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2010 IEEE 18th International Workshop on Quality of Service, IWQoS 2010

作者： Tang, Shao Jie Yuan, Jing Li, Xiang Yang Liu, Yunhao Chen, Gui Hai Gu, Ming Zhao, Ji Zhong Dai, Guojun Department of Computer Science Illinois Institute of Technology Chicago IL United States State Key Laboratory of Novel Software Technology NanJing University NanJing China Department of Computer Science and Engineering HKUST China Key Laboratory of Information System Security Tsinghua University China Institute of Computer Application Technology Hangzhou Dianzi University China Department of Computer Science and Engineering Xi'An JiaoTong University China

ISBN: (纸本)9781424459889

The benefits of using mobile sink to prolong sensor network lifetime have been well recognized. However, few provably theoretical results remain are developed due to the complexity caused by time-dependent network topology. In this work, we investigate the optimum routing strategy for the static sensor *** further propose a number of motion stratifies for the mobile sink(s) to gather real time data from static sensor network, with the objective to maximize the network lifetime. Specially, we consider a more realistic model where the moving speed and path for mobile sinks are constrained. Our extensive experiments show that our scheme can significantly prolong entire network lifetime and reduce delivery delay.

关键词： Sensor networks

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Group key management using proxy re-encryption for dynamic networks

Group key management using proxy re-encryption for dynamic n...

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2nd International Workshop on Education technology and computer science, ETCS 2010

作者： Zhang, Minqing Wu, Xuguang Han, Yiliang Yang, Xiaoyuan Key Laboratory of Network and Information Security of APF Engineering College of APF China Department of Computer Science and Technology Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9780769539874

Decentralized group key management mechanisms offer beneficial solutions to enhance the scalability and reliability of a secure multicast framework by dividing the whole group into subgroups. However, many of the previous decentralized solutions require the trust key distribution center, or don't exploit the broadcast nature of wireless communication. In the study, a novel group key management scheme is proposed, which employs decentralized group membership, doesn't relay on the trust center, and makes use of the wireless broadcast nature to efficiently accommodate dynamic group changes. The main contributions are: (1) we extend a proxy re-encryption to multi-hop environment, and then develop a distributed protocol for key distribution;(2) in local group communication, we use multi-recipients encryption to broadcast key information reducing communication cost;(3) we analyze the proposed scheme with the previous schemes and the analysis result indicates that the proposed scheme has advantages with regard to the rekeying cost, storage overhead and computation efficiency. © 2010 IEEE.

关键词： Multicasting

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Hydrogen passivation for the performance enhancement of poly-Si crystallized by double-frequency YAG laser

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Optoelectronics Letters 2010年第4期6卷 288-290页

作者：李娟丁思维姚颖罗翀孟志国吴春亚熊绍珍张志林郭海诚 Tianjin Key Laboratory of Photo-electronic Thin Film Devices and Technology Key Laboratory of Opto-electronic Information Science and Technology(Nankai University and Tianjin University) Ministry of Education Institute of Photo-electronics Nankai University Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology

The hydrogen passivation is adopted to enhance the performance of poly-Si crystallized by YAG laser annealing(LA polySi).The effects of passivation time,passivation power and passivation temperature on the hall mobility of the LA poly-Si are investigated and the mechanism of the hydrogen passivation is preliminarily *** is found that the effect of the hydrogen passivation on the qulity of YAG laser annealed poly-Si is also correlated with the deposition method and the defect type in it.

关键词： YAG激光器性能增强氢钝化结晶双频率聚硅激光退火多晶硅

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Reconstructing 3D objects from 2D sectional views of engineering drawings using volume-based method

Reconstructing 3D objects from 2D sectional views of enginee...

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International Conference on Shape Modeling and Applications - Shape Modeling International Conference, SMI 2010

作者： Wen, Yamei Zhang, Hui Yu, Zhongmian Sun, Jiaguang Paul, Jean-Claude School of Software Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Ministry of Education Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China INRIA France

ISBN: (纸本)9780769540726

Sectional views are widely used in engineering practice due to their clear and concise expression. However, it is difficult for computers to understand because of the large numbers of omitted entities and their diversified representations. This paper aims at reconstructing 3D models from 2D sectional views by improving the traditional volume based method. First, we present a two-stage loop searching algorithm to extract desired loops from sectional views. Then, sub-objects are identified by the hint-based feature identification algorithm with an intuitive loop-matching criterion. After that, a model-directed algorithm is proposed to guide the generation of sub-objects which are assembled together to form the final objects. The algorithm can handle full sections, partial sections and offset sections, as well as orthographic views. Multiple sectional views are supported in our algorithm. Moreover, the domain of objects is extended to inclined quadric surfaces and intersecting quadric surfaces with higher order curves. Experiment results show its practicability. © 2010 IEEE.

关键词： Three dimensional computer graphics

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Analyzing and correlating security events using state machine

Analyzing and correlating security events using state machin...

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10th IEEE International Conference on computer and information technology, CIT-2010, 7th IEEE International Conference on Embedded Software and systems, ICESS-2010, 10th IEEE Int. Conf. Scalable Computing and Communications, ScalCom-2010

作者： Feng, Xuewei Wang, Dongxia Zeng, Jiemei Ma, Guoqing Li, Jin National Key Laboratory of Science and Technology on Information System Security Beijing Institute of System Engineer Beijing 100101 China Beijing Aerospace Control Center Beijing 100296 China

ISBN: (纸本)9780769541082

It is unfeasible to analyze the security events by the manual way for the security manager, because the number of the events is huge and the information contained in the events is meaningless. After analyzing the existing algorithms of security events correlation, we propose an attack scenario reconstruction technology based on state machine. The processes of attackers intruding into the cyberspace can be restored and the more comprehensive attack scenario description information will be generated using this technology. This working lets the security manager more comfy. The state machine based attack scenario reconstruction technology processes security events using clustering analysis and causal analysis concurrently, it builds a correlation state machine in memory for every attack scenario tree which is predefined by the security manager, when security events are coming, the certain state machines will process them, if the condition is satisfied, an attack scenario description information will be generated and then sent to the security manager. The correlating technology based on state machine is more timely and accurately, and at last, we use the DARPA2000 Intrusion Scenario Specific Data Sets to validate the technology, the experiment results show that it is feasible to analyze security events using the technology we proposed. © 2010 IEEE.

关键词： Managers

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The transition between sharp and rounded features and the manipulation of incompatible boundary in filling n sided holes

The transition between sharp and rounded features and the ma...

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International Conference on Shape Modeling and Applications - Shape Modeling International Conference, SMI 2010

作者： Shi, Kan-Le Yong, Jun-Hai Liu, Peng Sun, Jia-Guang Paul, Jean-Claude School of Software Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Ministry of Education of China Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China INRIA France

ISBN: (纸本)9780769540726

N -sided hole filling plays an important role in vertex blending. Piegl and Tiller presented an algorithm to interpolate the given boundary and cross-boundary derivatives in B-spline form. To deal with the incompatible cases that their algorithm cannot handle, we propose an extension method to manipulate the transition between sharp and rounded features. The algorithm first patches n crescent-shaped extended surfaces to the boundary with G 2 continuity to handle incompatibility problem in the corners. Then, we compute the inner curves and the corresponding cross-boundary derivatives fulfilling tangent and twist compatibilities. The generated B-spline Coons patches are G1-continuously connected exactly, and have ∈-G 1 continuity with the extended surfaces. Our method improves the continuity-quality of the shape and reduces the count of the inserted knots. It can be applied to all G0- continuous boundary conditions without any restrictions imposed on the boundary or cross-boundary derivatives. It generates better shapes than some popular industrial modeling systems on these incompatible occasions. Some examples underline its feasibility. © 2010 IEEE.

关键词： Interpolation

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Blind image watermark analysis using higher order statistics

Blind image watermark analysis using higher order statistics

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International Conference on Natural Computation

作者： Lu, Wei Sun, Wei Lu, Hongtao Guangdong Key Laboratory of Information Security Technology School of Information Science and Technology Sun Yat-Sen University Guangzhou 510275 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200030 China

ISBN: (纸本)9781424459612

Over the past two decades, great efforts have been made to develop digital watermarking techniques for copyright protection or content verification of digital products. Currently, most of watermark detection methods are designed based on the corresponding specific watermark embedding procedures, which is called symmetrical digital watermarking. In this paper, we propose a general steganalysis scheme to detect the existence of watermark in an image no matter what kind of watermark embedding scheme is used. In the proposed method, discrete wavelet transform (DWT) and higher order local autocorrelations are used to differentiate the intrinsic statistical characteristics between non-watermarked images and watermarked images. Support vector machines (SVMs) are then used to classify these characteristics. Numerical experimental results show that the proposed scheme describes the intrinsic statistical characteristics and the proposed steganalysis method is effective. ©2010 IEEE.

关键词： Higher order statistics

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Bisimulations for open processes in higher order π-calculus

Bisimulations for open processes in higher order π-calculus

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2010 4th International Symposium on Theoretical Aspects of Software Engineering, TASE 2010

作者： Cao, Zining Department of Computer Science and Technology Nanjing University of Aero. and Astro. Nanjing 210016 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215006 China National Key Laboratory of Science and Technology on Avionics System Integration Shanghai 200233 China

ISBN: (纸本)9780769541488

In this paper, we propose open bisimulations for open processes in higher order π-calculus. The equivalence of open bisimulations and other bisimulations for open processes is proved. Furthermore, we present a symbolic operational semantics of higher order open processes, and give some symbolic bisimulations for higher order processes. The relation between symbolic bisimulations and other bisimulations is also studied. At last, we introduce a higher order π-calculus with sum and conditional operators, then we study open bisimulations and symbolic bisimulations for this calculus. © 2010 IEEE.

关键词： Calculations

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Temporal logics and model checking algorithms for ZIAs

Temporal logics and model checking algorithms for ZIAs

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2nd International Conference on Software Engineering and Data Mining, SEDM 2010

作者： Cao, Zining National Key Laboratory of Science and Technology on Avionics System Integration Shanghai 200233 China Department of Computer Science and Technology Nanjing University of Aero. and Astro. Nanjing 210016 China Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou 215006 China

ISBN: (纸本)9788988678213

In this paper, we first propose a specification approach combining interface automata and Z language. This approach can be used to describe temporal properties and data properties of software components. A branching time logic for ZIAs is presented. We then give an algorithm for model checking this logic on ZIAs with finite domain. Furthermore, we present a mu-calculus logic for ZIAs, and give a model checking algorithm for this logic.

关键词： Model checking

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Developing an SVM-based ensemble learning system for customer risk identification collaborating with customer relationship management

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中国高等学校学术文摘·计算机科学 2010年第2期4卷 196-203页

作者： Lean YU Shouyang WANG Kin Keung LAI Institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100190 China Hangzhou Key Laboratory of E-Business and Information Security Hangzhou Normal University Hangzhou 310036 China Institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100190 China Department of Management Sciences City University of Hong Kong Hong Kong China

In this study, we propose a support vector machine (SVM)-based ensemble learning system for customer relationship management (CRM) to help enterprise managers effectively manage customer risks from the risk aversion perspective. This system differs from the classical CRM for retaining and targeting profitable customers; the main focus of the proposed SVM-based ensemble learning system is to identify highrisk customers in CRM for avoiding possible loss. To build an effective SVM-based ensemble learning system,the effects of ensemble members' diversity, ensemble member selection and different ensemble strategies on the performance of the proposed SVM-based ensemble learning system are each investigated in a practical CRM case. Through experimental analysis, we find that the Bayesian-based SVM ensemble learning system with diverse components and choose from space selection strategy show the best performance over various testing samples.

关键词： support vector machines (SVM) ensemble learning diversity strategy selection strategy ensemble strategy customer relationship management (CRM)

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