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Low-Resistant Band-Passing Noise and Its Dynamical Effects

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Communications in Theoretical physics 2007年第7期48卷 112-116页

作者： BAI Zhan-Wu department of Applied physics,North china Electric Power university,baoding 071003,china department of Applied physics North China Electric Power University

We propose an n-order noise,which is realized by driving an n-order linear differential equation with aGaussian white *** time-derivative noise is a low-resistant band-passing *** the derivative noise is regardedas a thermal one,the system has a vanishing effective friction and it should induce ballistic diffusion of a free particleat long *** simulation method for the generalized Langevin equation driven by the n-order noise is *** features of three-order derivative noises are presented when they are applied to a ratchet system.

关键词： n-order noise ballistic diffusion Langevin simulation ratchet system

Automorphisms with order three of affine Lie algebras

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Chinese Science Bulletin 1998年第21期43卷 1793-1798页

作者： JIN Quanqin 1,2 and HOU Zixin 2 1. department of Mathematics, Hebei university, baoding 071002, china 2. department of Mathematics, Nankai university, Tianjin 300071, china department of Mathematics Hebei University Baoding China department of Mathematics Nankai University Tianjin China

Some properties of automorphisms of affine Lie algebras are presented. Automorphisms with order three are classified up to conjugacy, and their fixed point sets are also computed. As a corollary, it is proved that two... 详细信息

关键词： affine Lie algebra automorphism of order three first (second) kind of automorphism.

Research progress in the study of atmospheric pressure glow barrier discharge

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Progress in Natural Science:Materials International 2007年第3期17卷 247-253页

作者： LI Xuechen, DONG Lifang and JIA Pengying (College of physics Science and Technology, Hebei university, baoding 071002, china) College of physics Science and Technology Hebei University Baoding 071002 China

Atmospheric pressure glow barrier discharge (APGBD) can operate at high pressure, and so vacuum device is not necessary. Furthermore, the produced plasma by APGBD has moderate electron temperature and density besides good uniformity. Therefore, APGBD has extensive potential applications in industry and has been becoming a hot issue in the research of low temperature plasma. In this paper, the main problems in the study of atmospheric pressure glow discharge generated by dielectric barrier discharge, including the experimental setup, judging criterion, discharging conditions, physical mechanisms, and parameter diagnoses, are discussed, and further research prospects of APGBD are proposed.

关键词： atmospheric pressure glow discharge dielectric barrier discharge low temperature plasma.

On the Duality Mapping Sets in Orlicz Sequence Spaces

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Acta Mathematica Sinica,English Series 2001年第4期17卷 595-602页

作者： Bao Xiang WANG department of Mathematics, Hebei university, baoding 071002, P. R. china department of Mathematics Hebei University Baoding 071002 P. R. China

The criteria for the weak compactness of duality mapping sets J(x)={f∈X~*:〈f,x〉= ‖f‖~2=‖x‖~2}in Orlicz sequence spaces endowed either with the Luxemburg norm or with the Orlicz norm are obtaned.

关键词： Orlicz sequence spaces Duality mapping Weak compactness

Statistical theory for hydrogen bonding fluid system of A_aD_d type (I): The geometrical phase transition

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Science china Chemistry 2006年第6期49卷 499-506页

作者： WANG Haijun1,2, HONG Xiaozhong3, GU Fang1 & BA Xinwu1 1. College of Chemistry and Environment Science, Hebei university, baoding 071002, china 2. International Center for Materials physics, Chinese Academy of Sciences, Shenyang 110016, china 3. College of physics Science and Technology, Hebei university, baoding 071002, china 1. College of Chemistry and Environment Science Hebei University Baoding 071002 China 2. International Center for Materials physics Chinese Academy of Sciences Shenyang 110016 China 3. College of physics Science and Technology Hebei University Baoding 071002 China

The influence of hydrogen bonds on the physical and chemical properties of hydrogen bonding fluid system of AaDd type is investigated from two viewpoints by the principle of statistical mechanics. In detail, we proposed two new ways that can be used to obtain the equilibrium size distribution of the hydrogen bonding clusters, and derived the analytical expression of a relationship between the hydrogen bonding free energy and hydrogen bonding degree. For the nonlinear hydrogen bonding systems, it is shown that the sol-gel phase transition can take place under proper conditions, which is further proven to be a kind of geometrical phase transition rather than a thermodynamic one. Moreover, several problems associated with the geometrical phase transition and liquid-solid phase transition in nonlinear hydrogen bonding systems are discussed.

关键词： hydrogen bonding fluid, equilibrium free energy, geometrical phase transition.

Influence of oxygen gas content on the structural and optical properties of ZnO thin films deposited by RF magnetron sputtering at room temperature

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Rare Metals 2011年第2期30卷 170-174页

作者： LIU Baoting ZHOU Yang ZHENG Hongfang LI Mana GUO Zhe HAO Qingxun PENG Yingcai College of physics Science and Technology Hebei University Baoding 071002 China baoding university Baoding 071000 China College of Electronic and Information Engineering Hebei University Baoding 071002 China

Zinc oxide （ZnO） thin films were deposited on sapphire （0001） substrates at room temperature by radiofrequency （RF） magnetron sputtering at oxygen gas contents of 0%, 25%, 50% and 75%, respectively. The influence of oxygen gas content on the structural and optical properties of ZnO thin films was studied by a surface profile measuring system, X-ray diffraction analysis, atomic force microscopy, and UV spectro- photometry. It is found that the size of ZnO crystalline grains increases first and then decreases with the increase of oxygen gas content, and the maximum grain size locates at the 25% oxygen gas content. The crystalline quality and average optical transmittance （〉90%） in the visi- ble-light region of the ZnO film prepared at an oxygen gas content of 25% are better than those of ZnO films at the other contents. The obtained results can be attributed to the resputtefing by energetic oxygen anions in the growing process.

关键词： thin films zinc oxide magnetron sputtering oxygen structural properties optical properties

Minimal symmetric submanifolds in compact Riemannian symmetric spaces

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Chinese Science Bulletin 1998年第21期43卷 1786-1789页

作者： LIANG Ke 1 and JIN Quanqin 1,2 1. department of Mathematics, Nankai university, Tianjin 300071, china 2. department of Mathematics, Hebei university, baoding 071002, china department of Mathematics Nankai University Tianjin China department of Mathematics Hebei University Baoding China

A necessary and sufficient condition for a symmetric submanifold to be minimal in its ambient compact Riemannian symmetric space is given. By this condition a complete classification of non- minimal symmetric submanif... 详细信息

关键词： symmetric space symmetric submanifold mean curvature vector.

Grassmann geometry on symmetric spaces

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Chinese Science Bulletin 1999年第1期44卷 41-44页

作者： JIN Quanqindepartment of Mathematics, Hebei university, baoding 071002, china department of Mathematics, Nankai university, Tianjin 300071,china department of Mathematics Hebei University Baoding China department of Mathematics Nankai University Tianjin China

A duality principle between Grassmann geometries on compact symmetric spaces and those on noncompact symmetric spaces is proved, which greatly facilitates the study of Grassmann geometry on symmetric spaces. Those Gra... 详细信息

关键词： symmetric spaces Grassmann geometry Cartan decomposition orthogonal symmetric Lie algebra totally geodesic submanifold.

Effect of Spontaneous Emission on Both Atomic Dynamics and Momentum Transfer of an Atomcavity System

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Chinese Journal of Lasers 1999年第4期8卷 3-5页

作者： YI Xuexi 1 WANG Haijun 2 BA Xinwu 2 WANG Jianwei 3 ( 1 Institute of Theoretical physics, Northeast Normal university, Changchun 130024, china 2.department of Chemistry, Hebei university, baoding 071000, china 3 department of 东北师范大学理论物理所吉林长春 130024 河北大学化学系河北保定 071000 河北大学化学系河北保定喀什师范学院物理系新疆喀什 844000

The dynamics of an atom coupling to a quantized cavity field have been studied. The atom is treated as a two level system with a spontaneous emission rate. The transition probabilities have been given for both adiabatic and non adiabatic situations. For a special Λ type atom with dark state, the problem of momentum transfer is discussed in details. The influence of spontaneous emission on validity of the adiabatic approximation is also discussed.

关键词： atomic dynamic momentum transfor quantized cavity