检索结果-内蒙古大学图书馆

On the application of predictive control techniques for adaptive performance management of computing systems

IEEE Transactions on Network and Service Management 2009年第4期6卷 212-225页

作者： Abdelwahed, Sherif Bai, Jia Su, Rong Kandasamy, Nagarajan Department of Electrical and Computer Engineering Mississippi State University Mississippi State MS 39759 United States Institute for Software Integrated Systems Vanderbilt University Nashville TN 37235 United States Department of Mathematics and Computer Science Eindhoven Univ. of Technology Eindhoven Netherlands Department of Electrical and Computer Engineering Drexel University Philadelphia PA 19104 United States

This paper addresses adaptive performance management of real-time computing systems. We consider a generic model-based predictive control approach that can be applied to a variety of computing applications in which the system performance must be tuned using a finite set of control inputs. The paper focuses on several key aspects affecting the application of this control technique to practical systems. In particular, we present techniques to enhance the speed of the control algorithm for real-time systems. Next we study the feasibility of the predictive control policy for a given system model and performance specification under uncertain operating conditions. The paper then introduces several measures to characterize the performance of the controller, and presents a generic tool for system modeling and automatic control synthesis. Finally, we present a case study involving a real-time computing system to demonstrate the applicability of the predictive control framework. © 2009 IEEE.

关键词： Real time systems

来源：评论

学校读者我要写书评

暂无评论

A heuristic approach for capacity control in clouds

A heuristic approach for capacity control in clouds

引用

2009 IEEE Conference on Commerce and Enterprise Computing, CEC 2009

作者： Anandasivam, Arun Buschek, Stefan Buyya, Rajkumar Institute for Information Systems and Management University of Karlsruhe Germany Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

ISBN: (纸本)9780769537559

Cloud resource providers in a market face dynamic and unpredictable consumer behavior. The way, how prices are set in a dynamic environment, can influence the demand behavior of price sensitive customers. A Cloud resource provider has to decide on how to allocate his scarce resources in order to maximize his profit. The application of bid price control for evaluating incoming service requests is a common approach for capacity control in network revenue management. In this paper we introduce a customized version of the concept of self-adjusting bid prices and apply it to the area of Cloud Computing. Furthermore, we perform a simulation in order to test the efficiency of the proposed model. © 2009 IEEE.

关键词： Consumer behavior

来源：评论

学校读者我要写书评

暂无评论

A prognosis case study for electrolytic capacitor degradation in DC-DC converters

A prognosis case study for electrolytic capacitor degradatio...

引用

Annual Conference of the Prognostics and Health Management Society, PHM 2009

作者： Kulkarni, Chetan S. Biswas, Gautam Koutsoukos, Xenofon Institute for Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University NashvilleTN37235 United States

ISBN: (纸本)9781936263004

This paper proposes a model based approach for prognosis of DC-DC power converters. We briefly review the prognosis process, and present an overview of different approaches that have been developed. We study the effects of capacitor degradation on DC-DC converter performance by developing a combination of a thermal model for ripple current effects and a physics of failure model of the thermal effects on capacitor degradation. The derived degradation model of the capacitor is reintroduced into the DC-DC converter model to study changes in the system performance using Monte Carlo methods. The simulation results observed under different conditions and experimental setups for model verification are discussed. The paper concludes with comments and future work to be done.

关键词： DC-DC converters

来源：评论

学校读者我要写书评

暂无评论

Composite hypothesis testing with intermittent observations

Composite hypothesis testing with intermittent observations

引用

作者： Tantawy, Ashraf Koutsoukos, Xenofon Biswas, Gautam Institute for Software Integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN 37235 United States

ISBN: (纸本)9783902661463

In this paper, we consider the detection problem with intermittent observations, due to the unreliable shared communication link between local sensors and the fusion center. Detection performance is analyzed using Neyman-Pearson criterion of maximizing the probability of detection, for a given probability of false alarm. The detector performance is compared, with and without intermittent observations, and a formal approach is presented to restore the original detector performance. © 2009 IFAC.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

Baseline efficiency in EPON based architecture to inter-network substations

Baseline efficiency in EPON based architecture to inter-netw...

引用

2009 2nd International Conference on computer, Control and Communication, IC4 2009

作者： Raza, Ali Ullah, Khalil Ahmed, Saleem Ahmed, Salman Jang, Hyuk-Soo Yang, Hyo-Sik Department of Computer Software Myongji University Yongin Korea Republic of Department of Electronics and Communication Engineering Myongji University Yongin Korea Republic of Department of Computer Engineering Sejong University Seoul Korea Republic of Department of Computer Systems Engineering Mehran University Jamshoro Pakistan

ISBN: (纸本)9781424433148

The design of cost-effective, interoperable, and efficient communication architecture is indeed one of the pressing needs not only for the realization of substation automation (SA) as per specification of IEC61850 but also to inter-connect different substations with minimum cost to bring data from all substations on the single information highway thereby paving a smooth way to centralize all the available information. Ethernet technology has dramatically changed the communication trend because of its availability, efficiency, cost effectiveness, proven interoperability, and capability to drive on-demand bandwidth as per incremental growth and expansion of the network and on the other hand optical fiber communication system is one of the technically attractive communication medium due to its high capacity, efficiency, and security. Therefore, EPON (Ethernet Passive Optical Network) is the desired communication paradigm for the SA as it is shipped with the two most demanding communication trends, i.e., Ethernet and Fiber Optics in a single package. EPON underscores the importance of not only last-mile operability for inter-connecting different substations but can also play a vital role when ATM is replaced with GPON (Gigabit Passive Optical Network) for the long-haul communication thereby saving the cost of protocol conversion. In this paper we propose EPON as the desired communication architecture for inter-connecting substations and present analysis related to the significant importance of EPON with respect to the deployment in the substation environment both internally and externally. Finally we show the result of simulations to validate the deployment and effectiveness of our purposed communication paradigm for substation.

关键词： Cost effectiveness

来源：评论

学校读者我要写书评

暂无评论

Gigabit Ethernet based substation under IEC61850 standard

Gigabit Ethernet based substation under IEC61850 standard

引用

2009 2nd International Conference on computer, Control and Communication, IC4 2009

ISBN: (纸本)9781424433148

Communication architecture for substation automation is one of the challenging and subtle tasks to address in order to visualize the substation into digital world under the umbrella of IEC61850. Communication paradigm for substation automation demands critical importance because of two reasons;as communication arena is changing day by day so it is convenient to opt for something that is simple to deploy and incur a less cost in terms of time and asset when migration is to be considered since data-intensive applications drive the incremental demand for bandwidth as per growing need with the expansion of concerned network and last but not least the interoperability as it is one of the core constrained put by IEC61850 for substation automation. So it is viable to consider Ethernet as the most promising solution for the communication architecture of substation automation as Ethernet technology has changed the trend of communication network because of its availability, efficiency, and cost effectiveness on the other hand interoperability is assured based on the proven and highly deployed industrial Ethernet. This paper presents analysis and the crucial need for the deployment of Gigabit Ethernet in the substation and also presents how Ethernet technology can help in the substation automation as a long run solution in the changing arena of communication as Ethernet is one of the most pervasive communication technologies. In the end we have performed simulations in NS-2 to prove that our suggested communication paradigm is optimal in various regards by keeping into consideration the constraints imposed by IEC61850.

关键词： Ethernet

来源：评论

学校读者我要写书评

暂无评论

Investigating Security Threats in Information systems

Investigating Security Threats in Information Systems

引用

12th International-Business-Information-Management-Association Conference

作者： Samy, Ganthan Narayana Ahmad, Rabiah Ismail, Zuraini Department of Computer Systems and Communications Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia (UTM) Malaysia Centre for Advanced Software Engineering (CASE) Faculty of Computer Science and Information Systems Universiti Teknologi Malaysia (UTM) Malaysia Department of Science College of Science and Technology Universiti Teknologi Malaysia (UTM) Malaysia

ISBN: (纸本)9780982148914

Information security surveys are important inputs to private, public and government sectors in order to measure current status of information security threats. This paper examines the various types of threats that exist in Information systems (IS) in one of government supported hospital in Malaysia. The hospital has been equipped for a Total Hospital Information System (THIS). The data collected were from three different departments using in-depth structured interviews. The study identified 22 types of threats according to major threat categories based on ISO/IEC 27002 (ISO 27799:2008). The result shows that the most critical threat for the THIS is the power failure followed by acts of human error or failure and other technological factors. This research holds significant value in terms of providing a comprehensive list of potential threat categories in IS and subsequently taking the results of this step as input for the risk mitigation strategy. Keywords: Healthcare Information systems (HIS), Information systems (IS), Risk Analysis, Threats

关键词： Healthcare Information systems (HIS) Information systems (IS) Risk Analysis Threats

来源：评论

学校读者我要写书评

暂无评论

A heuristic process for local inconsistency diagnosis in firewall rule sets

引用

Journal of Networks 2009年第8期4卷 698-710页

作者： Pozo, S. Ceballos, R. Gasca, R.M. Department of Computer Languages and Systems Computer Engineering High School University of Seville Spain

Writing and managing firewall ACLs are hard and error-prone tasks for a wide range of reasons. During these tasks, inconsistent rules can be introduced. An inconsistent firewall ACL implies in general a design error, and indicates that the firewall is accepting traffic that should be denied or vice versa. However, the administrator is who ultimately decides if an inconsistent rule is a fault or not. Although many algorithms to diagnose inconsistencies in firewall ACLs have been proposed, they have different drawbacks regarding many aspects of the consistency management problem, which can prevent their use in a wide range of real-life situations. The most important one is that they give complete and minimal results, but their algorithmic complexity is too high, making the problem intractable for even reasonably-sized ACLs. In this paper we present an analysis of the consistency diagnosis problem in firewall ACLs. Based on this analysis, we propose to split the process in several parts that can be solved sequentially: inconsistency detection and isolation, inconsistent rules identification, and inconsistency characterization. Our algorithms are the first which can solve the detection, isolation, and identification problems in quadratic time complexity, giving complete but not necessarily minimal results. A theoretical complexity analysis as well as experimental results with real ACLs is given. © 2009 ACADEMY PUBLISHER.

关键词： Parallel processing systems

来源：评论

学校读者我要写书评

暂无评论

Architecture Based Reliability and Testing Estimation for Mobile Applications

Architecture Based Reliability and Testing Estimation for Mo...

引用

作者： Wadhwani, Vickey Memon, Fiaz Hameed, M. Muzaffar Blekinge Institute of Technology Department of Systems and Software Engineering Sweden University of Sindh Institute of Mathematics and Computer Science Jamshoro Pakistan

ISBN: (纸本)9783540898528

We propose an architecture-based testing and reliability framework for mobile applications. During our literature study, we explored some of the software testing and reliability techniques available, as well as investigating the techniques that are being used by industry. This paper presents case studies of two companies that are developing mobile applications. These are helpful for finding the strengths and weaknesses of existing software testing and reliability techniques. In light of these strengths and weaknesses, we propose a framework of architecture-based software testing and reliability estimation for mobile applications. © Springer-Verlag Berlin Heidelberg 2008.

关键词： software reliability

来源：评论

学校读者我要写书评

暂无评论

Dependable workflow scheduling in global grids

Dependable workflow scheduling in global grids

引用

2009 10th IEEE/ACM International Conference on Grid Computing, Grid 2009

作者： Rahman, Mustafizur Ranjan, Rajiv Buyya, Rajkumar Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia Service Oriented Computing Research Group School of Computer Science and Engineering University of New South Wales Australia

ISBN: (纸本)9781424451494

In this paper, a reputation-based Grid workflow scheduling algorithm is proposed to counter the effect of inherent unreliability and temporal characteristics of computing resources in large scale, decentralized Grid overlays. The proposed approach builds upon structured peer-to-peer indexing and overlay networking techniques to create a scalable wide-area networking of Grid sites for supporting dependable scheduling of applications. The scheduling algorithm considers reliability of a Grid resource as a statistical property, which is globally computed in the decentralized Grid overlay based on dynamic feedbacks or reputation scores assigned by individual service consumers (Grid Resource Brokers). The proposed algorithm can dynamically adapt to changing resource conditions and offer significant performance gains as compared to traditional approaches in the event of unsuccessful job execution or resource failure. We evaluate and demonstrate the feasibility of our approach through an extensive trace driven simulation. The results show that our scheduling technique can reduce the makespan up to 50% and successfully isolate the failure-prone resources from the system. © 2009 IEEE.

关键词： Scheduling algorithms

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：