检索结果-内蒙古大学图书馆

The Fourth international conference on parallel and distributed computing, Applications and Technologies

作者： Kun Yang Xin Guo Dayou Liu Bo Yang University College London Dept.of Electronic and Electrical EngineeringTorrington PlaceLondon WC1E 7JEUK Jilin University School of Computer Science & Technology

This paper contributes to the current literature of grid computing research by introducing Virtual Private grid(VPG)concept and corresponding supporting environment,which not only deal with the grid resource management as carried out by most researches but also take into account the network security issues for grid *** paper tends to promote VPG from the management point of view by exploring policy-based management *** concern is assigned to the private part of the VPG by employing virtual private networks(VPN)technology while leaving the grid resource management to the grid tool *** early experiment exemplifies the current implementation status and its *** paper presents a first step towards VPG and plenty of work is ongoing.

关键词： grid computing Virtual Private grid Virtual Private Network Policy-based Management

来源：评论

学校读者我要写书评

暂无评论

Quantitative performance analysis of the improved quasi-minimal residual method on massively distributed memory computers

引用

ADVANCES IN engineering SOFTWARE 2002年第3期33卷 169-177页

作者： Yang, LT Brent, RP St Francis Xavier Univ Dept Comp Sci Antigonish NS B2G 2W5 Canada Univ Oxford Comp Lab Oxford OX1 3QD England

For the solutions of linear systems of equations with unsymmetric coefficient matrices, we have proposed an improved version of the quasi-minimal residual (IQMR) method [Proceedings of The international conference on High Performance computing and Networking (HPCN-97) (1997);IEICE Trans Inform Syst E80-D (9) (1997) 919] by using the Lanczos process as a major component combining elements of numerical stability and parallel algorithm design. For the Lanczos process, stability is obtained by a coupled two-term procedure that generates Lanczos vectors scaled to unit length. The algorithm is derived so that all inner products and matrix-vector multiplications of a single iteration step are independent and the communication time required for inner product can be overlapped efficiently with computation time. In this paper, a theoretical model of computation and communications phases is presented to allow us to give a quantitative analysis of the parallel performance with a two-dimensional grid topology. The efficiency, speed-up, and runtime are expressed as functions of the number of processors scaled by the number of processors that gives the minimal runtime for the given problem size. The model not only evaluates effectively the improvements in performance due to communication reduction by overlapping, but also provides useful insight into the scalability of the IQMR method. The theoretical results on the performance are demonstrated by experimental timing results carried out on a massively parallel distributed memory Parsytec system. (C) 2002 Published by Elsevier Science Ltd.

关键词： LINEAR systems HIGH performance computing parallel algorithms

来源：评论

学校读者我要写书评

暂无评论

An evaluation of the speedup of a preliminary distributed MPI-implementation for groundwater simulation dispersion system

An evaluation of the speedup of a preliminary distributed MP...

引用

31st international conference on parallel Processing (ICPP 2002)

作者： Marino, MD Aleixo, LAG Tachibana, T Senac College of Computer Science and Technology Brazil Naval and Oceanic Engineering Department Polytechnic School of USP Brazil

ISBN: (纸本)0769516807

The main subject of this paper is to present some preliminary results of the speedup of a distributed simulator for ground water dispersion systems. A sequential version simulator, proposed in Anderson's book [1], calculates the concentrations during the dispersion of an aquifer. Depending on the number of nodes used in the grid for the simulation, the simulation time can be prohibitive. Thus a distributed simulator (DGWSDS)was developed, and the preliminary results of it speedup are showed here. Basically, the numerical method used in this simulator is finite differences. The distributed groundwater simulator dispersion system proposed and implemented achieved speedups up to 3, for a network of 8 PCs.

关键词： distributed groundwater simulation system mpi

来源：评论

学校读者我要写书评

暂无评论

engineering CORBA-based systems for high performance

Engineering CORBA-based systems for high performance

引用

31st international conference on parallel Processing (ICPP 2002)

作者： Wu, WK Majumdar, S Carleton Univ Dept Syst & Comp Engn Ottawa ON K1S 5B6 Canada

ISBN: (纸本)0769516777

Inter-operability in heterogeneous distributed systems is often provided with the help of CORBA compliant middleware. Many distributed Object computing Systems, however, are characterized by limited heterogeneity. Such systems often contain a subset of components that are written in the same programming language and run on top of the same platform. We present engineering techniques that exploit such limited heterogeneity in systems for achieving high system performance. With these techniques components implemented using diverse programming languages and/or platform use a CORBA compliant middleware, whereas the similar components can use a "Flyover" that employs a separate path between the client and its server and avoids a number of CORBA overheads. Insights into system behavior and performance gained from results of experiments with synthetic workload running on a network of PC's are presented.

关键词： Application software Computer languages distributed computing Embedded system Middleware Network servers Operating systems Scalability System performance Systems engineering and theory

来源：评论

学校读者我要写书评

暂无评论

Concurrent hardware/software coverification with Java threads

Concurrent hardware/software coverification with Java thread...

引用

international conference on parallel computing in Electrical engineering (PAR ELEC 2002)

作者： Azizi, M Univ Mohammed 1st ESTO ENSAO Oujda Morocco

ISBN: (纸本)0769517307;0769517315

We present in this paper how Java threads are used to do concurrent coverification. The threads are scheduled with respect to the order of their priorities in the case of different priorities and by using the Round-Robin technique in the case of equal priorities. The system under coverification we are interested in consists eventually of a number of hardware and software modules described by threads at the behavioral level. The coverification process follows the execution path of the global modeled system and it verifies some specification properties during the simulation. We also discuss in this paper the case of untimed and timed coverification. An illustrative application on broadcasting protocol of cache coherence reveals promising results.

关键词： Application software Broadcasting Coherence Concurrent computing Hardware Java Microelectronics Protocols Scheduling Yarn

来源：评论

学校读者我要写书评

暂无评论

grid technology with dynamic load balancing for Monte Carlo simulations 6th

Grid technology with dynamic load balancing for Monte Carlo ...

引用

6th international conference on Applied parallel computing

作者： Galyuk, YP Memnonov, VP Zhuravleva, SE Zolotarev, VI Petrodvorets Telecommun Ctr St Petersburg 198504 Star Peterhoff Russia St Petersburg State Univ Dept Math Mech St Petersburg 198504 Star Peterhoff Russia

ISBN: (纸本)354043786X

With the help of Monte Carlo simulation we study flows in very narrow channels in transitional regime. The standard difficulty of large statistical scattering in Monte Carlo simulation results, which for these problems is especially severe because of the small values of mean gas velocities in comparison with the thermal molecular speeds, has been overcomed by enlarging the samples through Internet connection of several clusters into a metacomputer. Special dynamic load balancing technique under distributed memory conditions was developed. It is described in detail and quantitative estimation of its performance is given. It is shown in particular that under condition of only 1 Mb/s Internet channel it is possible to obtain efficiency of processor's utilisation as high as 93%-94%. This is just 2%-3% lower than for pure separate computation on the same cluster. Some numerical simulation results are outlined.

关键词： Monte Carlo methods

来源：评论

学校读者我要写书评

暂无评论

The vega grid and grid-based education 1

引用

1st international conference on Web-Based Learning, ICWL 2002

作者： Xu, Zhiwei Li, Wei Fu, Hongguang Zeng, Zhenbing Institute of Computing Technology Chinese Academy of Sciences Beijing100080 China Automated Reasoning Laboratory Chinese Academy of Sciences Beijing100080 China

This paper presents research work conducted at Chinese Academy of Sciences, on the Vega grid technology and dynamic geometry technology, and how the two can integrate to provide a dynamic geometry education system bas... 详细信息

ISBN: (纸本)3540440410

关键词： engineering education

来源：评论

学校读者我要写书评

暂无评论

An enhanced smart copying (ESC) method for the reconstruction of missing audio packets 1

An enhanced smart copying (ESC) method for the reconstructio...

引用

1st international conference on Communications, Circuits and Systems, ICCCAS 2002

作者： Ng, Wei Keng Absar, J. George, S. Lau, C.T. Premkumar, B. Parallel and Distributed Processing Lab. School of Computer Engineering Nanyang Technological University Nanyang Avenue Singapore639798 Singapore ST Microelectronics Asia Pacific Pte. Ltd. Telectech Park Science Park 2 20 Science Park Road #01-28/30 Singapore117674 Singapore

ISBN: (纸本)0780375475

The paper describes an improved statistical approach for the reconstruction of missing audio packets. We demonstrate that the proposed enhanced smart copying method can successfully reconstruct lost packets with a much reduced computational time (approximately 21 times faster), while giving better quality as compared to the existing scheme. This efficiency is achieved by avoiding the direct inversion of a large matrix and requires no explicit solution for the coefficients of the underlying autoregressive model. © 2002 IEEE.

关键词： Signal reconstruction

来源：评论

学校读者我要写书评

暂无评论

Energy regenerating snubber assisted sinewave soft switching pulse modulation inverter for renewable and sustainable energy applications 1

Energy regenerating snubber assisted sinewave soft switching...

引用

1st international conference on Communications, Circuits and Systems, ICCCAS 2002

作者： Chandhaket, S. Nagai, S. Nakaoka, M. Konishi, Y. Department of Electrical Engineering Yamaguchi University UbeYamaguchi Japan Fuji Electric Co. Ltd. KobeHyogo Japan

ISBN: (纸本)0780375475

This paper presents a novel prototype of the utility-interfaced soft-switching sinewave pulse modulated inverter using the three-winding high-frequency flyback transformer for the small scale distributed solar photovoltaic power conditioner, which is defined as a cycloinverter. It is noted that the sinewave pulse modulated output current of this inverter with a high-frequency transformer link is synchronous to the AC main grid voltage. The proposed sinewave inverter type power conditioner circuit with a high-frequency link has a function of electrical isolation, which is cost-effective and reliable for small-scale distributed renewal and sustainable energy utilization system from a safety point of view. The discontinuous pulse current mode (DCM) in the secondary windings of the flyback transformer is introduced to implement a simple circuit configuration and control scheme. The auxiliary power regenerating snubber circuits with power generating snubber are mathematically analyzed for the purpose of the parameter settings. Then, the performance of the proposed cycloinverter is evaluated and discussed on the basis of the computer-aid simulation results. © 2002 IEEE.

关键词： Cost effectiveness

来源：评论

学校读者我要写书评

暂无评论

1st international conference on engineering and Deployment of Cooperative Information Systems, EDCIS 2002

引用

1st international conference on engineering and Deployment of Cooperative Information Systems, EDCIS 2002

ISBN: (纸本)9783540442226

The proceedings contain 44 papers. The special focus in this conference is on engineering and deployment of cooperative information systems. The topics include: A data warehouse for workflow logs;workflow and knowledge management: approaching an integration;linear temporal inference of workflow management systems based on timed petri net models;discovering workflow performance models from timed logs;performance equivalent analysis of workflow systems based on stochastic petri net models;an agent enhanced framework to support pre-dispatching of tasks in workflow management systems;a new method for domain-specific ontology design;an environment for multi-domain ontology development and knowledge acquisition;applying information retrieval technology to incremental knowledge management;visualizing a dynamic knowledge map using a semantic web technology;indexing and retrieval of XML-Encoded structured documents in dynamic environment;system architectures, main functions, and implementing techniques;a dynamic matching and binding mechanism for business service integration;a uniform model for authorization and access control in enterprise information platform;constraints-preserving mapping algorithm from XML-Schema to relational schema;study on SOAP-Based mobile agent techniques;securing agent based architectures;service and network management middleware for cooperative information systems through policies and mobile agents;research on enterprise modeling of agile manufacturing;HCM. a model describing cooperation of virtual enterprises;a description for service supporting cooperations and analysis of an election problem for CSCW in asynchronous distributed systems.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：