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International Conference on computer Supported Cooperative Work in Design

作者： Tiejiang Liu Tun Lu Zhenyu Liu School of Computer Science Fudan University Shanghai China Evaluating and Testing Shanghai Key Laboratory of Computer Software Shanghai China

In service oriented cloud, in order to meet the different users' service requirements, the cloud venders need to manage the service applications' deployment effectively first. During the deployment process, the deployment costs and the influence of service deployment to the cloud are very important issues to be paid attention to, which lacks in current research. In this paper, we design a novel optimization approach for service deployment to address above issues, which works in a service deployment framework. The approach can improve the deployment efficiency and reduce the deployment costs. Atom-services, the basic units of service application, are partitioned to different service families with its compatibility and installation policy. We present three algorithms to automatically standardize the installation expressions, simplify and optimize the installation expression series during the service deployment process respectively. An analysis about the service deployment result is given in the paper and the experiment data demonstrates the approach's efficiency.

关键词： Cloud computing Application software Cost function Design optimization computer science Collaborative work Laboratories software testing Conference management Partitioning algorithms

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Quantifying software security based on stochastic Petri nets

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Journal of Computational Information Systems 2010年第9期6卷 3049-3056页

作者： Yang, Nianhua Yu, Huiqun Sun, Hua Qian, Zhilin Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China

To quantitatively predict software security, a component security model is proposed based on Stochastic Petri Nets (SPNs). An isomorphic Markov Chain (MC) is obtained from the component SPN model. A quantitative security evaluation prediction method is proposed. The prediction value is calculated according to the steady states probability distribution of MC, obtained from a software SPN model. Sensitivity analysis method is proposed. It provides a mean to trace back to the critical components for security enhancing. A case study shows the applicability and feasibility of our method. © 2010 Binary Information Press.

关键词： Sensitivity analysis

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Agent-Based Online Quality Measurement Approach in Cloud Computing Environment

Agent-Based Online Quality Measurement Approach in Cloud Com...

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Zhenyu Liu Tiejiang Liu Tun Lu Lizhi Cai Genxing Yang School of Computer Science Fudan University China Shanghai Key Laboratory of Computer Software Evaluating and Testing China

This paper studies online quality measurement in cloud computing environment. The paper analyzes concentration measure evaluation method of the current software quality evaluation system. As is known to all, the existing evaluation technology uses concentrated evaluation before run-time. By testing and analyzing results, the quality is obtained. In this paper, by analyzing the features in cloud computing environment, we consider that service-oriented evaluation should be mainly based on runtime online measurement. The paper puts forward agent-based online measure infrastructure, which is evaluated by distributed assessment in service computing environment A quality model and corresponding online data collection strategy are described. In this approach, the previous quality evaluation, which is concentrated and simulating in a simulated environment, is substituted. Then, a novel measure method of quality data acquisition, which is based on distributed agent technology, is established. So, during online service operation, the obtained data can make measurement results to be accurate and credible.

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Analyzing Real-time Schedulability of Resource-oriented Distributed Real-time Embedded software

Analyzing Real-time Schedulability of Resource-oriented Dist...

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2010 2nd IEEE International Conference on Information Management and Engineering(2010年IEEE第二届信息管理与工程国际会议 IEEE ICIME 2010)

作者： Liqiong Chen Yunxiang Liu Guisheng Fan Department of Computer Science and Information EngineeringShanghai Institute of Technology Shanghai Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China Departme

As computer systems become increasingly internetworked, Distributed Realtime Embedded (DRE) software is becoming increasingly common and important, a challenging problem faced by researchers and developers of DRE software is how to devise and implement a method that can effectively analyze requirements in varying operational conditions. In this paper, a Distributed Realtime Embedded net (DREN) is proposed as software design specification modeling tool. The basic tasks, function module and communication process are modeled by using DREN, thus forming the entire application by making use of Petri net’s synthesis operation. Time Reachability Graph is adopted to analyze the correctness of DRENmodel, the basic properties of DRE system are also considered. Finally, a specific example is given to simulate the analytical process, the results show that the method can be a good solution to analyze DRE software.

关键词： Embedded software Real time systems Distributed computing Embedded computing Information analysis computer science Application software Processor scheduling Laboratories software testing

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Verifying web services composition based on interface automata using SPIN

International Journal of Digital Content Technology and its ...

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International Journal of Digital Content Technology and its Applications 2010年第8期4卷 23-33页

作者： Mei, Jia Miao, Huaikou Chen, Yihai Gao, Honghao School of Computer Engineering and Science Shanghai University Shanghai 200072 China Department of Computer Information and Management Guangxi University of Finance and Economics Nanning 530003 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China State Key Laboratory of Software Engineering in Wuhan University Wuhan 430072 China

Web services are a very appropriate communication mechanism to perform distributed business processes among several organizations. These processes should be reliable, because a failure in them can cause high economic losses. To provide a framework to compose lots of specialized services flexibly, BPEL4WS is proposed to describe Web services composition. But the language is lack of the support for checking the correctness of composition. It has to depend on formal verification method which helps to check the correctness of services composition. In order to solve above shortages of BPEL4WS, This paper presents a formal approach which verifies BPEL4WS using the interface automata. In this approach, BPEL4WS is mapped into interface automata, which is then transformed into Promela (It is the input language of SPIN model checker.), and the correctness properties of Web services composition can be verified by SPIN. Finally, paper gives a case study to illustrate the proposed approach.

关键词： Web services

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An approach to formally modeling and verifying distributed real-time embedded software

Journal of Software

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Journal of software 2010年第9期5卷 990-997页

作者： Chen, Liqiong Fan, Guisheng Liu, Yunxiang Department of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai China Department of Computer Science and Engineering East China University of Science and Technology Shanghai China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China

As computer systems become increasingly internetworked, Distributed Real-time Embedded (DRE) systems has became increasingly common and important, a challenging problem faced by researchers and developers of DRE software is devising and implementing an method that can effectively analyze requirements in varying operational conditions. In this paper, a Hierarchical Distributed Realtime Embedded net (HDRE-net) is proposed as software analysis tool. The basic task, function module and communication process are modeled by using HDRE-net, thus forming the whole application through the synthesis operation of Petri net. Time Reachability Graph is adopted to analyze the correctness of HDRE-net, the basic properties of DRE software are also considered. Finally, a specific example is given to simulate the analysis process, and the results show that the method can be a good solution to analyze DRE software. © 2010 Academy Publisher.

关键词： Petri nets

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Feature-based similarity retrieval in Content-based image retrieval

Feature-based similarity retrieval in Content-based image re...

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7th Web Information Systems and Applications Conference, WISA 2010, 5th Workshop on Semantic Web and Ontology, SWON 2010, 4th Workshop on Electronic Government Technology and Application, EGTA 2010

作者： Xu, Junling Xu, Baowen Men, Shuaiqiu School of Computer Science and Engineering Southeast University China Shanghai Key Laboratory of Computer Software Testing and Evaluating China Department of Computer Science and Technology Nanjing University Nanjing China School of Engineering Hong Kong University of Science and Technology Hong Kong School of Engineering Hong Kong University of Science and Technology China

ISBN: (纸本)9780769541938

Content-based image retrieval (CBIR), providing query by image examples other than key words, is a hot topic in recent years. Querying by words mainly depends on the performance of crawler, whereas query by example is more unpredictable, since feature extraction is still challenging due to the rich content of the image. This paper focuses on the issue of similarity retrieval in high-dimensional space, a problem of performing nearest-neighbor queries efficiently and effectively over large high-dimensional databases. Although some arguments have advocated that nearest-neighbor queries do not even make sense for high-dimensional data, we review the existing techniques of working in vector space of high dimension, and provide our unique view towards the issue of time complexity and precision during similarity retrieval in CBIR. © 2010 IEEE.

关键词： Vector spaces

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An approach to analyzing user preference based dynamic service composition

Journal of Software

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Journal of software 2010年第9期5卷 982-989页

作者： Fan, Guisheng Yu, Huiqun Chen, Liqiong Yu, Caizhu Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China Department of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai 200235 China

As a way to compose independent service together to fulfill a function, service composition is an important means for flexible and rapid information integration of complex distribution application in open and heterogeneous environment. However, the diversity of requirements makes it difficult to guarantee the correctness of service composition. This paper proposes a hierarchical dynamic service composition net (HDSC-net), and user's preference based mechanism for service composition. HDSC-net is used to model operation, the relationships between operations, operation mapping, and user's preference. Transfer matrix is constructed to express the relationships between states, while theories of Petri nets help prove the composability of service. The strategy for dynamic service composition and its corresponding enforcement method are also proposed. A case study of Travel Service demonstrates the applicability of proposed method and its effectiveness. © 2010 Academy Publisher.

关键词： Web services

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Test Case Reusability Metrics Model

Test Case Reusability Metrics Model

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International Conference on computer Technology and Development (ICCTD)

作者： Zhang Juan Lizhi Cai Weiqing Tong Yuan Song Li Ying School of Computer Engineering and Science Shanghai University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating & Testing Shanghai China Jiangxi University of Finance and Economics Jiangxi China East China University of science and technology Shanghai China Nanjing XiaoZhuang University NanJing China

As organizations implement systematic reuse test cases in software testing to improve productivity and quality, they must be able to measure reusability of test case and identify the most effective reuse strategies. This is done with Test Case Reusability Metrics Models(TCRMM). In this article we survey metrics of test case reusability, and provide reusability factors division that will help establish reusability assessment model. It combines four metrics factors into reusability metrics based on analytic hierarchy process. The prominent characteristic of this model is that the process of reusability metric is automated when the judgment matrix has been constructed.

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A novel web service selection based on dynamic quality evaluation

A novel web service selection based on dynamic quality evalu...

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2009 International Conference on Computational Intelligence and software Engineering, CiSE 2009

作者： Liu, Zhenyu Liu, Tiejiang Cai, Lizhi Yang, Genxing School of Computer Science Fudan University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China

ISBN: (纸本)9781424445073

This paper proposes a novel method of Web service selection for the better quality based on environment of dynamic evaluating system. The evaluating system considered the end-user for the quality of service. This QoS evaluation framework which carries out a dynamic method of acquiring the quality data in the Web service composition based on the end-user feeling of web services. The procedure of processing the quality of service is extended quality of single service to multiple factor. Considering the end-user's perception, the distribution of dynamic evaluation can greatly improve the quality of Web service and its composition, which is not just adjusted according to end-user's requirements. A novel service selected algorithm with QoS is also presented in the paper, which chooses the different composition execute path to get optimized quality. Some experiments are illustrated to demonstrate effective. ©2009 IEEE.

关键词： Quality of service

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