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The Fourth International Conference on Parallel and Distributed Computing, Applications and Technologies

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

Based on the analysis of characteristics of current attacks,a collaborative intrusion detection model using coordination agent is *** this paper defines 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 *** 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 *** 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 *** the same time,an example shows the feasibility and validity of the model and the algorithm.

关键词： Intrusion Intrusion detection Coordination agent Collaborative detection

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Collaborative intrusion detection based on coordination agent

Collaborative intrusion detection based on coordination agen...

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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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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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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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Ackermann Functions --A Survey and Empirical Study

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计算机科学 2002年第z1期29卷 103-105页

作者： Li Yunpeng State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing 210093 China Institute of Command PLA University of Science and Technology Nanjing 210007 China

Ackermann functions are examples of nonprimitive recursive function which grow so fast with respect to their arguments. In this paper, we present Ackermann functions in detail and introduce its influence on theoretica... 详细信息

关键词： Ackermann functions Recursive function Operators Algorithm

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Sketch-based user interface for inputting graphic objects on small screen devices 4

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4th International Workshop on Graphics Recognition, GREC 2001

作者： Wenyin, Liu Jin, Xiangyu Sun, Zhengxing Department of Computer Science City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR Hong Kong State Key Laboratory for Novel Software Technology Nanjing University Nanjing210093 China

ISBN: (纸本)3540440666

For small screen devices, such as PDAs, which totally depend on a pen-based user interface, traditional menu-selection/button-clicking based user interface becomes inconvenient for graphics inputting. In this paper, a novel sketch-based graphics inputting user interface is presented. By sketching a few constituent primitive shapes of the userintended graphic object, the candidate graphic objects in the shape database are guessed and displayed in a ranked list according to their partial structural similarity to what the user has drawn. The user can then choose the right one from the list and replace the sketchy strokes with the exact graphic object with proper parameters, such as position, size and angle. This user interface is natural for graphics input and is especially suitable for schematic design. © Springer-Verlag Berlin Heidelberg 2002.

关键词： User interfaces

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SVM-based incremental active learning for user adaptation for online graphics recognition system

SVM-based incremental active learning for user adaptation fo...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Bin-Bin Peng Zheng-Xing Sun Xiao-Gan Xu State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing China

User adaptation is critical in the future design of human-computer interaction systems. Many pattern recognition problems, such as handwriting/sketching recognition and speech recognition, are user dependent since different users' handwritings, drawing styles, and accents are different. Hence, the classifiers for solving these problems should provide the functionality of user adaptation so as to let all users experience better recognition results. However, the user adaptation functionality requires the classifiers have the incremental learning ability in order to learn fast. In this paper, an SVM-based incremental active learning algorithm is presented to solve this problem. By utilizing the support vectors and only a small portion of the nonsupport vectors as well, in addition to the new interrogative samples, in the iterative training and reclassification cycle, both the training time and the storage space are saved with only very little classification precision being lost. Theoretical analysis, experimentation, evaluation, and real application samples in our online graphics recognition system are presented to show the effectiveness of this algorithm.

关键词： Pattern recognition Machine learning computer graphics Speech recognition Iterative algorithms Statistics Support vector machines Support vector machine classification Sun computer science

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