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Accurate Parallel Algorithm for Adini Nonconforming Finite Element

Tsinghua Science and technology 2003年第2期8卷 145-150页

作者： LUO Ping(罗平) ZHOU Aihui(周爱辉) Department of Computer Science and Technology Tsinghua University Beijing 100084 China Institute of Computational Mathematics and Scientific Engineering Computing Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

The solution of the biharmonic equation using Adini nonconforming finite elements are considered and results for the multi-parameter asymptotic expansions and extrapolation are reported. The Adini nonconforming finite element solution of the biharmonic equation is shown and it have a multi-parameter asymptotic error expansion and extrapolation. This expansion and a multi-parameter extrapolation technique are used to develop an accurate approximation parallel algorithm for the biharmonic equation. Finally, numerical results have verified the extrapolation theory.

关键词： Finite element method

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Observation of frequency oscillation in Western Japan 60Hz power system based on multiple synchronized phasor measurements

Observation of frequency oscillation in Western Japan 60Hz p...

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2003 IEEE Bologna PowerTech Conference

作者： Hojo, Masahide Ohnishi, Tokuo Mitani, Yasunori Saeki, Osamu Ukai, Hiroyuki Department of Electrical and Electronics Engineering University of Tokushima Japan Department of Electrical and Electronic Computer Engineering Kyusyu Institute of Technology Fukuoka Japan Department of Electrical Engineering Osaka University Osaka Japan Department of System Management and Engineering Nagoya Institute of Technology Nagoya Japan

ISBN: (纸本)0780379675

Western Japan 60Hz power system is a longitudinal power system which consists of interconnected six major electric power companies. Though the power system has some interesting oscillation characteristics, there were few researches based on observation as a whole system. Authors have constructed an online global monitoring system of the power system dynamics, which is based on multiple synchronized phasor measurement technique using time stamp of the Global Positioning system (GPS) and Internet. This paper presents some results of observing system frequency oscillation and discussed the difference among the measured point. system dynamics due to the Load Frequency Control (LFC) can be extracted from observed frequency oscillations by time-frequency analysis based on the Wavelet transform. Because variations of phase difference between the interconnected two areas are closely related with tie-line power flow variations, relations between the frequency oscillations and the LFC are also investigated. © 2003 IEEE.

关键词： Synchronization

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Research on seismic signals for vehicle targets and recognition by data fusion

Research on seismic signals for vehicle targets and recognit...

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Fourth International Conference on Control and Automation

作者： Lan, Jinhui Nahavandi, Saeid Zhang, Jingxin Zheng, Hong Lan, Tian School of Engineering and Technology Deakin University Vic. 3217 Australia Department of Precision Instruments Tsinghua University Beijing 100084 China Department of Electrical and Computer System Engineering Monash University Vic. 3800 Australia Department of Electrical and Computer Engineering OGI School of Science and Engineering Oregon Health and Science University Oregon 97006 United States

ISBN: (纸本)078037777X

This paper researches seismic signals of typical vehicle targets in order to extract features and to recognize vehicle targets. As a data fusion method, the technique of artificial neural networks combined with genetic algorithm(ANNCGA) is applied for recognition of seismic signals that belong to different kinds of vehicle targets. The technique of ANNCGA and its architecture have been presented. The algorithm had been used for classification and recognition of seismic signals of vehicle targets in the outdoor environment. Through experiments, it can be proven that seismic properties of target acquired are correct, ANNCGA data fusion method is effective to solve the problem of target recognition. © 2003 IEEE.

关键词： Radar target recognition

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Dynamic analysis of facial color by using the force feedback system for virtual arm wrestling

Dynamic analysis of facial color by using the force feedback...

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IEEE/ASME International Conference on Advanced Intelligent Mechatronics

作者： Yamada, T Watanabe, T Electronic Mechanical Engineering Department Yuge National College of Maritime Technology 1000 Shimoyuge Yuge-Cho Ochigun 794-2593 Ehime Japan Faculty of Computer Science and System Engineering Okayama Prefectural University CREST Japan Science and Technology 111 Kuboki Soja 719-1197 Okayama Japan

ISBN: (纸本)0780377591

In this paper, we develop a 4-DOF force display system for the analysis by synthesis of facial color for the interaction with anthropomorphic agent. By using the system, we analyze the changes in facial skin temperature and facial color associated with circulation dynamics in response to forced actions. On the basis of the analysis, we propose a synthetic method for the affect display of virtual face with facial color and expression in force display, and the effectiveness of the method is confirmed. Finally, we develop a prototype of virtual arm wrestling system with anthropomorphic agent using synthesized dynamic three-dimensional facial color and expression.

关键词： force display facial skin temperature facial color color image processing virtual face

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Development of rehabilitation support system for reaching exercise of upper limb

Development of rehabilitation support system for reaching ex...

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IEEE International Symposium on Computational Intelligence in Robotics and Automation (CIRA)

作者： H. Maeda Y. Morita E. Yamamoto H. Kakami H. Ukai N. Matsui Department Electrical and Computer Engineering Nagoya Institute of Technology Japan Department System Management and Engineering Nagoya Institute of Technology Japan

Form the social need for aging the rehabilitation robot will be expected to become one of the most significant application fields of robotics. Although many researches have been reported in this field, there have been only a few cases of the application for the upper limbs. From these backgrounds, we have been developing a rehabilitation support system for reaching exercises of the upper limb motor function. In this paper, we introduce the rehabilitation support system, which we have developed. In this system, the exercise for the subject is accomplished as follows: A subject grasps the grip. The grip and a tracing pattern are shown on the display. Then, the subject is instructed to move the grip so as to trace the pattern while watching the display. During this operation his/her traces that are off-trace are corrected to the desired pattern by the aid of servomechanism. This function is called a motion assistance function. Through this exercise, the subject is expected to increase the reaching ability and to acquire the stable reaching motion. In order to realize this function, we proposed a control method is based on impedance control. In order to confirm the effectiveness of the proposed control method, we applied the proposed system to a healthy student before applying it to patients. Some basic experimental results show that the proposed motion control is effective to achieve the reaching exercise.

关键词： Rehabilitation robotics Motion control Medical treatment Aging Displays Control systems technology management engineering management systems engineering and theory Application software

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MMM: A stochastic mechanism for image database queries 5

MMM: A stochastic mechanism for image database queries

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5th IEEE International Symposium on Multimedia Software engineering, ISMSE 2003

作者： Shyu, M.-L. Chen, S.-C. Chen, M. Zhang, C. Shu, Chi-Min Department of Electrical and Computer Engineering University of Miami Coral GablesFL33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University MiamiFL33199 United States Department of Environmental and Safety Engineering National Yunlin University of Science and Technology Yunlin Taiwan

ISBN: (纸本)0769520316

We present a mechanism called the Markov model mediator (MMM) to facilitate the effective retrieval for content-based image retrieval (CBIR). Different from the common methods in content-based image retrieval, our stochastic mechanism not only takes into consideration the low-level image content features, but also learns high-level concepts from a set of training data, such as access frequencies and access patterns of the images. The advantage of our proposed mechanism is that it exploits the structured description of visual contents as well as the relative affinity measurements among the images. Consequently, it provides the capability to bridge the gap between the low-level features and high-level concepts. Our experimental results demonstrate that the MMM mechanism can effectively assist in retrieving more accurate results for user queries. © 2003 IEEE.

关键词： Stochastic systems

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Fault detection of non-linear systems based on multi-form quasi-armax modeling and its application to the ship benchmark 13

Fault detection of non-linear systems based on multi-form qu...

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13th IFAC Symposium on system Identification, SYSID 2003

作者： Kumamaru, K. Inoue, K. Hosoyamada, Y. Söerström, T. Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Fukuoka Iizuka820-8502 Japan Department of Automatic Control and System Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the system non-linearity is incorporated into model parameters by using non-linear non-parametric models (NNMs). Kullback discrimination Information (KDI) is introduced as fault detection index to evaluate the distortion in identified model, which is caused by a fault. The effectiveness of the method is verified through simulation studies on the ship propulsion system. © 2003 International Federation of Automatic Control.

关键词： Fault detection

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A fuzzy approach for overcurrent relays simulation

A fuzzy approach for overcurrent relays simulation

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International Conference on Computational Science, ICCS 2003

作者： Askarian Abyaneh, Hossein Kazemi Karegar, Hossein Al-Dabbagh, Majid Department of Electrical Engineering Amir Kabir University of Technology Hafez Ave No 424P.O. Box 15875-4413 Tehran Iran School of Electrical Engineering and Computer System of RMIT University MelbourneVIC3001 Australia

ISBN: (纸本)9783540401964

Accurate models for Overcurrent relays (OC) with inverse time characteristics have an important role for efficient coordination of power system protection devices. This paper proposes a new method for modelling of OC relays based on fuzzy logic. The new model is more accurate than traditional models and has been validated by comparing it with the linear and nonlinear analytical models. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Fuzzy logic

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A new and practical approach to secure mobile agent server development

A new and practical approach to secure mobile agent server d...

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IEEE Conference on Wireless Communications and Networking

作者： M.R. Razzazi J. Chamanara Software System Research and Development Laboratory Computer Engineering Department Amirkabir University of Technology슠 Tehran Iran

This paper presents a secure agent server named J-SAS. J-SAS is a secure and distributed execution environment for mobile agents. The core of the J-SAS is an agent virtual machine fulfilling the same functions as a traditional host machine. J-SAS considers the agent as an autonomous entity with execution code, state, specification and certification parts. J-SAS provides mobility, state dependency, run time code altering, and communications facilities. J-SAS consists of two main parts: agent gateway (AgG) and agent server (AgS). AgG is responsible for receiving agent through HTTP, authentication and delivering it with a passport to AgS. On the other side, AgS gets the agent, checks its passport, translates its code to safe code, initializes its state and runs it in a secure environment. Using resource allocation algorithms, ACL and authentication, J-SAS shows a good defensive mood against unauthorized read/write, denial of service and masquerading attacks.

关键词： Mobile agents Network servers Java Software systems Research and development Virtual machining Authentication Certification Mobile communication Web server

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Large deviations and deterministic measures of information

Large deviations and deterministic measures of information

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2003 European Control Conference, ECC 2003

作者： Charalambous, Charalambos D. Djouadi, Seddik M. School of Information Technology and Engineering University of Ottawa OttawaONK1N 6N5 Canada System Engineering Department University of Arkansas at Little Rock Little RockAR72204 United States Department of Electrical and Computer Engineering McGill University MontréalPQH3A 2A7 Canada

ISBN: (纸本)9783952417379

In recent years, Large Deviations theory has found important applications in many areas of engineering and science including communication and control systems. The objective of this note is to introduce and explore connections between certain fundamental concepts of Large Deviations theory and Information Theory, by introducing deterministic measures of information. The connections are established through the so-called rate functional associated with the Large Deviations principle, which lead to a natural definition of (max, plus) deterministic measure of information. © 2003 EUCA.

关键词： Information theory

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