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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： A. Idri T.M. Khoshgoftaar A. Abran Empirical Software Engineering Laboratory Department of Computer Science and Engineering Florida Atlantic University Boca Raton FL USA

software development effort estimation with the aid of neural networks has generally been viewed with skepticism by a majority of the software cost estimation community. Although, neural networks have shown their strengths in solving complex problems, their shortcoming of being 'black boxes' models has prevented them from being accepted as a common practice for cost estimation. In this paper, we study the interpretation of cost estimation models based on a backpropagation three layer perceptron network. Our proposed idea comprises mainly of the use of a method that maps this neural network to a fuzzy rule based system. Consequently, if the obtained fuzzy rules are easily interpreted, the neural network will also be easy to interpret. Our case study is based on the COCOMO'81 dataset.

关键词： Neural networks Intelligent networks Costs Artificial neural networks Programming Fuzzy neural networks software engineering Predictive models Biological system modeling Backpropagation algorithms

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An empirical study of the impact of count models predictions on module-order models

An empirical study of the impact of count models predictions...

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International Symposium on software Metrics

作者： T.M. Khoshgoftaar E. Geleyn K. Gao Department of Computer Science and Engineering Empirical Software Engineering Laboratory Atlantic University Boca Raton FL USA Florida Atlantic University Boca Raton FL USA

software quality prediction models are used to achieve high software reliability. A module-order model (MOM) uses an underlying quantitative prediction model to predict this rank-order. This paper compares performances of module-order models of two different count models which are used as the underlying prediction models. They are the Poisson regression model and the zero-inflated Poisson regression model. It is demonstrated that improving a count model for prediction does not ensure a better MOM performance. A case study of a full-scale industrial software system is used to compare performances of module-order models of the two count models. It was observed that improving prediction of the Poisson count model by using zero-inflated Poisson regression did not yield module-order models with better performance. Thus, it was concluded that the degree of prediction accuracy of the underlying model did not influence the results of the subsequent module-order model. Module-order modeling is proven to be a robust and effective method even though both underlying prediction may sometimes lack acceptable prediction accuracy.

关键词： Predictive models Q factor software quality Message-oriented middleware computer industry software systems Accuracy Fuzzy logic software metrics Economic forecasting

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Formal specification of a real-time lift dispatching system

Formal specification of a real-time lift dispatching system

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Canadian Conference on Electrical and computer engineering (CCECE)

作者： Yingxu Wang F.C. Ngolah Department of Electrical & Computer Engineering Theoretical and Empirical Software Engineering Research Center University of Calgary Calgary AB Canada Department of Computer Science University of Buea Cameroon

This paper describes the formal specification of a lift dispatching system (LDS) by the real-time process algebra (RTPA). It is recognized that the specification of a real-time system is a hard problem because the specification has to address the 3D behaviors of software where timing, logic and dynamic memory allocation functionalities are very critical. The real-time process algebra (RTPA) is a descriptive formal notation system designed for real-time software system specification, and is able to address the 3D properties of real-time software systems. The aim of this paper is to demonstrate the use of RTPA in describing a lift dispatching system (LDS). The case study on LDS illustrates the applications of RTPA in real-time system specification and refinement. This case study on the realtime LDS system shows the features and advantages of the algebra-based approach to real-time system specification and refinement in RTPA.

关键词： Formal specifications Real time systems Dispatching Algebra Timing Control systems Hardware software systems computer interfaces Drives

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AN INCREMENTAL UPDATING ALGORITHM FOR MINING ASSOCIATION RULES

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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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