检索结果-内蒙古大学图书馆

International Workshop/Symposium on Distributed Simulation and Real-Time Applications (DS-RT)

作者： D. Igbe N. Kalantery S. Ijaha S. Winter Centre for Parallel Computing University of Westminster London UK

ISBN: (纸本)9780769520360

In this paper, we present the implementation of a parallel road traffic simulation using the concept of lane cut points (LCP) in the Spider programming environment. LCP are storage buffers inserted into lane data structures at the road network partition edges. Vehicles enter a partition at the edges from an LCP and exit a partition edge into an LCP at the end of every simulation step. Spider, a parallel programming environment, which runs on PVM, coordinates the execution of the parallel traffic simulation.

关键词： Traffic control Computational modeling Roads Telecommunication traffic Microscopy Vehicles Buffer storage Data structures Costs Scalability

来源：评论

学校读者我要写书评

暂无评论

Interest management in agent-based distributed simulations 03

Interest management in agent-based distributed simulations

引用

International Workshop/Symposium on Distributed Simulation and Real-Time Applications (DS-RT)

作者： Lihua Wang S.J. Turner Fang Wang Parallel & Distributed Computing Centre Nanyang Technological University Singapore

ISBN: (纸本)9780769520360

Distributed simulation enables participants situated in different geographical locations to share a common virtual world, which is called a distributed virtual environment (DVE). Among the different research topics concerned with DVE, there is a current trend of linking multi-agent systems and DVE together. With the properties of autonomy, social ability, reactivity and proactiveness, agents can be used to represent entities in DVE, where fast and accurate decision making is a determining factor of the whole environment. This paper provides a description of integrating agents into an HLA-based distributed simulation. It focuses on how to construct the sensor of an agent with different interest management schemes. Using the JADE (Java agent development framework) agent toolkit and the high level architecture (HLA) in our prototype, a minesweeping game, we outline two different implementations of this game. Due to the dynamic characteristics of agents, a problem of overdue information from the environment is discussed, and we propose an enlarged subscription region method to solve this problem. Moreover, advisories provided by the HLA are adopted to reduce the overheads. Conclusions are drawn based on the experimental results of these implementations.

关键词： Computational modeling Virtual environment Multiagent systems Java Game theory Distributed computing Computer simulation Avatars Concurrent computing Joining processes

来源：评论

学校读者我要写书评

暂无评论

Non-functional Oriented Dynamic Integration Of Distributed Components

引用

Electronic Notes in Theoretical Computer Science 2003年第3期68卷 405-418页

作者： Ahmed Saleh George R.R. Justo Stephen C. Winter Centre For Parallel Computing Computing University of Westminster London UK Cap Gemini Ernst & Young London UK Cavendish School of Computer Science University of Westminster London UK

Building distributed systems from scratch is known as one of the most difficult and time consuming process in software engineering. A great deal of progress has been made in the development of middleware and techniques to facilitate the process of distributed systems through integrating reusable components and customizing middleware. However, most of these solutions tend to focus on the functional aspects of the components and how to adapt their behavior according to their needs. Although the non-functional properties of the services are equally important, because of the difficulties in representing and controlling them, they are usually neglected. This paper investigates the problem of distributed systems' non-functional properties and describes a framework that presents a solution to the problem. The framework is based on the idea of defining the non-functional properties of the services at the early stages of the design and incorporating such properties within the architecture to ease the process of managing the system at run time.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Process/sup NFL/: a language for describing non-functional properties

Process/sup NFL/: a language for describing non-functional p...

引用

Annual Hawaii International Conference on System Sciences (HICSS)

作者： N.S. Rosa P.R.F. Cunha G.R.R. Justo Centro de Informática Universidade Federal de Pernambuco Recife Pernambuco Brazil Centre for Parallel Computing University of Westminster London UK

ISBN: (纸本)0769514359

Nonfunctional requirements (NFRs) are rarely taken in account in software development. There are reasons that help us to understand why these requirements are not explicitly dealt with: their complexity NFRs are usually stated only informally, their high abstraction level, and the rare support of languages, methodologies and tools. In this scenario, we concentrate on defining a language, namely Process/sup NFL/, that expresses NFRs during software development. This language has been designed to consider specific characteristics of NFRs like their correlations and conflicts. In order to illustrate our language, we describe NFRs of software radios and the NFRs performance and security, which are usually present in software requirements specifications.

关键词： Logic Atomic measurements Programming Security Software measurement Software quality Proposals Software radio Data structures Availability

来源：评论

学校读者我要写书评

暂无评论

ProcessNFL: A language for describing non-functional properties 35

ProcessNFL: A language for describing non-functional propert...

引用

35th Annual Hawaii International Conference on System Sciences, HICSS 2002

作者： Rosa, N.S. Cunha, P.R.F. Justo, G.R.R. Centro de Informàtica Universidade Federal de Pernambuco Av. Prof. Luiz Freire s/n RecifePernambuco50732-970 Brazil Centre for Parallel Computing University of Westminster 115 New Cavendish Street LondonW1M 8JS United Kingdom

ISBN: (纸本)0769514359

关键词： Computer software selection and evaluation

来源：评论

学校读者我要写书评

暂无评论

Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing

引用

Physical Review D 2002年第5期65卷 054502-054502页

作者： C. R. Allton S. P. Booth K. C. Bowler J. Garden A. Hart D. Hepburn A. C. Irving B. Joó R. D. Kenway C. M. Maynard C. McNeile C. Michael S. M. Pickles J. C. Sexton K. J. Sharkey Z. Sroczynski M. Talevi M. Teper H. Wittig Department of Physics University of Wales Swansea Swansea SA2 8PP Wales Edinburgh Parallel Computing Centre University of Edinburgh Edinburgh EH9 3JZ Scotland Department of Physics & Astronomy University of Edinburgh Edinburgh EH9 3JZ Scotland Department of Applied Mathematics and Theoretical Physics University of Cambridge Cambridge CB3 0WA England Division of Theoretical Physics Department of Mathematical Sciences University of Liverpool Liverpool L69 3BX England School of Mathematics Trinity College Dublin 2 IrelandHitachi Dublin Laboratory Dublin 2 Ireland Theoretical Physics University of Oxford Oxford OX1 3NP England

We present results for the static interquark potential, lightest glueballs, light hadron spectrum, and topological susceptibility using a nonperturbatively improved action on a 163×32 lattice at a set of values of the bare gauge coupling and bare dynamical quark mass chosen to keep the lattice size fixed in physical units (∼1.7 fm). By comparing these measurements with a matched quenched ensemble, we study the effects due to two degenerate flavors of dynamical quarks. With the greater control over residual lattice spacing effects which these methods afford, we find some evidence of charge screening and some minor effects on the light hadron spectrum over the range of quark masses studied (MPS/MV>~0.58, where PS denotes pseudoscalar and V denotes vector). More substantial differences between quenched and unquenched simulations are observed in measurements of topological quantities.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An integrated grid environment for component applications 2nd

引用

2nd International Workshop on Grid computing, GRID 2001

作者： Furmento, Nathalie Mayer, Anthony McGough, Stephen Newhouse, Steven Field, Tony Darlington, John Imperial College Parallel Computing Centre Department of Computing Imperial College of Science Technology and Medicine LondonSW7 2BZ United Kingdom

ISBN: (纸本)3540429492

Computational grids present many obstacles to their effective exploitation by non-trivial applications. We present a grid middleware, implemented using Java and Jini, that eliminates these obstacles through the intelligent use of meta-data relating to the structure, behaviour and performance of an application. We demonstrate how different problem sizes and selection criteria (minimum execution time or minimum cost) utilise different implementations for the optimal solution of a set of linear equations. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Middleware

来源：评论

学校读者我要写书评

暂无评论

On the Treatment of Non-Functional Properties of Dynamic Distributed Software Architectures 14

On the Treatment of Non-Functional Properties of Dynamic Dis...

引用

14th International Conference on parallel and Distributed computing Systems, PDCS 2001

作者： Rosa, Nelson S. Cunha, Paulo R.F. Justo, George R.R. Centre of Informatics Federal University of Pernambuco Pernambuco Recife50732-970 Brazil Centre for Parallel Computing University of Westminster LondonWIM 8JS United Kingdom

ISBN: (纸本)9781618395740

One of key methods to increase availability of distributed systems is to allow dynamic changes to place at runtime without to stop the entire system. A critical task carried out during such changes consists of verifying and preserving the functional properties of the system. However, as important as to preserve the integrity of functional aspects, non-functional properties (e.g., security and performance) must also be preserved when modifications occur. We present a formal approach for specifying non-functional properties of dynamic distributed systems. This approach allows formal verification to be performed before a change is committed. 'The paper illustrates our approach with an example of a dynamic client-server application. © (2001) by the International Society for Computers and Their Applications All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Benchmarking Java against C and Fortran for scientific applications 01

Benchmarking Java against C and Fortran for scientific appli...

引用

Proceedings of the ACM 2001 Java Grande/ISCOPE Conference

作者： Bull, J.M. Smith, L.A. Pottage, L. Freeman, R. Edinburgh Parallel Computing Centre James Clerk Maxwell Building University of Edinburgh Mayfield Road Edinburgh EH9 3JZ United Kingdom

ISBN: (纸本)1581133596

Increasing interest is being shown in the use of Java for scientific applications. The Java Grande benchmark suite was designed with such applications primarily in mind. The perceived lack of performance of Java still deters many potential users, despite recent advances in just-in-time (JIT) and adaptive compilers. There are however few benchmark results available comparing Java to more traditional languages such as C and Fortran. To address this issue, a sub-set of the Java Grande Benchmarks have been re-written in C and Fortran allowing direct performance comparisons between the three languages. The performance of a range of Java execution environments, C and Fortran compilers have been tested across a number of platforms using the suite. These demonstrate that on some platforms (notably Intel Pentium) the performance gap is now quite small.

关键词： Java programming language

来源：评论

学校读者我要写书评

暂无评论

A framework for building non-functional software architectures 01

A framework for building non-functional software architectur...

引用

2001 ACM Symposium on Applied computing, SAC 2001

作者： Rosa, Nelson S. Justo, George R.R. Cunha, Paulo R.F. Universidade Federal de Pernambuco Centro de Informática Av. Prof. Luiz Freire s/n Recife Pernambuco Brazil University of Westminster Centre for Parallel Computing 115 New Cavendish Street LondonW1M 8JS United Kingdom

ISBN: (纸本)1581132875

Non-functional requirements ( NFRs ) are rarely taken in account in most software development processes. There exist reasons that can help us to understand why these requirements are not explicitly dealt with: their complexity, t heir usually informal statement, t heir high abstraction level, as well as the rare support of languages, m ethodologies and tools for them. In this paper, w e introduce a framework for explicitly dealing with NFRs in the software development process. This framework addresses the description, i ntegration with functional requirements, r efinement and mapping of NFRs into actual implementation elements. © 2001 ACM.

关键词： High level languages

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：