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A Fast Algorithm for Phase Grating Preparation by Real Space Method

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Journal of Materials Science & Technology 2001年第2期17卷 240-242页

作者： Qiuxiang LIU and Yuanming WANG Laboratory of atomic Imaging of Solids, institute of Metal Research, Chinese Academy of Sciences, Shengyang 110015, china Qibin YANG and Xiaohong YAN institute of Modern Physics, Xiangtan University, Xiangtan 411105, china Chinese Acad Sci Inst Met Res Atom Imaging Solids Lab Shenyang 110015 Peoples R China Xiangtan Univ Inst Modern Phys Xiangtan 411105 Peoples R China

Making use of this expression to calculate the phase grating in high resolution image simulation can greatly reduce the calculating time. In this paper, the derivation of the expression is introduced, and then the computer routine is explained in details. Finally the potential projection map of Mg44Rh7 along [001] direction is shown as an illustration. All operations are carried out in real space, so we call the calculation method as the real space method.

关键词： A Fast Algorithm for Phase Grating Preparation by Real Space Method

Influence of magnetic current on the ground state entanglement in an isotropic transverse XY chain

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Progress in Natural Science:Materials International 2007年第10期17卷 1147-1151页

作者： Liu Dan1,2 , Zhang Yong3 and Long Guilu1,2(1. Key Laboratory for atomic and Molecular NanoSciences, and Department of Physics, Tsinghua University, beijing 100084, china 2. Center of Quantum Information Science and Technology, Tsinghua National Laboratory for information Science and Technology, beijing 100084, china 3. institute of Physics, School of Sciences, beijing University of Posts and Telecommunications, beijing 100876, china) Key Laboratory for atomic and Molecular NanoSciences and Department of Physics Tsinghua University Beijing 100084 China Center of Quantum Information Science and Technology Tsinghua National Laboratory for information Science and Technology Beijing 100084 China institute of Physics School of Sciences Beijing University of Posts and Telecommunications Beijing 100876 China

We study the ground state entanglement in a three-qubit XY chain under the influence of a magnetization current. It is found that the ground state changes from a W state to a disentangled state as the magnetic field varies. When the Lagrange multiplier λ>3, namely under a strong magnetic current, the ground state holds onto a W state for a large range of the magnetic field strength. A phase transition to the magnetization-current phase occurs under a certain condition.

关键词： heisenberg-XY chain magnetic-current phase transition.

Ionization Potentials and Electron Affinities of Cu_n atomic Clusters

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Journal of Materials Science & Technology 1994年第1期10卷 71-74页

作者： Senyying LIU Rongze HU and Chongyu WANG(Central Iron and Steel Research institute, beijing, 100081, china) Central Iron and Steel Research Inst Beijing China

Ionization potentials and electron affinities of Cux (n = 2-7) atomic clusters with the optimal geom etries have been calculated by use of SC F-Xa-SW method and Slater's transition state theory. Theo retical calcuIations show that the ionization potentiaIs and electron affinities of Cu. (n = 2-7) atom ic clusters have a sharp even / odd alternation with increasing their sizes, which are related to the electronic structure of Cun atomic clusters. The theoretical results are consistent with the related ex perimental ones.

关键词： Cu Rev Ionization Potentials and Electron Affinities of Cu_n atomic Clusters Figure

PREPARATION,PROPERTIES AND INTERFACE STRUCTURES OF Si_3N_(4w)/6061Al COMPOSITE

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Acta Metallurgica Sinica(English Letters) 1992年第11期5卷 423-428页

作者： PAN Jin Changsha institute of Technology,Changsha,chinaNING Xiaoguang YE hengqiang Laboratory of atomic Imaging of Solids,institute of Metal Research,Academia Sinica,Shenyang,china Changsha Inst of Technology Changsha China

The Si_3N_4 whisker reinforced 6061Al composite with bending strength of 790 MPa was prepared by squeeze casting *** heat-treatment under T6 regime i.e.530℃, 1 h solutioning and 160℃,24 h aging,an increment in strength and microhardness may be over 20% and 28% respectively,The microstructures of Si_3N_4 whisker and Si_3N_4/Al interface were observed by meas of *** relation between interracial structure and composite properties was discussed.

关键词： β-Si_3N_4 wthisker Al matrix composite strength interface

Study of the effect of atorvastatin on the interaction between ICAM-1 and CD11b by live-cell single-molecule force spectroscopy

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Science china Chemistry 2010年第4期53卷 752-758页

作者： LI Yi1, SHI XiaoLi2, LIU HuiLiang1, YI ShaoQiong3, ZHANG XueJie2 & FANG XiaoHong2 1Department of Cardiology, the General Hospital of Chinese People’s Armed Police Forces, beijing 100039, china 2beijing National Laboratory for Molecular Sciences institute of Chemistry, Chinese Academy of Sciences, beijing 100190, china 3State Key Laboratory of Pathogen and Biosecurity beijing institute of Microbiology and Epidemiology, beijing 100071, china 1. Department of Cardiology the General Hospital of Chinese People’s Armed Police Forces Beijing 100039 China2. Beijing National Laboratory for Molecular Sciences Chinese Academy of Sciences Beijing 100190 China4. Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China3. State Key Laboratory of Pathogen and Biosecurity Beijing 100071 China5. Beijing Institute of Microbiology and Epidemiology Beijing 100071 China

The interaction between the cell adhesion molecule CD11b and its ligand ICAM-1 plays an important role in inflammatory responses in the disease of atherosclerosis. Atorvastatin is a commonly prescribed statin drug which has been considered as one of the most potent therapeutic agents for atherosclerosis due to its lipid-lowering effect. Recently, there is a growing body of evidence that atorvastatin has anti-inflammatory effect. We have applied the advanced method of live-cell single-molecule force spectroscopy to investigate the effect of atorvastatin on adhesion force between ICAM-1 and CD11b. Our result showed that single-molecule binding force of ICAM-1 and CD11b detected by AFM in the living cells was about 40 pN, and atorvastatin did not affect this force by blocking ICAM-1 or CD11b. This was different from the ICAM-1 monoclonal antibody, which could directly reduce the binding force of ICAM-1 and CD11b. Flow cytometry results revealed that atorvastatin pretreatment decreased the ICAM-1 expression in TNF-α activated HUVECs, which may contribute to its anti-inflammatory effect. The study provides a new approach to study anti-inflammatory mechanism for clinic drugs.

关键词： atherosclerosis atorvastatin atomic force microscopy single-molecule force spectroscopy protein-protein interaction

Deformation-induced α_2/γ Interfaces in a Hot-deformed Ti-45Al-10Nb Alloy

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Journal of Materials Science & Technology 1998年第2期14卷 132-138页

作者： Jinguo WANG Lichun ZHANG and Guoliang CheN (State Key Lab. for Advanced Metals and Materials, University of Science and Technology beijing, beijing 100083, china )henqiang YE(Lab. of atomic Imaging of Solids, institute of Metal Research, Chinese Academy State Key Lab. for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Lab. of atomic Imaging of Solids Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

The structure change of α2/γ interface in a Ti-45Al-10Nb alloy induced by hot deformation was investigated by conventional and high-resolution transmission eIectron microscopy. Two types of hot deformation induced special α2/γ intedeces, coherent intedeces with high density of ledges and semi-coherent α2/γ intedeces were found to be due to the absorption of mobile dislocations into the α2/γ inteface. For the misoriented semi-coherent α2/γ interfaces, the densities of dislocation ledges increase with the misoriented angle between (111)γ and (0001)α2 planes, and 1/3[111] Frank partial dislocations were involved in the dislocation ledges. Formation mechanism of these deformation-induced α2/γ interfaces was discussed to be related to the role of α2/γ interface5 adjusting the deformation as a dislocation sink absorbing the slipping dislocations in the γ phase

关键词： Al Ti Interfaces in a Hot-deformed Ti-45Al-10Nb Alloy Deformation-induced

EVOLUTION CHARACTERISTICS IN PLASMA-SheATH WITH PERIODICALLY FORCED OSCILLATION

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Science in china,Ser.A 1986年第8期29卷 835-846页

作者：方锦清周刘来 institute of atomic energy. Academia Sinica beijing

This paper considers plasma-sheath physical model with a periodically forced oscillation. The numerical study on the equation of the plasma-sheath has been carried out with a few methods. It has been found that the three well-known transition routes to chaos coexist in the model as the control parameters are varied separately. We make a discussion on the relation between the results and physical process and point out that this intrinsic stochastlcs is a prineipal origin leading to the plasma instability in some plasma devices(e.g. plasma ion sources, electromagnetic isotope separator and so on).

关键词： EVOLUTION CHARACTERISTICS IN PLASMA-SheATH WITH PERIODICALLY FORCED OSCILLATION mode As Hopf

Threading dislocation density comparison between GaN grown on the patterned and conventional sapphire substrate by high resolution X-ray diffraction

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Science china(Physics,Mechanics & Astronomy) 2010年第3期53卷 465-468页

作者： ZHANG YuChao1, XING ZhiGang2, MA ZiGuang2, CheN Yao2, DING GuoJian2, XU PeiQiang2, DONG ChenMing3, CheN Hong2 & LE XiaoYun1 1 School of Physics and Nuclear energy Engineering, Beihang University, beijing 100190, china 2 Renewable energy Laboratory, institute of Physics, Chinese Academy of Sciences, beijing 100190, china 3 School of Information and Communication, Tianjin Polytechnic University, Tianjin 300160, china 1. School of Physics and Nuclear energy Engineering Beihang University Beijing 100190 China2. Renewable Energy Laboratory Institute of Physics Chinese Academy of Sciences Beijing 100190 China3. School of Information and Communication Tianjin Polytechnic University Tianjin 300160 China

GaN epifilms are grown on the patterned sapphire substrates (PSS) (0001) and the conventional sapphire substrates (CSS) (0001) by metal-organic chemical vapor deposition (MOCVD) using a novel two-step growth. High resolution X-ray diffraction (HR-XRD) is used to investigate the threading dislocation (TD) density of the GaN epifilms. The TD density is calculated from the ω-scans full width at half maximum (FWHM) results of HR-XRD. The edge dislocation destiny of GaN grown on the PSS is 2.7×108 cm-2, which is less than on the CSS. This is confirmed by the results of atomic force microscopy (AFM) measurement. The lower TD destiny indicates that the crystalline quality of the GaN epifilms grown on the PSS is improved compared to GaN epifilms grown on the CSS. The residual strains of GaN grown on the PSS and CSS are compared by Raman Scattering spectra. It is clearly seen that the residual strain in the GaN grown on PSS is lower than on the CSS.

关键词： GaN patterned sapphire substrate threading dislocation XRD

Study on the Diffraction Patterns of α"-Fe_(16)N_2 with Jack-1 and Jack-2 Structural Parameters

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Journal of Materials Science & Technology 2000年第4期16卷 362-366页

作者： Zhiquan LIU and Douxing LI (Laboratory of atomic Imaging of Solids, institute of Metal Research, CAS, Shenyang 110015, china) Xiaolei XU, Liang WANG and Zukun heI (institute of Materials and Technology, Dalian Maritime University, Dalian 116026, china) Laboratory of atomic Imaging of Solids Institute of Metal Research CAS Shenyang 110015 China institute of Materials and Technology Dalian Maritime University Dalian 116026 China

Two body centered tetragonal (bet) crystal structures of α'-Fe_(16)N_2 with x=0.25, z=0.3125 (Jack-1) and x=0.222, z=0.306 (Jack-2) respectively, were analyzed theoretically with EMS software package. The simulation of diffraction patterns indicates that both diffraction patterns of the same axis in these two structures obey bcc extinction rule. The conclusion is also obtained from the analyses of the diffracted waves. α'-Fe_(16)N_2 precipitates in the diffusion layer of ion-nitrided α-iron have been studied with transmission electron microscope (TEM). We have distinctly observed the electron diffraction patterns of α'-Fe_(16)N_2 in [100], [111], [110], [011], [210], [021], [311], [113], [331] and [133] zone axes with perfect symmetry, which indicate the parallel orientation relationship with α matrix:α'//α'// {100}.α'// {100}ｔα. The analyses of diffraction patterns, which obey bcc extinction rule, verify the bct structure of α'-Fe_(16)N_2 discovered by X-ray diffraction.

关键词： Study on the Diffraction Patterns of Jack N2 with Jack-1 and Jack-2 Structural Parameters Fe