检索结果-内蒙古大学图书馆

International Conference on Grid and Cooperative Computing (GCC)

作者： Hussein Gibbins Rajkumar Buyya Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Grid computing has emerged as an effective means of facilitating the sharing of distributed heterogeneous resources, enabling collaboration in large scale environments. However, the nature of grid systems coupled with the overabundance and fragmentation of information, makes it difficult to monitor resources, services, and computations in order to plan and make decisions. In this paper we present Gridscape II, a customisable portal component that can be used on its own or plugged-in to compliment existing grid portals. Gridscape II manages the gathering of information from arbitrary, heterogeneous and distributed sources and presents them together seamlessly within a single interface. It also leverages the Google Maps API in order to provide a highly interactive user interface. Gridscape II is simple and easy to use, providing a solution to those users who do not wish to invest heavily in developing their own monitoring portal from scratch, and also for those users who want something easy to customise and extend for their specific needs

关键词： Portals Grid computing Information management Middleware Switches Resource management computerized monitoring computer science software engineering Collaborative software

来源：评论

学校读者我要写书评

暂无评论

Managing Risk of Inaccurate Runtime Estimates for Deadline Constrained Job Admission Control in Clusters

Managing Risk of Inaccurate Runtime Estimates for Deadline C...

引用

International Conference on Parallel Processing (ICPP)

作者： Chee Shin Yeo Rajkumar Buyya Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia

The advent of service-oriented grid computing has resulted in the need for grid resources such as clusters to enforce user-specific service needs and expectations. Service level agreements (SLAs) define conditions which a cluster needs to fulfill for various jobs. An example of SLA requirement is the deadline by which a job has to be completed. In addition, these clusters implement job admission control so that overall service performance does not deteriorate due to accepting exceeding amount of jobs. However, their effectiveness is highly dependent on accurate runtime estimates of jobs. This paper thus examines the adverse impact of inaccurate runtime estimates for deadline constrained job admission control in clusters using the earliest deadline first (EDF) strategy and a deadline-based proportional processor share strategy called Libra. Simulation results show that an enhancement called LibraRisk can manage the risk of inaccurate runtime estimates better than EDF and Libra by considering the risk of deadline delay

关键词： Risk management Admission control Grid computing Runtime library Delay estimation Resource management Quality of service Laboratories computer science software engineering

来源：评论

学校读者我要写书评

暂无评论

COCA: A Contract-Based Infrastructure for Composing Adaptive Multimedia systems

COCA: A Contract-Based Infrastructure for Composing Adaptive...

引用

International Conference on Distributed Computing systems Workshop

作者： Zhinan Zhou P.K. McKinley Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

Achieving acceptable quality of service in highly dynamic computing environments requires not only adaptation and reconfiguration of individual components of the system, but also collaboration among these components. To address these issues in adaptive multimedia applications, we propose COCA, a contract-based collaborative adaptation infrastructure. COCA uses contract specifications to describe the relationships among different system components, to generate code that realizes adaptive functionality, and to govern system-wide adaptive behavior during execution. COCA also provides a set of reusable adaptation services that enable legacy components to be integrated into an adaptive system. We demonstrate the use of COCA to construct an adaptive multimedia conferencing system from a collection of existing components that were not originally designed for interoperation.

关键词： Adaptive systems Multimedia systems Collaboration Contracts Quality of service Streaming media Application software Forward error correction Middleware Distributed computing

来源：评论

学校读者我要写书评

暂无评论

Sacrificing a Little Coverage Can Substantially Increase Network Lifetime

Sacrificing a Little Coverage Can Substantially Increase Net...

引用

IEEE Communications Society Conference on Sensor and Ad Hoc Communications and Networks (SECON)

作者： Limin Wang Sandeep S. Kulkarni Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

We present a simple, local protocol, pCover, which provides partial (but high) coverage in sensor networks. Through pCover, we demonstrate that it is feasible to maintain a high coverage (~90%) while significantly increasing coverage duration when compared with protocols that provide full coverage. In particular, we show that we are able to maintain 94% coverage for a duration that is 2.3-7 times the duration for which existing protocols maintain full coverage. Through simulations, we show that our protocol provides load balancing, i.e., the desired level of coverage is maintained (almost) until the point where all sensors deplete their batteries

关键词： Protocols Peer to peer computing Batteries Surveillance Fires Communications Society Sensor systems Load management software engineering Laboratories

来源：评论

学校读者我要写书评

暂无评论

A budget constrained scheduling of workflow applications on utility Grids using genetic algorithms

A budget constrained scheduling of workflow applications on ...

引用

Workshop on Workflows in Support of Large-Scale science, WORKS

作者： Jia Yu Rajkumar Buyya Grid Computing and Distributed Systems (GRIDS) Laboratory Department of Computer Science and Software Engineering University of Melbourne VIC Australia

Over the last few years, grid technologies have progressed towards a service-oriented paradigm that enables a new way of service provisioning based on utility computing models. Users consume these services based on their QoS (quality of service) requirements. In such “pay-per-use” grids, workflow execution cost must be considered during scheduling based on users' QoS constraints. In this paper, we propose a budget constraint based scheduling, which minimizes execution time while meeting a specified budget for delivering results. A new type of genetic algorithm is developed to solve the scheduling optimization problem and we test the scheduling algorithm in a simulated grid testbed.

关键词： Genetic algorithms Silicon Photovoltaic effects Optical interconnections Microactuators Electrostatics Electrodes Mirrors Photovoltaic systems Solar power generation

来源：评论

学校读者我要写书评

暂无评论

Visualizing Requirements in UML Models

Visualizing Requirements in UML Models

引用

International Workshop on Requirements engineering Visualization (REV)

作者： Sascha Konrad Heather Goldsby Karli Lopez Betty H.c. Cheng Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA USA

As the Unified Modeling Language (UML) and modeldriven development (MDD) become increasingly common in industry, many developers are faced with the difficult task of understanding how an existing UML model realizes system requirements. Essentially, developers are required to understand the structure and behavior of UML models that they may have not created. Understanding these relationships is non-trivial, because the interactions in the model are not readily apparent. Commonly, the only means to elicit these relationships is visual inspection and guided simulation. This paper describes an alternative approach termed REVU (Requirements Visualization of UML), a process for visualizing functional requirements in terms of behavioral interactions in a UML model. We illustrate the use of this process with the visualization of scenarios for an adaptive light control system.

关键词： Visualization Unified modeling language Natural languages Inspection Programmable control Adaptive control Lighting control Adaptive systems Control systems Electrical equipment industry

来源：评论

学校读者我要写书评

暂无评论

The Application of Evolutionary Computation in Evacuation Planning

The Application of Evolutionary Computation in Evacuation Pl...

引用

International Conference on Intelligent Transportation

作者： R. Muhdi A. Garrett R. Agarwal J. Davis G. Dozier D. Umphress Department of Industrial & Systems Engineering Aubum University Auburn AL USA Department of Computer Science and Software Engineering ACI Laboratory Aubum University Auburn AL USA Department of Computer Science and Software Engineering Aubum University Auburn AL USA

Evacuation planning plays a significant role in building evacuation. The purpose of this paper is to demonstrate how an evolutionary computation technique in the form of an estimation of distribution algorithm can be used in evacuation planning. This technique is used to evolve the number and location of exits in order to minimize overall evacuation time and reduce the number of casualties and injuries. The algorithm is applied to three day-care layouts, classified as playroom, lunchroom, and classroom settings. The algorithm generates an optimal or near-optimal configuration, and results across several trials can be used to determine the probability that an exit is needed for each possible location. The best exit configurations are presented for each of the three layouts, and a brief analysis is discussed. Although evacuation planning presented in this paper is focused on room layouts, evolutionary computation techniques have the potential to be implemented in large-scale evacuation planning

关键词： Evolutionary computation Buildings Safety Humans Design automation Computational modeling computer simulation Injuries Large-scale systems Predictive models

来源：评论

学校读者我要写书评

暂无评论

Securing UML information flow using flowUML

Securing UML information flow using flowUML

引用

作者： Alghathbar, Khaled Farkas, Csilla Wijesekera, Duminda Information Systems Department College of Computer and Information Sciences King Saud University P.O. Box 51178 Riyadh 11543 Saudi Arabia Information Security Laboratory Dept. of Computer Science and Engineering University of South Carolina Columbia SC 29208 Dept. of Information and Software Engineering CSIS George Mason University Fairfax VA 22030 Faculty of Information Systems Kind Saud University Riyadh Saudi Arabia Department of Computer Science and Engineering University of South Carolina Columbia Department of Information and Software Engineering George Mason University Fairfax VA George Mason University

FlowUML is a logic-based system to validate information flow policies at the requirements specification phase of UML based designs. It uses Horn clauses to specify information flow polices that can be checked against flow information extracted from UML sequence diagrams. FlowUML policies can be written at a coarse grain level of caller-callee relationships or at a finer level involving passed attributes. Copyright © 2006, Australian computer Society Inc.

关键词： Information management

来源：评论

学校读者我要写书评

暂无评论

Self-stabilizing deterministic time division multiple access for sensor networks

引用

Journal of Aerospace Computing, Information and Communication 2006年第8期3卷 403-419页

作者： Arumugam, Mahesh Kulkarni, Sandeep S. Michigan State University East Lansing MI 48824 Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI 48824

An algorithm for time division multiple access (TDMA) is found to be applicable in converting existing distributed algorithms into a model that is consistent with sensor networks. Such a TDMA service needs to be self-stabilizing so that in the event of corruption of assigned slots and clock drift, it recovers to states from where TDMA slots are consistent. Previous self-stabilizing solutions for TDMA are either randomized or assume that the topology is known upfront and cannot change. Thus, the question of feasibility of self-stabilizing deterministic TDMA algorithm where the topology is unknown remains open. In this paper, we present a self-stabilizing deterministic algorithm for TDMA in networks where a sensor is only aware of its neighbors. To our knowledge, this is the first such algorithm that achieves these properties. Moreover, this is the first algorithm that demonstrates the feasibility of stabilization-preserving deterministic transformation of a program in shared-memory model on an arbitrary topology into a program that is consistent with the sensor network model. © 2006 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Time division multiple access

来源：评论

学校读者我要写书评

暂无评论

Integrated information processing and communications: Complexity analysis

Integrated information processing and communications: Comple...

引用

IASTED International Conference on COMMUNICATION systems AND APPLICATIONS Part of the Sixth IASTED International Multi-Conference on WIRELESS AND OPTICAL COMMUNICATIONS

作者： Huyu, Qu Le, Yi Wang Yaprak, Ece Hong, Wang Yanlong, Zhao Department of Electrical and Computer Engineering Wayne State University Detroit MI 48202 United States Division of Engineering Technology Wayne State University Detroit MI 48202 United States Department of Anesthesiology Wayne State University Detroit MI 48202 United States Key Laboratory of System and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences China

Accuracy of information transmission when a signal must be transmitted through a communication channel is of essential importance in design of communication systems. When system resources are limited, such as transmission bandwidths assigned to a wireless communication channel, appropriate utility of available resources becomes imperative. This paper investigates fundamental relationships between accuracy of information exchange and communication resources, on a platform of wireless communication channels that involve typical system blocks of data compression, quantization, and stochastic wireless channels. The main complexity relationships developed in this paper provide rigorous trade-off between resource consumptions and information processing errors of each block. When these relationships are integrated, an optimization procedure emerges that allows optimal allocation of resources to each system block, such as compression ratio, quantization levels, and transmission speed, to maximize overall information accuracy. Consequently, the overall errors of the transmitted signal will be minimized at the receiver end.

关键词： Data processing

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：