necessary precision and is difficult to calibrate, especially when the device temperature is varied. Such equipment requires skill and patience from the operator. The authors describe a micro-computer controlled equipment which can measure transistor noise in the frequency range 10Hz to 100kHz to a greater accuracy than that previously obtainable. The transistor temperature and operating conditions may be scanned automatically over a wide range. Each measurement is internally calibrated

  12. Using fuzzy logic for automatic control: Case study of a problem of cereals samples classification

    Directory of Open Access Journals (Sweden)

    Lakhoua Najeh Mohamed

    2009-01-01

    Full Text Available The aim of this paper is to present the use of fuzzy logic for automatic control of industrial systems particularly the way to approach a problem of classification. We present a case study of a grading system of cereals that allows us to determine the price of transactions of cereals in Tunisia. Our contribution in this work consists in proposing not only an application of the fuzzy logic on the grading system of cereals but also a methodology enabling the proposing of a new grading system based on the concept of 'Grade' while using the fuzzy logic techniques. .

  13. Automatically controlled ventilation of gas, dust, or radon content, step by step (radio) or continuous

    International Nuclear Information System (INIS)

    Because of energy crises and the demand for a better environment underground, a study has been undertaken to determine whether automatic control of fans relative to diesel activity can be performed. Five different step by step regulation methods have been evaluated and two of them examined in detail by field tests. The temperature derivator method is recommended for use in starting and stopping crosscut fans and the radio method with ground plane antenna and coded signals is recommended for starting and stopping of gallery fans. To avoid overlap of radio waves between the ventilation moduli, it is necessary to use coded signals with different frequencies for each ventilation modulus

  14. Control-oriented Automatic System for Transport Analysis (ASTRA)-Matlab integration for Tokamaks

    International Nuclear Information System (INIS)

    The exponential growth in energy consumption has led to a renewed interest in the development of alternatives to fossil fuels. Between the unconventional resources that may help to meet this energy demand, nuclear fusion has arisen as a promising source, which has given way to an unprecedented interest in solving the different control problems existing in nuclear fusion reactors such as Tokamaks. The aim of this manuscript is to show how one of the most popular codes used to simulate the performance of Tokamaks, the Automatic System For Transport Analysis (ASTRA) code, can be integrated into the Matlab-Simulink tool in order to make easier and more comfortable the development of suitable controllers for Tokamaks. As a demonstrative case study to show the feasibility and the goodness of the proposed ASTRA-Matlab integration, a modified anti-windup Proportional Integral Derivative (PID)-based controller for the loop voltage of a Tokamak has been implemented. The integration achieved represents an original and innovative work in the Tokamak control area and it provides new possibilities for the development and application of advanced control schemes to the standardized and widely extended ASTRA transport code for Tokamaks. -- Highlights: → The paper presents a useful tool for rapid prototyping of different solutions to deal with the control problems arising in Tokamaks. → The proposed tool embeds the standardized Automatic System For Transport Analysis (ASTRA) code for Tokamaks within the well-known Matlab-Simulink software. → This allows testing and combining diverse control schemes in a unified way considering the ASTRA as the plant of the system. → A demonstrative Proportional Integral Derivative (PID)-based case study is provided to show the feasibility and capabilities of the proposed integration.

  15. Replicability of sight word training and phonics training in poor readers: a randomised controlled trial

    Directory of Open Access Journals (Sweden)

    G McArthur

    2015-05-01

    Full Text Available Given the importance of effective treatments for children with reading impairment, paired with growing concern about the lack of scientific replication in psychological science, the aim of this study was to replicate a quasi-randomised trial of sight word and phonics training using a randomised controlled trial (RCT design. One group of poor readers (N = 41 did 8 weeks of phonics training (i.e., phonological decoding and then 8 weeks of sight word training (i.e., whole-word recognition. A second group did the reverse order of training. Sight word and phonics training each had a large and significant valid treatment effect on trained irregular words and word reading fluency. In addition, combined sight word and phonics training had a moderate and significant valid treatment effect on nonword reading accuracy and fluency. These findings demonstrate the reliability of both phonics and sight word training in treating poor readers in an era where the importance of scientific reliability is under close scrutiny.

  16. Self-control training leads to enhanced cardiovascular exercise performance.

    Science.gov (United States)

    Bray, Steven R; Graham, Jeffrey D; Saville, Paul D

    2015-01-01

    The purpose of the study was to investigate the effects of two weeks of self-control strength training on maximum cardiovascular exercise performance. Forty-one participants completed a cognitive self-control depletion task (Stroop task) followed by a maximal graded cycling test and were randomized to training (maximal endurance contractions of spring handgrip trainers, twice daily) or no-treatment control groups. At follow-up (2 weeks), half of each group completed either a time-matched or trial-matched Stroop task followed by another maximal graded cycling test. Results showed a significant 2-way (training X time) interaction (P cognitive task) interaction (P = 0.07). Decomposition of the interactions revealed that across sessions cycling performance increased in both training groups, did not change in the trial-matched cognitive task control group, and declined in the time-matched control group. We conclude that isometric handgrip training leads to self-control strength adaptations that enhance maximal cardiovascular exercise performance or tolerance of exercise at maximal levels of effort. PMID:25278342

  17. Simulation and operation of the EBR-2 automatic control rod drive system

    Science.gov (United States)

    Lehto, W. K.; Larson, H. A.; Dean, E. M.; Christensen, L. J.

    An automatic control rod drive system (ACRDS) installed at EBR-II produces shaped power transients from 40% to full reactor power at a linear ramp rate of 4 MWt/s. A digital computer and modified control rod drive provides this capability. Simulation and analysis of ACRDS experiments establish the safety envelope for reactor transient operation. Tailored transients are required as part of USDOE operational reliability testing program for prototypic fast reactor fuel cladding breach behavior studies. After initial EBR-II driver fuel testing and system checkout, test subassemblies were subjected to both slow and fast transients. In addition, the ACRDS is used for steady state operation and will be qualified to control power ascent from initial critical to full power.

  18. Automatic Control Strategy Development for the Supercritical CO2 Brayton Cycle for LFR Autonomous Load Following

    International Nuclear Information System (INIS)

    The supercritical carbon dioxide (S-CO2) Brayton cycle is a promising advanced alternative to the Rankine saturated steam cycle and ideal gas Brayton cycle for the energy converters of specific reactor concepts belonging to the U.S. Department of Energy Generation IV Nuclear Energy Systems Initiative. A new plant dynamics analysis computer code has been developed for simulation of the S-CO2 Brayton cycle coupled to an autonomous Lead-Cooled Fast Reactor (LFR). The plant dynamics code was used to develop an automatic control strategy for the whole plant in response to changes in the demand from the electrical grid. The specific features of the S-CO2 Brayton cycle that result in limitations on the control range and speed of specific control mechanisms are discussed. Calculations of whole-plant responses to plant operational transients involving step and continuous changes in grid demand are demonstrated. (authors)

  19. Design and construction of indigenously electronic boards for the automatic control of MNSR

    International Nuclear Information System (INIS)

    Development, implementation, and manufacturing, indigenously, the first-of-a kind prototype of the electronic automatic control board of MSNR was made in this work. The new prototype includes some specific modifications that take into consideration the availability of electronic elements in the local market, the possibility to manufacture the control board indigenously, and the availability of such board as spare parts on reserve: The manufactured board has been tested (as cooled test) to check for functionality or malfunction before installation as part of the control and operating system. Later on, the board will be installed and tested as part of the above mentioned system to check whether it functions correctly under normal operating conditions (as hot test). (author)

  20. Multi-Stage Optimization Based Automatic Voltage Control Systems Considering Wind Power Forecasting Errors

    DEFF Research Database (Denmark)

    Qin, Nan; Bak, Claus Leth; Abildgaard, Hans;

    2016-01-01

    This paper proposes an automatic voltage control (AVC) system for power systems with limited continuous voltage control capability. The objective is to minimize the operational cost over a period, which consists of the power loss in the grid, the shunt switching cost, the transformer tap change...... cost and the generator reactive power output cost. The problem is formulated in a multi-stage optimal reactive power flow (MORPF) framework, solved by the nonlinear programming techniques via a rolling process. The voltage uncertainty caused by wind power forecasting errors is considered in the optimal...... electricity control center, where study cases based on the western Danish power system demonstrate the superiority of the proposed AVC system in term of the cost minimization. Monte Carlo simulations are carried out to verify the proposed method on the robustness improvements....

  1. Possibilities for Automatic Control of Hydro-Mechanical Transmission and Birotating Electric Machine

    Directory of Open Access Journals (Sweden)

    V. V. Mikhailov

    2014-04-01

    Full Text Available The paper presents mathematical models and results of virtual investigations pertaining to the selected motion parameters of a mobile machine equipped with hydro mechanical and modernized transmissions. The machine has been tested in similar technological cycles and it has been equipped with a universal automatic control system. Changes in structure and type of power transmission have been obtained with the help of a control algorithm including an extra reversible electric machine which is switched in at some operational modes.Implementation of the proposed  concept makes it possible to obtain and check the improved C-code of the control system and enhance operational parameters of the transmission and machine efficiency, reduce slippage and tire wear while using braking energy for its later beneficial use which is usually considered as a consumable element.

  2. Feedback control for a train-like vehicle

    International Nuclear Information System (INIS)

    This paper presents a feedback nonlinear control law for a train-like vehicle (TLV) used in nuclear power-station maintenance. The front cart is either manual or automated guided. The rear carts are feedback controlled. The control objective is to ensure that the rear carts track the path produced (on-line) by the front cart. This controller was experimentally tested on the TLV-prototype. (authors). 4 figs., 4 refs

  3. Radiological Control Technician: Phase 1, Site academic training study guides

    International Nuclear Information System (INIS)

    This volume is a study guide for training Radiological Control Technicians. Provided herein are support materials for learning radiological documentation, communication systems, counting errors and statistics, dosimetry, contamination control, airborne sampling program methods, respiratory protection, radiological source control, environmental monitoring, access control and work area setup, radiological work coverage, shipment and receipt for radioactive material, radiological incidents and emergencies, personnel decontamination, first aid, radiation survey instrumentation, contamination monitoring, air sampling, and counting room equipment

  4. Export control training - Experience and pedagogical lessons learned

    International Nuclear Information System (INIS)

    This series of slides draws a picture of the training offerings in export control within the framework of the International Nonproliferation Export Control Program. These courses are organized around 3 topics: licensing, enterprise outreach and enforcement. There are about 10 courses, a brief content of their curricula is given. The goal of these courses is not to make participants into export control experts or trade analysts, but enable them to properly take export controls into account. (A.C.)

  5. Automatic controller for steam generator water level during low power operation

    International Nuclear Information System (INIS)

    This research proposes a new controller which ensures a satisfactory automatic control for the steam generator water level from low power to full power. It is premised that the current analog control loop is replaced with digital computer control thus expanding the range of possible solutions. The proposed approach is to compensate the level measurement for thermal shrink and swell effects which cause complications in level control during low power operation. A non-linear digital predictor is a part of the controller and is used to estimate shrink and swell effects. The predictor is found to be stable and on-line applicable with micro-processors. The controller is evaluated by calculations in which it controls an existing non-linear digital computer model of a steam generator. For a multi-ramp power increase from low power to full power, the proposed controller shows good performances for the entire range. Water level settles down within 3 min after a single ramp increase (5% power increase in a minute) without any stability problem. Even at very low power, the maximum overshoot is judged to be acceptable. (orig.)

  6. Traffic Modelling for Moving-Block Train Control System

    Institute of Scientific and Technical Information of China (English)

    TANG Tao; LI Ke-Ping

    2007-01-01

    This paper presents a new cellular automaton (CA) model for train control system simulation.In the proposed CA model,the driver reactions to train movements are captured by some updated rules.The space-time diagram of traffic flow and the trajectory of train movement is used to obtain insight into the characteristic behavior of railway traffic flow.A number of simulation results demonstrate that the proposed CA model can be successfully used for the simulations of railway traffic.Not only the characteristic behavior of railway traffic flow can be reproduced,but also the simulation values of the minimum time headway are close to the theoretical values.

  7. Traffic Modelling for Moving-Block Train Control System

    International Nuclear Information System (INIS)

    This paper presents a new cellular automaton (CA) model for train control system simulation. In the proposed CA model, the driver reactions to train movements are captured by some updated rules. The space-time diagram of traffic flow and the trajectory of train movement is used to obtain insight into the characteristic behavior of railway traffic flow. A number of simulation results demonstrate that the proposed CA model can be successfully used for the simulations of railway traffic. Not only the characteristic behavior of railway traffic flow can be reproduced, but also the simulation values of the minimum time headway are close to the theoretical values.

  8. Designing Training for Temporal and Adaptive Transfer: A Comparative Evaluation of Three Training Methods for Process Control Tasks

    Science.gov (United States)

    Kluge, Annette; Sauer, Juergen; Burkolter, Dina; Ritzmann, Sandrina

    2010-01-01

    Training in process control environments requires operators to be prepared for temporal and adaptive transfer of skill. Three training methods were compared with regard to their effectiveness in supporting transfer: Drill & Practice (D&P), Error Training (ET), and procedure-based and error heuristics training (PHT). Communication electronics…

  9. Developing and implementing a training department quality control system

    International Nuclear Information System (INIS)

    One of the key problems facing nuclear training departments across the nation is keeping up with all of the requirements and commitments imposed externally and internally. When the Point Beach Training Group prepared for Accreditation Renewal, they found that a lot of things had slipped through the cracks and they had to put a lot of effort into correcting deficiencies. In order to prevent problems in the future they developed the Quality Control System described in this paper

  10. Training for power plant personnel on hydrogen production and control

    International Nuclear Information System (INIS)

    It is the purpose of this paper to address the issue of training for power plant personnel in the area of hydrogen control. The authors experience in the training business indicates that most of the operations and engineering personnel have a very limited awareness of this phenomenon. Topics discussed in this paper include: 1) theory of hydrogen combustion kinetics; 2) incidents involving hydrogen combustion events; 3) normal operations interfacing with hydrogen; 4) accident conditions; and 5) mitigation schemes

  11. INTEGRATED APPROACH TO LANGUAGE TRAINING OF AIR TRAFFIC CONTROLLERS

    Directory of Open Access Journals (Sweden)

    Olena Petrashchuk

    2014-06-01

    Full Text Available The article deals with the issue of integrative approach to language training of air traffic controllers in air traffic control simulator. The integrative approach is viewed in terms of two elements of English communicative competency: oral speech skills (listening comprehension and speaking and language of radiotelephony communication (radiotelephony phraseology and plain English in aviation context.

  12. Automatic Method for Controlling the Iodine Adsorption Number in Carbon Black Oil Furnaces

    Directory of Open Access Journals (Sweden)

    Zečević, N.

    2008-12-01

    Full Text Available There are numerous of different inlet process factors in carbon black oil furnaces which must be continuously and automatically adjusted, due to stable quality of final product. The most important six inlet process factors in carbon black oil-furnaces are:1. volume flow of process air for combustion2. temperature of process air for combustion3. volume flow of natural gas for insurance the necessary heat for thermal reaction of conversionthe hydrocarbon oil feedstock in oil-furnace carbon black4. mass flow rate of hydrocarbon oil feedstock5. type and quantity of additive for adjustment the structure of oil-furnace carbon black6. quantity and position of the quench water for cooling the reaction of oil-furnace carbon black.The control of oil-furnace carbon black adsorption capacity is made with mass flow rate of hydrocarbon feedstock, which is the most important inlet process factor. Oil-furnace carbon black adsorption capacity in industrial process is determined with laboratory analyze of iodine adsorption number. It is shown continuously and automatically method for controlling iodine adsorption number in carbon black oil-furnaces to get as much as possible efficient control of adsorption capacity. In the proposed method it can be seen the correlation between qualitatively-quantitatively composition of the process tail gasses in the production of oil-furnace carbon black and relationship between air for combustion and hydrocarbon feedstock. It is shown that the ratio between air for combustion and hydrocarbon oil feedstock is depended of adsorption capacity summarized by iodine adsorption number, regarding to BMCI index of hydrocarbon oil feedstock.The mentioned correlation can be seen through the figures from 1. to 4. From the whole composition of the process tail gasses the best correlation for continuously and automatically control of iodine adsorption number is show the volume fraction of methane. The volume fraction of methane in the

  13. Solution Approach to Automatic Generation Control Problem Using Hybridized Gravitational Search Algorithm Optimized PID and FOPID Controllers

    Directory of Open Access Journals (Sweden)

    DAHIYA, P.

    2015-05-01

    Full Text Available This paper presents the application of hybrid opposition based disruption operator in gravitational search algorithm (DOGSA to solve automatic generation control (AGC problem of four area hydro-thermal-gas interconnected power system. The proposed DOGSA approach combines the advantages of opposition based learning which enhances the speed of convergence and disruption operator which has the ability to further explore and exploit the search space of standard gravitational search algorithm (GSA. The addition of these two concepts to GSA increases its flexibility for solving the complex optimization problems. This paper addresses the design and performance analysis of DOGSA based proportional integral derivative (PID and fractional order proportional integral derivative (FOPID controllers for automatic generation control problem. The proposed approaches are demonstrated by comparing the results with the standard GSA, opposition learning based GSA (OGSA and disruption based GSA (DGSA. The sensitivity analysis is also carried out to study the robustness of DOGSA tuned controllers in order to accommodate variations in operating load conditions, tie-line synchronizing coefficient, time constants of governor and turbine. Further, the approaches are extended to a more realistic power system model by considering the physical constraints such as thermal turbine generation rate constraint, speed governor dead band and time delay.

  14. Increased vitamin plasma levels in Swedish military personnel treated with nutrients prior to automatic weapon training

    Directory of Open Access Journals (Sweden)

    C G Le Prell

    2011-01-01

    Full Text Available Noise-induced hearing loss (NIHL is a significant clinical, social, and economic issue. The development of novel therapeutic agents to reduce NIHL will potentially benefit multiple very large noise-exposed populations. Oxidative stress has been identified as a significant contributor to noise-induced sensory cell death and NIHL, and several antioxidant strategies have now been suggested for potential translation to human subjects. One such strategy is a combination of beta-carotene, vitamins C and E, and magnesium, which has shown promise for protection against NIHL in rodent models, and is being evaluated in a series of international human clinical trials using temporary (military gunfire, audio player use and permanent (stamping factory, military airbase threshold shift models (NCT00808470. The noise exposures used in the recently completed Swedish military gunfire study described in this report did not, on average, result in measurable changes in auditory function using conventional pure-tone thresholds and distortion product otoacoustic emission (DPOAE amplitudes as metrics. However, analysis of the plasma samples confirmed significant elevations in the bloodstream 2 hours after oral consumption of active clinical supplies, indicating the dose is realistic. The plasma outcomes are encouraging, but clinical acceptance of any novel therapeutic critically depends on demonstration that the agent reduces noise-induced threshold shift in randomized, placebo-controlled, prospective human clinical trials. Although this noise insult did not induce hearing loss, the trial design and study protocol can be applied to other populations exposed to different noise insults.

  15. Tunning PID controller using particle swarm optimization algorithm on automatic voltage regulator system

    Science.gov (United States)

    Aranza, M. F.; Kustija, J.; Trisno, B.; Hakim, D. L.

    2016-04-01

    PID Controller (Proportional Integral Derivative) was invented since 1910, but till today still is used in industries, even though there are many kind of modern controllers like fuzz controller and neural network controller are being developed. Performance of PID controller is depend on on Proportional Gain (Kp), Integral Gain (Ki) and Derivative Gain (Kd). These gains can be got by using method Ziegler-Nichols (ZN), gain-phase margin, Root Locus, Minimum Variance dan Gain Scheduling however these methods are not optimal to control systems that nonlinear and have high-orde, in addition, some methods relative hard. To solve those obstacles, particle swarm optimization (PSO) algorithm is proposed to get optimal Kp, Ki and Kd. PSO is proposed because PSO has convergent result and not require many iterations. On this research, PID controller is applied on AVR (Automatic Voltage Regulator). Based on result of analyzing transient, stability Root Locus and frequency response, performance of PID controller is better than Ziegler-Nichols.

  16. GSM Web-Based Centralized Remote Wireless Automatic Controlling and Monitoring of Aquafeeder

    Science.gov (United States)

    Wong, C. L.; Idris, A.; Hasan, Z.

    2016-03-01

    This project is about producing a prototype to feed fishes at fish ponds of remote location with the use of GSM mobile phone. An automatic fish feeder is an electric device that has been designed to give out the right amount of pellets at the designed time. In this project, the automatic feeder designed consists of photovoltaic solar cells that are used to generate electricity and storing it into batteries. Solar charge controllers can be used to determine the rate of which current is drawn and added from the batteries. GSM cellular communication is used to allow user to control from a distance. Commands or instructions are sent to the operating system which in return runs the servomotor and blower by blowing certain amount of fish pallets into the pond to feed the fishes. The duration of the feeding processes is fixed by the user, hence the amount of fish food pallets released are precisely the same for each time. This technology is especially useful for fish farmers where they can remotely feed their fishes.

  17. The evaluation of the performance of the automatic exposure control system of some selected mammography facilities in the Greater Accra Region, Ghana

    International Nuclear Information System (INIS)

    Mammography aids in the early detection of breast cancer. X-rays has an associated risk of inducing cancer though very useful and as such mammography procedures should be optimized through the appropriate processes such as the selection of exposure factors for an optimum image and minimal dose to patients. The automatic exposure control (AEC) aids in the selection of exposure factors thus controlling the amount of radiation to the breast and automatically compensates for differences in the breast thickness and density. The performance of the automatic exposure control system of mammography equipment and the status of quality management systems including quality assurance and quality controls of four (4) mammography facilities within the Greater Accra Region were assessed. In assessing the performance of the automatic exposure control system, the short term reproducibility test, thickness and voltage compensation test were carried out using breast equivalent phantom of various thicknesses. Half value layer test, film reject analysis and patient dose assessment were also performed. Analysis of the responses of the questionnaire administered to radiographers and supervisors of the selected facilities revealed that three (3) of the facilities have some aspect of quality management system programme in place but not effectively implemented. Measured optical densities from the various tests performed to evaluate the performance of the automatic exposure control systems revealed that the AEC compensates for the different phantom thickness and tube voltage (KV) by producing comparable optical densities for the various phantom thickness and tube voltages. Some of the measured optical densities were within the recommended optical density range of 1.5 OD - 1.9 OD. The highest optical density value was 0.13 OD above the highest limit of 1.9 OD. The film reject analysis showed that patient motion accounted for the large part (28%) of film rejects. Other factors such as too light

  18. Availability verification of information for human system interface in automatic SG level control using activity diagram

    International Nuclear Information System (INIS)

    Steam Generator (SG) level control system in OPR 1000 is one of representative automatic systems that falls under the Supervisory Control level in Endsley's taxonomy. Supervisory control of automated systems is classified as a form of out of the loop (OOTL) performance due to passive involvement in the systems operation, which could lead to loss of situation awareness (SA). There was a reported event, which was caused by inadequate human automation communication that contributed to an unexpected reactor trip in July 2005. A high SG level trip occurred in Yeonggwang (YGN) Unit 6 Nuclear Power Plant (NPP) due to human operator failure to recognize the need to change the control mode of the economizer valve controller (EVC) to manual mode during swap over (the transition from low power mode to high power mode) after the loss of offsite power (LOOP) event was recovered. This paper models the human system interaction in NPP SG level control system using Unified Modeling Language (UML) Activity Diagram. Then, it identifies the missing information for operators in the OPR1000 Main Control Room (MCR) and suggests some means of improving the human system interaction

  19. Training Center for Industrial Control Systems

    Directory of Open Access Journals (Sweden)

    V. Yezhov

    2014-09-01

    Full Text Available We consider the application of embedded microcontrollers and industrial controllers with built-in operating systems.With the development of embedded operating systems and technology of open standard IEC 61131-3 product developer can write their own program management and support staff – to modernize management program.

  20. 76 FR 52918 - Positive Train Control Systems

    Science.gov (United States)

    2011-08-24

    ... control systems. See 70 FR 11,052 (Mar. 7, 2005) (codified at 49 CFR part 236, subpart H). As a..., 2015. 75 FR 2598 (Jan. 15, 2010). Under RSIA, such PTC implementation must be completed by each Class I... 13563 on January 18, 2011 (76 FR 3821 (Jan. 21, 2011)), which outlined a plan to improve regulations...

  1. 75 FR 2597 - Positive Train Control Systems

    Science.gov (United States)

    2010-01-15

    ... control systems without impairing technological development. 70 FR 11,052 (Mar. 7, 2005). FRA intended... ACSES. See 63 FR 39,343 (July 22, 1998). ACSES was installed between 2000 and 2002, and has functioned....49(oo); 74 FR 26,981 (June 5, 2009); see also 49 U.S.C. 103(g). In the RSIA08, Congress...

  2. Automatic setting of machine control with physics operation parameters at ASDEX Upgrade

    International Nuclear Information System (INIS)

    Performing plasma fusion experiments in a tokamak relies on close cooperation between discharge control (DCS) and machine control (MCS) systems, where the DCS's task is generating and handling the plasma, and the MCS is responsible for providing and configuring the necessary actuators. With a reduced number of experiment cycles per day, in consequence of long pulses or ambitious discharge scenarios, optimal utilization of resources as well as avoiding mismatches between the MCS' and DCS' configurations becomes increasingly important. Setting up the MCS for discharges currently relies on informal communication and requires careful attention of operators and session leaders. To enforce correspondence between MCS and DCS parametrizations, an automatic mediator agent formalizes the pre-shot configuration procedure. Functionality of the mediator and protocols for embedding into the existing system are discussed

  3. Embedded Wireless Based Communications and Security Application for Oilfield for Automatic Controlling

    Directory of Open Access Journals (Sweden)

    Ganesh V Padole

    2011-07-01

    Full Text Available The site of oil-well is distributed dispersedly, but distribution area is wide. Oil exhauster continuous working for 24 hours. As the problem of petroleum being stolen, transmission line being stolen, and transformer being stolen exists which requires the strong secures management system. With Consideration of the objective condition restriction of geographical environment, the implementation of safe management for oilfield is very difficult. We overcome these difficulties, which comes from geographical environment. The cost is not only high if the fiber cable would be lay between working station in the several tens of square kilometers, but also need to put into a lot of human and material resources with line maintenance and guard against theft. It is a perfect scheme that remote wireless monitoring and control system is established. The system is required to manage the data received from the various site and providing the security by managing and providing automatic controlling structure.

  4. A Semi-Automatic, Remote-Controlled Video Observation System for Transient Luminous Events

    DEFF Research Database (Denmark)

    Allin, Thomas Højgaard; Neubert, Torsten; Laursen, Steen;

    2003-01-01

    Pic du Midi Observatory in Southern France, the system was operational during the period from July 18 to September 15, 2003. The video system, based two low-light, non-intensified CCD video cameras, was mounted on top of a motorized pan/tilt unit. The cameras and the pan/tilt unit were controlled over......In support for global ELF/VLF observations, HF measurements in France, and conjugate photometry/VLF observations in South Africa, we developed and operated a semi-automatic, remotely controlled video system for the observation of middle-atmospheric transient luminous events (TLEs). Installed at the...... serial links from a local computer, and the video outputs were distributed to a pair of PCI frame grabbers in the computer. This setup allowed remote users to log in and operate the system over the internet. Event detection software provided means of recording and time-stamping single TLE video fields...

  5. Automatic control of electric thermal storage (heat) under real-time pricing. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Daryanian, B.; Tabors, R.D.; Bohn, R.E. [Tabors Caramanis and Associates, Inc. (United States)

    1995-01-01

    Real-time pricing (RTP) can be used by electric utilities as a control signal for responsive demand-side management (DSM) programs. Electric thermal storage (ETS) systems in buildings provide the inherent flexibility needed to take advantage of variations in prices. Under RTP, optimal performance for ETS operations is achieved under market conditions where reductions in customers` costs coincide with the lowering of the cost of service for electric utilities. The RTP signal conveys the time-varying actual marginal cost of the electric service to customers. The RTP rate is a combination of various cost components, including marginal generation fuel and maintenance costs, marginal costs of transmission and distribution losses, and marginal quality of supply and transmission costs. This report describes the results of an experiment in automatic control of heat storage systems under RTP during the winter seasons of 1989--90 and 1990--91.

  6. High user control in game design elements increases compliance and in-game performance in a memory training game

    Directory of Open Access Journals (Sweden)

    Aniket eNagle

    2015-11-01

    Full Text Available Computer games are increasingly being used for training cognitive functions like working memory and attention among the growing population of older adults. While cognitive training games often include elements like difficulty adaptation, rewards, and visual themes to make the games more enjoyable and effective, the effect of different degrees of afforded user control in manipulating these elements has not been systematically studied. To address this issue, two distinct implementations of the three aforementioned game elements were tested among healthy older adults (N = 21, 69.9 ± 6.4 years old playing a game-like version of the n-back task on a tablet at home for three weeks. Two modes were considered, differentiated by the afforded degree of user control of the three elements: user control of difficulty vs. automatic difficulty adaptation, difficulty-dependent rewards vs. automatic feedback messages, and user choice of visual theme vs. no choice. The two modes (USER-CONTROL and AUTO were compared for frequency of play, duration of play, and performance. Participants were free to play the game whenever and for however long they wished. Participants in USER-CONTROL exhibited significantly higher frequency of playing, total play duration, and performance than participants in AUTO. The results of the present study demonstrate the efficacy of providing user control in the three game elements, while validating a home-based study design in which participants were not bound by any training regimen, and could play the game whenever they wished. The results have implications for designing cognitive training games that elicit higher compliance and better performance, with an emphasis on home-based training.

  7. High User Control in Game Design Elements Increases Compliance and In-game Performance in a Memory Training Game.

    Science.gov (United States)

    Nagle, Aniket; Riener, Robert; Wolf, Peter

    2015-01-01

    Computer games are increasingly being used for training cognitive functions like working memory and attention among the growing population of older adults. While cognitive training games often include elements like difficulty adaptation, rewards, and visual themes to make the games more enjoyable and effective, the effect of different degrees of afforded user control in manipulating these elements has not been systematically studied. To address this issue, two distinct implementations of the three aforementioned game elements were tested among healthy older adults (N = 21, 69.9 ± 6.4 years old) playing a game-like version of the n-back task on a tablet at home for 3 weeks. Two modes were considered, differentiated by the afforded degree of user control of the three elements: user control of difficulty vs. automatic difficulty adaptation, difficulty-dependent rewards vs. automatic feedback messages, and user choice of visual theme vs. no choice. The two modes ("USER-CONTROL" and "AUTO") were compared for frequency of play, duration of play, and in-game performance. Participants were free to play the game whenever and for however long they wished. Participants in USER-CONTROL exhibited significantly higher frequency of playing, total play duration, and in-game performance than participants in AUTO. The results of the present study demonstrate the efficacy of providing user control in the three game elements, while validating a home-based study design in which participants were not bound by any training regimen, and could play the game whenever they wished. The results have implications for designing cognitive training games that elicit higher compliance and better in-game performance, with an emphasis on home-based training. PMID:26635681

  8. Automatic control of finite element models for temperature-controlled radiofrequency ablation

    Directory of Open Access Journals (Sweden)

    Haemmerich Dieter

    2005-07-01

    Full Text Available Abstract Background The finite element method (FEM has been used to simulate cardiac and hepatic radiofrequency (RF ablation. The FEM allows modeling of complex geometries that cannot be solved by analytical methods or finite difference models. In both hepatic and cardiac RF ablation a common control mode is temperature-controlled mode. Commercial FEM packages don't support automating temperature control. Most researchers manually control the applied power by trial and error to keep the tip temperature of the electrodes constant. Methods We implemented a PI controller in a control program written in C++. The program checks the tip temperature after each step and controls the applied voltage to keep temperature constant. We created a closed loop system consisting of a FEM model and the software controlling the applied voltage. The control parameters for the controller were optimized using a closed loop system simulation. Results We present results of a temperature controlled 3-D FEM model of a RITA model 30 electrode. The control software effectively controlled applied voltage in the FEM model to obtain, and keep electrodes at target temperature of 100°C. The closed loop system simulation output closely correlated with the FEM model, and allowed us to optimize control parameters. Discussion The closed loop control of the FEM model allowed us to implement temperature controlled RF ablation with minimal user input.

  9. Effect of Playful Balancing Training - A Pilot Randomized Controlled Trial

    DEFF Research Database (Denmark)

    Lund, Henrik Hautop; Jessen, Jari Due

    2013-01-01

    increase in balancing performance (DGI score: 21.3) after short-term playful training with the modular interactive tiles, whereas the control group remained with a score indicating balancing problems and risk of falling (DGI score: 16.6). The small pilot randomized controlled trial suggests that the......We used the modular playware in the form of modular interactive tiles for playful training of community-dwelling elderly with balancing problem. During short-term play on the modular interactive tiles, the elderly were playing physical, interactive games that were challenging their dynamic balance...

  10. A Simulink Library of cryogenic components to automatically generate control schemes for large Cryorefrigerators

    Science.gov (United States)

    Bonne, François; Alamir, Mazen; Hoa, Christine; Bonnay, Patrick; Bon-Mardion, Michel; Monteiro, Lionel

    2015-12-01

    In this article, we present a new Simulink library of cryogenics components (such as valve, phase separator, mixer, heat exchanger...) to assemble to generate model-based control schemes. Every component is described by its algebraic or differential equation and can be assembled with others to build the dynamical model of a complete refrigerator or the model of a subpart of it. The obtained model can be used to automatically design advanced model based control scheme. It also can be used to design a model based PI controller. Advanced control schemes aim to replace classical user experience designed approaches usually based on many independent PI controllers. This is particularly useful in the case where cryoplants are submitted to large pulsed thermal loads, expected to take place in future fusion reactors such as those expected in the cryogenic cooling systems of the International Thermonuclear Experimental Reactor (ITER) or the Japan Torus-60 Super Advanced Fusion Experiment (JT- 60SA). The paper gives the example of the generation of the dynamical model of the 400W@1.8K refrigerator and shows how to build a Constrained Model Predictive Control for it. Based on the scheme, experimental results will be given. This work is being supported by the French national research agency (ANR) through the ANR-13-SEED-0005 CRYOGREEN program.

  11. Cardiovascular Automatic Feedback Control Instrument for Rescuing Critical Patients With Abnormal Blood Pressure

    Institute of Scientific and Technical Information of China (English)

    Ge Yuzhi; Wu Zhiting; Sheng Guotai; Li Gang

    2006-01-01

    Objectives Most medical instruments are designed for diagnosis purpose but very few for clinical treatment. Our research aim is to design and develop a cardiovascular automatic feedback control instrument (CAFCI) for rescuing the critical patients with abnormal blood pressure.Methods The CAFCI was designed on the basis of abundant clinical experiences and on successful mathematic modeling of our experimental data. The blood pressure, pulmonary capillary wedge pressure,and rates of heart beat were measured and inputted into a computer and drugs were chosen by a doctor through a user-friendly interface with the computer.The responses to medication were rapidly acquired and feed back to the computer by automatic detection system in a close-loop system. The data were refreshed every 7.5 sec in order to regulate the speed and dosage of the medications that were given. Results The experimental results with ten dogs showed that the CAFCI system took samples promptly and accurately so that the targeted blood pressure could be reached reliably based on our input parameters and our designing requirements. Conclusions Since the dependability and accuracy of the CAFCI system are much superior to that of the traditional method, its clinical application to rescue the critical patient warrants evaluation in the future.

  12. Single-beam water vapor detection system with automatic photoelectric conversion gain control

    Science.gov (United States)

    Zhu, C. G.; Chang, J.; Wang, P. P.; Wang, Q.; Wei, W.; Liu, Z.; Zhang, S. S.

    2014-11-01

    A single-beam optical sensor system with automatic photoelectric conversion gain control is proposed for doing high reliability water vapor detection under relatively rough environmental conditions. Comparing to a dual-beam system, it can distinguish the finer photocurrent variations caused by the optical power drift and provide timely compensation by automatically adjusting the photoelectric conversion gain. This system can be rarely affected by the optical power drift caused by fluctuating ambient temperature or variation of fiber bending loss. The deviation of the single-beam system is below 1.11% when photocurrent decays due to fiber bending loss for bending radius of 5 mm, which is obviously lower than the dual-beam system (8.82%). We also demonstrate the long-term stability of the single-beam system by monitoring a 660 ppm by volume (ppmv) water vapor sample continuously for 24 h. The maximum deviation of the measured concentration during the whole testing period does not exceed 10 ppmv. Experiments have shown that the new system features better reliability and is more apt for remote sensing application which is often subject to light transmission loss.

  13. Executive control and felt concentrative engagement following intensive meditation training

    Directory of Open Access Journals (Sweden)

    Anthony Paul Zanesco

    2013-09-01

    Full Text Available Various forms of mental training have been shown to improve performance on cognitively demanding tasks. Individuals trained in meditative practices, for example, show generalized improvements on a variety of tasks assessing attentional performance. A central claim of this training, derived from contemplative traditions, posits that improved attentional performance is accompanied by subjective increases in the stability and clarity of concentrative engagement with one’s object of focus, as well as reductions in felt cognitive effort as expertise develops. However, despite frequent claims of mental stability following training, the phenomenological correlates of meditation-related attentional improvements have yet to be characterized. In a longitudinal study, we assessed changes in executive control (performance on a 32-minute response inhibition task and retrospective reports of task engagement (concentration, motivation, and effort following one month of intensive, daily Vipassana meditation training. Compared to matched controls, training participants exhibited improvements in response inhibition accuracy and reductions in reaction time variability. The training group also reported increases in concentration, but not effort or motivation, during task performance. Critically, increases in concentration predicted improvements in reaction time variability, suggesting a link between the experience of concentrative engagement and ongoing fluctuations in attentional stability. By incorporating experiential measures of task performance, the present study corroborates phenomenological accounts of stable, clear attentional engagement with the object of meditative focus following extensive training. These results provide initial evidence that meditation-related changes in felt experience accompany improvements in adaptive, goal-directed behavior, and that such shifts may reflect accurate awareness of measurable changes in performance.

  14. Lower limb control and mobility following exercise training

    Directory of Open Access Journals (Sweden)

    Kim Sukwon

    2012-02-01

    Full Text Available Abstract The objective of the present study was to evaluate the effects of 8-week balance or weight training on ankle joint stiffness and limb stability for older adults, furthermore, on outcomes of slips while walking. Eighteen older adults volunteered for the study and randomly were assigned to the three groups, such as, weight, balance, or control group. While walking on a walking track, three-dimensional posture data were sampled and ankle joint stiffness and limb stability were computed to evaluate the effects of training. 2 (pre and post × 3 (weight, balance, and control × 2 (dominant and non-dominant legs mixed factor repeated ANOVA was performed. The results indicated that only balance training group showed an improvement in joint stiffness and both the training groups showed improvements in limb stability. Also, fall frequency results suggested that joint stiffness and limb stability had an effect on the likelihood of slip-induced falls. In conclusion, training can facilitate improvements in joint and limb control mechanism for older adults contributing to an improvement in the likelihood of slip-induced falls.

  15. Power Measurement and Automatic Reactor Control by Gamma- or Cerenkov-Radiation

    International Nuclear Information System (INIS)

    A power measuring system is described using the gamma and Cerenkov radiation from the reactor core. A measuring device based on the above principle was installed in the Institute's TRIGA-reactor and was tested for power measurements and automatic reactor control. This new method has some advantages over the conventional system using neutron detectors for power indication. For example, it is possible to mount the detector at some distance from the core with the result that the measurement is not so dependent on local flux variations due to irradiation samples in the core, changes of control rod positions and burn-up of fuel as if the neutron detector were mounted at the reflector. The detectors are free from neutron activation, radiation damage and sensitivity changes due to nuclear reactions in the detector material. Furthermore there are no insulation problems caused by irradiation of insulators. For the measurement of Cerenkov and gamma radiation conventional detectors were used. For fast power indication and automatic reactor control only the prompt fraction of Cerenkov and gamma radiation need be considered. For this purpose the delayed fraction was simulated by a simple electronic circuit and subtracted from the total detector current. To design the simulating circuit the transfer function of the Cerenkov and gamma radiation resulting from a step change of reactor power must be known. This function was obtained by an experimental method described in the paper. Current developments of the system and future applications for different types of reactors including high temperature types and also the design of detector probes are discussed. (author)

  16. Performance analysis of automatic generation control of interconnected power systems with delayed mode operation of area control error

    Directory of Open Access Journals (Sweden)

    Janardan Nanda

    2015-05-01

    Full Text Available This study presents automatic generation control (AGC of interconnected power systems comprising of two thermal and one hydro area having integral controllers. Emphasis is given to a delay in the area control error for the actuation of the supplementary controller and to examine its impact on the dynamic response against no delay which is usually the practice. Analysis is based on 50% loading condition in all the areas. The system performance is examined considering 1% step load perturbation. Results reveal that delayed mode operation provides a better system dynamic performance compared with that obtained without delay and has several distinct merits for the governor. The delay is linked with reduction in wear and tear of the secondary controller and hence increases the life of the governor. The controller gains are optimised by particle swarm optimisation. The performance of delayed mode operation of AGC at other loading conditions is also analysed. An attempt has also been made to find the impact of weights for different components in a cost function used to optimise the controller gains. A modified cost function having different weights for different components when used for controller gain optimisation improves the system performance.

  17. Wind power integration into the automatic generation control of power systems with large-scale wind power

    DEFF Research Database (Denmark)

    Basit, Abdul; Hansen, Anca Daniela; Altin, Müfit;

    2014-01-01

    Transmission system operators have an increased interest in the active participation of wind power plants (WPP) in the power balance control of power systems with large wind power penetration. The emphasis in this study is on the integration of WPPs into the automatic generation control (AGC) of...

  18. A computer program to automatically control the multi leaf collimator; Un programa informatico para el control automatico del colimador multilamina

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Galiano, P.; Crelgo Alonso, D.; Gonzalez Sancho, J. M.; Fernandez Garcia, J.; Vivanco Parellada, J.

    2012-07-01

    A computer program to automatically analyze strip test images for MLC leaf positioning quality assurance was developed and assessed. The program is fed with raw individual segment images in DICOM format supplied by the accelerator software and it automatically carries out all the steps in the leaf positioning quality control test (image merging, image analysis, storing and reporting). A comprehensive description of the software, that allows a relatively easy implementation, is shown. To check the performance of the program, a series of test fields with intentionally introduced errors were used. The obtained Measurement uncertainty of any individual leaf position was lower than 0.15 mm with gantry at 0 degree centigrade. At another gantry angles (90 degree centigrade, 180 degree centigrade and 270 degree centigrade) the dispersion of the measurements was larger, specially towards the external positions of the leafs, probably due to a slight rotation of the EPID caused by gravity. That reduces the useful area of the MLC to control when gantry angles different from 0 degree centigrade are used. In conclusion, this technique is fast enough to be carried out in a daily basis being also very precise and reliable. (Author)

  19. Modeling and Control for Managed Pressure Drilling from Floaters: Heave Compensation by Automatic Nonlinear Control

    OpenAIRE

    Landet, Ingar Skyberg

    2011-01-01

    Managed pressure drilling is a sophisticated pressure control method which is intended to meet increasingly high demands in drilling operations in the oil and gas industry. With this method, the well is pressurized and the drilling mud is released through a control choke which can be used to actively control/reject pressure variations. Such a control system needs to handle several disturbances, and in particular, vertical motion of the drill string causes severe pressure variations that need ...

  20. Head Tracking Based Avatar Control for Virtual Environment Teamwork Training

    Directory of Open Access Journals (Sweden)

    Stefan Marks

    2012-12-01

    Full Text Available Virtual environments (VE are gaining in popularity and are increasingly used for teamwork training purposes, e.g., for medical teams. One shortcoming of modern VEs is that nonverbal communication channels, essential for teamwork, are not supported well. We address this issue by using an inexpensive webcam to track the user's head. This tracking information is used to control the head movement of the user's avatar, thereby conveying head gestures and adding a nonverbal communication channel. We conducted a user study investigating the influence of head tracking based avatar control on the perceived realism of the VE and on the performance of a surgical teamwork training scenario. Our results show that head tracking positively influences the perceived realism of the VE and the communication, but has no major influence on the training outcome.

  1. Quantum governor: Automatic quantum control and reduction of the influence of noise without measuring

    International Nuclear Information System (INIS)

    The problem of automatically protecting a quantum system against noise in a closed circuit is analyzed. A general scheme is developed built from two steps. First, a distillation step is induced in which undesired components are removed to another degree of freedom of the system. Later a recovering step is employed in which the system gains back its initial density. An optimal-control method is used to generate the distilling operator. The scheme is demonstrated by a simulation of a two-level bit influenced by white noise. Undesired deviations from the target were shown to be reduced by at least two orders of magnitude on average. The relations between the quantum version of the classical Watt's governor and the field of quantum information are also discussed

  2. The Quantum Governor: Automatic quantum control and reduction of the influence of noise without measuring

    CERN Document Server

    Kallush, S

    2005-01-01

    The problem of automatically protecting a quantum system against noise in a closed circuit is analyzed. A general scheme is developed built from two steps. At first, a distillation step is induced in which undesired components are removed to another degree of freedom of the system. Later a recovering step is employed which the system gains back its initial density. An Optimal-Control method is used to generate the distilling operator. The scheme is demonstrated by a simulation of a two level byte influenced by white noise. Undesired deviations from the target were shown to be reduced by at least two orders of magnitude on average. The relations between the quantum version of the classical Watt's Governor and the field of quantum information are also discussed.

  3. Study of the WWR-K reactor automatic control rod materials microstructure

    International Nuclear Information System (INIS)

    The results of structure examination for the spent automatic control rod (ACR) material of the WWR-K reactor are presented. The rod was manufactured from both aluminium alloy SAV-1 and Cr18Ni10Ti austenitic stainless steel. The materials were irradiated by the thermal neutrons up to the dose 1.32·1021 neutron/cm2 at 70 deg.C temperature. Examination at the scanning electron microscope for the ACR components from aluminium alloy is showing the presence in their surface the cracks, forming a some grain structure with partial or full near-surface layer peeling. Transmission electron microscopy of these samples microstructure shows, that reactor irradiation leads to the material swelling (about 0.3%) in the result of the small vacancy pores formation with a high density

  4. Grey wolf optimizer based regulator design for automatic generation control of interconnected power system

    Directory of Open Access Journals (Sweden)

    Esha Gupta

    2016-12-01

    Full Text Available This paper presents an application of grey wolf optimizer (GWO in order to find the parameters of primary governor loop for successful Automatic Generation Control of two areas’ interconnected power system. Two standard objective functions, Integral Square Error and Integral Time Absolute Error (ITAE, have been employed to carry out this parameter estimation process. Eigenvalues along with dynamic response analysis reveals that criterion of ITAE yields better performance. The comparison of the regulator performance obtained from GWO is carried out with Genetic Algorithm (GA, Particle Swarm Optimization, and Gravitational Search Algorithm. Different types of perturbations and load changes are incorporated in order to establish the efficacy of the obtained design. It is observed that GWO outperforms all three optimization methods. The optimization performance of GWO is compared with other algorithms on the basis of standard deviations in the values of parameters and objective functions.

  5. Automatic fuzzy rule generation and its application to the navigation control for mobile robot

    International Nuclear Information System (INIS)

    This paper presents an approach to building multi-input and single output fuzzy models. Such a model is composed of fuzzy implications, and its output is inferred by simplified reasoning. The implications are automatically generated by the structure and parameter identification. In the structure identification, the optimal or near optimal number of fuzzy implications is determined in view of valid partition of data set. The parameters defining the implications are identified by a gradient method to minimize mean square errors. Numerical examples are provided to evaluate the feasibility of the proposed number of fuzzy implications than the ones achieved previously in other methods. The proposed approach has also been applied to construct a fuzzy model for the navigation control of a mobile robot. The validity of the resultant model is demonstrated by experimentation. (author)

  6. Slow Dynamics Model of Compressed Air Energy Storage and Battery Storage Technologies for Automatic Generation Control

    Energy Technology Data Exchange (ETDEWEB)

    Krishnan, Venkat; Das, Trishna

    2016-05-01

    Increasing variable generation penetration and the consequent increase in short-term variability makes energy storage technologies look attractive, especially in the ancillary market for providing frequency regulation services. This paper presents slow dynamics model for compressed air energy storage and battery storage technologies that can be used in automatic generation control studies to assess the system frequency response and quantify the benefits from storage technologies in providing regulation service. The paper also represents the slow dynamics model of the power system integrated with storage technologies in a complete state space form. The storage technologies have been integrated to the IEEE 24 bus system with single area, and a comparative study of various solution strategies including transmission enhancement and combustion turbine have been performed in terms of generation cycling and frequency response performance metrics.

  7. SIMULATING LOCAL DENSE AREAS USING PMMA TO ASSESS AUTOMATIC EXPOSURE CONTROL IN DIGITAL MAMMOGRAPHY.

    Science.gov (United States)

    Bouwman, R W; Binst, J; Dance, D R; Young, K C; Broeders, M J M; den Heeten, G J; Veldkamp, W J H; Bosmans, H; van Engen, R E

    2016-06-01

    Current digital mammography (DM) X-ray systems are equipped with advanced automatic exposure control (AEC) systems, which determine the exposure factors depending on breast composition. In the supplement of the European guidelines for quality assurance in breast cancer screening and diagnosis, a phantom-based test is included to evaluate the AEC response to local dense areas in terms of signal-to-noise ratio (SNR). This study evaluates the proposed test in terms of SNR and dose for four DM systems. The glandular fraction represented by the local dense area was assessed by analytic calculations. It was found that the proposed test simulates adipose to fully glandular breast compositions in attenuation. The doses associated with the phantoms were found to match well with the patient dose distribution. In conclusion, after some small adaptations, the test is valuable for the assessment of the AEC performance in terms of both SNR and dose. PMID:26977073

  8. Trainer Interventions as Instructional Strategies in Air Traffic Control Training

    Science.gov (United States)

    Koskela, Inka; Palukka, Hannele

    2011-01-01

    Purpose: This paper aims to identify methods of guidance and supervision used in air traffic control training. It also aims to show how these methods facilitate trainee participation in core work activities. Design/methodology/approach: The paper applies the tools of conversation analysis and ethnomethodology to explore the ways in which trainers…

  9. 77 FR 28285 - Positive Train Control Systems (RRR)

    Science.gov (United States)

    2012-05-14

    ... signal and train control systems. See 70 FR 11,052 (Mar. 7, 2005) (codified at 49 CFR part 236, subpart H... implementation on other lines. 75 FR 2598 (Jan. 15, 2010). Under RSIA, such PTC system implementation must be... to a new Sec. 236.1020. See 75 FR 59,108 (Sept. 27, 2010). Under this test, the railroad...

  10. METHODS OF AIR TRAFFIC CONTROLLERS ANTI-STRESS TRAINING

    OpenAIRE

    Kozhokhina, O. V.; Grishchenko, Y.V.

    2012-01-01

    Consider work features of air traffic controllers. The main negative factor in their work is stress. Proposed a combined method for determining the stress effect. It’s using anti-stress training on the software package "Anti-console" with noninvasive diagnostic blood parameters.

  11. Automatic PID Control Loops Design for Performance Improvement of Cryogenic Turboexpander

    International Nuclear Information System (INIS)

    Cryogenics field involves temperature below 123 K which is much less than ambient temperature. In addition, many industrially important physical processes—from fulfilling the needs of National Thermonuclear Fusion programs, superconducting magnets to treatment of cutting tools and preservation of blood cells, require extreme low temperature. The low temperature required for liquefaction of common gases can be obtained by several processes. Liquefaction is the process of cooling or refrigerating a gas to a temperature below its critical temperature so that liquid can be formed at some suitable pressure which is below the critical pressure. Helium liquefier is used for the liquefaction process of helium gas. In general, the Helium Refrigerator/Liquefier (HRL) needs turboexpander as expansion machine to produce cooling effect which is further used for the production of liquid helium. Turboexpanders, a high speed device that is supported on gas bearings, are the most critical component in many helium refrigeration systems. A very minor fault in the operation and manufacturing or impurities in the helium gas can destroy the turboexpander. However, since the performance of expanders is dependent on a number of operating parameters and the relations between them are quite complex, the instrumentation and control system design for turboexpander needs special attention. The inefficiency of manual control leads to the need of designing automatic control loops for turboexpander. Proper design and implementation of the control loops plays an important role in the successful operation of the cryogenic turboexpander. The PID control loops has to be implemented with accurate interlocks and logic to enhance the performance of the cryogenic turboexpander. For different normal and off-normal operations, speeds will be different and hence a proper control method for critical rotational speed avoidance is must. This paper presents the design of PID control loops needed for the

  12. Towards the implementation of e-manufacturing: design of an automatic tea drying control system

    Directory of Open Access Journals (Sweden)

    Mabvuu, Never

    2014-11-01

    Full Text Available Many of the production costs for producing tea are attributable to the process of drying the tea. E-manufacturing can assist companies to reduce these production costs by making crucial information available to decision-makers so that they can make informed decisions. This paper presents an application of e-manufacturing to the design of an automatic tea drying control system. This control system will ensure that the multiple drying parameters such as temperature, dryer-exit tea moisture content, and fuel consumption are maintained at optimal states during the course of the drying of tea. The additional aim of this system is to balance the cost of production and the quality of the final product. Using the Guggenheim-Anderson-De Boer (GAB model, the optimum drying temperature was found to be 100-110°C, while maintaining a dryer-exit tea moisture content of 3 to 3.12 per cent, at a drying rate of 3 per cent per minute. A Barix control application to control the system’s activities, using the web user interface (WUI, was also developed.

  13. To the question about the states of workability for automatic control systems with complicated structure

    Science.gov (United States)

    Kuznetsov, P. A.; Kovalev, I. V.; Losev, V. V.; Kalinin, A. O.; Murygin, A. V.

    2016-04-01

    The article discusses the reliability of automated control systems. Analyzes the approach to the classification systems for health States. This approach can be as traditional binary approach, operating with the concept of "serviceability", and other variants of estimation of the system state. This article provides one such option, providing selective evaluation of components for the reliability of the entire system. Introduced description of various automatic control systems and their elements from the point of view of health and risk, mathematical method of determining the transition object from state to state, they differ from each other in the implementation of the objective function. Explores the interplay of elements in different States, the aggregate state of the elements connected in series or in parallel. Are the tables of various logic States and the principles of their calculation in series and parallel connection. Through simulation the proposed approach is illustrated by finding the probability of getting into the system state data in parallel and serially connected elements, with their different probabilities of moving from state to state. In general, the materials of article will be useful for analyzing of the reliability the automated control systems and engineering of the highly-reliable systems. Thus, this mechanism to determine the State of the system provides more detailed information about it and allows a selective approach to the reliability of the system as a whole. Detailed results when assessing the reliability of the automated control systems allows the engineer to make an informed decision when designing means of improving reliability.

  14. Automatic Life Saving Device in Commercial Aircrafts using Feedback Control System

    Directory of Open Access Journals (Sweden)

    Tennyson Samuel John

    2011-11-01

    Full Text Available Several safety devices have filled in the vacuous spaces in commercial airplanes which once did not possess such sophisticated mechanisms. Commercial airplanes have copious amount of instruments and electrical circuits to provide a proper control system inside the plane. A noteworthy invention in the early 80’s is the oxygen masks provided for every passenger during a plane crash or if the airplane is subjected to climatic disturbances while travelling a passenger manually uses the oxygen masks. The oxygen control system in the airplanes has proved very effective in providing an overall safety to the passengers. But the technique given below is far more advanced than the present scenario. A person suffering from a breathing ailment is succumbed to variations in the carbon dioxide levels. Thereby this CO2 is measured and using a feedback control loop, quick actions can be taken in order to provide quick aid to the ailing patient. These are completely automatic and hence it is advanced than the manual oxygen control system presently used in all commercial aircrafts. At the end of the day saving a life is what a humanistic approach is all about.

  15. Video game training enhances cognitive control in older adults.

    Science.gov (United States)

    Anguera, J A; Boccanfuso, J; Rintoul, J L; Al-Hashimi, O; Faraji, F; Janowich, J; Kong, E; Larraburo, Y; Rolle, C; Johnston, E; Gazzaley, A

    2013-09-01

    Cognitive control is defined by a set of neural processes that allow us to interact with our complex environment in a goal-directed manner. Humans regularly challenge these control processes when attempting to simultaneously accomplish multiple goals (multitasking), generating interference as the result of fundamental information processing limitations. It is clear that multitasking behaviour has become ubiquitous in today's technologically dense world, and substantial evidence has accrued regarding multitasking difficulties and cognitive control deficits in our ageing population. Here we show that multitasking performance, as assessed with a custom-designed three-dimensional video game (NeuroRacer), exhibits a linear age-related decline from 20 to 79 years of age. By playing an adaptive version of NeuroRacer in multitasking training mode, older adults (60 to 85 years old) reduced multitasking costs compared to both an active control group and a no-contact control group, attaining levels beyond those achieved by untrained 20-year-old participants, with gains persisting for 6 months. Furthermore, age-related deficits in neural signatures of cognitive control, as measured with electroencephalography, were remediated by multitasking training (enhanced midline frontal theta power and frontal-posterior theta coherence). Critically, this training resulted in performance benefits that extended to untrained cognitive control abilities (enhanced sustained attention and working memory), with an increase in midline frontal theta power predicting the training-induced boost in sustained attention and preservation of multitasking improvement 6 months later. These findings highlight the robust plasticity of the prefrontal cognitive control system in the ageing brain, and provide the first evidence, to our knowledge, of how a custom-designed video game can be used to assess cognitive abilities across the lifespan, evaluate underlying neural mechanisms, and serve as a powerful tool

  16. Central automatic control or distributed occupant control for better indoor environment quality in the future

    DEFF Research Database (Denmark)

    Toftum, Jørn

    2008-01-01

    of adverse symptoms and building related symptoms than the ventilation mode per se. This result indicates that even though the development and application of new indoor environment sensors and HVAC control systems may allow for fully automated IEQ control, such systems should not compromise occupants...

  17. Central automatic control or distributed occupant control for better indoor environment quality in the future

    DEFF Research Database (Denmark)

    Toftum, Jørn

    2010-01-01

    control, as perceived by occupants, seemed more important for the prevalence of adverse symptoms and building-related symptoms than the ventilation mode per se. This result indicates that even though the development and application of new indoor environment sensors and HVAC control systems may allow for...

  18. Learning to control actions: transfer effects following a procedural cognitive control computerized training.

    Directory of Open Access Journals (Sweden)

    Nitzan Shahar

    Full Text Available Few studies have addressed action control training. In the current study, participants were trained over 19 days in an adaptive training task that demanded constant switching, maintenance and updating of novel action rules. Participants completed an executive functions battery before and after training that estimated processing speed, working memory updating, set-shifting, response inhibition and fluid intelligence. Participants in the training group showed greater improvement than a no-contact control group in processing speed, indicated by reduced reaction times in speeded classification tasks. No other systematic group differences were found across the different pre-post measurements. Ex-Gaussian fitting of the reaction-time distribution revealed that the reaction time reduction observed among trained participants was restricted to the right tail of the distribution, previously shown to be related to working memory. Furthermore, training effects were only found in classification tasks that required participants to maintain novel stimulus-response rules in mind, supporting the notion that the training improved working memory abilities. Training benefits were maintained in a 10-month follow-up, indicating relatively long-lasting effects. The authors conclude that training improved action-related working memory abilities.

  19. Optimization of the central automatic control of a small Dutch sewer system

    Science.gov (United States)

    Kolechkina, A. G.; Hoes, O. A. C.

    2012-04-01

    A sewer control system was developed in the context of a subsidized project aiming at improvement of surface water quality by control of sewer systems and surface water systems. The project was coordinated by the local water board, "Waterschap Hollandse Delta". Other participants were Delft University of Technology, Deltares and the municipalities Strijen, Cromstrijen, Westmaas, Oud Beijerland and Piershil. As part of the project there were two pilot implementations where a central automatic controller was coupled to the existing SCADA system. For these two pilots the system is now operational. A Dutch urban area in the western part of the Netherlands is usually part of a polder, which is effectively an artificially drained catchment. The urban area itself is split into small subcatchments that manage runoff in different ways. In all cases a large fraction goes into the natural hydrological cycle, but, depending on the design of the local sewer system, a larger or smaller part finds its way into the sewer system. Proper control of this flow is necessary to control surface water quality and to avoid health risks from flow from the sewer into the streets. At each time step the controller switches pumps to distribute the remaining water in the system at the end of the time step over the different subcatchments. The distribution is created based on expert judgment of the relative vulnerability and subcatchment sewer system water quality. It is implemented in terms curves of total system stored volume versus subcatchment stored volume. We describe the process of the adaptation of a controller to two different sewer systems and the understanding of the artificial part of the catchment we gained during this process. In the process of adaptation the type of sewer system (combined foul water and storm water transport or separate foul water and storm water transport) played a major role.

  20. Development and implementation of full-automatic supervision and control programme for CEFR refueling control system

    International Nuclear Information System (INIS)

    In order to make the process of CEFR refueling more convenient and reliable, the computer supervision and control system was designed according to the CEFR refueling technology. Meanwhile, the supervision and control function and database function were developed on the basis of KingView and SQL Server2000. The fuel of reactor core was fully loaded by the system, and full-automation of CEFR refueling process was implemented. (authors)

  1. 11th International Federation of Automatic Control (IFAC) Workshop on Time-Delay Systems

    CERN Document Server

    Fridman, Emilia; Sename, Olivier; Dugard, Luc

    2016-01-01

    This book mostly results from a selection of papers presented during the 11th IFAC (International Federation of Automatic Control) Workshop on Time-Delay Systems, which took place in Grenoble, France, February 4 - 6, 2013.  During this event, 37 papers were presented. Taking into account the reviewers' evaluation and the papers' presentation the best papers have been selected and collected into the present volume. The authors of 13 selected papers were invited to participate to this book and provided a more detailed and improved version of the conference paper. To enrich the book, three more chapters have been included from specialists on time-delay systems who presented their work during the 52nd IEEE Conference on Decision and Control, which held in December 10 - 13, 2013, at Florence, Italy. The content of the book is divided into four main parts as follows: Modeling, Stability analysis, Stabilization and control, and Input-delay systems. Focusing on various topics of time-delay systems, this book will be...

  2. Train Control System Formalization Modeling oriented Movement Authority

    Directory of Open Access Journals (Sweden)

    Xiaoming Wang

    2012-09-01

    Full Text Available Chinese Train Control System-3(CTCS-3 was integrated via various control system devices, assurance of CTCS-3 system transmission probability relied on empirical judgment, it is necessary to form its formalization to support integration for system stability of the whole CTCS-3. Movement Authority(MA acts on the whole information process of CTCS-3 to control train, its process properties can be as the reflection of CTCS probability. Aiming at that,  paper selected MA as the objective, proposed MA-oriented CTCS-3 formalization modeling. Paper designed generation and transmission algorithms of MA, formed MA computation models for application functions. Based on computation models, paper constructed MA hierarchical Colored Petri Nets(CPN models, and completed MA timed CPN model, the report and experimental result demonstrate that the model proposed is effective and can reflect CTCS-3 system properties accurately. 

  3. Struggling doctors in specialist training: a case control study

    DEFF Research Database (Denmark)

    O'Neill, Lotte; Norberg, Karen; Thomsen, Maria;

    seemed to predict struggling in postgraduate education if any. The study design is rooted in epidemiological methodology. Struggling doctors in specialist training: a case-control study. It has been reported in the international literature, that around 3-10% of doctors in post-garduate specialist...... training are struggling to comply with educational requirements.1-3 A struggling doctor risks being a liability to patients health care. In the medical education literature, early identification and support of strugglers has been proposed as an important investment in the development and training of future...... relationships between medical student behaviours and performances and subsequent professional misconduct or disciplinary action with the same study design and found positive associations.4,7 Our results (positive or negative) is of importance in the general discussion of the transition and handing-over of...

  4. Influence of gymnastics training on the development of postural control.

    Science.gov (United States)

    Garcia, Claudia; Barela, José Angelo; Viana, André Rocha; Barela, Ana Maria Forti

    2011-03-29

    This study investigated the influence of gymnastics training on the postural control of children with and without the use of visual information. Two age groups, aged 5-7 and 9-11 years old, of gymnasts and nongymnasts were asked to maintain an upright and quiet stance on a force platform with eyes open (EO) and eyes closed (EC) for 30s. Area of the stabilogram (AOS) and mean velocity of the center of pressure (COP) in anterior-posterior (AP) and medial-lateral (ML) directions were calculated and used to investigate the effects of gymnastics training, age, and visual information. Younger gymnasts presented greater postural control compared to younger nongymnasts while visual information did not improve postural control in younger nongymnasts. Younger gymnasts displayed improved postural control with EO compared to EC. The mean velocity of the COP in the ML direction was: less for younger gymnasts than younger nongymnasts with EO. These results suggest that gymnastics training promotes improvements in postural control of younger children only, which results from their use of visual information when available. PMID:21276829

  5. Knowledge-based full-automatic control system for a nuclear ship reactor

    Energy Technology Data Exchange (ETDEWEB)

    Shimazaki, J.; Nakazawa, T.; Yabuuchi, N. [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)

    2000-03-01

    Plant operations aboard nuclear ships require quick judgements and actions due to changing marine conditions such as wind, waves and currents. Furthermore, additional human support is not available for nuclear ship operation at sea, so advanced automatic operations are necessary to reduce the number of operators required finally. Therefore, an advanced automatic operating system has been developed based on operational knowledge of nuclear ship 'Mutsu' plant. The advanced automatic operating system includes both the automatic operation system and the operator-support system which assists operators in completing actions during plant accidents, anomaly diagnosis and plant supervision. These system are largely being developed using artificial intelligent techniques such as neural network, fuzzy logic and knowledge-based expert. The automatic operation system is fundamentally based upon application of an operator's knowledge of both normal (start-up to rated power level) and abnormal (after scram) operations. Comparing plant behaviors from start-up to power level by the automatic operation with by 'Mutsu' manual operation, stable automatic operation was obtained almost same as manual operation within all operating limits. The abnormal automatic system was for hard work of manual operations after scram or LOCA accidents. An integrating system with the normal and the abnormal automatic systems are being developed for interacting smoothly both systems. (author)

  6. Knowledge-based full-automatic control system for a nuclear ship reactor

    International Nuclear Information System (INIS)

    Plant operations aboard nuclear ships require quick judgements and actions due to changing marine conditions such as wind, waves and currents. Furthermore, additional human support is not available for nuclear ship operation at sea, so advanced automatic operations are necessary to reduce the number of operators required finally. Therefore, an advanced automatic operating system has been developed based on operational knowledge of nuclear ship 'Mutsu' plant. The advanced automatic operating system includes both the automatic operation system and the operator-support system which assists operators in completing actions during plant accidents, anomaly diagnosis and plant supervision. These system are largely being developed using artificial intelligent techniques such as neural network, fuzzy logic and knowledge-based expert. The automatic operation system is fundamentally based upon application of an operator's knowledge of both normal (start-up to rated power level) and abnormal (after scram) operations. Comparing plant behaviors from start-up to power level by the automatic operation with by 'Mutsu' manual operation, stable automatic operation was obtained almost same as manual operation within all operating limits. The abnormal automatic system was for hard work of manual operations after scram or LOCA accidents. An integrating system with the normal and the abnormal automatic systems are being developed for interacting smoothly both systems. (author)

  7. Comparison of group motor control training versus individual training for people suffering from back pain.

    Science.gov (United States)

    Streicher, Heike; Mätzold, Franz; Hamilton, Christine; Wagner, Petra

    2014-07-01

    This study investigated the effects of "motor-control training" (MCT) using the model of deficits in the activation of transversus abdominis (TrA) in people with recurrent back pain. The purpose of this investigation was to establish whether MCT - implemented within a new group intervention (experimental group) - is able to produce results similar to those of a conventional intervention applied individually (control group) to people suffering from back pain. Using the form of an experimental pre-post-test design, the study consisted of an experimental group (N = 18, mean age M = 45.2; SD = 18.4; 9 ♂, 9 ♀) and a comparison group (N = 13; age = 56.6; SD = 18.5; 6 ♂, 7 ♀). The training covered a period of six weeks, with two training sessions per week. The amount of training was the same in both groups. Aside from the same extent of training, the participants in the experimental group completed training content in the group interventions identical to that completed by the comparison group in the individual treatments. To clarify: The difference between the two groups was that the participants in the individual-therapy control group received individual feedback on their exercise performance and correction notes from the instructor. This degree of individual attention was not given within the group therapy. The selective activation of the M. transversus abdominis (TrA) was the main focus of the intervention, with the intent of improving its stabilising corset function, especially within the lumbar region, via increased tension of the thoracolumbar fascia. To record the progress of both groups, the anterolateral abdominal muscle recruitment of the M. transversus abdominis (TrA) was measured as a main influencing factor for anterolateral stabilisation of the spine. For measurements of muscle recruitment, rehabilitative ultrasound imaging (M-Turbo™ SonoSite(®) Erlangen in B-Mode) according to Whittaker (2007) was used. Furthermore, the relationship between pain

  8. A cable-driven wrist robotic rehabilitator using a novel torque-field controller for human motion training

    Science.gov (United States)

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

    2015-06-01

    Rehabilitation technologies have great potentials in assisted motion training for stroke patients. Considering that wrist motion plays an important role in arm dexterous manipulation of activities of daily living, this paper focuses on developing a cable-driven wrist robotic rehabilitator (CDWRR) for motion training or assistance to subjects with motor disabilities. The CDWRR utilizes the wrist skeletal joints and arm segments as the supporting structure and takes advantage of cable-driven parallel design to build the system, which brings the properties of flexibility, low-cost, and low-weight. The controller of the CDWRR is designed typically based on a virtual torque-field, which is to plan "assist-as-needed" torques for the spherical motion of wrist responding to the orientation deviation in wrist motion training. The torque-field controller can be customized to different levels of rehabilitation training requirements by tuning the field parameters. Additionally, a rapidly convergent parameter self-identification algorithm is developed to obtain the uncertain parameters automatically for the floating wearable structure of the CDWRR. Finally, experiments on a healthy subject are carried out to demonstrate the performance of the controller and the feasibility of the CDWRR on wrist motion training or assistance.

  9. Modelling and automatic reactive power control of isolated wind-diesel hybrid power systems using ANN

    International Nuclear Information System (INIS)

    This paper presents an artificial neural network (ANN) based approach to tune the parameters of the static var compensator (SVC) reactive power controller over a wide range of typical load model parameters. The gains of PI (proportional integral) based SVC are optimised for typical values of the load voltage characteristics (nq) by conventional techniques. Using the generated data, the method of multi-layer feed forward ANN with error back propagation training is employed to tune the parameters of the SVC. An ANN tuned SVC controller has been applied to control the reactive power of a variable slip/speed isolated wind-diesel hybrid power system. It is observed that the maximum deviations of all parameters are more for larger values of nq. It has been shown that initially synchronous generator supplies the reactive power required by the induction generator and/or load, and the latter reactive power is purely supplied by the SVC

  10. Automatic Turnout Control System Based on Time Game Automata%基于时间博弈自动机的道岔自动控制系统

    Institute of Scientific and Technical Information of China (English)

    余兴超; 董荣胜; 孙栋栋; 邵梅

    2012-01-01

    为提高道岔自动控制系统的运行效率,引入时间博弈自动机理论,建立列车、控制器、道岔和故障检测器的时间博弈自动机网络模型,使用TCTL公式描述获胜条件,应用策略综合工具Uppaal-Tiga输出获胜策略并生成控制代码.仿真结果表明,该控制策略可以有效提高列车的行车效率.%In order to enhance the efficiency of automatic turnout control system, this paper introduces the theory of time game automata, builds the networks of time games automata models of train, controller, turnout, fault detector, gives the winning condition specified by TCTL formula, outputs the winning strategy synthesized by tool Uppaal-Tiga and generates the control code. Simulation results indicate that the control strategy enhances the efficiency of trains.

  11. Extending Brain-Training to the Affective Domain: Increasing Cognitive and Affective Executive Control through Emotional Working Memory Training

    OpenAIRE

    Schweizer, Susanne; Hampshire, Adam; Dalgleish, Tim

    2011-01-01

    So-called ‘brain-training’ programs are a huge commercial success. However, empirical evidence regarding their effectiveness and generalizability remains equivocal. This study investigated whether brain-training (working memory [WM] training) improves cognitive functions beyond the training task (transfer effects), especially regarding the control of emotional material since it constitutes much of the information we process daily. Forty-five participants received WM training using either emot...

  12. Diminished Baroreflex Control of Forearm Vascular Resistance Following Training

    Science.gov (United States)

    Mack, G. W.; Thompson, C. A.; Doerr, D. F.; Nadel, E. R.; Convertino, V. A.

    1991-01-01

    The stimulus-response characteristics of cardiopulmonary baroreflex control of forearm vascular resistance (FVR units in mm Hg x min x I00 ml/ml) were studied in 14 volunteers before and after 10 wk of endurance training. We assessed the relationship betaleen reflex stimulus (changes in central venous pressure, CVP) and response (FVR) during unloading of cardiopulmonary baroreceptors with lower body negative pressure (LBNP, 0 to - 2O mm Hg). Changes in CVP during LBNP were estimated from pressure changes in a large peripheral vein in the dependent arm of the subject in the right lateral decubitus position. Maximal oxygen uptake (VO(sub 2max)) and total blood volume increased with endurance training from 37.8 +/- 1.4 ml/min x kg and 63.6 +/- 2.1 ml/kg to 45.3 +/- 1.4 ml/ min x kg and 69.3 +/- 2.8 ml/kg respectively (P less than 0.05). Reflex forearm vasoconstriction occurred in response to a reduction in estimated CVP, and the absolute change in FVR per unit of CVP was reduced from -5.96 +/- 0.79 to -4.06 +/- 0.52 units x mm/ Hg (P less than 0.05) following exercise training but was unchanged from -6.10 to 0.57 to -6.22 +/- 0.94 units x mm/ Hg for the time control group (N = 7). Resting values for FVR were similar before and after exercise training; however, resting estimated CVP was elevated from 9.5 +/- 0.5 mm x Hg before training to 11.3 +/- 0.6 mm x Hg after training. The reduction in sensitivity of the cardiopulmonary baroreflex control of FVR was linearly related to the increase in blood volume (r = 0.65, P less than 0.05). suggesting that diminished cardiopulmonary baroreflex control of FVR in physically fit individuals is related, in part, to a training-induced blood volume expansion.

  13. Stochastic optimal control of single neuron spike trains

    DEFF Research Database (Denmark)

    Iolov, Alexandre; Ditlevsen, Susanne; Longtin, Andrë

    2014-01-01

    stimulation of a neuron to achieve a target spike train under the physiological constraint to not damage tissue. Approach. We pose a stochastic optimal control problem to precisely specify the spike times in a leaky integrate-and-fire (LIF) model of a neuron with noise assumed to be of intrinsic or synaptic...... firing patterns can be controlled in vivo.......Objective. External control of spike times in single neurons can reveal important information about a neuron's sub-threshold dynamics that lead to spiking, and has the potential to improve brain–machine interfaces and neural prostheses. The goal of this paper is the design of optimal electrical...

  14. Microcomputer-based systems for automatic control of sample irradiation and chemical analysis of short-lived isotopes

    International Nuclear Information System (INIS)

    Two systems resulted from the need for the study of the nuclear decay of short-lived radionuclides. Automation was required for better repeatability, speed of chemical separation after irradiation and for protection from the high radiation fields of the samples. A MCS-8 computer was used as the nucleus of the automatic sample irradiation system because the control system required an extensive multiple-sequential circuit. This approach reduced the sequential problem to a computer program. The automatic chemistry control system is a mixture of a fixed and a computer-based programmable control system. The fixed control receives the irradiated liquid sample from the reactor, extracts the liquid and disposes of the used sample container. The programmable control executes the chemistry program that the user has entered through the teletype. (U.S.)

  15. Comparative evaluation of the effectiveness of manual and automatic control deflection vector airship to take off stage

    OpenAIRE

    В.П. Гусинін; Гусинін, А.В.; О.М. Тачиніна

    2008-01-01

     In paper, results of the comparative effectiveness evaluation of the manual and automatic thrust vector control of airship in the class of «Zeppelin NT» at the takeoff are shown. The gust influences on the airship characteristics and the process of airship takeoff with one out of service engine are considered.

  16. KIT/KPS of Qinshan phase-II and a discussion on integrated information management and automatic control

    International Nuclear Information System (INIS)

    Centralized Data Processing and Safety Panel (KIT/KPS) of Qinshan Phase-II power project is described, and the necessity and engineering scheme is presented of integrated information management and automatic control that would achieve in power plant according to the technology scheme and technology trait of KIT/KPS

  17. Lower limb control and mobility following exercise training

    OpenAIRE

    Kim Sukwon; Lockhart Thurmon

    2012-01-01

    Abstract The objective of the present study was to evaluate the effects of 8-week balance or weight training on ankle joint stiffness and limb stability for older adults, furthermore, on outcomes of slips while walking. Eighteen older adults volunteered for the study and randomly were assigned to the three groups, such as, weight, balance, or control group. While walking on a walking track, three-dimensional posture data were sampled and ankle joint stiffness and limb stability were computed ...

  18. Formal verification of safety protocol in train control system

    OpenAIRE

    Zhang, Yan; TANG, TAO; Li, Keping; Mera Sanchez de Pedro, Jose Manuel; Zhu, Li; Zhao, Lin; Xu, Tianhua

    2011-01-01

    In order to satisfy the safety-critical requirements, the train control system (TCS) often employs a layered safety communication protocol to provide reliable services. However, both description and verification of the safety protocols may be formidable due to the system complexity. In this paper, interface automata (IA) are used to describe the safety service interface behaviors of safety communication protocol. A formal verification method is proposed to describe the safety communication pr...

  19. Controlled trial of supervised exercise training in chronic bronchitis.

    OpenAIRE

    D. J. Sinclair; Ingram, C G

    1980-01-01

    In a controlled trial of exercise retraining in patients with severe chronic bronchitis, 33 subjects were followed for a mean period of 10.3 months. The exercise programme was supervised once a week, and daily training comprised a 12-minute walk and simple stair climbing exercises. The subjects in the exercise group showed a highly significant improvement in their walking distance, attaining a maximum increase of 24% after eight to 12 months. There was also considerable subjective improvement...

  20. Online Verification of Control Parameter Calculations in Communication Based Train Control System

    CERN Document Server

    Bu, Lei; Wang, Linzhang; Li, Xuandong

    2011-01-01

    Communication Based Train Control (CBTC) system is the state-of-the-art train control system. In a CBTC system, to guarantee the safety of train operation, trains communicate with each other intensively and adjust their control modes autonomously by computing critical control parameters, e.g. velocity range, according to the information they get. As the correctness of the control parameters generated are critical to the safety of the system, a method to verify these parameters is a strong desire in the area of train control system. In this paper, we present our ideas of how to model and verify the control parameter calculations in a CBTC system efficiently. - As the behavior of the system is highly nondeterministic, it is difficult to build and verify the complete behavior space model of the system online in advance. Thus, we propose to model the system according to the ongoing behavior model induced by the control parameters. - As the parameters are generated online and updated very quickly, the verification...

  1. Purpose and benefit of control system training for operators

    International Nuclear Information System (INIS)

    The complexity of accelerators is ever increasing and today it is typical that a large number of feedback loops are implemented, based on sophisticated models which describe the underlying physics. Despite this increased complexity the machine operators must still effectively monitor and supervise the desired behavior of the accelerator. This is not alone sufficient; additionally, the correct operation of the control system must also be verified. This is not always easy since the structure, design, and performance of the control system is usually not visualized and is often hidden to the operator. To better deal with this situation operators need some knowledge of the control system in order to react properly in the case of problems. In fact operators need mental models of the control system to recognize fault states and react appropriate to errors and misbehavior of both, the accelerator and the control system itself. Mental models gained only on infrequent experience can be imprecise or plain wrong in worst case. Control system training can provide a foundation to build better mental models and therefore help to enhance operator responses and machine availability. For a refinement of the mental model repeated experience is needed. This can be provided by training sessions at the real accelerator

  2. How Life Experience Shapes Cognitive Control Strategies: The Case of Air Traffic Control Training

    OpenAIRE

    Arbula, Sandra; Capizzi, Mariagrazia; Lombardo, Nicoletta; Vallesi, Antonino

    2016-01-01

    Although human flexible behavior relies on cognitive control, it would be implausible to assume that there is only one, general mode of cognitive control strategy adopted by all individuals. For instance, different reliance on proactive versus reactive control strategies could explain inter-individual variability. In particular, specific life experiences, like a highly demanding training for future Air Traffic Controllers (ATCs), could modulate cognitive control functions. A group of ATC trai...

  3. Modeling and simulation of the generation automatic control of electric power systems; Modelado y simulacion del control automatico de generacion de sistemas electricos de potencia

    Energy Technology Data Exchange (ETDEWEB)

    Caballero Ortiz, Ezequiel

    2002-12-01

    This work is devoted to the analysis of the Automatic Control of Electrical Systems Generation of power, as of the information that generates the loop with Load-Frequency Control and the Automatic Voltage Regulator loop. To accomplish the analysis, the control classical theory and feedback control systems concepts are applied. Thus also, the modern theory concepts are employed. The studies are accomplished in the digital computer through the MATLAB program and the available simulation technique in the SIMULINK tool. In this thesis the theoretical and physical concepts of the automatic control of generation are established; dividing it in load frequency control and automatic voltage regulator loops. The mathematical models of the two control loops are established. Later, the models of the elements are interconnected in order to integrate the loop with load frequency control and the digital simulation of the system is carried out. In first instance, the function of the primary control in are - machine, area - multi machine and multi area - multi machine power systems, is analyzed. Then, the automatic control of generation of the area and multi area power systems is studied. The economic dispatch concept is established and with this plan the power system multi area is simulated, there in after the energy exchange among areas in stationary stage is studied. The mathematical models of the component elements of the control loop of the automatic voltage regulator are interconnected. Data according to the nature of each component are generated and their behavior is simulated to analyze the system response. The two control loops are interconnected and a simulation is carry out with data generated previously, examining the performance of the automatic control of generation and the interaction between the two control loops. Finally, the Poles Positioning and the Optimum Control techniques of the modern control theory are applied to the automatic control of an area generation

  4. Quality assurance of automatic exposure control devices for digital radiography: Belgian approach

    International Nuclear Information System (INIS)

    Since 2001, an annual quality control of medical X-ray equipment by a medical physics expert (MPE) is obligatory in Belgium. The minimal standards that a system should achieve are defined in the RP91 document. After some years of experience, there was a consensus that the MPE activities would benefit from a more explicit text that would take full account of the challenges of the on-going digitization. A working group of Belgian physicists was formed within the Belgian Hospital Physicists Association to create a more extended and detailed protocol, to harmonize the test procedures among the physicists and to test digital detectors appropriately. The aim of the group was to make sure that image quality and patient dose are well balanced and that the automatic exposure controller functions well for all conditions of beam quality and patient thickness. The most important chapter of the new Belgian protocol concerns the testing of the AEC for digital radiography detectors (DR) and computed radiography plates (CR). These tests are not described in the RP91. Conventional X-ray systems using film radiography have to give similar optical densities. On digital systems, the optical density is fixed by the processing and not at all related to exposure. The approaches to test film-screen can therefore not be applied to digital detectors. The hypothesis of the test procedure is the following: as the image quality of a digital detector is not contrast limited but dose limited, it is the amount of noise in the image which limits the image quality. Therefore, the goal of the AEC calibration should be to keep the SNR constant at all thicknesses and beam qualities. As described by Doyle and Martin, we aim to control the SNR by measuring the exposure indication (EI) or pixel value (PV) of the detector. We report on a practical approach, that has been developed in our team

  5. Brief Emotion Regulation Training Facilitates Arousal Control During Sexual Stimuli.

    Science.gov (United States)

    van Overveld, Mark; Borg, Charmaine

    2015-01-01

    Disgust, a negative emotion which evokes strong behavioral avoidance tendencies, has been associated with sexual dysfunction. Recently, it was postulated that healthy sexual functioning requires a balance between excitatory (increased sexual arousal) and inhibitory processes (lowered disgust levels). This suggests that amplification of excitatory processes (like sexual arousal) could be a valuable addition to treatments for affect-based sexual dysfunctions. The major aim of the present study was to establish whether up-regulation could effectively enhance arousal levels during sexual stimuli, and whether such a training would simultaneously reduce disgust. Students (N = 163, mean age = 20.73 years, SD = 2.35) were trained in up-regulation of affect using either a sexual arousal film (i.e., female-friendly erotic movie) or a threat arousal film clip (i.e., horror movie), while control groups viewed the films without training instructions. Following this, participants viewed and rated state emotions during a series of pictures (sexual, disgusting, or neutral). Up-regulation of mood successfully enhanced general arousal in both groups, yet these arousal levels were not paralleled by reductions in disgust. Overall, the findings indicate that emotion regulation training by maximizing positive affect and general arousal could be an effective instrument to facilitate affect-related disturbances in sexual dysfunctions. PMID:25258109

  6. Evaluation of the use of automatic exposure control and automatic tube potential selection in low-dose cerebrospinal fluid shunt head CT

    Energy Technology Data Exchange (ETDEWEB)

    Wallace, Adam N.; Bagade, Swapnil; Chatterjee, Arindam; Hicks, Brandon; McKinstry, Robert C. [Barnes Jewish Hospital, Mallinckrodt Institute of Radiology, St. Louis, MO (United States); Washington University School of Medicine, St. Louis, MO (United States); Vyhmeister, Ross [Washington University School of Medicine, St. Louis, MO (United States); Ramirez-Giraldo, Juan Carlos [Siemens Healthcare, Malvern, PA (United States)

    2015-03-17

    Cerebrospinal fluid shunts are primarily used for the treatment of hydrocephalus. Shunt complications may necessitate multiple non-contrast head CT scans resulting in potentially high levels of radiation dose starting at an early age. A new head CT protocol using automatic exposure control and automated tube potential selection has been implemented at our institution to reduce radiation exposure. The purpose of this study was to evaluate the reduction in radiation dose achieved by this protocol compared with a protocol with fixed parameters. A retrospective sample of 60 non-contrast head CT scans assessing for cerebrospinal fluid shunt malfunction was identified, 30 of which were performed with each protocol. The radiation doses of the two protocols were compared using the volume CT dose index and dose length product. The diagnostic acceptability and quality of each scan were evaluated by three independent readers. The new protocol lowered the average volume CT dose index from 15.2 to 9.2 mGy representing a 39 % reduction (P < 0.01; 95 % CI 35-44 %) and lowered the dose length product from 259.5 to 151.2 mGy/cm representing a 42 % reduction (P < 0.01; 95 % CI 34-50 %). The new protocol produced diagnostically acceptable scans with comparable image quality to the fixed parameter protocol. A pediatric shunt non-contrast head CT protocol using automatic exposure control and automated tube potential selection reduced patient radiation dose compared with a fixed parameter protocol while producing diagnostic images of comparable quality. (orig.)

  7. High-speed, automatic controller design considerations for integrating array processor, multi-microprocessor, and host computer system architectures

    Science.gov (United States)

    Jacklin, S. A.; Leyland, J. A.; Warmbrodt, W.

    1985-01-01

    Modern control systems must typically perform real-time identification and control, as well as coordinate a host of other activities related to user interaction, online graphics, and file management. This paper discusses five global design considerations which are useful to integrate array processor, multimicroprocessor, and host computer system architectures into versatile, high-speed controllers. Such controllers are capable of very high control throughput, and can maintain constant interaction with the nonreal-time or user environment. As an application example, the architecture of a high-speed, closed-loop controller used to actively control helicopter vibration is briefly discussed. Although this system has been designed for use as the controller for real-time rotorcraft dynamics and control studies in a wind tunnel environment, the controller architecture can generally be applied to a wide range of automatic control applications.

  8. Study of transient connected with WWER-1000 cluster drop with subsequent working of automatic power controller

    International Nuclear Information System (INIS)

    Results of calculation study of transient connected with drop of WWER-1000 cluster of working group are presented. Transient was considered in the mode of automatic power control without forming of warning protection signal due to reaching of dropped cluster of core bottom. Calculations are shown that given transient can cause valuable distortion of power distribution in axial direction. At that main increase of pin power is occurred in upper part of the core, whereas power in lower part is almost not changed. The additional increase of power in the upper part of core makes conditions for initiation of DNB. This effect can be observed if in initial state axial power distribution is displaced in upper part of core nearby to rest of supported power clusters of working group. It is necessary to define conservatively with taking into account assumed working group efficiency-in which row from extracted clusters of working group the displacement of axial power in the upper part is possible. Probability of such displacement and its localization in plane of core must be properly analyzed. The work was performed in framework of orders BMU SR 2511 and BMU R0801504 (SR2611). The report describes the opinion and view of the contractor-State Scientific and Technical Centre on Nuclear and Radiation Safety-and does not necessarily represent the opinion of the ordering party - BMU-BfS/GRS and TUEV SUED. (Authors)

  9. Controlling and Reducing of Speed for Vehicles Automatically By Using Rf Technology.

    Directory of Open Access Journals (Sweden)

    Y. Ravindra Babu,

    2014-11-01

    Full Text Available For vehicle safety and safety for passengers in vehicle is an important parameter. Most of the vehicles get accident because no proper safety measures are taken especially at curves and hair pin bends humps and any obstacles in front of the vehicle. This system can be used for the prevention of such a problem by indicating a pre indication and also reducing the speed of vehicles by reducing the fuel rate of vehicle. As the action is in terms of fuel rate so the vehicle automatically goes to control and avoids the accidents. At curves and hair pin bends the line of sight is not possible for the drivers so the special kind of transmitter which is tuned at a frequency of 433MHZ are mounted as these transmitters continuously radiate a RF signal for some particular area. As the vehicle come within this radiation the receiver in the vehicle gets activate. The transmitter used here is a coded transmitter which is encoded with encoder. The encoder provides a 4 bit binary data which is serially transmitted to transmitter. The transmitter used here is ASK type (amplitude shift keying which emits the RF radiation.

  10. Performance Evaluation of Antlion Optimizer Based Regulator in Automatic Generation Control of Interconnected Power System

    Directory of Open Access Journals (Sweden)

    Esha Gupta

    2016-01-01

    Full Text Available This paper presents an application of the recently introduced Antlion Optimizer (ALO to find the parameters of primary governor loop of thermal generators for successful Automatic Generation Control (AGC of two-area interconnected power system. Two standard objective functions, Integral Square Error (ISE and Integral Time Absolute Error (ITAE, have been employed to carry out this parameter estimation process. The problem is transformed in optimization problem to obtain integral gains, speed regulation, and frequency sensitivity coefficient for both areas. The comparison of the regulator performance obtained from ALO is carried out with Genetic Algorithm (GA, Particle Swarm Optimization (PSO, and Gravitational Search Algorithm (GSA based regulators. Different types of perturbations and load changes are incorporated to establish the efficacy of the obtained design. It is observed that ALO outperforms all three optimization methods for this real problem. The optimization performance of ALO is compared with other algorithms on the basis of standard deviations in the values of parameters and objective functions.

  11. Automatic generation of predictive dynamic models reveals nuclear phosphorylation as the key Msn2 control mechanism.

    Science.gov (United States)

    Sunnåker, Mikael; Zamora-Sillero, Elias; Dechant, Reinhard; Ludwig, Christina; Busetto, Alberto Giovanni; Wagner, Andreas; Stelling, Joerg

    2013-05-28

    Predictive dynamical models are critical for the analysis of complex biological systems. However, methods to systematically develop and discriminate among systems biology models are still lacking. We describe a computational method that incorporates all hypothetical mechanisms about the architecture of a biological system into a single model and automatically generates a set of simpler models compatible with observational data. As a proof of principle, we analyzed the dynamic control of the transcription factor Msn2 in Saccharomyces cerevisiae, specifically the short-term mechanisms mediating the cells' recovery after release from starvation stress. Our method determined that 12 of 192 possible models were compatible with available Msn2 localization data. Iterations between model predictions and rationally designed phosphoproteomics and imaging experiments identified a single-circuit topology with a relative probability of 99% among the 192 models. Model analysis revealed that the coupling of dynamic phenomena in Msn2 phosphorylation and transport could lead to efficient stress response signaling by establishing a rate-of-change sensor. Similar principles could apply to mammalian stress response pathways. Systematic construction of dynamic models may yield detailed insight into nonobvious molecular mechanisms. PMID:23716718

  12. An automatic controlled field size of a γ-ray irradiation system

    International Nuclear Information System (INIS)

    We constructed a γ-ray irradiation system with a commercial irradiation instrument, Sangyo Kagaku Co. Ltd., Model SK-951. The system is composed of an irradiator mounted with 60Co (3.7 GBq) and 137Cs (11.1 GBq and 111 GBq), and a mobile exposure deck having a lead shield sandwiched with iron (1200 mm(W) x 1200 mm(H) x 50 mm(D)) at back side. This shield provides low exposure rate at wall, floor and ceiling in the present room. To limit irradiation field size within dimension of the shield, three kinds of square collimator (6.03deg, 9.27deg and 20.02deg) were equipped around the irradiator beam exit. The selection of collimators is automatically controlled. The abilities of shield and collimator were evaluated by calculation and measurement of exposure rate at points on the wall. By these improvements, exposure rate was lowered to the dose-equivalent limit in law. (author)

  13. Evaluation of impedance on biological Tissues using automatic control measurement system

    Energy Technology Data Exchange (ETDEWEB)

    Kil, Sang Hyeong; Shin, Dong Hoon; Lee, Seong Mo [Pusan National University, Yangsan (Korea, Republic of); Lee, Moo Seok; Kim, Sang Sik [Pusan National University, Busan (Korea, Republic of); Kim, Gun FDo; Lee, Jong Kyu [Pukyung National University, Busan (Korea, Republic of)

    2015-08-15

    Each biological tissue has endemic electrical characteristics owing to various differences such as those in cellular arrangement or organization form. The endemic electrical characteristics change when any biological change occurs. This work is a preliminary study surveying the changes in the electrical characteristics of biological tissue caused by radiation exposure. For protection against radiation hazards, therefore the electrical characteristics of living tissue were evaluated after development of the automatic control measurement system using LabVIEW. No alteration of biological tissues was observed before and after measurement of the electrical characteristics, and the biological tissues exhibited similar patterns. Through repeated measurements using the impedance/gain-phase analyzer, the coefficient of variation was determined as within 10%. The reproducibility impedance phase difference in electrical characteristics of the biological tissue did not change, and the tissue had resistance. The absolute value of impedance decreased constantly in proportion to the frequency. It has become possible to understand the electrical characteristics of biological tissues through the measurements made possible by the use of the developed.

  14. Fluoroscopy Quality Assurance Measurements: Automatic Exposure Rate Control and Image Quality

    International Nuclear Information System (INIS)

    A fluoroscopy system is a relatively complicated piece of equipment made up of several sub-components. For the operator to achieve good image quality without the overhead of high patient and staff doses, it is essential that all of these components are set up correctly. The automatic exposure rate control (AEC) and image quality are important aspects of a fluoroscopy system. Two principal parameters are used to assess AEC function: air kerma rate at the input phosphor with 1.0 mm copper filtration added and entrance surface dose rate for a 20 cm Perspex phantom. Spatial resolution is measured using the Huettner type 18 spatial frequency grating. The Leeds TO10 contrast-detail test object is used to measure threshold contrast-detail performance. Median limiting spatial resolution was 1.41 lp.mm-1 for image intensifier fields lying between 18 and 24 cm in diameter. Mean low contrast resolution at 63 kV and 0.40 μGy.s-1 was 2.5%. (author)

  15. Automatic Control of the Reciprocating Compressor%往复压缩机的自动控制

    Institute of Scientific and Technical Information of China (English)

    赵庆林

    2013-01-01

    There are mainly logic control and sequence control in automatic control of the reciprocating compressor, and the difficulty is automatic sequence control for the compressor start or stop.Taking a fresh hydrogen compressor as an example,this paper introduces the configuration of an instrument control system for the fresh hydrogen compressor,the realization of the one button controls for full automatic compressor start or stop operation.The good application effect is received.%往复压缩机的自动控制主要体现在逻辑控制和顺序控制2个方面,其中自动开停机顺序控制是此类压缩机的控制难点.本文以某装置新氢压缩机的自动控制为例,介绍该压缩机的仪表控制系统配置集成、一键式全自动开停机顺序控制方案的实现策略,以及所取得的应用效果.

  16. Machine Tool Technology. Automatic Screw Machine Troubleshooting & Set-Up Training Outlines [and] Basic Operator's Skills Set List.

    Science.gov (United States)

    Anoka-Hennepin Technical Coll., Minneapolis, MN.

    This set of two training outlines and one basic skills set list are designed for a machine tool technology program developed during a project to retrain defense industry workers at risk of job loss or dislocation because of conversion of the defense industry. The first troubleshooting training outline lists the categories of problems that develop…

  17. Automatic component calibration and error diagnostics for model-based accelerator control. Phase I final report

    International Nuclear Information System (INIS)

    Phase I work studied the feasibility of developing software for automatic component calibration and error correction in beamline optics models. A prototype application was developed that corrects quadrupole field strength errors in beamline models

  18. Developing free software for automatic registration for the quality control of IMRT with movies

    International Nuclear Information System (INIS)

    In this work, as the commissioner of the e-JMRT, a Monte Carlo calculation network for IMRT planning, has developed software for the automatic recording of the image of the film with the results of the planning system.

  19. Automatic control of the D20 vapor recovery dryers at Cernavoda NPP U2 (CANDU Project 82)

    International Nuclear Information System (INIS)

    The 'D20 vapor Recovery System' is built in the frame of CANDU NPP Cernavoda, Romania, in order to preserve the atmosphere dry inside the Reactor Building. The system includes ten dryers, four tanks and three pumps grouped in thirteen equipment units with cyclic operation. When desiccant bed of the dryers is full of humidity the operating regime is switched automatically from absorption to regeneration. During regeneration, the air from blower discharge is passed through electric heaters and desiccant bed to condenser where the D20 vapor is recovered, and again to fan inlet. The dryer regeneration is completed when its desiccant bed is hot. Also, transferring the contents of the tanks is a batch processing operation. Considering the Cernavoda U1 operating experience, the CANDU project 82, for Cernavoda NPP U2, is now under an improving process, which implies an Automatic Control for the 'D20 vapor Recovery System'. This Automatic Control, performed by Industrial Computers and Data Acquisition System, is able automatically to detect the completion of the equipment unit phases, to switch the equipment unit to appropriate operation mode, to check the proper operating mode and to trip the equipment unit if necessary. This paper intends to present the problems surmounted during the technical specification issuing for designing process. (author)

  20. Evolving a rule system controller for automatic driving in a car racing competition

    OpenAIRE

    Pérez, Diego; Sáez, Yago; Recio, Gustavo; Isasi, Pedro

    2008-01-01

    The techniques and the technologies supporting Automatic Vehicle Guidance are important issues. Automobile manufacturers view automatic driving as a very interesting product with motivating key features which allow improvement of the car safety, reduction in emission or fuel consumption or optimization of driver comfort during long journeys. Car racing is an active research field where new advances in aerodynamics, consumption and engine power are critical each season. Our proposal i...

  1. Stimulus Control and Imagery Training in Treating Sleep-Maintenance Insomnia.

    Science.gov (United States)

    Morin, Charles M.; Azrin, Nathan H.

    1987-01-01

    Compared the relative efficacy of stimulus control and imagery training with a wait-list control condition for treating 21 sleep-maintenance insomniacs. Stimulus control was more effective than either imagery training or no treatment in reducing both the frequency and duration of night-time awakenings, though training showed substantial reductions…

  2. How Life Experience Shapes Cognitive Control Strategies: The Case of Air Traffic Control Training

    Science.gov (United States)

    Arbula, Sandra; Capizzi, Mariagrazia; Lombardo, Nicoletta; Vallesi, Antonino

    2016-01-01

    Although human flexible behavior relies on cognitive control, it would be implausible to assume that there is only one, general mode of cognitive control strategy adopted by all individuals. For instance, different reliance on proactive versus reactive control strategies could explain inter-individual variability. In particular, specific life experiences, like a highly demanding training for future Air Traffic Controllers (ATCs), could modulate cognitive control functions. A group of ATC trainees and a matched group of university students were tested longitudinally on task-switching and Stroop paradigms that allowed us to measure indices of cognitive control. The results showed that the ATCs, with respect to the control group, had substantially smaller mixing costs during long cue-target intervals (CTI) and a reduced Stroop interference effect. However, this advantage was present also prior to the training phase. Being more capable in managing multiple task sets and less distracted by interfering events suggests a more efficient selection and maintenance of task relevant information as an inherent characteristic of the ATC group, associated with proactive control. Critically, the training that the ATCs underwent improved their accuracy in general and reduced response time switching costs during short CTIs only. These results indicate a training-induced change in reactive control, which is described as a transient process in charge of stimulus-driven task detection and resolution. This experience-based enhancement of reactive control strategy denotes how cognitive control and executive functions in general can be shaped by real-life training and underlines the importance of experience in explaining inter-individual variability in cognitive functioning. PMID:27311017

  3. How Life Experience Shapes Cognitive Control Strategies: The Case of Air Traffic Control Training.

    Directory of Open Access Journals (Sweden)

    Sandra Arbula

    Full Text Available Although human flexible behavior relies on cognitive control, it would be implausible to assume that there is only one, general mode of cognitive control strategy adopted by all individuals. For instance, different reliance on proactive versus reactive control strategies could explain inter-individual variability. In particular, specific life experiences, like a highly demanding training for future Air Traffic Controllers (ATCs, could modulate cognitive control functions. A group of ATC trainees and a matched group of university students were tested longitudinally on task-switching and Stroop paradigms that allowed us to measure indices of cognitive control. The results showed that the ATCs, with respect to the control group, had substantially smaller mixing costs during long cue-target intervals (CTI and a reduced Stroop interference effect. However, this advantage was present also prior to the training phase. Being more capable in managing multiple task sets and less distracted by interfering events suggests a more efficient selection and maintenance of task relevant information as an inherent characteristic of the ATC group, associated with proactive control. Critically, the training that the ATCs underwent improved their accuracy in general and reduced response time switching costs during short CTIs only. These results indicate a training-induced change in reactive control, which is described as a transient process in charge of stimulus-driven task detection and resolution. This experience-based enhancement of reactive control strategy denotes how cognitive control and executive functions in general can be shaped by real-life training and underlines the importance of experience in explaining inter-individual variability in cognitive functioning.

  4. How Life Experience Shapes Cognitive Control Strategies: The Case of Air Traffic Control Training.

    Science.gov (United States)

    Arbula, Sandra; Capizzi, Mariagrazia; Lombardo, Nicoletta; Vallesi, Antonino

    2016-01-01

    Although human flexible behavior relies on cognitive control, it would be implausible to assume that there is only one, general mode of cognitive control strategy adopted by all individuals. For instance, different reliance on proactive versus reactive control strategies could explain inter-individual variability. In particular, specific life experiences, like a highly demanding training for future Air Traffic Controllers (ATCs), could modulate cognitive control functions. A group of ATC trainees and a matched group of university students were tested longitudinally on task-switching and Stroop paradigms that allowed us to measure indices of cognitive control. The results showed that the ATCs, with respect to the control group, had substantially smaller mixing costs during long cue-target intervals (CTI) and a reduced Stroop interference effect. However, this advantage was present also prior to the training phase. Being more capable in managing multiple task sets and less distracted by interfering events suggests a more efficient selection and maintenance of task relevant information as an inherent characteristic of the ATC group, associated with proactive control. Critically, the training that the ATCs underwent improved their accuracy in general and reduced response time switching costs during short CTIs only. These results indicate a training-induced change in reactive control, which is described as a transient process in charge of stimulus-driven task detection and resolution. This experience-based enhancement of reactive control strategy denotes how cognitive control and executive functions in general can be shaped by real-life training and underlines the importance of experience in explaining inter-individual variability in cognitive functioning. PMID:27311017

  5. Combining cognitive bias modification training with motivational support in alcohol dependent outpatients : study protocol for a randomised controlled trial

    OpenAIRE

    Boffo, M.; Pronk, T.; Wiers, R.W.; Mannarini, S.

    2015-01-01

    Background Addiction research has hypothesised that automatic and reflective cognitive processes play an important role in the onset and maintenance of alcohol (ab)use, wherein automatic reactions to drug-related cues steer the drug user towards consuming before reflective processes can get over and steer towards a different behavioural response. These automatic processes include the tendency to attend and approach alcohol cues. These biases may be trained away from alcohol via computerised c...

  6. Terminal area automatic navigation, guidance and control research using the Microwave Landing System (MLS). Part 5: Design and development of a Digital Integrated Automatic Landing System (DIALS) for steep final approach using modern control techniques

    Science.gov (United States)

    Halyo, N.

    1983-01-01

    The design and development of a 3-D Digital Integrated Automatic Landing System (DIALS) for the Terminal Configured Vehicle (TCV) Research Aircraft, a B-737-100 is described. The system was designed using sampled data Linear Quadratic Gaussian (LOG) methods, resulting in a direct digital design with a modern control structure which consists of a Kalman filter followed by a control gain matrix, all operating at 10 Hz. DIALS uses Microwave Landing System (MLS) position, body-mounted accelerometers, as well as on-board sensors usually available on commercial aircraft, but does not use inertial platforms. The phases of the final approach considered are the localizer and glideslope capture which may be performed simultaneously, localizer and steep glideslope track or hold, crab/decrab and flare to touchdown. DIALS captures, tracks and flares from steep glideslopes ranging from 2.5 deg to 5.5 deg, selected prior to glideslope capture. Digital Integrated Automatic Landing System is the first modern control design automatic landing system successfully flight tested. The results of an initial nonlinear simulation are presented here.

  7. SU-E-I-24: Method for CT Automatic Exposure Control Verification

    Energy Technology Data Exchange (ETDEWEB)

    Gracia, M; Olasolo, J; Martin, M; Bragado, L; Gallardo, N; Miquelez, S; Maneru, F; Lozares, S; Pellejero, S; Rubio, A [Complejo Hospitalario de Navarra, Pamplona, Navarra (Spain)

    2015-06-15

    Purpose: Design of a phantom and a simple method for the automatic exposure control (AEC) verification in CT. This verification is included in the computed tomography (CT) Spanish Quality Assurance Protocol. Methods: The phantom design is made from the head and the body phantom used for the CTDI measurement and PMMA plates (35×35 cm2) of 10 cm thickness. Thereby, three different thicknesses along the longitudinal axis are obtained which permit to evaluate the longitudinal AEC performance. Otherwise, the existent asymmetry in the PMMA layers helps to assess angular and 3D AEC operation.Recent acquisition in our hospital (August 2014) of Nomex electrometer (PTW), together with the 10 cm pencil ionization chamber, led to register dose rate as a function of time. Measurements with this chamber fixed at 0° and 90° on the gantry where made on five multidetector-CTs from principal manufacturers. Results: Individual analysis of measurements shows dose rate variation as a function of phantom thickness. The comparative analysis shows that dose rate is kept constant in the head and neck phantom while the PMMA phantom exhibits an abrupt variation between both results, being greater results at 90° as the thickness of the phantom is 3.5 times larger than in the perpendicular direction. Conclusion: Proposed method is simple, quick and reproducible. Results obtained let a qualitative evaluation of the AEC and they are consistent with the expected behavior. A line of future development is to quantitatively study the intensity modulation and parameters of image quality, and a possible comparative study between different manufacturers.

  8. An evaluation of three simple phantoms used in quality assurance of automatic exposure control

    International Nuclear Information System (INIS)

    Full text: Different attenuators are used to assess the performance of x-ray systems with automatic exposure control (AEC). Three attenuators, copper, water and hardboard, were compared in this assessment. The Health Physics Service (HPS), which is part of the Department of Medical Physics and Bioengineering at Christchurch Hospital, New Zealand, has chosen to use hardboard as its patient equivalent phantom when testing x-ray equipment simply because it is generally easier to handle compared to water phantoms. Tests were conducted on the hardboard phantom in order to evaluate its effect on radiation in terms of attenuation equivalence, production of scatter and sensitivity to different kilovoltages compared to water or copper. Entrance and exit dose comparison tests were conducted using the AEC on a Philips Optimus 50 x-ray machine. A Keithley Triad Field Service Kit Model 10100A was used to record doses. The first set of tests were designed to ascertain the thickness of water and copper required to produce a similar mAs to the particular thickness of hardboard being examined. The tests were repeated with a film in a cassette which was placed in the bucky tray. Film optical densities were then measured. The hardboard phantom shows a very similar response to radiation as water and hence the human body and is therefore a suitable material for use in the construction of phantoms. Copper produces a very different radiation spectrum and its scattering effects are quite different to water or hardboard. For these reasons we consider copper to be unsuitable for use as a phantom when programming AECs. Copyright (2000) Australasian College of Physical Scientists and Engineers in Medicine

  9. The effect of automatic gain control structure and release time on cochlear implant speech intelligibility.

    Directory of Open Access Journals (Sweden)

    Phyu P Khing

    Full Text Available Nucleus cochlear implant systems incorporate a fast-acting front-end automatic gain control (AGC, sometimes called a compression limiter. The objective of the present study was to determine the effect of replacing the front-end compression limiter with a newly proposed envelope profile limiter. A secondary objective was to investigate the effect of AGC speed on cochlear implant speech intelligibility. The envelope profile limiter was located after the filter bank and reduced the gain when the largest of the filter bank envelopes exceeded the compression threshold. The compression threshold was set equal to the saturation level of the loudness growth function (i.e. the envelope level that mapped to the maximum comfortable current level, ensuring that no envelope clipping occurred. To preserve the spectral profile, the same gain was applied to all channels. Experiment 1 compared sentence recognition with the front-end limiter and with the envelope profile limiter, each with two release times (75 and 625 ms. Six implant recipients were tested in quiet and in four-talker babble noise, at a high presentation level of 89 dB SPL. Overall, release time had a larger effect than the AGC type. With both AGC types, speech intelligibility was lower for the 75 ms release time than for the 625 ms release time. With the shorter release time, the envelope profile limiter provided higher group mean scores than the front-end limiter in quiet, but there was no significant difference in noise. Experiment 2 measured sentence recognition in noise as a function of presentation level, from 55 to 89 dB SPL. The envelope profile limiter with 625 ms release time yielded better scores than the front-end limiter with 75 ms release time. A take-home study showed no clear pattern of preferences. It is concluded that the envelope profile limiter is a feasible alternative to a front-end compression limiter.

  10. SU-E-I-24: Method for CT Automatic Exposure Control Verification

    International Nuclear Information System (INIS)

    Purpose: Design of a phantom and a simple method for the automatic exposure control (AEC) verification in CT. This verification is included in the computed tomography (CT) Spanish Quality Assurance Protocol. Methods: The phantom design is made from the head and the body phantom used for the CTDI measurement and PMMA plates (35×35 cm2) of 10 cm thickness. Thereby, three different thicknesses along the longitudinal axis are obtained which permit to evaluate the longitudinal AEC performance. Otherwise, the existent asymmetry in the PMMA layers helps to assess angular and 3D AEC operation.Recent acquisition in our hospital (August 2014) of Nomex electrometer (PTW), together with the 10 cm pencil ionization chamber, led to register dose rate as a function of time. Measurements with this chamber fixed at 0° and 90° on the gantry where made on five multidetector-CTs from principal manufacturers. Results: Individual analysis of measurements shows dose rate variation as a function of phantom thickness. The comparative analysis shows that dose rate is kept constant in the head and neck phantom while the PMMA phantom exhibits an abrupt variation between both results, being greater results at 90° as the thickness of the phantom is 3.5 times larger than in the perpendicular direction. Conclusion: Proposed method is simple, quick and reproducible. Results obtained let a qualitative evaluation of the AEC and they are consistent with the expected behavior. A line of future development is to quantitatively study the intensity modulation and parameters of image quality, and a possible comparative study between different manufacturers

  11. Performance of an automatic dose control system for CT. Patient studies

    International Nuclear Information System (INIS)

    Purpose: To study the effect of an automatic dose control (ADC) system with adequate noise characteristic on the individual perception of image noise and diagnostic acceptance compared to objectively measured image noise and the dose reductions achieved in a representative group of patients. Materials and Methods: In a retrospective study two matched cohorts of 20 patients each were identified: a manual cohort with exposure settings according to body size (small - regular - large) and an ADC cohort with exposure settings calculated by the ADC system (DoseRight 2.0 trademark, Philips Healthcare). For each patient, 12 images from 6 defined anatomic levels from contrast-enhanced scans of chest and abdomen/pelvis were analyzed by 4 independent readers concerning image noise and diagnostic acceptance on a five-point Likert scale and evaluated for objectively measured image noise. Radiation exposure was calculated from recorded exposure data. Results: Use of the ADC system reduced the average effective dose for patients by 36 % in chest scans (3.2 vs. 4.9 mSv) and by 17 % in abdomen/pelvis scans (7.6 vs. 8.3 mSv). Average objective noise was slightly lower in the manual cohort (11.1 vs. 12.8 HU), correlating with a slightly better rating in subjective noise score (4.4 vs. 4.2). However, diagnostic acceptance was rated almost equal in both cohorts with excellent image quality (4.6 vs. 4.5). Conclusion: Use of an ADC system with adequate noise characteristic leads to significant reductions in radiation exposure for patients while maintaining excellent image quality. (orig.)

  12. Investigation and realization of an automatic device for the control and test of a photon tagging system

    International Nuclear Information System (INIS)

    An intelligent control/test equipment for a monoenergetic photon production system was developed. The device enables simulations to be done outside experimental runs. Operation can be entirely automatic, or controlled by the experimenters. The device is modular and conforms to CAMAC standards. The architecture of the system is based around a local bus which comprises a central unit and its memory; a programmable pulse generator; a switching circuit to test and control the various paths; and a unit to communicate with the acquisition system

  13. The development of an automatic sample-changer and control instrumentation for isotope-source neutron-activation analysis

    International Nuclear Information System (INIS)

    An automatic sample-changer was developed at the Council for Mineral Technology for use in isotope-source neutron-activation analysis. Tests show that the sample-changer can transfer a sample of up to 3 kg in mass over a distance of 3 m within 5 s. In addition, instrumentation in the form of a three-stage sequential timer was developed to control the sequence of irradiation transfer and analysis

  14. Automatic control of the ion-illumination angle in a spark-source mass spectrometer.

    Science.gov (United States)

    Conzemius, R J; Svec, H J

    1973-05-01

    Automatic adjustment of only the spark-gap width in a spark-source mass spectrometer does not ensure that optimum conditions of electrode geometry are maintained with respect to the ion-optics system. A device has been developed which simultaneously maintains a constant gap width and also a more constant z-axis ion-illumination angle. This is the first development to utilize ion-optics parameters to adjust the sparking electrodes automatically. The system maintains the electrodes in an optimum configuration such that higher and more constant instrument sensitivity is maintained automatically. In addition, a significant improvement in the precision of instrumental response is demonstrated. It appears that relative isotopic abundances can be determined directly by the spark-source method which are comparable to those obtained in some cases by surface ionization or by electron bombardment. Results are given that support this contention. PMID:18961307

  15. Curve Squeal of Train Wheels, Part 3: Active Control

    Science.gov (United States)

    HECKL, MARIA A.; HUANG, X. Y.

    2000-01-01

    This paper presents a new method to annul the squeal noise that is produced by trains traversing a curve. The method is a special form of active control, applied to suppress the bending oscillations of a squealing wheel. It is essentially a feedback system with the following components: sensor, narrowband filter, phase-shifter, amplifier and actuator. The control signal driving the actuator has only a single frequency (set at the filter), and that frequency typically corresponds to one of the bending modes of the wheel. Two versions of the feedback system are considered. In the first version, the actuator exerts a control force on the wheel, and in the second version, the actuator imposes a velocity on the rail. A mathematical model is presented and predictions are made for the performance of both versions. The coupling of the different wheel modes by the control system is discussed. A model rig is described which was used for a practical demonstration of this form of active control. Differences from more conventional forms of active control are pointed out.

  16. Review on Methods of Train Running Automatic Adjustment in Transit%城市轨道交通列车运行自动调整研究方法综述

    Institute of Scientific and Technical Information of China (English)

    徐冬

    2015-01-01

    基于城市轨道交通列车运行自动调整的概念和必要性,介绍实现列车运行自动调整的基本思路:时刻表调整和行车间隔调整。并结合国内外学者的研究成果,对目前存在的列车运行自动调整研究方法进行分析,为列车运行自动调整问题的建模和算法实现提供参考。%Based on the concept and necessity of train operation automatic adjustment in urban rail transit, the paper introduces the basic idea for the realization of train operation automatic adjustment, time schedule adjustment and train running interval adjustment. By taking into consideration of the study done by some scholars at home and abroad, the paper makes analysis on the research methods for existing automatic train operation adjustment, and provides references for the modeling and algorithm of train operation automatic adjustment.

  17. Attosecond pulse trains as multi-color coherent control

    CERN Document Server

    Hernández, J V

    2009-01-01

    We present a general description of the interaction between multi-color laser pulses and atoms and molecules, focusing on the experimentally relevant example of infrared (IR) pulses overlapped with attosecond pulse trains (APTs). This formulation reveals explicitly and analytically the role of the delay between the IR pulse and APT as a coherent control parameter. Our formulation also shows the nearly equivalent roles of the delay and the carrier-envelope phase in controlling the interference between different multiphoton pathways. We illustrate these points by investigating the single ionization of He and introduce dressed adiabatic hyperspherical potentials to aid the discussion. We confirm the predictions with a full-dimensional, two-electron solution of the time-dependent Schr\\"odinger equation.

  18. Approach to team skills training of nuclear power plant control room crews

    International Nuclear Information System (INIS)

    An investigation of current team skills training practices and research was conducted by General Physics Corporation for the Office of Nuclear Reactor Regulation. The methodology used included a review of relevant team skills training literature and a workshop to collect inputs from team training practitioners and researchers from the public and private sectors. The workshop was attended by representatives from nuclear utility training organizations, the commercial airline industry, federal agencies, and defense training and research commands. The literature reviews and workshop results provided the input for a suggested approach to team skills training that can be integrated into existing training programs for control room operating crews. The approach includes five phases: (1) team skills objectives development, (2) basic team skills training, (3) team task training, (4) team skills evaluation, and (5) team training program evaluation. Supporting background information and a user-oriented description of the approach to team skills training are provided. 47 refs

  19. AUTOMATIC CLASSIFICATION OF STRUCTURAL MRI FOR DIAGNOSIS OF NEURODEGENERATIVE DISEASES

    Directory of Open Access Journals (Sweden)

    Hernández-Tamames Juan Antonio

    2010-12-01

    Full Text Available This paper presents an automatic approach which classifies structural Magnetic Resonance images into pathological or healthy controls. A classification model was trained to find the boundaries that allow to separate the study groups. The method uses the deformation values from a set of regions, automatically identified as relevant, in a process that selects the statistically significant regions of a t-test under the restriction that this significance must be spatially coherent within a neighborhood of 5 voxels. The proposed method was assessed to distinguish healthy controls from schizophrenia patients. Classification results showed accuracy between 74% and 89%, depending on the stage of the disease and number of training samples.

  20. Active Video Game Exercise Training Improves the Clinical Control of Asthma in Children: Randomized Controlled Trial.

    Directory of Open Access Journals (Sweden)

    Evelim L F D Gomes

    Full Text Available The aim of the present study was to determine whether aerobic exercise involving an active video game system improved asthma control, airway inflammation and exercise capacity in children with moderate to severe asthma.A randomized, controlled, single-blinded clinical trial was carried out. Thirty-six children with moderate to severe asthma were randomly allocated to either a video game group (VGG; N = 20 or a treadmill group (TG; n = 16. Both groups completed an eight-week supervised program with two weekly 40-minute sessions. Pre-training and post-training evaluations involved the Asthma Control Questionnaire, exhaled nitric oxide levels (FeNO, maximum exercise testing (Bruce protocol and lung function.No differences between the VGG and TG were found at the baseline. Improvements occurred in both groups with regard to asthma control and exercise capacity. Moreover, a significant reduction in FeNO was found in the VGG (p < 0.05. Although the mean energy expenditure at rest and during exercise training was similar for both groups, the maximum energy expenditure was higher in the VGG.The present findings strongly suggest that aerobic training promoted by an active video game had a positive impact on children with asthma in terms of clinical control, improvement in their exercise capacity and a reduction in pulmonary inflammation.Clinicaltrials.gov NCT01438294.

  1. Modelling and Simulation for Train Movement Control Using Car-Following Strategy

    International Nuclear Information System (INIS)

    Based on optimal velocity car-following model, in this paper, we propose a new railway traffic model for describing the process of train movement control. In the proposed model, we give an improved form of the optimal velocity function Vopt, which is considered as the desired velocity function for train movement control under different control conditions. In order to test the proposed model, we simulate and analyze the trajectories of train movements, moreover, discuss the relationship curves between the train allowable velocity and the site of objective point in detail. Analysis results indicate that the proposed model can well capture some realistic futures of train movement control. (general)

  2. Automatic sample changer and microprocessor controlled data router for a small bulk-sample counter

    International Nuclear Information System (INIS)

    We have designed a gamma-ray counting system for small bulk-samples that incorporates an automatic sample-changer and multiple data-output device. The system includes an inexpensive microprocessor and is constructed mainly of materials and equipment commonly available at most institutions engaged in nuclear research

  3. Application of a new automatic event-controlled sampler for heavy metals: studies on the behaviour of particle bound heavy metals in the Elbe estuary

    International Nuclear Information System (INIS)

    An automatic, remote-controlled sampling system for heavy metals (AISIT, automatic intelligent sampler for inorganic trace constituents) is presented and its functionality described. In order to characterize the automatic sampler (referring to cleanness/contamination) comparison to manual sampling methods was performed in several campaigns. Results of comparative samples from the German Bight as well as from the buoy META I near Brunsbuettel in the Elbe estuary are discussed. The automatic sampler allows event-triggered sampling, i.e. collecting water samples in dependence on measurement parameters (turbidity, conductivity, etc.). The functionality of automatic, event-controlled sampling within the MERMAID system is described. Time series of event-triggered samples are presented and interpreted. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)

  4. Engine and automatic transmission control system based on estimated turbine torque; Turbine torque suiteichi ni motozuku engine AT sogo seigyo

    Energy Technology Data Exchange (ETDEWEB)

    Kuriyama, M.; Sasaki, K.; Ueno, T.; Nishizato, T. [Mazda Motor Corp., Hiroshima (Japan)

    1996-03-31

    Conventional automatic transmission control systems have required complicated correction means to correspond to changes in operating environments and operating conditions. In order to correspond to these changes simply and precisely, a method was developed to control engine torque during a speed change and coupling oil pressure based on estimated turbine torque. This control system estimates engine output torque itself which varies under different conditions, and converts it to a turbine torque to have changes in the operating environments and operating conditions converge into the estimated turbine torque. Then inertia phasing time and an optimal value of the turbine torque during the inertia phasing are included as a targeted control value. The amount of control is decided from the estimated turbine torque and driving conditions, as well as respective operation models for the automatic transmission and the engine, thus the targeted control value can be realized with high accuracy. As a result, stabilized shift quality may be materialized even if the engine torque changes because of changes in temperatures and atmospheric pressures. 10 figs.

  5. Mine train control system by H{infinity} control; H{infinity} seigyo wo mochiita tanko makiage seigyo system

    Energy Technology Data Exchange (ETDEWEB)

    Ouchi, s. [Tokai University, Tokyo (Japan). Faculty of Engineering; Liu, K. [Chiba University, Chiba (Japan). Faculty of Engineering; Sato, S. [Fuji Electric Corporate Research and Development, Ltd., Kanagawa (Japan); Mita, T. [Tokyo Institute of Technology, Tokyo (Japan). Faculty of Engineering

    1998-03-31

    Mine train control system is consisted of a winder, a train which transports many people to minebottom, and a long wire rope which connects a winder and a train. The mine train control system reported in this paper is the system with the longest rope of about 6700m in the world. This system often generate a rolling of train when the train stops at the station when using conventional control. In conventional systems, two mine train control systems of the length of 1/2 of all mining galleries were used in order to ristrict the rolling. In these systems, change time was necessary. However, this change time become unnecessary by using a system with the length of 6700m. When using this system, it is the main subject how to control the bigger rolling . We solved the problem on the rolling control of this system by using H{infinity} control, and got the result that the travel time of the train made 2/3 compared with that of the conventional systems using two mine train control systems, and the train speed of 420m/min which is the maximum speed in the world was achieved. 7 refs., 8 figs.

  6. Aerobic endurance training versus relaxation training in patients with migraine (ARMIG: study protocol for a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Totzeck Andreas

    2012-04-01

    Full Text Available Abstract Background Migraine is one of the most frequent headache diseases and impairs patients’ quality of life. Up to now, many randomized studies reported efficacy of prophylactic therapy with medications such as beta-blockers or anti-epileptic drugs. Non-medical treatment, like aerobic endurance training, is considered to be an encouraging alternative in migraine prophylaxis. However, there is still a lack of prospective, high-quality randomized trials. We therefore designed a randomized controlled trial to evaluate the efficacy of aerobic endurance training versus relaxation training in patients with migraine (ARMIG. Methods This is a single-center, open-label, prospective, randomized trial. Sixty participants with migraine are randomly allocated to either endurance training or a relaxation group. After baseline headache diary documentation over at least 4 weeks, participants in the exercise group will start moderate aerobic endurance training under a sport therapist’s supervision at least 3 times a week over a 12-week period. The second group will perform Jacobson’s progressive muscle relaxation training guided by a trained relaxation therapist, also at least 3 times a week over a 12-week period. Both study arms will train in groups of up to 10 participants. More frequent individual training is possible. The follow-up period will be 12 weeks after the training period. The general state of health, possible state of anxiety or depression, impairments due to the headache disorder, pain-related disabilities, the headache-specific locus of control, and the motor fitness status are measured with standardized questionnaires. Discussion The study design is adequate to generate meaningful results. The trial will be helpful in gaining important data on exercise training for non-medical migraine prophylaxis. Trial registration The trial is registered at ClinicalTrials.gov: NCT01407861.

  7. The control of automatic imitation based on bottom-up and top-down cues to animacy: Insights from brain and behavior

    NARCIS (Netherlands)

    Klapper, A.P.; Ramsey, R.; Wigboldus, D.H.J.; Cross, E.S.

    2014-01-01

    Humans automatically imitate other people's actions during social interactions, building rapport and social closeness in the process. Although the behavioral consequences and neural correlates of imitation have been studied extensively, little is known about the neural mechanisms that control imitat

  8. Interval-walking training for the treatment of type 2 diabetes: a randomized, controlled trial

    DEFF Research Database (Denmark)

    Karstoft, Kristian; Winding, Kamilla; Knudsen, Sine H.;

    Formål: To evaluate the feasibility of free-living walking training in type 2 diabetes patients, and to investigate the effects of interval-walking training (IWT) versus continuous-walking training (CWT) upon self reported health, physical fitness, body composition and glycemic control. Metoder......: Subjects with type 2 diabetes were randomized to a control (n = 8), CWT (n = 12), or IWT group (n = 12). Training groups were prescribed five sessions per week (60 min/session) and were controlled with an accelerometer and a heart-rate monitor. CWT performed all training at moderate intensity, whereas IWT...... [CGM]). Resultater: Training adherence was high (89 + 4%), and training energy expenditure and mean intensity were comparable between training groups. Nine and four of the subjects reported “Improved Health” in the IWT and CWT group, respectively. VO2max increased 16.1 + 3.7% in the IWT group (P<0...

  9. Automatic registration of geometric distortions in satellite images based on control points

    International Nuclear Information System (INIS)

    This paper presents an automatic registration scheme to register geometric distortion in satellite images; A novel feature based matching scheme is proposed which establishes correspondence between the corner points in the reference and target images either by correlating the intensity values around a circular neighborhood of these corner points or by exploiting the relative orientation of lines connecting these corner points. Affine transformation model is used to estimate transformation parameters. Re-sampling is carried out by nearest neighborhood interpolation. The registration process is automatic and can efficiently serve as preprocessing stage for multitemporal analysis, image fusion, image mosaicking and change detection. The effectiveness of the algorithm has been verified by an intensive experiment on a large number of real images. Experimental results reveal high supremacy of the proposed registration method. (author)

  10. A perception system for accurate automatic control of an articulated bus

    OpenAIRE

    Salinas, Carlota; Montes, Héctor; Armada, Manuel

    2010-01-01

    This paper describes the perception system for an automatic articulated bus where an accurate tracking trajectory is desired. Among the most promising transport infrastructures of the autonomous or semi-autonomous transportation systems, the articulated bus is an interesting low cost and friendly option. This platform involves a mobile vehicle and a private circuit inside CSIC premises. The perception system, presented in this work, based on 2D laser scanner as a prime sensor generates local ...

  11. Automatic Method for Controlling the Iodine Adsorption Number in Carbon Black Oil Furnaces

    OpenAIRE

    Zečević, N.

    2008-01-01

    There are numerous of different inlet process factors in carbon black oil furnaces which must be continuously and automatically adjusted, due to stable quality of final product. The most important six inlet process factors in carbon black oil-furnaces are:1. volume flow of process air for combustion2. temperature of process air for combustion3. volume flow of natural gas for insurance the necessary heat for thermal reaction of conversionthe hydrocarbon oil feedstock in oil-furnace carbon blac...

  12. Prediction of extubation outcome: a randomised, controlled trial with automatic tube compensation vs. pressure support ventilation

    OpenAIRE

    Cohen, Jonathan; Shapiro, Maury; Grozovski, Elad; Fox, Ben; Lev, Shaul; Singer, Pierre

    2009-01-01

    Introduction Tolerance of a spontaneous breathing trial is an evidence-based strategy to predict successful weaning from mechanical ventilation. Some patients may not tolerate the trial because of the respiratory load imposed by the endotracheal tube, so varying levels of respiratory support are widely used during the trial. Automatic tube compensation (ATC), specifically developed to overcome the imposed work of breathing because of artificial airways, appears ideally suited for the weaning ...

  13. Design and Implementation of "Automatic Control Theory" Teaching Aid Software%《自动控制原理》教学辅助软件的设计与实现

    Institute of Scientific and Technical Information of China (English)

    朱钾; 邵桂荣

    2014-01-01

    随着我院向应用型、职业技能型的转型发展,传统的课堂教学模式不能适应新的培养方案及教学大纲的要求。将《自动控制原理》与MATLAB软件相结合,采用MATLAB/GUI设计了《自动控制原理》教学辅助软件,并以频域分析模块为例详细介绍了软件的实现过程。该软件操作简单、灵活,用于课堂教学,改善了理论教学效果,提高了学生的学习兴趣。%As the transformation development of applied and professional skilled university, the traditional classroom teaching mode can’ t adapt the requirements of the new training plan and syllabus. The "Automatic Control Theory" and MATLAB are combined, and"Automatic Control Theory" teaching aid software is designed with MATLAB/GUI. In the case of frequency domain analysis module, software implementation process is intro-duced in detail. The software is simple and flexible to operate. It is proved that the application of software to "Automatic Control Theory" can improve theoretical teaching effect and also inspired the students’ learning inter-est.

  14. Promoting cancer control training in resource limited environments: Lagos, Nigeria.

    Science.gov (United States)

    Nwogu, C; Mahoney, M; George, S; Dy, G; Hartman, H; Animashaun, M; Popoola, A; Michalek, A

    2014-03-01

    In resource limited nations, cancer control is often a lower priority issue creating challenges for the prevention, early diagnosis, and treatment of cancer. Training and education are vital components of efforts to tackle this problem. A 3-day cancer control workshop was conducted at the Lagos State University Teaching Hospital (LASUTH), Nigeria, in 2013. The curriculum included didactic lectures, panel discussions, and interactive sessions on local cancer statistics, preventive strategies, cancer registries, screening and diagnostic options, and treatment approaches with limited resources (chemotherapy, radiotherapy, surgery, and palliative care) and several site-specific (breast, lung, cervical, prostate, and colon) topics. Pre-workshop and post-workshop questionnaires were completed by participants. Eighty-six percent of the 50 workshop participants completed at least one questionnaire. Participants were mainly nurses and physicians (89% of responders), and 40% reported >25 years of practice experience. The more common local needs identified were professional education (65%) and increasing public cancer awareness (63%). The greatest interest for future programs was on research collaborations (70%). An immediate impact of the workshop was the commencement of monthly tumor board conferences and a review of the current cancer registry data. Capacity building is critical for the execution of effective cancer control strategies. Conducting collaborative workshops represents a cost-effective means of launching programs and energizing the medical community to pursue ongoing education and research addressing the anticipated cancer epidemic on the African continent. PMID:24243400

  15. Sibling rivalry: training effects, emergence of dominance and incomplete control.

    Science.gov (United States)

    Benhaiem, Sarah; Hofer, Heribert; Kramer-Schadt, Stephanie; Brunner, Edgar; East, Marion L

    2012-09-22

    Within-brood or -litter dominance provides fitness-related benefits if dominant siblings selfishly skew access to food provided by parents in their favour. Models of facultative siblicide assume that dominants exert complete control over their subordinate sibling's access to food and that control is maintained, irrespective of the subordinate's hunger level. By contrast, a recent functional hypothesis suggests that subordinates should contest access to food when the cost of not doing so is high. Here, we show that within spotted hyena (Crocuta crocuta) twin litters, dominants most effectively skew access to maternal milk in their favour when their aggression prompts a highly submissive response. When hungry, subordinates were less submissive in response to aggression, thereby decreasing lost suckling time and increasing suckling time lost by dominants. In a species where adult females socially dominate adult males, juvenile females were more often dominant than males in mixed-sex litters, and subordinate sisters used more effective counter-tactics against dominant brothers than subordinate brothers against dominant sisters. Our results provide, to our knowledge, the first evidence in a mammal that dominant offspring in twin litters do not exert complete control over their sibling's access to resources (milk), and that sibling dominance relationships are influenced by sibling sex and training effects. PMID:22719032

  16. Fuzzy control on automatic frequency tracking of ultrasonic vibration system with high power and high quality factor Q

    Institute of Scientific and Technical Information of China (English)

    ZHU Wu; ZHANG Jia-min; LIU Hong-li; MENG Feng-feng; ZHANG Zhi-ming

    2009-01-01

    In order to realize automatic tracking drift of resonance frequency of ultrasonic vibration system with high power and high quality factor Q, adaptive fuzzy control was studied with a self-fabricated ultrasonic plastic welding machine. At first, relations between amplitude of vibration and frequency as well as main loop current and amplitude of vibration were analyzed. From this analysis, we deduced that frequency tracking process of the vibration system can be concluded as an optimizing problem of one dimensional fluctuant extremum of main loop current in vibration system. Then a method of self-optimizing fuzzy control, used for the realization of automatic frequency tracking in vibration system, is presented on the basis of self-optimizing adaptive control approach and fuzzy control approach. The result of experiments shows that the fuzzy self-optimizing method can solve the problem of tracking frequency drift very well. Response time of tracking in the system is less than 50 ms, which basically meets the requirements of frequency tracking in ultrasonic plastic welding machine.

  17. PRACTICAL METHODS OF CONTROL AND ESTIMATING THE LEVEL OF SPORTSMEN’S TRAINING

    OpenAIRE

    Victor MUNTIAN; Marin CHIRAZI

    2011-01-01

    Estimating the efficiency quotient in the competitionactivity of a sportsman facilitates the appreciation oftheir actual level of training. Basic data for researchingthe dynamics of the results are the control indicators.The results of the evaluation of the level of training onindicators of operative, current (present) control, ofstage and final control allow realizing the individualcumulative indexes for each sportsman. In order toidentify the integrated index of the sportsmen’s training,it ...

  18. Training elements at different levels in the strategies for control of schistosomiasis

    DEFF Research Database (Denmark)

    Ørnbjerg, Niels; Simonsen, P. E.; Furu, Peter

    1989-01-01

    Recently acquired comprehensive knowledge concerning the epidemiology of schistosomiasis has provided the background for the establishment of schistosomiasis control strategies. However, the planning, implementation, and maintenance of such control programmes requires sufficient numbers of well t...... trained personnel at the local, district and central levels. Training of health personnel as well as motivation of the community are fundamental and essential elements in any schistosomiasis control programme. The training elements and approaches are discussed....

  19. Psilocybin-induced deficits in automatic and controlled inhibition are attenuated by ketanserin in healthy human volunteers.

    Science.gov (United States)

    Quednow, Boris B; Kometer, Michael; Geyer, Mark A; Vollenweider, Franz X

    2012-02-01

    The serotonin-2A receptor (5-HT(2A)R) has been implicated in the pathogenesis of schizophrenia and related inhibitory gating and behavioral inhibition deficits of schizophrenia patients. The hallucinogen psilocybin disrupts automatic forms of sensorimotor gating and response inhibition in humans, but it is unclear so far whether the 5-HT(2A)R or 5-HT(1A)R agonist properties of its bioactive metabolite psilocin account for these effects. Thus, we investigated whether psilocybin-induced deficits in automatic and controlled inhibition in healthy humans could be attenuated by the 5-HT(2A/2C)R antagonist ketanserin. A total of 16 healthy participants received placebo, ketanserin (40 mg p.o.), psilocybin (260 μg/kg p.o.), or psilocybin plus ketanserin in a double-blind, randomized, and counterbalanced order. Sensorimotor gating was measured by prepulse inhibition (PPI) of the acoustic startle response. The effects on psychopathological core dimensions and behavioral inhibition were assessed by the altered states of consciousness questionnaire (5D-ASC), and the Color-Word Stroop Test. Psilocybin decreased PPI at short lead intervals (30 ms), increased all 5D-ASC scores, and selectively increased errors in the interference condition of the Stroop Test. Stroop interference and Stroop effect of the response latencies were increased under psilocybin as well. Psilocybin-induced alterations were attenuated by ketanserin pretreatment, whereas ketanserin alone had no significant effects. These findings suggest that the disrupting effects of psilocybin on automatic and controlled inhibition processes are attributable to 5-HT(2A)R stimulation. Sensorimotor gating and attentional control deficits of schizophrenia patients might be due to changes within the 5-HT(2A)R system. PMID:21956447

  20. Control of high order harmonic emission using attosecond pulse trains

    International Nuclear Information System (INIS)

    Full text: We show that attosecond pulse trains (APTs) are a natural tool for controlling strong field processes such as high order harmonic generation. When used in combination with an intense infrared laser field, the timing of the APT with respect to the infrared (IR) laser field can be used to microscopically select a single quantum path contribution to a process that would otherwise consist of many interfering components. It is through this timing that we predict control over the release of the electron into the continuum, its excursion inside the continuum and consequently influence the yield and coherence properties of the harmonics. Since our initial calculation was based on the time-dependent Schroedinger equation, only single atom effects could be predicted. We have carried out an initial experiment in which we generate the APT from harmonic generation in a xenon fiber target, and focus the APT together with the remaining IR field with an Ag mirror into an He gas jet. The photon spectrum for a fixed time delay between APT and IR field is shown: a clear enhancement of the harmonic spectrum at the cutoff region is seen only when both the APT and the IR field are present. We have predicted control over quantum paths of electron wavepackets using a combination of APT and an IR field, manifesting in the harmonic photon spectrum as order-of-magnitude enhancement of the harmonic yield and spectral cleanup. First experimental results, for a fixed time delay, clearly confirm the enhancement and spectral control, whereas in a future experiment we plan to vary the time delay. Refs. 3 (author)