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AN INCREMENTAL UPDATING ALGORITHM FOR MINING ASSOCIATION RULES

Journal of Electronics(China) 2002年第4期19卷 403-407页

作者： Xu Baowen Yi Tong Wu Fangjun Chen Zhenqiang(department of computer science & engineering, Southeast University, Nanjing 210096) (National Key laboratory of software engineering, Wuhan University, Wuhan 430072) Department of Computer Science & Engineering Southeast University Nanjing National Key Laboratory of Software Engineering Wuhan University Wuhan

In this letter, on the basis of Frequent Pattern(FP) tree, the support function to update FP-tree is introduced, then an Incremental FP (IFP) algorithm for mining association rules is proposed. IFP algorithm considers not only adding new data into the database but also reducing old data from the database. Furthermore, it can predigest five cases to three *** algorithm proposed in this letter can avoid generating lots of candidate items, and it is high efficient.

关键词： Data mining Association rules Support function Frequent pattern tree

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Using a groupware technology to implement cooperative learning via the Internet - A case study 35

Using a groupware technology to implement cooperative learni...

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35th Annual Hawaii International Conference on System sciences, HICSS 2002

作者： Fuks, H. Gerosa, M.A. Pereira De Lucena, C.J. Catholic University of Rio de Janeiro PUC-Rio Software Engineering Laboratory Computer Science Department R. M. S. Vicente 225 - Gávea Rio de JaneiroRJ Brazil

ISBN: (纸本)0769514359

The Internet presents numerous new resources for teaching/learning. Despite this, it also brings many difficulties. To get around some of them, the AulaNet environment was developed in such a way that teachers could concern themselves about producing educational content while the environment manages the learners' navigation for them. Moreover, the environment offers integrated communication, coordination and cooperation services that can be added on to the course in order to supplement it. The course on "Information Technology Applied to Education" is wholly taught via the Internet though the AulaNet environment. The purpose of the course is to get students to learn to work with information technology as a group, turning them into Web-based educators. The class has been conducted since 1998. This paper reports how the AulaNet was configured and how its services aided in the creation and application of the course during the period from 1998 to 2001. The result of this work is an experience in which it has been possible to analyze development costs, updating and application, and to discern how to encourage learner participation, what the size of the ideal group should be, and a form of assessment of the learning experience based on cooperative activities. © 2002 IEEE.

关键词： Environmental management

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Comparisons of error control techniques for wireless video multicasting

Comparisons of error control techniques for wireless video m...

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Peng Ge P.K. McKinley Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

ISBN: (纸本)0780373715

This paper explores three different methods, employed separately and in combination, to improve the quality of video delivery on wireless local area networks. The approaches are: leader-driven multicast (LDM), monitoring MAC layer unicast (re)transmissions by other receivers; application-level forward error correction (FEC) using block erasure codes; negative feedback from selected receivers in the form of extra parity requests (EPR). The performance of these three methods is evaluated using both experiments on a mobile computing testbed and simulation. The results indicate that, while LDM is helpful in improving the raw packet reception rate, the combination of FEC and EPR is most effective in improving the frame delivery rate.

关键词： Error correction Forward error correction Paramagnetic resonance Wireless LAN Monitoring Unicast Negative feedback Mobile computing Testing Computational modeling

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Programming language support for adaptable wearable computing

Programming language support for adaptable wearable computin...

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International Symposium on Wearable computers

作者： P.K. McKinley S.M. Sadjadi E.P. Kasten R. Kalaskar Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

software on wearable computers must adapt to dynamic environmental conditions, such as changes in packet loss behavior on wireless communication channels. This paper investigates the use of programming language constructs to realize adaptive behavior. A prototype language, Adaptive Java, was used to construct MetaSocket components, whose composition and behavior can be adapted to changing conditions during execution. MetaSockets were then integrated into Pavilion, a web-based collaboration framework, and experiments were conducted on a mobile computing testbed containing Xybernaut MA-V wearable computer systems. Performance results demonstrate the utility of MetaSockets in reducing file transfer time and enhancing the quality of interactive audio streams.

关键词： computer languages Wearable computers Wireless communication software prototyping Prototypes Java Collaboration Mobile computing System testing Streaming media

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Requirements patterns for embedded systems

Requirements patterns for embedded systems

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IEEE International Conference on Requirements engineering

作者： S. Konrad B.H.C. Cheng Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

In software engineering, design patterns propose solution skeletons for common design problems. The solution skeleton is described in such a way that the design can be used for other projects, where each application tailors the design to specific project constraints. This paper describes research into investigating how a similar approach to reuse can be applied to requirements specifications, which we term requirements patterns. Specifically, the paper explores how object-oriented modeling notations, such as the Unified Modeling Language (UML), can be used to represent common requirements patterns. Structural and behavioral information are captured as part of a requirements pattern. In order to maximise reuse, we focus on requirements patterns for embedded systems. This paper also describes case studies that illustrate how we have applied these general patterns to multiple embedded systems applications from the automotive industry.

关键词： Embedded system software engineering Object oriented modeling Unified modeling language Application software Skeleton Automotive engineering Pattern analysis Collaborative work Laboratories

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Separating introspection and intercession to support metamorphic distributed systems

Separating introspection and intercession to support metamor...

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International Conference on Distributed Computing Systems Workshop

作者： E.P. Kasten P.K. McKinley S.M. Sadjadi R.E.K. Stirewalt Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

Many middleware platforms use computational reflection to support adaptive functionality. Most approaches intertwine the activity of observing behavior (introspection) with the activity of changing behavior (intercession). This paper explores the use of language constructs to separate these parts of reflective functionality. This separation and "packaging" of reflective primitives is intended to facilitate the design of correct and consistent adaptive middleware. A prototype language, called Adaptive Java, is described in which this functionality is realized through extensions to the Java programming language. A case study is described in which "metamorphic" socket components are created from regular socket classes and used to realize adaptive behavior on wireless network connections.

关键词： Middleware Reflection computer networks Distributed computing Wireless networks Prototypes Java Sockets Mobile computing Quality of service

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A novel approach to measuring class cohesion based on dependence analysis

A novel approach to measuring class cohesion based on depend...

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International Conference on software Maintenance (ICSM)

作者： Zhenqiang Chen Yuming Zhou Baowen Xu J. Zhao H. Yang Department of Computer Science and Engineering State Key Laboratory of Software Engineering Southeast University Wuhan University China Department ofComputer Science & Engineering Fukuoka Institute of Technology Japan Department of Computer Science De Montfort University UK

Classes are the basic modules in object-oriented (OO) software, which consist of attributes and methods. Thus, in an OO environment, cohesion mainly concerns how tight the attributes and methods of classes are. This paper discusses the relationships between attributes and attributes, attributes and methods, and methods and methods of a class based on dependence analysis. Then we discuss the properties of these relationships. According to these properties, this paper proposes a novel approach to measuring class cohesion. Our approach overcomes the limitations of previous class cohesion measures, which consider only one or two of the three relationships in a class. We also prove that this measure satisfies the properties that a good measurement should have.

关键词： Laboratories computer science software engineering Guidelines Application software Object oriented programming Encapsulation software measurement Information processing software maintenance

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Dynamic slicing object-oriented programs for debugging

Dynamic slicing object-oriented programs for debugging

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IEEE International Workshop on Source Code Analysis and Manipulation

作者： Baowen Xu Zhenqiang Chen Hongji Yang Department of Computer Science and Engineering South-East University China State Key Laboratory of Software Engineering Wuhan University of China China Department of Computer Science De Montfort University UK

ISBN: (纸本)0769517935

Dynamic program slicing is an effective technique for narrowing the errors to the relevant parts of a program when debugging. Given a slicing criterion, the dynamic slice contains only those statements that actually affect the variables in the slicing criterion. We propose a method to dynamically slice object-oriented (OO) programs based on dependence analysis. It uses the object program dependence graph and other static information to reduce the information to be traced during program execution. It deals with OO features such as inheritance, polymorphism and dynamic bindings. Based on this model, we present methods to slice methods, objects and classes. We also modify the slicing criterion to fit for debugging.

关键词： Laboratories software engineering software debugging software maintenance Object oriented modeling software testing Manipulator dynamics Open source software computer crime Conferences

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ICBMC: an improved cohesion measure for classes

ICBMC: an improved cohesion measure for classes

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International Conference on software Maintenance (ICSM)

作者： Yuming Zhou Baowen Xu Jianjun Zhao Hongji Yang National Key Laboratory of Software Engineering Wuhan University of China Wuhan China Department of computer Science & Engineering South-East University Nanjing China Department of Computer Science & Engineering Fukuoka Institute of Technology Japan Department of Computer Science De Montfort University UK

Class cohesion could be used to evaluate the design quality of classes, to develop test measures for object-oriented software and to restructure poorly designed classes. Among a number of class cohesion measures proposed in the last decade, Chae's measure is based on the structure of the reference graph of a class, which overcomes the limitations of most class cohesion measures. However, it only considers the patterns of interactions among the members of a class partly and hence does not satisfy monotonicity, which may cause the measurement results to be inconsistent with intuition in some cases. This paper first analyzes the limitations of typical cohesion measures for classes in detail, and then proposes an improved cohesion measure ICBMC. Finally, this paper exemplifies the advantages and applications of ICBMC.

关键词： Laboratories computer science software measurement software engineering Information processing software testing software quality Encapsulation Null value Merging

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Using a groupware technology to implement cooperative learning via the Internet - a case study

Using a groupware technology to implement cooperative learni...

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Annual Hawaii International Conference on System sciences (HICSS)

作者： H. Fuks M.A. Gerosa C.J. Pereira de Lucena Software Engineering Laboratory Computer Science Department Catholic University of Rio de JaneiroCatholic Rio de Janeiro Brazil

ISBN: (纸本)0769514359

关键词： Collaborative software Collaborative work Internet Information technology Education Content management Environmental management Navigation Turning Costs

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