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APPLICATION OF THE ANNEXATION PRINCIPLE TO THE STUDY OF THERMODYNAMIC PROPERTIES OF TERNARY METALLIC MELTS Cd-Pb-Sb

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Acta Metallurgica Sinica(English Letters) 2001年第5期14卷 368-374页

作者： J.Zhang Metallurgical Engineering school, university of Science and Technology beijing, beijing 100083. China Sch. of Metall. Eng. Univ. of Sci. and Technol. Beijing Beijing 100083 China

Based on the phase diagrams, measured activities and the annexation principle, the calculating models of mass action concentrations for Cd-Pb, Pb-Sb and Cd-Sb binary as well as Cd-Pb-Sb ternary metallic melts have been formulated. The results of calculation both agree with practice and obey the mass action law. This in turn testifies that the models formulated can reflect the structural reality of corresponding melts and the annexation principle is applicable to these melts.

关键词： Antimony alloys Cadmium alloys Lead alloys Phase diagrams Thermodynamic properties

DESIGN AND SYNTHESIS OF ANALOGS OF THE SCHISTOSOMA MANSONI P28 ANTIGENIC PEPTIDEP141

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Chinese Chemical Letters 1995年第6期6卷 465-466页

作者： Jia Xi XU Zhi Hui QIN Jun Y.ANG Meng Shen CAI(school of pharmaceutical Scienccs,beijing medical {3.,beijing 100083.(College of Chcmistry and Molecular Engineering.peking {3.. beijing 100871) beijing Med Univ Sch Pharmaceut Sci Beijing 100083 Peoples R China

Four analogs of the Schistosoma mansoni P28 antigenic peptide P141 were designed according to the similarity in the structure of the amino acid residues and Chou-Fasman's secondary structurally conformational parameters P alpha, P beta and Pt values, also according to the hydrophilicity of the amino acid residues. They were synthesized by using Merrifield solid phase peptide synthesis method. ELISA experiments showed their antigenicity.

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New templates of CNN for extracting corners of objects in gray-scale images

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Journal of university of Science and Technology beijing 2003年第3期10卷 73-75页

作者： Lequan Min, Ming Lei, and Xisong DongApplied Science school, university of Science and Technology beijing, beijing 100083. China Appl. Sci. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China

A new cellular neural network (CNN) with nonlinear templates is presented forextracting convex corners of objects in gray-scale images. Application examples showed that the newCNN can even detect convex corner charact... 详细信息

关键词： cellular neural network extract convex comers gray-scale images

ESKD-A New Structure of Expert System Based on Knowledge Discovery

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International Journal of Minerals,Metallurgy and Materials 2000年第1期14卷 63-71页

作者： Bingru Yang Fasheng liu Jiangtao Shen Information Engineering school, university of Science and Technology beijing, beijing, 100083. China Information Engineering school University of Science and Technology Beijing Beijing 100083 China

A new structure of ESKD (expert system based on knowledge discovery system KD (D&K)) is first presented on the basis of KD (D&K)-a synthesized knowledge discovery system based on double-base (database and knowledge base) cooperating mechanism. With all new features, ESKD may form a new research direction and provide a great probability for solving the wealth of knowledge in the knowledge base. The general structural frame of ESKD and some sub-systems among ESKD have been described, and the dynamic knowledge base based on double-base cooperating mechanism has been emphased on. According to the result of demonstrative experi- ment, the structure of ESKD is effective and feasible.

关键词： knowledge discovery expert system dynamic knowledge base, double-base cooperating mechanism

Acetazolamide inhibits aquaporin-1 protein expression and angiogenesis

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Acta Pharmacologica Sinica 2004年第6期25卷 110-114页

作者： Yang XIANG2, Bing MA, Tao LI, Jun-wei GAO, He-ming YU3. Xue-jun LI4 Departmentof Pharmacology, school of Basic medical Sciences, peking {3., beijing 100083.2Life Science Institute, Nanjing {3., Nanjing 210093.3.ational Research Institute for Family Planning, beijing 100081,China Department of Pharmacology School of Basic Medical Sciences Peking University Beijing 100083 China

AIM: To study effects of acetazolamide on aquaporin-1 (AQP1) protein expression and angiogenesis. METHODS: Establishing Lewis-lung-carcinoma model, the localization of AQP1 in tumor tissues was investigated by immuno- histochemical methods; The biological activity of acetazolamide was detected by endothelial cells proliferation test (MTT) assay and chorioallantoic membrane (CAM) vascular inhibition test. RESULTS: Immunohistochemical localization of AQP1in mice tumor was labeled in capillaries, post capillary venules endothelial cells. After being treated with acetazolamide, the number of capillaries and post capillary venules was significantly decreased in tumor tissue. Acetazolamide showed significant inhibitory effect on angiogenesis in CAMand endothelial cell proliferation. CONCLUSION: Acetazolamide might be identified and developed as one of potential lead compounds for a new therapeutic intervention in inhibiting cancer angiogenesis.

关键词： neoplasms acetazolamide angiogenesis inhibitors CHIP28

Complex conforming Delaunay triangulation

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Science China(Information Sciences) 2010年第6期53卷 1130-1140页

作者： MENG XianHai 1, LI JiGang 1, YANG Qin 1, CAI Qiang 2 & CHEN QiMing 3.1 NLSDE, school of Computer Science and Engineering, BeiHang university, beijing {3. China 2 school of Computer Sciences, beijing Technology and Business university, beijing 10003., China 3.school of Mechanical Engineering and Automation, BeiHang university, beijing {3. China 1. NLSDE School of Computer Science and Engineering BeiHang University Beijing 100083 China2. School of Computer Sciences Beijing Technology and Business University Beijing 100037 China3. School of Mechanical Engineering and Automation BeiHang University Beijing 100083 China

A novel algorithm of conforming Delaunay triangulation for curved geometry is presented in the paper.A progress has been made for the problem puzzled Delaunay refinement where curved constraints cannot be accepted as input *** algorithm is based on a new sufficient condition for the existence of constraints in *** requires computing only the intersection between constraints and Voronoi edges or faces instead of the circum-sphere of curved *** the termination of the algorithm when small input angles exist in constraints, a weighted method is applied to ensure that the algorithm can terminate under any *** two-dimensional and three-dimensional results are also *** is shown that the algorithm has the capability of dealing with both linear and nonlinear constraints in a consistent way, without the need of maintaining triangular meshes on face constraints.

关键词： mesh generation Delaunay triangulation conforming curved constraints tetrahedralization weight

A New Method for Fractal Dimension Determination by STM at Nanometer Scale

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International Journal of Minerals,Metallurgy and Materials 1999年第1期13卷 64-68页

作者： Qikai Li Yue Zhang Wuyang Chu Chen Wang Chunli Bai (Applied Science school. university of Science and Technology beijing, beijing 100083. China)(Chemical Institute, Chinese Academy of Science, beijing 100080. China) Applied Science school University of Science and Technology Beijing Beijing 100083 China Chemical Institute Chinese Academy of Science Beijing 100080 China

A new method for determining the fractal dimension by STM at nanomeler scale has been ***- Mandelbrot fractal curves were used to verify the accuracy and reliability. The Computer simulation showed that fractal dimen- sion obtained with this method generally outran the traditional yard method. The new method has been applied to the fractal dimension determination of the fractures of Ti3.l and Ti-24Al-11Nb alloys. The results show that the fractal dimension of Ti-24Al-11Nb alloy is higher than that of Ti3.l, and it varies with the crark extending orientation.

关键词： fractal dimension STM nanometer scale Ti-Al alloy

Mass transfer coefficients in metallurgical reactors

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Journal of university of Science and Technology beijing 2003年第2期10卷 1-9页

作者： Ying QuMetallurgical Engineering school, university of Science and Technology beijing, beijing 100083. China Univ Sci & Technol beijing Met Engn Sch Beijing 100083 Peoples R China

An overview on the application and achievements of physico-mathematicalmodeling of metallurgical processes in China is briefly declared. The important role of coefficientsin model formulation is shown from our experience. The mass transfer coefficients of the slag-metalreactions and the gas-metal reactions are discussed referring to the flow conditions near theinterface. The influence of the surface-active species on the mass transfer and the interfacialreaction is also discussed briefly.

关键词： mass transfer modeling pyrometallurgy reaction engineering interfacial flow stirring power

Hausdorff dimension of Julia set of a polynomial with a Siegel disk

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Science China Mathematics 2006年第9期49卷 1284-1296页

作者： SHEN Liang LMAM, school of Mathematical Sciences, peking university, {3. 100871, China LMAM School of Mathematical Sciences Peking University Beijing 100871 China

Let f(z) = e2πiθz(1+z/d)d,θ∈R\Q be a polynomial. Ifθis an irrational number of bounded type, it is easy to see that f(z) has a Siegel disk centered at 0. In this paper, we will show that the Hausdorff dimension o... 详细信息

关键词： Hausdorff dimension Siegel disk porous set