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Science China Chemistry 2010年第1期53卷 36-44页

作者： QIN GuoTing & CAI ChengZhi Department of Chemistry,university of Houston,Houston,Texas 77204,usa 1. Department of Chemistry University of Houston Houston Texas 77204 USA

Functionalization of silicon substrate surfaces with a stable monolayer for resisting non-specific adsorption of proteins has attracted great interest,since it is directly relevant to the development of miniature,silicon-based biosensors and implantable microdevices,such as silicon-neuron *** brief review summarizes our contribution to the development of robust monolayers grown by surface hydrosilylation on atomically flat,hydrogen-terminated silicon *** review also outlines our strategy and progress on the fabrication of single molecule patterns on such monolayer platforms.

关键词： protein-resistant monolayers surface hydrosilylation conductive atomic force microscope nanopatterning

Irregular-Mode Cracking in Fe-3 wt pct Si Alloy

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Journal of Materials Science & Technology 2005年第3期21卷 338-342页

作者： Y.Qiao Department of Civil Engineering, university of Akron, Akron, OH 44325-3905, usa Department of Civil Engineering University of Akron Akron OH 44325-3905 United States

Due to the non-uniform nature of crack advance, when a cleavage front encounters a high-angle grain boundary, instead of simultaneous break-through along the whole boundary, the front transmission mode can be irregular, which results in a higher fracture resistance and a tortuous percolation behavior. In this paper, this phenomenon is studied quantitatively through the analysis on the work of separation and the change in strain energy for an Fe-3 wt pct Si alloy. The influences of the crystallographic misorientations, the break-through mode, the cleavage front profile, and the grain boundary properties are discussed in detail.

关键词： Fracture toughness Transgranular Iron-silicon alloy Irregular mode

Mapping Problems,Fundamental Groups and Defect Measures

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Acta Mathematica Sinica,English Series 1999年第1期15卷 25-52页

作者： Fanghua LinCourant Institute of Mathematics,New York university,New York,NY 10012,usa Courant Institute of Mathematics New York University New York USA

We study all the possible weak limits of a minimizing sequence,for p-energy functionals, consisting of continuous maps between Riemannian manifolds subject to a Dirichlet boundary condition or a homotopy *** show that if p is not an integer,then any such weak limit is a strong limit and,in particular,a stationary p-harmonic map which is C1,α continuous away from a closed subset of the Hausdorff dimension ≤n-[p]-*** p is an integer,then any such weak limit is a weakly p-harmonic map along with a（n-p）-rectifiable Radon measure μ.Moreover,the limiting map is C1,α continuous away from a closed subset ∑=spt μ∪S with Hn-p（S）=***,we discuss the possible varifolds type theory for Sobolev mappings.

关键词： Defect measure Harmonic mapping Generalized varifold Rectifiability

Effects of radix astragali,scutellaria baicalensis georgi and notifying qi and cleaning re prescription on the balance between apoptosis and proliferation of the helicobacter pylori-infected ges-1 cells

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Effects of radix astragali,scutellaria baicalensis georgi an...

Representations of Knot Groups and Twisted Alexander Polynomials

中国药学会应用药理专业委员会第三届学术会议、中国药理学会制药工业专业委员会第十三届学术会议暨2008生物医药学术论坛

作者： ShiHai Yan Xuanxuan Zhu Pharmacology Departmant,Provincial Hospital of Traditional Chinese Medicine Jiangsu,Nanjing Weimin Lu Xuewen Yang Changle Zhu Jieping Miao Department of Gastroenterology,Provincial Hospital of Traditional Chinese Medicine Jiangsu,Nanjin Fang Zhou Haiping Hao Key Lab of Drug Metabolism & Pharmacokinetics,China Pharmaceutical university,Nanjing Weillang Xie Molecular and Cellular Biology Program,the university of iowa,iowa city,ia,usa,522.2

Helicobacter pylori(***)-infected patients have a significantly higher risk of developing peptic ulcer or gastric *** produce cytotoxic products(CagA and VacA)that can interfere in the balance between apoptosis and proliferation of the gastric epithelial cells in the early *** infection-induced alteration of the balance contributes to the gastric mucosal damage and favors the carcinogenetic *** herbal remedies have been used to treat gastric *** the present study,the medicated serum *** Qi and Cleaning Re(NQCR)Prescription and its main components Radix Astragali(RA)and Scutellaria Baicalensis Georgi(SBG)significantly prevented the H. pylori-induced imbalance between the apoptosis and the proliferation in human gastric epithelial cell line GES-1 *** medicated serum inhibited the increased levels of two cellular proteins,COX-2 and ki67, that are closely related to the status of apoptosis and *** implies that the alteration of COX-2 and ki67 may contribute to the protective effects of RA,SBG and NQCR *** on the above findings,we infer that RA,SBG and NQCR Prescription balance the homeostasis between apoptosis and proliferation of the gastric epithelial cells,thereby preventing or delaying the pathological process of gastric diseases such as chronic gastritis and gastric cancer.

关键词： H.pylori Notifying Qi and Cleaning Re Prescription apoptosis proliferation ki67 COX-2

来源： cnki会议评论

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Acta Mathematica Sinica,English Series 2001年第3期17卷 5+362-380页

作者： Xiao Song LIN Department of Mathematics,university of California,Riversides,CA 92.2..usa Department of Mathematics University of California Riverside USA

We present a twisted version of the Alexander polynomial associated with a matrix rep- resentation of the knot *** of two knots with the same Alexander module but different twisted Alexander polynomials are given.

关键词： Twisted Alexander polynomial Representation space Knot group

STUDY ON RESTRAINING THE RESIDUAL VIBRATION OF FLEXIBLE ARM BY PLANNING ACCELERATION

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Chinese Journal of Mechanical Engineering 2000年第4期13卷 245-250页

作者： Zhu Jian (Centre for Intelligent Design ,Automation and Manufacturing， city university of Hong Kong, Hong Kong) Shao Hao Wang Xingsong (Harbin Institute of Technology Southeast university) 香港城市大学香港哈尔滨工业大学黑龙江哈尔滨东南大学江苏南京

The method of planning acceleration is discussed to restrain the residual vibration of flexible arm. Based on the built mathematical model of the flexible arm, the equations of vibration with acceleration,vibration frequency,damping and time are obtained *** to the vibration frequency and damping, the suitable acceleration is executed experimentally to the flexible arm at the corresponding time. The result shows that this way can give rise to good effect to restrain the residual vibration.

关键词： Flexible arm Restraining vibration control Acceleration

WHAT DOES CHAOS HAVE TO DO WITH SYSTEMS AND CONTROL ENGINEERING?

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Journal of Systems Science & Complexity 2001年第1期14卷 31-39页

作者： CHEN Guanrong (Department of Electrical and Computer Engineering, university of Houston, Houston, Texas 77204, usa Department of Electronic Engineering, city university of Hong Kong, Kowloon, Hong Kong SAR, China) university of Houston 美国 77204

Chaos as a very special type of complex dynamical behaviors has been studied for about four decades. Yet the traditional trend of analyzing and understanding chaos has evolved to controlling and utilizing chaos today. Research in the field of chaos modeling, control, and synchronization includes not only ordering chaos, which means to weaken or completely suppress chaos when it is harmful, but also chaotification, which refers to enhancing existing Chaos or creating chaos purposely when it is useful, by any means of control technology. This article offers a brief overview about the potential impact of controlled chaos on beneficial applications in science and engineering, and introduces some recent progress in chaotification via feedback control methods.

关键词： Chaos chaos control chaotification complexity feedback.

T1 theorem for Besov and Triebel-Lizorkin spaces

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Science China Mathematics 2005年第5期48卷 657-665页

作者： DENG Donggao & HAN Yongsheng Department of Mathematics, Zhongshan university, Guangzhou 510275, China Department of Mathematics, Auburn university, Alabama, 36849, usa Dept. of Math. Zhongshan Univ. Guangzhou 510275 China Dept. of Math. Auburn Univ. Alabama 36849 United States

Using the discrete Calderon type reproducing formula and the PlancherelPolya characterization for the Besov and Triebel-Lizorkin spaces, the T1 theorem for the Besov and Triebel-Lizorkin spaces was proved.

关键词： T1 theorem Besov and Triebel-Lizorkin spaces Calderon reproducing formula Plancherel-Polya inequalities.

A UNIFIED TIME-MARCHING PROCEDURE FOR COMPRESSIBLE INCOMPRESSIBLE FLOWS

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Journal of Hydrodynamics 1995年第4期7卷 13-21页

作者： Charles L. Merkle Feng Jin-zhang(Propulsion Engineering Research, The Pennsylvania State university, university Park, PA 16802, usa) The Pennsylvania State Univ United States

A time derivative preconditioning is introduced that allows a unified treatment of timemarching methods for both compressible and incompressible flows from inviscid to creeping flow. Results show that convergence rates are independent of Reynolds numbers and Mach numbers throughout this regime. A Complete formulation'based on an arbitrary equation of state facilitates the changes from one type of fluid to another and, in particular, the extension to incompressible flows. The resulting time-marching algorithm is shown in the incompressible limit to be identical to iterative methods based on pressure-Poisson methods, and it is demonstrated that both method are hyperbolic.

关键词： computational fluid dynamics time-marching procedure flow

Observations of the first light and the epoch of reionization

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Research in Astronomy and Astrophysics 2012年第8期12卷 865-890页

作者： Xiaohui Fan Kavli Institute for Astronomy and Astrophysics, Peking university, Beijing 100871, China Steward Observatory, The university of Arizona, Tucson, 85721, usa Kavli Institute for Astronomy and Astrophysics Peking University Beijing 100871 China Steward Observatory The University of Arizona Tucson 85721 USA

Studying the first generation of stars, galaxies and supermassive black holes as well as the epoch of reionization is one of the fundamental questions of modern as- trophysics. The last few years have witnessed the first confirmation of the discoveries of galaxies, quasars and Gamma-Ray Bursts at z 〉 7, with possible detections at z - 10. There is also mounting evidence that cosmic reionization is a prolonged pro- cess that peaks around z - 10 and ends at z- 6 - 7. Observations of the highest redshift intergalactic medium and the most metal-poor stars in the Galaxy begin to constrain the earliest chemical enrichment processes in the Universe. These observa- tions provide a glimpse of cosmic history over the first billion years after the Big Bang. In this review, we will present recent results on the observations of the high-redshift Universe over the past decade, highlight key challenges and uncertainties in these observations, and preview what is possible with the next generation facilities in studying the first light and mapping the history of reionization.

关键词： galaxies: evolution -- galaxies: formation -- galaxies: high-redshift-- intergalactic medium -- quasars: general -- cosmology: large-scale structure ofuniverse