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Homoclinic orbits for a perturbed quintic-cubic nonlinear Schrdinger equation

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Communications in Nonlinear Science and Numerical Simulation 2001年第4期 227-230页

作者： Boling GUO and Hanlin CHEN Institute of Applied Physics and Computational Mathematics, Beijing 100088, China mianyang normal college, mianyang 62.000, China

The existence of homoclinic orbits for a perturbed cubic-quintic nonlinear Schr?dinger equation with even periodic boundary conditions under the generalized parameters conditions is established. We combined geometric singular perturbation theory, Melnikov analysis, and integrable theory to prove the persistence of homocliuic orbits.

关键词： perturbation homoclinic orbits invariant manifold persistence

Effect of Grain Size of CaCO_3 and SiO_2.on the Formation of C_3S Under Different Conditions

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Journal of Wuhan University of Technology(Materials Science) 2007年第3期22卷 533-536页

作者：卢忠远 School of Material Science and Engineering Southwest University of Science and Technology

The effect of grain size of CaCO3 and SiO2.on the formation of C3S under various conditions, such as rapid heating rate（800 ℃/min）, normal heating rate（30 ℃/min） and in the presence or absence of ZnO, was studied. The results show that the decomposition temperature of CaCO3, the temperature of appearance of liquid phase and the f-CaO content descend when the grain size of CaCO3 and SiO2.becomes smaller, which attributes to the reactive activity enhancement of powders due to the decrease of the particle size. When the grain size of CaCO3 and SiO2.is below 1 μm, the rate of the formation of C3S is greatly raised. A rapid sintering rate and the presence of ZnO have an important effect on the formation of C3S and can lower the temperature of the formation of C3S by about 50 ℃.

关键词： grain size C3S rapid sintering ZnO

On the Maintenance of High School Students' Interest in English Learning

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科技信息(学术研究) 2007年第15期 368-370页

作者： mianyang normal UniversityRen Yongdong mianyang normal University

There is no doubt that students’ interest is of great significance to the effect of their study. High school students, whose psychological characteristics are different from elementary and junior ones, learn English with more burdens and pressure, needing interest particularly. Under the present circumstances of examination-oriented education, the majority of high school students’ interest which seems indispensable to their English learning is easily strangled by several factors during this period of English learning, which, apparently, brings a negative impact onboth the students’ English studying effect and the teacher’s English teaching quality. Therefore, an English teacher should adopt some flexible and available methods to maintain the students’ interest in English. This paper mainly focuses on a series of concrete methods in terms of how to maintain the students’ interest in the whole process of their English learning.

关键词： motivation needs interest English learning effect

Existence of the time periodic solution for damped Schrdinger-Boussinesq equation

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Communications in Nonlinear Science and Numerical Simulation 2000年第4期 179-183页

作者： Boling GUO and Xianyun DU (Institute of Applied Physics and Computational Mathematics,Beijing 100088, China Graduate School, Chinese Academy of Engineering Physics, Beijing 100088, China Department of Mathematics, mianyang normal college, mianyang 62.000,

In this paper, we study the time priodic solution for the weakly damped Schrodinger- Boussinesq equation, by Galerkin method, and prove the existence and unique- ness of the equations under some appropriate conditions.

关键词： Schrodinger- Boussinesq equation time priodie solution Galerkin met?

Study on Thermodynamic Properties of Lithium by First-principles and Quasi-harmonic Debye Model

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Semiconductor Photonics and Technology 2010年第4期16卷 141-145页

作者： LEI Jiehong1,3, DUAN Hao2. XING Pifeng3, TANG Yongjian3 (1. Physics and Electronic Information Institute, China West normal University, Nanchong 637002. CHN 2. Chemistry and Chemical Engineering college,{2. normal University, mianyang 62.000, CHN 3. Research Center of Laser Fusion, China Academy of Engingeering Physics,{2. 62.900, CHN) Physics and Electronic Information Institute China West Normal University Nanchong 637002 Chemistry and Chemical Engineering college Mianyang Normal University Mianyang 621000 Research Center of Laser Fusion China Academy of Engingeering Physics Mianyang 621900

In this paper, the lattice parameter and bulk modulus of lithium(Li) at different pressures and temperatures are calculated by using the density functional theory method within the generalized gradient approximation(GGA).Through the quasi-harmonic Debye model, the thermodynamic properties of Li are predicted. The dependences of the normalized primitive cell volume V/V0 on pressure P, the variation of the thermal expansion coefficient α with pressure P and temperature T, as well as the dependences of the heat capacity Cv on pressure P and temperature T are obtained systematically in the ranges of 0~100 GPa and 0~2.000 K.

关键词： density functional theory the quasi-harmonic Debye model thermodynamic properties

Theoretical study of ZnO adsorption and bonding on Al_2._3(0001) surface

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Science China(Physics,Mechanics & Astronomy) 2004年第6期47卷 664-675页

作者： LI Yanrong1,YANG Chun1,2.XUE Weidong1,LI Jinshan3 & LIU Yonghua3 1.Institute of Microelectronics and Solid State Electronics,University of Electronic Science and Technol- ogy of China,Chengdu 610054,China 2.Institute of Mathematics and Software Science,Sichuan normal University,Chengdu 610068,China 3.Institute of Chemical Materials,China Academy of Engineering Physics,mianyang{2.,China Institute of Microelectronics and Solid State Electronics University of Electronic Science and Technology of China Chengdu 610054 China Institute of Mathematics and Software Science Sichuan Normal University Chengdu 610068 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang 621000 China

ZnO adsorption on sapphire (0001) surface is theoretically calculated by using a plane wave ultrasoft pseudo-potential method based on ab initio molecular dynamics. The results reveal that the surface relaxation in the first layer Al-O is reduced, even eliminated after the surface adsorption of ZnO, and the chemical bonding energy is 434.3(±38.6) kJ·mol?1. The chemical bond of ZnO (0.185 ± 0.01 nm) has a 30° angle away from the adjacent Al-O bond, and the stable chemical adsorption position of the Zn is deflected from the surface O-hexagonal symmetry with an angle of about 30°. The analysis of the atomic populations, density of state and bonding electronic density before and after the adsorption indicates that the chemical bond formed by the O2.of the ZnO ? and the surface Al3+ has a strong ionic bonding characteristic, while the chemical bond formed by the Zn2. and the surface O2.has an obvious covalent characteristic, which ? comes mainly from the hybridization of the Zn 4s and the O 2. and partially from that of the Zn 3d and the O 2..

关键词： α-Al2.3 (0001) ZnO ab initio molecular dynamics chemical adsorption density of states

内插材料加工范式下语义加工水平(量)对内隐记忆影响的实验研究

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心理科学 2004年第4期27卷 807-811页

作者：陈寒韩玉昌辽宁师范大学心理学系绵阳师范学院心理学系绵阳621000

基于内插材料加工对内隐记忆的干扰的研究范式 (Martens&Wolters,2.0 0 2.)所带来的启示 ,满足启动材料与目标词在语义线索上的匹配要求 ,根据启动材料的数量来控制语义加工水平 (量 )的大小 ,探索意识条件下和无意识条件下 (阈限下 )... 详细信息

基于内插材料加工对内隐记忆的干扰的研究范式 (Martens&Wolters,2.0 0 2.)所带来的启示 ,满足启动材料与目标词在语义线索上的匹配要求 ,根据启动材料的数量来控制语义加工水平 (量 )的大小 ,探索意识条件下和无意识条件下 (阈限下 )语义加工水平 (量 )对内隐记忆的影响。结果表明 ,无论是意识条件下 ,还是无意识条件下 ,内隐记忆成绩随语义加工水平的提高而提高。内插材料加工范式无疑是一种从更微观的角度探讨加工水平对内隐记忆的影响的较好的途径。

关键词：内隐记忆内插材料语义加工水平无意识状态

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体育锻炼影响大学生抑郁水平的中介变量研究

天津体育学院学报 2005年第1期20卷 6-8页

作者：何颖季浏绵阳师范学院体育学院绵阳621000 华东师范大学体育与健康教育学院上海200062

采用调查研究的方法,研究了体育锻炼量与大学生抑郁水平、身体自尊水平的关系,并检验了该研究假设的中介模型。调查结果显示,体育锻炼量与大学生抑郁水平负相关显著;体育锻炼量与大学生身体自尊水平相关显著;大学生抑郁水平与身体自尊... 详细信息

采用调查研究的方法,研究了体育锻炼量与大学生抑郁水平、身体自尊水平的关系,并检验了该研究假设的中介模型。调查结果显示,体育锻炼量与大学生抑郁水平负相关显著;体育锻炼量与大学生身体自尊水平相关显著;大学生抑郁水平与身体自尊水平负相关显著;身体自尊是体育锻炼影响大学生抑郁水平的心理中介变量。

关键词：大学生抑郁身体自尊体育锻炼量心理中介变量

On the Combination Between Information Technology and the Sports Industry

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On the Combination Between Information Technology and the Sp...