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23th International Conference on architecture of Computing systems 2010

作者： Michael Wittke Joerg Haehner Leibniz Universität Hannover Institute of Systems Engineering System and Computer Architecture Appelstr. 4 30167 Germany

Previous work in the research field of Smart Camera (SC) networks intensively focused on algorithms for obtaining vision graphs in distributed camera networks consisting of static camera nodes. Each edge of the vision graph represents two cameras imaging a sufficiently large part of the same environment. In contrast, we propose that future SC networks will consist of static SCs, supported by mobile image providers (e.g. embedded devices equipped with image sensors such as mobile phones). Due to their mobility, location changes (especially turnings changing the direction of view) are very likely. In contrast to position changes, which can be detected by using off-the-shelf GPS sensors, turnings can only be detected by high-cost magnetic compasses. In this paper, we present a lightweight distributed algorithm for estimating turning movements based on visual sensor data and updating the system's vision graph. Our algorithm uses the optical flow as input to compute the turnings. Evaluations on a mobile image provider, consisting of an off-the-shelf embedded device equipped with an IP cam, show that our algorithm is able to estimate the angle of rotation with an accuracy of 80% and performs well in terms of CPU and memory utilization.

关键词： Cameras Accuracy Mobile communication Turning Estimation Mobile computing Image edge detection

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DCMTs: Supporting dynamically created migratory threads

DCMTs: Supporting dynamically created migratory threads

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International Conference on Computational Science and engineering

作者： Zhu, Yueting Zhang, Wu Jiang, Hai Lei, Yu Peng, Junjie Department of Computer Science and Engineering Shanghai University Shanghai China Department of Computer Science Arkansas State University Jonesboro AR United States Department of Computer Science and Engineering University of Texas Arlington TX United States Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China

ISBN: (纸本)9780769543239

Thread migration is an effective technique for fault resilience and load balancing in high performance computing. However, flexible thread migration is not easy to achieve. In this paper, we present an approach to creating migratory threads dynamically at application level. The targets must be executable source files. Compared to the static ones, the number of threads created during migration with the new scheme is independent from the context. Various thread cases are considered for migration. Thread state is handled at application level. Variables are saved in structures in C language for speedy state construction. In order to solve the inability of traditional methods in tracking the created threads, a tree of active function calls is used to record the callback. The preprocessor of the proposed one is written in YACC for accuracy and programmability. The migration enabling process is transparent to programmers with the help of the preprocess. The experimental results have demonstrated the effectiveness of this approach. © 2010 IEEE.

关键词： Fault tolerance

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Parametric search: three new applications

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中国高等学校学术文摘·数学 2010年第1期5卷 65-73页

作者： Naoki KATOH Wencheng WANG Yinfeng XU Binhai ZHU Department of Architecture and Architectural Engineering Kyoto University Nishikyo Kyoto 615-8540 Japan Institute of Software Chinese Academy of Sciences Beijing 100080 China School of Management Xi'an Jiaotong University State Key Lab for Manufacturing Systems Engineering Xi'an 710049 China Department of Computer Science Montana State University Bozeman MT 59717-3880 USA

Parametric search is a useful tool in geometric optimization. Invented by Nimrod Megiddo in 1983, it has been widely used in computational geometry. Unfortunately, this technique has rarely been used in the combinatorial optimization community in China. In this paper, we introduce parametric search via three new geometric optimization applications.

关键词： Parametric search geometric optimization facility location MSC

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A generalized file replication scheme with diffusion-based storage load balancing function in unstructured P2P file-sharing networks

A generalized file replication scheme with diffusion-based s...

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2nd International Conference on Intelligent Networking and Collaborative systems, INCOS 2010

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

ISBN: (纸本)9780769542782

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. © 2010 IEEE.

关键词： Economic and social effects

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Virtualizing modern high-speed interconnection networks with performance and scalability

Virtualizing modern high-speed interconnection networks with...

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作者： Li, Bo Huo, Zhigang Zhang, Panyong Meng, Dan National Research Center for Intelligent Computing Systems Institute of Computing Technology Chinese Academy of Sciences Beijing China Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China

ISBN: (纸本)9780769542201

As one of the most important enabling technologies of cloud computing, virtualization brings to HPC good manageability, online system maintenance, performance isolation and fault isolation. Furthermore, previous study on VMM-bypass I/O that virtualizes OS-bypass networks (e.g. Infini- Band) relieved the worry of performance degradation coming along with virtualization. In this paper, we address the scalability challenges imposed upon OS-bypass networks under virtualized environments. The eXtended Reliable Connection (XRC) transport, proposed in modern high-speed interconnection networks to address the scalability problem in large scale applications, would not work in virtualized environments. To solve the problem, we propose VM-proof XRC design to eliminate the scalability gap between virtualized and native environments. Prototype evaluation shows that the virtualization of modern high-speed interconnection networks could get the same raw performance and scalability as in native non-virtualized environment with our VM-proof XRC design. The connection memory scalability shows a potential of 16 times improvement on virtualized clusters composed of 16-core nodes. © 2010 IEEE.

关键词： Scalability

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Advanced trajectory planning for obstacle avoidance of Multiple Unmanned Marine Vehicles (MUMVs)

Advanced trajectory planning for obstacle avoidance of Multi...

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作者： Glotzbach, Thomas Alrifaee, Bassam Schneider, Matthias Jacobi, Marco Zimmermann, Armin Ament, Christoph Torre Norte - 8 Av. Rovisco Pais 1 1049-001 Lisboa Portugal 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

ISBN: (纸本)9783902661883

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. © 2010 IFAC.

关键词： Autonomous underwater vehicles

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nGFSIM : A GPU-based fault simulator for 1-to-n detection and its applications

nGFSIM : A GPU-based fault simulator for 1-to-n detection an...

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IEEE International Test Conference

作者： Huawei Li Dawen Xu Yinhe Han Kwang-Ting Cheng Xiaowei Li Department of Electrical and Computer Engineering University of California Santa Barbara USA Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy and Sciences China

We present nGFSIM, a GPU-based fault simulator for stuck-at faults which can report the fault coverage of one-to n-detection for any specified integer n using only a single run of fault simulation. nGFSIM, which explores the massive parallelism in the GPU architecture and optimizes the memory access and usage, enables accelerated fault simulation without the need of fault dropping. We show that nGFSIM offers a 25X speedup in comparison with a commercial tool and enables new applications in test selection.

关键词： Circuit faults Graphics processing unit Integrated circuit modeling Instruction sets Logic gates Computational modeling Kernel

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Multi objective optimization for piloting a Quality Management system: Study case

Multi objective optimization for piloting a Quality Manageme...

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2010 International Conference on system Science and engineering, ICSSE 2010

作者： Mahmoud, H. Ben Ketata, R. Romdhane, T. Ben Ahmed, S. Ben Dept. of Physics and Instrwnentation Engineering INSAT: National Institute of Applied Science and Technology Tunis Tunisia Dept. of Physics and Instrwnentation Engineering ICOS: Research Unit on Intelligent Control Design and Optimization of Complex System Tunis Tunisia Dept. of Physics and Instrumentation Engineering MOSIC Research Unit on Methods and Tools for Complex Computer Systems Tunis Tunisia

ISBN: (纸本)9781424464746

This paper presents a decision support tool for the effectiveness of a Quality Management system (QMS) in a company. To develop this tool, a new approach PAHP based on the combination of the Pareto Optimality Concept (Poq and the Analytical Hierarchy Process (AHP). This approach is used to model and optimize the multi-objective function of real company which presents a major problem for controlling the quality level of production. © 2010 IEEE.

关键词： Multiobjective optimization

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The portfolio analysis of electricity market with transmission constraints

The portfolio analysis of electricity market with transmissi...

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IEEE General Meeting Power& Energy Society

作者： Z. Zhou W.K. V. Chan J. H. Chow S. Kotsan Department of Decision Sciences and Engineering Systems Rensselaer Polytechnic Institute Troy NY USA Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY USA New York Independent System Rensselaer NY USA

In this paper, we define the portfolio of a generation company as the coordination of a set of generation units, which differ in production cost, capacity, and geographical location. A portfolio allows a generation company to coordinate its generators to bid strategically to earn profit more than what can be achieved without coordination. In a constrained transmission network, for example, a generation company can raise the electricity prices at a particular zone by congesting the inbound transmission lines through importing electricity from neighboring zones where other cheaper generation units of the company located. Understanding generation companies' bidding behaviors under such situation is therefore crucial to ensure market fairness. In this paper, we use an agent-based approach to model the electricity market as a multi-player game and investigate how the transmission capacity and installed capacity of generation companies affect their bidding strategies under both a monopoly market and a non-monopoly market. We demonstrate conditions under which generation companies will prefer a coordination strategy over a non-coordination one.

关键词： Generators Companies Electricity Electricity supply industry Load modeling Production ISO

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Model-Driven Security Patterns Application Based on Dependences among Patterns

Model-Driven Security Patterns Application Based on Dependen...

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International Conference on Availability, Reliability and Security, ARES

作者： Yuki Shiroma Hironori Washizaki Yoshiaki Fukazawa Atsuto Kubo Nobukazu Yoshioka Department Computer Science and Engineering WASEDA University Tokyo Japan Department Information Systems Architecture Science Research Division National Institute of Information Tokyo Japan

The spread of open-software services through the Internet increases the importance of security. A security pattern is one of the techniques in which developers utilize security experts' knowledge. Security patterns contain typical solutions about security problems. However there is a possibility that developers may apply security patterns in inappropriate ways due to a lack of consideration on dependencies among patterns. Application techniques of security patterns that consider such dependencies have not been proposed yet. In this paper, we propose an automated application technique of security patterns in model driven software development by defining applications procedures of security patterns to models as model transformation rules with consideration for pattern dependencies. Our technique prevents inappropriate applications such as the application of security patterns to wrong model elements and that in wrong orders. Therefore our technique supports developers apply security patterns to their own models automatically in appropriate ways.

关键词： Application software Information security National security Authorization Monitoring Web and internet services Programming Concrete Availability computer science

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