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Towards common acquaintance immunization strategy for complex network

Information Technology Journal 2009年第8期8卷 1129-1139页

作者： Liu, Pan Miao, Huaikou Mei, Jia School of Computer Engineer and Science Shanghai University Shanghai 200072 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai 201112 China

The study presents a new immunization strategy for computer networks and populations with board and, in particular, scale-free degree distributions. The proposed strategy calls for the immunization of common acquaintances of random nodes (individuals). Similar to acquaintance immunization, our strategy also requires no knowledge of the node degrees or any other global information. Firstly, we analyze the successful and unsuccessful probability of acquaintance immunization with a simple example and the strategy ineffective reasons. Then, we study the probability of looking for common neighbors and present common acquaintance immunization strategy. Next, to compare common acquaintance immunization with acquaintance immunization, we implement a series of experiments from different aspects. The result of experiments shows that common acquaintance immunization gains higher stability and reliability for protecting complex network and can detect the structure of the unknown network. The conclusions of the study are that, compared with other immunization strategy, our approach requires no the whole information of complex network and efficiently immunizes the HUBS in complex network. © 2009 Asian Network for Scientific Information.

关键词： Complex networks

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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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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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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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The Multi-version and Single-display Strategy in Undo Scheme

The Multi-version and Single-display Strategy in Undo Scheme

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International Conference on computer and Information Technology (CIT)

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

ISBN: (纸本)076952432X

Consistency maintenance is one of the most significant challenges in groupware systems. In groupware systems, the effect of incorrect execution will be more extensive for it is done in distributed group editors, so the user will have more dependence on undo. While intention violation puzzle has never been addressed in any published work, it will destroy the consistency and lead to a crash. We propose a Mark & Retracing based method to reach the goal of consistency maintenance and achieve multi-version and single-display strategy in undo scheme. It is different from operation transformation method and provides a new perspective into group editors

关键词： Collaborative software Collaborative work Information technology Sun Laboratories software testing computer crashes Application software computer graphics computer networks

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