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IEEE General Meeting Power& Energy Society

作者： Pyeong-Ik Hwang Seon-Ju Ahn Seong-Il Hur Yong-Tae Yoon Seung-Il Moon School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea School of Electrical Engineering Myongji University Gyeonggi South Korea Information Technology Department Power System Operation Division Korea Power Exchange Seoul South Korea

Because it is almost impossible to train the dispatchers with real power system, the dispatcher training simulator (DTS) is used for the training. Among various components of the DTS, the power system model (PSM) emulates the dynamic behavior of the power system to calculate the frequency and voltage. In the PSM, the power plants are modeled as differential equations, so the mechanical power of the power plants is calculated by the numerical methods. Conventionally, the fixed step-size algorithm has been used in the PSM, however it has some drawbacks. This paper develops the prototype PSM using the Matlab, and analyzes the problems of the fixed step-size algorithm by comparing the results with those of PSCAD simulation considered as a real system. In order to overcome the limitations, the adaptive step size method for the PSM is proposed by modifying the general adaptive step size method. From the simulation using the proposed method, it is verified that the accuracy of the PSM is increased.

关键词： Load modeling Power system dynamics Prototypes Power generation Numerical models Topology

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The InterMedia networking and security architecture for user centric multimedia convergence

The InterMedia networking and security architecture for user...

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International Symposium on Performance Evaluation of computer & Telecommunication systems SPECTS

作者： Matteo Repetto Riccardo Rapuzzi Stefano Chessa Stefano Lenzi John Gialelis Tasos Fragopoulos Consorzio Nazionale Interuniversitario per le Telecomunicazioni Parma Italy Department of Communication Computer and System Science (DIST) University of Genoa Italy CNR (ISTI-CNR) Instituto di Scienza e Tecnologie dell'Informazione France Computer Science Department University of Pisa Pisa Italy Industrial Systems Institute University of Patras Greece Electrical Engineering Department University of Patras Greece

The InterMedia project aims at progressing towards user-centric convergence of multimedia, by putting the user at the center of services (multimedia applications), devices and interfaces for the interaction. One of the main implications of the user-centric approach is the seamless and secure access to content, regardless of the users' location and terminal device(s), which requires suitable solutions to manage mobility, context-awareness and digital rights. Under this respect this paper reviews the mechanisms developed within InterMedia to support the above issues, and discusses their integration in a common networking framework addressing a generic scenario for content access.

关键词： Sensors Context Licenses Multimedia communication Protocols Servers Transform coding

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Case Studies on Transition Fault Test Generation for At-speed Scan Testing

Case Studies on Transition Fault Test Generation for At-spee...

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IEEE International Symposium on Defect and Fault Tolerance in VLSI systems

作者： Nor Azura Zakaria Edward V. Bautista Jr. Suhaimi Bahisham Jusoh Weng Fook Lee Xiaoqing Wen Microelectronics Technology Realisation and Operations MIMOS Berhad Kuala Lumpur Malaysia Emerald Systems Design Center Penang Malaysia Department of Creation Informatics Graduate School of Computer Science & System Engineering Kyushu Institute of Technology Iizuka Japan

At-speed scan testing for intra-clock and inter-clock transition delay faults in a SOC design with multiple clock domains is an important and challenging issue. Current practice in industry usually applies a test scheme targeted on intra-clock transition fault delay testing (i.e., intra testing). In this paper a test scheme targeting both intra-clock and inter-clock domains for transition delay fault testing (i.e., intra-inter testing) is applied. This paper presents an empirical study by comparing between intra testing and intra-inter testing in terms of fault classification, test detection, test coverage, test volume, and test power by using industrial circuits. The information provided by this paper is beneficial to both practitioners and researchers in their pursuit of improving the quality of transition delay testing, which is critical to the quality of deep-sub micron VLSI chips.

关键词： Clocks Circuit faults Delay Synchronization Logic gates Automatic test pattern generation

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Enhance Information Flow Tracking with Function Recognition

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China Communications 2010年第6期7卷 24-29页

作者： Zhou Kan Huang Shiqiu Huang Shan Qi Zhengwei Gu Jian Guan Haibing School of software Shanghai Jliao Tong University Shanghai 200240 P. R. China Key Lab of Information Network Security Ministry of Public Security Department of Computer Science ＆ Engineering Shanghai Jiao Tong University Shanghai 200240 P. R China Shanghai Key Laboratory of Scalable Computing ＆ System Shanghai P. R. China

With the spread use of the computers, a new crime space and method are presented for criminals. Thus computer evidence plays a key part in criminal cases. Traditional computer evidence searches require that the computer specialists know what is stored in the given computer. Binary-based information flow tracking which concerns the changes of control flow is an effective way to analyze the behavior of a program. The existing systems ignore the modifications of the data flow, which may be also a malicious behavior. Thus the function recognition is introduced to improve the information flow tracking. Function recognition is a helpful technique recognizing the function body from the software binary to analyze the binary code. And that no false positive and no false negative in our experiments strongly proves that our approach is effective.

关键词： function recognition information flow tracking program behavior e-evidence.

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Adoption Framework Expansion based on the computer Ethics' Related Research Models and Ethical Scenarios Analysis

Adoption Framework Expansion based on the Computer Ethics' R...

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2010 International Conference on Economics, Business and Management（ICEBM2010）

作者： Hamed Taherdoost Neda Jalaliyoon Meysam Namayandeh Arash Forghani Mazdak Zamani Department of Computer Islamic Azad University Islamshahr Branch TehranIran Department of Management Islamic Azad University Semnan Branch SemnanIran Centre for Advanced Software Engineering Universiti Teknologi Malaysia Kuala Lumpur Malaysia Department of Engineering Islamic Azad University Tehran Branch TehranIran Faculty of Computer Science and Information System Universiti Teknologi Malaysia Kuala Lumpur Malaysia

Information security and computer ethics are one of the foremost integration of current computer scientist in cyber ***,at the same time computer technology may raise some unethical issues with current life style and *** the general public becomes increasingly computer literate,the gap between technology and peoples' mental power notably shrinks and this gap fulfillment may not be possible unless by educating the students from the basic level of certain ethical *** the other hand,understanding the factors that influence user acceptance of information technology is vital for further development of any technology and smart card technology as *** the customers ethical and intentional behavior to use information technology should be the key element in the decision-making *** purpose of this study is to develop a model for smart card acceptance from ethical ***,a new method of real time scenario is introduced to identify personal understanding of ethical circumstances by using smart cards.

关键词： computer Ethics Smart Card,Acceptance Information Technology(IT)

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Computationally efficient, approximate moving horizon state estimation for nonlinear systems

Computationally efficient, approximate moving horizon state ...

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作者： Alessandri, A. Baglietto, M. Battistelli, G. Zavala, V. Department of Production Engineering Thermoenergetics and Mathematical Models DIPTEM University of Genoa P.le Kennedy Pad. D 16129 Genova Italy Department of Communications Computer and System Sciences DIST University of Genoa Via Opera Pia 13 16145 Genova Italy Dipartimento di Sistemi e Informatica Università degli Studi di Firenze Via di S. Marta 3 50139 Firenze Italy Mathematics and Computer Science Division Argonne National Laboratory 9700 South Cass Ave Bldg. 240 Argonne IL 60439 United States

ISBN: (纸本)9783902661807

Moving horizon estimation for discrete-time nonlinear systems is addressed by using fast optimization algorithms for which stability results under general conditions are ensured. The solution of the on-line moving horizon estimation problem is obtained by using the sampling time to solve a reference problem with model-predicted measurements while waiting for the next measurement. In order to correct the resulting solution, a quick nonlinear programming sensitivity calculation is accomplished as soon as the new measurement becomes available. The stability properties of such moving horizon estimation algorithm is proved under general conditions, which make the overall approach suitable for real settings with strong nonlinearities. © 2010 IFAC.

关键词： Nonlinear programming

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Proposal and evaluation for wireless sensor network which use terminal that eliminated receiver circuit

Proposal and evaluation for wireless sensor network which us...

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International Conference on Ubiquitous and Future Networks, ICUFN

作者： Hiroaki Nose Kazumasa Mizuta Hisayoshi Kunimune Miao Bao Masaaki Niimura Yasushi Fuwa Yasushi Yoshikawa Department of Computer and System Engineering Nagano Prefectural Institute of Technology Ueda Japan Graduate School of Science and Technology Shinshu University Nagano Japan Epson Toyocom Corporation Hino Japan Seiko Epson Corporation Suwa Japan Faculty of Engineering Shinshu University Nagano Japan

Sensor network terminals are installed in large numbers in the field and transmit data periodically by radio. Such terminals must be miniaturized, and save power so that each device can operate by battery for several years. As one way to satisfy these two conditions, in this research we propose a terminal design which eliminates the receiver circuit. Because there is no receiver circuit, circuitry can be miniaturized, and power can be saved because there is no need to consume power to receive signals. However, the terminals cannot perform carrier detection and reception acknowledgement because there is no receiver circuit. We propose following two new protocols to solve this problem.

关键词： Protocols Receivers Delay Power demand Zigbee Data models

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Dynamic modeling and tracking control of fuel filled space robotic system with flexible manipulators

Dynamic modeling and tracking control of fuel filled space r...

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International Symposium on systems and Control in Aerospace and Astronautics (ISSCAA)

作者： Xinxin Yang Xiong Luo Fuchun Sun Fengge Wu Huaping Liu School of Information Engineering Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing Beijing China State Key Laboratory of Intelligent Technology and System Department of Computer Science and TechnologyTsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China

In recent years, dynamics model and control of space robot system are the hot topics in the research field. In this paper, a new dynamics model and control strategy of space robotic system with a flexible manipulator and a liquid fuel tank are investigated. Based on Lagrange equation method, the dynamics model of the space robotic system coupling with liquid sloshing, flexibility vibration and base movement is derived. The elastic deflection of the flexible manipulator is described by the assumed mode method and equivalent mechanical model is adopted instead of liquid sloshing under the environment of low-gravity. The inverse dynamics control algorithm combined with PD control method is performed to solve the trajectory tracking problem. Some simulation results are given to verify the effectiveness of the proposed method.

关键词： Mathematical model Aerospace electronics Manipulator dynamics Equations Space vehicles

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Fuzzy dynamic characteristic modeling and intelligent adaptive control for complex spacecraft

Fuzzy dynamic characteristic modeling and intelligent adapti...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Xiong Luo Song Hu Zengqi Sun Xintao Qiu School of Information Engineering Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology Beijing Beijing China State Key Laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China

Because of strong coupling, nonlinear, and time-varying characteristics, it is difficult to control complex spacecraft. By means of combining with controlled object dynamics and performance requirements, characteristic modeling and control approach is an effective way to solve this problem. Aimed at the flexible satellites described by using characteristic modeling approach, with the help of fuzzy rules, fuzzy dynamic characteristic modeling method and intelligent adaptive controller are designed to control this complex spacecraft. Meanwhile, based on the satellite system simulation platform, we validate the correctness and efficiency of the proposed modeling and control method by comparing with the simulation results of the other similar methods.

关键词： Adaptation model Laboratories Satellites Space vehicles Intelligent control Artificial intelligence Information science

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Passive Doppler Synthetic Aperture Radar Imaging

Passive Doppler Synthetic Aperture Radar Imaging

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8th European Conference on Synthetic Aperture Radar

作者： Ling Wang Can Evren Yarman Birsen Yaz?c? College of Information Science and Technology Nanjing University of Aeronautics and Astronautics 210016 China Houston Technology Center WesternGeco Schlumberger TX 77042 USA Department of Electrical Computer and System Engineering Rensselaer Polytechnic Institute Troy NY 12180 USA

In this paper we consider passive airborne receivers that use backscattered signals from sources of opportunity transmitting fixed-frequency waveforms. Due to its combined passive synthetic aperture and the fixed-frequency nature of the transmitted waveforms, we refer to the system under consideration as Doppler Synthetic Aperture Hitchhiker (DSAH). We present a novel image formation method for DSAH. Our method first correlates the windowed signal obtained from one receiver with the windowed, filtered, scaled and translated version of the received signal from another receiver. This processing removes the transmitter related variables from the phase of the Fourier integral operator that maps the radiance of the scene to the correlated signal. We next use the microlocal analysis to reconstruct the scene radiance by the weighted-backprojection of the correlated signal. This imaging algorithm can put the visible edges of the scene radiance at the correct location, and under appropriate conditions, with correct strength. We show that the resolution of the image is directly related to the length of the support of the windowing function and the frequency of the transmitted waveform.

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