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MATHEMATICAL SIMULATION OF INTERACTIVE PHYSICAL PROCESSES IN HIGH TEMPERATURE ELECTROCHEMICAL DEVICES

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中国有色金属学会会刊：英文版 1993年第4期3卷 84-87页

作者： Chtcherbinin,S The university,Ufa,Russia

A mathematical analogue of interactive mass transfer in some electrochemical processes hasbeen considered.A programme has been developed which calculates thermal and electrical phe-nomena in high temperature electroch... 详细信息

关键词： mathematical analogue mass transfer electrochemical process

JACOBI SPECTRAL APPROXIMATIONS TO DIFFERENTIALEQUATIONS ON THE HALF LINE

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Journal of Computational Mathematics 2000年第1期18卷 95-112页

作者： Ben-yu Guo(Department of Mathematics, Shanghai Normal university, Shanghai 200234, China)(COM2MAC, Pohang university of Science and Technology, Pohang, Korea) 上海师范大学上海 200234

Presents a study which investigated some Jacobi approximations which are used for numerical solutions of differential equations on the half line. Application of the approximations to problems on unbounded domains; Alg... 详细信息

关键词： Jacobi spectral approximations differential equations on the half line stability and convergence

Time lag between reduction of sediment supply and coastal erosion

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International Journal of Sediment Research 2011年第1期26卷 27-35页

作者： HUANG Guangwei~1 university of Tokyo,Japan, Dr. university of Tokyo Japan

The disruption of sediment supply from river to coast by dam development has been a topic of global *** Japan,among the top 30 dams in terms of height,14 dams were constructed prior to 1970 and another 6 dams before ***,the coastline erosion did not surface up as a grievous problem until the *** to the River Bureau of Japan,the overall erosion rate along the coastline of Japan was 0.72×10~6 m~2/yr prior to 1980,but sharply increased to 1.6×10~6 m~2/yr since ***,there was a time lag between the disruption of sediment supply by dam and beach *** paper presents a case study on what may have delayed the response of beach to the effect of dam construction.

关键词： Erosion Sediment supply Dam Sand mining Time lag

REVERSE ENGINEERING BASED ON COMPUTER VISION FOR FREE FORM SURFACE

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Chinese Journal of Mechanical Engineering 1999年第4期12卷 241-246页

作者： Lai Xinmin Lin Zhongqin School of Mechanical Engineering, Shanghai Jiaotong university Huang Tian Zhang Dawei Zeng Ziping Tianjin university Shanghai Jiaotong Univ Shanghai China

The key issues such as vision sensor, sampling planning are studied for reverse engineering. For the developed sensor, the low sensitivity to the incident angle and the high linearity between the output and the input are carried out. During digitizing, the adaptive sampling planning method based on the curvature of surface and the slope of tangent line of measured point is proposed. After integrating the vision sensor, CNC milling and relevant software, the reverse engineering system based on computer vision is developed. The experiment shows that this system is reliable and efficient.

关键词： Reverse engineering Computer vision Sampling planning Free form surface

Microstructure and Fractural Morphology of Cobalt-based Alloy Laser Cladding

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Journal of Wuhan university of Technology(Materials Science) 2003年第3期18卷 30-32页

作者：陈浩 School of Materials Science and Engineering Wuhan Univercity of Technology

The solidification features,micro segregation,and fracture characteristics of cobalt based alloy on the substrate of 20CrMo steel by laser cladding were studied by using electron *** results show that the fine columnar grains and cellular dendrite grains are obtained which are perpendicular to the coating/substrate interface;the primary arms are straight while the side branches are degenerated;the microstructure consists of primary face centered cubic (fcc) Co dendrites and a network of Cr enriched eutectic M23C6 (M=Cr,W,Fe) carbides;the micro segregation is severe for the rapid heating and cooling of laser cladding;the typical brittle intergranular fracture occurs in cobalt based laser cladding layer.

关键词： laser cladding Cobalt based alloy solidification microstructure micro segregation fracture

On the group with the same orders of Sylow nor-malizers as the finite projective special unitary group

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Science China Mathematics 2004年第6期47卷 801-811页

作者： Bl JianxingDepartment of Mathematics, Liaoning university, Shenyang 110036, China Department of Mathematics Liaoning University Shenyang China

In this paper we prove that a finite group G is isomorphic to the finite projective special unitary group U n (q) if and only if they have the same order of Sylow r-normalizer for every prime r.

关键词： unitary group Sylow subgroup normalizer

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Science China Mathematics 2004年第5期47卷 659-674页

作者： SHI Peihu & WANG MingxinDepartment of Mathematics, Southeast university, Nanjing 210018, China Department of Mathematics, Xuzhou Normal university, Xuzhou 221116, China Department of Mathematics Southeast University Nanjing China Department of Mathematics Xuzhou Normal University Xuzhou China

This paper is devoted to study the classification of self-similar solutions to the quasilinear parabolic equations with nonlinear gradient termsu t = Δ(u m) - uq∣Δu∣ p withm ≥ 1,p,q > 0 andp +q >m. Form = 1, it is shown that the very singular self-similar solution exists if and only ifnq + (n +1)p 1, it is shown that very singular self-similar solutions exist if and only if 1

关键词： quasilinear parabolic equations, self-similar solutions, very singular solution, classification.

|m| Partial wave treatment for two-dimensional Coulomb-scattering and Regge pole

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Science China(Physics,Mechanics & Astronomy) 2004年第6期47卷 676-684页

作者： WANG Jing & ZENG Jinyan Department of Physics,Tsinghua university,Beijing 100084,China School of Physics,Peking university,Beijing 100871,China Department of Physics Tsinghua University Beijing 100084 China School of Physics Peking University Beijing 100871 China

The symmetry and |m| partial-wave analysis for two-dimensional (2D) Coulomb-scattering is investigated. As a function of energyE, the |m| partial-wave scattering amplitudef |m|(θ) is analytically continuated to the, negativeE (complexk) plane, and it is found that the bound state energy eigenvalues (E<0) are just located at the poles off |m|(θ) on the positive imaginaryk axis as is expected. In addition, as a function of |m|,f |m|(θ) is analytically continuated to the complex |m| plane, the bound state energy eigenvalues are just located at the poles off |m|(θ) on the positive real |m| axis.

关键词： two-dimensional Coulomb scattering, |m| partial-wave, Regge pole.

Uniqueness and local stability for the inverse scattering problem of determining the cavity

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Science China Mathematics 2005年第8期48卷 1113-1123页

作者： FENG Lixin & MA Fuming LMAM, School of Mathematical Sciences, Peking university, Beijing 100871, China School of Mathematical Sciences, Heilongjiang university, Harbin 150080, China School of Mathematical Sciences, Jilin university, Changchun 130012, China LMAM School of Mathematical Sciences Peking University Beijing China School of Mathematical Sciences Heilongjiang University Harbin China School of Mathematical Sciences Jilin University Changchun China

Considering a time-harmonic electromagnetic plane wave incident on an arbitrarily shaped open cavity embedded in infinite ground plane, the physical process is modelled by Maxwell's equations. We investigate the inverse problem of determining the shape of the open cavity from the information of the measured scattered field. Results on the uniqueness and the local stability of the inverse problem in the 2-dimensional TM (transverse magnetic) polarization are proved in this paper.

关键词： uniqueness, stability, Maxwell's equations, inverse scattering problem.