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International Conference on computer Supported Cooperative Work in Design

作者： Wei Cui Xiangxu Meng School of Computer Science and Technology Shandong University Jinan China Department of Computer Science and Technology Shandong University of Architecture and Engineering China

ISBN: (纸本)184000025

Today, it has become more difficult for individual designer to fulfill the complicated design work due to the complexity of modern products. Grid provides a supporting environment for collaborative design. Cooperating work is the key to ensure the success of products design. Developing within the grid-based environment that is suitable to the demand of manufacturing design on special area is a challenge to the traditional methods of software development. In this paper, it creates a framework based manufacturing grid that uses peer-to-peer technology. According to this framework, there is a cooperating design environment, in which designers can make designing of machine tools. It also discusses the schedule of cooperating.

关键词： Collaboration Manufacturing Peer to peer computing Resource management computer science Collaborative work Application software Large-scale systems computer architecture Design engineering

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A study of secure communications between mobile objects

A study of secure communications between mobile objects

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IEEE International Conference on Engineering of Complex computer Systems

作者： Liao Zhigang Li Zengzhi Chen Yan Zhan Tao Institute of Computer Architecture & Network Xi''an Jiaotong University Xi'an China Computer science and technology Department Northwest Polytechnical University Xi'an China

JASIAC (Java-based Active-network Secure Inter Active Application Communication) provides a mechanism to solve the security problem for active application communication for active networks. JASIAC can work against "un-authorization access" and "masquerading" quite well and work efficiently with "malicious access " and "direct DoS attack". It stores the variables and methods to be published in a public variable pool and public method pool respectively, so it makes the security manageable and efficient; it also provides multilevel security mechanisms such as timed variable, hiding inner name, parameter by value and read-only parameter to make the security reliable and flexible.

关键词： Mobile communication Java Application software Security Authorization Fabrication Law Legal factors computer architecture computer science

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Uncomputability of Supremal Local Supports in Distributed Diagnosis

Uncomputability of Supremal Local Supports in Distributed Di...

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IEEE Conference on Decision and Control

作者： J.G. Thistle R. Su Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada Architecture and Networking Group (SAN) in Department of Mathematics and Computer Science Eindhovan University of Technology Eindhoven Netherlands

In distributed diagnosis it may be useful to achieve local consistency among local estimates. For that purpose the Computational Procedure for Local Consistency (CPLC) was proposed to achieve the supremal local support, which represents one type of local consistency. It has been shown that if CPLC terminates then the result is in fact the supremal local support. However, in this paper it is shown that, even if all initial estimates are regular languages, the termination of CPLC is undecidable. Moreover, these difficulties are not confined to this specific procedure: it is undecidable whether the supremal local support corresponding to an arbitrary collection of regular initial languages is componentwise empty; consequently, the supremal local support is effectively uncomputable.

关键词： Belief propagation Fault diagnosis Scalability Computational complexity Discrete event systems Formal languages Councils computer architecture Storage area networks Mathematics

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A wavelet based distributed ID model

A wavelet based distributed ID model

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IEEE International Conference on Services Computing (SCC)

作者： Lan Liu Zhitang Li Yong Xu Chenggang Mei Xiaoling Tan Department of Computer Architecture Huangzhong University of Science and Technology Wuhan Hubei China Department of Electronic Information Guangdong Polytechnic Normal University Guangzhou Guangdong China Department of Computer Science South China University of Technology Guangzhou Guangdong China Department of Electronic Engineering Chongqing Three Gorges University Chongqing China

This paper develops a wavelet based distributed ID model approach to analyses network traffic in detail. We adopt wavelet technique to analyze and model ID system to find the attack behavior in network. Our model can post attack characteristic more clearly and, by way of improve the veracity, we compare corresponding network node signals of wavelet decomposition. We simulate attacks and the model can detect attack more precisely than the previous model does.

关键词： Wavelet analysis Frequency synthesizers Telecommunication traffic Traffic control Signal analysis Wavelet coefficients Power system modeling Signal synthesis Prototypes Performance analysis

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Enhancing DNS security using the SSL trust infrastructure

Enhancing DNS security using the SSL trust infrastructure

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Workshop on Object-Oriented Real-Time Dependable Systems (WORDS)

作者： C. Fetzer G. Pfeifer T. Jim Department of Computer Science Institute for System Architecture Dresden University of Technology Dresden Germany AT and T Research Laboratories Florham Park NJ USA

The main functionality of the domain name system (DNS) is to translate symbolic names into IP addresses. Due to the criticality of DNS for the proper functioning of the Internet, many improvements have been proposed for DNS in terms of security and dependability. However, the current secure DNS (DNSSEC) standard has still several problems that need further consideration. For example, online updates and denial of service attacks are not sufficiently addressed. These problems are serious obstacles that might prevent DNSSEC from replacing the traditional DNS. In this paper we discuss several of these technical and economic problems. To address these issues, we propose a simple extension to the existing DNS. It is SSL based and individual domains can decide independently of each other if and when to adopt the extensions. We show how to implement these extensions with the help of a simple proxy DNS server.

关键词： Domain Name System computer crime Web server Data security computer science computer architecture Web and internet services Standards development Large-scale systems Delay

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New algorithm for mining frequent itemsets in sparse database

New algorithm for mining frequent itemsets in sparse databas...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Fei-yue Ye Jian-dong Wang Bi-lin Shao College of Information Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China Department of Computer Science and Technology Jiangsu Teachers College of Technology Changzhou China College of Management Xi''an University of Architecture and Technology Xi'an China

This paper presents novel algorithm for mining frequent itemsets in sparse database, compared with existing algorithm our algorithm has visible advantage. With this algorithm, the scans is less in transaction database, only one time in little and middle transaction database, and not more than two times in large database. In the algorithm, when the transaction database is scanned, the transaction items are saved in unit triplet, and the count of every transaction item is saved in 1-dimension array so that the frequent itemsets are generated in memory. So I/O spending is reduced greatly. The experimental results show that our algorithm is very promising.

关键词： Data mining Itemsets Transaction databases Space technology Association rules Information science computer science technology management computer architecture Electronic mail

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One and two polarizations, membrane creation and objects complexity in P systems

One and two polarizations, membrane creation and objects com...

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International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC)

作者： A. Alhazov R. Freund A. Riscos-Nunez Research Group on Mathematical Linguistics Rovira i Virgili University Tarragona Spain Institute of Mathematics and Computer Science Academy of Sciences of Moldova Moldova Faculty of Informatics University of Technology Vienna Vienna Austria Research Group on Natural Computing Department of Computer Science and Artificial Intelligence University of Sevilla Seville Spain

We improve, by using register machines, some existing universality results for specific models of P systems. P systems with membrane creation are known to generate all recursively enumerable sets of vectors of non-negative integers, even when no region (except the environment) contains more than one object of the same kind. We here show that they generate all recursively enumerable languages, and two membrane labels are sufficient (the same result holds for accepting all recursively enumerable vectors of non-negative integers). Moreover, at most two objects are present inside the system at any time in the generative case. Then we prove that 10 + m symbols are enough to generate any recursively enumerable language over m symbols. P systems with active membranes without polarizations are known to generate all recursively enumerable sets of vectors of non-negative integers. We show that they generate all recursively enumerable languages; four starting membranes with three labels or seven starting membranes with two labels are sufficient. P systems with active membranes and two polarizations are known to generate/accept all recursively enumerable sets of vectors of non-negative integers, only using rules of rewriting and sending objects out. We show that accepting can be done by deterministic systems. Finally, remarks and open questions are presented.

关键词： Polarization Biomembranes computer science Mathematics Informatics Artificial intelligence Registers Bibliographies Scientific computing

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Simulation-based verification method for SoC bus system

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Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of computer-Aided Design and computer Graphics 2005年第10期17卷 2220-2226页

作者： Yue, Huawei Xu, Yongjun Zhang, Zhimin Yi, Bo Department of Physics University of Science and Technology of China Hefei 230026 China Computer Architecture Laboratory Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Information Network Laboratory Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

We propose a simulation-based method in the verification of SoC bus system. By the method, constrained-random vector is used to make simulation first;then a coverage analysis is made in the simulation process until a certain coverage statistics is obtained. Finally, the test vector is manually generated. We use this method to verify a SoC system and get a satisfactory result by reducing the time of simulation effectively.

关键词： Bus system verification Coverage-analysis System on a chip

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Parallel stochastic search for protein secondary structure prediction 5th

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5th International Conference on Parallel Processing and Applied Mathematics, PPAM 2003

作者： Robles, Victor Pérez, María S. Herves, Vanessa Peña, José M. Larrañaga, Pedro Department of Computer Architecture and Technology Technical University of Madrid Madrid Spain Department of Computer Science and Artificial Intelligence University of the Basque Country San Sebastián Spain

ISBN: (纸本)3540219463

Prediction of the secondary structure of a protein from its aminoacid sequence remains an important and difficult task. Up to this moment, three generations of Protein Secondary Structure Algorithms have been defined: The first generation is based on statistical information over single aminoacids, the second generation is based on windows of aminoacids-typically 11-21 aminoacids- and the third generation is based on the usage of evolutionary information. In this paper we propose the usage of naïve Bayes and Interval Estimation Naïve Bayes (IENB) -a new semi naïve Bayes approach- as suitable third generation methods for Protein Secondary Structure Prediction (PSSP). One of the main stages of IENB is based on a heuristic optimization, carried out by estimation of distribution algorithms (EDAs). EDAs are non-deterministic, stochastic and heuristic search strategies that belong to the evolutionary computation approaches. These algorithms under complex problems, like Protein Secondary Structure Prediction, require intensive calculation. This paper also introduces a parallel variant of IENB called PIENB (Parallel Interval Estimation Naïve Bayes). © Springer-Verlag Berlin Heidelberg 2004.

关键词： Evolutionary algorithms

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An adaptive CBR model of call center systems

An adaptive CBR model of call center systems

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8th International Conference on Control, Automation, Robotics and Vision (ICARCV 2004)

作者： Liu, HW Li, L Xuan, YL Jiang, Y Yang, Q Guang Dong University of Technology 510090 China Qing Dao Institute of Architecture and Engineering 206520 China Computer Science Department Hong Kong University of Technology Hong Kong

ISBN: (纸本)0780386531

Adaptation is one of the necessary capabilities of any expert system. In a traditional expert system, the evolving environment is often treated in a static view. And the system accepts the change negatively. Our focus in this paper is to construct an adaptive CBR model which can learn continually through detecting feedbacks from the outside to partially release this. Knowledge base here is improved gradually so to enhance the system's adaptation of solving problems in dynamic environment.

关键词： introspective learning case maintenance and indexing dynamic weights updating

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