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Compactness in fuzzy logic

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Chinese science Bulletin 1998年第14期43卷 1166-1171页

作者： YING Mingsheng department of Computer science and Technology, Tsinghua university, beijing 100084, china department of Computer science and Technology Tsinghua University Beijing China

Compactness in Pavelka’s fuzzy logic for some compact lattices of truth values is shown, and the concept of gradual compactness is introduced to establish some corresponding results in a more general setting.

关键词： fuzzy logic compactness gradual compactness.

Algorithm for Computation of Unstructured Real Stability Radius and Its Applications

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International Journal of Minerals,Metallurgy and Materials 1998年第4期12卷 245-250页

作者： Xiaodan Zhang Lequan Min(Applied science School, university of science and Technology beijing, beijing 100083, china) Applied science School University of Science and Technology Beijing Beijing 100083 China

An algorithm for the computation of the unstructured real stability radius of high dimensional linearsystem is presented. Using the accurate formula of the real stability radius of 2-dimensional system linear systemchecks the algorithm. The result shows that the algorithm is reliable and efficient. As applications, the unstructuredreal stability radii of 2-dimensional Chua's circuit and 3-dimensional piecewise-linear system are calculated, thedynamical orbits of the corresponding perturbed systems are simulated.

关键词： lincar systems stability robustness parameter perturbation computational methods

Temperature distribution in the tool-chip-workpiece system during the orthogonal cutting process

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International Journal of Minerals,Metallurgy and Materials 1997年第3期11卷 30-34页

作者： ZHENG Chun GU Tong (department of Mechanical Engineering, McMaster university, Canada) (Applied science School, university of science and Technology beijing, beijing 100083, china) McMaster Univ Canada

The temperature distribution in the tool, chip and workpiece was studied during the orthogonal cuttingprocess Under several different cutting conditions. The temperature distribution is calculated by the finite differencemethod. and the variation of the material properties with temperature was taken was taken into account The results obtained arecoincident with both previous published results and experimental measurements.

关键词： temperature distribution orthogonal cutting FDM tool-chip-workpiece system

Nucleation of Cold Rolled FeCo Alloy during Annealing and Its Influence on the Formation of Recrystallization Texture

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Journal of Materials science & Technology 2000年第5期16卷 543-545页

作者： Guohui ZHU, Weimin MAO+ and Yongning YU (department of Metal Materials, university of science and Technology beijing, beijing 100083, china) department of Metal Materials University of Science and Technology Beijing Beijing 100083 China

The orientation distribution of recrystallization grains formed during annealing, as well as their misorientation relationship to the deformation matrix in cold rolled FeCo alloy have been investigated. It was found that most of the recrystallization nuclei were located near the boundary area with rather random orientations, and their misorientation angles to the deformation matrix were generally very high. However a few nuclei were also observed inside the deformation grains, to which they had very similar orientations. Therefore the misorientation angles between the nuclei and the deformation matrix were generally very low. The orientation and the misorientation distributions of the nuclei have very strong influence on the recrystallization process which could result in a very weak recrystallization texture. The corresponding mechanism is discussed.

关键词： In Nucleation of Cold Rolled FeCo Alloy during Annealing and Its Influence on the Formation of Recrystallization Texture

Calculating model of mass action concentrations for Ag-Au-Cu melts

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Rare Metals 2002年第1期21卷 43-47页

作者： ZHANG Jian Metallurgy School, university of science and Technology beijing, beijing 100083, china Metallurgy School University of Science and Technology Beijing 北京 100083

Based on phase diagrams and measured activities, the calculatingmodel of mass action concentrations for het- erogeneous meltsAg-Au-Cu was formulated. Calculated results agree with the improvedresults of recent research work, Showing that the model formulatedcan reflect the structural characteristics of these melts. In thismodel, without the help Of any empirical parameters, only threeequilibrium constants are used, hence it is simple, lear, andfavorable to the sim- Plification of calculation.

关键词： activity mass action concentration eutectic Solid solution

SUPERSATURATED DESIGN WITH MORE THAN TWO LEVELS

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Chinese Annals of Mathematics,Series B 2001年第2期22卷 183-194页

作者： LU XUAN SUN YIZHOU department of Mathematical science, Tsinghua university, beijing 100084, china. department of Mathematical science Tsinghua Univeristy Beijing 100084 China

Supersaturated designs are useful in screening experiments. This paper discusses the topic of multi-level supersaturated design. Two quantities, E(d2) and Df, are proposed to evaluate the optimality of supersaturated designs. A lower bound of E(d2) is obtained with a necessary condition for achieving it. Some E(d2)-optimal supersaturated designs of 3, 4, and 5 levels are given.

关键词： D-efficiency Screening experiment Fractional factorial design Orthogonality

A Discussion on Evolution of Microstructures and Influence Factors during Continuous Rolling of Compact Strip Production

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Journal of Materials science & Technology 2004年第3期20卷 274-278页

作者： Hongbo DONG Yonglin KANG Hao YU department of Materials Processing and Controlling, university of science and Technology beijing, beijing 100083, china Dept. of Mat. Proc. and Control Univ. of Sci. and Technol. Beijing Beijing 100083 China

The evolution of microstructures and influence factors of ultrathin hot strips of low carbon steel produced by compactstrip production (CSP) techniques were investigated. The steel blocking samples of CSP six-passes were obtained,and microstructures at the different positions of workpiece for each pass were studied. At the same time, anexplicit finite element technique was used to reveal the continuous rolling process. By combining experiment resultswith simulation analysis, the effects of plastic strain, temperature, precipitation and interval time on evolution andrefinement of crystal grains have been investigated. The results are useful for the development of high strength hotstrips.

关键词： CSP Microstructure Strain Temperature Precipitation

A Besov Estimate for Multilinear Singular Integrals

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Acta Mathematica Sinica,English Series 2000年第4期16卷 613-626页

作者： Wengu Chen department of Mathematics, capital Normal university. beijing 100037. P. R. china department of Mathematics Capital Normal University Beijing 100037 P. R. China

The main pnrpose of this paper is to prove a good λ inequality for a multilinear singular integral in R^n.

关键词： Multilinear operator Besov space Good λ inequality

Progress in studies on the characteristics of human amnion mesenchymal cells

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Progress in Natural science:Materials International 2009年第9期19卷 1047-1052页

作者： Jingwei Hu a,b,c, Zhe Cai c,*, Zhongshu Zhoub,* a Graduate School of beijing Union medical College, beijing 100730, china b Pediatrics department of china–Japan Friendship hospital, beijing 100029, china c Institute of Clinical medical science, china–Japan Friendship hospital, beijing 100029, china Graduate School of beijing Union medical College Beijing 100730 China Pediatrics department of china–Japan Friendship hospital Beijing 100029 China Institute of Clinical medical science China–Japan Friendship Hospital Beijing 100029 China

The amniotic membrane (AM) in humans is the innermost fetal membrane and is composed of amnion mesenchymal cells (hAMCs) and amnion epithelial cells (hAECs). The former are derived from the extra-embryonic mesoderm of the primitive streak, and the latter from the fetal ectoderm. Numerous studies have shown that both hAMCs and hAECs display stem cell characteristics. In this review, we examine the progress made in understanding the characteristics of hAMCs, including information on the structure and function of AM and hAMCs, their immunological features, and the pluripotency of hAMCs.

关键词： Human amnion mesenchymal cells Hypo-immunogenicity Immunosuppression Differentiation