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8th International Conference on Intelligent Computing Technology, ICIC 2012

作者： Wang, Xiao-Feng Min, Hai Key Lab. of Network and Intelligent Information Processing Department of Computer Science and Technology Hefei University Hefei Anhui 230022 China Intelligent Computing Lab. Hefei Institute of Intelligent Machines Chinese Academy of Sciences P.O.Box 1130 Hefei Anhui 230031 China Department of Automation University of Science and Technology of China Hefei Anhui 230027 China

ISBN: (纸本)9783642315879

In this paper, an efficient two-stage segmentation framework was proposed to address the plant leaf image with overlapping phenomenon, which is built based on the leaf approximate symmetry and level set evolution theory. In the pre-segmentation stage, a straight line was manually set on the target leaf to approximate the principal leaf vein and the Local Chan-Vese (LCV) model was used on the global image region to help searching the so-called un-overlapping contour in target leaf. In the formal segmentation stage, the symmetry detection was performed based on the pre-defined approximated principal vein to obtain the narrow-band evolution region and the second initial contour. Next, the LCV model was once again used to find the complete target leaf contour in the narrow-band evolution region. Finally, experiments on some real leaf images with overlapping phenomenon have demonstrated the efficiency and robustness of the proposed segmentation framework. © 2012 Springer-Verlag.

关键词： Image segmentation

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Gossip-based indexing ring topology for 2-dimension spatial data in overlay networks

Gossip-based indexing ring topology for 2-dimension spatial ...

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2012 International Workshop on Information and Electronics Engineering, IWIEE 2012

作者： Zou, Z.Q. Wang, Y. Hu, B. Wang, R.C. College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China

Overlay networks are used widely in the Internet, such as retrieval and share of files, multimedia games and so on. However, in distributed system, the retrieval and share of 2-dimension spatial data still have some difficult problems and can not solve the complex retrieval of 2-dimension spatial data efficiently. This article presents a new indexing overlay networks, named 2D-Ring, which is the ring topology based on gossip for 2-dimension spatial data. The peers in our overlay networks exchange the information periodically and update each local view by constructing algorithm. 2-dimension spatial data is divided by quad-tree and mapped into control points, which are hashed into 2D-Ring by SHA-1 hash function. In such way, the problem of 2-dimension spatial data indexing is converted to the problem of searching peers in the 2D-Ring. A large of extensive experiments show that the time complexity of constructing algorithm of 2D-Ring can reach convergence logarithmically as a function of the network size and hold higher hit rate and lower query delay. © 2011 Published by Elsevier Ltd.

关键词： Overlay networks

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CCA-secure unidirectional proxy broadcast re-encryption in the standard model

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Journal of Computational Information Systems 2012年第14期8卷 5909-5916页

作者： Sun, Jin Hu, Yupu Department of Application Mathematics in Xi'an University of Technology Xi'an 710048 China Key Lab. of Computer Network and Information Security Xidian University Xi'an 710071 China

Considering construct a chosen-ciphertext secure unidirectional PRE in the adaptive corruption model is still an important question and the broadcast encryption with wide applications in the real world, the first CCA-secure unidirectional proxy broadcast re-encryption (PBRE) scheme was proposed under the standard model. By using a new ciphertext component in our scheme, the challenger enable to successfully generate the challenge ciphertext for the adversary, even if the adversary is allowed to adaptively corrupt users. Simultaneously, the PBRE scheme is proven chosen-ciphertext security in the adaptive corruption model. Compared with the best known existing unidirectional PRE scheme, new scheme enjoy the advantages of both higher efficiency and stronger security. © 2011 by Binary Information Press.

关键词： Cryptography

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MOEA/D with iterative thresholding algorithm for sparse optimization problems

MOEA/D with iterative thresholding algorithm for sparse opti...

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12th International Conference on Parallel Problem Solving from Nature, PPSN 2012

作者： Li, Hui Su, Xiaolei Xu, Zongben Zhang, Qingfu Institute for Information and System Sciences Key Lab. for Intelligent Networks and Network Security Xi'an Jiaotong University Xi'an Shaanxi 710049 China School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park Colchester CO4 3SQ United Kingdom

ISBN: (纸本)9783642329630

Currently, a majority of existing algorithms for sparse optimization problems are based on regularization framework. The main goal of these algorithms is to recover a sparse solution with k non-zero components(called k-sparse). In fact, the sparse optimization problem can also be regarded as a multi-objective optimization problem, which considers the minimization of two objectives (i.e., loss term and penalty term). In this paper, we proposed a revised version of MOEA/D based on iterative thresholding algorithm for sparse optimization. It only aims at finding a local part of trade-off solutions, which should include the k-sparse solution. Some experiments were conducted to verify the effectiveness of MOEA/D for sparse signal recovery in compressive sensing. Our experimental results showed that MOEA/D is capable of identifying the sparsity degree without prior sparsity information. © 2012 Springer-Verlag.

关键词： Multiobjective optimization

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2nd World Congress on computer Science and Information Engineering, CSIE 2011

作者： Wang, Haiyan Wang, Ying Yue, Xiwen College of Computer Science Nanjing University of Posts and Telecommunications Nanjing 210003 Jiangsu China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing 210003 Jiangsu China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing 210003 Jiangsu China

ISBN: (纸本)9783642257650

A novel trust transmission method which is based on the similarities of nodes in trust models is proposed in this paper. Trust transmission is evaluated by calculating the similarity between recommenders when trustor does not have direct interaction with trustee. However, when there does not have direct recommenders, trust transmission is realized by guaranteed trust chains. Simulation results show that the proposed method improves the trustworthiness of node behavior to some extent and is practical especially in case when nodes do not know each other. © Springer-Verlag Berlin Heidelberg 2012.

关键词： network security

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A trusted network remediation scheme based on the stability of access terminals

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2nd World Congress on computer Science and Information Engineering, CSIE 2011

作者： Wang, Haiyan Xu, Mingming College of Computer Nanjing University of Posts and Telecommunications 210003 Nanjing Jiangsu China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks 210003 Nanjing Jiangsu China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province 210003 Nanjing Jiangsu China

ISBN: (纸本)9783642257650

To improve the effectiveness of control and remediation of failure access terminals in trusted network, a novel remediation scheme is proposed in this paper. Based on the introduction of a definition of stability of access terminals and the employment of the architecture of trusted network connect(TNC), the proposed remediation scheme can not only realize a dynamic control on terminal's behaviors but also support a trustworthy remediation. Simulation results demonstrate that the proposed scheme is more effective compared with static and integrity-based remediation scheme and significantly improve the speed of remediation. © Springer-Verlag Berlin Heidelberg 2012.

关键词： Remediation

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Wireless MIMO switching with MMSE relaying 2012

Wireless MIMO switching with MMSE relaying

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2012 IEEE International Symposium on Information Theory, ISIT 2012

作者： Wang, Fanggang Liew, Soung Chang Guo, Dongning Institute of Network Coding Chinese Univ. of Hong Kong Hong Kong Hong Kong State Key Lab. of Rail Traffic Control and Safety EIE Beijing Jiaotong Univ. Beijing China Department of Electrical Engineering and Computer Science Northwestern Univ. Evanston IL United States

ISBN: (纸本)9781467325790

A wireless relay which forms a one-to-one mapping from the inputs (uplinks) to the outputs (downlinks) is called a multiple-input-multiple-output (MIMO) switch. The MIMO switch carries out precode-and-forward, where all users send their signals in the uplink and then the MIMO switch precodes the received vector signal for broadcasting in the downlink. Ideally, each user employs a receive filter to recover its desired signal from one other user with no or little interference from other users. We propose a joint design of the precoder and the receive filters to achieve the minimum-mean-square-error (MMSE), assuming full channel state information is availab.e at the relay. Our results indicate that the proposed MMSE relaying scheme outperforms the existing ZF/MMSE schemes. © 2012 IEEE.

关键词： Mean square error

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WSSecTool: A web service security analysis tool based on program slicing

WSSecTool: A web service security analysis tool based on pro...

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2012 IEEE 8th World Congress on Services, SERVICES 2012

作者： Fu, Wei Zhang, Yingzhou Zhu, Xianting Qian, Junyan College of Computer Nanjing University of Posts and Telecommunications Nanjing Jiangsu 210003 China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing Jiangsu 210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Jiangsu Province Nanjing Jiangsu 210003 China Dept. of Computer Science and Technology Guilin Univ. of Electronic Technology Guilin 541004 China

ISBN: (纸本)9780769547565

With the development of web service, more and more attention has been drawn to web service in recent years. However, the damage caused by service security problems is becoming more and more serious nowadays. This paper develops a web service security analysis tool, WSSecTool, which is based on program slicing. This tool includes three modules namely slicing module, safety publishing module and testing module. Slicing module analyzes source codes of web service to generate method dependence graph (MDG). After MDG is generated, the tool slices MDG to detect the unsafe methods and the spread of them. Safety publishing module helps to hide unsafe methods to make them invisible to outer users after publishing. Testing module can test the services published by this tool to validate the correctness and feasibility of our analysis method. The experiments show that our tool is effective and practical. © 2012 IEEE.

关键词： Web services

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Flow inspection router assignment (FIRA) in access/aggregation network clouds

Flow inspection router assignment (FIRA) in access/aggregati...

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32nd IEEE International Conference on Distributed Computing Systems Workshops, ICDCSW 2012

作者： Wang, Jianping Qiao, Chunming Sudhaakar, Raghuram S. Addepalli, Sateesh Jin, Yaohui Argibay-Losada, Pablo Jesus Department of Computer Science City University of Hong Kong Hong Kong Hong Kong Department of Computer Science and Engineering State University of New York Buffalo NY United States Cisco Systems China State Key Lab. of Adv. Opt. Commun. Syst. and Network Shanghai Jiao Tong University Shanghai China Telematic Engineering Department University of Vigo Spain

ISBN: (纸本)9781467314237

Sufficient computing resources availab.e at future generation routers in the access/aggregation networks can be pooled to form a cloud at edge, which we call Access/Aggregation network Cloud (or ANC). An ANC can be used to handle some of the information processing conventionally done inside the enterprise networks. ANC computing can also result in a much less delay and more flexibility than if such information processing is done centrally in a data center in the core. In this paper, we formulate two representative optimization problems related to Flow Inspection Router Assignment (FIRA) in ANCs. Their objectives are to minimize the (weighted) number of flows that still need to be inspected inside the enterprise network when only some flows can be assigned to the ANC due to the additional flow inspection delay in the ANC, and when all the flows can be assigned to the ANC, to minimize the additional flow inspection delay, respectively. We prove the NP-hardness of these two new problems, study their performance bounds and propose efficient heuristics. We further extend the formulation and solution to support multicast flows. Simulation shows that our heuristic algorithms can perform close to their performance bounds, implying their near optimality and the tightness of the bounds. In addition, simulation also demonstrates how inspection computing resources can be reduced for multicast flows. © 2012 IEEE.

关键词： Inspection

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A new application with algebraic multigrid method

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Journal of Information and Computational Science 2012年第6期9卷 1447-1454页

作者： Huang, Ying Xie, Mei Li, Weisheng Lai, Jun Wang, Kuangsheng School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 610054 China Chongqing Key Lab. of Computer Network and Communication Technology Chongqing 400065 China Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China

Algebraic Multi-grid (AMG) method is analyzed and is combined with the graph cut method to extract the texture feature of the image. AMG method can extract more information about the singularities in the image. The data in the coarse grid is utilized to reconstruct the image and the reconstruct result approximates to the original image well. On the basis of the analysis on the AMG method, an energy function is constructed for the texture feature and minimized using max-flow method. Experimental results show that the proposed method can extract more texture details accurately. © 2012 by Binary Information Press.

关键词： Image reconstruction

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