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Analysis of residual stress distribution along interface asperity of thermal barrier coating system on macro curved surface

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Progress in Natural science:Materials International 2011年第3期21卷 262-267页

作者： Ming SONG,Yue MA,Sheng-kai GONG Key Laboratory of Aerospace Materials and Performance(Ministry of Education), School of Materials science and engineering,Beihang {2.,Beijing 100191,china Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing 100191 China

Based on the study of the radial residual stress distribution on the macro curved interfaces of thermal barrier coating system(TBCs) for the hollow curved substrate structures,the hollow four-concentric-circle model was *** the concentric-circle model with a fine scaled sinusoidal interface was proposed to describe the stresses distribution on the rough interface of TBCs with macro curved *** influences of the geometric and thermophysical parameters were discussed by the developed *** results showed that the radial stress on the rough interface can be separated into two sections:the overall level stress from macro surface curvature and the local stress from local asperity of the *** overall level stress was determined by the thicknesses and the thermophysical parameters of each *** has been found that the ratio of local stress and overall level stress was influenced by the interface asperity,the ratio of elastic modulus and the ratio of thermal expansion coefficients of the layers beside the rough ***,the convex macro curvature of the substrate can induce tensile stress onto the *** at the sharp corners of the substrate,the small curvature radius can cause high stress which should be taken more care about the occurrence of spalling cracking at interface

关键词： barrier coating system(TBC) residual stress interface asperity thermal grown oxide(TGO) concentric-circle model

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混凝土框架结构非线性静力分析的随机模拟

同济大学学报（自然科学版） 2003年第4期31卷 389-394页

作者：丁光莹李杰同济大学建筑工程系上海200092

考虑结构材料本构模型参数的随机性 ,利用非线性Push over随机模拟方法对混凝土框架结构进行了非线性静力反应的随机模拟分析 .研究结果表明 :混凝土本构模型中的参数随机性对混凝土结构不同力学指标的反应进程均有十分显著的影响 .

关键词：混凝土框架结构非线性静力分析本构模型非线性Push-over随机模拟结构反应

WELDABILITY OF Cu-W ALLOY AND COPPER USING FRICTON WELDING METHOD

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中国有色金属学会会刊：英文版 1995年第3期5卷 136-139页

作者： Hou, Saizhang Liu, Ximing (Department of Materials science and engineering,Central South {2. of Technology, Changsha 410083) Central South Univ of Technology Changsha China

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ＷＥＬＤＡＢＩＬＩＴＹＯＦＣｕ－ＷＡＬＬＯＹＡＮＤＣＯＰＰＥＲＵＳＩＮＧＦＲＩＣＴＯＮＷＥＬＤＩＮＧＭＥＴＨＯＤ￥Ｈｏｕ，Ｓａｉｚｈａｎｇ；Ｌｉｕ，Ｘｉｍｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ｃ...

关键词： Cu-W alloy friction welding weldability orthogonal method

Primary Research of MSCs on AW Glass Ceramic with Different Surface Roughness

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生物医学工程学杂志 2005年第S1期22卷 139-140页

作者： Yan-Juan TANG~1 Qiao-Feng WU~1 Huai-Qing CHEN~(1△) Da-Li ZHOU~2.(Biomedical Tissue engineering of West china Medical Center,Sichuan {2., Chengdu 610041,china)2.School of Materials science and engineering,Sichuan {2.,Chengdu 610041,china) Biomedical Tissue engineering of West china Medical Center Sichuan University Chengdu 610041 China School of Materials science and engineering Sichuan University Chengdu 610041 China

1 IntroductionTissue engineering can be defined as the use of composite of cells and materials to promote a replace new tissue formation. The surface topography of the composite including surface texture and surface roughness, can directly influence cellular adsorb, attachment, proliferation differentiation and migradtion. Roughened surfaces were achieved through processes such as machining, particle blasting, chemicaL/electrochemical etching.

关键词： MSCs Primary Research of MSCs on AW Glass Ceramic with Different Surface Roughness

The cloning of 3'-truncated preS/S gene from HBV genomic DNA and its expression in transgenic mice

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World Journal of Gastroenterology 2000年第5期6卷 734-737页

作者： Yi Ping Hu~1 Yu Cheng Yao~1 Jian Xiu Li~1 Xin Min Wang~1 Hong Li~2.Zhong Hua Wang~1 Zhang Heng Lei~3 1 Department of Cell Biology,Second Military Medical university,shanghai 2.0433,{2. 2.Department of Biology,Department of Basic Medicine,West-{2. university of Medical sciences,Chengdu 610041,{2. 3 Department of Biology,North Sichuan Medical College,Nanchong 637007,{2. 第二军医大学上海华西医科大学四川成都川北医学院四川

INTRODUCTIONHepatitis B virus (HBV) is regarded as one of themain etiologic factors involved in the developmentof human hepatocellular carcinoma (HCC).The open reading frame (orf)of X gene of HBVencoded a transactivating factor is the evidence thatstrongly supported the notion that the X gene ofHBV DNA integrated in HCC genomic DNA couldcontribute to the carcinogenesis of liver cells byactivation of some related cellular genes

关键词： hepatitis B virus gene expression mice transgene polymerase chain reaction DNA recombinant hepatoma

Electroless Co-Zn Surface-Modified Nickel Hydroxide as an Active Material for Pasted Nickel Electrodes

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Transactions of Tianjin university 2004年第1期10卷 47-53页

作者：宋全生唐致远郭鹤桐 CHAN S LI School of Chemical engineering and Technology Tianjin University School of Materials science and engineering University of New South WalesSydney

Chemically precipitated β type nickel hydroxide powder was surface modified by electroless deposition of Co Zn coatings,and physical properties of both the modified and unmodified nickel hydroxide were characterized by scanning electron microscopy (SEM), specific surface area (BET), X ray diffraction (XRD) and X ray photoelectron spectroscopy (XPS). It has been found that Co and Zn components of the surface electroless coatings exist in the oxidized state. Electrochemical performances of pasted nickel electrodes using the modified nickel hydroxide as an active material were investigated, and compared with those of the electrodes prepared with the unmodified nickel hydroxide. Charge/discharge tests show that the modified nickel hydroxide electrodes exhibit better performances in the charge efficiency, specific discharge capacity and active material utilization. Their resistance to swelling with cycling is also superior to that of the unmodified nickel hydroxide electrodes. Cyclic voltammetric (CV) studies indicate that the modified electrodes have a higher electrochemical activity, and the porous pasted nickel electrodes have some distinguished CV characteristics in comparison with those of the thin film nickel electrodes.

关键词： nickel hydroxide surface modification electroless deposition of Co Zn pasted nickel electrodes electrochemical performances

一种针对减格矢量预编码的可调量化误差校正方法

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上海交通大学学报 2009年第7期43卷 1155-1160页

作者：耿烜蒋铃鸽何晨上海交通大学电子信息与电气工程学院上海200240

基于减格矢量预编码的量化误差问题,提出了一种可调量化误差校正方法.通过大量仿真实验发现,在减格矢量预编码中量化误差数目的概率分布是有规律的,利用实际量化误差数目的概率分布规律,通过设定不同的调节值控制量化误差校正的数目,获... 详细信息

基于减格矢量预编码的量化误差问题,提出了一种可调量化误差校正方法.通过大量仿真实验发现,在减格矢量预编码中量化误差数目的概率分布是有规律的,利用实际量化误差数目的概率分布规律,通过设定不同的调节值控制量化误差校正的数目,获得一种可调的误差校正方法.仿真表明,该方法在量化误差校正中,能够取得性能和复杂度的折衷.

关键词：多输入多输出减格矢量预编码可调量化误差校正

Gas Turbulence Modulation Model for Gas-Solid Flows in Two-Fluid Approach

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Journal of shanghai Jiaotong university({2.) 2010年第4期15卷 428-433页

作者：曾卓雄潘阳周力行 Aircraft engineering College Nanchang Hangkong University School of Civil engineering and Architecture East China Jiaotong University Department of engineering Mechanics Tsinghua University

Turbulence enhancement by particle wake effect is studied by numerical simulation of gas turbulent flows passing over particle under various particle sizes, inlet gas velocities, gas viscosity, gas density and the distance of particles. By performing dimension analysis and using the form of gas-particle interaction source term for reference, a new semi-empirical turbulence enhancement model by the particle-wake effect is proposed. The turbulence model is then incorporated into second-order moment model for simulating gas-particle flows in a horizontal channel with different wall roughness and a sudden-expansion chamber. The results show that this model is with higher calculating accuracy than another two turbulence models in comparison with the experimental results.

关键词： gas-particle flows turbulence modulation particle wake effect

Computer Simulation of the Continuous Annealing Recrystallization for Cold-Rolled Strip in Galvanizing Line

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Journal of shanghai Jiaotong university({2.) 2011年第3期16卷 352-355页

作者：贺俊光文九巴周旭东李旭东 School of Materials science and engineering Henan {2. of science and Technology School of Materials science and engineering Lanzhou University of Technology School of Materials science and engineering Lanzhou {2. of Technology

The continuous heating transformation program is developed to investigate the influence of continuous annealing technological parameters on recrystalization for cold-rolled strip in galvanizing *** program can be used for the calculation of the continuous annealing temperature field of strip steel,determination of the start and end time of recrystallization in continuous heating process,and procurement of the continuous heating transformation *** temperature field for continuous annealing is simulated by means of finite difference *** on the Scheil superposition principle,the continuous heating transformation curve is obtained by using time temperature transformation(TTT)curve which is measured *** developed program has been used in practice,and the strip speed on production line increases bv more than 10%.

关键词： computer simulation cold rolling continuous annealing recrystallization continuous heating transformation