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作者： Ceng, Xian-Yi Li, Shu-Qin Xia, De-Shen Department of Computer Science NanJing University of Science and Technology 210094 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Computer Science and Communication Engineering Institute Jiangsu University 212013 China

A good organization model of multiple mobile robot should be able to improve the efficiency of the system, reduce the complication of robot interactions, and detract the difficulty of computation. From the sociology aspect of topology, structure and organization, this paper studies the multiple mobile robot organization formation and running mechanism in the dynamic, complicated and unknown environment. It presents and describes in detail a Hierarchical-Web Recursive Organization Model (HWROM) and forming algorithm. It defines the robot society leader;robotic team leader and individual robot as the same structure by the united framework and describes the organization model by the recursive structure. The model uses task-oriented and top-down method to dynamically build and maintain structures and organization. It uses market-based techniques to assign task, form teams and allocate resources in dynamic environment. The model holds several characteristics of self-organization, dynamic, conciseness, commonness and robustness.

关键词： Mobile robots

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A CBR engine adapting to IDS

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International Conference on Computational Intelligence and Security, CIS 2005

作者： Li, Lingjuan Tang, Wenyu Wang, Ruchuan Nanjing University of Posts and Telecomm Dept. of Computer Science and Technology Nanjing 210003 China Nanjing University State Key Laboratory for Novel Software Technology Nanjing 210093 China

ISBN: (纸本)3540308199

CBR is one of the most important artificial intelligence methods. In this paper, it is introduced to detect the variation of known attacks and to reduce the false negative rate in rule based IDS. After briefly describes the basic process of CBR and the methods of describing case and constructing case base by rules of IDS, this paper focuses on the CBR engine. A new CBR engine adapting to IDS is designed because the common CBR engines cannot deal with the specialties of intrusion cases in IDS. The structure of the new engine is described by class graph, and the core class as well as the similarity algorithm adopted by it is analyzed. At last, the results of testing the new engine on Snort are shown, and the validity of the engine is substantiated. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Artificial intelligence

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An energy-efficient unequal clustering mechanism for wireless sensor networks

An energy-efficient unequal clustering mechanism for wireles...

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2nd IEEE International Conference on Mobile Ad-hoc and Sensor Systems, MASS 2005

作者： Li, Chengfa Ye, Mao Chen, Guihai Wu, Jie State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Department of Computer Science and Engineering Florida Atlantic University Boca Raton FL 33431

ISBN: (纸本)0780394666

Clustering provides an effective way for prolonging the lifetime of a wireless sensor network. Current clustering algorithms usually utilize two techniques, selecting cluster heads with more residual energy and rotating cluster heads periodically, to distribute the energy consumption among nodes in each cluster and extend the network lifetime. However, they rarely consider the hot spots problem in multihop wireless sensor networks. When cluster heads cooperate with each other to forward their data to the base station, the cluster heads closer to the base station are burdened with heavy relay traffic and tend to die early, leaving areas of the network uncovered and causing network partition. To address the problem, we propose an Energy-Efficient Unequal Clustering (EEUC) mechanism for periodical data gathering in wireless sensor networks. It partitions the nodes into clusters of unequal size, and clusters closer to the base station have smaller sizes than those farther away from the base station. Thus cluster heads closer to the base station can preserve some energy for the inter-cluster data forwarding. We also propose an energy-aware multihop routing protocol for the inter-cluster communication. Simulation results show that our unequal clustering mechanism balances the energy consumption well among all sensor nodes and achieves an obvious improvement on the network lifetime. © 2005 IEEE.

关键词： Wireless telecommunication systems

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A hybrid workflow paradigm for integrating self-managing domain-specific applications

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4th International Conference on Grid and Cooperative Computing - GCC 2005

作者： Dou, Wanchun Chueng, S.C. Chen, Guihai Wang, J. Cai, S.J. State Key Laboratory for Novel Software Technology Department of Computer Science and Technology Nanjing University Nanjing 210093 China Department of Computer Science Hong Kong University of Science and Technology Hong Kong Hong Kong Department of Civil and Environmental Engineering Stanford University Stanford CA 94305 United States

ISBN: (纸本)3540305106

A hybrid workflow system could be treated as a domain-across infrastructure by incorporating different workflow systems and WfMSs engaged in the complex business processing. For enacting a hybrid workflow system, the self-managing discipline employed in autonomic computing is imposed on domain-specific applications. By classifying the data issues engaged in a domain-specific application into process data and application data and for enhancing the incorporation among the self-managing domain-specific applications from global view of point, the foundation of self-governing management is discussed based on behavior logic and control logic analysis. To conclude, a case study is presented for illustrating the scenarios and the characteristics of hybrid workflow paradigm are summarized. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Administrative data processing

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Learning classifier system ensemble for data mining 05

Learning classifier system ensemble for data mining

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GECCO 2005 - Genetic and Evolutionary Computation Conference

作者： Gao, Yang Huang, Joshua Zhexue Rong, Hongqiang Gu, Daqian State Key Laboratory for Novel Software Technology Nanjing University Nanjing China E-business Technology Institute The University of Hong Kong Hong Kong Department of Computer Science The University of Hong Kong Hong Kong

ISBN: (纸本)1595930108

This paper proposes LCSE, a learning classifier system ensemble, which is an extension of the classical learning classifier system(LCS). The classical LCS includes two major modules, a genetic algorithm module used to facilitate rule discovery, and a reinforcement learning module used to adjust the strength of the corresponding rules while it receives the rewards from the environment. In LCSE we build a two-level ensemble architecture to enhance the generalization of LCS. In the first-level, new instances are first bootstrapped and sent to several LCSs for classification. Then, in the second-level, a plurality-vote method is used to combine the classification results of individual LCSs into a final decision. Experiments on some benchmark data sets from the UCI repository have shown that LCSE has better generalization ability than the single LCS and other supervised learning methods. © 2005 ACM.

关键词： Data mining

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Research of Adaptation of Infrastructures for WSRF in Grid Computing

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The Journal of China Universities of Posts and Telecommunications 2005年第4期12卷 1-5页

作者： YANG Qing WANG Ru-chuant WANG Hai-yan Department of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 P.R. China

One of the challenges that come from the development of Grid Computing applications is to predigest complicated process of compiling, deploying on the infrastructures and toolkits such as Globus Toolkit. As we explain in this article, we think it is essential to find the solution for rapid Grid Computing applications development. GBuilder is just such a tool we worked out for rapid develop on extant Grid Computing infrastructure platforms. By using GBuilder, applications should be able to react dynamically to different infrastructures and toolkits. Since WS-Resource Framework （WSRF） specifications provide technique standard to developers to declare and implement the association between Web service and one or more stateful resources, we aim at making infrastructures provide WS-Resource according these specifications automatically by adding a middleuaare. This paper focuses on the adapting mechanisms that are provided as the lowermost component of GBuilder. First we study the adapting model for Globus Toolkit in patterns of combination dynamic and static. Then it describes how to apply the dynam-static adaptation flexibly to adjust different infrastructures to provide WS-Resource based on WSRF. At last, it comes along the conclusion and we give out our future works.

关键词： grid computing adaptation WSRF globus toolkit

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Comparative research on network fault management based on SNMP and mobile agent

Nanjing Youdian Xueyuan Xuebao/Journal of Nanjing Institute ...

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Nanjing Youdian Xueyuan Xuebao/Journal of Nanjing Institute of Posts and Telecommunications 2005年第4期25卷 74-79页

作者： Xu, Xi-Chun Wang, Ru-Chuan Department of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

In order to enhance flexibility, intelligence and efficiency of Fault Management and overcome disadvantages in traditional centralized Network Fault Management, this paper describes the network fault management frameworks based on SNMP (Simple Network Management Protocol) and Mobile Agent respectively. Then, detailed comparison between both schemes has been made in terms of theory and practice. The result indicates that Mobile Agent based Network Fault Management System can provide an efficient, real-time and accurate management on the managed network taking advantage of the characteristics of mobility, intelligence and flexibility of mobile agent in contrast to the former. Especially, it shows great advantages in managing complex networks.

关键词： Fault management Mobile agent Network fault detection Network management Simple network management protocol

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A search eigine of internet information based on agent

A search eigine of internet information based on agent

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International Conference on Machine Learning and Cybernetics, ICMLC 2005

作者： Cheng, Xian-Y.I. Yan, L.I. Liu, Y.I.- Song Lin, Qing Bi, Jian-Liang Xia, D.E.-Shen State Key Laboratory for Novel Software Technology Nanjing University Nianjing. 2 10093 China Computer Science and Communication Engineering Institute Jiangsu University Zhenjiang212013 China Department of Computer Science NanJing University of ScienceandTechnology Nianjing 219004 China

In this paper, the frame of AgentSeek, which is a search engine based on Agent are introduced. It can find user interesting the user does want, thereby rates of recall and accuracy have been improved largely. © 2... 详细信息

ISBN: (纸本)078039092X

关键词： Information retrieval

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Performance evaluation of allgather algorithms on terascale Linux cluster with Fast Ethernet

Performance evaluation of allgather algorithms on terascale ...

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8th International Conference on High-Performance Computing in Asia-Pacific Region

作者： Chen, Jing Zhang, Linbo Zhang, Yunquan Yuan, Wei Department of Computer Science University of Science and Technology of China China Lab. of Parallel Computing Institute of Software CAS China State Key Laboratory of Computer Science China Academy of Mathematics and Systems Sciences CAS China

ISBN: (纸本)0769524869

We report our work on evaluating performance of several MPI Allgather algorithms on Fast Ethernet. These algorithms are ring, recursive doubling, Bruck, and neighbor exchange. The first three algorithms are widely used today. The neighbor exchange algorithm which was recently proposed by the authors incorporates pair-wise exchange, and is expected to perform better with certain configurations, mainly when using TCP/IP over Ethernet. We tested the four algorithms on terascale Linux clusters DeepComp 6800 and DAWNING 4000A using TCP/IP over Fast Ethernet. Results show that our neighbor exchange algorithm performs the best for long messages, the ring algorithm performs the best for medium-size messages and the recursive doubling algorithm performs the best for short messages.

关键词： computer networks

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Research of pivotal policy in grid security model

Nanjing Youdian Xueyuan Xuebao/Journal of Nanjing Institute ...

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Nanjing Youdian Xueyuan Xuebao/Journal of Nanjing Institute of Posts and Telecommunications 2005年第2期25卷 71-75页

作者： Chen, Hong-Wei Wang, Ru-Chuan Department of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

A platform-independent grid security model and several model-based security policies such as authentication and authorization are presented in this paper. The security policies include the public key infrastructure (PKI) management model based on bridge certificate authority (CA), the authentication policy based on virtual organization and the access control policy such as delegation in grid environment. These policies can facilitate authentication among virtual organizations based on different PKI management policies, simplify security authentication in grid environment, and manage grid resources dynamically and effectively.

关键词： Grid security Security model Security policy Virtual organization

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