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EFFECT OF REINFORCEMENT VOLUME FRACTION ON PRECIPITATION IN MATRIX OF SiC_p/AI COMPOSITE

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Acta Metallurgica Sinica(English Letters) 1993年第8期6卷 161-167页

作者： LIN Junshan LI Pengxing WU Renjie shanghai Jiao Tong university,shanghai,china postdoctoral,institute of Composite Materials,shanghai Jiaotong university,shanghai 2.0030,china shanghai Jiaotong Univ Shanghai China

The differential scanning calorimetric(DSC) and transmission electron microanalysis (TEM) techniques were used to study the kinetic process of precipitation in matrix of cast SiC_p/2.2. *** results showed that precipitation reactions of GP zone and intermediate phase S'(Al_2.uMg)in the composites were accelerated compared with SiC-free material,the peak temperatures of both reactions were *** reaction enthalpies of both the GP zone and intermediate phase S' formation in the matrix were substantially decreased after the addition of *** analysis found that the alloying element Mg segregated at the SiC/Al interfaces,and was depleted in the matrix near the *** precipitation-free zones(PFZ) and precipitation-sparse zones(PSZ) formed near the interfaces,as a results,the volume fraction of precipitates in matrix was reduced.

关键词： SiC_p/2.2. composite differential scanning calorimetry precipitation in matrix

HARMONIC FUNCTIONS ON A COMPLETE NONCOMPACT MANIFOLD WITH ASYMPTOTICALLY NONNEGATIVE CURVATURE

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Chinese Annals of Mathematics,Series B 2004年第4期25卷 523-532页

作者： ZHOUCHAOHUI CHENZHIHUA DepartmentofAppliedMathematics TongjiUniversityShanghai200092China.

The authors prove the space of harmonic functions with polynomial growth of a fixed rate on a complete noncompact Riemannian manifold with asymptotically nonnegative curvature is finite dimensional.

关键词： Harmonic function Asymptotically nonnegative curvature Polynomial growth

Trace element geochemistry of the Lower Cambrian black rock series from northwestern Hunan, South china

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Progress in Natural Science:Materials International 2004年第1期14卷 65-71页

作者： PAN Jiayong 1,2. *, MA Dongsheng 1 and CAO Shuanglin 1,2. (1.The State Key Laboratory for Mineral Deposits Research, Nanjing university, Nanjing 2.0093, china 2. East china institute of Technology, Fuzhou 344000, china) Nanjing Univ State Key Lab Mineral Deposit Res Nanjing 210093 Peoples R China E china Inst Technol Fuzhou 344000 Peoples R China

Samples of black rock series collected from the Lower Cambrian Niutitang Formation, northwestern Hunan Province, china, were analyzed for trace elements. The trace element geochemical characteristics of the ore layer (high enrichments of Ni, Mo, V, U, Cu, Pb, Zn, Cd, Tl and Ba; high U/Th ratios and LREE enriched patterns with positive Eu and Y anomalies) support the assumption that the Ni Mo polymetallic layer is of submarine hydrothermal origin. High field strength elements (HFSE) and lithophile elements such as Nb, Ta, Zr, Hf, Li, Be, Rb, Cs, Th and Sc are remarkably higher in the upper unit than those in the lower unit of the Niutitang Formation. These features may reflect that hydrothermal contributions were diminished, and terrigenous constituents were increased in the sediments of the upper unit of the Niutitang Formation.

关键词： black rock series Early Cambrian trace elements northwestern Hunan china

A Jacobi-Eisenstein series of weight two on congruence Jacobi subgroup

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Science china Mathematics 2010年第9期53卷 2405-2410页

作者： LU HongWen & ZHOU HaiGang Department of Mathematics,tongji university,{2. 2.0092.china 1. Department of Mathematics Tongji University Shanghai 200092 China

The specific aims of this paper are to define a Jacobi-Eisenstein series of weight two on congruence Jacobi subgroup and to compute its Fourier expansion coefficients in *** overcome the difficulties that the Jacobi-E... 详细信息

关键词： Jacobi forms Eisenstein series Fourier expansion

Predominant expression of β-chain variable region genes of T-cell receptor in TILs from human renal cell carcinoma

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Chinese Science Bulletin 1997年第8期42卷 693-697页

作者： LI Xueyi, WANG Ying, ZHENG Zhongcheng, ZHANG Dongqing, FUSaili, LING Jianyu and ZHOU Guangyan (CHOU Kuangyen)1. shanghai institute of Immunology, shanghai Second Medical university, shanghai 2.002., china 2. shanghai institute of Biochemistry, Chinese Academy of Sciences, shanghai 2.0031, china 3. shanghai Ruijin Hospital, shanghai 2.002., china shanghai institute of Immunology Shanghai Second Medical University Shanghai China shanghai institute of Biochemistry Chinese Academy of Sciences Shanghai China shanghai Ruijin Hospital Shanghai China

THE repertoire of T-cell antigen receptor(TcR)can be effectively analysed by an approachwith quantitative polymerase chain reaction(qPCR),which allows to characterize the ex-panding T-cell clones by the patterns of re... 详细信息

关键词： renal cell carcinoma tumor-infiltrating lymphocyte T-cell receptor Vβ gene quantitative polymerase chain reaction.

A maximum principle for optimal control problem of fully coupled forward-backward stochastic systems with partial information

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Science china Mathematics 2009年第7期52卷 1579-1588页

作者： MENG QingXin1,2.1 Department of Mathematical Sciences,Huzhou university,Zhejiang 313000,china 2.{2. of Mathematics,Fudan university,shanghai 2.0433,china 1. Department of Mathematical Sciences Huzhou University Zhejiang 313000 China 2. institute of Mathematics Fudan University Shanghai 200433 China

The paper is concerned with a stochastic optimal control problem in which the controlled system is described by a fully coupled nonlinear forward-backward stochastic differential equation driven by a Brownian *** is required that all admissible control processes are adapted to a given subfiltration of the filtration generated by the underlying Brownian *** this type of partial information control,one sufficient(a verification theorem) and one necessary conditions of optimality are *** control domain need to be convex and the forward diffusion coefficient of the system can contain the control variable.

关键词： maximum principle stochastic optimal control partial information 93E2. 60H10 60H30

Transformation law and trace formula on theta series under Siegel modular group

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Progress in Natural Science:Materials International 2005年第11期15卷 1050-1052页

作者： LU Hongwen and ZHOU Haigang (Department of Applied Mathematics, tongji university, shanghai 2.0092. china) Department of Applied Mathematics Tongji University Shanghai 200092 China

The purpose of this paper is to discuss symplectic transformation laws on theta series and give an explicit formula for trace of the symplectic operator

关键词： theta series symplectic transformation law trace formula.

Induced electromagnetic stirring behavior in a resistance spot weld nugget

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Science china(Technological Sciences) 2010年第5期53卷 1271-1277页

作者： LI YongBing1,LIN ZhongQin1,2.LAI XinMin1,2.CHEN GuanLong1,2.& ZHANG Ke3 1 shanghai Key Laboratory of Digital Autobody Engineering,shanghai Jiao Tong {2.,shanghai 2.02.0,china 2.State Key Laboratory of Mechanical System and Vibration,shanghai Jiao Tong {2.,shanghai 2.02.0,china 3 Welding Engineering institute,shanghai Jiao Tong {2.,shanghai 2.02.0,china 1. shanghai Key Laboratory of Digital Autobody Engineering Shanghai Jiao Tong University Shanghai 200240 China2. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai 200240 China3. Welding Engineering Institute Shanghai Jiao Tong University Shanghai 200240 China

A multi-physics hybrid numerical model,which couples electric,magnetic,thermal and flow fields,was used to investigate electromagnetic stirring behavior in a resistance spot weld *** differences of two kinds of different excitation inputs,i.e.,a sinusoidal current and its root-mean-square(RMS) value,were studied to examine if they could produce equivalent electromagnetic stirring effects in the weld *** showed that the two types of current inputs could produce almost identical fluid flow and heat transfer patterns and consistent evolution of flow and thermal fields in the *** the end of the welding cycles,the maximum flow velocity and temperature between the two inputs differed by 11.6% and 0.3%,***,the RMS current can be assumed to produce an approximately equivalent electromagnetic stirring effect with the sinusoidal current,and can be used in the future research to greatly improve the solution efficiency of the electromagnetic stirring behavior in the resistance spot weld nugget.

关键词： induced magnetic field electromagnetic stirring resistance spot welding fluid flow heat transfer

CLASSIFICATION OF AF-ALGEBRAS AND THEIR DIMENSION GROUPS

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Chinese Annals of Mathematics,Series B 1994年第2期15卷 181-192页

作者： HUANG ZHAOBO(institute of Mathematics, Fudan university, {2. 2.0433, {2., china) FUDAN UNIV INST MATHSHANGHAI 200433PEOPLES R CHINA

This paper gives the intrinsic character of the classification for AF-algebras defined by *** and G. K. Pedersen in terms of their dimension groups.

关键词： AF-algebra Demension group Classification.