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Speech emotion recognition using PCA-based spectral features and HMM

Journal of Information and Computational Science 2009年第2期6卷 741-747页

作者： Wei, Xiaopeng Zhao, Lasheng Zhang, Qiang School of Mechanical Engineering Dalian University of Technology Dalian 116024 China Key Laboratory of Advanced Design and Intelligent Computing Dalian University Dalian 116622 China

In recent years, speech emotion recognition has attracted more and more attention. In this paper, using PCA-based spectral features of the speech signal and HMM, we present a new framework for the text independent recognition of emotions from voice. Contrary to the traditional feature extraction method based on principal components analysis(PCA), the proposed PCA-based spectral features are computed on each set of data belonging to different emotion, rather than on the whole training set, moreover, each emotion subspace is constructed with the eigenvectors corresponding to the smaller eigenvalues rather than the bigger eigenvalues. Then, the proposed features are used to train HMM for realizing the speech emotion recognition. For finding the effectiveness of these features in recognition of different emotions in different languages, two different data-sets are used to evaluate the proposed method: the Danish emotional speech database and the Chinese emotional speech database. For the Danish database, it was shown that higher classification rate can be achieved on the new feature vectors extracted by proposed method. The proposed features, traditional PCA-based spectral features and original spectral features yielded close classification performance for the Chinese database. Copyright ©2009 Binary Information Press.

关键词： Principal component analysis

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An image scrambling method based on chaos in low intensity laser-DNAmolecule systems

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ICIC Express Letters 2009年第3期3卷 645-650页

作者： Zhou, Shihua Zhang, Qiang Wei, Xiaopeng School of Mechanical Engineering Dalian University of Technology Dalian China Key Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian University Dalian China

Digital image scrambling is one of the most important methods of imageinformation hiding and camouflage. A new digital image scrambling algorithmbased on chaos in low intensity laser-DNA molecule systems is presented in thispaper for image encryption. Firstly, the chaotic sequence is generated by lowintensity laser-DNA molecule system,. Not only is the generated, chaoticsequence extremely sensitive for initial value, ergodic and aperiodic, but alsoit has higher security than the one generated by Logistic Mapping. Based, on thechaotic sequence(s), the image is confused by all pixels encryption and theimage ranks com, pound, encryption. Simulation experimental result shows thatthis method has good scrambling performance, security and robustness. ICIC International © 2009.

关键词： Cryptography

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Noether conserved quantities and Lie point symmetries of difference Lagrange-Maxwell equations and lattices

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Chinese Physics B 2009年第7期18卷 2634-2641页

作者：傅景礼聂宁明黄健飞 Jiménez Salvador 唐贻发 Vzquez Luis 赵维加 Institute of Mathematical Physics Zhejiang Sci-Tech University State Key Laboratory of Scientific and Engineering Computing ICMSECAcademy of Mathematics and Systems ScienceChinese Academy of Sciences Department of Mathematics Qingdao University Departamento de Matema'tica Aplicada TTII E.T.S.I.Telecomunicacio'nUniversidad Polit'ecnica de Madrid28040-MadridSpain Departamento de Matemática Aplicada Facultad de MatemáticasInstituto de Matemática Interdisciplinar(IMI)Universidad Complutense de Madrid28040-MadridSpain Departamento de Matemática Aplicada Facultad de InformáticaInstituto de Matemática Interdisciplinar(IMI)Universidad Complutense de Madrid28040-MadridSpain

This paper presents a method to find Noether-type conserved quantities and Lie point symmetries for discrete mechanico-electrical dynamical systems,which leave invuriant the set of solutions of the corresponding difference scheme. This approach makes it possible to devise techniques for solving the Lagrange Maxwell equations in differences which correspond to mechanico-electrical systems,by adapting existing differential *** particular,it obtains a new systematic method to determine both the one-parameter Lie groups and the discrete Noether conserved quantities of Lie point symmetries for mechanico-electrical *** an application,it obtains the Lie point symmetries and the conserved quantities for the difference equation of a model that represents a capacitor microphone.

关键词： Lagrange Maxwell equation Lie point symmetry discrete mechanico-electrical system conserved quantity

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A biometric method to secure telemedicine systems

A biometric method to secure telemedicine systems

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： G. H. Zhang Carmen C. Y. Poon Ye. Li Y. T. Zhang Institute of Computing Technology Chinese Academy and Sciences China Joint Research Centre of Biomedical Engineering Chinese University of Hong Kong New Territories Hong Kong China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy and Sciences China Key Laboratory of Biomedical Informatics and Health Engineering Chinese Academy and Sciences China

Security and privacy are among the most crucial issues for data transmission in telemedicine systems. This paper proposes a solution for securing wireless data transmission in telemedicine systems, i.e. within a body sensor network (BSN), between the BSN and server as well as between the server and professionals who have assess to the server. A unique feature of this solution is the generation of random keys by physiological data (i.e. a biometric approach) for securing communication at all 3 levels. In the performance analysis, inter-pulse interval of photoplethysmogram is used as an example to generate these biometric keys to protect wireless data transmission. The results of statistical analysis and computational complexity suggest that this type of key is random enough to make telemedicine systems resistant to attacks.

关键词： Biometrics Telemedicine Data communication Body sensor networks Network servers Communication system security Data security Data privacy Wireless sensor networks Performance analysis

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Symplectic-energy-first integrators of discrete mechanico-electrical dynamical systems

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Chinese Physics B 2008年第11期17卷 3942-3952页

作者：傅景礼陈本永唐贻发付昊 Institute of Mathematical Physics Zhejiang Sci-Tech University Faculty of Mechanical-Engineering & Automation Zhejiang Sci-Tech University State Key Laboratory of Scientific and Engineering Computing Chinese Academy of Sciences China Jingye Engineering Corporation Limited Shenzhen Brach

A discrete total variation calculus with variable time steps is presented for mechanico-electrical systems where there exist non-potential and dissipative forces. By using this discrete variation calculus, the symplectic-energy-first integrators for mechanico-electrical systems are derived. To do this, the time step adaptation is employed. The discrete variational principle and the Euler-Lagrange equation are derived for the systems. By using this discrete algorithm it is shown that mechanico-electrical systems are not symplectic and their energies are not conserved unless they are Lagrange mechanico-electrical systems. A practical example is presented to illustrate these results.

关键词： total variation symplectic-energy-momentum integrator mechanico-electrical system

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Preconditioners for higher order edge finite element discretizations of Maxwell's equations

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Science China Mathematics 2008年第8期51卷 1537-1548页

作者： ZHONG LiuQiang1,2,SHU Shi1,2,SUN DuDu3&TAN Lin4 1School of mathematical and Computational Sciences,Xiangtan University,Xiangtan 411105,China 2Hunan key laboratory for Computation and Simulation in Science and engineering,Xiangtan 411105,China 3Institute of Computational Mathematics and Scientific/engineering computing,Academy of Mathematicsand Systems Science,Graduate University of Chinese Academy of Sciences,Chinese Academy Sciences,P.O.Box 2719,Beijing 100190,China 4Department of Math-Physics,Nanhua University,Hengyang 421001,China 1. School of Mathematical and Computational Sciences Xiangtan University Xiangtan 411105 China 2. Hunan Key Laboratory for Computation and Simulation in Science and Engineering Xiangtan 411105 China 3. Institute of Computational Mathematics and Scientific/Engineering Computing Academy of Mathematics and Systems Science Graduate University of Chinese Academy of Sciences Chinese Academy Sciences P.O. Box 2719 Beijing 100190 China 4. Department of Math-Physics Nanhua University Hengyang 421001 China

In this paper,we are concerned with the fast solvers for higher order edge finite element discretizations of Maxwell's *** present the preconditioners for the first family and second family of higher order N′ed′elec element equations,*** combining the stable decompositions of two kinds of edge finite element spaces with the abstract theory of auxiliary space preconditioning,we prove that the corresponding condition numbers of our preconditioners are uniformly bounded on quasi-uniform *** also present some numerical experiments to demonstrate the theoretical results.

关键词： preconditioner higher order edge finite element stable decomposition

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New approximation operator of rough fuzzy sets

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Tongji Daxue Xuebao/Journal of Tongji University 2008年第6期36卷 827-831页

作者： Cheng, Yi Miao, Duoqian Liu, Yong Feng, Qinrong Key Laboratory of Embedded System and Service Computing Tongji University Shanghai 201804 China College of Mathematical Sciences Ocean University of China Qingdao 266071 China Department of Computer Science and Technology Tongji University Shanghai 201804 China College of Information Science and Engineering Ocean University of China Qingdao 266071 China

For Dubois rough fuzzy sets, the membership of the lower or upper approximations is defined as the elements memberships' infimum or supsmum in equivalent class. As a result of not considering the elements whose memberships are between the minimum and maximum, some useful information of these elements may be lost in the information processing. The paper presents a new operator of rough fuzzy sets that every element's membership in equivalent class is taken into account. Based on the new operator, algebra properties are put forward and rough fuzzy membership is defined. Moreover, the paper presents accurate degree, classified quality, dependence degree and attribute reduction algorithm. At last, an example proves that the algorithm is efficient.

关键词： Fuzzy sets

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Fractal dimension of Al(OH)3 particle and fractal simulation of boundary micro-topography

Fractal dimension of Al(OH)3 particle and fractal simulation...

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作者： Gai, Guosheng Li, Jinping Zheng, Zhoushun Hao, Xiangyang Yang, Yufen Key Laboratory of Advanced Materials Department of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Mathematical Science and Computational Technology Central South University Changsha 410083 China

Based on the fractal theories, using image processing software (IPS) to handle the scan electron microscope photos of particles, this paper gives a simple and applied method to pick up the boundary line's fractal dimension (FD) of particles' projective numerical images. Take example for Al(OH)3 material particles, adopting respectively relative Box-counting (BC) method and relative C-S method, we have calculated the boundary FD values of the research objects and compared FD with other quantitative token parameters, which shows FD is a sort of more refined quantitative token parameter. Finally, utilizing the method of Generator, we get some fractal figures which have nearly same FD values with Al(OH)3 material particles, utilizing that we can simulate and analyze the complexity of the boundary and surface micro-topography of Al(OH)3 material particles.

关键词： Aluminum compounds

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Solution to the Generalized Champagne Problem on simultaneous stabilization of linear systems

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Science in China(Series F) 2007年第5期50卷 719-731页

作者： GUAN Qiang WANG Long XIA BiCan YANG Lu YU WenSheng ZENG ZhenBing Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing 100080 China Center for Systems and Control College of Engineering Peking University Beijing 100871 China LMAM and School of Mathematical Sciences Peking University Beijing 100871 China Shanghai Institute of Theoretical Computing Software Engineering Institute East China Normal University Shanghai 200062 China National Key Laboratory of Intelligent Technology and Systems Tsinghua University Beijing 100084 China

The well-known Generalized Champagne Problem on simultaneous stabilization of linear systems is solved by using complex analysis and Blonders technique. We give a complete answer to the open problem proposed by Patel et al., which automatically includes the solution to the original Champagne Problem. Based on the recent development in automated inequality-type theorem proving, a new stabilizing controller design method is established. Our numerical examples significantly improve the relevant results in the literature.

关键词： linear systems stabilization simultaneous stabilization Champagne Problem Generalized Champagne Problem,complex analysis inequality-type theorem automated theorem proving

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A series of non-Noether conservative quantities and Mei symmetries of nonconservative systems

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Chinese Physics B 2007年第3期16卷 599-604页

作者：刘鸿基傅景礼唐贻发 Institute of Mathematical Physics Shangqiu Teacher's College Shangqiu 476000 China Department of Physics Zhejiang Sci-Tech University Hangzhou 310018 China State Key Laboratory of Scientific and Engineering Computing Chinese Academy of Sciences Beijing 100080 China Shanghai University Shanghai Institute of Applied Mathematics and Mechanics Shanghai 200072 China

In this paper Mei symmetry is introduced for a nonconservative system. The necessary and sufficient condition for a Mei symmetry to be also a Lie symmetry is derived. It is proved that the Mei symmetry leads to a non-Noether conservative quantity via a Lie symmetry, and deduces a Lutzky conservative quantity via a Lie point symmetry.

关键词： Mei symmetry non-Noether conservative quantity Lutzky conservative quantity nonconservative system

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