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2006 International Conference on Power System Technology, POWERCON2006

作者： Sun, Rong-Fu Fan, Yue Song, Yong-Hua Sun, Yuan-Zhang Zhang, Chang-Hua Niu, Shuan-Bao IEEE Department of Electrical Engineering Tsinghua University Beijing 100084 China Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Aoademy of Sciences Beijing 100080 China Northwest China Grid Company Xi'an 710048 Shanxi Province China Sohool of Engineering and Design Brunel University London United Kingdom

ISBN: (纸本)1424401119

In the environment of the power market, available transfer capability (ATC) is a measure of transfer capability remaining in the physical transmission network for future commercial activity over and above already committed uses, then it is an important parameter for all companies participating in the power transmission activities. Widely used ATC calculation software -Powerworld simulates power transfer increment through decreasing generation output in sink area (receiving-end) using the repeated power flow method, but this simulation model does not accord with the actual circumstances of electricity shortage in China. In this paper, a combined method including linear distribution factors and repeated power flow (RPF) is proposed to perform ATC calculation, meanwhile, two scenarios can be selected to simulate power transfer increment: One is to increase the total generation output in source area as the load in sink area increases;The other is to decrease the same amount of generation in sink area while the generation output in source area is to be increased. According to the tests applied in the Northwest China Power Network to perform ATC calculation and analysis, this method guarantees more exact results by simulating actual transfer increasing mode of the Northwest China Power Network. © 2006 IEEE.

关键词： Computer software

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Multiple Cooperating Swarms for Data Clustering

Multiple Cooperating Swarms for Data Clustering

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IEEE Swarm Intelligence Symposium, SIS

作者： Abbas Ahmadi Fakhri Karray Mohamed Kamel Systems Design Engineering Department Pattern Analysis and Machine Intelligence Laboratory Waterloo ONT Canada Electrical and Computer Engineering Department Pattern Analysis and Machine Intelligence Laboratory Waterloo ONT Canada

A new clustering technique by the use of multiple swarms is proposed. The proposed technique mimics the behavior of biological swarms which explore food situated in several places. We model the clustering problem using particle swarm optimization (PSO) approach. The proposed method considers multiple cooperating swarms to find centers of clusters. By assigning a portion of the solution space to each swarm, the exploration ability to find the solution is enhanced. Moreover, the cooperation among swarms increases the between-class distance. The proposed method outperforms k-means clustering as well as conventional PSO-based clustering techniques

关键词： Particle swarm optimization Data engineering design engineering Biology computing Birds Educational institutions Marine animals Space exploration Equations Pattern analysis

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Real-time full-field 3-D surface-shape measurement using off-the-shelf components and a single processor

Real-time full-field 3-D surface-shape measurement using off...

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International Conference on 3D Imaging, Modeling, Processing, Visualization and Transmission (3DIMPVT)

作者： Peirong Jia Jonathan Kofman Chad English Computer Vision and Systems Laboratory Department of Electrical and Computer Engineering Laval University QUE Canada Department of Mechanical Engineering University of Ottawa Ottawa ONT Canada Department of Systems Design Engineering University of Waterloo Waterloo ONT Canada Neptec Design Group Limited Kanata ONT Canada

Phase-shifting fringe-projection methods have been increasingly used for three-dimensional (3D) object surface modeling to permit full-field measurement. This paper presents a real-time full-field high-resolution 3D surface-shape measurement system implemented with an efficient 3D shape measurement pipeline and triangular-pattern phase-shifting based on off-the-shelf components, software synchronization and a single computer-processor. The system projects computer-generated fringe patterns with a triangular intensity profile onto an object via a Digital Light Processing (DLP) projector. The projected patterns are electronically shifted and a CCD camera synchronized with the DLP projector by software captures the images from another direction. The captured images are processed by a single computer to reconstruct the 3D shape using triangular-pattern phase-shifting algorithms, and the model is displayed in real time. The 3D shape acquisition system achieved a speed of 5.6 fps for an image size of 648times494 pixels using the two-step triangular-pattern phase-shifting method, without any hardware synchronization or dual processing.

关键词： Phase measurement Shape measurement Real time systems Software measurement Pipelines Charge coupled devices Charge-coupled image sensors Computer displays Image reconstruction Pixel

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OPTIMAL CONTROL FOR TWO-DIMENSIONAL LINEAR systems WITH VARIABLE COEFFICIENTS

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Asian Journal of Control 2008年第4期1卷

作者： Jimshone Li Jason Sheng-Hong Tsai Leang-San Shieh Control System Laboratory Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan R.O.C. Jim-Shone Li was born in Taiwan R. O.C. on April 20 1967. He received B.S. and M.S. degrees in Electrical Engineering from the Chung-Cheng Institute of Technology Taoyuan Taiwan R.O.C. in 1989 and 1993 respectively. He is currently a Ph.D. student at National Cheng-Kung University Tainan Taiwan R.O.C. His research interests include analysis and design of multidimensional systems and nonlinear system control. Department of Electrical and Computer Engineering University of Houston Houston TX 77004-4793 U.S.A.

An optimal control method for two-dimensional (2-D) linear systems with variable coefficients and free boundary conditions in Roesser's model is proposed in this paper. Based on Roesser's model, an equivalent general 1-D model of the 2-D system is presented, and the problem of minimizing a 2-D linear quadratic (LQ) cost function is solved for the case where complete state information is available. The solution is obtained by using the proposed dynamic programming in 1-D descriptor form to solve the Riccati equation and then arriving at the optimal control law and minimum cost. The proposed control methodology can be applied to discrete-time models of systems described by partial differential equations and can also be used in the field of signal processing.

关键词： Two-dimensional system optimal control Roesser's model Riccati equation

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480-GMACS/mW resonant adiabatic mixed-signal processor array for charge-based pattern recognition

480-GMACS/mW resonant adiabatic mixed-signal processor array...

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作者： Karakiewicz, Rafal Genov, Roman Cauwenberghs, Gert Department of Electrical and Computer Engineering University of Toronto Toronto ON M5S 3G4 Canada Snowbush Microelectronics Toronto ON M5G 1Y8 Canada Integrated Systems Neuroscience Laboratory University of California at San Diego San Diego CA 92093-0357 United States

A resonant adiabatic mixed-signal VLSI array delivers 480 GMACS (10 9 multiply-and-accumulates per second) throughput for every mW of power, a 25-fold improvement over the energy efficiency obtained when resonant clock generator and line drivers are replaced with static CMOS drivers. Losses in resonant clock generation are minimized by activating switches between the LC tank and DC supply with a periodic pulse signal, and by minimizing the variability of the capacitive load to maintain resonance. We show that minimum energy is attained for relatively wide pulse width, and that typical load distribution in template-based charge-mode computation implies almost constant capacitive load. The resonantly driven 256 × 512 array of 3-T charge-conserving multiply-accumulate cells is embedded in a template matching processor for image classification and validated in a face detection task. © 2007 IEEE.

关键词： Template matching

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TRACKING CONTROL IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of Control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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Passive Sensor Based Dynamic Object Association Method in Wireless Sensor Networks

Passive Sensor Based Dynamic Object Association Method in Wi...

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50th IEEE International Midwest Symposium on Circuits and systems (MWSCAS'07), vol.3

作者： Shung Han Cho Jinseok Lee Xi Deng Sangjin Hong We-Duke Cho Department of Electrical and Computer Engineering Mobile Systems Design Laboratory Stony Brook University-SUNY Stony Brook NY USA Department of Electronics Engineering College of Information Technology Ajou University South Korea Stony Brook Univ.-SUNY Stony Brook Mobile Systems Design Lab. Dept. of Electrical and Computer Engineering Stony Brook University-SUNY NY 11794-2350 USA Dept. of Electronics Engineering College of Information Technology Ajou University South Korea

This paper proposes and presents a novel algorithm for dynamic data association in wireless sensor networks. The sensor node incorporates RFID reader and acoustic sensor where the signals are fused for tracking and associating multiple objects. The RFID tag is used for object identification and acoustic sensor is used for estimating object movement. The threshold based association algorithm is proposed and its performance is analyzed. The association performance under single node coverage and multiple node coverage is evaluated as a function of sampling time and the dynamic behavior. The algorithm minimizes the failed association and provides association recovery.

关键词： Wireless sensor networks Acoustic sensors Radiofrequency identification Signal processing RFID tags Acoustic signal detection Sensor phenomena and characterization Object detection Target tracking Acoustical engineering

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Spectral content characterization for efficient image detection algorithm design

Eurasip Journal on Advances in Signal Processing

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Eurasip Journal on Advances in Signal Processing 2007年 2007卷

作者： Park, Kyoung-Su Hong, Sangjin Park, Peom Cho, We-Duke Mobile Systems Design Laboratory Department of Electrical and Computer Engineering Stony Brook University - SUNY Stony Brook NY 11794-2350 United States Department of Industrial and Information Systems Engineering Ajou University Suwon-Si 442-749 Korea Republic of Humintec Co. Ltd. Suwon-Si 443-749 Korea Republic of Department of Electronics Engineering College of Information Technology Ajou University Suwon-Si 442-749 Korea Republic of

This paper presents spectral characterization for efficient image detection using hyperspectral processing techniques. We investigate the relationship between the number of used bands and the performance of the detection process in order to find the optimal number of band reductions. The band reduction significantly reduces computation and implementation complexity of the ***, we define and characterize the contribution coefficient for each band. Based on the coefficients, we heuristically select the required minimum bands for the detection process. We have shown that the small number of bands is efficient for effective detection. The proposed algorithm is suitable for low-complexity and real-time applications.

关键词： Image analysis

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Data Traffic Analysis in Wireless Fusion Network with Multiple Sensors

Data Traffic Analysis in Wireless Fusion Network with Multip...

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50th IEEE International Midwest Symposium on Circuits and systems (MWSCAS'07), vol.3

作者： Jinseok Lee Sangkil Jung Yuntai Kyong Xi Deng Sangjin Hong We-Duke Cho Stony Brook University-SUNY Stony Brook NY USA Mobile Systems Design Laboratory Department of Electrical and Computer Engineering Stony Brook University-SUNY Stony Brook NY USA Department of Electronics Engineering College of Information Technology Ajou University South Korea

In this paper, we consider a wireless fusion sensor network where multiple types of sensors are incorporated in each sensor node. Each sensor node incorporates a RFID reader and a acoustic sensor. The RFID reader senses the proximity of target objects and acoustic sensors detect the objects for position estimations. The object positions estimated by both sensors are compensated by visual sensor to obtain more accurate object coordinates. In this paper, we perform network traffic analysis for the wireless fusion sensor network by using NS-2 simulations under various network scenarios. The analysis includes the feasibility of fusion network, hop-by-hop delay, and end-to-end delay.

关键词： Wireless sensor networks Telecommunication traffic Data analysis Sensor fusion Acoustic sensors Radiofrequency identification Acoustic signal detection Object detection Traffic control Performance analysis

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SPECTS O-CDMA field trials using subpicosecond pulses and integrated encoders/decoders across 80.8-km and 150-km links

SPECTS O-CDMA field trials using subpicosecond pulses and in...

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International Conference on Photonics in Switching (PS)

作者： N.K. Fontaine C. Yang R.P. Scott V.J. Hernandez F. Soares R. Broeke K. Perry G. Nowak W. Cong K. Okamoto B.H. Kolner Z. Ding J.P. Heritage S.J.B. Yoo Department of Electrical and Computer Engineering University of California Davis CA USA Department of Applied Science University of California Davis CA USA Key Laboratory for Micro/Nano Technology and System of Liao-ning ProvinceAerospace Systems Design Laboratory Massachusetts Institute of Technology Lexington MA USA

We compare two field demonstrations of SPECTS-OCDMA on an 80.8-km link and 150-km link using integrated, polarization independent arrayed-waveguide grating (AWG)-based encoders/decoders, an ultra-stable optical freque... 详细信息

关键词： Decoding Fiber nonlinear optics Nonlinear optics Optical receivers Frequency Optical pulses Optical pulse shaping Optical modulation Laboratories Polarization mode dispersion

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