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IT Professional 2009年第4期11卷 10-11页

作者： Chou, Wes Chang, J. Morris Christensen, Ken Cisco Systems' Application Delivery Buisness Unit Department of Electrical and Computer Engineering Iowa State University Department of Computer Science and Engineering University of South Florida

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Fuzzy description logic F-SHOIQ(G) supporting representation of fuzzy data types

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Jisuanji Xuebao/Chinese Journal of computers 2009年第8期32卷 1511-1524页

作者： Wang, Hai-Long Ma, Zong-Min Yan, Li Cheng, Jing-Wei Institute of Computer Application Technology College of Information Science and Engineering Northeastern University Shenyang 110004 China Institute of Software Engineering School of Software Northeastern University Shenyang 110004 China

The shortcomings of existing description logics in the representation of fuzzy knowledge and data types are analyzed and a kind of new fuzzy description logic named F-SHOIQ(G) is proposed in the paper. F-SHOIQ(G) can support not only the representation of fuzzy knowledge, but also the representation of fuzzy data information with customized fuzzy data types and customized fuzzy data type predicates. Firstly, the concept of fuzzy data type group and a general formalism of the representation of fuzzy data types are introduced. Then, based on the fuzzy data type group, the syntax, semantics of F-SHOIQ(G) and the components of its corresponding knowledge base are defined. Furthermore, the satisfiability reasoning algorithm of F-SHOIQ(G)-concept based on the fuzzy Tableaux is presented. Secondly, the traditional reasoning architecture in which the reasoning of Tableaux expansion rules and data type can be divided is adopted for the reasoning of F-SHOIQ(G). The corresponding fuzzy data type reasoner is designed. Finally, the decidability of the satisfiability reasoning problem of F-SHOIQ(G)-concept is proved. The representation and reasoning capabilities of F-SHOIQ(G) go beyond the fuzzy description logic FSHOIQ in the representation of data information. F-SHOIQ(G) lays a theoretical foundation for the representation and reasoning of fuzzy data information in the Semantic Web.

关键词： Data description

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A QoS-based robust multipath routing protocol for mobile ad hoc networks

A QoS-based robust multipath routing protocol for mobile ad ...

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Asian Himalayas International Conference on Internet, AH-ICI

作者： S. Venkatasubramanian N.P. Gopalan Department of Computer Science & Engineering Saranathan College of Engineering Tiruchirappalli India Department of Computer Application National Institute of Technology Tiruchirappalli India

In mobile ad hoc networks, the unstable transport layer and inhibited amount of traffic being carried out by the network is owing to the high packet loss rates and frequent topological changes. It is essential that least available bandwidth and end-to-end latency along with congestion around a link are integrated in a QoS-based routing metric for MANETs. In this paper we develop a QoS-based, robust multipath routing (QRMR) protocol for mobile ad hoc networks to allot weights to individual links, depending on the metrics link quality, channel quality and end-to-end delay. The individual link weights are combined into a routing metric to validate the load balancing and interference between links using the same channel. Consequently, the traffic is balanced and the network capacity is improved as the weight value assists the routing protocol to evade routing traffic through congested area. Subsequently, the selection of the proportion of traffic to be routed to each neighbor is made to perform routing such that the weight of the node is a possible minimum. We illustrate the robustness of our protocol as it accomplishes increased packet delivery ratio with reduced latency, through simulation results.

关键词： Robustness Routing protocols Mobile ad hoc networks Quality of service Telecommunication traffic Traffic control Ad hoc networks Delay estimation Bandwidth Throughput

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Globally asymptotically stable for exponential type stochastic swarms

Globally asymptotically stable for exponential type stochast...

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2009 2nd International Symposium on Information science and engineering, ISISE 2009

作者： Xue, Zhibin Zeng, Jianchao College of Electric and Information Engineering University of Technology Lanzhou 730050 China Department of Chemical Machinery Chemical Engineering College Qinghai University Xining 810016 China Division of System Simulation and Computer Application Taiyuan University of Science and Technology Taiyuan 030024 China

ISBN: (纸本)9780769539911

A novel Lagrangian "individual-based" isotropic continuous time exponential type stochastic swarming model in an n-dimensional Euclidean space with a family of attraction/repulsion function is proposed in this article. The stability of aggregating behavior of the swarms system are verified by stability theoretical analysis and numerical simulation. Stability analysis and numerical simulations results further indicate that the individual members living in group during the course of coordinative motion can realize the mutual aggregating behavior, the motion of each individual member is a combination of the inter-individual interactions, meanwhile, which are also presented to demonstrate the effectiveness of our model. The attraction/repulsion function is odd, so the attractive force and repulsion force taking effect in opposite direction that leads to aggregation behavior. Moreover, numerical simulation results of globally asymptotically stability analysis also verify the capability of the proposed relevant theories. © 2009 IEEE.

关键词： Stability

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Efficient importance-based Mac scheduling for video streaming in Bluetooth Piconet

Efficient importance-based Mac scheduling for video streamin...

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2009 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC '09

作者： Liu, Jianfeng Liu, Guoping Zhang, Jinfeng Qin, Shaohua Du, Yong Jin, Huihua School of Computer Science Beijing University of Aeronautics and Astronautics Beijing 100083 China Business Application and Product Research Department China Telecom Beijing Research Institute Beijing 100035 China School of Computer Science and Information Engineering Guangxi Normal University Guilin 541004 China Beijing Transportation Information center Beijing 100055 China

ISBN: (纸本)9781424452187

In order to provide the high quality service for transporting video streaming in the Bluetooth Piconet, in which the bandwidth is limited and the structure is heterogeneous, a MAC scheduling algorithm for video streaming in the Bluetooth Piconet is proposed. The main idea of the algorithm is to model the video streaming and calculate the importance of the packet relative to the video quality before transporting. The packet on the transportation is scheduled by the importance in the MAC layer to attain the maximum perceived quality of the overall Slaves in the Piconet. The simulation shows that the proposed algorithm can assign the network resource more efficiently, and improve the perceived video quality of the Slaves in the Piconet more significantly in contrast with the other algorithms. © 2009 IEEE.

关键词： Video streaming

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A Multi-Objective Pareto-Optimal Genetic Algorithm for QoS Multicasting

A Multi-Objective Pareto-Optimal Genetic Algorithm for QoS M...

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IEEE International Advance Computing Conference, IACC

作者： S. C. Rai B. B. Misra A. K. Nayak R. Mall S. Pradhan Department of Computer science and Engineering Silicon Institute of Technology Bhubaneswar India Department of Computer Science and Engineering Indian Institute of Technology Kharagpur India Department of Computer Science and Application Utkal University Bhubaneswar India

The increasing demand of real-time multimedia applications in wireless environment requires stringent quality of service (QoS) provisioning to the mobile hosts (MH). The scenario becomes more complex during group communication from single source to multiple destinations. Fulfilling users demand with respect to delay, jitter, available bandwidth, packet loss rate and cost associated with the communication needs multi-objective optimization (MOO) with QoS satisfaction, is a NP-complete problem. In this paper we propose a multi-objective optimal algorithm to determine a min-cost multicast tree with end-to-end delay, jitter, packet loss rate and blocking probability constraints. The simulation result shows that the proposed algorithm satisfies QoS requirements (like high availability, good load balancing and fault-tolerance) made by the hosts in varying topology and bursty data traffic for multimedia communication networks. The performance of the algorithm for scalability is also highly encouraged.

关键词： Genetic algorithms Quality of service Mobile communication Delay Jitter Multicast algorithms Bandwidth Cost function NP-complete problem Availability

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Practical stability analysis for exponential type stochastic swarms

Practical stability analysis for exponential type stochastic...

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2009 International Conference on Computational Intelligence and Software engineering, CiSE 2009

作者： Xue, Zhibin Zeng, Jianchao College of Electric and Information Engineering Lanzhou University of Technology Lanzhou 730050 China Department of chemical machinery Chemical engineering college Qinghai University Xining 810016 China Division of System Simulation and Computer Application Taiyuan University of Science and Technology Taiyuan 030024 China

ISBN: (纸本)9781424445073

A novel Lagrangian "individual-based" isotropic continuous time exponential type stochastic swarming model in an n-dimensional Euclidean space with a family of attraction/repulsion function is proposed in this article. The stability of aggregating behavior of the swarms system are verified by practical stability theoretical analysis and numerical simulation. Practical stability analysis and numerical simulations results further indicate that the individual members living in group during the course of coordinative motion can realize the mutual aggregating behavior, the motion of each individual member is a combination of the inter-individual interactions, meanwhile, which are also presented to demonstrate the effectiveness of our model. The attraction/repulsion function is odd, so the attractive force and repulsion force taking effect in opposite direction that leads to aggregation behavior. ©2009 IEEE.

关键词： Multi agent systems

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IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： Kavutse Vianney Augustine Huang Dongjun Department of Computer Application Technology School of Information Science and Engineering Central South University Changsha Hunan China

Measurement of image similarity is important for a number of image processing applications. Image similarity assessment is closely related to image quality assessment and is based on the apparent differences between a degraded image and the original, unmodified image. Automated evaluation of image retrieval systems relies on accurate quality measurement of similarity among the input image and the database images. In this paper, we have treated the image under pixel level where we used the mean squared error (MSE) algorithms for measuring similarity between the input image and the training data images, The mean squared error (MSE) simulations have demonstrated its promise through a set of examples by showing its accuracy and low computation cost, though it didn't show good results with precision on similarity of images and for rotated, translated or flipped images hence we proposed the use of minimum circumscribed circle (concentric circles) with local binary pattern and compare the results to get the best image similarity method. Hence comparing different results some improved performance were observed.

关键词： Image retrieval Image processing Image quality Degradation Information retrieval Image databases Pixel Rotation measurement Training data Computational modeling

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Automatic contour extraction for multiple objects based on Schroedinger transform of image

Automatic contour extraction for multiple objects based on S...

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MIPPR 2009 - Automatic Target Recognition and Image Analysis: 6th International Symposium on Multispectral Image Processing and Pattern Recognition

作者： Lou, Liantang Lu, Ling Li, Liguo Gao, Wenliang Li, Lingling Fu, Zhongliang School of Remote Sensing and Information Engineering Wuhan University Wuhan 430072 China School of Science Hubei Province Key Laboratory of Intelligent Robot Wuhan Institute of Technology Wuhan 430073 China Department of Computer Science and Application ZhengZhou Institute of Aeronautical Industry Management Zhengzhou 450015 China

ISBN: (纸本)9780819478061

Analytical and numerical solutions of the Schroedinger Equation which was satisfied by the propagator P(b, a) , including all the paths contribution, are discussed. The definition of Schrödinger transform of image is first proposed. Exterior and interior of objects are obtained from Schroedinger transforms of original image and its inverse image. Using the bruteforce algorithm, sets of exterior and interior points are thinned. By finding pairs of exterior and interior points with the smallest distance between them, contours of multiple objects are extracted. Some experiments with simulated and real images are given. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Extraction

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Research on answer extraction method for domain question answering system(QA)

Research on answer extraction method for domain question ans...

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2009 International Conference on Computational Intelligence and Security, CIS 2009

作者： Mao, Cun-Li Li, Li-Na Yu, Zheng-Tao Han, Lu Guo, Jian-Yi Lei, Xiong-Li School of Information Engineering and Automation Kunming University of Science and Technology Kunming 650051 China Institute of Intelligent Information Processing Computer Technology Application Key Laboratory of Yunnan Province Kunming 650051 China School of Computer Science and Technology Kunming College of Metallurgy Kunming 650093 China School of Architecture and Arts Kunming College of Metallurgy Kunming 650093 China

ISBN: (纸本)9780769539317

The domain knowledge has a direct impact on the result of question - answering (Q & A) in the restricted domain Question Answering System (QA). In this paper, a method of answer extraction for domain Chinese question-and-answer (Q&A) is proposed, which based on the analysis of interrogative sentence and the answer type, carrying on the text retrieval with the help of the domain knowledge and obtaining the relevant paragraphs of the question as the candidate answer. For the question of numeral or list entity type, extracted the question center related domain entity as the answers by adopting the naming entity recognition. For the definition questions, the sentences or paragraphs with higher relevance can be extracted to become the answer based on the relevance ranking between the candidate sentences or paragraphs and questions by combined the computing method of keywords weighting and the method of semantic similarity between the sentences and questions. Experimented on the answer extraction in Yunnan tourism domain, the results show that more remarkable effects have been achieved by adopting the method of answer extraction from domain Chinese question-and-answer. © 2009 IEEE.

关键词： Domain Knowledge

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