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A fast algorithm for finding community structure based on community closeness

A fast algorithm for finding community structure based on co...

The Third International Joint Conference on Computational Science and Optimization(第三届计算科学与优化国际大会 CSO 2010)

作者： Xiufang Jiang Guiquan Liu Zhiting Lin Key Laboratory of Software in Computing and Communication Anhui Province School of Computer Science and Technology University of Science and Technology of China Hefei Anhui 230027 China

ISBN: (纸本)9781424468126;9780769540306

Recently, the characterization of community structures in complex networks has received a considerable amount of attentions. Effective identification of these communities or clusters is a general problem in the field of data mining. In this paper we present a /ast hierarchical agglomerative algorithm based on community closeness (FHACC) algorithm, for detecting community structure which is very efficient and faster than many other competing algorithms. FHACC tends to agglomerate such communities that share the most common vertices into larger ones. Its running time on a sparse network with n vertices and m edges is O(mk + mt), where k denotes the mean vertex degree, and t is the iteration times of community agglomeration in FHACC algorithm. The algorithm was tested on several real-world networks and proved to be high efficient and effective in community finding.

关键词： community structure complex network data mining community closeness

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A Hormone-based Clustering Algorithm in Wireless Sensor Networks

A Hormone-based Clustering Algorithm in Wireless Sensor Netw...

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2010 2nd International Conference on computer Engineering and Technology(2010年第二届计算机工程与技术国际会议 ICCET 2010)

作者： Dayuan Dong Haifeng You Yipeng Zhang Xufa Wang Key Laboratory of Software in Computing and Communication Anhui Province School of Computer Science and Technology University of Science and Technology of China HefeiChina

ISBN: (纸本)9781424463473;9781424463497;9781424463503

Clustering problem is one of the hottest issues in wireless sensor networks (WSNs). The strategy for selection of cluster head has not been sufficiently investigated. In this paper,we propose a hormone-based clustering algorithm (HCA) inspired by the communication mechanism of bioendocrine system to prolong the lifetime of the sensor nodes. Two kinds of hormones,cluster hormone and member hormone,are used in the algorithm. Hormone message can promote a node to become a cluster head or a member node. Comparative experiment shows that the proposed algorithm has effectively prolong the lifetime of WSN compared with LEACH[1] and HEED[2].

关键词： hormone:clustering:wireless sensor networks

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Notice of Retraction: A hormone-modulated emotional model

Notice of Retraction: A hormone-modulated emotional model

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International Conference on computer Engineering and Technology, ICCET

作者： Jianwei Liang Haifeng You Xufa Wang Department of Computer Science and Technology Anhui Key Laboratory of Software in Computing and Communication University of Science and Technology Hefei China

This article has been retracted by the publisher.

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Interactive PBIL with Multiple Probability Vectors for Multimodal Optimization with Implicit Performance Indices

Interactive PBIL with Multiple Probability Vectors for Multi...

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2010 2nd International Conference on computer Engineering and Technology(2010年第二届计算机工程与技术国际会议 ICCET 2010)

作者： Haifeng You Xufa Wang Department of Computer Science and Technology Anhui Key Laboratory of Software in Computing and Communication University of Science and Technology of China Hefei China

ISBN: (纸本)9781424463473

Interactive population-based incremental learning (IPBIL) is an effective method to solve optimization problems with implicit performance indices. It can significantly reduce user fatigue compared with interactive evolutionary computation (IEC). However,each run of IPBIL can only find one solution or some similar solutions. Thus it is not suitable for multimodal optimization problems with implicit performance indices. To solve this problem,we propose an IPBIL with multiple probability vectors (IPBIL-MPV) in this work. The key idea is to utilize multiple probability vectors to catch different search directions and thus find more than one solutions. We perform a subjective experiment in which IPBIL-MPV is applied to a fashion design problem. The experimental results show that IPBIL-MPV can find several distinct solutions in a run. Thus it is an effective method to solve multimodal optimization problems with implicit performance indices.

关键词： population-based incremental learning multimodal optimization:implicit performance indices:fashion design

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An emotional harmony generation system

An emotional harmony generation system

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Congress on Evolutionary Computation

作者： Bin Xu Shangfei Wang Xian Li Key Laboratory of Computing Software of Anhui Province School of Computer Science and Technology University of Science and Technology China Department of Automation University of Science and Technology China

This paper proposes an emotional harmony composition system using a series of predefined rules and interactive genetic algorithm. Two kinds of rules are defined: One is harmony composition rules used for composing harmony and the other is harmony emotion rules which may indicate the mapping between harmonic elements and a specific emotion of either happiness or sadness. Interactive genetic algorithm is applied to incorporate users' subjective perception in the generated harmony. Both subjective and objective experiments are conducted to prove the effectiveness of our approach.

关键词： User interfaces Humans Harmonic analysis Converters Music Genetics Artificial intelligence

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Research on buffer overflow test based on invariant

Research on buffer overflow test based on invariant

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IEEE 9th International Conference on computer and Information Technology, CIT 2009

作者： Zeng, Fanping Chen, Minghui Yin, Kaitao Wang, Xufa Department of Computer University of Science and Technology of China Anhui Province Key Lab. of Software in Computer and Communication Hefei Anhui China Department of Computer University of Science and Technology of China Hefei Anhui China

ISBN: (纸本)9780769538365

Buffer overflow (BOF) is one of the major vulnerabilities that lead to non-secure software. Testing an implementation for BOF vulnerabilities is challenging as the underlying reasons of buffer overflow vary widely. This paper presents a novel method for BOF test for ANSI C language, which uses program instrumentation and mutation test technology to test the BOF vulnerabilities, on the basis of analyzing the invariants for BOF vulnerabilities. The implementation shows that it can check the attack of BOF vulnerabilities adequately and accurately, in the circumstances of no large losses in performance. © 2009 IEEE.

关键词： Testing

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Cooperative spectrum sensing with feedback

Cooperative spectrum sensing with feedback

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5th International Conference on Wireless communications, Networking and Mobile Computing, WiCOM 2009

作者： Ping, Zhu Jinglong, Li Xufa, Wang Anhui Province Key Laboratory of Software in Computing and Communication School of Computer Science and Technology University of Science and Technology of China Hefei Anhui China

ISBN: (纸本)9781424436934

One of the main objective of spectrum sensing is to detect spectrum opportunity quickly and accurately. Both of the two aspects can be improved by hardware upgrading and software optimization. In this paper, we concentrate on sensing accuracy, which, differs from previous solutions, will be enhanced by modification of network topology. We expand the traditional parallel fusion network (PFN) to parallel feedback fusion network (PFFN), in which local cognitive sensor makes its local decision based on previous global decision and its recent observation. We then derived optimal decision rules for PFFN. Moreover, based on PFFN, sensing history of local cognitive sensor is introduced and studied. Theoretical analysis and experimental results show that PFFN outperforms the PFN in smaller system error probability under the same SNR. We also proved that PFFN and PFFN with sensing history (PFFNSH) emphasize on different aspects when certain condition holds in real world applications. Finally, a general PFFN framework is proposed and discussed. ©2009 IEEE.

关键词： Feedback

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Research on method of object-oriented test cases generation based on UML and LTS

Research on method of object-oriented test cases generation ...

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1st International Conference on Information Science and Engineering, ICISE2009

作者： Zeng, Fanping Chen, Zhide Cao, Qing Mao, Liangliang Department of Computer University of Science and Technology of China Hefei Anhui 230026 China Anhui Province Key Lab. of Software in Computer and Communication Hefei Anhui 230026 China

ISBN: (纸本)9780769538877

We present a novel method of Object-Oriented test case generation based on UML state diagrams and Label Transition System (LTS). The procedure is based on model-based testing techniques with test cases generated from UML state diagrams translated into LTS. UML state diagram can be a model of modeling software system. LTS model is an internal model to precisely represent the state transition. The examples and analysis show that our method is effective. ©2009 IEEE.

关键词： Model checking

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Evolutionary Games on Weighted Newman-Watts Small-World Networks

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Chinese Physics Letters 2009年第5期26卷 255-258页

作者：杜文博曹先彬赵琳周宏 Department of Computer Science and Technology University of Science and Technology of China Hefei 230026 Anhui Province Key Laboratory of Software in Computing and Communication University of Science and Technology of China Hefei 230026 School of Life Sciences University of Science and Technology of China Hefei 230026

We investigate the evolutionary prisoner＇s dilemma game （PDG） on weighted Newman-Watts （NW） networks. In weighted NW networks, the link weight ωij is assigned to the link between the nodes i and j as： ωij = （ki · kj）^β, where ki（kj） is the degree of node i（j） and β represents the strength of the correlations. Obviously, the link weight can be tuned by only one parameter β. We focus on the cooperative behavior and wealth distribution in the system. Simulation results show that the cooperator frequency is promoted by a large range of β and there is a minimal cooperation frequency around β = -1. Moreover, we also employ the Gini coefficient to study the wealth distribution in the population. Numerical results show that the Gini coefficient reaches its minimum when β≈ -1. Our work may be helpful in understanding the emergence of cooperation and unequal wealth distribution in society.

关键词： PRISONER'S dilemma game COOPERATIVENESS INCOME distribution SIMULATION methods & models GINI coefficient NUMERICAL analysis

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Dynamical Trust Construction Schema with Fuzzy Decision in P2P Systems

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电子学报(英文版) 2009年第3期18卷 417-421页

作者： WANG Yang WANG Ruchuan HAN Zhijie College of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Computer Anhui Normal University Wuhu 241000 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

The security problem for Peer-to-peer (P2P) systems has been gradually recognized as an important topic of P2P applications. Among existing solution for P2P security, how to establish trust relationship among peers is a key problem in demand. This paper proposes a novel dynamical trust construction schema based on fuzzy decision and Extended automated trust negotiation (EATN). The presented approach adopts fuzzy trust graph to describe the trust information in the P2P systems. Trust relationship among peers can be constructed by the combination of the fuzzy trust graph, fuzzy path search algorithm and EATN. The relevant application case indicates the schema is feasible. The simulations also show that the presented schema can improve the interactive success ratio by enhancing the trust relationship in the P2P systems.

关键词： P2P系统模糊决策建设动态信任协商信托安全解决方案信任关系认可制度

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