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3rd international Conference on parallel and distributed processing and applications

作者： Ni, JR Zhang, CQ Univ Technol Sydney Fac Informat Technol Broadway NSW 2007 Australia

ISBN: (纸本)3540297693

Some trading strategies are becoming more and more complicated and utilize a large amount of data, which makes the backtesting of these strategies very time consuming. This paper presents an efficient implementation of the backtesting of such a trading strategy using a parallel genetic algorithm (PGA) which is fine tuned based on thorough analysis of the trading strategy. The reuse of intermediate results is very important for such backtesting problems. Our implementation can perform the backtesting within a reasonable time range so that the tested trading strategy can be properly deployed in time.

关键词： distributed computer systems

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On implementation of an enhanced and integrated parallel programming web-based toolkit

On implementation of an enhanced and integrated parallel pro...

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ITRE 2005 - 3rd international Conference on Information Technology: Research and Education

作者： Li, Kuan-Ching Yang, Chao-Tung Parallel and Distributed Processing Center Dept. of Computer Science and Information Management Providence University Shalu Taichung 43301 Taiwan High Performance Computing Laboratory Dept. of Computer Science and Information Engineering Tunghai University Taichung City Taichung 40704 Taiwan

ISBN: (纸本)0780389328

The computing power provided by high performance and low cost PC-based clusters and Grid computing platforms are attractive and they are equal or superior to supercomputers and mainframes. In parallel, discussions on how to obtain more computing power from these computing platforms become an interesting issue. The development of applications for these high-performance computing platforms is complicated for several reasons: The complexity of applications themselves, which combines aspects of supercomputing and distributed computing, and by the need to achieve higher performance. This paper describes the design rationale and implementation of a parallel programming web-based toolkit, to ease the parallel programming learning process, with the use of web-based interface. The toolkit has widely been used in MPI parallel programming courses (both in graduate and undergraduate levels) and industry trainings. © 2005 IEEE.

关键词： Computer programming

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distributed network computing on transient stability analysis and control

Distributed network computing on transient stability analysi...

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3rd international Conference on parallel and distributed processing and applications

作者： Huang, CR Chen, MX Nanjing Inst Technol Nanjing 210013 Peoples R China Nanjing Univ Posts & Telecommun Nanjing 210003 Peoples R China

ISBN: (纸本)3540297693

In this paper, we introduce graph theory into transient stability analysis in power system. In the weighted graph, Vertex weight represents node's parallel computing workload and edge weight represents serial computing workload on the border of regions, which reflects the degree of parallelism of computing and improves speed-up ration of system. In order to reduce communication time wastage induced by CSMA protocol in TCP/IP based LAN, asynchronous message passing is used in our method. Simulation results show that it achieves better performance.

关键词： distributed computer systems

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Latency tolerance through parallelization of time in scientific applications

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parallel COMPUTING 2005年第7期31卷 777-796页

作者： Srinivasan, A Chandra, N Florida State Univ Dept Comp Sci Tallahassee FL 32306 USA Florida State Univ Dept Mech Engn Tallahassee FL 32306 USA

Emerging computing environments, such as the Grid, promise enormous raw computational power. However, effective use of such platforms is often difficult, because conventional spatial decomposition leads to fine granularity, resulting in high communication overhead. We introduce the concept of guided simulations to parallelize along the time domain. Here, we use the fact that typically results of other simulations of closely related problems are available. In this approach, we automatically and dynamically determine a relationship between old simulations and the one being performed, and use this to parallelize along the time domain. We demonstrate the validity of this approach by applying the technique to an important application involving molecular dynamics simulation of nanomaterials. In this application, spatial decomposition is not effective due to the small size of the physical system. However, time parallelization is effective, since the granularity is much coarser. We also mention how this approach can be extended to make it inherently fault tolerant. (c) 2005 Elsevier B.V. All rights reserved.

关键词： parallel algorithm time parallelization molecular dynamics temporal decomposition

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Communication-free data alignment for arrays with exponential references using elementary linear algebra

Communication-free data alignment for arrays with exponentia...

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3rd international symposium on parallel and distributed processing and applications, ispa 2005

作者： Chang, Weng-Long Guo, Minyi Ho, Michael Tsai, Sien-Tang Department of Information Management Southern Taiwan University of Technology Tainan County Taiwan Department of Computer Software University of Aizu Fukushima 965-8580 Japan

ISBN: (纸本)3540297693

For array references with induction variables, after induction variable substitution for those induction variables is performed, those array references substituted are transformed as nonlinear expressions. The goal of data alignment is to intelligently map computations and data onto a set of virtual processors organized as a Cartesian grid with multi-dimensions (or a template in HPF term), and to provide data locality in a program so that the data access communication costs can be minimized. Most data alignment methods are mainly devised to align the arrays referenced using linear subscripts or quadratic subscripts with n loop index variables [Chang, 2004], In this paper, we propose a new communication-free data alignment technique to align the arrays referenced using exponential subscripts with n loop index variables or other complex nonlinear expressions. The experimental results from our techniques on SPEC95FP Benchmarks point out that the techniques can be applied to improve the execution time of the subroutines in those benchmarks. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Data processing

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Design and evaluation of Network-Bandwidth-Based parallel Replication Algorithm

Design and evaluation of Network-Bandwidth-Based Parallel Re...

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3rd international Conference on parallel and distributed processing and applications

作者： Wang, YJ Qin, YJ Natl Univ Def Technol Inst Comp Natl Lab Parallel & Distributed Proc Changsha 410073 Peoples R China

ISBN: (纸本)3540297693

Data replication can be used to reduce bandwidth consumption and access latency in the distributed system where users require remote access to large data objects. In this paper, according to the intrinsic characteristic of distributed storage system, the parallel replication algorithm NBPRA (Network-Bandwidth-based parallel Replication Algorithm) is proposed. In the NBPRA, according to the network state, several replicas of a data object are selected, which are of the least access cost;then the different parts of the data object are transferred from these replicas, and they are used to make a new replica. The results of performance evaluation show that the NBPRA can utilize the network bandwidth efficiently, provide high data replication efficiency and substantially better access efficiency, and the improvement of system performance is related to the number of different data objects accessed by jobs.

关键词： distributed computer systems

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Manage distributed ontologies on the Semantic Web

Manage distributed ontologies on the Semantic Web

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3rd international Conference on parallel and distributed processing and applications

作者： Wang, P Xu, BW Lu, JJ Kang, DZ Lil, YH SE Univ Dept Comp Sci & Engn Nanjing 210096 Peoples R China Jiangsu Inst Software Qual Nanjing 210096 Peoples R China PLA Univ Sci & Technol Nanjing 210007 Peoples R China

ISBN: (纸本)3540297693

Managing distributed ontologies is a challenging issue in the Semantic Web area. Different to most current distributed ontologies management researches, which focus on ontologies maintenance, evolutions, and versioning, this paper proposes a new distributed ontologies management framework based on the function-oriented perspective, and its goal is to bring multiple distributed ontologies together to provide more powerful capabilities. Ontology mapping is the key factor for manage distributed ontologies. This management framework also proposes a novel approach to eliminate the redundancies and errors of mappings in distributed ontologies.

关键词： World Wide Web

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GA based optimal keyword extraction in an automatic chinese web document classification system

GA based optimal keyword extraction in an automatic chinese ...

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5th international symposium on parallel and distributed processing and applications/ispa 2007 international Workshops

作者： Chou, Chih-Hsun Han, Chin-Chuan Chen, Ya-Hui Chung Hua Univ Dept Comp Sci & Informat Engn 707Sec 2WuFu Rd Hsinchu 300 Taiwan Natl United Univ Dept Comp Sci & Informat Engn Miaoli 36003 Taiwan

ISBN: (纸本)9783540747666

The main steps for designing an automatic document classification system include feature extraction and classification. In this paper a method to improve feature extraction is proposed. In this method, genetic algorithm (GA) was applied to determine the threshold values of four criteria for extracting the representative keywords for each class. The purpose of these four threshold values is to extract as few representative keywords as possible. This keyword extraction method was combined with two classification algorithms, vector space model (VSM) and support vector machine (SVM), for examining the performance of the proposed classification system under various extracting conditions.

关键词： Feature extraction

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A workflow management mechanism for peer-to-peer computing platforms

A workflow management mechanism for peer-to-peer computing p...

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3rd international Conference on parallel and distributed processing and applications

作者： Wang, H Takizawa, H Kobayashi, H Tohoku Univ Grad Sch Informat Sci Aoba Ku Sendai Miyagi 9808578 Japan Tohoku Univ Informat Synergy Ctr Aoba Ku Sendai Miyagi 9808578 Japan

ISBN: (纸本)3540297693

This paper proposes a workflow management mechanism to address a neglected aspect of existing P2P computing platforms - the lack of support for various computational models. In the workflow management mechanism, a workflow description file is used to define the workflow diagram of the target application. We develop a prototype system, and evaluate it using a test program to demonstrate how the workflow management mechanism effectively works.

关键词： distributed computer systems

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An accounting services model for ShanghaiGrid

An accounting services model for ShanghaiGrid

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3rd international Conference on parallel and distributed processing and applications

作者： Yu, JD Qian, Q Li, ML Shanghai Jiao Tong Univ Dept Comp Sci & Engn Shanghai 200030 Peoples R China

ISBN: (纸本)3540297693

The ShanghaiGrid, as a Grid Computing Environment, is an information Grid to serve the public in the city, and all resources are regarded as Grid Services in the Open Grid Services Architecture (OGSA). The primary goal of the ShanghaiGrid is to build a generally shared information grid platform. Charging and accounting are an important part of the grid computing system in the ShanghaiGrid. This paper discusses an accounting services model and accounting life cycle that will be used in the ShanghaiGrid. We will analyze the charging and accounting process in detail based on this model and cycle.

关键词： distributed computer systems

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