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检索条件"任意字段=First IEEE International Conference on Distributed Computing in Sensor Systems, DCOSS 2005"

共 1159 条记录，以下是1011-1020 订阅

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2-state alternator for uniform rings with arbitrary size

2-state alternator for uniform rings with arbitrary size

引用

19th international conference on Advanced Information Networking and Applications, AINA 2005

作者： Liu, Tzong-Jye Lee, Chia-Lin Department of Information Engineering and Computer Science Feng Chia University Taiwan 407 Taiwan

ISBN: (纸本)0769522491

In the paper, we propose a two-state alternator algorithm for uniform rings with n processors, where n is any positive integer. Gouda and Haddix defined the concept of the alternator. It discusses a set of concurrent processors, which satisfies the following conditions. (1) If one processor executes the critical phase, no neighbor of the processor executes the critical phase in the same computing phase. (2) Along any infinite computing phases, each processor executes the critical phase infinitely often. (3) An alternator is self-stabilizing to the above conditions. The proposed algorithm achieves the maximal performance in the sense that no additional processor can execute the critical phase without violating the first condition of the alternator. The proposed alternator algorithm has the snap property. It always satisfies condition (1) even when some transient faults occur. The proposed algorithm allows each processor to execute the critical phase every three phases in the worst case. It includes an expected number of log(n) phases and a deterministic number of O((n-2)/2) to achieve the maximal performance. © 2005 ieee.

关键词： distributed computer systems

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Improving searching performance based on semantic correlativity in Peer to peer network

Improving searching performance based on semantic correlativ...

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1st international conference on Semantics, Knowledge and Grid, SKG 2005

作者： Li, Zhichao He, Pilian Li, Feng Lei, Ming School of Electronic Information Engineering Tianjin University Tianjin 300072 China Baicheng Works University Baicheng China

ISBN: (纸本)0769525342

Most existing Peer-to-peer (P2P) systems support only title-based searches, which can not satisfy the content searches. In this paper, we proposed a semantic correlativity model which can support semantic content-based searches. firstly, using VSM to represent content and using KNN algorithm to implement self-clustering. Secondly, based on framework, accessing to compute semantic similarity, SCRA policy is proposed to improve routing performance with prefetch technology. By this model, routing overhead can be greatly reduced. At last, preliminary simulation results show that SCRA achieves a great routing performance over the previous algorithms. © 2006 ieee.

关键词： distributed computer systems

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A Grid resource discovery method under the circumstances of heterogeneous ontologies

A Grid resource discovery method under the circumstances of ...

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1st international conference on Semantics, Knowledge and Grid, SKG 2005

作者： Chen, Tingwei Zhang, Bin Hao, Xianwen Zheng, Haidong Institute of Computer and Application Northeastern University 110004 China

ISBN: (纸本)0769525342

In this paper we presented a novel approach to semantic resource discovery in the Grid, Where different organizations may use different ontologies to describe the resource and application requirements. We do not require a central ontology for resource description and matching. The relation matrix is defined to describe relations between concepts in any two ontologies. Then, a method of rewriting resource queries based on the relation matrix is presented to solve the ontology heterogeneity problem. It rewrites the resource queries in one ontology to approximate queries in another ontology based on the relations between concepts. Machines can process this procedure automatically. © 2006 ieee.

关键词： distributed computer systems

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Construction of overlay network in P2P-based resource discovery model in grid environment

Construction of overlay network in P2P-based resource discov...

引用

1st international conference on Semantics, Knowledge and Grid, SKG 2005

作者： Dong, Xiaoshe He, Xiuqiang Guo, Hua Li, Wancheng Zhang, Xingjun School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an 710049 China

ISBN: (纸本)0769525342

Peer-to-Peer (P2P) computing can be integrated into the resource discovery of grid system to resolve the problems incurred by the centralized mechanisms. The overlay network construction is an important issue in the P2P -based resource discovery systems. The traditional Gnutella-like method to construct the overlay network cannot guarantee the full connection of the overlay network. This paper proposes the OFM (Order firstly Mode) technology. OFM builds an efficient overlay network by actually measuring the network delay among the grid nodes. Moreover a strategy namely the key-node-sharing used in the organizing and managing the overlay network is proposed to improve the scalability of OFM. The OFM can guarantee any two nodes that may be connected directly or indirectly, and the request can be delivered along the overlay network efficiently. The efficiency of the resource discovery service based on the model can be therefore improved greatly. © 2006 ieee.

关键词： distributed computer systems

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2nd international Symposium on Parallel and distributed Processing and Applications, ISPA 2004

引用

2nd international Symposium on Parallel and distributed Processing and Applications, ISPA 2004

ISBN: (纸本)9783540241287

The proceedings contain 119 papers. The special focus in this conference is on Parallel and distributed Processing and Applications. The topics include: Present and future supercomputer architectures;challenges in P2P computing;multihop wireless Ad Hoc networking: current challenges and future opportunities;an inspector-executor algorithm for irregular assignment;multi-grain parallel processing of data-clustering on programmable graphics hardware;a parallel reed-solomon decoder on the imagine stream processor;asynchronous document dissemination in dynamic Ad Hoc networks;location-dependent query results retrieval in a multi-cell wireless;an efficient mobile data mining model;towards correct distributed simulation of high-level petri nets with fine-grained partitioning;m-guard: a new distributed deadlock detection algorithm based on mobile agent technology;meta-based distributed computing framework;locality optimizations for jacobi iteration on distributed parallel;fault-tolerant cycle embedding in the WK-recursive network;RAIDb: redundant array of inexpensive databases;a fault-tolerant multi-agent development framework;a fault tolerance protocol for uploads: design and evaluation;topological adaptability for the distributed token circulation paradigm in faulty environment;adaptive data dissemination in wireless sensor networks;design and analysis of a k-connected topology control algorithm for Ad Hoc networks;on using temporal consistency for parallel execution of real-time queries in wireless sensor systems;cluster-based parallel simulation for large scale molecular dynamics in microscale thermophysics;parallel checkpoint/recovery on cluster of IA-64 computers;an enhanced message exchange mechanism in cluster-based mobile;a scalable low discrepancy point generator for parallel computing;generalized trellis stereo matching with systolic array.

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sensor inter-vehicle communication for safer highways

Sensor inter-vehicle communication for safer highways

引用

19th international conference on Advanced Information Networking and Applications

作者： Durresi, M Durresi, A Barolli, L Franklin Univ Columbus OH 43215 USA

ISBN: (纸本)0769522491

In this paper we present a sensor inter-vehicle communication protocol based on geographical routing. sensors installed in cars continuously gather important information about: air bags, distance detection, mechanical and electronic parts, tire pressure, collision force, direction of impact and the car and its passengers' conditions. Our proposed protocol enables transmission of these information on point-to-point communications between cars in highway. The protocol is designed for highway travelers but can be used in any mobile ad-hoc network. The highway is divided in virtual cells, which moves as the vehicles moves. The cell members choose a center that will behave for a certain time interval as a Base Station. Every node has its geographical position given by Global Positioning System (GPS). When a source node has a message for a destination node, forwards it to its Cell Center Then the message is forwarded through the other Cell Centers. The Cell Centers first verifies if the destination node belongs to their cell. Finally the destination Cell Center will send the message to the destination node. Our simulation results show that our proposed protocol improves the network utilization compared to existing inter-vehicles protocols. The protocol can be used to implement differentiated mobile services and message prioritization. Through simulation evaluations, we show that our protocol is very scalable and reduces the latency compared existing solutions.

关键词： Intelligent vehicle highway systems

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Increasing attack resiliency of wireless ad hoc and sensor networks

Increasing attack resiliency of wireless ad hoc and sensor n...

引用

international conference on distributed computing systems Workshop

作者： H. Vogt Department of Computer ETH Zurich Switzerland

An ad hoc or sensor network that is employed for security sensitive applications is expected to tolerate a certain quantity of maliciously behaving nodes. Algorithms must be designed in a way to withstand attacks such as manipulation and injection of messages. End-to-end security mechanisms, albeit desirable, are generally too costly with regard to the limited computational resources available in sensor networks. We propose and evaluate a robust, scalable scheme for interleaved message authentication, which approximates security guarantees of end-to-end schemes.

关键词： Wireless sensor networks Routing Protection Communication system security Computer networks Robustness Message authentication distributed computing Computer science Computer security

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Long-distance fiber bragg grating sensor system based on hybrid Raman/Erbium-Doped fiber amplification

Long-distance fiber bragg grating sensor system based on hyb...

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17th international conference on Optical Fibre sensors

作者： Ran, ZL Rao, YJ Nie, N Chen, RR Univ Elect Sci & Technol China Sch Commun & Informat Engn Chengdu 610054 Sichuan Peoples R China

ISBN: (纸本)0819458554

In this paper, a hybrid Raman and Erbium-doped fiber amplifier (Raman/EDFA) is first proposed for enhancement of the performance of long-distance fiber Bragg grating (FBG) sensor systems. The Raman fiber amplifier is used for achieving low-noise amplification of FBG signals while the EDFA arranged remotely is used for both the compensation of the fiber loss due to long-distance transmission and the illumination of remotely-located FBG sensors as a broadband source by using the residual Raman pump power to generate ASE light and by amplifying the transmission light of the FBGs located before the EDFA. Such a sensor system adopts the advantages of the low noise feature of the distributed Raman amplifier and the high small-signal gain of the EDFA. Experimental results show that the performance of the sensor system has been improved significantly. A signal-to-noise ratio (SNR) of similar to 13dB has been achieved for a 50km transmission distance, which is similar to 10dB higher than that without amplification.

关键词： optical fiber sensors Raman fiber amplifier Erbium-doped fiber amplifier (EDFA) fiber Bragg grating (FBG) sensors long-distance measurement

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distributed parallelism using clusters with dynamic behavior (non-refereed)

Distributed parallelism using clusters with dynamic behavior...

引用

ieee Southeastcon 2005: Excellence in Engineering, Science and Technology

作者： Khan, Md. Sirajul Alam Chowdhury, Md. Nazibul Haque Hoque, Md. Ashraful Khan, Md. Zahedul Alam Dept. of Electrical and Electronic Engineering Rahshahi University of Engineering and Technology Rajshahi Bangladesh Dept. of Computer Engineering American International University-Bangladesh Bangladesh

This paper presents a technique to design and develop a distributed parallel cluster on a client-server network environment to implement parallelism and hence increase the efficiency of a system. A client-server network has been established first. Then necessary packages for cluster management have been installed and configured on the established network environment. Programs run able on the developed environment must follow parallel algorithm properties with selected cluster nodes. Any program is distributed module-wise to run on different nodes simultaneously. Processing is done on different nodes, then integrated together to generate the output. distributed parallel system offers a processing power that is the sum of the cluster computing. To run irregular parallel applications from multiple users efficiently on dynamically shared systems, a runtime load manager or a scheduler, a distributed database is a critical component for a Multi User Domain (MUD) server. Application level is preferred to increase the application performance and efficient execution on such environment with a system level scheduler and novel decision making mechanism. From the flexibility and performance, this system is different from a general-purpose cluster system because there are three approaches to describe this system. One is the centralized approach, which uses scheduling, communicating into the network of cluster nodes according to users workload. The second is dynamic approach, which is establishing an internal dynamic cluster network model according to the action of user's workload. The third is distributed approach, which is reservation based: this approach uses local scheduler and communicate with the internal dynamic network of cluster nodes from the existing system for the user's workload. While centralized approach is attractive to support parallel job scheduling and provide predictability, some shortcomings;that is cost for paying a synchronization overhead and higher chance

关键词： distributed computer systems

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Proceedings. 11th ieee international conference on Embedded and Real-Time computing systems and Applications

Proceedings. 11th IEEE International Conference on Embedded ...

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ieee international conference on Embedded and Real-Time computing systems and Applications (RTCSA)

The following topics are dealt with: embedded and real-time computing systems and applications; scheduling; operating systems; communications; QoS support; sensor networks and information systems; energy aware design; data services; distributed/multiprocessor systems; hardware/software co-design and mobile and ubiquitous computing.

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