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International Conference on Computational Intelligence and software Engineering (CiSE)

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

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.

关键词： Web services Quality of service Simple object access protocol Web and internet services computer science Laboratories software quality software testing Costs Time factors

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Quality Evaluation and Selection Framework of Service Composition Based on Distributed Agents

Quality Evaluation and Selection Framework of Service Compos...

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International Conference on Next Generation Web Services Practices (NWeSP)

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

In this paper, we propose a integrate framework for evaluation and selection of service composition based on distributed agent. Meanwhile, a distributed method, which is used for acquiring the user-based quality data of Web services (WSs) from the agents scattered in the network, is introduced. In the framework, the location and time factor, concerning quality of Web service composition, is considered. The procedure for processing the quality of Web service extends from single location to multiple locations. And the service is invoked by end-user under different times. By studying service quality of a lot of historic data in the evaluation framework, the LOA algorithm, which considers location and time factor, is developed to optimize quality of service composition. From the view of the end-user, the distribution agents with different physical locations can improve quality of composite service. In the last part of the paper, pros and cons of framework and complexity of algorithm are discussed in detail.

关键词： Web services Web and internet services Time factors Quality of service software quality Application software IP networks Simple object access protocol computer science Scattering

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Test Case Reuse Based on Ontology

Test Case Reuse Based on Ontology

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Pacific Rim International Symposium on Dependable Computing

作者： Lizhi Cai Weiqin Tong Zhenyu Liu Juan Zhang School of Computer Engineering and Science Shanghai University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China

Test cases are one of the most important assets in the testing process. This paper presents the testing ontology based SWEBOK and software quality model. The management and retrieval of test cases will play a vital role in test cases reuse. The keyword-based, as well as facet-based retrieval cannot meet user's flexible query requirement because of lack of semantic information. SWEBOK provides a broad agreement on the content of the software engineering discipline. At last this paper discusses the management and retrieval of test cases based on the semantic similarity of two test concepts in two ontologies according to difference sets of superconcept, subconcept, extension, and intension.

关键词： Ontologies software testing Information retrieval Costs software quality software engineering Performance evaluation Research and development Laboratories Object oriented modeling

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A Dynamic Metrics Method for Test Case Reuse Based on Bayesian Network

A Dynamic Metrics Method for Test Case Reuse Based on Bayesi...

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International Conference on Computational Intelligence and software Engineering (CiSE)

作者： Zhang Juan Lizhi Cai Weiqing Tong Zhenyu Liu Ying Li Shanghai University Shanghai Shanghai CN School of Computer Engineering and Science Shanghai University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating & Testing Shanghai China

How to measure reuse capability of a test case is critical in software test reuse research. A dynamic method based on Bayesian network is proposed for measure the reuse of test case. It collects the information of user's searching and reusing test cases, and then analysis the test case's reuse capability which give basis for consulting to users. The prominent characteristic of this method is that the reuse of test case is divided into three aspects in terms of different reuse preference that improve the accuracy of metric.

关键词： Bayesian methods software testing Costs software reusability computer networks software measurement software libraries Embedded software Laboratories Finance

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Analyzing Reliability of Time Constrained Service Composition

Analyzing Reliability of Time Constrained Service Compositio...

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International Conference on computer and Information Science (ACIS)

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

As a way to compose independent services 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. Because the participating services may be failure or unavailable, how to guarantee the quality of service composition has become a challenging problem. A service composition model based on Timed Petri net (SCTPN) is proposed in this paper, which is capable of accurately capturing transaction behaviors and time constraints of services. The basic relationships and failure processing strategies between services are also characterized by SCTPN model. Based on states of the constructed SCTPN model, we propose the concepts of greatest concurrent set and transfer matrix to analyze reliability related properties of SCTPN model. Two simplification schemas are established to reduce the complexity of computation. Finally, three specific experiments are conducted to explain the effectiveness of proposed method.

关键词： Time factors Distributed computing Quality of service computer science Reliability engineering Petri nets computer networks Web services Information science Information analysis

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Combination of Wavelet Packet Transform and Hilbert-Huang Transform for Recognition of Continuous EEG in BCIs

Combination of Wavelet Packet Transform and Hilbert-Huang Tr...

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2009 2nd IEEE International Conference on computer Science and Information Technology(第二届计算机科学与信息技术国际会议 ICCSIT2009)

作者： Ling Yuan Banghua Yang Shiwei Ma Biao Cen Shanghai Key Laboratory of Power Station Automation Technology Department of Automation College of Department of Software Testing Tech-Front Computer Co.Ltd Shanghai China

An improved Hilbert-Huang transform(HHT) combined with wavelet packet transform(WPT) is proposed for recognizing continuous electroencephalogram(EEG) in brain computer interfaces(BCIs). The HHT consists of empirical mode decomposition(EMD) and Hilbert–Huang spectrum(HHS). Firstly, the WPT decomposes the signal into a set of narrow band signals, then a series of Intrinsic Mode Functions(IMFs) can be obtained after application of the EMD. Whereafter, two kinds of screening processes are conducted on the first two IMFs of each narrow band signal to remove unrelated IMFs. Hilbert Transform(HT) is then employed to calculate the HHS, from which energy changes in mu-rhythm and beta-rhythm can be recognized clearly. Datasets I of BCI competition IV 2008 are analyzed. The results show that the proposed method has better discriminability than the traditional HHT among different states. The proposed algorithm has the potentiality to trace mu-rhythm and betarhythm changes, which paves a way for a more enhanced BCI performance.

关键词： wavelet packet transform(WPT) Hilbert-Huang Transform(HHT) feature eztraction electroencephalogram (EEG) brain-computer interface(BCI)

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The Web Application Test Based on Page Coverage Criteria

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Journal of Donghua University(English Edition) 2008年第3期25卷 291-296页

作者：蔡立志童维勤杨根兴 School of Computer Engineering and Science Shanghai University The Key Lab of Software Testing and Evaluating

software testing coverage criteria play an important role in the whole testing *** current coverage criteria for web applications are based on program or *** are not suitable for black-box test or intuitional to *** paper defines a kind of test criteria based on page coverage sequences only navigated by web application,including Page_Single,Page_Post,Page_Pre,Page_Seq2,Page_*** test criteria based on page coverage sequences made by interactions between web application and browser are being under consideration after *** order to avoid ambiguity of natural language,these coverage criteria are depicted using Z formal *** empirical result shows that the criteria complement traditional coverage and fault detection capability criteria.

关键词： web application coverage criteria browser interaction Z formal language

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Practical Strategies to Improve Test Efficiency

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Tsinghua Science and Technology 2007年第S1期12卷 250-254页

作者：丁志刚汪泓澄凌良合 Shanghai Development Center of Software Technology Shanghai Key Laboratory of Computer Software Evaluating and Testing

This paper introduces strategies to detect software bugs in earlier life cycle stage in order to improve test efficiency. Static analysis tool is one of the effective methods to reveal software bugs during software development. Three popular static analysis tools are introduced, two of which, PolySpace and Splint, are compared with each other by analyzing a set of test cases generatedd by the authors. PolySpace can reveal 60% bugs with 100% R/W ratio (ratio of real bugs and total warnings), while Splint reveal 73.3% bugs with 44% R/W ratio. And they are good at finding different categories of bugs. Two strategies are concluded to improve test efficiency, under the guideline that static analysis tools should be used in finding different categories of bugs according to their features. The first one aims at finding bugs as many as possible, while the second concentrates to reduce the average time on bug revelation. Experimental data shows the first strategy can find 100% bugs with 60% R/W ratio, the second one find 80% bugs with 66.7% R/W ratio. Experiment results prove that these two strategies can improve the test efficiency in both fault coverage and testing time.

关键词： static analysis PolySpace splint software bug

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Practical Strategies to Improve Test Efficiency

Practical Strategies to Improve Test Efficiency

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第十二届全国容错计算学术会议

作者： DING Zhigang WANG Hongcheng LING Lianghe Shanghai Development Center of Software Technology Shanghai Key Laboratory of Computer Software Evaluating and TestingShanghai 201114China

This paper introduces strategies to detect software bugs in earlier life cycle stage in order to improve test efficiency. Static analysis tool is one of the effective methods to reveal software bugs during software development. Three popular static analysis tools are introduced, two of which, PolySpace and Splint, are compared with each other by analyzing a set of test cases generatedd by the authors. PolySpace can reveal 60％ bugs with 100％ R/W ratio (ratio of real bugs and total warnings), while Splint reveal 73.3％ bugs with 44％ R/W ratio. And they are good at finding different categories of bugs. Two strategies are concluded to improve test efficiency, under the guideline that static analysis tools should be used in finding different categories of bugs according to their features. The first one aims at finding bugs as many as possible, while the second concentrates to reduce the average time on bug revelation. Experimental data shows the first strategy can find 100％ bugs with 60％ RAN ratio, the second one find 80％ bugs with 66.7％ R/W ratio. Experiment results prove that these two strategies can improve the test efficiency in both fault coverage and testing time.

关键词： static analysis PolySpace splint software bug

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A Reliability Evaluation Framework on Service Oriented Architecture

A Reliability Evaluation Framework on Service Oriented Archi...

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International Conference on Pervasive Computing and Applications (ICPCA)

作者： Zhenyu Liu Ning Gu Genxing Yang Department of Computing and Information Technology Fudan University China Shanghai Key Laboratory of Computer Software Evaluating and Testing China

SOA, service oriented architecture, is becoming popular and the prevalent approach for realizing modern services and system. And how to carry out quality control according to the method of SOA is now being widely studied. Especially, the QoS based on composition of Web service has been studied widely. In this paper, the study mainly concerns the reliability under the environment of SOA. A novel framework of evaluation under reliability has proposed. At the same time, the evaluation model is based on decomposition of reliability quality that used in pervasive computing. This framework brought forward considering the quality information of Web service composite by defining specific reliability evaluation characteristics in Web service. The reliability of SOA can be improved under the given case in practice.

关键词： Service oriented architecture Web services Quality of service Simple object access protocol Quality control Pervasive computing Application software XML Information technology Laboratories

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