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MODELLING AND NUMERICAL SOLUTIONS OF A GAUGE PERIODIC TIME DEPENDENT GINZBURG-LANDAU MODEL FOR TYPE-Ⅱ SUPERCONDUCTORS

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Journal of Computational Mathematics 1997年第4期15卷 365-384页

作者： Zhi-ming Chen (institute of Mathematics, Chinese Academy of Sciences, Beijing, china) 中科院数学所北京

In this paper we seek the solutions of the time dependent Ginzburg-Landau model for type-Ⅱ superconductors such that the associated physical observables are spatially periodic with respect to some lattice whose basic lattice cell is not necessarily rectangular. After appropriately foring the gange, the model can be formulated as a system of nonlinear parabolic partial differential equations with quasi-periodic boundary conditions. We first give some results concerning the existence, uniqueness and regularity of solutions and then we propose a semiimplicit finite element scheme solving the system of nonlinear partial dmerential equations and show the optimal error estimates both in the L2 and energy *** also report on some numerical results at the end of the paper.

关键词： Math QT MODELLING AND NUMERICAL SOLUTIONS OF A GAUGE PERIODIC TIME DEPENDENT GINZBURG-LANDAU MODEL FOR TYPE SUPERCONDUCTORS

An integrated turbocharger design approach to improve engine performance

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Science china(Technological Sciences) 2010年第1期53卷 69-74页

作者： ZHANG YangJun1,CHEN Tao1,ZHUGE WeiLin1,ZHANG ShuYong2 & XU JianZhong3.1 State Key Laboratory of Automotive Safety and energy,Tsinghua University,Beijing 100084,china 2 National Key Laboratory of Diesel Engine Turbocharging Technology,P.O.B.22,Datong 03.03.,china 3.{3. of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,china 1. State Key Laboratory of Automotive Safety and energy Tsinghua University Beijing 100084 China2. National Key Laboratory of Diesel Engine Turbocharging Technology P.O.B. 22 Datong 037036 China3. Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China

Turbocharging technology is today considered as a promising way for internal combustion engine energy saving and CO2 *** design is a major challenge for turbocharged engine performance *** turbocharger designer must draw upon the information of engine operation conditions,and an appropriate link between the engine requirements and design features must be carefully developed to generate the most suitable design *** objective of this research is to develop a turbocharger design approach for better turbocharger matching to an internal combustion *** development of the approach is based on the concept of turbocharger design and interaction links between engine cycle requirements and design parameter values.A turbocharger through flow model is then used to generate the design *** integrated method has been applied with success to a gasoline engine turbocharger assembly.

关键词： turbocharger design internal combustion engine integrated method through flow model

OBSERVATION ON DEFECTS IN POLYCRYSTALLINE SILICON THIN FILMS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 295-299页

作者： Y.F. Hu1), H. Shen2), L. Wang3., Z.C. Liang3., Z.Y. Liu1) and L.S. Wen1) 1) College of Mechanical Engineering, South china University of Technology, Guan gzhou 510640, china 2) The School of Physics and Engineering, Zhongshan University, Guangzhou 510275 , china 3. Guangzhou {3. of energy Conversion, The Chinese Academy of Sciences, G uangzhou 510640, china College of Mechanical Engineering South China University of Technology Guangzhou 510640China The School of Physics and Engineering Zhongshan University Guangzhou 510275China Guangzhou institute of energy Conversion The Chinese Academy of Sciences Guangzhou 510640China

Polycrystalline silicon thin films were prepared by RTCVD (rapid thermal chemica l vapor deposition) method on several substrates such as SSP (silicon sheet from powder) ribbon, poly-Si wafer and mono-Si wafer. Intra-granular defects such as stacking faults, twins and microstructure defects were investigated on thin fil ms by scan electron microscopy (SEM) technique.

关键词： poly-Si thin film intra-granular defects surface cross-section

Study of D^0-D^0 mixing at a giga-Z linear collider

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Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 1953-1956页

作者： LI HaiBo 1 & YANG MaoZhi 2 1 institute of High energy Physics,P.O.Box 918,Beijing 100049,china 2 School of Physics,Nankai University,Tianjin 3.0071,china institute of High energy Physics Beijing China School of Physics Nankai University Tianjin China

The possibility of studying D 0-D 0 mixing at a giga-Z linear collider "Z factory" where 10 9 hadronic Z 0 decays can be accumulated is *** discuss the sensitivity for the measurements of neutral D mixing *** results are compared to those attainable at B *** find that the typical decay length of the neutral D mesons at Z factory is about 10 times larger than that at B *** addition,the resolution of the vertex detector of a giga-Z factory is 2-3.times better than that of B *** proper time resolution at Z factory is about 20-3. times better than that at B *** the determination of the mixing parameters at a giga-Z factory is more precise.

关键词： Z factory D0 mesons mixing B factory

Fast Reactor Technology Development in china Status and Prospects

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工程科学（英文版） 2007年第4期5卷 76-83页

作者： Xu Mi(china institute of atomic {3.,P.O.BOX 275(3.)Beijing 102.13.china)

china has decided to speed-up the nuclear power *** is programmed that the nuclear power capacity will reach 40 GWe in 2020 and envisaged 60 GWe and 240 GWe in 203. and 2050 *** basic strategy of PWR-FBR matched development with Fast reactor metal fuel closed cycle for a sustainable and quick increasing nuclear energy supply is *** strategy also decided is that the partitioning and transmutation of MA will be realized using fast burner and *** fast reactor engineering development will be divided into three steps:china Experimental Fast Reactor(CEFR 65 MWt/20 MWe),china Prototype/Demonstration Fast Reactor(CPFR/CDFR ≥ 1 500 MWt/600 MWe)and china Demonstration Fast Breeder Reactor(CDFBR 1 000～1 500 MWe).The CEFR is under installation and pre-operation testing with it's first criticality planned in *** design study of CPFR is just started in *** a discussion for the second step is under way to faster the fast reactor development by a larger than 600 MWe CPFR and as a role of CDFR.

关键词： fast reactor development strategy breeder burner china experimental fast reactor

Evaluating the effect of dislocation on the photovoltaic performance of metamorphic tandem solar cells

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中国科学：技术科学英文版 2010年第9期53卷 2569-2574页

作者： ZHANG Han1,CHEN NuoFu2,3.WANG Yu1,ZHANG XingWang1,YIN ZhiGang1,SHI HuiWei1,WANG YanSuo1,HUANG TianMao1,BAI YiMing2 & FU Zhen11 Key Laboratory of Semiconductor Materials Science,institute of Semiconductors,Chinese Academy of Sciences,P.O.Box 912,Beijing 100083.china 2 School of Renewable energy Engineering,North china Electric Power University,Beijing 102206,china 3.State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 3.0027,china 1. Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Sciences P.O. Box 912 Beijing 100083 China2. School of Renewable Energy Engineering North China Electric Power University Beijing 102206 China3. State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 China

The photovoltaic conversion efficiency for monolithic GaInP/GaInAs/Ge triple-junction cell with various bandgap combination (3.0 suns,AM1.5d) was theoretically *** impressive improvement on conversion efficiency was observed for a bandgap combination of 1.708,1.194,and 0.67 eV.A theoretical investigation was carried out on the effect of dislocation on the metamorphic structure’s efficiency by regarding dislocation as minority-carrier recombination *** results showed that only when dislocation density was less than 1.6×106 cm-2,can this metamorphic combination exhibit its efficiency advantage over the fully-matched *** addition,we also briefly evaluated the lattice misfit dependence of the dislocation density for a group of metamorphic triple-junction system,and used it as guidance for the choice of the proper cell structure.

关键词： tandem solar cell theoretical efficiency dislocation buffer layers

Ab initio Calculation of Intermolecular Dispersion energy and Induction energy of Nitramide Dimer

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Chinese Journal of Chemistry 2004年第11期22卷 1377-1381页

作者：宋华杰肖鹤鸣董海山institute of Chemical Materials china Academy of Engineering Physics Mianyang Sichuan 621900 china 黄奕刚institute of Chemical Materials china Academy of Engineering Physics Mianyang Sichuan 621900 china 龙新平institute of Chemical Materials china Academy of Engineering Physics Mianyang Sichuan 621900 china 汤业鹏institute of Chemical Materials china Academy of Engineering Physics Mianyang Sichuan 621900 china Department of Chemistry Nanjing University of Science and Technology Nanjing Jiangsu 210094 China institute of Chemical Materials China Academy of Engineering Physics Mianyang Sichuan 621900 China

The dispersion energies, induction energies and their exchange counterparts (exchange-dispersion and ex-change-induction energies) between two interacting nitramide molecules at several separations are derived based upon symmetry-adapted perturbation theory (SAPT). The results show that (1) the effect of intramonomer electron correlation on dispersion energies and induction energies for nitramide dimer system is remarkable especially in the region near the van der Waals minimum distance (0.42 nm). (2) At smaller separations the dispersion energies and the induction energies are largely quenched by their exchange counterparts, and this case in induction interaction is much more remarkable than in dispersion interaction. (3. Since at shorter distances there exists the strong short-range interaction due to electron transfer which quickly decays and even disappears at larger separations, the two different R-dependency formulae of induction energies were found: one is ca. R-12.7 at short distances, and the other ca. R-7.0 at large separations. The latter R-dependency is similar to that (ca. R-7.2) of dispersion. (4) In the case of strong polar interaction existing in nitramide dimer, the true induction correlation terms of higher order than t(22)indE may be important.

关键词： dispersion energy induction energy nitramide dimer symmetry-adapted perturbation theory

Micromechanical analysis of interaction energy for SMA reinforced composite

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Science china(Technological Sciences) 2009年第3期52卷 610-616页

作者： ZHU YuPing1,2, DUI GuanSuo1 & DUO Liu3.1 institute of Mechanics, Beijing Jiaotong University, Beijing 100044, china 2 Department of Engineering Mechanics, Jiangsu University, Zhenjiang 212013. china 3.State Key Lab of Crystal Materials, Shandong University, Jinan 250100, china institute of Mechanics Beijing Jiaotong University Beijing 100044 China Department of Engineering Mechanics Jiangsu University Jiangsu Zhenjiang 212013 China State Key Lab of Crystal Materials Shandong University Jinan 250100 China

The energy of the interaction between the matrix and the inclusions in shape memory alloy (SMA) re- inforced composite is one of the most important and complicated parts in thermodynamic constitutive theory. In this paper, the interaction energy is derived based on the classical theory of micromechanics and the thermodynamic theory. The SMA composite is treated as three phases, namely the austenitic phase, the martensite phase and the matrix phase. The interaction among the three phases is analyzed in a way close to the fact. The present expression is used to calculate the interaction energy of a typical SMA composite with attentions paid to understand of the effects of the matrix material, the fiber ge- ometry, and the fiber/matrix volume ratio. It is shown that the method developed in this paper is credible compared with the references. Some useful conclusions are obtained.

关键词： shape memory alloy interaction energy SMA composite micromechanics thermodynamics

Complete multiple round quantum dense coding with quantum logical network

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Chinese Science Bulletin 2007年第9期52卷 1162-1165页

作者： LI ChunYan1,2,LI XiHan1,2,DENG FuGuo1,2,3.ZHOU Ping1,2 & ZHOU HongYu1,2,3.1 Key Laboratory of Beam Technology and Material Modification of Ministry of Education,Beijing Normal University,Beijing 100875,china 2 institute of Low energy Nuclear Physics,and Department of Material Science and Engineering,Beijing Normal University,Beijing 100875,china 3.Beijing Radiation Center,Beijing 100875,china Key Laboratory of Beam Technology and Material Modification of Ministry ofEducation Beijing Normal University Beijing 100875 China

We present a complete multiple round quantum dense coding scheme for improving the source ca-pacity of that introduced recently by Zhang et al. The receiver resorts to two qubits for storing the four local unitary ope... 详细信息

关键词：量子通信多重量子紧凑编码量子逻辑网络量子纠缠