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Performance evaluation of recommender systems

International Journal of Performability Engineering 2017年第8期13卷 1246-1256页

作者： Chen, Mingang Liu, Pan Shanghai Key Laboratory of Computer Software Testing and Evaluating Shanghai201112 China Shanghai Development Center of Computer Software Technology Shanghai201112 China Shanghai Business School Shanghai201112 China

Recommender systems play an important role in e-commerce. This paper discusses three classical methods-offline analytics, user study, and online experiment-to evaluate the performance of recommender systems and also analyzes their application scenarios. Some performance evaluation metrics of recommender systems are reviewed and summarized from four perspectives (machine learning, information retrieval, human-computer interaction and software engineering) combined with the above three evaluation methods. These evaluation methods and evaluation metrics summarized in the paper provide the designers with guidance for the comprehensive evaluation and selection of recommended algorithms. © 2017 Totem Publisher, Inc. All rights reserved.

关键词： Recommender systems

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Credit evaluation of gas consumers by combining hierarchy analysis with clustering

Credit evaluation of gas consumers by combining hierarchy an...

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International Conference on computer and Information Science (ACIS)

作者： Wenqing Xu Huiqun Yu Jianmei Guo Jinglei Shen Huaiying Sun Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China Department of Computer Science and Engineering East China University of Science and Technology Shanghai China

ISBN: (纸本)9781509055081

Credit evaluation of customer is an important task for gas companies to achieve marketing management, and is of great significance to improve the economic efficiency of enterprises. By analyzing various factors influencing gas customer credit, a gas customer credit index hierarchy is established. Then, based on the credit index hierarchy, this paper proposes a hybrid credit evaluation method by cluster analysis and analytic hierarchy process(AHP). This method first divides gas customers into different groups by cluster analysis, then determines the credit index weight by AHP, and finally evaluates gas customer credit rating by combining the above two results. The empirical analysis of the actual data of a gas company shows that as a synthesis of customer data's statistical properties and gas professionals' actual work experience, this model can evaluate gas customer credit rating rationally and effectively.

关键词： Indexes Analytic hierarchy process Clustering algorithms Algorithm design and analysis Safety Companies Economics

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Mini-XML: An efficient mapping approach between XML and relational database

Mini-XML: An efficient mapping approach between XML and rela...

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International Conference on computer and Information Science (ACIS)

作者： Huchao Zhu Huiqun Yu Guisheng Fan Huaiying Sun Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China Department of Computer Science and Engineering East China University of Science and Technology Shanghai China

ISBN: (纸本)9781509055081

In recent years, XML technology has won wide attention from both industry and academic. It can be used to mark data, define the data type and their own markup language. It is a cross-platform, context-dependent technology in the Internet environment and an effective tool for todays distributed structure information. The S-XML is a new approach for storing semi-structured data, and it supports query of the node in XML with SQL statements, which has shown impressive performance on many classic data sets. However, it is difficult to store XML data into a relational database, and the S-XML spends much more time and space to store the data. In this paper, we propose an efficient mapping approach, the mini-XML, to mapping XML into the relational database. In addition, path technique and position information are used to indicate the complex node relationship. Finally, two experiments are conducted to prove that the proposed method can achieve better performance in the decreasing of the storage time and storage space, especially dealing with the large amount of data.

关键词： XML Mini-XML Semi-structured Path technique extensible markup language Relational databases data types symbolic languages storage spaces MAPPING(MATHEMATICAL) mapping

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Analysis of quality evaluation based on ISO/IEC SQuaRE series standards and its considerations

Analysis of quality evaluation based on ISO/IEC SQuaRE serie...

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International Conference on computer and Information Science (ACIS)

作者： Yi Zhao Jiayu Gong Yun Hu Zhenyu Liu Lizhi Cai Shanghai Ruanzhong Information Technology Co. Ltd Shanghai Industrial Technology Institute Shanghai China Shanghai Key Laboratory of Computer Software Testing &Evaluating Shanghai Development Center of Computer Software Technology

ISBN: (纸本)9781509055081

System and software quality evaluation is an important method of quality assurance, and its standardization provides quality requirements and evaluation supported by quality measurement. ISO/IEC organizations have also published a series of standards on system and software quality requirements and evaluation, which is significant for assuring the quality of system and software. This paper introduces quality evaluation based on SQuaRE series standards, and analyzes the relationships among quality model, measurement, requirements, evaluation. Besides, considerations and suggestions are given when applying the measurement function to quality evaluation. Finally, comparison with different methods of quantifying quality characteristics and sub-characteristics with the measured values is analyzed.

关键词： IEC Standards ISO Standards software measurement software quality Mathematical model

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Research on service recommendation reliability in mobile computing

Research on service recommendation reliability in mobile com...

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International Conference on software Engineering Research, Management and Applications (SERA)

作者： Weng Wen HuaiKou Miao School of Computer Engineering and Science Shanghai University Shanghai China College of Computer and Information Engineering Shanghai Polytechnic University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating & Testing Shanghai Shanghai China

Web services bring more conveniences for users and developers. However, it makes user face the problem of service information explosion. The personalized service recommendation solves the problem. This paper proposes a method to predicting the system reliability which bases on user context information in mobile computing environment. The method construct user behavior model by formatting user location context and then quantitative verification is performed to estimating whether the recommended service meet the requirements of users. Finally, experiments are carried out to demonstrate the effectiveness of our method.

关键词： Context Reliability Mobile handsets Hidden Markov models Web services Mobile computing Context modeling

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Modeling and optimizing CPS software testing based on petri nets

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International Journal of Performability Engineering 2017年第8期13卷 1183-1194页

作者： Chen, Liqiong Fan, Guisheng Yu, Huiqun Department of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai200235 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai201112 China Department of Computer Science and Engineering East China University of Science and Technology Shanghai200237 China

software testing is an important means to ensure the quality of software. However, there is a lack of effective modeling and optimization of CPS software testing. In this paper, Petri nets are used to model the underlying devices, components, connectors and test cases of CPS software. Aspect oriented programming extracts the crosscutting concerns of CPS software testing. The behaviors and their relationships are described based on AOP, and a weaving mechanism is used to dynamically integrate these models into the test model of CPS. The correctness of the model is analyzed by using the operation semantics and related theories of Petri nets. Based on the state space of constructed model, a strategy is proposed to dynamically select the test suite. The experiment results show that this method can effectively describe the CPS software testing process, which can improve the quality of software testing. © 2017 Totem Publisher, Inc. All rights reserved.

关键词： software testing

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SDN-based approach to generating and optimizing test path for cloud application

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International Journal of Performability Engineering 2017年第8期13卷 1257-1267页

作者： Chen, Liqiong Liu, Yunxiang Fan, Guisheng Department of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai200235 China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai201112 China Department of Computer Science and Engineering East China University of Science and Technology Shanghai200237 China

With the intensive and large-scale development of cloud computing, software testing has become one of the most important problems. How to evaluate and assess the testing process of a cloud computing system is a key to the deployment and use of it. This paper proposes a method to generate and optimize test paths of cloud application based on SDN, which separates the cloud service testing process from the underlying execution logic, thus improving the scalability of the testing process. The finite state machine (FSM) is used to establish the formal description language of the cloud application testing process, and is also used to model the basic elements, such as cloud services, jobs, test cases and cloud applications, and construct a test model for cloud application. The related theory of FSM is used to analyze the effectiveness and correctness of cloud application test model. Based on the actual mapping of the model, the generation method of test path is also given. In addition, we analyze the coverage of test cases and propose the test path optimization methods to improve the test efficiency. The specific examples and simulations show that this method can simplify the design and analysis of the cloud application testing process and effectively improve the generation of test paths. © 2017 Totem Publisher, Inc. All rights reserved.

关键词： Verification

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An empirical study on clustering approach combining fault prediction for test case prioritization

An empirical study on clustering approach combining fault pr...

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International Conference on computer and Information Science (ACIS)

作者： Lei Xiao Huaikou Miao Weiwei Zhuang Shaojun Chen School of Computer Engineering and Science Shanghai University Shanghai China School of Computer and Information Engineering Xiamen University of Technology Xiamen China Shanghai Key Laboratory of Computer Software Testing & Evaluating Shanghai China Meitu corporation Xiamen China

ISBN: (纸本)9781509055081

Using Clustering algorithm to improve the effectiveness of test case prioritization has been well recognized by many researchers. software fault prediction has been one of the active parts of software engineering, but to date, there are few test cases prioritization technique using fault prediction. We conjecture that if the code has a fault-proneness, the test cases covering the code will find fault with higher probability. In addition, most of the existing test cases prioritization techniques using clustering algorithm don't consider the number of clusters. Thus, in this paper, we design a test case prioritization based on clustering approach combining fault prediction. We consider the method to obtain the best number of clusters and the clustering prioritization based on the results of fault prediction. To investigate the effectiveness of our approach, we perform an empirical study using an object which contains test cases and faults. The experiment results indicate that our techniques can improve the effectiveness of test case prioritization.

关键词： Clustering algorithms Prediction algorithms Feature extraction software testing Complexity theory Algorithm design and analysis

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A study for extended regular expression-based testing

A study for extended regular expression-based testing

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International Conference on computer and Information Science (ACIS)

作者： Pan Liu Jun Ai Zhenning Jimmy Xu College of Information and Computer Shanghai Business School Shanghai China Shanghai Key Laboratory of Computer Software Testing and Evaluating Shanghai China School of Reliability and System Engineering Beihang University Beijing China School of business University of Southern Maine USA

ISBN: (纸本)9781509055081

software testing has become an essential activity to guarantee software quality. To reduce the overall cost of software testing, model-based testing has been widely studied in the past two decades and Finite State Machine (FSM) is used to build the model of software behaviors. However, due to the inadequacy of the modeling ability of FSM, FSM-based testing cannot be taken as a test oracle to solve all issues in software testing. To improve the modeling capability of the model, a few researchers have proposed using Extended Regular Expressions (ERE) to model software behaviors. This paper reviews the method of the ERE-based testing and presents six modeling rules to convert program codes to the ERE model. Then, a case is adopted to illustrate the process of generating executable paths from the ERE model and the method of designing test cases by those paths. Compared with the traditional graphic traversal method of constructing executable paths from the program, ERE not only has robust modeling capability to describe more types of software behaviors than FSM, but also can be used to construct effective executable paths to detect program errors.

关键词： software software testing Algorithm design and analysis Mathematical model Switches Business

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The interchange format of tabular expressions using XML 5th

The interchange format of tabular expressions using XML

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5th International Workshop on Structured Object-Oriented Formal Language and Method, SOFL+MSVL 2015

作者： Huang, Mao Chen, Yihai Khedri, Ridha Miao, Huaikou School of Computer Engineering and Science Shanghai University Shanghai China Shanghai Key Laboratory of Computer Software Evaluating and Testing Shanghai China Department of Computing and Software McMaster University HamiltonON Canada

ISBN: (纸本)9783319312194

Tabular expressions, also called tables, are formal notations using tables to organize mathematical functions and relations. They have been widely used in documenting and analyzing software specification. Different tools are developed to support tabular expressions. To further enhance tables’ usage, a convention on storing and parsing tables is required. This paper presents a canonical interchange format for tabular expressions based on XML. This format captures four aspects of tables: the constituent, dynamic, representation and additional information. Our proposal builds on syntax definition of tables and is tailored to provide flexibility in manipulation of table content. It is suitable for existing and emerging kinds of tables. This study facilitates the interchange between different tools for tabular expressions, which would prevent developer’s repetitive work. © Springer International Publishing Switzerland 2016.

关键词： Formal methods

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