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International Power engineering Conference (IPEC)

作者： J. Hamar I. Nagy H. Funato Y. Nishida H. Ohsaki E. Masada Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Department of Electrical and Electronic Engineering Utsunomiya University Utsunomiya Japan Department of Electric Electronics and Computer Engineering Chiba Institute of Technology Japan University of Tokyo Tokyo Japan Railway Technology Research Institute Tokyo Japan

The objective of the discrete-time modeling tools is twofold. First, they give an insight into the basic ideas of discrete-time modeling of dc-dc converters for university students and interested power electronics specialists. Second, as it is being presented below, the interactive calculation tools facilitate the fast and simple model development in WEB browser after entering the basic circuit and load parameters. This feature can especially be useful for the practicing design engineers, since without long calculations with matrix functions the linearized discrete-time system model is immediately and automatically developed in both mathematical form (state-space equations and transfer functions in the Z domain) and also in graphical form (pole-zero map and bode plot).

关键词： DC-DC power converters Power electronics Power system modeling Electrical engineering automation Railway engineering Power engineering and energy Electronic learning Vocational training Java

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GA-based fuzzy sliding mode governor for hydro-turbine

GA-based fuzzy sliding mode governor for hydro-turbine

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International Conference on Intelligent control and Information Processing (ICICIP)

作者： Dianwei Qian Jianqiang Yi Xiangjie Liu Xin Li School of Control and Computer Engineering North China Electric Power University Beijing China Institute of Automation Chinese Academy and Sciences Beijing China College of Harbor Coastal & Offshore Engineering Hohai University HHU Nanjing China

This paper presents a novel approach for speed governing of hydro-turbine by means of a sliding mode controller. For selecting a group of parameters of the sliding surface, genetic algorithm is employed to search these parameters. For decreasing the chattering problem of the sliding mode controller, a fuzzy interface system is harnessed to regulate the controller gain. To verify the feasibility and robustness of the control method, simulation results from a hydro turbine unit with the controller designed by the presented procedure are given as an illustration.

关键词： Hydraulic turbines Generators Niobium Robustness Sliding mode control

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research on performance robustness of PID control for TITO process with time delays

Research on performance robustness of PID control for TITO p...

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The 8th World Congress on Intelligent control and automation(第八届智能控制与自动化世界大会 WCICA 2010)

作者： Zengrong Hu Jing Wang Donghai Li Weiqi Li Metallurgical Engineering Research institute　University of Science & Technology Beijing China　Scho Metallurgical Engineering Research institute University of Science & Technology Beijing China State Key Lab of Power Systems Dept of Thermal　Engineering Tsinghua University Beijing China Department of automatic control，School of Automation Beijing Institute of Technology，Beijing ，China

PID controller has simple structure and easy applicability with strong performance robustness. Decentralized PID controller and decoupling PID controller are widely adopted in the control of two-input-two-output (TITO) processes. Firstly, a simple decoupling controller matrix and a desired dynamic decoupling controller matrix are designed according to the idea of coupling matrix. And then three schemes of controller including decentralized PID controller, simple PID decoupling controller and desired dynamic PID decoupling controller are provided based on the excellent characteristic of DDE. Lastly, the Monte-Carlo stochastic experiment is introduced to analyze performance robustness of the controllers. The simulation experiments illustrate that the simple decoupling control scheme has the ability of complete decoupling and better performance robustness.

关键词： Robustness Mathematical model Distributed control Equations Delay effects Process control

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Cooperative control With Improvable Network Connectivity

Cooperative Control With Improvable Network Connectivity

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American control Conference

作者： Chaoyong Li Zhihua Qu Abhijit Das Frank Lewis School of Electrical Engineering and Computer Science University of Central Florida Orlando FL 32816 USA Automation & Robotics Research Institute University of Texas Arlington TX 76118 USA

ISBN: (纸本)9781424474264

In this paper, an efficient approach to improve the connectivity of any given network is provided by introducing an additional node into the network. More specifically, the additional node acts as a neighbor to certain pair of nodes in the network with only changing one link among the existing nodes. The location of the additional node is designed according to the current topology as well as the states, and it has been proved that, controlling the most-connected node will in general improve the convergence rate of the network. Moreover, the proposed method overcomes the dependence of the convergence rate on the Fiedler value. In particular, the convergence problem is converted to a standard stability problem by using the cooperative control Lyapunov function, and a state-feedback controller with switching logic in finding the observed node is designed to guarantee the fast convergence. Simulation results demonstrate the effectiveness of the proposed strategy in speeding up consensus in a network.

关键词： Convergence Iterative algorithms Chaos Network topology Stability Lyapunov method Laplace equations Robotics and automation Unmanned aerial vehicles Logic design

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Automatic test case generation in model based software design to achieve higher reliability

Automatic test case generation in model based software desig...

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International Conference on Reliability, Safety and Hazard (ICRESH)

作者： A. Wakankar A.K. Bhattacharjee S.D. Dhodapkar P.K. Pandya Kavi Arya Reactor Control Division Bhabha Atomic Research Centre Mumbai India School of Technology & Computer Science Tata Institute of Fundamental Research Mumbai India CSE IIT Bombay India Department of Computer Science & Engineering Indian Institute of Technology Mumbai India

Model based design methodology is increasingly being used in the development of software for embedded controllers for safety class applications. SCADE Suite is a set of tools that support model based design of software for embedded systems. The model validation activity in SCADE involves model simulation guided by set of test cases that are based on system requirements (Functional or blackbox) and structural coverage criteria like MC/DC (Whitebox). However, systematically devising a test case based on such criterion is not easy and often the designer is required to analyze the model to design a test sequence, which will meet the required criteria. In this paper, we demonstrate the use of a technique based on model checking to automate the generation of such test cases for SCADE models. For automatic test case generation, the tool SAL-ATG was used that can generate the test cases for the models developed in SAL specification language. MCIDC coverage criterion was adopted for generating the test goals to be covered by generated test cases.

关键词： Analytical models Manuals Educational institutions

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Neural correlates of top-down letter processing

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Neuropsychologia 2010年第2期48卷 636-641页

作者： Liu, Jiangang Li, Jun Zhang, Hongchuan Rieth, Cory A. Huber, David E. Li, Wu Lee, Kang Tian, Jie Department of Biomedical Engineering School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China Life Science Research Center Xidian University Xi'an Shaanxi 710071 China Institute of Automation Chinese Academy of Sciences Beijing 100190 P.O. Box 2728 China Northwestern University United States University of California San Diego United States University of Toronto Canada

This fMRI study investigated top-down letter processing with an illusory letter detection task. Participants responded whether one of a number of different possible letters was present in a very noisy image. After initial training that became increasingly difficult, they continued to detect letters even though the images consisted of pure noise, which eliminated contamination from strong bottom-up input. For illusory letter detection, greater fMRI activation was observed in several cortical regions. These regions included the precuneus, an area generally involved in top-down processing of objects, and the left superior parietal lobule, an area previously identified with the processing of valid letter and word stimuli. In addition, top-down letter detection also activated the left inferior frontal gyrus, an area that may be involved in the integration of general top-down processing and letter-specific bottom-up processing. These findings suggest that these regions may play a significant role in top-down as well as bottom-up processing of letters and words, and are likely to have reciprocal functional connections to more posterior regions in the word and letter processing network. © 2009 Elsevier Ltd. All rights reserved.

关键词： fMRI Letter processing Top-down processing Word processing

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Segmentation of cell nuclei within complex configurations in images with colon sections

Segmentation of cell nuclei within complex configurations in...

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IEEE International Conference on Intelligent computer Communication and Processing (ICCP)

作者： Radu Rogojanu Giovanna Bises Cristian Smochina Vasile Manta Institute of Pathophysiology and Allergy Research Medical University Vienna Austria Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania

This paper addresses the development of an automatic segmentation technique for detecting cell nuclei. The technique uses a new approach for segmenting nuclei in images taken from tissues with colon carcinoma. The segmentation problems encountered in these images and solved by the proposed technique are related to the non-uniform illumination on the background, out-of-focus nuclei, the physical structure of cells in the tissue section, the activity status of the cell and the clustered cell nuclei. First, the region growing method is used for accurate background detection. The separation regions between grouped cell nuclei are detected using the cross-correlation method and validated based on their link with the background. Then, the nuclei boundaries are identified by applying the watershed algorithm on the complemented distance transform of the binary image containing the selected separation lines.

关键词： Image segmentation Pixel Correlation Transforms Anisotropic magnetoresistance Tensile stress Kernel

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An Electric Ray Inspired Biomimetic Autonomous Underwater Vehicle

An Electric Ray Inspired Biomimetic Autonomous Underwater Ve...

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American control Conference

作者： P. Krishnamurthy F. Khorrami J. de Leeuw M. E. Porter K. Livingston J. H. Long Control/Robotics Research Laboratory (CRRL) Department of Electrical and Computer Engineering Polytechnic Institute of NYU Brooklyn NY 11201 Vassar College Poughkeepsie NY 12604

ISBN: (纸本)9781424474264

The development of a novel Biologically-inspired (or Biomimetic) Autonomous Underwater Vehicle (BAUV) inspired by the Pacific electric ray is addressed. The design and hardware implementation of experimental prototypes of the "RayBot" BAUV are described. Extensive observations of live electric rays provided key biological inspirations in the development of the BAUV. As part of the effort, a six degree-of-freedom impulse-based multi-body approach for modeling and simulation of BAUVs was also developed and validated through comparison with experimental data.

关键词： Torpedinidae Autonomous underwater vehicles underwater vehicles Biomimetics

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A new watershed algorithm for protein spot detection in 2DGE images using the notion of fuzzy relations

A new watershed algorithm for protein spot detection in 2DGE...

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International Conference on computer Technology and Development (ICCTD)

作者： Shaheera Rashwan Talaat Faheem Amany Sarhan Bayumy A.B. Youssef Informatics Research Institute Mubarak City of Science and Technology Alexandria Egypt Computer Science and Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt

An important issue in the analysis of two-dimensional electrophoresis images is the detection and quantification of protein spots. The main challenges in the segmentation of 2DGE images are to separate overlapping protein spots correctly and to find the abundance of weak protein spots. To enable comparison of protein patterns between different samples, it is necessary to match the patterns so that homologous spots are identified. In this paper we describe a new robust technique to segment and model the different spots present in the gels. The watershed segmentation algorithm is modified to handle the problem of over segmentation by initially partitioning the image to mosaic regions using the composition of fuzzy relations. The experimental results showed the effectiveness of the proposed algorithm to overcome the over segmentation problem associated with the available algorithms.

关键词： Image segmentation Zinc Databases Pixel

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A distributed control approach to robust output regulation of networked linear systems

A distributed control approach to robust output regulation o...

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International Conference on control and automation (ICCA)

作者： Xiaoli Wang Yiguang Hong Jie Huang Zhong-Ping Jiang Key Laboratory of Systems and Control Chinese Academy and Sciences Beijing China Mechanical and Automation Engineering Chinese University of Hong Kong Hong Kong China Electrical and Computer Engineering Polytechnic Institute of New York University Brooklyn NY USA

In this paper, the robust output regulation problem of a networked linear system with uncertainties is considered. Based on internal model, distributed control scheme is adopted to achieve the objectives of asymptotic tracking and disturbance rejection in a networked uncertain system where both the reference inputs and disturbances are generated by an exosystem. Both state and output feedback designs are given.

关键词： Distributed control Robust control Linear systems control systems Robustness Bismuth Uncertain systems Output feedback Feedback control Automatic control

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