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Nano-Structure Observed in Highly Doped Silicon Crystalline

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Journal of Materials Science & Technology 1993年第3期9卷 232-234页

作者： Zhiheng LU department of physics,{2. normal University,{2.,100875,chinaDachan WANG Yan LUO Institute of Low Energy Nuclear physics,{2. normal University,{2.,100875,china

It was reported that due to the non-linear electrical phenomena,the super-saturated arsenic in silicon single crystalline precipitates during post processing at low temperatures to form different *** structure with sp... 详细信息

关键词： nano-structure silicon semiconductor materials

Weighted estimates for the multilinear singular integral operators with non-smooth kernels

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Science china Mathematics 2011年第3期54卷 587-602页

作者： HU GuoEn1 & LU ShanZhen2.1department of Applied Mathematics, Zhengzhou Information Science and Technology Institute, Zhengzhou 450002. china 2.0} of Mathematics, beijing normal University, beijing 100875, china 1. department of Applied Mathematics Zhengzhou Information Science and Technology Institute Zhengzhou 450002 China2. Department of Mathematics Beijing Normal University Beijing 100875 China

In this paper, by sharp function estimates and certain weak type endpoint estimates, the authors establish some weighted norm inequalities with Ap weights for the multilinear singular integral operators with non-smoot... 详细信息

关键词： approximation to the identity weighted norm inequality singular integral operator non-smooth kernel Calderón-Zygmund decomposition

A Probabilistic Approach to the First Dirichlet Eigenvalue on Non-compact Riemannian Manifold

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Acta Mathematica Sinica,English Series 1997年第1期13卷 116-126页

作者： Wang Fengyu (department of Mathematics,beijing {2. University,beijing 100875,china) department of Mathematics Beijing Normal University 100875 Beijing China

By using diffusion process with absorbing boundary,some lower bounds are obtained for the first Dirichlet eigenvalue of operator Δ+▽h on a non-compact complete Riemannian manifold. The resulting estimates contain McKean’s estimate for ▽h=***,the first Dirichlet eigen- value for elliptic operators on R^d and the first mixed eigenvalue are also *** examples show that our estimates can be sharp even for ▽h≠0.

关键词： Dirichlet eigenvalue Diffusion process Mixed eigenvalue

Representation type of 0-Hecke algebras

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Science china Mathematics 2011年第3期54卷 411-420页

作者： DENG BangMing1 & YANG GuiYu2.1department of Mathematics, beijing {2. University, beijing 100875, china 2.chool of Science, Shangdong University of Technology, Zibo 2.5049, china 1. department of Mathematics Beijing Normal University Beijing 100875 China2. School of Science Shangdong University of Technology Zibo 255049 China

In the present paper we determine the representation type of the 0-Hecke algebra of a finite Coxeter group.

关键词： Coxeter group 0-Hecke algebra representation type

Recent progress on the structure of Ser/Thr protein phosphatases

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Science china(Life Sciences) 2008年第6期51卷 487-494页

作者： WANG BaiJing1,2. ZHANG Peng1 & WEI Qun1 1 department of Biochemistry and Molecular Biology, beijing {2. University, beijing Key Laboratory, beijing 100875, china 2.School of Life Science, Changchun {2. University, Changchun 130032. china 1. department of Biochemistry and Molecular Biology Beijing Normal University Beijing Key Laboratory Beijing 100875 China 2. School of Life Science Changchun Normal University Changchun 130032 China

PP1, PP2. and PP2., belonging to the PPP family of Ser/Thr protein phosphatases, participate in regulating many important physiological processes, such as cell cycle control, regulation of cell growth and division regulation, etc. The sequence homology between them is relatively high, and ter- tiary structure is conserved. Because of the complexity of the structure of PP2. and the diversity of its regulatory subunits, its structure is less well known than those of PP1 and PP2.. The PP2. holoen- zyme consists of a heterodimeric core enzyme, comprising a scaffolding subunit and a catalytic sub- unit, as well as a variable regulatory subunit. In this study, the subunit compositions, similarities and differences between the Ser/Thr protein phsphatases structures are summarized.

关键词： Ser/Thr phosphatases subunit composition similarities and differences crystal structure

Weighted weak type estimates for commutators of the Marcinkiewicz integrals

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Science china Mathematics 2004年第1期47卷 83-95页

作者： DING Yong, LU Shanzhen & ZHANG Pudepartment of Mathematics, beijing {2. University, beijing 100875, china department of Information and Computing Science, Zhejiang Institute of Science and Technology, Hangzhou 310033, china 1. department of Mathematics Beijing Normal University 100875 Beijing China 2. department of Information and Computing Science Zhejiang Institute of Science and Technology 310033 Hangzhou China

In this paper the authors give the weighted weak LlogL type estimates for a class of the higher order commutator generated by the Marcinkiewicz integral and a BMO function. In addition, the weak type norm inequalities... 详细信息

关键词： Marcinkiewicz integral, commutator, Ap weight, weak type estimate.

Vaught's Conjecture on Unitary Relations

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Acta Mathematica Sinica,English Series 1998年第2期14卷 277-284页

作者： Luo Libo (department of Mathematics,beijing {2. University,beijing 100875,china) department of Mathematics Beijing Normal University 100875 Beijing China

We confirm the Vaught’s conjecture and obtain a complete classification for the theories of unitary relations.

关键词： Vaught’s conjecture Unitary relation

Characterization for commutators of n-dimensional fractional Hardy operators

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Science china Mathematics 2007年第10期50卷 1418-1426页

作者： Zun-wei FU~(1,2. Zong-guang LIU~3 Shan-zhen LU~(1+) Hong-bin WANG~3 ~1 School of Mathematical Sciences,beijing normal University,beijing 100875,china ~2.department of Mathematics,Linyi normal University,Linyi 2.6005,china ~3 department of Mathematics,china University of Mining and Technology (beijing),beijing 100083,china 1. School of Mathematical Sciences Beijing Normal University Beijing 100875 China 2. department of Mathematics Linyi Normal University Linyi 276005 China 3. department of Mathematics China University of Mining and Technology (Beijing) Beijing 100083 China

In this paper,it was proved that the commutator H_(β,b)generated by an n-dimensional fractional Hardy operator and a locally integrable function b is bounded from L^(p1)(R^n)to L^(p2.(R^n)if and only if b is a CMO(R^... 详细信息

关键词： n-dimensional fractional Hardy operator, commutator, C(M)O function, homogeneous Herz space

Theoretical Study on the Pyrolysis Mechanism and Kinetics of 3-Hydroxy-3-Methyl-2.Butanone

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Chinese Chemical Letters 1998年第11期9卷 0-0页

作者： Wen Lin FENG Jie Hao CHEN Yan WANG (department of chemistry, beijing {2. University, beijing 100875) beijing normal Univ Dept Chem Beijing 100875 Peoples R China

The mechanism and kinetics for the decomposition of 3-hydroxy-3-methyl-2.butanone have been studied by using the ab initio RHF/3-2.G method. The calculated activation barrier of the reaction is 2.9.6kJ/mol which is in reasonable agreement with the experimental data (2.2.2.3kJ/mol). The calculated results show that the decomposition is a concerted process with hydrogen transferring and bond breaking via a five-membered cyclic transition state. The thermal rate constants of the decomposition are obtained by calculating microcanonical probability fluxes through transition state1.

关键词： Kinetics mechanism theoretical study rate constants