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International Conference on Intelligent Networking and Collaborative systems (INCOS)

作者： Masanori Takaoka Masato Uchida Yuji Oie Graduate School of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Network Design Research Center Kyushu Institute of Technology Tokyo Japan NCOS Laboratory NEC Communication Systems Kanagawa Japan

In this paper, we provide a generalized file replication scheme with a storage load balancing function in unstructured P2P file-sharing networks. The generalized file replication scheme is expressed as a weighted mixture of the concepts introduced in existing schemes. A mathematical analysis shows that the system behavior realized by the generalized file replication scheme can be described by a thermal diffusion equation composed of heat, reaction and diffusion terms, the weights of which are controlled by a parameter of the mixing rate. Here, the heat term represents a function to enhance file search performance by making replicas on specific peers. The reaction term represents a function to avoid concentrations of storage loads on specific peers. The diffusion term represents a function to uniform the storage loads among peers. The simulation results show that the generalized file replication scheme enables us to control the trade-off between search and storage load balancing performances extensively and intuitively by controlling the parameter of the mixing rate. In addition, the simulation results show that the generalized file replication scheme can adapt to dynamic P2P file-sharing environments.

关键词： Load management Mathematical model Heating Load modeling Equations Probabilistic logic Time measurement

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Advanced Trajectory Planning for Obstacle Avoidance of Multiple Unmanned Marine Vehicles (MUMVs)

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IFAC Proceedings Volumes 2010年第20期43卷 354-359页

作者： Thomas Glotzbach Bassam Alrifaee Matthias Schneider Marco Jacobi Armin Zimmermann Christoph Ament Institute for Systems and Robotics (ISR) Instituto Superior Tecnico (IST) Torre Norte – 8 Av. Rovisco Pais 1 1049-001 Lisboa Portugal (Tel: +351-21-841 8051) Institute for Automation and Systems Engineering Ilmenau University of Technology 98684 Ilmenau Germany Fraunhofer Application Center System Technology 98683 Ilmenau Germany Institute of Computer Engineering Ilmenau University of Technology 98684 Ilmenau Germany

In this paper we present our work and results in the framework of obstacle avoiding for marine vehicle teams by means of trajectory planning. Based on a team of maritime systems, such as Autonomous Underwater Vehicles (AUVs) or Autonomous Surface Vehicles (ASVs), which are intended to perform a preplanned mission in a given formation topology, methods for trajectory planning are investigated which guarantee for both obstacle-free paths and formation preservation. The proposed solution contains advanced graph search and trajectory smoothing to generate executable path for the vehicles.

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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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Dynamic property evaluations of full-scale 4-story steel frame using parallel FE-analysis

Dynamic property evaluations of full-scale 4-story steel fra...

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9th US National and 10th Canadian Conference on Earthquake engineering 2010, Including Papers from the 4th International Tsunami Symposium

作者： Kohiyama, M. Ohsaki, M. Miyamura, T. Onda, K. Isobe, D. Akiba, H. Hori, M. Kajiwara, K. Ine, T. Dept. of System Design Eng. Keio University Yokohama 223-8522 Japan Dept. of Architecture and Architectural Eng. Kyoto University Kyoto 615-8540 Japan Dept. of Computer Science College of Eng. Nihon University Koriyama 963-8642 Japan Allied Engineering Corporation Minato-ku Tokyo 105-0014 Japan Graduate School of Systems and Information Eng. University of Tsukuba Tsukuba 305-8573 Japan Earthquake Research Institute University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Hyogo Earthquake Engineering Research Center National Research Institute for Earth Science and Disaster Prevention Miki 673-0515 Japan

ISBN: (纸本)9781617388446

The project of E-Simulator is under way at Hyogo Earthquake engineering Research Center (E-Defense) of National Research institute of Earth Science and Disaster Prevention (NIED), Japan, which facilitates the world's largest shaking table. The E-Simulator uses the parallel finite element (FE) analysis software package called ADVENTYRECluster (ADVC) as a platform. In this study, we report the results of high-precision FE-analysis for simulation of collapse behavior of the 4-story steel building frame that is the specimen of the full-scale total collapse shaking-table test conducted in September 2007 at E-Defense. It is shown that elastoplastic dynamic responses can be estimated with good accuracy using a high-precision FE-analysis without resort to macro models such as plastic hinge and composite beam effect.

关键词： Finite element method

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Virtual Coach Technology for Supporting Self-Care

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Physical Medicine and Rehabilitation Clinics of North America 2010年第1期21卷 179-194页

作者： Ding, Dan Liu, Hsin-Yi Cooper, Rosemarie Cooper, Rory A. Smailagic, Asim Siewiorek, Dan Department of Rehabilitation Science and Technology University of Pittsburgh Pittsburgh PA 15260 United States Department of Veterans Affairs Human Engineering Research Laboratories VA Pittsburgh Healthcare System Pittsburgh PA 15206 7180 Highland Drive Bldg. 4 2nd Fl. East 151R1-H United States Center for Assistive Technology Pittsburgh PA 15213 200 Lothrop Street Forbes Tower Suite 3010 United States School of Computer Science Institute for Complex Engineered Systems Carnegie Mellon University Pittsburgh PA Hamburg Hall 1217 United States School of Computer Science Carnegie Mellon University Pittsburgh PA Newell-Simon Hall 3519 United States

"Virtual Coach" refers to a coaching program or device aiming to guide users through tasks for the purpose of prompting positive behavior or assisting with learning new skills. This article reviews virtual coach interventions with the purpose of guiding rehabilitation professionals to comprehend more effectively the essential components of such interventions, the underlying technologies and their integration, and example applications. A design space of virtual coach interventions including self-monitoring, context awareness, interface modality, and coaching strategies were identified and discussed to address when, how, and what coaching messages to deliver in an automated and intelligent way. Example applications that address various health-related issues also are provided to illustrate how a virtual coach intervention is developed and evaluated. Finally, the article provides some insight into addressing key challenges and opportunities in designing and implementing virtual coach interventions. It is expected that more virtual coach interventions will be developed in the field of rehabilitation to support self-care and prevent secondary conditions in individuals with disabilities. © 2010 Elsevier Inc.

关键词： Context awareness Disability Intelligent prompting Power wheelchair seating functions Preventive health management Secondary condition Self-care Virtual coach

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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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Numerical analysis of four-wave-mixing based multichannel wavelength conversion techniques in fibers

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Journal of Semiconductors 2009年第5期30卷 55-59页

作者：贾亮张帆李明刘育梁陈章渊 Optoelectronic System Laboratory Institute of SemiconductorsChinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer SciencePeking University

We numerically investigate four-wave-mixing （FWM） based multichannel wavelength conversion for amplitude-modulated signals, phase-modulated signals, together with mixed amplitude and phase modulated signals. This paper also discusses the influence of stimulated Brillouin scattering （SBS） effects on high-efficiency FWM-based wavelength conversion applications. Our simulation results show that DPSK signals are more suitable for FWM-based multichannel wavelength conversion because the OOK signals will suffer from the inevitable data- pattern-dependent pump depletion. In future applications, when the modulation format is partially upgraded from OOK to DPSK, the influence of OOK signals on the updated DPSK signals must be considered when using multi-channel wavelength conversion. This influence becomes severe with the increase of OOK channel number. It can be concluded that DPSK signals are more appropriate for both transmission and multichannel wavelength conversion, especially in long haul and high bit-rate system.

关键词： stimulated Brillouin scattering wavelength conversion four-wave mixing nonlinear optics

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Numerical analysis for four-wave mixing based wavelength conversion of differential phase-shift keying signals

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Chinese Optics Letters 2009年第7期7卷 617-620页

作者：贾亮张帆李明刘育梁陈章渊 State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences

We numerically investigate the main constrains for high efficiency wavelength conversion of differential phase-shift keying （DPSK） signals based on four-wave mixing （FWM） in highly nonlinear fiber （HNLF）. Using multi-tone pump phase modulation techniques, high efficiency wavelength conversion of DPSK signals is achieved with the stimulated BriIlouin scattering （SBS） effects effectively suppressed. Our analysis shows that there is a compromise between conversion efficiency and converted idler degradation. By optimizing the pump phase modulation configuration, the converted DPSK idler＇s degradation can be dramatically decreased through balancing SBS suppression and pump phase modulation degradation. Our simulation results also show that these multi-tone pump phase modulation techniques are more appropriate for the future high bit rate systems.

关键词： Conversion efficiency Degradation Frequency modulation Optical frequency conversion Phase shift Phase shift keying Pumps Stimulated Brillouin scattering

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Double protection charger for Li-Ion battery

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World Electric Vehicle Journal 2010年第2期4卷 379-385页

作者： Lu, Shuh-Tai Chen, Ren-Her Sie, Wun-Tong Liu, Kuen-Chi Computer Science and Information Engineering Ching Yun University No. 229 Jiansing Rd. Jhongli City Taoyuan County32097 Taiwan Chung-Shan Institute of Science and Technology Electronic Systems Research Division P.O. Box 90008-22-17 Lung-Tan Taoyuan County32599 Taiwan Chung-Shan Institute of Science and Technology System Development Center No. 566 Lane 134 Longyuan Rd. Lung-Tan Taoyuan County325 Taiwan

A low cost battery charger is introduced in this paper. The charging feature meets the requirement of a Li-Ion rechargeable cell designed for electric vehicles and manufactured by E company. The charger is capable of constant current/constant voltage charging strategy, double over current/voltage protection and automatically offloaded with a sound alarm when the charging current is smaller than about 40mA. A detail circuit diagram and its operation principle are proposed and some experimental results are also given. All devices used in the charger circuit are very common and easily purchased. Because of its simple structure only a few modifications are needed to make one's own specific charger. © 2010 WEVA.

关键词： Charging (batteries)

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Simultaneously execution of target detection, posture estimation, and tracking of 3D objects by Parametric Eigenspace Method embedded particle filter

IEEJ Transactions on Electronics, Information and Systems

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IEEJ Transactions on Electronics, Information and systems 2009年第5期129卷 838-845+10页

作者： Obata, Masayuki Nishida, Takeshi Miyagawa, Hidekazu Ohkawa, Fujio Yaskawa Information Systems Corporation 5-15 Higashiojimachi Yahatanishi-ku Kitakyushu 806-0037 Japan Faculty of Engineering Kyushu Institute of Technology 1-1 Sensui Tobata Kitakyushu Fukuoka 804-8550 Japan Faculty of Computer Science and System Engineering Kyushu Institute of Technology 680-1 Oaza Kawatsu Iizuka Fukuoka 820-8502 Japan

In this paper, an appearance based image processing method is proposed for target detection, posture estimation, and tracking of 3D objects by Parametric Eigenspace Method embedded particle filter. In this method, the computational cost of Parametric Eigenspace Method and the tracking error can be greatly reduced by using the outputs of previous time and the preliminary knowledge of dynamics of movement of targets for a particle filter. Namely, since the particles of the particle filter can be generated in the direction where the object will be moved by using the posture estimated by Parametric Eigenspace Method for the prediction model, the accuracy of the state estimation of the object can be improved without increasing the number of particles. Therefore, the proposed method uses output result of Particle Filters and Parametric Eigenspace Method recursively and mutually for fast simultaneous execution of detection, posture estimation, and tracking of the targets. Furthermore, we demonstrate validity of our approach by several experiments. © 2009 The institute of Electrical Engineers of Japan.

关键词： Target tracking

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