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A NEW PROTECTION CRITERION FOR HIGH-VOLTAGE TRANSMISSION LINE BASED ON TWO-END TRANSIENT SIGNALS

A NEW PROTECTION CRITERION FOR HIGH-VOLTAGE TRANSMISSION LIN...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Huang Yizhuang Xia Mingchao Zhao Woquan Liu Yinlai Department of Electrical Engineering, TsingHua University, BeiJing, China 100084 XinHui Bureau of Electric Power Industry, GuangDong Province, China 529100

A new criterion of high-speed protection for highVoltage transmission line based on the wavelettransform of two-end data is presented. By comparingthe Lipschitz exponent and time of the wavelet modulusmaxima of voltages of both ends, in-zone faults andout-zone faults and switching operations can bedistinguished. Simulations are carried out for testing thecriterion, and the influences of fault locations andnoises are discussed.

关键词： Transient Based Protection Transmission Line Protection Wavelet Transform Edge Detection Two-end Protection

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COMPLEX MULTIPLE FEATURES TRACKING ALGORITHM IN MOTION CATPURE

COMPLEX MULTIPLE FEATURES TRACKING ALGORITHM IN MOTION CATPU...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： LUO Zhongxiang LIANG Ronghua College of Computer Science and Engineering, Zhejiang University, Hangzhou,China, 310027 Dept of Computer Science and Engineering, Hangzhou Institute of Electronics Engineering, 310037

To track complex multiple features in video sequences isalways a challenging problem, we present a feature-tracking algorithmintegrating feature recognition and feature match in this *** to feature attributes and relationship among estimated features,extracted features are classifies as four types of features. Then differentquantitative matching strategies are applied to track different kinds offeatures. To verify the tracks, cross correlation test and predicted 3Dmodel based test are used to test and remove outliers. The contributionsand characters of each attribute are considered in our algorithm. Theexperimental results demonstrate the efficiency of the presented motion-tracking algorithm.

关键词： feature tracking motion capture

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USING NEURAL NETWORK IN COLOR CLASSIFICATION

USING NEURAL NETWORK IN COLOR CLASSIFICATION

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： QI Yingjian LUO Siwei LI Jianyu HUANG Huakun Department of Computer Science and Technology, Northern Jiaotong University, Beijing, China 100044 Information Engineering School. Beijing Broadcasting Institute, Beijing, China

The Artificial Neural Network (ANN) has widelybeen used in the field of pattern classification. The main taskof image segmentation is to extract interested objects placedat different locations in images, so it is a kind of patternclassification problem. It can be treated as maximumlikelihood estimation problem in color image whenrepresented in color histogram. In order to improve theflexibility of the classify result in changed environment wepropose the method of training the color pattern in a neuralnetwork using the EM algorithm which is a general methodfor maximum likelihood problem. Experiment proved that itis applicable and significant.

关键词： Artificial Neural Network Image Segmentation Color Classification Expectation-Maximization (EM) Algorithm

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Utility Voltage Correction Implementing PV-Distributed Generation

Utility Voltage Correction Implementing PV-Distributed Gener...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Fadia M.A.Ghali Shawki H.Arafah Electronics Research Institute Benha Higher Institute for Technology

Electric utilities are constantly planning toexpand transmission and distribution *** fact of the huge capital investmentrequired, distributed generation is viewed as abetter strategy than the traditional expensivelarge projects development *** sited PV-dispersed systems couldhelp reducing the voltage violation ***, statistics gained from differentstudies identified the problem of power qualityas a site specific;consequently a site specificsolution should be declared. These distributedPV-systems are functioning as voltagemagnitude and/or phase support. Three single-phase PV-system are located behind the point ofvoltage violation. A feeder line with PV-systemis simulated with MATLAB to study differentviolation cases, to assess the ability ofdistributed renewable systems solving networkproblems.

关键词： PV dispersed systems voltage support I-ph inverter

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A NEW LMS BASED FOURIER ANALYZER FOR SINUSOIDAL SIGALS WITH TIME-VARYING AMPLITUDE

A NEW LMS BASED FOURIER ANALYZER FOR SINUSOIDAL SIGALS WITH ...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Norimasa Kudoh Yuichi Takeuchi Yoshiaki Tadokoro Hachinohe National College of Technology Uwanotai 16-1 Tamonoki Hachinohe-shi 039-1192 Japan Hachinohe National College of Technology Uwanotai 16-1 Tamonoki Hachinohe-shi 039-1192 Japan Toyohashi University of Technology Hibarigaoka 1-1 Temtaku-cho Toyohashi-shi 441-8580 Japan

A new LMS based Fourier analyzer forsinusoidal signals with time-varying amplitude isproposed. The frequency response of the proposedalgorithm in the steady state is derived in order toprovide filtering insight of the proposed adaptivealgorithm in the steady state. From numericalexperiment, it is found that the proposed methodcan track each amplitude of cosine and sinesignals much faster than the conventional LMSmethod.

关键词： LMS A NEW LMS BASED FOURIER ANALYZER FOR SINUSOIDAL SIGALS WITH TIME-VARYING AMPLITUDE

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A COMPREHENSIVE TRAINING FOR WAVELET-BASED RBF CLASSIFIER FOR POWER QUALITY DISTURBANCES

A COMPREHENSIVE TRAINING FOR WAVELET-BASED RBF CLASSIFIER FO...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： T.A.HOANG D.T.NGUYEN University of Tasmania - Australia GPO Box 252-65 Hobart Tasmania 7001-Australia University of Tasmania - Australia GPO Box 252-65 Hobart Tasmania 7001-Australia

In this paper we demonstrate that the dominantfrequencies and Lipschitz exponents in non-stationarv andtransitory power quality disturbances. effciently extractedfrom their wavelet transform modulus maxima (WTMM)in the time-scale domain. can serve as powerfuldiscriminating features for wavelet-based classification ofthese disturbances. We also propose a comprehensive"Knowledge-based" algorithm for the training of the radialbasis function (RBF) network classifier so that at itsconvergence. the network gives both the optimal featureweight vector as well as the cluster centres and scalingwidths.

关键词： Wavelets Radial Basis Function Networks Pattern Classification Power Quality Disturbances

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PHOTONIC CRYSTAL FIBERS

PHOTONIC CRYSTAL FIBERS

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Abhishek Shukla Amit Bhalla Puneet Kandhari Delhi College of Engineering Delhi University New Delhi India 110042 Delhi College of Engineering Delhi University New Delhi India 110042 Delhi College of Engineering Delhi University New Delhi India 110042

In the paper we discuss recently developed fibers called HOLEYFIBERS mid their special class called PHOTONIC CRYSTALFIBERS (PCF's). Also a new Communication and OpticalNetworking system employing Holey optical fiber is discussed. Inthe new model of light propagation the transverse refractive indexprofile and modal electric field are decomposed using orthogonalfunctions and the results obtained are employed in creating newWDM and DWDM communication systems and their possibleutilisation in optical networks. Also a number of areas of interestin these fibers and their applications to communication systems areexplored.

关键词： PCF PMD WDM DWDM modal fields and areas

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The Performance of Prerake Diversity Combining Under Imperfect Channel Estimation Based on QPSK Modulation in TDD CDMA System

The Performance of Prerake Diversity Combining Under Imperfe...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Yue Song Yan Xiao Institute of Information Science, Northern Jiaotong University Beijing, China Postal code: 100044

This paper analyzes the performance of preraketechniques, which is proposed for the time-division duplex (TDD)code-division multiple-access (CDMA) systems, based onquarter phase-shift keying (QPSK) modulation. This analysis isunder both perfect and imperfect channel estimation, and theobtained bit error rate (BER) is simulated through Monte-Carlointegration. Then we can see the differencc of performancebetween the ideal and the nonideal prerake systems. Also we cansee the impaet of the number of paths and users.

关键词： TDD-CDMA DS-SS Rake Receiver Finger Multipath Fading QPSK Maximal Ratio Combining Diversity Gain

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THERMODYNAMIC UNIT MATRIX ANALYSIS METHOD FOR THE THERMAL ECONOMICS OF COAL FIRED POWER PLANT SHAFT GLAND SYSTEM

THERMODYNAMIC UNIT MATRIX ANALYSIS METHOD FOR THE THERMAL EC...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Chunfa Zhang Haiping Chen Jizhen Liu Quangui Fan Bao Zhang North China Electric Power University Baoding Hebei China 071003

In this paper. thcrmodynamic unit matrix analysis methodis used to research the general regulation and thermodynamicessence of the thermo-economic changes caused by the shaftgIand system. On the base of the traditional thermal balancemethod, we developed a new approach for calculating the shaftgland system's thermo-economics. The new method hascharacteristics of clear concept, broad application and easypopularization Furthrmore, it is even more helpful tocomputerize the thermo-economic analsis of the thermalsystem and energy conservation on-line monitoring.

关键词： cycle THERMODYNAMIC UNIT MATRIX ANALYSIS METHOD FOR THE THERMAL ECONOMICS OF COAL FIRED POWER PLANT SHAFT GLAND SYSTEM POWER

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COMPENSATION NETWORK REAL-TIME INSPECTING AND MEASURING SYSTEM BASED ON NEW THEORY

COMPENSATION NETWORK REAL-TIME INSPECTING AND MEASURING SYST...

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： LI Lingling ZHAO Quanming LI Renjie JIANG Dong LI Wenhua Hebei University of Technology, Tianjin China 300130

A new theory on tuning-off degree in compensationnetwork is adopted to realize direct measuring this keyparameter of power network. With high precision, themeasuring error is not more than 0.56%, with good real-timeproperty. the measuring procedure is less than 20 *** are no interference between measuring equipments andpower network and no special communication is required. Thereal-time inspecting and measuring system of networkcontrolled by microcomputer is designed and can inspect andmeasure the tuning-off degree in a wide range of [-96%, 84%].The system can communicate with the automatic-tuningmechanism so as to take corresponding protection measures tomake power network operate safety.

关键词： Compensation network Tuning-off degree Automatic tuning Real-time Inspecting and measuring

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