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THE HYBRID PROBLEM OF FREE-SURFACE GRAVITY SPILLWAY FLOW TREATED BY VARIATIONAL PRINCIPLES WITH VARIABLE DOMAIN: POTENTIAL fUNCTION FORMULATION

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Journal of Hydrodynamics 1992年第3期4卷 118-122页

作者： Liu Gao-lian Shanghai institute of applied Math.& {2. and Shanghai {3. of technology Shanghai 2.0072.P.R.China

Making full use of functional variations with variable domain for handling both the free surface and unknown part of the dam wall,a family of variational principles(VPs)for the hybrid(direct-inverse)problem of free surface spillway flow under gravity is formulated in terms of the potential function Φ.This theory offers new rational and versatile ways for dam de- sign and a sound theoretical basis for numerical solution,*** the finite element method (FEM).

关键词： dam design finite element method free-surface gravity spillway flow variational principles variable domain

THz spectrum of reduced glutathione

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Science China(Physics,mechanics & Astronomy) 2005年第5期48卷 585-592页

作者： WANG Weining1, YAN Haitao1, YUE Weiwei1, ZHAO Guozhong1, ZHANG Cunlin1, LIU Haibo2.& ZHANG Xicheng2.1. Department of Physics, Capital Normal university, Beijing 10003., China 2. Center for Terahertz Research, Rensselaer Polytechnic {2., Tory, NY, USA Department of Physics Capital Normal Univesity Beijing China Center for Terahertz Research Rensselaer Polytechnic Institute Tory USA

The optical characteristics of reduced glutathione molecules between 0.2.THz and 2.4 THz have been investigated by THz time-domain spectroscopy (THz-TDS). The absorption characteristics and optical parameters of the reduced glutathione purged with Nitrogen at room temperature were obtained experimentally. The measured results were fitted well with the theoretical results computed by using Density Functional Theory (DFT) in far-infrared range. Also the conformation of the reduced glutathione molecule was simulated by Gaussian 03. This work has demonstrated significantly that THz-TDS spectroscopy can further be used to study other biological molecules in biological and biomedical engineering.

关键词： THz time domain spectroscopy, reduced glutathione, absorption spectrum, biological engineering.

Study of proton resonances in ^(18)Ne via resonant elastic scattering of ^(17)F+p and its astrophysical implication

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Science China(Physics,mechanics & Astronomy) 2011年第S1期54卷 32-36页

作者： HE JianJun1, HU Jun1,2. XU ShiWei1, CHEN ZhiQiang1, ZHANG XueYing1, WANG JianSong1, YU XiangQing1, ZHANG LiYong1,2. LI Long1,2. YANG YanYun1,2. MA Peng1,2. ZHANG XueHeng1, HU ZhengGuo1, GUO ZhongYan1, XU Xing1,2. YUAN XiaoHua1, LU Wan1,2. YU YuHong1, ZANG YongDong1,2. TANG ShuWen1,2. YE RuiPing1,2. CHEN JinDa1,2. JIN ShiLun1,2. DU ChengMing1,2. WANG ShiTao1,2. MA JunBing1,2. LIU LongXiang1,2. BAI Zhen1,2. LEI XiangGuo1, SUN ZhiYu1, ZHANG YuHu1, ZHOU XiaoHong1, XU HuShan1, SU Jun3. LI ErTao3. WANG HongWei4, TIAN WenDong4 & LI XiangQing5 1 {2. of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 73.000, China 2.Graduate university of Chinese Academy of Sciences, Beijing 100049, China 3.China {2. of Atomic Energy (CIAE), Beijing 102.13. China 4 Shanghai {2. of applied Physics (SINAP), Chinese Academy of Sciences, Shanghai 2.1800, China 5 School of Physics and State Key Laboratory of Nuclear Physics and technology, Peking university, Beijing 100871, China institute of Modern Physics (IMP) Chinese Academy of Sciences Lanzhou China Graduate university of Chinese Academy of Sciences Beijing China China institute of Atomic Energy (CIAE) Beijing China Shanghai institute of applied Physics (SINAP) Chinese Academy of Sciences Shanghai China School of Physics and State Key Laboratory of Nuclear Physics and technology Peking University Beijing China

The proton resonant properties in 18Ne, which determine the reaction rate of the key stellar 14O(α,p)17F reaction, have been studied by using a technique of proton resonant elastic scattering of 17F+p. A 4.2. MeV/nucleon 17F radioactive ion (RI) beam was produced via a projectile-fragmentation reaction, and separated by a Radioactive Ion Beam Line in Lanzhou (RIBLL). By bombarding a thick (CH2.n target, the energy spectra of the recoiled protons were measured by two ΔE-E silicon telescopes at the center-of-mass scattering angles of θc.m.≈175°±5°, θc.m.≈152.±8°, respectively. Several proton resonances in 18Ne were ob served clearly. A further R-matrix analysis of the experimental data is under way to determine the resonant parameters. The present work reports the preliminary results briefly.

关键词： resonant reaction reaction rate explosive burning accreting binary systems

复弯矩表示的非圆截面杆平衡的Schrdinger方程及其半解析解

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力学季刊 2004年第4期25卷 463-469页

作者：薛纭刘延柱陈立群上海市应用数学和力学研究所上海大学上海交通大学工程力学系上海200030

弹性细杆的平衡和稳定性问题的研究在工程和分子生物学中有重要的应用背景。利用文中提出的复柔度概念,建立了用复弯矩表示的非圆截面杆平衡的Schrdinger方程。借助复曲率概念,导出以杆的曲率、挠率和截面相对Frenet坐标系的扭角为未知... 详细信息

弹性细杆的平衡和稳定性问题的研究在工程和分子生物学中有重要的应用背景。利用文中提出的复柔度概念,建立了用复弯矩表示的非圆截面杆平衡的Schrdinger方程。借助复曲率概念,导出以杆的曲率、挠率和截面相对Frenet坐标系的扭角为未知变量的2.常微分方程,此方程与传统使用的Kirchhoff方程等价。文献中仅适用于圆截面杆平衡问题的Schrdinger方程为本文导出方程的特例。对于准对称截面杆,用小参数法分别建立了零次和一次近似方程,其中零次近似方程存在解析解。对于截面的主轴坐标轴与中心线的Frenet坐标轴重合的无扭转杆特殊情形,Schrdinger方程转化为Duffing方程,应用数值方法作出了Duffing杆变形后的三维几何图形。

关键词：非圆截面弹性细杆 Schrǒdinger方程 Duffing方程数值模拟

Vibration parameter measurement using the temporal digital hologram sequence and windowed Fourier transform

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Theoretical & applied mechanics Letters 2011年第5期1卷 36-40页

作者： Chong Yang,1,2.and Hong Miao 1,1) Key Laboratory of Mechanical Behavior and Design of Materials (CAS) Department of Modern mechanics,university of Science and {2. of China,Anhui 2.3}02.,China 2. {3. of Structural mechanics Chinese Academy of Engineering Physics,Sichuan 62.900,China Key Laboratory of Mechanical Behavior and Design of Materials (CAS) Department of Modern mechanics University of Science and Technology of China Anhui 230027 China institute of Structural mechanics Chinese Academy of Engineering Physics Sichuan 621900 China

Real time digital recording and numerical reconstruction of a temporal digital hologram sequence have become feasible in recent *** provide a new measurement method which enjoys the valuable advantages of being full-field,noncontact and high *** this paper,a combined method of temporal digital hologram sequence and windowed Fourier transform is proposed to measure the kinematic parameters of random vibration.A series of holograms are recorded by CCD camera and the original phase can be reconstructed by Fresnel reconstruction *** three-dimensional windowed Fourier transform is used to filter noise in phase and extract the instantaneous kinematic parameters of the specimen,such as the displacement,velocity and *** experiment is conducted on a chloroprene rubber latex *** demonstrate that the proposed method determines the vibration parameters precisely and enjoys many merits.

关键词： vibration measurement digital holography temporal digital hologram sequence windowed Fourier transform

Antibacterial and wear properties of carbon and nitrogen codoped TiO2.coatings prepared by oxidation of sputtered Ti（C,N） coatings

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Antibacterial and wear properties of carbon and nitrogen cod...

Design of Integrated Navigation System Based on Information Fusion technology

第三届微电子及等离子体技术国际会议

作者： Hefeng Wang 1 2.Bin Tang 1 Xiuyan Li 1 1 Research institute of Surface Engineering taiyuan university of technology {2. China 2.School of Physics and Electronic Science Shanxi Datong {3. Datong 03.009 China

Antibacterial modification of medical stainless steel（SS） has already been developed as a potentially effective method for preventing device-associated ***,low hardness values and poor tribological properties require improvement of SS surface *** resolve these problems,carbon and nitrogen codoped TiO2.C-N-TiO2. coatings were fabricated on 3.6L austenitic stainless steel substrates by oxidation of Ti（C,N） coatings,which were prepared by the plasma surface alloying *** investigation,wear tests and antibacterial tests were conducted to study the properties of C-N-TiO2.*** analysis shows that the SS substrates were shielded by the C-N-TiO2.coatings *** C-N-TiO2.coatings are anatase in structure as characterized by X-ray *** a load of 7.6 N,the coefficient of friction is in the range of 0.2.～0.3. for the C-N-TiO2.Al2.3.systems and the wear rate of the coatings is only one-fourteenth of that for untreated 3.6L SS.C-N-TiO2.coatings display much better wear resistance and antifriction performance than that of SS *** effective reduction of 98.7% of staphylococcus aureus（***） within 3.h was achieved by contact with the C-N-TiO2.coatings.

关键词： Stainless steel Codoped titanium dioxide Antibacterial property Wear plasma alloying technology

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Design of Integrated Navigation System Based on Information ...

第二十四届中国控制会议

作者： Chunmei Huang~(1,2., Yantao Tian~1, Wanxin Su~3. Yuhua Wang~2.1. School of Communications, Jilin university, Changchun 13.02. China) 2. Changchun university of {2., Changchun 13.012.3. Changchun {3. of Optics, Fine mechanics and Physics, Chinese Academy of Sciences Changchun 13.03.

With the rapidly development of science and technology. The single navigation system for positioning and orientating is not adequate for the requirement of navigation, position, and orientation in the field of military and civil. The higher precision and cheaply cost of integrated navigation system are gradually applied for every field. Therefore, the combination of GPS and INS constitute the integrated navigation system becoming a developmental direction. This thesis discusses the technology problem and calculation methods of GPS/GLONASS/INS integrated navigation system. Firstly, it summarizes the merit and demerit of GPS and INS navigation system respectively. Putting forward the GPS/GLONASS/INS integrated navigation system based on information fusion technology. Also, a new method of GPS/GLONASS/INS integrated navigation system for quick positioning and orientating is presented, on the basis of which the scheme and the principles are given. Then a multi-sensor information fusion algorithm based on federal kalman filter is analyzed in detail. Finally, the computer simulation is given. The results show that federal kalman filter can deal with information fusion for the GPS/GLONASS/INS integrated system. Efficiently improving the accuracy and the reliability of the navigation system. It is the best way for seeking the navigation parameter and lead to the GPS/GLONASS/INS integrated system acquiring superior performance.

关键词： GPS INS information fusion integrated navigation federal Kalman filter

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含无限刚性体的杆系内力的一种新的计算方法

力学季刊 2009年第2期30卷 210-215页

作者：吴耀鹏聂国华王勇同济大学航空航天与力学学院上海200092 华南理工大学建筑学院广州510641

含无限刚性体的杆系内力计算,传统解法是将拉压或弯曲无限刚度近似用有限大值来代替,通过数值计算确定杆系内力。计算表明,当刚度取值足够大值时,经常会造成方程组的病态而严重影响求解精度。本文提出一种精确解法,即通过引入无限刚度... 详细信息

含无限刚性体的杆系内力计算,传统解法是将拉压或弯曲无限刚度近似用有限大值来代替,通过数值计算确定杆系内力。计算表明,当刚度取值足够大值时,经常会造成方程组的病态而严重影响求解精度。本文提出一种精确解法,即通过引入无限刚度杆刚性约束方程来避免病态方程等问题,从而保证了计算的有效性和精确度。本文具体对具有拉压和弯曲无限刚度杆系单元建立了相应的约束方程,并针对工程中典型的支座形式:铰支座、滚轴支座和斜向支座给出了约束条件。作为一个具体应用,本文对于一平面刚架结构,利用建立的约束方程并通过确定结点定位向量和单元定位向量,最终获得了结构内力。算例结果表明,本文方法适用于分析含无限刚性体的杆系内力。

关键词：无限刚度精确解法约束方程非独立位移位移相关系数

非共晶相变材料应用于太阳能吸热蓄热器的数值分析

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太阳能学报 2004年第2期25卷 195-199页

作者：侯欣宾袁修干李劲东航天五院总体专业技术部北京100086 北京航空航天大学飞行器与应用力学系北京100083

通过计算分析发现对于目前的吸热蓄热器结构,采用相变发生在一个温度区间的非共晶熔盐混合物作为相变材料可以较好的提高吸热蓄热器的整体性能。主要表现在明显地提高相变材料的利用率、减小换热管工质出口温度波动、减小容器表面最大... 详细信息

通过计算分析发现对于目前的吸热蓄热器结构,采用相变发生在一个温度区间的非共晶熔盐混合物作为相变材料可以较好的提高吸热蓄热器的整体性能。主要表现在明显地提高相变材料的利用率、减小换热管工质出口温度波动、减小容器表面最大温度及容器表面温度变化,经过合理的设计还可以减小整体系统的质量。分析结果可以作为吸热器设计的参考。

关键词：太阳能热发电相变材料蓄热热分析