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检索条件"任意字段=2010 International Conference on Parallel and Distributed Computing and Networks, PDCN 2010"

共 2393 条记录，以下是251-260 订阅

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Local Acceleration in distributed Geographic Information Processing with CUDA

Local Acceleration in Distributed Geographic Information Pro...

引用

18th international conference on Geoinformatics

作者： Zhao, Yong Huang, Zhou Chen, Bin Fang, Yu Yan, Menglong Yang, Zhenzhen Peking Univ Inst Remote Sensing & Geog Informat Syst Beijing 100871 Peoples R China

ISBN: (纸本)9781424473021

DGIP (distributed Geographic Information Processing) has become a new tendency of GIS (Geographic Information System) recently. DGIP focuses on how to organize and process a series of geographic resources in distributed computing environment and now existing research is mainly carried out from a global point of view. But it is noticeable that each computing node in distributed computing environment will carry a heavy load with growth of data quantity. So this paper concentrates on how to make each computing node fulfill the subtask more quickly to achieve efficient local acceleration. The paper designs a prototype for distributed remote sensing image processing and achieves local acceleration in each computing node with CUDA (Compute Unified Device Architecture). Firstly, the paper introduces the distributed procedure of the prototype and overviews the architecture and programming model of CUDA. Then the paper takes Mean Filter as an example to design and implement the parallel program with CUDA to accelerate the procedure of remote sensing image processing in each node. To evaluate the performance of the local acceleration, the paper carries out a group of comparative tests between the parallel implementation with CUDA and the conventional implementation. The results demonstrate that the local acceleration with CUDA runs more than 20 times faster than conventional process.

关键词： local acceleration DGIP CUDA parellel programming

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Heuristic Spectrum Assignment Algorithm in distributed Cognitive networks

Heuristic Spectrum Assignment Algorithm in Distributed Cogni...

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6th international conference on Wireless Communications, Networking and Mobile computing (WICOM)

作者： Yu, Li Liu, Cong Liu, Zuhao Hu, Wenyu Huazhong Univ Sci & Technol Elect & Informat Engn Dept Wuhan Natl Lab Optoelect Div Commun & Intelligent Networks Wuhan 430074 Peoples R China

ISBN: (纸本)9781424437092

Cognitive radio is an exciting emerging technology that has the potential of dealing with the urgent requirement and scarcity of the radio spectrum. Although having multiple radio interfaces and available spectrum bands can generally increase the effective throughput, a problem arises as to what the best strategy to dynamically assign available bands to secondary users for maximizing throughput by minimizing the interference, and what the best scheme to allocate the spectrum holes to unlicensed users to maximize the fairness. This paper presents a distributed and heuristic spectrum assignment algorithm for multi-radio wireless cognitive networks in a cognitive network environment. The proposed algorithm (Fairness Bargaining with Maximum throughput, FBMT) considers the problems including system throughput and the fairness. Extensive simulation studies in 802.11 based multi-radio cognitive networks have been performed. The results indicate that the proposed algorithm can facilitate a large increase in network throughput and acquire a good fairness performance in comparison with a common spectrum assignment mechanism that is used as a benchmark in the literature.

关键词： Cognitive Network distributed Spectrum Assignment Throughput Fairness FBMT

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Energy Efficient Information-Driven Target Location Estimation in Wireless Sensor networks

Energy Efficient Information-Driven Target Location Estimati...

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6th international conference on Wireless Communications, Networking and Mobile computing (WICOM)

作者： Khonsari, Hossein Kahaei, Mohammad Hossein Iran Univ Sci & Technol Dept Elect Engn Tehran Iran

ISBN: (纸本)9781424437092

This paper describes a technique to save energy in the distributed Information_Driven maximum likelihood algorithm used for the localization of a diffusive source in Wireless Sensor networks. First, the accurate Information_driven maximum likelihood distributed estimation based on the Gauss-Newton method is derived and called Modified Information-driven Collaborative Processing (MIDCP). In this method, a neighborhood region is defined and the information of all sensor nodes in this area is used to increase the algorithm accuracy. Then, a method for decreasing the energy consumption of this algorithm is proposed and called Energy Efficient MIDCP (EFMIDCP). In this algorithm, for estimation update, first, the neighboring radius is set to communication range of sensor nodes. After that, based on the covariance of estimation error in each iteration, this radius is decreased. Therefore, the amount of energy consumption is abated because of less transmission. Simulation results show the low energy consumption in the second proposed algorithm while its accuracy is rather well.

关键词： Gauss-Newton method Gaussian processes Newton method distributed information driven maximum likelihood algorithm energy consumption energy efficient information-driven target location estimation maximum likelihood estimation modified information-driven collaborative processing sensor nodes wireless sensor networks wireless sensor networks

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distributed spatial analysis in wireless sensor networks

Distributed spatial analysis in wireless sensor networks

引用

16th IEEE international conference on parallel and distributed Systems, ICPADS 2010

作者： Jabeen, Farhana Fernandes, Alvaro A.A. School of Computer Science University of Manchester Manchester M13 9PL United Kingdom

ISBN: (纸本)9780769543079

Environmental monitoring is an important application area for wireless sensor networks (WSNs). An important problem for environmental WSNs is the characterization of the dynamic behaviour of transient physical phenomena over space. In the case of mote-level WSNs, a solution that is computed inside the WSN is essential for energy efficiency. In this context, the main contributions of this paper to the literature on in network processing in WSNs are threefold. The paper further develops an algebraic framework with which one can express and evaluate complex topological relationships over geometrical representations of permanent features (e.g., buildings, or geographical features such as lakes and rivers) and of transient phenomena (e.g., areas of mist over a cultivated field). The paper then describes distributed implementations of spatial-algebraic operations over the regions represented by that framework, thereby enabling identification of topological relationships between regions. Finally, the paper presents experimental evidence that the techniques described lead to efficient runtime behaviour. Taken together, these contributions constitute a further step towards enabling the high-level specification of expressive spatial analyses for efficient execution inside a WSN. © 2010 IEEE.

关键词： Algebra

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Scavenger: Transparent development of efficient cyber foraging applications

Scavenger: Transparent development of efficient cyber foragi...

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8th IEEE international conference on Pervasive computing and Communications, PerCom 2010

作者： Kristensen, Mads Darø Interactive Spaces Aarhus University Aarhus Denmark

ISBN: (纸本)9781424453290

Cyber foraging is a pervasive computing technique where small mobile devices offload resource intensive tasks to stronger computing machinery in the vicinity. This paper presents Scavenger - a new cyber foraging system supporting easy development of mobile cyber foraging applications, while still delivering efficient, mobile use of remote computing resources through the use of a custom built mobile code execution environment and a new dual-profiling scheduler. One of the main difficulties within cyber foraging is that it is very challenging for application programmers to develop cyber foraging enabled applications. An application using cyber foraging is working with mobile, distributed and, possibly, parallel computing;fields within computer science known to be hard for programmers to grasp. In this paper it is shown by example, how a highly distributed, parallel, cyber foraging enabled application can be developed using Scavenger. Benchmarks of the example application are presented showing that Scavenger imposes only minimal overhead when no surrogates are available, while greatly improving performance as surrogates become available. ©2009 IEEE.

关键词： Ubiquitous computing

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Solving the multi-operator placement problem in large-scale operator networks

Solving the multi-operator placement problem in large-scale ...

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2010 19th international conference on Computer Communications and networks, ICCCN 2010

作者： Rizou, Stamatia Dürr, Frank Rothermel, Kurt Universität Stuttgart Institute of Parallel and Distributed Systems Universitätsstraße 38 70569 Stuttgart Germany

ISBN: (纸本)9781424471164

Processing streams of data in an overlay network of operators distributed over a wide-area network is a common idea shared by different applications such as distributed event correlation systems and large-scale sensor networks. In order to utilize network resources efficiently and allow for the parallel deployment of a large number of large-scale operator networks, suitable placement algorithms are vital that place operators on physical nodes. In this paper, we present a distributed placement algorithm that minimizes the bandwidth-delay product of data streams between operators of the network in order to reduce the induced network load. Since the fundamental optimization problem is NP-hard, we propose a heuristic solution. First, we calculate an optimal solution in an intermediate continuous search space, called latency space. Subsequently the continuous solution is mapped to the physical network. Our evaluations show that this algorithm reduces the resulting network load significantly compared to state of the art algorithms and achieves results close to the optimum. © 2010 IEEE.

关键词： Wide area networks

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Research and implementation of distributed simulation and parallel rendering system based on grid

Research and implementation of distributed simulation and pa...

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international conference on Networking and distributed computing

作者： Zhang, Yaping Peng, Haoyu Wang, Zonghui Shi, Jiaoying Faculty of Computer Science and Information Technology Yunnan Normal University Kunming China College of Computer Science and Information Engineering Zhejiang Gongshang University Hangzhou China College of Computer Science and Technology Zhejiang University Hangzhou China State Key Lab. of CAD and CG Zhejiang University Hangzhou China

ISBN: (纸本)9780769542072

With the development of Grid technology and the extension of Grid application areas, it needs to provide core infrastructure platform and the necessary functional components for large-scale resources sharing and collaboration. Based on the previous implementation of interactive Grid visualization system, this paper extends its runtime environment layer to provide Grid supports for the existing distributed simulation support platform and parallel graphics rendering system based on PC cluster, consequently realizes dynamic resource allocation and scheduling. Additionally, we present and implement a Grid-based distributed simulation and parallel rendering system which provides large-scale distributed simulation service and parallel rendering as well as high-resolution multi-screen tiled display service of massive complex scene to end users through an extended Grid portal. © 2010 IEEE.

关键词： Grid computing

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Skandium: Multi-core Programming with Algorithmic Skeletons

Skandium: Multi-core Programming with Algorithmic Skeletons

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18th Euromicro international conference on parallel, distributed and Network-Based Processing (PDP)

作者： Leyton, Mario Piquer, Jose M. Univ Chile NIC Labs Miraflores 222Piso 14 Santiago 8320198 Chile Univ Chile DCC Santiago Chile

ISBN: (纸本)9780769539393

This paper argues that algorithmic skeletons are a suitable programming model for multi-core architectures. The high-level abstractions offered by algorithmic skeletons provide a simple way for non-parallel programmers to address parallel programming. Previous algorithmic skeleton frameworks and libraries have addressed distributed computing environments such as Clusters and Grids. This paper proposes a parallel skeleton library, Skandium;and concludes, after an experimental evaluation, that algorithmic skeletons are an effective methodology to program multi-core architectures.

关键词： parallel programming multi-core patterns algorithmic skeletons

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A High-Order Finite Element parallel MatLab Software

A High-Order Finite Element Parallel MatLab Software

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7th international conference on Engineering Computational Technology

作者： Bargos, F. F. Augusto, R. A. Bittencourt, M. L. Univ Estadual Campinas Fac Mech Engn Dept Mech Design Campinas SP Brazil

ISBN: (纸本)9781905088416

This work presents a high-order finite element solver developed in the MatLab environment with procedures for high performance computing based on a very simple domain decomposition technique. The code has been developed with the goal of testing news procedures for the solution of finite elements problems using distributed computing. The code has been tested in many different problems including Poisson operator, Plane Stress, Plane Strain, Linear and Nonlinear Elasticity, Optimization, Contact and Reynolds Equation. This paper aims to present features of the developed software, mainly the aspects of domain decomposition and distributed computing.

关键词： finite element method distributed computation MatLab parallel high-performance computing

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A methodology for the use of the teleo-reactive programming technique in autonomic computing

A methodology for the use of the teleo-reactive programming ...

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11th ACIS international conference on Software Engineering, Artificial Intelligence, Networking and parallel/distributed computing, SNPD2010

作者： Hawthorne, James Anthony, Richard School of Computing and Mathematical Sciences University of Greenwich London United Kingdom

ISBN: (纸本)9780769540887

Previous work on the use of the Teleo-Reactive technique in high level software development has shown it to be a viable approach for autonomic systems. A T-R program can recover from unexpected events without knowing the underlying source or cause of the problem and thus reduces the maintenance costs of software projects where unexpected events are a likely and frequent occurrence. Previous work has also highlighted the difficult nature of designing and structuring the high level logic in a T-R program and so this work aims to reduce the problem by providing a software engineering strategy that will both drive the program development and reduce the occurrence of logic problems. © 2010 IEEE.

关键词： Software design

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