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IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Guoliang He Naixue Xiong Athanasios V. Vasilakos Yuanxiang Li Zhongzhi Shi State Key Laboratory of Software Engineering Wuhan University of China Wuhan China Key Laboratory of Intelligent Information Process Institute of Computing Technology Chinese Academy and Sciences Beijing China Department of Computer Science Georgia State University USA Department of Computer Science Saint Francis Xavier University Canada

Since the scalability of logic circuits is becoming larger and more complex, the auto-design is becoming more and more difficult. In order to improve automatic design and performance evaluation of logic circuits in efficiency and capability of optimization, multiobjective simulated annealing (MSA) based increasable evolution approach is designed to evolve logic circuits automatically with an extended matrix encoding method, which can be able to reflect the potential performance of a circuit and reduce the risk of deleting a circuit with a good developing potential during evolution is devised. In the process of evolution, each individual is renewedly associated to a corresponding objective in terms of a novel adaptive evaluation method at each generation. In experiments, complicated arithmetic circuits are designed to assess the performance of MSA against other algorithms. Results indicate that the proposed method could design logic circuits efficiently.

关键词： Logic circuits Encoding Hardware Scalability Circuit simulation Simulated annealing Genetic algorithms Laboratories Computer science Arithmetic

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Design and Implement of Digital Modulator Based on Improved DDS technology and DSP Builder

Design and Implement of Digital Modulator Based on Improved ...

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Kangshun Li Xiaoqiao Lu Wensheng Zhang Feng Wang School of Information South China Agricultural University Guangzhou China School of Information Engineering Jiangxi University of Science and Technology Jiangxi China Institute of Automation Chinese Academy and Sciences Beijing China State Key Laboratory of Software Engineering Wuhan University of China Wuhan China

In this paper, according to the basic theory of digital modulator, the design model of digital modulator is built by using the improved Direct Digital Synthesizer (DDS) technology through running the Matlab/DSP Builder environment. Firstly,analyse the function of each module in this model and simulate the grade of algorithms to it and also produce VHDL language, then carry on Register Transport Level (RTL) grade simulation to the model in Modelsim. In the end, it also introduces the way to realize digital modulator in Field Programmable Gate Array (FPGA) chip, which verify the correctness and validity of the model. This design can not only produce many kinds of the digital signal modulation, but can also simplify the hardware circuit of the modern system greatly and save plenty of the system resources and improve the reliability and flexibility, what is more, compared with other designs, the performance price ratio of the design has advantage in modulated signal device and possess certain practicability and usefulness.

关键词： Digital modulation Digital signal processing Mathematical model Signal design Field programmable gate arrays Synthesizers Registers Modulation coding Hardware Flexible printed circuits

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New method of processing the boundary problem in the empirical mode decomposition (EMD)

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beijing Gongye Daxue Xuebao / Journal of beijing University of technology 2009年第5期35卷 626-632页

作者： Du, Xiu-Li He, Li-Zhi Key Laboratory of Urban Security and Disaster Engineering Ministry of Education Beijing University of Technology Beijing 100124 China E and T Co. Ltd. Beijing 100016 China

Based on deeply studying and analyzing Hilbert-Huang transform (HHT), a so-called semi-periodical-semi-symmetrical method is presented in this paper to deal with the boundary problem resulting in error during the process of the empirical mode decomposition (EMD). It is proved that this method is very valid and has high precision by many experiments of signal simulations and comparison between the results from this method and those from the EMD method.

关键词： Empirical mode decomposition

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Novel evidence combination method based on proportional conjunctive and complementary pooling criterion

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2009年第1期37卷 95-100页

作者： Lang, Feng-Hua Gu, Li-Ze Yang, Yi-Xian Niu, Xin-Xin Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defence Technology Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing 100876 China

To solve the drawbacks of Dempster rule and improved rule of combination, a novel evidence combination method based on proportional conjunctive and complementary pooling criterion was presented. Firstly, the advantages and disadvantages of Dempster rule of combination were analyzed. Secondly, a new mass function based on proportional belief criterion of conjunctive and complementary belief was combined. Finally, the results of numerical examples show that the proposed approach of combination can not only maintain the advantages of original Dempster rule of combination, but also make up for its disadvantages.

关键词： Conjunctive and complementary pooling Dempster rule of combination Evidence theory Proportional belief assignment

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Overview security analysis of 3G authentication protocols and technical specifications

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Qinghua Daxue Xuebao/Journal of Tsinghua University 2009年第SUPPL. 2期49卷 2193-2199页

作者： Cao, Chenlei Zhang, Ru Niu, Xinxin Zhou, Linna Zhang, Zhentao Information Security Centre of State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Key Laboratory of Network and Information Attack and Defense Technology of Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China Department of Electronic Engineering Tsinghua University Beijing 100084 China National Cyber-Net Security Ltd Beijing 100088 China

This paper presents an analysis of 3GPP (3rd generation partnership project) security protocols and related technical specifications to further development of the 3G (3rd-generation) security protocol standards. A mathematical model of the authentication traffic throughput was developed based on the theory of independent and identically distributed probabilities. The research identifies some security vulnerabilities in these protocols, such as the unidirectional process of entity authentication and the unbalanced distribution of authentication traffic, as well as the system complexity. Future development of the 3G security authentication mechanism can be based on IBC (identity-based cryptography) theory.

关键词： Authentication

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Dynamic Output Feedback Control for a Class of Stochastic Time-Delay Systems

Dynamic Output Feedback Control for a Class of Stochastic Ti...

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2009 American Control Conference (ACC 2009)

作者： Lin Li Yingmin Jia Junping Du Shiying Yuan 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 P.R. China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan P.R. China

ISBN: (纸本)9781424445233

This paper is concerned with the problem of robust control for a class of uncertain stochastic systems with discrete and distributed time-varying delays via dynamic output feedback control. The parameter uncertainties of system matrices are assumed to be norm-bounded. The purpose is to design a dynamic output feedback controller such that the closed-loop system is robustly stochastically stable for all admissible parameter uncertainties. Based on the stability theory of stochastic systems, a new delay-dependent sufficient condition for the existence of such a controller is obtained and the corresponding controller design method is proposed in terms of linear matrix inequality (LMI). Numerical examples are included to illustrate the effectiveness and the benefits of the proposed method.

关键词： Output feedback Control systems Stochastic systems Robust control Uncertain systems Time varying systems Stability Delay systems Sufficient conditions Design methodology

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Design of high-speed network intrusion detection system architecture

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Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of technology 2009年第SUPPL. 1期41卷 198-200页

作者： Yao, Wen-Bin Wang, Cong Liu, Jian-Yi Si, Yan-Fang Yang, Yi-Xian National Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Department of Computer Science and Technology Harbin Engineering University Harbin 150001 China

Parallel approach is an important way to improve the performance of networked based intrusion detection system. A parallel architecture of intrusion detection system based on the ideas of combining twice data-flow partition with real-time load balancing feedback is presented. The components of data-flow partition and its optimized algorithm are designed and implemented. The experiment shows that the architecture may have higher speed and lower packet loss in high-speed network circumstance. Thus, it may raise the speed of data transmission and improve the efficiency of parallel intrusion detection.

关键词： Intrusion detection

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Combining opportunistic routing with dynamic source routing for wireless mesh networks

Combining opportunistic routing with dynamic source routing ...

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IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2009)

作者： Qiang Shen Xuming Fang Sunmyeng Kim Rong He High Performance Network Lab Institute of Acoustics Chinese Academy and Sciences Beijing China Provincial Key Laboratory of Information Coding and Transmission Southwest Jiaotong University Chengdu China School of Computer and Software Engineering Kumoh National Institute of Technology Gyeongbuk South Korea

Routing in wireless mesh networks presents a great challenge due to unreliable wireless links and collisions. Recently, a new routing method, opportunistic routing (OR), is proposed to deal with them by exploiting broadcast nature of wireless networks. OR relies on the global knowledge of networks to select relays and determine priorities. In this paper, we propose a new routing scheme, OxDSR, which combines OR and dynamic source routing (DSR) and performs opportunistic transmissions with the help of the local information and the traditional route obtained by DSR. By taking the duplicates and additional wireless resource consumed by multiple ACK frames into consideration, we propose a new metric, equivalent data rate, to select and prioritize relays. Extensive simulation study shows that the proposed OxDSR is more resilient and achieves higher throughput than DSR based on the expected transmission count routing metric.

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The design of intelligent expert classifier for featured crop mapping combining spectral library

The design of intelligent expert classifier for featured cro...

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International Conference on Geoinformatics

作者： Li-gang Fang Hong-li Li Shui-sen Chen Jiangsu Province Support Software Engineering R&D Center for Modern Information Technology Application in Enterprise Suzhou China 215104 Key Laboratory of Resources Remote Sensing & Digital Agriculture Ministry of Agriculture Beijing China Public Laboratory of Geoinfomatica of Guangdong Province Guangzhou Institute of Geography Guangzhou China

ISBN: (纸本)9781424445622

In the study, a module was designed which was used to estimate yield of crop (such as lychee, banana and sugarcane etc) using spectral library of featured crops of South China. An approach combining spectral library with expert system classification methods by spatial data mining techniques is present. Being one of spatial data mining techniques, inductive learning algorithm is used to discover knowledge of spectral library for the expert system and is designed specially for monitoring featured crops of South China. So the intelligent expert classifier can make use of spectral data, attribute data and spatial data of spectral library to extract information of South China's featured crops. The study pre-defined some attributes of inductive learning algorithm which are in favor of featured crops mapping, for improving the efficiency of algorithm and ensuring the usability of rules. The estimation of lychee planting area of Shenzhen city in 2005 was presented as a case study. The following classification rules of lychee were acquired by running inductive learning algorithm: for example, 0.062< reflectance of TM2 <0.071, 0.47

关键词： Crops Libraries Data mining Expert systems Monitoring Yield estimation Algorithm design and analysis Usability Cities and towns Reflectivity

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A Novel Interacting Multiple Model Algorithm Based on Multi-sensor Optimal Information Fusion Rule

A Novel Interacting Multiple Model Algorithm Based on Multi-...

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2009 American Control Conference (ACC 2009)

作者： Xiaoyan Fu Yingmin Jia Junping Du Shiying Yuan Seventh Research Division Beihang University (BUAA) Beijing 100083 P.R. China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 P.R. China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan P.R. China

ISBN: (纸本)9781424445233

In this paper, a novel interacting multiple model (IMM) algorithm is proposed, which utilizes a multi-sensor optimal information fusion rule to combine multiple models in the linear minimum variance sense instead of famous Bayes' rule. Furthermore, the diagonal matrices are used as the updated weights of models, which are applied to distinguish the effects produced by different dimensions of state, so the new algorithm is named as diagonal interacting multiple model (DIMM) algorithm. Extensive Monte Carlo simulations indicate that the proposed DIMM algorithm has better accuracy of estimation than the IMM algorithm with no increase in the execution time, which confirm that the DIMM algorithm is a competitive alternative to the classical IMM algorithm.

关键词： Covariance matrix State estimation Change detection algorithms Laser radar Optimal control Radar tracking Target tracking Radar detection Laser modes Laser transitions

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