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ANALYSIS OF PULSATILE FLOW IN THE PARALLEL-PLATE FLOW CHAMBER WITH SPATIAL SHEAR STRESS GRADIENT

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Journal of Hydrodynamics 2007年第1期19卷 113-120页

作者： QIN Kai-rong HU Xu-qu LIU Zhao-rong Department of engineering Mechanics Shanghai Jiaotong University Shanghai 200240 China Institute of Biomechanics Fudan University Shanghai 200433 China

The Parallel-Plate Flow Chamber （PPFC）, of which the height is far smaller than its own length and width, is one of the main apparatus for the in-vitro study of the mechanical behavior of cultured vascular Endothelical Cells （ECs） exposed to fluid shear stress. The steady flow in different kinds of PPFC has been extensively investigated, whereas, the pulsatile flow in the PPFC has received little attention. In consideration of the characteristics of geometrical size and pulsatile flow in the PPFC, the 3-D pulsatile flow was decomposed into a 2-D pulsatile flow in the vertical plane, and an incompressible plane potential flow in the horizontal plane. A simple method was then proposed to analyze the pulsatile flow in the PPFC with spatial shear stress gradient. On the basis of the method, the pulsatile fluid shear stresses in several reported PPFCs with spatial shear stress gradients were calculated. The results were theoretically meaningful for applying the PPFCs in-vitro, to simulate the pulsatile fluid shear stress environment, to which cultured ECs were exposed.

关键词： Pulsatile flow fluid shear stress spatialshear stress gradient parallel-plate flow chamber culturedendothelial cells cell mechanics

Crystallization Growth of Single Crystal Cu by Continuous Casting

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Journal of Materials science & Technology 2000年第3期16卷 345-347页

作者： Zhenming XU and Jianguo LI (School of Materials science and engineering, shanghai jiaotong university, shanghai 200030, china) Hengzhi FU (State Key Laboratory of Solidification Processing, Northwestern Polytechnical university, Xi’an 710072, china) School of Materials science and engineering Shanghai Jiaotong University Shanghai 200030 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China

Crystallization growth of single-crystal Cu by continuous casting has been investigated using self-designed horizontal continuous casting equipment and XRD. Experimental results showed that the crystallization plane of (311), (220) and (ill) were eliminated sequentially in evolutionary process. The final growth plane of crystal was (200), the direction of crystallization was [100], the growth direction of both sides of the rod inclined to axis, and the degree of deviation of direction [100] from the crystal axis was less than 10°. In order to produce high quality single crystal, the solid-liquid interface morphology must be smooth, even be planar.

关键词： Crystallization Growth of Single Crystal Cu by Continuous Casting Cu

Computational neuroscience in china

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science china(Life sciences) 2010年第3期53卷 385-397页

作者： WU Si1 & LIANG PeiJi2 1Institute of Neuroscience,shanghai Institutes for Biological sciences,State Key Laboratory of Neurobiology,Chinese Academy of sciences,shanghai 200031,china 2Department of Biomedical engineering,shanghai jiaotong university,shanghai 200240,china Institute of Neuroscience Shanghai Institutes for Biological Sciences State Key Laboratory of Neurobiology Chinese Academy of Sciences Shanghai China Department of Biomedical engineering Shanghai Jiaotong University Shanghai China

The ultimate goal of Computational Neuroscience(CNS) is to use and develop mathematical models and approaches to elucidate brain *** is a young and highly multidisciplinary *** heavily interacts with experimental neuroscience and such other research areas as artificial intelligence,robotics,computer vision,information science and machine *** paper reviews the history of CNS in china,its current status and the prospects for its future *** of CNS research in china are also presented.

关键词： computational neuroscience experimental neuroscience artificial intelligence

Automatic Software Install/Update for Embedded Linux

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Journal of shanghai jiaotong university(science) 2008年第1期13卷 107-109页

作者：陶莉黄佩伟 Department of Electronic engineering Shanghai Jiaotong University

Linux has a special feature of automount in the Linux kernel. Filesystem can be mounted and unmounted automatically. Its performance is similar to MS Windows. It works well under demands of more saving resources and automatization, like memory of system. An approach to install/update software automatically on embedded platform was proposed. This approach derives from above feature based on embedded environment with Linux OS. Configurations of files related to this feature were introduced. An example in practice was given to realize this approach from universal serial bus (USB) memory disk when USB disk is available.

关键词： automount universal serial bus (USB) disk autofs automisc autorun.sh install.shf

Computation of the Viscous Hydrodynamic Forces on a KVLCC2 Model Moving Obliquely in Shallow Water

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Journal of shanghai jiaotong university(science) 2009年第2期14卷 241-244页

作者：王化明邹早建田喜民 School of Naval Architecture Ocean and Civil EngineeringShanghai Jiaotong University State Key Laboratory of Ocean engineering Shanghai Jiaotong University

The viscous hydrodynamic force and moment on ships moving obliquely in shallow water are important for ship navigation *** the paper,the viscous flow field around a KVLCC2 model moving obliquely in shallow water is simulated and the hydrodynamic drag,lateral force and yaw moment acting on the hull are obtained by a general purpose computational fluid dynamics(CFD) package FLUENT with shear-stress transport(SST) k—ωturbulence *** numerical computation is performed at different drift angels and water *** numerical results are compared with experimental results,and a good agreement is demonstrated.

关键词： oblique motion shallow water viscous flow hydrodynamic forces numerical simulation

Annealing High Resistivity CdZnTe Wafers under Controlled Cd/Zn Partial Pressures

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Journal of Materials science & Technology 2004年第6期20卷 703-706页

作者： Wanwan LI, Wenbin SANG, Bin ZHANG, Jiahua MIN and Fang YUSchool of Material science and engineering, Jiading Campus, shanghai university, shanghai 201800, chinaInstitute of Composites Materials, shanghai Jiao Tong university, shanghai 200030, china Sch. of Mat. Sci. and Eng. Shanghai Univ. Shanghai 201800 China Inst. of Composites Mat. Shanghai Jiaotong Univ. Shanghai 200030 China

In order to improve the performances of CdZnTe 7-ray detector, it is key issue to get the crystal with high quality. Equilibrium partial pressures, pCd and pZn, over Cd1-xZnx melt were estimated based on thermodynamic relationship and then Cd0.9Zn0.1Te wafers were annealed under controlled Cd/Zn partial pressures provided by Cd1-xZnx alloy reservoir. The experimental results show that when CdZnTe wafers are annealed under the equilibrium partial pressures provided by Cd0.99Zn0.01 alloy reservoir for 5 days or more at 1073 K, the resistivity of the wafer can be raised by 6 times and IR transmittance raised by 10% or more, the size and density of Te precipitates are greatly reduced. Moreover, losing of Zn from the surface can be avoided, which Ieads to improvement of the Zn radial distribution. In addition, the relationship between the electrical performances of the wafers and different controlled pressures is also discussed.

关键词： CdZnTe annealing Partial pressures over Cd_1-xZn_x γ-ray detector

An Efficient Threshold Key-Insulated Signature Scheme

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Journal of shanghai jiaotong university(science) 2011年第6期16卷 658-662页

作者：陈剑洪龙宇陈克非王永涛李祥学 Department of computer science and engineering Shanghai Jiaotong University School of computer engineering Huaiyin Institute of Technology shanghai Key Laboratory of Scalable Computing and System Shanghai Jiaotong University Department of computer science and Technology East China Normal University

To tackle the key-exposure problem in signature settings,this paper introduces a new cryptographic primitive named threshold key-insulated signature(TKIS) and proposes a concrete TKIS *** a TKIS system,at least k out of n helpers are needed to update a user's temporary private *** the one hand,even if up to k 1 helpers are compromised in addition to the exposure of any of temporary private keys,security of the non-exposed periods is still *** the other hand,even if all the n helpers are compromised,we can still ensure the security of all periods as long as none of temporary private keys is *** with traditional key-insulated signature(KIS) schemes,the proposed TKIS scheme not only greatly enhances the security of the system,but also provides flexibility and efficiency.

关键词： threshold key-insulation signature random oracle model

Rietveld Quantitative Analysis of Carbides Precipitation in Normalized-tempered 2.25Cr-1Mo-0.25V Steel

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Journal of Wuhan university of Technology(Materials science) 2009年第6期24卷 922-926页

作者：张永涛张汉谦 School of Materials science and engineering Shanghai Jiaotong University Research Institute Baoshan Iron & Steel Co.Ltd.

The quantitative determination of the mass fractions of precipitates in steels is very difficult using traditional materials characterization techniques. The Rietveld full-pattern fitting algorithm was introduced to solve this problem. The precipitated multicomponents’ mass fraction of M3C, MC, M7C3 and M23C6 were evaluated precisely and relatively quickly. It is found evolution of carbides apparently occurs during tempering at high temperatures, and a two-step transformation mechanism is proposed for M7C3 during early tempering treatment. The method is an effective way on the investigation of precipitation kinetics, which may play a promising role in propertities’ enhancement and design of the heat-resistant steels.

关键词： 2.25Cr-1Mo-0.25V steel rietveld quantitative analysis precipitates

NUMERICAL SIMULATION OF HEATING AND QUENCHING PROCESSES FOR A 280 CONNECTING ROD OF 16V280ZJ DIESEL LOCOMOTIVE

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Acta Metallurgica Sinica(English Letters) 2002年第6期15卷 561-568页

作者： J.S. Ye, Z.R. Ye, A. Yang,and Y.LuaSchool of Materials science and engineering, shanghai jiaotong university, shanghai 200030, china Ziyang Internal-Combustion Factory of Sichuan, Ziyang 641000, china Sch. of Mat. Sci. and Eng. Shanghai Jiaotong Univ. Shanghai 200030 China Ziyang Internal-Combustion Factory Ziyang 641000 China

A modified temperature-phase transformation-stress coupled 3D non-linear mathematical model and a series of subroutines on the non-liner MARC (MARC Analysis Research Corporation) are developed. Then this modified model has been utilized to simulate the heat treatment processes of 280 connecting rod of 16 V280ZJ diesel locomotive. The simulation results are basically in agreement with the experiments, which testify that the mathematical model and method are feasible. In addition, the simulation can not only obtain the transient temperature and micro structure of heat treatment process, but also provide a sound scientific basis for the heat treatment workers.

关键词： non-linear transient temperature phase transformation mathematical model