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Combination of the two dominant systems of SVM and GMM-UBM in text-independent speaker verification:SVM-based system using GMM super vector

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Combination of the two dominant systems of SVM and GMM-UBM i...

第九届全国人机语音通讯学术会议

作者： ZHAO Jian2. DONG Yuan1,2. ZHAO Xianyu1, YANG Hao2. LU Liang2. WANG Haila1 (1. France Telecom Research & Development Center, Beijing 100080, China 2. Beijing university of posts and {2., Beijing 100876, China)

In the text-independent speaker verification field, Gaussian mixture model - universal background model strategy and support vector machines are the two most dominant methodologies. Just recently, a newly SVM-based speaker verification method using GMM super vector is proposed and arouses a hot current of research. In this paper, we are focused on the construction of this new speaker verification system and investigating the nuisance attribute projection and test normalization to enhance the performance further. Experiments are conducted on the core task of the 2.06 NIST Speaker Recognition Evaluation corpus. The experimental results indicate that the SVM-based speaker verification sys-tem using GMM super vector, as a combination of the two dominant systems, can achieve better performance. With the use of nuisance attribute projection and test normalization, system performance can be significantly improved further.

关键词： support vector machines Gaussian mixture model super vector nuisance attribute projection test normaliza-tion speaker verification NIST 06 speaker recognition evaluation

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空时网格码的正交构造法

通信学报 2002年第7期23卷 19-25页

作者：李舒张平康桂霞韩承德中国科学院计算技术研究所北京100080 北京邮电大学北京100876

空时编码是实现宽带无线数据通信的一种极有潜力的技术。然而,随着发射天线数目的增加,空时码的构造变得十分困难。本文提出了空时网格码的一种构造方法—正交构造法:这种方法可以根据已知的适用于M根发射天线的空时码来构造适用于KM(K... 详细信息

空时编码是实现宽带无线数据通信的一种极有潜力的技术。然而,随着发射天线数目的增加,空时码的构造变得十分困难。本文提出了空时网格码的一种构造方法—正交构造法:这种方法可以根据已知的适用于M根发射天线的空时码来构造适用于KM(K≥2.根天线的空时码。仿真结果表明,对于相同的码率和和相近的译码复杂度,用正交构造法得到的空时码的差错性能甚至优于通过计算机搜索得到的空时卷积码。

关键词：空时网格码正交构造法空时编码宽带无线数据通信空时码

A New Method for the Development of posts and telecommunications Information System

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The Journal of China Universities of posts and telecommunications 1997年第1期4卷 78-82页

作者： Zhang Feng and Yang Jing (Department of Computer Engineering, Nanjing university of posts and {2., Nanjing 2.0003, P. R. China) ***

A new method for the development of post and telecommunication information systems (PTIS) is presented in the paper. The advantages of traditional methods such as life-cycle method, prototyping method, and object-oriented method are synthesized in the new method. By establishing a general model of PTIS, the new method makes the developing life cycle shorter, quicker and more flexible.

关键词： PTIS general model object-oriented life-cycle prototyping method reengineering requirement engineering

Digital Divide of Internet: Model Analysis and Policy Exploration-A Comparison among China, America and Russia

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China Communications 2008年第1期5卷 45-53页

作者： Hu Zhibing, Tang Shoulian Beijing university of posts and {2., Beijing university of posts and {2. China

A new analytical model is proposed and constructedin this paper through studying the two-stage courseand the marginal replication cost of informationproducts. The economic nature of digital divide isuncovered and that is of the economic value and theallotment styles of information and knowledge. Basedon the proposed model and taken China, Americaand Russia as examples, the empirical analyses areflexibly made and policy explanations for bridgingthe divide are given.

关键词： digital divide ICT economic model policy exploration

Analysis on Implementation of Asymmetric Regulation in China telecommunications Sector

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China Communications 2008年第3期5卷 104-107页

作者： Luo Mingwei Beijing university of posts and {2. Beijing Univ posts & Telecommun Beijing Peoples R China

Reference to the international cases and experiences of asymmetric regulation in telecommunications industry,based on China's legal environment and telecommunications competition in the market,give analysis to the role of asymmetric regulation for the development of china telecommunications market,put forward feasible measures to asymmetric regulation in China.

关键词： telecom asymmetric regulation China

Generalized quantum state sharing of the arbitrary two particles state

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Science China(Physics,Mechanics & Astronomy) 2010年第11期53卷 2064-2068页

作者： WANG Chuan 1,2.ZHANG Yong 1,2.& JIN GuangSheng 1,2.1 School of Science,Beijing university of posts and {2.,Beijing 100876,China 2.Key Laboratory of Optical Communication and Lightwave Technologies,Beijing university of posts and {2.,Beijing 100876,China 1. School of Science Beijing University of Posts and Telecommunications Beijing 100876 China2. Key Laboratory of Optical Communication and Lightwave Technologies Beijing University of Posts and Telecommunications Beijing 100876 China

This paper has proposed a generalized quantum state sharing protocol of an arbitrary two-particle state using non-maximally GHZ states and generalized Bell state *** sender Alice performs two-particle generalized Bell state measurements on her two particles in the state sharing process and the controller takes measurements on his particles and transfers the quantum information to the receiver with entanglement swapping by the cooperation of the other *** is found that the use of nonmaximally entangled state in quantum state sharing has enabled the secure sharing of the quantum state.

关键词： quantum state sharing quantum entanglement arbitrary two particles state

Periodicity Characteristic of TOAD's Switching Window

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Chinese Journal of Lasers 2000年第2期9卷 161-166页

作者： LIU Xianbing,YE Peida (Beijing university of posts and {2., Beijing 100876, China ) 北京邮电大学北京

The periodidity characteristic of switching window of a terahertz optical asymmetric demultiplexer (TOAD) using numerical simulation was investigated. The results show that the switching window width of TOAD changes periodically with the time asymmetry of TOAD and the period is one half of the period of control pulses. The theoretical results agree with the experimental results very well.

关键词： terahertz optical asymmetric demultiplexer (TOAD) Sendconductor optical amplifier (SOA) optical time division multiplexing (OTDM)

telecommunications Market and Regulation in India and Ireland

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China Communications 2008年第2期5卷 83-87页

作者： Chen Xiuyu Beijing university of posts and {2.,China Beijing Univ posts & Telecommun Beijing Peoples R China

Information and communications technology is apillar industry in India and Ireland,playing an increasinglyimportant role in promoting the economicand social *** market competitionpromotes the rapid development of the *** market regulation andconstant legal system improvement can promote thesmooth development of the *** of new technology promotes a sustainabledevelopment of the *** is proposed that the pace of telecommunicationslegislation in China should be furtherquickened,telecommunications market structureoptimized,and telecommunications regulationstrengthened.

关键词： India Ireland telecommunications market regulation

Neighborhood-following algorithms for linear programming

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Science China Mathematics 2004年第6期47卷 812-820页

作者： Al WenbaoSchool of Science, Beijing university of posts and {2., Beijing 100876, China 1. School of Science Beijing University of Posts and Telecommunications 100876 Beijing China

In this paper, we present neighborhood-following algorithms for linear programming. When the neighborhood is a wide neighborhood, our algorithms are wide neighborhood primal-dual interior point algorithms. If the neighborhood degenerates into the central path, our algorithms also degenerate into path-following algorithms. We prove that our algorithms maintain the O9√nL) -iteration complexity still, while the classical wide neighborhood primal-dual interior point algorithms have only the O(nL-iteration complexity. We also proved that the algorithms are quadratic convergence if the optimal vertex is nondegenerate. Finally, we show some computational results of our algorithms.

关键词： linear programming primal-dual interior point methods wide neighborhood methods quadratic convergence