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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2011年 6582卷 428-446页

作者： Foster, Howard Mukhija, Arun Rosenblum, David S. Uchitel, Sebastian London Software Systems Dept. of Computing Imperial College London 180 Queen's Gate London SW7 2BZ United Kingdom London Software Systems Dept. of Computer Science University College London Gower Street London WC1E 6BT United Kingdom

ISBN: (纸本)9783642204005

A Service-Oriented Computing (SoC) architecture consists of a number of collaborating services to achieve one or more goals. Traditionally, the focus of developing services (as software components) has been on the static binding of these services within a single context and constrained in an individual manner. However, service architectures should be dynamic, where service binding and context changes with environmental changes. The task of designing and analysing such architectures becomes very complex. In this chapter we discuss a specification profile and analysis framework for service modes. A service mode provides an encapsulation of both specification and adaptation in different service scenarios. The approach is implemented as a tool suite and integrated into the Eclipse IDE. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Specifications

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Runtime support for dynamic and adaptive service composition

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2011年 6582卷 585-603页

作者： Mukhija, Arun Rosenblum, David S. Foster, Howard Uchitel, Sebastian London Software Systems Dept. of Computer Science University College London Gower Street London WC1E 6BT United Kingdom London Software Systems Dept. of Computing Imperial College London 180 Queen's Gate London SW7 2BZ United Kingdom

ISBN: (纸本)9783642204005

The ability to dynamically compose autonomous services for optimally satisfying the requirements of different applications is one of the major advantages offered by the service-oriented computing (SOC) paradigm. A dynamic service composition implies that services requesters can be dynamically bound to most appropriate service providers that are available at runtime, in order to optimally satisfy the service requirements. At the same time, the autonomy of services involved in a composition means that the resulting composition may need to be adapted in response to changes in the service capabilities or requirements. Naturally, the infrastructure and technologies for providing runtime support for dynamic and adaptive composition of services form the backbone of the above process. In this chapter, we describe the Dino approach for providing the runtime support for dynamic and adaptive service composition. The Dino approach provides comprehensive support for all stages of a service composition life-cycle, namely: service discovery, selection, binding, delivery, monitoring and adaptation. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Quality of service

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Cost Analysis of Optimized Fast Mobile IPv6 in WiMAX Network

Cost Analysis of Optimized Fast Mobile IPv6 in WiMAX Network

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2011 International Conference on Future Information Technology (ICFIT 2011)

作者： Seyyed Masoud Seyyedoshohadaei Borhanuddin Mohd Ali Sabira Khatun Dept. of Computer & Communication System Eng. Universiti Putra Malaysia (UPM) Malaysia Faculty of Computer Systems & Software Eng. Universiti Malaysia Pahang (UMP) Malaysia

Micro mobility in WiMAX is defined in IEEE802.16e standard. Fast Mobile IPv6 has been used as an IP layer protocol to support macro mobility in WiMAX network. The issue of how to apply IP layer protocol over IEEE802.16e to support seamless communication for real-time applications and high speed users remains an important challenge in mobility management. In this paper an analytical model is developed to evaluate total cost consisting of signaling and packet delivery costs of optimized fast handover scheme （OFHS） compared with RFC5270. In RFC5270, FMIPv6 has been used over IEEE802.16e protocol to support intra domain handover. OFHS uses function optimization, cross layer design and a multi pre- established tunnels concept to reduce handover latency of RFC5270. Results show that the OFHS increases probability of predictive mode compared with RFC5270 due to smaller handover latency. Even though OFHS needs extra signalling to pre-establish multi tunnel it has less total cost thanks to its optimized algorithm.

关键词： fast mobile IPv6 handover IEEE802.16e packet delivery cost signaling cost

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Optimized distributed self-organizing control for coordinated traffic signal in Jakarta

Optimized distributed self-organizing control for coordinate...

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International Symposium on Micromechatronics and Human Science (MHS)

作者： Adi Wibowo W. Jatmiko T. Fukuda K. Sekiyama Faculty of Computer Science Universitas Indonesia Dept. Informatics Diponegoro University Faculty of Computer Science Universitas Indonesia Indonesia Dept. Of Micro-Nano Systems Engineering Nagoya University Japan

One of the important critical traffic controller challenges is the management of multi-intersection networks and real-time control system. In this paper, we develop a coordinated traffic signal control system based on a distributed self-organizing control. We propose a new modeling methodology which deals with left-right turns based on traffic signal phasing, multiway intersection and fuzzy logic to adapt the alternation of saturation flow in self-organizing control. We design a simulation which can generate real-time traffic flow sequence. Results show that the performance of the proposed traffic controller is better than the method in conventional traffic or previous model.

关键词： Roads

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A digraph model for risk identification and mangement in SCADA systems

A digraph model for risk identification and mangement in SCA...

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IEEE International Conference on Intelligence and Security Informatics, ISI

作者： Jian Guan James H. Graham Jeffrey L. Hieb Department of Computer Information Systems University of Louisville USA KY USA Department of Electrical and Computer Engineering University of Louisville Louisville KY USA Dept. of Electrical and Computer Engineering Louisville KY USA Dept. of Engineering Fundamentals University of Louisville Louisville KY USA

Supervisory control and data acquisition (SCADA) systems are critical to today's industrial facilities and infrastructures. SCADA systems have evolved into large and complex networks of information systems and are increasingly vulnerable to various types of cyber-security risks. Identifying and managing risks in SCADA systems has become critical in ensuring the safety and reliability of these facilities and infrastructures. Most of the existing research on SCADA risk modeling and management has focused on probability-based or quantitative approaches. While probabilistic approaches have proven to be useful, they also suffer from common problems such as simplifying assumptions, large implementation costs, and inability to completely capture all the important aspects of risk. This paper proposes a digraph model for SCADA systems that allows formal, explicit representation of a SCADA system. A number of risk management methods are presented and discussed for a SCADA system based on the proposed model. The methods are applied to a chemical distillation application as a case study, and shows promising initial results in identifying areas of system vulnerability.

关键词： Internet Reliability SCADA systems Wide area networks

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Methods for the EEG hyperscanning. Simultaneous recordings from multiple subjects during social interaction

Methods for the EEG hyperscanning. Simultaneous recordings f...

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International Symposium on Noninvasive Functional Source Imaging of The Brain and Heart

作者： Astolfi, L. Toppi, J. Cincotti, F. Mattia, D. Salinari, S. De Vico Fallani, F. Wilke, C. Yuan, H. He, B. Babiloni, F. Dept. of Computer Science and Systems Univ. of Rome Sapienza Rome Italy Dept. of Physiology and Pharmacology Univ. of Rome Sapienza Rome Italy IRCCS Fondazione Santa Lucia Rome Italy Department of Biomedical Engineering University of Minnesota Minneapolis MN United States Center for Neuroengineering University of Minnesota Minneapolis MN United States

ISBN: (纸本)9781424482818

In this paper we show how the possibility of recording simultaneously the cerebral neuroelectric activity in different subjects (EEG hyperscanning) during the execution of different tasks can return useful information about the "internal" cerebral state of the subjects. We present the results obtained by EEG hyperscannings during ecological task (such as the execution of a card game) as well as those obtained in couples of subjects during the performance of the Prisoner's Dilemma Game. The simultaneous recordings of couples of interacting subjects allows to observe and to model directly the neural signature of human interactions in order to understand the cerebral processes generating and generated by social cooperation or competition. Results obtained in a study of different groups recorded during the card game revealed a larger activity in prefrontal and anterior cingulated cortex in different frequency bands for the player that leads the game when compared to other players. Results collected in a population of 10 subjects during the performance of the Prisoner's Dilemma suggested that the most consistently activated structure is the orbitofrontal region (roughly described by the Brodmann area 10) during the condition of competition in both the tasks. It could be speculated whether the pattern of cortical connectivity between different cortical areas in different subjects could be employed as a tool for assessing the outcome of the task in advance. © 2011 IEEE.

关键词： Game theory

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Modularized Design Consideration of a General-Purpose, High-Speed Phase-Leg PEBB Based on SiC MOSFETs

Modularized Design Consideration of a General-Purpose, High-...

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CPES Annual Power Electronics Conference

作者： Zheng Chen Milisav Danilovic Dushan Boroyevich Zhiyu Shen CENTER FOR POWER ELECTRONICS SYSTEMS (CPES) The Bradley Dept. of Electrical and Computer Engineering Virginia Polytechnic Institute and State University

ISBN: (纸本)9781612841670

This paper presents the modularized design and analysis of a phase-leg module based on the Power Electronics Building Block (PEBB) concept. 1200 V SiC MOSFETs and Schottky diodes are used as the main switches for the phase-leg to be used in 600 to 800 V, medium-power converters. The design aims at generalizing the module for various circuit topologies through smart control scheme, while the device switching speed is also pushed to the limit through optimized gate driver and circuit layout designs in order to achieve the high-frequency operation capability of the PEBB.

关键词： Device application Silicon Carbide (SiC) MOSFET High frequency power converter design consideration PEBB SILICON CARBIDE Power electronics Modularity master switches SUB-SYSTEM

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Fractional Gain Scheduled Controller for a Networked Smart Wheel: Experimental Results

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IFAC Proceedings Volumes 2011年第1期44卷 15043-15048页

作者： Inés Tejado Blas M. Vinagre YangQuan Chen Industrial Engineering School University of Extremadura 06006 Badajoz Spain Center for Self-Organizing and Intelligent Systems Dept. of Electrical and Computer Engineering Utah State University 84322 Logan UT USA

Abstract The performance of Networked Control systems (NCS) is directly affected mainly by time-varying network delays, so a specific approach to compensate their effects is usually required during the controller design process. This paper deals with the control of an experimental platform over the Internet by applying a novel fractional gain scheduling strategy which enables an existing fractional order PI controller for efficient control over the network. The proposed controller introduces delay-adaptive gains, which are optimal with respect to the current network condition. Experimental results show the effectiveness of the proposed controller, providing significantly better system performance, especially when the network-induced delay is increased in certain circumstances.

关键词： Networked control system Gain scheduling Variable delay Fractional order PI controller SmartWheel NCS testbed

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Adiabatic coupling into Terahertz parallel-plate waveguides

Adiabatic coupling into Terahertz parallel-plate waveguides

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2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011

作者： Theuer, Michael Shutler, Alisha J. Harsha, S. Sree Beigang, René Grischkowsky, Daniel R. University of Kaiserslautern Dept. of Physics Building 56 Erwin-Schroedinger-Str. 67663 Kaiserslautern Germany School of Electrical and Computer Engineering Oklahoma State University Stillwater OK 74078 United States Fraunhofer Institute for Physical Measurement Techniques IPM Dept. of Terahertz Measurement and Systems Building 56 Erwin-Schroedinger-Str. 67663 Kaiserslautern Germany

ISBN: (纸本)9781424451173

We report on the coupling process of broadband terahertz radiation into metal parallel-plate waveguides with sub-wavelength gaps. Starting from well known quasi-optic coupling using silicon lenses, we developed a coupling scheme based on adiabatic coupling using metal flares. The metal surfaces change their shape slowly and smoothly with respect to the wavelength of terahertz radiation (300 μm). The undistorted pulse shape and dispersion-free propagation is maintained in the TEM geometry. The obtained coupling efficiencies for different waveguide geometries exceed previous values. For an optimized layout, also spectroscopic results of polycrystalline molecular samples are presented revealing high resolution absorption lines. © 2011 IEEE.

关键词： Terahertz waves

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Modeling, Simulation and Control of a Spincopter

Modeling, Simulation and Control of a Spincopter

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2011 IEEE International Conference on Robotics and Automation(2011年IEEE世界机器人与自动化大会 ICRA 2011)

作者： M. Orsag S. Bogdan T. Haus M. Bunic A. Krnjak Laboratory for Robotics and Intelligent Control Systems - LARICS Dept. of Control and Computer EngineeringFaculty of Electrical Engineering and ComputingUniversity of ZagrebZagrebCroatia

In this article we present a mathematical model of a spincopter -an inherently stable and easy to control unmanned aerial vehicle (UAV). Although the devised model represents only the first approximation of spincopter's physics, it captures basic phenomena that are sufficient for derivation and testing of a simple control algorithm. Results obtained by simulations in Simulink presented herein, demonstrate efficient performance of the proposed simple controller structure. Further tests, including investigation of complex aerodynamics effects and hardware-specified limitations, have been done using X-Plan software package. Finally, the proposed controller has been tested experimentally. Both, Xplane and experimental results confirmed the outcome from Simulink.

关键词： Aircraft Mathematical model Engines Propellers Force Atmospheric modeling

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