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Chinese Chemical Letters 1992年第7期3卷 547-550页

作者： Wei Qun DEnG, Jin Fa YAnG Fujian Geological Analysis and testing Research Center,Fuzhou,350002 Yun DEnG department of Chemical engineering, university of Waterloo, canada n2L 3GI

A simple model of chromatographic mechanical mechanism is present, and then a scrics of theoretical chromatographic equations and fundamental Formulae are derived. these theoretical equations and formulae not only reserve thermodynamic characteristics in the current fundamental chromatographic formulae, but also introduce one or more kinetic parameter, so it is possible to make the macroscopic-control on the effect of kinetic characteristics on chromatographic system.

关键词： MODELLInG OF mechanical MECHAnISM OF CHROMAtOGRAPHIC SYStEM AnD tHEOREtICAL EQUAtIOnS SHOWInG DYnAMICAL CHARACtERIStICS OF CHROMAtOGRAPHY 月山

Progress in Bio-manufacturing

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Science Foundation in China 2007年第1期15卷 14-19页

作者： Yan Yongnian~(1,2) Wang Xiaohong~(1,2) Xiong Zhuo~(1,2) Liu Haixia~(1,2) Li Shengjie~(1,2) 1 Key Laboratory for Advanced Materials Processing technology, Ministry of Education & Center of Bio- manufacturing engineering, department of mechanical engineering,tsinghua university, Beijing 100084, P.R. China 2 Institute of Life Science & Medicine, tsinghua university, Beijing 100084, P.R. China Key Laboratory for Advanced Materials Processing technology Ministry of Education & Center of Bio-manufacturing Engineering Department of Mechanical EngineeringTsinghua University Beijing 100084 P.R. China Institute of Life Science & Medicine Tsinghua University Beijing 100084 P.R. China

In this paper we made a thorough and system- atic expatiation of the definition,connotation and composition of *** on the dif- ferent development stages and process of bioengi- neering,its main research direction and correspond- ing researches were ***,from the viewpoint of disciplinary crossing,integration and development,the main technological develop- ment direction of bio-engineering in the coming years was pointed out.

关键词： bio-manufacturing organ cell assem-bling tissue engineering

Analysis of a piezoelectric screw dislocation inside an elliptical inhomogeneity with confocal rigid line in piezoelectric material

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theoretical & Applied Mechanics Letters 2011年第6期1卷 10-13页

作者： Chunzhi Jiang,1,2,3, ) Chao Xie,1,2 Youwen Liu,1,2 and Xin Zeng1,2 1)State Key Laboratory of Advanced Design and manufacturing for Vehicle Body, Hunan university, Changsha 410082, China 2)College of mechanical and Vehicle engineering, Hunan university, Changsha 410082, China 3)department of Physics and Electronic Information engineering, Xiangnan university, Chenzhou 423000, China department of Physics and Electronic Information engineering Xiangnan University Chenzhou 423000 China

this paper deals with the electro-elastic coupling interaction between a piezoelectric screw dislocation which is located inside the elliptical inhomogeneity and an electrically conductive confocal rigid line under remote anti-plane shear stresses and in-plane electrical loads in piezoelectric composite material. the analytical-functions of the complex potentials, stress fields and the image force acting on the piezoelectric screw dislocation are obtained based on the principle of conformal mapping, the method of series expansion, the technical of analytic continuation and the analysis of singularity of complex potentials. the rigid line and the piezoelectric material property combinations upon the image force and the equilibrium position of the dislocation are discussed in detail by the numerical computation.

关键词： complex variable method rigid line piezoelectric material piezoelectric screw dislocation elliptical inhomogeneity

LAttICE BGK MODEL SIMULAtIOn OF ASYMMEtRIC FLOW InSIDE A COntInUOUS SLAB CAStInG MOLD

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Journal of Hydrodynamics 2006年第4期18卷 431-435页

作者： ZHAnG Xiao-jun SHEn Hou-fa Key Laboratory for Advanced manufacturing by Materials Processing technology Department of Mechanical Engineering Tsinghua University Beijing 100084 China

the incompressible lattice Bhatnager-Gross-Krook （BGK） model of computational fluid dynamics, from which the unsteady incompressible navier-Stokes equations can be exactly derived with the limit of small Mach number, was established in continuous casting mold. An asymmetric flow pattern in the two-dimensional central plane of continuous slab casting mold was simulated, and the flow pattern is not stationary but changes over frequently if the Reynolds number is larger than 3000 or so. the results are found to be in excellent agreement with previous experimental results.

关键词： lattice Bhatnager-Gross-Krook (BGK) method incompressible navier-Stokes equation continuous slab casting mold

Plastic deformation behavior of Fe_(40)ni_(40)P_(14)B_6 bulk metallic glass investigated by nanoindentation

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International Journal of Minerals,Metallurgy and Materials 2007年第S1期15卷 68-72页

作者： Changqing Zhang and Kefu Yao Key Laboratory for Advanced manufacturing by Materials Processing technology, department of mechanical engineering, tsinghua university, Beijing 100084, China

Fe40ni40P14B6 bulk metallic glass rods have been prepared by water quenching the fluxed alloy. the deformation behavior was investigated by nanoindentation tests and compressing tests. the average hardness and elastic modulus of the as-prepared Fe40ni40P14B6 BMG (bulk metallic glass) measured by nanoindentation tests are 8.347 and 176.61 GPa respectively. the displace- ment-load curve shows “pop-in” characteristics which correspond to the loading rate bursts. Many shear bands around the indent were observed. the as-prepared Fe-based BMG exhibits a compressive plastic strain of 5.21%, which is much larger than that of other Fe-based glassy alloys and most of other BMGs.

关键词： Fe40ni40P14B6 bulk metallic glass nanoindentation tests compressing tests, "pop-in" characteristics, shear bands, com- pressive plastic strain

Finite Element Analysis for Grinding and Lapping of Wire-sawn Silicon Wafers

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Finite Element Analysis for Grinding and Lapping of Wire-saw...

Chaotic Characteristics of nC table based on Phase Space Reconstruction

第十届国际制造工程与管理会议

作者： Wenjie LIU Z J PEI X J XIn(1. department of mechanical and nuclear engineering Kansas State university 2. department of Industrial and manufacturing Systems engineering Kansas State university USA)

＜正＞ Silicon wafers are the most widely used substrates for semiconductors. the falling price of silicon wafers has created tremendous pressure on silicon wafer manufacturers to develop cost-effective manufacturing processes. A critical issue in wafer production is the waviness induced by wire sawing. If this waviness is not removed, it will affect wafer flatness and semiconductor performance. In practice, both lapping and grinding have been used to flatten wire-sawn wafers. Although grinding is not as effective as lapping in removing waviness, it has many other advantages over lapping （such as higher throughput, fully automatic, and more benign to environment） and has great potential to reduce manufacturing cost of silicon wafers. this paper presents a finite element analysis （FEA） study on grinding and lapping of wire-sawn silicon wafers. An FEA model is first developed to simulate the waviness deformation of wire-sawn wafers in grinding and lapping processes. It is then used to explain how the waviness is removed or reduced by lapping and grinding and why the effectiveness of grinding in removing waviness is different from that of lapping. Furthermore, the model is used to study the effects of various parameters including active-grinding-zone orientation, grinding force, waviness wavelength, and waviness height on the reduction and elimination of waviness. Finally, the results of pilot experiments to verify the model are discussed.

关键词： finite element analysis grinding lapping silicon wafer waviness removal

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Chaotic Characteristics of NC Table based on Phase Space Rec...

thermal Flexure Measurement and Inverse Characterization for a tri-layer thin Plate

第二届国际测量仪器与测试自动化学术会议

作者： Wang Linhong~(1 2)Wu Bo~2 (1 department of Mechatronics nanyang Institute of technology China) (2 School of mechanical Science and engineering Huazhong university of Science and technology China)

＜正＞the dynamic properties of nC（numerical Control） table interfere directly with the accuracy and surface quality of work piece machined by CnC（Computer numerical Control） *** space reconstruction is an effective approach used to research dynamic behaviors of a system with measured time *** means of the theory and method of phase space reconstruction,correlation dimension and maximum Lyapunov exponent,dynamic time series measured from nC table are *** characteristic quantities as power spectrum, phase trajectories,correlation dimension and maximum Lyapunov exponent etc are extracted from measured time series. the chaotic characteristic of dynamic properties of nC table is revealed via various *** a judgment can be formed that nC table is a nonlinear dynamic *** research represents a basis for the dynamic system discrimination of CnC machine.

关键词： nC table chaotic characteristic phase-space reconstruction correlation dimension maximum Lyapunov exponent

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实验力学 2011年第5期26卷 540-555页

作者： Alireza Shirazi Ahmad Varvani-Farahani department of mechanical and Industrial engineering Ryerson University

the paper presents a new study on a tri-layer thin *** moiré implemented with an advanced phase unwrapping technique is employed to obtain actual flexural deformation of a real-life plate sample subjected to thermal *** analytical model is re-formulated to provide the plate with global closed-form solutions of the plate deflection as well as the interfacial stress and *** the measurements and the solutions available,an inverse iterative approach is developed to evaluate and maximize the correlation between the measured and the predicted thermal flexure,leading to ascertained materials' constitutive and thermal *** inverse search algorithm starts with estimated ranges of material property parameters and progressively updates them to finally approach the respective true *** established model solutions along with the optimized material properties matrix enable an accurate evaluation of the interfacial stresses/strains for the specific plate sample.

关键词：英文摘要内容介绍编辑工作期刊

the simulation of ultrasonic beams with a Gaussian beam equivalent point source model

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Chinese Journal of Acoustics 2010年第2期29卷 97-106页

作者： SCHMERR L W HUAnG R SEDOV A Center for nDE Iowa State University Ames department of mechanical engineering Lakehead university thunder Bay

Point Sources and Gaussian beams are used frequently as fundamental building blocks for developing ultrasonic beam models. Both these models have different weaknesses that limit their effectiveness. Here, we will show that one can develop a Gaussian Beam Equivalent Point Source （GBEPS） model that removes those weaknesses and combines the accuracy and versatility of the point source models with much of the speed and well-behaved nature of Gaussian beam models. We will demonstrate the efficiency and versatility of this new GBEPS model in simulating the beams generated from ultrasonic phased arrays, using as few as one Gaussian beam per element of the array. A single element GBEPS model will be shown to be as accurate as a point source model even when substantial beam focusing or steering is present in the array or where the array beam is transmitted through an interface. At the same time the GBEPS model will be shown to be several orders of magnitude faster than the point source model.

关键词： the simulation of ultrasonic beams with a Gaussian beam equivalent point source model very exp