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MORPHOLOGY OF MELT SPINNING SUPERSATURATED B2 NiAl

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Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 89-93页

作者： SUN Baode CHE Xiaozhou LIN Dongliang ZHOU Yaohe(department of Materials engineering,shanghai Jiaotong university,shanghai 20030,china)(department of Materials Science,shanghai Jiaotong university,shanghai 200030,china) shanghai Jiaotong Univ Shanghai China

The morphology and structure of melt spinning Ni-33.6at% Al doped with B and RE were *** results show that the alloy consists of L10 martensitic grains and L12 Ni3Al at the grain boundaries when it contains no B and *** addition of 0.11-0.31wt% B can suppress the martensitic transformation and Ni3Al separation at the boundaries,and a supersaturated B2 single phase NiAl is *** addition of 0.05wt% RE can eliminate Ni3Al precipitated at the boundaries and get complete martensite,but 0.2-0.8wt% RE addition can suppress the martensitic transformation, and supersaturated B2 single phase NiAl is *** formation mechanism of supersaturated B2 single phase NiAl has been analyzed.

关键词： NiAl supersaturate morphologl melt spinning

Changes in Autoantibodies against β1-Adrenoceptor and M2-Muscarinic Receptor during Development of Renovascular Hypertension in Rats

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 793-797页

作者： Jian-Ming ZHI*, Rong-Fang CHEN1, Heng WU2, Hui-Rong LIU2, and Rong-Rui ZHAO2 department of Physiology, shanghai Second Medical university, shanghai 200025, china 1department of Toxicology, Second Military Medical university, shanghai 200433, china 2 department of Physiology, Shanxi Medical university, Taiyuan 030001, china department of Physiology Shanghai Second Medical UniversityShanghai 200025 China department of Toxicology Second Military Medical UniversityShanghai 200433 China department of Physiology Shanxi Medical UniversityTaiyuan 030001 China

In an experimental rat’s renovascular hypertension model, we studied the genesis of anti- cardiac β1-adrenoceptor and M2-muscarinic receptor autoantibodies in relation to the changes in immunological function during the development of renal hypertension. The biological activities of these autoantibodies were also examined. It was shown that after two weeks of operation both the frequency of occurrence and the titre of autoantibodies to cardiac β1-adrenoceptor and M2-muscarinic receptor were significantly increased as compared with the control of pre-treatment. The increased autoantibodies lasted for several weeks and then automatically decreased gradually to the pre-clipping level at 10 weeks. Meanwhile the ratio of CD4 /CD8 + + was also undergone an initial increase followed by gradual recovery and correlated well with the changes in antibody titre. The biological effects of these autoantibodies displayed an “agonistic-like” activities on the beating frequency of cultured neonatal cardiomyocyte. It is suggested that autoimmune mechanisms are involved in the pathogenesis of renal hypertension and the cardiac receptor autoantibodies might be one of the mechanisms leading to cardiac dysfunction.

关键词： autoantibody renal hypertension cardiac receptor immunology

Approach of moving boundary and its application in 3D tidal current simulation of Changjiang (Yangtze) River Estuary based on ECOMSED model

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Acta Oceanologica Sinica 2009年第4期28卷 78-85页

作者： KUANG Cuiping SUN Bo LIU Shuguang GU Jie YU Weiwei department of Hydraulic engineering Tongji University Shanghai 200092 China shanghai Ocean university Shanghai 200090 China

Considering three-dimensional model ECOMSED can not simulate wetting-drying of shoal with its fixed boundary, an approach to represent moving boundary in the model is introduced here. This approach smoothly joints the internal and external mode by making use of wetting and drying technique and is verified by a numerical test which presents a good agreement with the previous test results obtained by other researchers. A three dimensional numerical model is established to simulate the hydrodynamics in spring tide in the Changjiang （Yangtze） River estuary by this modified ECOMSED model which is also validated through the observed field data, the simulation presents a good periodic tidal change. It also successfully simulates the tidal current of computational areas and reproduces the tidal flat intermittent appearance.

关键词： ECOMSED moving boundaries test with variable slope Changjiang (Yangtze) River Estuary 3D tidal numerical model

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运用惰性点方法反算沥青路面结构地基模量

同济大学学报（自然科学版） 2004年第1期32卷 39-42页

作者：张小宁孙立军同济大学交通工程系上海200092 同济大学道路与机场工程系上海200092

在水泥混凝土路面中存在的路面弯沉盆惰性点,可以用于反算水泥混凝土路面结构模量.为此论证了惰性点在沥青路面弯沉盆中的存在性,并利用惰性点方法开发出一套反算沥青路面结构地基模量的程序.首先论证典型的沥青路面3层体系可以简化为2... 详细信息

在水泥混凝土路面中存在的路面弯沉盆惰性点,可以用于反算水泥混凝土路面结构模量.为此论证了惰性点在沥青路面弯沉盆中的存在性,并利用惰性点方法开发出一套反算沥青路面结构地基模量的程序.首先论证典型的沥青路面3层体系可以简化为2层体系,在此2层体系中存在惰性点.然后,通过回归分析方法得出了路面结构信息与惰性点参数的相关关系.最后通过此关系,可以在实测弯沉盆中找到惰性点,并求解地基模量.

关键词：沥青路面模量反算惰性点弯沉盆

Genesis,Distribution and engineering Characteristics of Recently Deposited Silts in Huaibei Plain,Anhui Province

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地学前缘 2009年第S1期16卷 243-244页

作者： Daoxiang Wu,Zhihai Wu,Guojun Shi,Guoqiang Wang 1.department of geotechnical engineering,tongji university,shanghai 200092,china. 2.School of Resources & Environmental engineering,Hefei university of Technology,Hefei 230009,china

There are two different genetic types of recently deposited silts widely distributing in Huaibei Plain of Anhui Province:flooding deposited silt of Yellow River and Huaihe *** recently deposited silts have the followi... 详细信息

关键词： recently deposited silt engineering geological characteristics bearing capacity Huaibei Plain

PROPERTIES OF NATURAL CAVITATION FLOWS AROUND A 2-D WEDGE IN SHALLOW WATER

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Journal of Hydrodynamics 2011年第6期23卷 730-736页

作者： CHEN Xin LU Chuan-jing LI Jie CHEN Ying department of engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China department of engineering Mechanics and State Key Laboratory of Ocean engineering Shanghai Jiao Tong University Shanghai 200240 China

When a body navigates with cavity in shallow water, both flexible free surface and rigid bottom wall will produce great influences on the cavity shape and hydrodynamic performances, and further affect the motion attitude and stability of the body. In the present work, characteristics of the natural cavitating flow around a 2-D symmetrical wedge in shallow water were investigated and the influences of two type boundaries on the flow pattern were analyzed. The Volume Of Fluid （VOF） multiphase flow method which is suitable for free surface problems was utilized, coupled with a natural cavitation model to deal with the mass-transfer process between liquid and vapor phases. Within the range of the cavitation number for computation （0.07-1.81）, the cavity configurations would be divided into three types, viz., stable type, transition type and wake-vortex type. In this article, the shapes of the free surface and the cavity surface, and the hydrodynamic performance of the wedge were discussed under the conditions of relatively small cavitation number （〈0.256）. The present numerical cavity lengths generally accord with experimental data. When the cavitation number was decreased, the cavity was found to become longer and thicker, and the scope of the deformation of the free surface also gradually extends. The free surface and the upper cavity surface correspond fairly to their shapes. However, the lower side of the cavity surface was rather leveled due to the influence of wall boundary. The lift and drag coefficients of this 2-D wedge basically keep linear relations with the natural cavitation number smaller than 0.157, whereas direct proportion for drag and inverse proportion for lift.

关键词： shallow water natural cavitation boundary effect multiphase flow

NUMERICAL SIMULATION OF MORPHOLOGY OF POLYMER CHAIN COILS IN COMPLEX FLOWS

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Chinese Journal of Polymer Science 2005年第5期23卷 453-462页

作者： Hong Zheng Wei Yu Chi-xing Zhou department of Polymer Materials Science & engineering,shanghai Jiaotong university,shanghai 200240,china shanghai Jiao Tong Univ Dept Polymer Mat Sci & Engn Shanghai 200240 Peoples R China

A new coupled finite element formulation is proposed to calculate a conformation tensor model in two complex flows： a planar contraction flow and a planar flow around a symmetrically placed cylinder. The components of conformation tensor are first computed together with the velocity and pressure to describe the change of morphology of polymer chain coils in flow fields. Macroscopic quantities of viscoelastic flow are then calculated based on the conformation tensor. Comparisons between the numerical simulations and experiments for stress patterns and velocity profiles are carried out to prove the validity of the method.

关键词： Viscoelastic flow Morphology Complex flows Conformation tensor model Finite element method (FEM).

WATER TUNNEL EXPERIMENTAL INVESTIGATION ON THE DRAG REDUCTION CHARACTERISTICS OF THE TRAVELING WAVY WALL

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Journal of Hydrodynamics 2011年第1期23卷 65-70页

作者： YAO Yan LU Chuan-jing SI Ting ZHU Kun department of engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China Beijing Electromechanic engineering Institute Beijing 100074 China State Key Laboratory of Ocean engineering Shanghai Jiao Tong University Shanghai 200030 China department of modem Mechanics University of Science and Technology of China Hefei 230027 China

Drag reduction experiment of the traveling wavy wall at high Reynolds number is conducted.A suit of traveling wavy wall device is *** drag forces of the traveling wavy wall with various wave speeds（c）are measured under different water speeds（U）in the K15 cavitation water tunnel and are compared with that of the flat *** results show that the mean drag force of the traveling wavy wall have decreased and then increased with oscillation frequency increasing at the same flow *** different flow speeds,when traveling wave wall reached to the minimum of drag force,the corresponding the ratio of the wall motion phase speed c to flow speed U,c /U is slightly *** the parameters of the experiment,whenc /U reaches a certain value,the drag force of the traveling wavy wall can be less than that of the flat *** drag reduction can be up to 42%.Furthermore,as the value ofc /U increases,the traveling wavy wall can restrain the separation and improve the quality of flow field.

关键词： flow control drag reduction traveling wavy wall water tunnel test

Laplacian on Complex Finsler Manifolds

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Chinese Annals of Mathematics,Series B 2011年第4期32卷 507-520页

作者： Jinxiu XIA Tongde ZHONG Chunhui QIU department of Applied Mathematics Tongji University Shanghai 200092 China. School of Mathematical Sciences Xiamen University Xiamen 361005 Fujian China.

In this paper, the Laplacian on the holomorphic tangent bundle T 1,0 M of a complex manifold M endowed with a strongly pseudoconvex complex Finsler metric is defined and its explicit expression is obtained by using the Chern Finsler connection associated with (M, F ). Utilizing the initiated "Bochner technique", a vanishing theorem for vector fields on the holomorphic tangent bundle T 1,0 M is obtained.

关键词： Laplacian Strongly pseudoconvex complex Finsler metric Chern Finsler connection