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| 1 | EXPERIMENTAL STUDY ON INCIPIENT MOTION OF SEDIMENT PARTICLES ON GENERALIZED SLOPING FLUVIAL BEDS显示文摘This paper presents an experimental investigation on incipient motion of non-cohesive uniform sediment under a steady-uniform stream flow on generalized sloping fluvial beds (combined lateral and stream-wise slope). The characteristic parameters affecting the incipient motion of sediment particles, identified based on the physical reasoning and dimensional analysis, are the threshold shear stress ratio (ratio of threshold shear stress for sloping bed to that for horizontal bed), lateral slope, stream-wise slope and angle of repose of sediment particles. Experiments were carried out in two ducts (closed-conduit flow) having section of semicircular invert with three types of sediments. In an open channel flow (laboratory flume study), the uniform flow is a difficult, if not impossible, proposition for a steeply sloping channel and is impossible to obtain in an adversely sloping channel. To avoid this problem, the tests were conducted with a closed-conduit flow. Equation of critical bed shear stress for the initial movement of sediment particles on generalized sloping beds was obtained using the experimental data. | Subhasish DEY Asst. Prof., Dept. of Civil Engrg., Indian Inst. of Tech., Kharagpur 721302, West Bengal, India. Fax: +91 3222 82254 | 2001 | International Journal of Sediment Research2001，16，3： | 8 |
| 2 | The Asymptotic Behavior of a Class of Second Order Differential Equation显示文摘In the paper the asympotic behavior of the solution of the following second order differential equation y+ q(t)f(y) =0 is investigated. Some results for asymptotic behavior of the nonoscillation solution are obtained. | FENG Zhao-sheng, WANC Xiao-hui, LI Jin-cheng ( Dept. of Math., Texas A&M University, College Station, TX 77843, USA Dept. of Stat., Texas A&M University, College Station, TX 77843, USA Basic Dep., Tianjin Vocational Tech. & Teaching College, Tianjin 3 | 2001 | Journal of Mathematical Research and Exposition2001，21，3： | 6 |
| 3 | MEASURING STRUCTURE COMPLEXITY OF UML CLASS DIAGRAMS显示文摘To provide system designer a valid measure to evaluate the structure complexityof class diagrams objectively, this letter first proposes a method to transform a class diagramsinto a weighted class dependence graph, then presents a structure complexity measure for classdiagrams based on entropy distance. | Zhou Yuming Xu Baowen (Dept. of Computer Science & Eng., Southeast Univ., Nanjing 210096) (State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072) (Jiangsu Key Lab. of Computer Info. Proc. Tech., Soochow Univ., Suzhou 215006) | 2003 | Journal of Electronics(China)2003，20，3： | 6 |
| 4 | Convergence for Imaginary Time Step evolution in the Fermi and Dirac seas显示文摘The convergence for the Imaginary Time Step (ITS) evolution with time step is investigated by performing the ITS evolution for the Schrdinger-like equation and the charge-conjugate Schrdinger-like equation deduced from Dirac equation for the single proton levels of 12C in both the Fermi and Dirac seas. For the guaranteed convergence of the ITS evolution to the 'exact' results,the time step should be smaller than a 'critical' time step Δtc for a given single-particle level. The 'critical' time step Δtc is more sensitive to the quantum numbers |κ| than to the energy of the single-particle level. For the single-particle levels with the same κ,their 'critical' time steps are in the same order. For the single-particle levels with similar energy,a relatively small (large) 'critical' time step for larger (smaller) |κ| is needed. These conclusions can be used in the future self-consistent calculation to optimize the evolution procedure. | LI FangQiong1,ZHANG Ying2 & MENG Jie2,3,4 1Guizhou University for Nationalities,Guiyang 550025,China 2State Key Lab Nucl. Phys. & Tech.,School of Physics,Peking University,Beijing 100871,China 3School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China 4Department of Physics,University of Stellenbosch,Stellenbosch,South Africa | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 4 |
| 5 | APPROXIMATION ANALYSES FOR FUZZY VALUED FUNCTIONS IN L_1(μ)-NORM BY REGULAR FUZZY NEURAL NETWORKS显示文摘By defining fuzzy valued simple functions and giving L1(μ) approximations of fuzzy valued integrably bounded functions by such simple functions, the paper analyses by L1(μ)-norm the approximation capability of four-layer feedforward regular fuzzy neural networks to the fuzzy valued integrably bounded function F : Rn → FcO(R). That is, if the transfer functionσ: R→R is non-polynomial and integrable function on each finite interval, F may be innorm approximated by fuzzy valued functions defined as to anydegree of accuracy. Finally some real examples demonstrate the conclusions. | Liu Puyin (Dept. of System Eng. and Math., National Univ. of Defence Tech., Changsha 410073) | 2000 | Journal of Electronics(China)2000，17，2： | 4 |
| 6 | Computational manufacturing显示文摘This paper presents a general framework for computational manufacturing. The methodology of computational manufacturing aims at integrating computational geometry, machining principle, sensor information fusion, optimization, computational intelligence and virtual prototyping to solve problems of the modeling, reasoning, control, planning and scheduling of manufacturing processes and systems. There are three typical problems in computational manufacturing, i.e., scheduling (time-domain), geometric reasoning (space-domain) and decision- making (interaction between time-domain and space-domain). Some theoretical fundamentals of computational manufacturing are also discussed. | DING Han and XIONG Youlun(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China 2. School of Mechanical Engineering & Science, Huazhong University of Sci. & Tech., Wuhan 430074, China) | 2002 | Progress in Natural Science:Materials International2002，12，9： | 4 |
| 7 | INFINITELY MANY SOLUTIONS OF DIRICHLET PROBLEM FOR p-MEAN CURVATURE OPERATOR显示文摘The existence of infinitely many solutions of the following Dirichlet problem for p-mean curvature operator:-div((1+|u| 2) p-22u)=f(x,u),\ x∈Ω, u∈W 1,p 0(Ω),is considered, where Ω is a bounded domain in R n(n>p>1) with smooth boundary Ω.Under some natural conditions together with some conditions weaker than (AR) condition,we prove that the above problem has infinitely many solutions by a symmetric version of the Mountain Pass Theorem if f(x,u)|u| p-2u→+∞ as u→∞. | Chen Zhihui Shen YaotianDept.of Appl.Math.,South China Univ. of Tech.,Guangzhou 510640,China. | 2003 | Applied Mathematics(A Journal of Chinese Universities)2003，18，2： | 3 |
| 8 | Numerical Analysis on Current Transport Characteristics in Single Layer Organic Electroluminescent Devices显示文摘A new model to describe I-V characteristics of organic light emitting devices (OLEDs) is developed based on experimental results. The dependence of I-V characteristics on energy barrier, trap density and carrier mobility is analyzed. The result shows that this model combines the Fowler Nordheim tunnel theory and the trap charge limited current theory with exponential trap distribution (TCL), and it describes the current transport characteristics of OLEDs more comprehensively. The I-V characteristics follow Fowler Nordheim theory when the energy barrier is high, the trap density is small and the carrier mobility is large.In other cases they follow the TCL theory. | PENG Ying quan 1, GAO Zhao yang 1, HE Xi yuan 1, ZHANG Xu 2 (1.School of Phys. Sci. and Tech., Lanzhou University, Lanzhou 730000, CHN 2. Dept. of Phys., Gansu Education University, Lanzhou 730030, CHN) | 2002 | Semiconductor Photonics and Technology2002，8，4： | 3 |
| 9 | Properties,Microstructures and Precipitate Morphology of Hot-rolled Interstital-Free(IF)Steel Sheets显示文摘In order to simplify production process and to decrease production cost of thicker cold-rolled iF steel sheets for deep drawing applications, a new hot-rolled IF steel sheet is developed through hot-rolling in or region. In this paper, properties, microstructures and precipitate morphology of hot-rolled iF steel sheets are described.. | Zuocheng WANG and Fang WANG Dept. of Mater. Sci. & Tech., Shandong Unly. of Tech., Jinan 250061, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 3 |
| 10 | A SKELETONIZATION ALGORITHM BASED ON EUCLIDEAN DISTANCE MAPS AND MORPHOLOGICAL OPERATORS显示文摘In this letter a new skeletonization algorithm is proposed. It combines techniques of fast construction of Euclidean Distance Maps(EDMs), ridge extraction, Hit-or-Miss Transformation(HMT) of structuring elements and the set operators. It first produces the EDM image with no more than 4 passes through an image of any kinds, and then the ridge image is extracted by applying a turn-on scheme and performing a rain-fall elimination to accelerate the processing. The one-pixel wide skeleton is finally acquired by carrying out the HMTs of two structure elements and the SUBTRACT and OR operations. Experimental results obtained by practical applications are also presented. | Ma Lihong Yu Yinglin(Dept. of Electron. Eng. and Comm., South China Univ. of Tech. Guangzhou, 510641)Zhang Yu(Research Inst. of Computer Application, South China Univ. of Tech. Guangzhou, 510641) | 2001 | Journal of Electronics(China)2001，18，3： | 3 |
| 11 | ON THE TESTING FOR ALPHA-STABLE DISTRIBUTIONS OF ETHERNET NETWORK TRAFFIC显示文摘The modeling of network traffic is important for the design and application of networks, but little is known as to the characteristics of distribution of packets in network traffic. In this letter the distribution of packets in network traffic is explored. | Ge Xiaohu Zhu Guanxi Zhu Yaoting (Electron. & Info. Eng. Dept., Huazhong Univ. of Sci. & Tech., Wuhan 430074) | 2003 | Journal of Electronics(China)2003，20，4： | 3 |
| 12 | APPROXIMATION OF GENERALIZED BI-AXIALLY SYMMETRIC POTENTIALS WITH FAST RATES OF GROWTH显示文摘APPROXIMATIONOFGENERALIZEDBI-AXIALLYSYMMETRICPOTENTIALSWITHFASTRATESOFGROWTH￥H.S.Kasana(Dept.ofMath.,BirlaIust.ofTech.&Sci.,P... | H.S.Kasana(Dept.of Math., Birla Iust.of Tech. & Sci.,Pilani-333 031(Rajasthan), India.D.Kumar)(Dept.of Math., D. S. M.Degree College, Kanth-244 501 (Moradabad),U.P.,India.) | 1995 | Acta Mathematica Scientia1995，15，4： | 3 |
| 13 | FINITE ELEMENT SIMULATION AND OPTIMIZATION OF MULTISTAGE WARM/HOT FORMING FOR OUTER RACE显示文摘A multistage warm/hot forming is simulated for the cross grove outer race of constant velocity joint, using athermo-mechanical coupled rigid viscoplastic finite element method, and specially some problem for process develop-ment and die design are analyzed. A forming test shows that computed results have good agreement with experimentalresults. Above obtained results can be applied to development of multistage warm/hot forming process and die designfor outer race. | Wang Huajun Xia Juchen Hu GuoanState Key Laboratory of Plastic Forming Simulation and Die & Mold Tech., Huazhong University of Science and Technology, Wuhan 430074, China | 2002 | Chinese Journal of Mechanical Engineering2002，15，4： | 2 |
| 14 | Topological naming mechanism in feature-based modelling显示文摘Topologicalnamingmechanisminfeature_basedmodelingJunjunWu,TongyangWang,XinfangZhangandJizhouComputerAidedDesignCenter,HuaZhon... | Junjun Wu, Tongyang Wang, Xinfang Zhang and Ji zhou Computer Aided Design Center, HuaZhong Univ.of Sci.& Tech. Wu Han, China, 430074. (e_amil:rm039@mecad.hust.edu.cn) | 1997 | Computer Aided Drafting,Design and Manufacturing1997，7，2： | 2 |
| 15 | TWO CLASSES OF SYMMETRIC SIGN PATTERNS THAT REQUIRE UNIQUE INERTIA显示文摘A sign pattern is a matrix whose entries are from the set {+,-,0}. Associated with each sign pattern A of order n is a qualitative class of A,defined by Q(A). For a symmetric sign pattern A of order n,the inertia of A is a set i(A)={i(B)=(i +(B),i -(B),i 0(B))|B=B T∈ Q(A)},where i +(B) (respectively,i -(B),i 0(B)) denotes the number of positive (respectively,negative,zero) eigenvalues. That the symmetric sign pattern A requires unique intertia means i(B 1)=i(B 2) for all real symmetric matrices B 1,B 2∈Q(A).The purpose of this paper is to characterize double star and cycle sign patterns that require unique inertia. Further,their unique inertia is also obtained. | Shao YanlingDept. of Appl. Math.,Beijing Institute of Tech.,Beijing 100081,China. | 2003 | Applied Mathematics(A Journal of Chinese Universities)2003，18，2： | 2 |
| 16 | A ROBUST ADAPTIVE VIDEO ENCODER BASED ON HUMAN VISUAL MODEL显示文摘A Robust Adaptive Video Encoder (RAVE) based on human visual model is proposed. The encoder combines the best features of Fine Granularity Scalable (FGS) coding, framedropping coding, video redundancy coding, and human visual model. According to packet loss and available bandwidth of the network, the encoder adjust the output bit rate by jointly adapting quantization step-size instructed by human visual model, rate shaping, and periodically inserting key frame. The proposed encoder is implemented based on MPEG-4 encoder and is compared with the case of a conventional FGS algorithm. It is shown that RAVE is a very efficient robust video encoder that provides improved visual quality for the receiver and consumes equal or less network resource. Results are confirmed by subjective tests and simulation tests. | Yin Hao Zhang Jiangshan Zhu Yaoting Zhu Guangxi (Dept. of Electronics & Info. Eng., Huazhong University of Sci. & Tech., Wuhan 430074) | 2003 | Journal of Electronics(China)2003，20，2： | 2 |
| 17 | EXISTENCE OF PERIODIC SOLUTIONS TO A KIND OF HIGHER ORDER FUNCTIONAL DIFFERENTIAL EQUATION WITH TWO DEVIATING ARGUMENTS显示文摘In this paper, by the theory of Fourier series, Bernoulli number theory and continu-ation theorem of coincidence degree theory, we study a kind of higher order functional differential equation with two deviating arguments. Some new results on the existence of periodic solutions are obtained. | Li Xiaojing (College of Math. and Phy., Jiangsu Teachers University of Tech., Changzhou 213015, Jiangsu) Zhang Zhirong, Lu Shiping (Dept. of Math., Anhui Normal University, Wuhu 241000, Anhui) | 2008 | Annals of Differential Equations2008，24，3： | 2 |
| 18 | An Early Stage Faulting Along the Altun Mountain Range——Microstructural Evidences显示文摘Structural, microstructural analysis is done on the Altun fault zo ne and fault rocks. The major characteristics of faulting are summarized. Micros tructural observation reveals a complicated evolution of the fault zone. Much at tention is paid to the microstructural observation and dynamic analysis of fault ing. The occurrence of phengite grains suggest abnormally high pressure conditio ns during ductile deformation and metamorphism, while the occurrence of muscovit e-chlorite mineral assemblage suggest a low temperature and low pressure condit i on. Micro-component analysis on the inter-grown muscovite and chlorite grains gives similar information. It is concluded that the first deformation along the Altun fault zone is a type of ductile shearing, forming mylonites and mylonitic rocks along the fault zone. A post-Jurassic deformation is primarily suggested by the involvement of the l atest tectonic units (Jurassic) in the ductile deformation.The early tectonic ev ent involves deformation and metamorphism under conditions in the upper crust, w ith T-P conditions varying to a large extent (T-270℃ ~350℃; P-0.005GPa~0. 43GPa), which may be attributed to the extra tectonic stresses. | Liu Junlai, Pan Hongxun, Ye Huiwen, Ge Xiaohong and Liu Yongjiang (Changchun Univ. Sci & Tech., 130026, Changchun, China) | 1999 | Global Geology1999，4，2： | 2 |
| 19 | STUDY OF CAPILLARY ELECTROPHORESIS ON MICROCHIP BASED ON MEMS显示文摘Using a standard photolithographical procedure, chemical wet etching and thermal diffusion bonding technology, a chemical analysis device for Capillary Electrophoresis(CE) has been microfabricated on a planar glass substrate with a cross-column geometry. The channels on the microchip substrate are about 50μm deep and 150μm wide. By employing amino acids derived from 2,4-DiNitroFluoroBenzen (DNFB) on CE chip channels, the sample manipulating system is studied based on the principle of electrodynamics. | Wang Ming Li Wei Han Jinghong Cui Dafu (State Key Lab. of Transducer Tech., Inst. of Electron., Chinese Academy of Sci., Beijing 100080) | 2002 | Journal of Electronics(China)2002，19，4： | 1 |
| 20 | ANALYSIS OF INTERNALLY GENERATED NOISE OF BIOELECTRIC AMPLIFIERS显示文摘This paper deals with internally generated noise of bioelectric amplifiers that are usually used for processing of bioelectric events. The main purpose of this paper is to present a procedure for analysis of the effects of internal noise generated by the active circuits and to evaluate the output noise of the author's new designed bioelectric amplifier that caused by internal effects to the amplifier circuit itself in order to compare it with the noise generated by conventional amplifiers. The obtained analysis results of internally generated noise showed that the total output noise of bioelectric active circuits does not increase when some of their resistors have a larger value. This behavior is caused by the different transfer functions for the signal and the respective noise sources associated with these resistors. Moreover, the new designed bioelectric amplifier has an output noise less than that for conventional amplifiers. The obtained analysis results were also experimentally verified and the final conclusions were drawn. | Mashhour Mustafa Bani Amer(Dept. of Biomedical Eng., Faculty of Eng., Jordan Univ. of Sci. and Tech., P.O.Box 3030, Irbid 22110, Jordan) | 2003 | Journal of Electronics(China)2003，20，1： | 1 |
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