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DESIGN OF SPEECH INFORMATION HIDING TELEPHONE

DESIGN OF SPEECH INFORMATION HIDING TELEPHONE

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： WU Zhi-jun NIU Xin-xin YANG Yi-xian Civil Aviation University of China, Tianjin 300300, China Beijing University of Posts and Telecommunications, Beijing 100876, China

Speech Information Hiding Telephone (SITH) is a newsteganography scheme based on information hiding securitytechnique system. The overall system is designed in embeddingmethod, using one flxed point DSP TMS320C54x and threefloating DSPs TMS320C31. and a single-chip micro-controller, allDSPs working parallel in speech processing. It is designed forsecure and covert communication when a speech is transmittedover Public Switching Telephone Network (PSTN).

关键词： Speech information hiding telephone (SIHT) Steganography Information hiding

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A Novel Modulation

A Novel Modulation

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Wang Zhensong Zhang Xiaozhen Institute of Computing Sciences, Academia Sinica Beijing 100080 Institute of Electronics, Academia Sinica Beijing 100080

The technique of the Linear FM wasproposed to solve the problem of the inter-symbol interferencein this paper. For comparing with other modulation technique,we analyze the BER, and present the simulation results. Thetheoretical prediction and the simulation results indicate that theLinear FM is very useful to depress the inter-symbolinterference. The high transmitting speed is holding in somearea where the average of the multi-path time dispersion islarger. Merits of the Linear FM are that it is not necessary tohave an equalizer or the spread spectrum modulation.

关键词： linear FM. signal compression ratio inter-symbol interference bit error rate

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A New Accuracy Evaluation Criterion for Binary Classifiers

A New Accuracy Evaluation Criterion for Binary Classifiers

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Peng Xinguang Liu Yushu Wang Tie Wu Yushu Yu Xueli Department of Computer Science and Engineering, Beijing Institute of Technology, Beijing 100081 China College of Information Engineering, Taiyuan University of Technology,Taiyuan Shanxi 030024 China School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081 China

A new evaluation criterion used for pre-dicting accuracy of binary classifiers for identifyinghigh risk components in the software engineering isproposed in the paper on the basis of analysis of thepresented measure criterions so as to achieve as thehigh prediction accuracy as possible. The proposedevaluation criterion completely eliminates deficienciesof the current criterions, and it entirely independentsupon the proportion of high risk components in thecomponent set. Many different examples make surethat results of evaluation are assuredly the results ofprediction.

关键词： Binary classifier Accuracy evaluation Prediction result Component set High risk proportion

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STUDY ON FUZZY PD CONTROL OF PLANAR TWO-LINK FLEXIBLE MANIPULATOR

STUDY ON FUZZY PD CONTROL OF PLANAR TWO-LINK FLEXIBLE MANIPU...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： PENG Guangzheng WANG Xuesong XUE Yang College of Computer and Control, Beijing Institute of Technology, Beijing China, 100081

In this paper, we emphasized on the research ofdynamic nonlinear control of planar two-link flexiblemanipulators. The flexible manipulator is a nonlinear and strongcoupling dynamic system, and the complicated control system ofwhich has a bad control property of real time and *** to the control problems above, the fuzzy composedcontroller with a nonlinear compensatory and a PD controller isproposed by well considered both the dynamic and static controlproperties of the system. At last, the control method is verifiedby computer simulation, based on the dynamic model of a planartwo-link flexible manipulator. The simulation results show thatthe control strategy has a good result on the elastic vibrationreducing of flexible manipulators.

关键词： flexible manipulator fuzzy control PD control

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NEW ADAPTIVE ALGORITHM FOR VIDEO WATERMARKING

NEW ADAPTIVE ALGORITHM FOR VIDEO WATERMARKING

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： ZHU Zhongjie JIANG Gangyi YU Mei WU Xunwei Dept. of Information and Electronics Engineering, Zhejiang University, Hangzhou 310027 Institute of Circus and Systems, Ningbo University, Ningbo 315211 National Key Laboratory of ISDN, Xidian Univ., Xi'an, Shanxi 710071

In this paper, a new adaptive watermarkingalgorithm is presented for video image coding. Withoperating compressed video data-stream directly, we embedwatermarking information into motion vectors. According towatermarking information and the feature vectors of motionvectors, the proposed algorithm can adaptively selectembedding scheme with the aim to get good watermarkedimage quality. Watermark is extracted blindly withoutoriginal images and experimental results show that theproposed algorithm has a good compatibility with thepresent compression standards, and it is very simple andefficient.

关键词： video watermarking feature vectors compressed domain adaptive watermarking algorithm

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A Heuristic Method of Logical Topology Design In WDM Optical Networks

A Heuristic Method of Logical Topology Design In WDM Optical...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： Kaoru SEZAKI The Institute of Industrial Science University of Tokyo Komaba 4-6-1 Meguro-ku Tokyo 153-8505 JAPAN

WDM optical networks represent the direc-tion to the future high capacity wide-area network applica-tions. By creating the optical paths between several nodesin the core networks, logical topology can be created overthe physical topology. In this paper we consider themethod of designing logical topology in wavelengthrouted all optical networks. The exact formulation of thelogical topology problem is usually given as a Mixed In-teger Linear Programming, but it grows intractable withincreasing size of network. Heuristic approaches havebeen proposed, here we also proposed a different heuristicapproach to determine the logical topology, and compare itwith other methods.

关键词： WDM networks Logical topology design Heuristic method

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A SIMPLIFIED METHOD FOR CALCULATING THE IMPULSE RESISTANCE OF VERTICAL GROUNDING RODS

A SIMPLIFIED METHOD FOR CALCULATING THE IMPULSE RESISTANCE O...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： ZHANG Xiaoqing Department of Electric Engineering. Northern Jiaotong University. Beijing 100044. China

A simplified method is proposed for calculatingthe impulse resistance of vertical grounding rods. Theanalytic formula is first derived to determine the low currentresistance and then the calculation procedure is developedto estimate the impulse resistance. In the procedure, anoulinear relationship is introduced to characterize theelectric field and current density in the ionization zonesurrounding the grounding rod. The effective radius of thegrounding rod is evaluated according to the nonlinearrelationship. The impulse resistance is calculated bysubstituting the effective radius into the analytic formula ofthe low current resistance. Finally. a comparison is madebetween calculated and measured results in confirmation ofthe validity of the proposed method.

关键词： pounding rod impulse resistance ground potential rise

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TRANSIENT STABILITY ENHANCEMENT OF AC TRANSMISSION SYSTEM USING STATCOM

TRANSIENT STABILITY ENHANCEMENT OF AC TRANSMISSION SYSTEM US...

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： S.H.Hosseini A. Aiami Electrical Engineering Department.Tabriz University Tabriz Iran 711-51664 Electrical Engineering Department Tabriz University Tabriz Iran 711-51664

The static synchronous compensator (STATCOM) isone type of FACTS devices which resembles in many respects arotating synchronous condenser used for voltage control andreactive power compensation. The STATCOM can increasetransmission capacity damping low frequency oscillation, andimproving transient stability This paper presents a control blockdiagram of STATCOM for the transient stability *** SIMULINK/MATLAB software package is used forsimulation of test system. In this paper the STATCOM isconnected to the 230KV line for a typical two machinetransmission system. The study demonstrates that STATCOMnot Only considerably improves transient stability but alsocompensates the reactive power in steady state.

关键词： FACTS STATCOM ASVC transient stability

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A new Approach to Third-Order Common-Base Transistor Circuit

A new Approach to Third-Order Common-Base Transistor Circuit

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2002年ieee十区计算机、通信、控制和电机工程会议

作者： Tao Wang Jianjun Hou Jingtang Wu Northern Jiaotong University, Beijing, China, 100044

The third-order common-base transistor circuitreported firstly in [2] is a kind of chaotic signalgenerator, which can be easily realized in anylaboratory. The principal purpose of this paper isstudying the dynamics and great variety ofone-parameter bifurcation phenomena in it. Computersimulation and laboratory experiment are used toanalyze its characteristics. Several strange attractors,the intermittent attractor, periodic windows, cascades ofperiod doubling, period plus two and period minus onephenomena are observed by adjusting the value of aninductor. The computer simulation results agree withthe experiment results quite nicely.

关键词： Chaos Third-order common-base transistor Chaotic signal generator

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ROBUST SPEECH DETECTOR FOR SPEECH RECOGNITION APPLICATIONS

ROBUST SPEECH DETECTOR FOR SPEECH RECOGNITION APPLICATIONS

引用

2002年ieee十区计算机、通信、控制和电机工程会议

作者： LIANG Wei-Qian CHEN Yi-Ning SHAN Yi-Xiang LIU Jia LIU Run-Sheng Department of Electronic Engineering, Tsinghua University Beijing 100084, China

The speech detector takes the significant role in thepractical speech recognition system. In this paper, wepropose a novel finite state machine based speechdetector (FSD) featured with real-time merit. The inputof the FSM comes from a frame-energy detector on theprinciple of logarithm maximum likelihood as well as azero-crossing detector. Experimental results based onboth an isolated word recognition system and acontinuous speech recognition system prove that the FSDis feasible and robust.

关键词： frame FSD ROBUST SPEECH DETECTOR FOR SPEECH RECOGNITION APPLICATIONS

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