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IEEE International Conference on Parallel and Distributed Computing, Applications and Technologies (PDCAT)

作者： Ran Zhang Depei Qian Heng Chen Weiguo Wu Department of Computer Science and Technology Xi'an Jiaotong University Xi'an China State Key Laboratory on Software Development Environment Beihang University Beijing China Department of Computer Science and Technology Xi'an Jiaotong University Xi'an

Based on the analysis of characteristics of current attacks, a collaborative intrusion detection model using coordination agent is proposed. Then we define the inner structure of intrusion detection agents, introduces its collaboration principle and security solution. On the basis of the above research, an effective algorithm of collaborative detection is put forward. In this model, the complicated collaboration task is finished by some separate coordination agents, which are responsible for synthetically analyzing the detection task that the lower agents are unable to finish and are able to assign the task to the lower associated agents. It not only simplifies the building of detection agents and improves the extent and efficiency of collaboration, thus overcoming the shortcomings of direct collaboration among agents in traditional methods, but also enhances the capability of detecting complex attacks. At the same time, an example shows the feasibility and validity of the model and the algorithm.

关键词： Collaboration Intrusion detection computer hacking Data security Floods computer networks Radio access networks computer science Programming Availability

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Seamless provisioning of service in the ubiquitous computing environment

Seamless provisioning of service in the ubiquitous computing...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： En-Yi Chen De-Gan Zhang Yuan-Chun Shi Guang-You Xu The State Key Laboratory of Intelligence System and Technology Department of Computer Science and Technology Tsinghua University Beijing China

ISBN: (纸本)0780378652

In the ubiquitous computing environment (UCE), how to seamlessly provision the service or application to its occupant or its mobile user is an interesting research topic. This paper introduces our two UCEs called smart classroom (SCR) and intelligent meeting room (IMR) respectively. When a teacher gives his lesson in the SCR, different services will automatically be provisioned to him according to captured context information. When the users with various kinds of portable devices, such as PDA, mobile phone or laptop, attend a meeting in IMR, they can easily organize a meeting and unobtrusively access the services provided by IMR, for example, they could give presentation by "projector service". The paper also describes the software infrastructure of SCR and IMR - smart platform, a multi agents (MAs) system.

关键词： Ubiquitous computing Pervasive computing Thyristors Portable computers Application software Mobile computing Embedded software computer networks Space technology Education

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Design of a parser for real-time process algebra

Design of a parser for real-time process algebra

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Canadian Conference on Electrical and computer Engineering (CCECE)

作者： Jianhua Zhao Yingxu Wang State Key Laboratory of Novel Software Technology Department of Computer Science and Technology University of Calgary Nanjing University Jiangsu China Theoretical and Empirical Software Engineering Research Centre Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

ISBN: (纸本)0780377818

The real-time process algebra (RTFA) is a set of new mathematical notations for formally describing software system architectures, and static and dynamic behaviors. To bring RTPA into industrial software development practice, tools are needed for analyzing and visualizing RTPA specifications. The first step to develop the supporting tools is to build a grammar parser for recognizing the RTPA notation system. In this paper, a parser of RTPA is described. The parser takes a textual RTPA specification as input, and generates an abstract syntax tree (AST) as its output. The generated AST represents RTPA tokens and lexical information in a structured format, which provides a foundation for further semantic analysis, code generation, visualization, and validation.

关键词： Algebra Real time systems computer architecture Java software engineering Visualization computer science Drives software systems computer industry

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Online recommendation based on customer shopping model in e-commerce 03

Online recommendation based on customer shopping model in e-...

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Junzhong Ji Zhiqiang Sha Chunnian Liu Ning Zhong College of Computer Science and Technology Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology Beijing University of Technology Beijing China Department of Information Engineering Maebashi Institute of Technology Maebashi Japan

ISBN: (纸本)0769519326

As e-commerce developing rapidly, it is becoming a research focus about how to capture or find customer's behavior patterns and realize commerce intelligence by use of Web mining technology. Recommendation system in electronic commerce is one of the successful applications that are based on such mechanism. We present a new framework in recommendation system by finding customer model from business data. This framework formalizes the recommending process as knowledge representation of the customer shopping information and uncertainty knowledge inference process. In our approach, we firstly build a customer model based on Bayesian network by learning from customer shopping history data, then we present a recommendation algorithm based on probability inference in combination with the last shopping action of the customer, which can effectively and in real time generate a recommendation set of commodity.

关键词： Data mining Business Knowledge representation Collaboration Web mining Uncertainty Bayesian methods History Inference algorithms Filtering

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A new multiobjective evolutionary algorithm: OMOEA

A new multiobjective evolutionary algorithm: OMOEA

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Congress on Evolutionary Computation

作者： San You Zeng LiXin Ding Yuping Chen LiShan Kang Department of Computer Science China University of Geoscience Wuhan Hubei China Department of Computer Science Zhuzhou Institute of Technology Zhuzhou Hunan China State Key Laboratory of Software Engineering Wuhan University of China Wuhan Hubei China

ISBN: (纸本)0780378040

A new algorithm is proposed to solve constrained multiobjective problems. The constraints of the MOPs are taken account of in determining Pareto dominance. As a result, the feasibility of solutions is not an issue. At the same time, it takes advantage of both the orthogonal design method to search evenly, and the statistical optimal method to speed up the computation. The output of the technique is a large set of solutions with high precision and even distribution. Notably, for an engineering problem WATER, it finds the Pareto-optimal set, which was previously unknown.

关键词： Evolutionary computation computer science Geology Design methodology Design optimization Genetic algorithms Algorithm design and analysis Laboratories software engineering Sorting

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Attribute reduction of rough sets in mining market value functions 03

Attribute reduction of rough sets in mining market value fun...

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IEEE WIC ACM International Conference on Web Intelligence (WI)

作者： Jiajin Huang Chunnian Liu Chuangxin Ou Y.Y. Yao N. Zhong Mutimedia and Intelligent Software Technology Beijing Municipal Key Laboratory Beijing University of Technology Beijing China Department of Computer Science University of Regina Regina SAS Canada Department of Information Engineering Macbashi Institute of Technology Maebashi Japan

ISBN: (纸本)9780769519326

The linear model of market value functions is a new method for direct marketing. Just like other methods in direct marketing, attribute reduction is very important to deal with large databases. We apply the algorithm of attribute reduction, which is based on the combination of rough set theory with the boosting algorithm, to the linear model of market value functions. Experimental results compared with the ELSA/ANN model show that the proposed algorithms can be used effectively in the linear model of market value functions.

关键词： Rough sets Set theory Databases Entropy Laboratories computer science Boosting Internet Data mining Predictive models

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Website evolution based on statistic data

Website evolution based on statistic data

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IEEE Workshop on Future Trends of Distributed Computing Systems

作者： Lei Xu Baowen Xu Zbenqiang Chen Huowang Chen Department of Computer Science & Engineering Southeast University Nanjing China State Key Laboratory of Software Engineering Wuhan University Wuhan China School of Computer Science National University of Defense Technology Changsha China Southeast University Nanjing Jiangsu CN Dept. of Comput. Sci. & Eng. Southeast Univ. Nanjing China

ISBN: (纸本)0769519105

Maintenance and evolution are critical for website since the requirements often change, the developing cycle is short, while the life cycle is long. In order to make progress in this area, we focus on the users' responses and attitudes. So we begin our work at the log files on the side of website server, gathering the users' visiting information and the server's responses. Thus we obtain our weighted structure model. Then, we analyze and discuss such information to identify the key pages, the predominate pages and the users' visiting patterns. And we can improve the testing efficiency based on these knowledge. All these will help to improve the structure of the site, fulfill the functionality of the site, and enhance users' visiting efficiency.

关键词： Statistics computer science Laboratories software engineering File servers Information analysis Data mining History Uniform resource locators Statistical analysis

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Greylevel Difference Classification Algorithm in Fractal Image Compression

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Journal of computer science & technology 2002年第2期17卷 236-240页

作者：陈毅松卢坚孙正兴张福炎 State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing 210093 P.R. China

This paper proposes the notion of a greylevel difference classification algorithm in fractal image compression. Then an example of the greylevel difference classification algo rithm is given as an improvement of the quadrant greylevel and variance classification in the quadtree-based encoding algorithm. The algorithm incorporates the frequency feature in spatial analysis using the notion of average quadrant greylevel difference, leading to an enhancement in terms of encoding time, PSNR value and compression ratio.

关键词： image coding fractal classification algorithm greylevel differenceclassifica- tion

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Adaptive efficient video transmission over the Internet based on congestion control and RS coding

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science in China(Series F) 2002年第2期45卷 121-129页

作者：黄伟红张福炎孙正兴 1. State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University 210093 Nanjing China

An approach based on adaptive congestion control and adaptive error recovery with RS (Reed-Solomon) coding method is presented for efficient video transmission over the Internet. Featured by weighted moving average rate control and TCP-friendliness, AVSP, a novel adaptive video streaming protocol, is designed with adjustable rate control parameters so as to respond quickly to the QoS status fluctuation during video transmission over the Internet. Combined with congestion control policy, an adaptive RS coding error recovery scheme with variable parameters is presented to enhance the robustness of MPEG video transmission over the Internet with restriction to the total system bandwidth .

关键词： video transmission congestion control error recovery Reed-Solomon coding.

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Checking Temporal Duration Properties of Timed Automata

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Journal of computer science & technology 2002年第6期17卷 689-698页

作者：李勇 Dang Van Hung State Key Laboratory of Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing 210093 P.R. China International Institute for Software Technology The United Nations University P.O. Box 3058 Macao SAR P.R. China

In this paper, the problem of checking a timed automaton for a Duration Cal-culus formula of the form Temporal Duration Property is addressed. It is shown that TemporalDuration Properties are in the class of discretisable real-time properties of Timed Automata,and an algorithm is given to solve the problem based on linear programming techniques andthe depth-first search method in the integral region graph of the automaton. The complexityof the algorithm is in the same class as that of the solution of the reachability problem of timedautomata.

关键词： model checking duration calculus timed automata

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