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A Method for Hierarchical Subband HDTV Splitting

Journal of Systems Engineering and electronics 1995年第1期6卷 25-45页

作者： Feng Fan(university of electronic science and technology of china, chengdu 610054, china)Wang Xincheng(Tsinghua university, Beijing 100084, china)Ignace Bruyland(university of Ghent, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium) university of electronic science and technology of china Chengdu 610054 China Tsinghua university Beijing 100084 China university of Ghent Sint-Pietersnieuwstraat 41 B-9000 Gent Belgium

In this paper, an investigation is made on compatibility of the video formats TV (6.5/50/2:1/4:3), EDTV (6.5/50/1:1/16.9), HDTVint (1250/50/2:1/16.9) and HDTVpro(1250/50/2:1/16.9) in three-dimensional subband coding. A hierarchical method is proposed leading to a more reasonable joint solution for the issues of digital transmission evolution and interlace-to-progressive scanning conversion ill the frame work of bit rate compression. Conventional HDTVint with the diamond shaped spectrum is proposed to be replaced by a kind of 'switching'HDTVin signal which consists of three components and motion detection bits (MDB). The first component and the MDB represent TV. The first plus the second component and the MDB represent *** is splitted into switching HDTVint and extra component. The switching threshold and the length of temporal filter banks are discussed. Rearranging the pixels in subbands is recommended. Based on the proposed method, the transmission system can evolve through four steps: TV, EDTV, HDTVint and HDTVpro Results of bit rate compression are also presented. TV, EDTV, HDTVint and HDTVpro are compressed to approximately 40, 80, 128 and 256.Mbit/s respectively. Interlace scanning has drawbacks such as line flicker and line crawling as the eye follows the line structure in the picture. Progressive version switching TV and HDTVint can be reconstructed using one frame memory without the problems of handling temporal-vertical diamond shaped spectra of conventional TV and HDTVint based on a one-frame memory algorithm in the receiver.

关键词： video formats TV three-dimensional subband coding hierarchical subband HDTV splitting

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ANALYSIS OF THE TRANSMISSION PROPERTIES OF TAPERED MUTLICONDUCTOR INTERCONNECTING BUSES IN HIGH-SPEED INTEGRATED CIRCUITS

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Journal of electronics(china) 1994年第1期11卷 22-27页

作者：王秉中 university of electronic science and technology of china Chengdu 610054

Analysis approach and formulas for the transmission properties of uniform multicon-ductor interconnecting buses in high-speed integrated circuits are presented in this article. And further, by using a network approach, a tapered bus system can be analyzed as a set of cascaded uniform buses with slightly different strip widths. Obtained results are in good agreement with the experimental data.

关键词： High speed integrated circuit Interconnection Transmission lines Network Scattering parameter

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SOME ELECTROSTATIC PROBLEMS AND THEIR APPLICATIONS

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science china Mathematics 1989年第6期32卷 736-745页

作者：林为干 university of electronic science and technology of china Chengdu

Using the method for the classical electrostatic problems, some difficuties in modern phys-ics and engineering canbe overcome. By means of the concept of equipotential and the relatedconcept of perturbation of uniform field, the maximum field strength can be calculated at thetip of some dielectric or conducting bodies resting on the surface of a charged conductor. In2-dimensional cases of small semi-elliptical cylinder of dielectricor conducting material andcases of small part-cylindrical cylinder on a charged conductor, the concentration of chargescan be investigated to study gas ionization. These results have so far not yet been pub-lished in literature.

关键词： charge density at a conducting surface Gaussian theorem equipotential surface point discharge.

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Relaxed delay-dependent exponential stability condition for a class of neural networks with polytopic uncertainties and distributed delays

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控制理论与应用（英文版） 2011年第2期9卷 302-306页

作者： Jianwei XIA 1,2,Hongbin ZHANG 3 1.School of Automation,Southeast university,Nanjing Jiangsu 210096.china 2.School of Mathematics science,Liaocheng university,Liaocheng Shandong 252000,china 3.School of electronic Engineering,university of electronic science and technology,chengdu Sichuan 610054,china School of Automation Southeast University Nanjing Jiangsu China School of Mathematics science Liaocheng University Liaocheng Shandong China School of electronic Engineering University of Electronic Science and Technology Chengdu Sichuan China

The global robust exponential stability of a class of neural networks with polytopic uncertainties and distributed delays is investigated in this ***-dependent Lypaunov-Krasovskii functionals and free-weighting matrices are employed to obtain sufficient condition that guarantee the robust global exponential stability of the equilibrium point of the considered neural *** derived sufficient condition is proposed in terms of a set of relaxed linear matrix inequalities (LMIs),which can be checked easily by recently developed algorithms solving LMIs.A numerical example is given to demonstrate the effectiveness of the proposed criteria.

关键词： Neural networks Polytopic uncertainties Distributed delays Delay-dependent Global robust exponential stability

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THE GROWTH THEOREM FOR STARLIKE MAPPINGS ON BOUNDED STARLIKE CIRCULAR DOMAINS

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Chinese Annals of Mathematics,Series B 1998年第4期19卷 401-408页

作者： LIU TAISHUN (Department of Mathematics, university of science and technology of china, Hefei 230026. china)REN GUANGBIN (Department of Mathematics, university of science and technology of china, Hefei 230026. china) Univ Sci & Technol china Dept Math Anhua 230026 Peoples R China

The authors obtain the growth and covering theorem for the class of normalized biholomorphic starlike mappings on bounded starlike circular *** type of domain discussed is rather general, since the domain must be starlike if there exists a normalized biholomorphic starlike mapping on it. In the unit disc, it is just the famous growth and covering theorem for univalent *** theorem successfully realizes the initial idea of H. Cartan about how to extend geometric function theory from one variable to several complex variables.

关键词： Starlike mappings Growth theorem Starlike circular domains

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IMAGING OF EEG BY SPHERICAL HARMONIC ANALYSIS

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Journal of electronics(china) 1996年第1期13卷 82-88页

作者： Yao Dezhong (university of electronic science and technology of china, chengdu 610054)

A new three dimensional imaging method for electroencephalogram(EEG) is suggested. It consists of the solution of an inward spherical harmonic continuation. The principle of the new method is introduced in Section II, then a few numerical simulation tests are shown and the feasibility of the new method is confirmed by the simulation results.

关键词： Electroencephalogram(EEG) Spherical harmonic analysis Three-dimensional imaging

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THE BLOCH CONSTANT OF LOCALLY BIHOLOMORPHIC MAPPINGS ON BOUNDED SYMMETRIC DOMAINS

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Chinese Annals of Mathematics,Series B 1996年第3期17卷 271-278页

作者： GONG SHENG(Department of Mathematics, university of science and technology of china, Hefei 230026. china) UNIV SCI & TECHNOL china DEPT MATHHEFEI 230026PEOPLES R CHINA

The estimations of the bounds of the Bloch constant of locally biholomorphic mappingson irreducible bounded symmetric domains are given. When the domain is a unit circle, theestimation of the lower bounds is just the ... 详细信息

关键词： Bounded symmetric domain Bloch mapping Bloch constant,Locally biholomorphic mapping

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ANALYSIS OF BACKSCATTERING FROM WING AND FUSELAGE JOINTS

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Chinese Journal of Aeronautics 1993年第3期 205-210页

作者： Ruan Ying-zheng,Tian Jun (university of electronic science and technology of china, Chendu,china,{6.)

The dihedral reflector with wing and fuselage joint is a very strong electromagneticscattering source in a wide angular region. The prediction of the electromagnetic scatteringand radar cross section from this construction, however, is a complicated theoretical problem,because one of the dihedral surfaces is curved. In this paper, the problem is analysedand calculated by the method of complex ray expansion combined with geometrical theoryof diffraction, dealing with the specular multi-reflections and the edge diffractionsrespectively. The influence of the geometrical parameters of the construction, such as theangle between wing and fuselage and the radius of airframe, on the radar cross section oftarget is evaluated numerically. The obtained results show that the presented method is aneffective approach to the radar cross section prediction, and the scattering contributionfrom the wing-fuselage dihedral can be reduced substantially by the computeroptimization of geometrical construction.

关键词： RCS ANALYSIS OF BACKSCATTERING FROM WING AND FUSELAGE JOINTS

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AN INVESTIGATION ON ASM TURBULENCE MODEL IN PREDICTIING NONISOTROPIC TURBULENT FLOWS

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Journal of Hydrodynamics 1991年第2期3卷 81-87页

作者： Yang Yong-quan Wu Chi-gong, chengdu university of science and technology, chengdu Sichuar 6.006., P.R.china chengdu Univ of science and Technology Chengdu China

Non-isotropy is evident for flows with large streamline curvature. Algebraic stress model can fairly simulate non-isotropy of turbulence. Some flow situations were investigated with a well developed ASM model. The calcu- lated results show that the distributions of Reynolds stresses in different directions are obviously different. The non-isotropy of the flow is evident. The effect of streamline curvature on the flow feature of submerged water jet restricted by solid boundaries were studied, and its application in the design of energy dissipators of free trajectory jet type was disscused.

关键词： ASM AN INVESTIGATION ON ASM TURBULENCE MODEL IN PREDICTIING NONISOTROPIC TURBULENT FLOWS

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Some Reliability Problems Arising in the M^x/G(M/G)/1 Repairable Queueing System with Single Delay Vacation

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Journal of Systems science and Systems Engineering 2001年第3期13卷 306-314页

作者： TANG Ying-hui Department of Applied Math., university of electronics science & technology of china, chengdu 610054, china Department of Applied Math. University of Electronics Science & Technology of China Chengdu 610054 China

On the basis of Ref.\, the M x/G(M/G)/1 repairable queueing system with single delay vacation is discussed again. The following reliability problems of the service station are studied: (a) The probability that it fails at time t , i.e. its unavailability; (b) The expected failure number during the time interval (0,t\];; (c) The expected failure number during the ″server busy period″; (d) The expected downtime during the time interval (0,t\]. Some reliability results of the service station are obtained. These results would be interest to reliability analysts.

关键词： repairable vacation service station unavailability failure number downtime

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