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Research of the morphology of Zhejiang coastal port cities

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Journal of Geographical Sciences 1998年第1期8卷 65-71页

作者： Wang YichengDept of Geography, Ningbo normal university, Ningbo 3.5211, chinaWu QiyanDept of Geography,{3., dalian 116029, china

Lince port cities are the first new force of china's economy to outside world, they have been developing rapidly under the open policy In this article, Zhejiang's coast port cities are taken as research subject Through intensive analysis of a great number of data which had been obtained during onthespot investigations, the regional conditions, superior and inferior conditions for development of Zhejiang's coast port cities are systematically surveyed, the development of their overall distribution trait, internal structure morphology and outer morphology is examined and the development trend of port city allocation is identified which provide theoretical basis for the further development of port cities

关键词： Zhejiang port cities port distribution pattern

Effect of Nitrogen Ion Implantation on the Structure and Corrosion Resistance of Equiatomic NiTi Shape Memory Alloy

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Journal of Wuhan university of Technology(Materials Science) 2006年第4期21卷 36-39页

作者：华英杰 department of Chemistry Hainan Normal University Haikou 571158China

To protect the surface of NiTi from corrosion, an ion implantation method was proposed. In the present work, a surface oxidized sample was implanted with nitrogen at energy of 100 keV. The corrosion resistarwe property was examined by the anodic polarization method in a simulated body fluid （SBF） at a temperature of 3. ℃ and contrasted to non-implanted NiTi samples. The composition and structure of the implanted layers were investigated by XPS. The experimental results from the electrochemical measurements provide an evidence that the nitrogen ion-implantation increases the corrosion resistance of NiTi shape memory alloy.

关键词： biocompatibility NiTi shape memory alloy ion implantation corrosion resistance

X-ray spectra induced by ^(129)Xe^(q+) impacting the metal surface

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Science china(physics,Mechanics & Astronomy) 2008年第1期51卷 82-89页

作者： ZHANG XiaoAn 1,2 ,XIAO GuoQing 1 ,YANG ZhiHu 1 ,CHEN XiMeng 3.,ZHAO YongTao 1 , LI FuLi 4 ,WANG Li 1,2 ,CUI Ying 3.,ZHANG HongQiang 3.&ZHAN WenLong 1 1Institute of Modern physics,Chinese Academy of Sciences,Lanzhou 73.000,china 2department of physics,Xianyang normal university,Xianyang 712000,china 3.2} of Modern physics,Lanzhou university,Lanzhou 73.000,china 4department of Applied physics,Xi’an Jiaotong university,Xi’an 710049,china 1. Institute of Modern physics Chinese Academy of Sciences Lanzhou 730000 China 2. department of physics Xianyang Normal University Xianyang 712000 China 3. department of Modern physics Lanzhou University Lanzhou 730000 China 4. department of Applied physics Xi’an Jiaotong University Xi’an 710049 China

Using the slow highly charged ions 129 Xe q+ (q=25,26,27;initial kinetic T0≤4.65 keV/a.u.)to impact Au surface,the Au atomic Mαcharacteristic X-ray spectrum is *** result shows that as long as the charge state of projectile is high enough,the heavy atomic characteristic X-ray can be effectively excited even though the incident beam is very weak(nA magnitude),and the X-ray yield per ion is in the order of 10-8and increases with the kinetic energy and potential energy of *** measuring the Au Mα-X-ray spectra,Au atomic N-level lifetime is estimated at about 1.3.×10-18s based on Heisenberg uncertainty relation.

关键词： slow highly charged ions characteristic X-ray level lifetime

Particle tunnels across the horizon of Garfinkle-Horowitz-Strominger dilaton black hole

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Science china(physics,Mechanics & Astronomy) 2007年第5期50卷 601-610页

作者： FANG HengZhong1 & ZHAO Zheng2 1 department of physics, china {3. of Petroleum, Dongying 257061, china 2 department of physics, Beijing normal {3., Beijing 100875, china department of physics China University of Petroleum Dongying 257061 China department of physics Beijing Normal University Beijing 100875 China

We promote the work of Parikh and Wilczek on the black hole radiation to the emission of massive and charged particles from Garfinkle-Horowitz-Strominger black hole. The energy and charge of the space-time are conservational during the course of the evaporation. The calculation shows that the emission spectrum is not precisely thermal, while has a correction, and the conclusion supports the view- point of information conservation.

关键词： Hawking radiation, black body spectrum, barrier, information loss, entropy of black hole, Komar energy

Electronic structure and magnetism of R(Fe,Si)_(12) (R=Y,Nd)

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Science china(physics,Mechanics & Astronomy) 2006年第2期49卷 195-202页

作者： SUN Guang’ai1, CHEN Bo1, DU Honglin2, FAN Zhijian1, GAO Tao3.& QI Xinhua3.. Institute of Nuclear physics and Chemistry, china Academy of Engineering physics, Mianyang 621900, china 2. department of physics, Peking university, Beijing 100871, china 3. Institute of Atomic and Molecular physics, Sichuan university, Chengdu 610065, china 1. Institute of Nuclear physics and Chemistry China Academy of Engineering Physics Mianyang 621900 China 2. department of physics Peking university Beijing 100871 China 3. Institute of Atomic and Molecular physics Sichuan University Chengdu 610065 China

The newly developed full-potential linearized augmented plane wave (LAPW) and local orbitals (lo) based on standard APW methods are briefly introduced, and the structure and magnetic properties of R(Fe, Si)12 compounds (R = Y, Nd) are calculated using the method. The distribution of Si at different sites is analyzed based on total energy of one crystal unit with structure having been optimized. The characters of magnetic mo-ments, total density of states (TDOS) and partial density of states (PDOS) for different crystal sites Si occupies are obtained and analyzed. The results show that the total mag-netic moments of RFe10Si2 (R = Y, Nd) are larger than those of RFe10M2 (M = Ti, V, Cr, Mn, Mo and W) and the hybridization mechanism is seen as follows. Si(8j) reduce the mag-netic moments of Fe at three sites, however, Si(8f) mainly reduce the magnetic moments of Fe(8i) and Fe(8j) atoms. The Curie temperature is markedly enhanced by the introduc-tion of Si atoms according to spin fluctuation of DOS at Fermi level.

关键词： (L)APW+lo method R(Fe Si)12(R = Y Nd) magnetic moment Density of state.

Observations favor the crossing of phantom divide lines

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Science china(physics,Mechanics & Astronomy) 2010年第3期53卷 562-566页

作者： HUANG TieTie1,2,3. WU PuXun2,3.& YU HongWei2,3.1department of physics, Xiangnan College, Chenzhou 423.00, china 2department of physics and Institute of physics, Hunan normal university, Changsha 410081, china 3.ey Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan normal university, Changsha 410081, china 1. department of physics Xiangnan College Chenzhou 423000 China2. Department of Physics and Institute of Physics Hunan Normal University Changsha 410081 China3. Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education Hunan Normal University Changsha 410081 China

Using three different parameterized dark energy models, we reconstruct the properties of dark energy from the latest 3.7 Sne Ia, CMB and BAO with the present matter density, Ωm0, given prior. We find that, when Ωm0 is not small, for example, Ωm0 = 0.28 or 0.3., an evolving dark energy with a crossing of phantom divide line is favored and this conclusion seems to be model independent. We also find that the evolving properties of dark energy become more and more evident with the increase of Ωm0 given prior.

关键词： cosmology auelerating expansion dark energy

A　COMPARATIVE　STUDY　ON　THE　PHOTOVOLTAIC　PROPERTIES　OF　BUCKMINSTERFULLERENE　（C60）　AND　ITS　ANION　SALT

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Chinese Chemical Letters 1996年第4期7卷 351-352页

作者： Zhan Jun YU Peng ZHANG Lin Song LI De Jun WANG Wen Sheng GUO Tie Jin LI(Deprtment of Chemistry,Jilin university,Changchun 13.023.(department of Chemistry,liaoning {3. university, dalian 116029) JILIN UNIV DEPT CHEM CHANGCHUN 130023 PEOPLES R CHINA liaoning normal UNIV DEPT CHEM DALIAN 116029 PEOPLES R CHINA

Measurements of Surface Photovoltage Spectroscopy(SPS)Were carried out for C60(A)and its anion salt(B)for the first *** a reference of UV-vis spectra,the results for SPS are discussed in terms of Molecular Orbit(MO) and Surface Photovoltage(SPV)theory. By a comperison between(A)and(B)'s characteristic responses is SPS,a deeper insisht into the nature of their photovoltaic properties is obtained.

关键词： ITS C60 SALT AND ANION

BINDING ENERGY OF SHALLOW DONOR IN In_xGa_(1-x)As/GaAsSTRAINED QUANTUM WELL

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Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 88-92页

作者： J. H. Xing(department of physics, liaoning {3., Shenyang 11003., china)H.L. Huang(department of Electronic Science and Engineering, liaoning {3., Shenyang 11003., china) liaoning Univ Shenyang China

The effect of the dielectric mismatch between the well and the barrier materials on the binding energies of shallow donor has been investigated in Inx Ga1-xAs/GaAsstrained quantum well. The binding energies as a function of the well widths and impurity positions in the well and the barriers are obtained by using a variational method. Calculation results show that the effect of the dielectric mismatch is quite sizable and such effect is larger for off-center impurity positions,but the effect of the lattice mismatch is small in general.

关键词： quantum well shallow donor binding energy

ARNOLDI TYPE ALGORITHMS FOR LARGE UNSYMMETRICMULTIPLE EIGENVALUE PROBLEMS

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Journal of Computational Mathematics 1999年第3期17卷 257-274页

作者： Zhong-xiao Jia(department of Applied Mathematics, dalian university of Technology, dalian 116024, china) 大连理工大学应用数学系辽宁大连

As is well known, solving matrix multiple eigenvalue problems is a very difficult topic. In this paper, Arnoldi type algorithms are proposed for large unsymmetric multiple eigenvalue problems when the matrix A involved is diagonalizable. The theoretical background is established, in which lower and upper error bounds for eigenvectors are new for both Arnoldi's method and a general perturbation problem, and furthermore these bounds are shown to be optimal and they generalize a classical perturbation bound due to W. Kahan in 1967 for A symmetric. The algorithms can adaptively determine the multiplicity of an eigenvalue and a basis of the associated eigenspace. Numerical experiments show reliability of the algorithms.

关键词： Arnoldi's process large unsymmetric matrix multiple eigenvalue diagonalizable error bounds