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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Deyuan Meng Yingmin Jia Junping Du Fashan Yu the Department of Systems and Control Beihang University (BUAA) the Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and TechnologyBeijing University of Posts and Telecommunications the School of Electrical Engineering and Automation Henan Polytechnic University

This paper is concerned with the iterative learning control(ILC) problem for discrete-time systems with iterationvarying *** the so-called super-vector approach to ILC,the discrete domain bounded real lemma is employed to develop a sufficient condition ensuring both the stability and the desired H∞ performance of the ILC *** is shown that this sufficient condition can be presented in terms of linear matrix inequalities(LMIs),which can also determine the learning gain matrix.A numerical simulation example is included to validate the theoretical results.

关键词： Iterative learning control discrete-time systems iteration-varying disturbances H_∞ performance linear matrix inequality

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Distributed H∞ consensus control for networks of multiple agents with linear coupling dynamics

Distributed H∞ consensus control for networks of multiple a...

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SICE Annual Conference

作者： Yang Liu Yingmin Jia Junping Du Fashan Yu Department of Systems and Control Beihang University Beijing China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo Henan China

This paper is devoted to the consensus control for a network of autonomous agents with high-dimension linear coupling dynamics and subject to external disturbances. By transforming the consensus control problem into an H infin control problem, we propose a distributed state feedback protocol, and obtain conditions in terms of linear matrix inequalities (LMIs) to ensure the consensus with a prescribed H infin performance level for networks with zero and nonzero communication delays, respectively. Furthermore, the undetermined feedback matrix of the proposed protocol is also solved. A numerical example is included to validate the theoretical results.

关键词： Control systems Communication system control Protocols Multiagent systems Vehicle dynamics Automatic control Telecommunication control Electronic mail Linear feedback control systems State feedback

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Adaptive multi-class support vector machine for microarray classification and gene selection

Adaptive multi-class support vector machine for microarray c...

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SICE Annual Conference

作者： Juntao Li Yingmin Jia Junping Du Fashan Yu Department of Systems and Control Beihang University Beijing China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo Henan China

This paper proposes an adaptive multi-class support vector machine for simultaneous microarray classification and gene selection. By evaluating the gene ranking significance, the adaptive multi-class support vector machine is shown to encourage an adaptive grouping effect in the process of building classifiers, thus leading a sparse multi-classifiers with enhanced interpretability. Based on a reasonable correlation between the two regularization parameters, an efficient solution path algorithm is developed for solving the proposed support vector machine. Experiments performed on the leukaemia data set are provided to verify the obtained results.

关键词： Support vector machines Support vector machine classification Electronic mail Programmable control Adaptive control Gene expression Learning systems Automatic control Control systems Telecommunication control

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Detection of drive-by downloads based on dynamic page views

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Qinghua Daxue Xuebao/Journal of Tsinghua University 2009年第SUPPL. 2期49卷 2126-2132页

作者： Zhang, Huilin Zhuge, Jianwei Song, Chengyu Han, Xinhui Zou, Wei Institute of Computer Science and Technology Peking University Beijing 100871 China Key Laboratory of Network and Software Security Assurance of Ministry of Education Peking University Beijing 100871 China

A dynamic page view based drive-by download detection method was developed to address the challenge hidden drive-by downloads which abuse inline linking dynamics creation and obfuscation. The method uses a script engine to execute page scripts with tools to reveal the script's actions and inline linking identification mechanisms and rebuilds the dynamic page view of the visited page by recursively analyzing the inline pages. The system then detects drive-by downloads based on the rebuilt dynamic page view. Tests on a prototype based on the open-sourced PHoneyC framework to detect 89 drive-by download samples showed that single page views in this paper had a detection rate of 29.2%, static page views had a detection rate of 43.8%, and the dynamic page views had a detection rate of 70.8%. Thus, the dynamic detection method has a much higher detection rate.

关键词： Network security

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Analysis and improvement of ZG off-line TTP non-repudiation protocol

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Tongxin Xuebao/Journal on Communications 2009年第11 A期30卷 44-51页

作者： Liu, Dong-Mei Qing, Si-Han Li, Peng-Fei Li, Shang-Jie National Engineering Research Center for Fundamental Software Institute of Software Chinese Academy of Sciences Beijing 100080 China Engineering Research Center for Information Security Technology Institute of Software Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China National Key Laboratory of Integrated Information System Technology Chinese Academy of Sciences Beijing 100080 China

Based on the weakness of ZG off-line TTP(trusted third party) non-repudiation protocol because of using protocol deadline, the improvement of the ZG off-line TTP non-repudiation protocol was given, which eliminated the delaying resolve request attack and ensured non-repudiation and fairness. Therefore, two kinds of improvement of ZG off-line TTP non-repudiation protocol were given, which had different point of focus. Among them, the first one could eliminate delaying message attack in ZG protocol;the second one also had the property of preventing the abuse of sub-protocol besides eliminating delaying message attack. The first one is suitable for electronic payment and certified email, but the second one is suitable for digital contract signature.

关键词： Fair non-repudiation protocol Fairness Non-repudiation Timeliness

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A New Support Vector Machine for Microarray Classification and Adaptive Gene Selection

A New Support Vector Machine for Microarray Classification a...

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2009 American Control Conference (ACC 2009)

作者： Juntao Li Yingmin Jia Junping Du Fashan Yu Seventh Research Division Beihang University (BUAA) Beijing 100191 China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan China

ISBN: (纸本)9781424445233

This paper presents a new support vector machine for simultaneous gene selection and microarray classification. By introducing the adaptive elastic net penalty which is a convex combination of weighted 1-norm penalty and weighted 2-norm penalty, the proposed support vector machine can encourage an adaptive grouping effect and reduce the shrinkage bias for the large coefficients. According to a reasonable correlation between the two regularization parameters, the optimal coefficient paths are shown to be piecewise linear and the corresponding solving algorithm is developed. Experiments are performed on leukaemia data that verify the research results.

关键词： Gene selection grouping effect microarray classification solution path support vector machine (SVM) Support Vector Network penalty Self tuning Microarray

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Network security situational awareness model based on information fusion

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Jisuanji Yanjiu yu Fazhan/Computer Research and Development 2009年第3期46卷 353-362页

作者： Wei, Yong Lian, Yifeng Feng, Dengguo Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China

security situational awareness has become a hot topic in the area of network security research in recent years, which attracts the interest of more and more domestic and foreign researchers. The existing security situational awareness methods are analyzed and compared in detail. Considering the characteristics of multi-source information in network security research, a new network security situational awareness model based on information fusion is proposed. This model fuses multi-source information from a mass of logs by introducing the modified D-S evidence theory, gets the values of nodes security situational awareness by situational factors fusion using attacks threat and vulnerability information which network nodes have and successful attacks depend on, computes the value of network security situational awareness by nodes situation fusion using service information of the network nodes, and draws the security-situation-graph of network. Then, it analyzes the time series of the computing results by ARMA model to forecast the future threat in network security. Finally an example of actual network datasets is given to validate the network security situational awareness model and algorithm. The results show that this model and algorithm is more effective and accurate than the existing security situational awareness methods.

关键词： Time series analysis

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Network security situational awareness model based on log audit and performance correction

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Jisuanji Xuebao/Chinese Journal of Computers 2009年第4期32卷 763-772页

作者： Wei, Yong Lian, Yi-Feng Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China

This paper analyzes and compares the existing situational awareness methods and proposes a network security situational awareness model based on log audit and performance correction algorithm. First, nodes theoretic security threat is got by log audit and the value of nodes security situation is computed by performance correction algorithm. Then the value of network security situation is computed using service information, the future threat is predicted by several prediction models, and the security Situational Graph (SSG) is drawn. Finally an example is given to validate the network security situational awareness model and algorithm by simulation software. The example proves that the model is more effective and accurate to reflect the network security situational and its trends than traditional methods.

关键词： Network security

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Verification method of security model based on UML and model checking

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Jisuanji Xuebao/Chinese Journal of Computers 2009年第4期32卷 699-708页

作者： Cheng, Liang Zhang, Yang Department of Electronic Engineering and Information Science University of Science and Technology of China Hefei 230027 China Stale Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences Beijing 100190 China

As the development of security operating system, the formal analysis and verification of the security models has been one of the hottest topics now. A new method to verify the correctness of security models is proposed in this paper based on the study of predecessors' work, which made use of the Unified Modeling Language (UML) and model checking. This approach first used the UML to specify the security model in the form of finite state machine diagrams and the class diagrams, and then translated these UML diagrams to the input language of model checkers. And it used the model checker to verify the model's correctness or the violation of security properties for the last step. The authors demonstrate the violation of confidentiality of the DBLP and SLCF model by the new approach.

关键词： Model checking

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Fast KD-tree construction method by probing the optimal splitting plane heuristically

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Jisuanji Xuebao/Chinese Journal of Computers 2009年第2期32卷 185-192页

作者： Fan, Wen-Shan Wang, Bin Department of Computer Science and Technology Tsinghua University Beijing 100084 China School of Software Tsinghua University Beijing 100084 China Key Laboratory for Information System Security Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Beijing 100084 China

In the field of ray-tracing based photo-realistic rendering, kd-tree is used as an important acceleration structure. This paper focuses on the effective construction of kd-tree, and proposes a novel and fast construction method which is based on the binning algorithm. The method is composed of two main steps. Firstly, by analyzing the SAH cost function, the method determines the most-likely sub-span which holds the splitting plane. Secondly, sub-sampling is used on the resulted span to get much better approximation to the optimal splitting plane. Moreover, the paper discusses the exiting schemes on binning termination condition, points out their problems, and proposes a more reasonable termination condition. The experimental results show that the novel approach is effective. Compared with the previous works, it decreases the construction overhead, improves the quality of generated kd-tree, and the construction procedure is more robust as well.

关键词： Ray tracing

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