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Acta Mechanica Solida Sinica 1995年第2期8卷 154-162页

作者： Zou Guiping(shanghai Institute of Applied Mathematics and Mechanics,shanghai University,shanghai 200072,china)Tang Limin(Research Institute of engineering Mechanics,Dalian Uuiversity of Techuology,Dalian 116024,china) shanghai UNIV SHANGHAI INST APPL MATH & MECHSHANGHAI 200072PEOPLES R CHINA DALIAN UNIV TECHNOL ENGN MECH RES INSTDALIAN 116024PEOPLES R CHINA

Through introducing the Laplace transformation in the time direction, the mixed state Hamilton canonical equation and a semi-analytical solution are presented for analyzing the dynamic response of laminated composite plates. This method accounts for the separation of variables, the finite element discretization can be employed in the plane of laminar, and the exact solution in the thickness direction is derived by the state space control method. To apply the transfer matrix method, the relational expression at the top and bottom surface is established. So the general solution in transformation space is deduced by the spot method. By the application of inversion of Laplace transformation, the transient displacements and stresses can be derived.

关键词： HAMILTON CANONICAL EQUATION LAMINATED COMPOSITE PLATE

Homotopy　Analysis　Method:A　New　Analytical　Technique　for　Non-linear　Problems

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Communications in Nonlinear Science and Numerical Simulation 1997年第2期2卷 39-44页

作者： Shijun LIAO (Department of Naval Architecture & Ocean engineering, shanghai Jiao Tong Univ.,shanghai 200030, P. R. china) E-mail: Department of Naval Architecture & Ocean engineering Shanghai Jiao Tong University Shanghai 200030 China

ＨｏｍｏｔｏｐｙＡｎａｌｙｓｉｓＭｅｔｈｏｄ：ＡＮｅｗＡｎａｌｙｔｉｃａｌＴｅｃｈｎｉｑｕｅｆｏｒＮｏｎ－ｌｉｎｅａｒＰｒｏｂｌｅｍｓ１ＳｈｉｊｕｎＬＩＡＯ（ＤｅｐａｒｔｍｅｎｔｏｆＮａｖａｌＡｒｃｈｉｔｅｃｔｕｒｅ... 详细信息

ＨｏｍｏｔｏｐｙＡｎａｌｙｓｉｓＭｅｔｈｏｄ：ＡＮｅｗＡｎａｌｙｔｉｃａｌＴｅｃｈｎｉｑｕｅｆｏｒＮｏｎ－ｌｉｎｅａｒＰｒｏｂｌｅｍｓ１ＳｈｉｊｕｎＬＩＡＯ（ＤｅｐａｒｔｍｅｎｔｏｆＮａｖａｌＡｒｃｈｉｔｅｃｔｕｒｅ＆ＯｃｅａｎＥｎｇｉｎｅｅｒｉｎｇ...

关键词： Nonlinear analytical technique strong nonlinearity homotopy topology

FINE SILT PARTICLE PATHLINE OF DREDGING SEDIMENT IN THE YANGTZE RIVER DEEPWATER NAVIGATION CHANNEL BASED ON EFDC MODEL

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Journal of Hydrodynamics 2010年第6期22卷 760-772页

作者： XIE Rui WU De-an YAN Yi-xin ZHOU Hai College of Harbor Coastal and Offshore Engineering Hohai University Nanjing 210098 China shanghai Institute of Waterways Shanghai 200120 China

Based on the Environmental Fluid Dynamics Code （EFDC）, a three-dimensional baroclinic model for lower reaches of the Yangtze River, Yangtze River Estuary, Hangzhou Bay and the adjacent sea areas was established with the sigma-coordinate in the vertical direction and the orthogonal curvilinear coordinates in the horizontal direction. The fine silt particle tracers were injected during different tides with the calibrated three-dimensional numerical model in the Yangtze River Estuary to simulate the migration tracks of the tracers in the following three days, and thereby study the migration behavior of the fine silt particles of dredged sediment after dumping at different locations in the navigation channel in the Yangtze River Estuary. The study shows that the particle paths of the tracer particles basically migrate to the open sea along the middle axis of river course in the form of reciprocating oscillation, the migration and diffusion directions of tracer particles are basically parallel to the navigation channel in guide levee, similar to long belt distribution, and the tracer particles migrate to the southeast out of the guide levee. The particle which is on the southern and northern sides enter groin and cross the navigation channel in the process of movement, and is easy to deposit in the navigation channel. The migration tracks of the particles released at different layers are basically similar at the same release station, but specifically different, varying at different cross sections. The result can be used for the choice and evaluation of dredging schemes in the Yangtze River Deepwater Navigation Channel.

关键词： deepwater channel EFDC model tracer fine silt particles

Puncturing Period on the Performance of Punctured Turbo Codes

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Wuhan University Journal of Natural Sciences 2002年第3期7卷 319-322页

作者： Xu Heng\|ping, Pan Sheng, Zhao Xun, Rong Meng\|tian Department of Electronic engineering, shanghai Jiaotong University, shanghai 200030, shanghai, china shanghai Jiaotong University Department of Electronic Engineering Shanghai Shanghai China (GRID:grid.16821.3c) (ISNI:***)

Puncturing is the predominant strategy to construct high code rate turbo codes. Puncturing period is a crucial parameter influencing the performance of punctured turbo codes (PTC). Here we developed a new puncturing scheme of turbo codes, with which the puncturing period on the performance of PTC is studied. Consequently, suggestions on selecting the puncturing period are proposed.

关键词： Key words puncturing period puncturing table AWGN turbo codes

Preparation of Superfine-Cemented Carbide by Spark Plasma Sintering

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Journal of Wuhan University of Technology(Materials Science) 2006年第1期21卷 42-45页

作者：解迎芳王兴庆 School of Materials Science and engineering Shanghai University Shanghai 200072 China

92WC-8Co puwder mixture with superfine-tungsten carbide was respectively sintered by spark plasma sintering（ SPS ） and sintering isostutic pressure （SIP）. Complete dense samples with 200 nm WC grains and 94.2HRA hardness were prepared by spark plasma sintering at 1 150 ℃ and under 4.5 kN for 5 minutes. SIP was carried out at 1 400 ℃ for 30 minutes with a result of 300-400 nm WC grains and 93 HRA hardness. The results show that sintering temperature is greatly decreased by SPS, sintering time is largely shortened and WC grain growth is effectively retarded. Micropores and drawb（wks in superfine-cemented carbide made by SPS are greatly declined, which is very useful to improving nwehanical properties.

关键词： spurk plasma sintering cemented carbide superfine grain sintering mechanism

Expert Network for Die Casing Defect Analysis

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Journal of Materials Science & Technology 2003年第4期19卷 320-323页

作者： Jiadi WANG, Yongfeng JIANG, Chen LU and Wenjiang DINGNational engineering Research Center for Light Alloy Net Shaping, shanghai Jiao Tong University, shanghai, 200030, china Ctr. for Light Alloy Net Shaping Shanghai Jiaotong Univ. Shanghai 200030 China

Due to the competition and high cost associated with die casting defects, it is urgent to adopt a rapid and effective method for defect analysis. In this research, a novel expert network approach was proposed to avoid some disadvantages of rule-based expert system. The main objective of the system is to assist die casting engineer in identifying defect, determining the probable causes of defect and proposing remedies to eliminate the defect. 14 common die casting defects could be identified quickly by expert system on the basis of their characteristics. BP neural network in combination with expert system was applied to map the complex relationship between causes and defects, and further explained the cause determination process. Cause determination gives due consideration to practical process conditions. Finally, corrective measures were recommended to eliminate the defect and implemented in the sequence of difficulty.

关键词： Neural network Expert system Die casting Defect analysis Back propagation

Effect of slow monomer addition on molecular parameters of hyperbranched polymers synthesized in the presence of multifunctional core molecules

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Science china Chemistry 2010年第4期53卷 891-897页

作者： ZHOU ZhiPing1, Jia ZhengWei1 & YAN DeYue2 1School of Materials Science and engineering, Jiangsu University, Zhenjiang 212013, china 2State Key Laboratory of Metal Matrix Composites, shanghai Jiao Tong University, shanghai 200240, china 1. School of Materials Science and engineering Jiangsu University Zhenjiang 212013 China2. State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200240 China

This study develops the kinetics for the slow monomer addition technique in the synthesis of hyperbranched polymers. Taking the conversion of monomer (x) as a variable, we derived the analytic expressions of molecular size distribution function, average degree of polymerization, polydispersity index and degree of branching. These expressions are not only amenable to the polymerization with high monomer conversion, but also appropriate to describe the whole polymerization process. Comparison with the one-pot polymerization indicates that the slow monomer addition technique improves the molecular weight distribution and increases the degree of branching for the products obtained.

关键词： hyperbranched polymer kinetics molecular weight distribution polydispersity degree of branching

Chimney Effect Assessment of the Double-skin Facade

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湖南大学学报（自然科学版） 2009年第S1期36卷 146-150页

作者： QIU Zhong-zhu1,LI Peng2,CHOW Tin-tai3,REN Jian-xing1,WANG Wen-huan1(1.School of Energy & Environment engineering,shanghai University of Electric Power,shanghai 20090,china 2.School of Mechanical engineering,Tongji University,shanghai 200092,china 3.Division of Building Science & Technology,City University of Hong Kong,Hong Kong SAR,china) School of Energy and Environment engineering Shanghai University of Electric Power Shanghai 200090 China School of Mechanical engineering Tongji University Shanghai 200092 China Division of Building Science and Technology City University of Hong Kong Hong Kong Hong Kong

The mathematic model of heat transfer through ventilated double glazing was verified with the measured data,which were from a test chamber equipped with glass face temperature,solar radiation,ambient temperature,and wind speed measurement *** the model validation,the double-skin facade assessment was carried out through simulation with ESP-r software integrating thermal simulation and air low net work *** air flow situation in the air gap was analyzed on the basis of the hourly air velocity simulation data within typical winter week,summer week,spring week and autumn *** differences of chimney effect in different seasons were discussed,and the thermal loads resulted from the ventilated and unventilated double skin facade were presented.

关键词： chimney effect assessment double-skin facade

The contribution of cis-regulatory elements to head-to-head gene pairs' co-expression pattern

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Science china(Life Sciences) 2009年第1期52卷 74-79页

作者： HAO Pei1,2,YU Yao2,3,ZHANG XiaoYan4,TU Kang2,FAN HaiWei2 & ZHONG Yang1 1 School of Life Sciences,Fudan University,shanghai 200433,china 2 Bioinformatics Center,Key Lab of systems Biology,shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,shanghai 200031,china 3 shanghai Center for Bioinformation Technology,shanghai 200235,china 4 School of Life Sciences,Tongji University,shanghai 200092,china 1. School of Life Sciences Fudan University Shanghai 200433 China 2. Bioinformatics Center Key Lab of Systems Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China 3. shanghai Center for Bioinformation Technology Shanghai 200235 China 4. School of Life Sciences Tongji University Shanghai 200092 China

Transcription regulation is one of the most critical pipelines in biological process,in which cis-elements play the role as gene expression *** attempt to deduce the principles underlying the co-expression of "head-to-head" gene pairs by analyzing activities or behaviors of the shared cis-elements.A network component analysis was performed to estimate the impact of cis-elements on gene promoters and their activities under different *** discoveries reveal how biological system uses those regulatory elements to control the expression pattern of "head-to-head" gene pairs and the whole transcription regulation system.

关键词： transcription regulation cis-elements "head-to-head" gene pairs

SIMULATION OF BLOOD FLOW IN INTRACRANIAL ICA-PCOMA ANEURYSM VIA COMPUTATIONAL FLUID DYMAMICS MODELING

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Journal of Hydrodynamics 2009年第5期21卷 583-590页

作者： WANG Qing WANG Wei-zhe FEI Zhi-min LIU Ying-zheng CAO Zhao-min School of Mechanical engineering Shanghai Jiao Tong University Shanghai 200240 China Renji Hospital Shanghai Jiao Tong University Shanghai 200001 China

In the present study, hemodynamics of the internal carotid artery-posterior communicating artery （ICA-PComA） was numerically modeled with CFD approach. The steady and pulsating blood flow in the ICA-PComA was simulated. The main concern was placed on the influence of aneurysm geometry on the local hemodynamics by changing the sac diameter and Aspect Ratio （AR） of the aneurysm. The numerical results show the significantly weakened Wall Shear Stress （WSS） and the intensified wall pressure in the aneurysm as AR is increased. Two factors, i.e., low WSS and high pressure of the aneurysm, may play important roles in the fragile change of the aneurysm and the final rupture. The distributions of Time-Averaged WSS （TAWSS）, Oscillatory Shear Index （OSI） and spatial WSS Gradients （WSSG）） were determined and discussed in view of their influences on the evolution of ICA-PComA aneurysm.

关键词： CFD intracranial aneurysm hemodynamics