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The lepton flavor violating signal of the extra gauge boson Z′in photon-photon collision at the ILC

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Science china(Physics,Mechanics & Astronomy) 2010年第11期53卷 1992-1997页

作者： LIU GuoLi 1,2 1 Physics Department,zhengzhou University,zhengzhou 450001,china 2 Kavli institute for Theoretical Physics china,Chinese Academy of Sciences,Beijing 100190,china Physics Department Zhengzhou University Zhengzhou China Kavli institute for Theoretical Physics china Chinese Academy of Sciences Beijing China

The hitherto unconstrained lepton flavor mixings,induced by the new gauge boson Z ,which are the prediction of many new physics models,such as topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models,may lead to the lepton flavor violating productions of τμˉ,τeˉ and μeˉ in photon-photon collision at the proposed International Linear Collider (ILC).Through a comparative analysis of these processes,we find that the better channel to probe the new physics models is the production of τμˉ or τeˉ which occurs at a much higher rate than μeˉ production due to the large mixing angle and the large flavor changing coupling,and may reach the detectable level of the ILC for a large part of the parameter *** the rates predicted by the Standard Model are far below the detectable level,these processes may serve as a sensitive probe for such new physics models.

关键词： new gauge boson Z lepton flavor violating processes photon-photon

A REMARK ON THE GLOBAL SMALL SOLUTION FOR GENERAL COUPLED MAXWELL-SCHR■DINGER EQUATIONS IN IR^3

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Systems Science and Mathematical Sciences 1999年第2期12卷 97-103页

作者： MIAO Changxing(institute of Applied Physics and Computational Mathematics, Beijing 100088, china)LI Zemin(Department of Mathematics, zhengzhou University, zhengzhou 450052, china)

This note is a continuation of earlier papers "The Cauchy Problem for General Coupled Maxwell-Schrodinger Equations (I) (II)". When the spatial dimensions are three ,we prove the existence of global small solution for... 详细信息

关键词： Coupled Maxwell-Schrodinger equations Cauchy problem quasi-energy method.

A single observer location method under the scatter signals position disturbance situation:the constraint total least square method

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Science china(Information Sciences) 2011年第1期54卷 146-152页

作者： YANG TianChi1,YU ChaoQun2,WANG TianPeng1 & JIN Liang1 1National Digital Switching System Engineering and Technological Research Center, zhengzhou 450002,china 2surveying and mapping College of Information Engineering University, zhengzhou 450002,china National Digital Switching System Engineering and Technological Research Center Zhengzhou China surveying and mapping College of Information Engineering University Zhengzhou China

A target position can be estimated using position information from scattered signals in the nonline-of-sight propagation environment in a single observer location *** is always an error in the final estimated result of the position obtained using scatter signals because measurement noise is *** reduce the total error of the system,we propose a method of converting the problem of optimizing location into a one of solving the extremes of the *** the problem of how to solve the extremes of the constraints is converted into an unconstrained problem by using the constrained total least squares(CTLS) ***,the Newton iteration method is used to obtain the optimized *** results also verify the capability of this method.

关键词： scatter position disturbing VOCTLS single observer location Newton iteration

Catalytic Hydrogenation of Diacetyl Monoxime to Tetramethylpyrazine with the Soluble Transition Metal Catalysts

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Chinese Chemical Letters 1999年第8期10卷 701-704页

作者： Xiang Yu WANG Xiao Ming ZHENG Zhao Yin HOU (institute of Catalysis, Zhejiang University (Xixi campus), Hangzhou 310028) (Department of Chemistry, zhengzhou University, zhengzhou 450052) institute of Catalysis Zhejiang University (Xixi Campus) Hangzhou 310028 China Department of Chemistry Zhengzhou University Zhengzhou 450052 China

Catalytic hydrogenation of diacetyl monoxime to tetramethylpyrazine, by the homogeneous catalysts generated in situ from some transition metal chlorides with triphenylphosphine in ethanol under H-2 pressure of 0.6 similar to 4.6 MPa at 100 similar to 150 degrees C, has been studied. The optimum H-2 partial pressure was observed at about 1.3 MPa. The maximum conversion of diacetyl monoxime and yield of tetramethylpyrazine were 97% and 90%, respectively.

关键词： diacetyl monoxime catalytic hydrogenation tetramethylpyrazine

INITIAL VALUE PROBLEM FOR A CLASS OF NONLINEAR PARABOLIC SYSTEM OF FOURTH-ORDER

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Acta Mathematica Scientia 1991年第4期11卷 393-400页

作者：陈国旺 institute of Mathematics Zhengzhou University Zhengzhou China

In this paper, the periodic boundary problem and the initial value problem for the nonlinear system of parabolic type u1=-A（x, t）ux4+B（x, t）ux2+（g（u））x2+（grad h（u））x+f（u）are studied, where u（x, t）=(u1（x, t）.…, uJ（x, t） is a J-dimensional unknown vector valued function, f（u） and g（u） are the J-dimensional vector valued function of u（x, t）, h（u） is a scalar function of u, A（x, t） and B（x, t） are J×J matrices of functions. The existent, uniqueness and regularities of the generalized global solution and classical global solution of the problems are proved. When J=1, h（u）=0, g（u）=au3, A=a1, B=a2, where a1, a2 a are constants, the system is a generalized diffusion model equation in population problem.

关键词： valued uniqueness parabolic scalar matrices constants CLASS formulas uniformly 八布

BIFURCATION RESULTS FOR A SEMILINEAR SCHRDINGER EQUATION WITH INDEFINITE LINEAR PART

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Acta Mathematica Scientia 2004年第3期24卷 493-498页

作者：张正杰卢伟明 Laboratory of Nonlinear Analysis Department of Mathematics Central China Normal University Wuhan 430079 China institute of Chemical Technology Zhengzhou Institute of Technology Zhengzhou 450052 Chinahis paper studies the following semilinear Schrodinger problem It is proven that there exists a bifurcation branch of solutions for the above problem when g(x) can possibly vanish except for a bounded domain ΩRN.

This paper studies the following semilinear Schrodinger problem It is proven that there exists a bifurcation branch of solutions for the above problem, when g(x) can possibly vanish except for a bounded domain Ω RN.

关键词： Schrodinger equation branch of solutions bifurcation

Transport Properties of LCMO Granular Films Deposited by the Pulsed Electron Deposition Technique

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Journal of Wuhan University of Technology(Materials Science) 2011年第6期26卷 1027-1031页

作者：陈雷明 zhengzhou institute of Aeronautical Industry Management

By finely controlling the deposition parameters in the pulsed electron deposition process, granular La 2/3 Ca 1/3 MnO 3 （LCMO） film was grown on silicon substrates. The substrate temperature, ambient pressure in the deposition chamber and acceleration potential for the electron beam were all found to affect the grain size of the film, resulting in different morphologies of the samples. Transport properties of the obtained granular films, especially the magnetoresistance （MR）, were studied. Prominent low-field MR was observed in all samples, indicating the forming of grain boundaries in the sample. The low-field MR show great sensitive to the morphology evolution, which reaches the highest value of about 40% for the sample with the grain size of about 250 nm. More interestingly, positive-MR （p-MR） was also detected above 300 K when low magnetic field applying, whereas it disappeared with higher magnetic field applied up to 1.5 and 2 Tesla. Instead of the spin- polarized tunneling process being commonly regarded as a responsible reason, lattice mismatch between LCMO film and silicon substrate appears to be the origin of the p-MR

关键词： colossal magnetoresistance granular film transport properties

A Novel Sesquiterpene Polyol Ester from Celastrus Angulatus and its Antitumor Activities

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Chinese Chemical Letters 1999年第6期10卷 487-490页

作者： Wei Ping YIN Tian Zeng ZHAO Ling Jie GAO Da Peng ZOU Jian Xun KANG(institute of Chemistry,Henan Academy of Sciences zhengzhou 450003 Centre of Instrumental Analysis. zhengzhou University. zhengzhou 450052) institute of Chemistry Henan Academy of Sciences Zhengzhou 450003 China Centre of Instrumental Analysis Zhengzhou University Zhengzhou 450052 China

A new sesquiterpene polyol ester was isolated from the leaves of Celastrus angulatus. Its structure was determined as 1 (beta), 2 (beta), 9 (a) -triacetoxy-8 (a) -((a) -hydroxyl-isobutyryloxy)-15-benzoyloxy-4 (a) -hydroxy-dihydroagarofuran by means of NMR, MS and IR spectral analysis. Preliminary biological study on antitumor activity revealed that this compound showed strong nonselective cytotoxicity against four of the NCI panel cell lines.

关键词： Celastrus angulatus sesquiterpene polyol ester NMR antitumor activities

Two-dimensional 4 × 4 optical switching element by using HOE and SLM

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Chinese Journal of Lasers 1994年第4期B3卷 351-353页

作者： LAI Songcan (Laser Laboratory, zhengzhou institute of Technology, Henan 450002, china) zhengzhou Inst of Technology Henan China

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Ｔｗｏ－ｄｉｍｅｎｓｉｏｎａｌ４×４ｏｐｔｉｃａｌｓｗｉｔｃｈｉｎｇｅｌｅｍｅｎｔｂｙｕｓｉｎｇＨＯＥａｎｄＳＬＭ￥ＬＡＩＳｏｎｇｃａｎ（ＬａｓｅｒＬａｂｏｒａｔｏｒｙ，ＺｈｅｎｇｚｈｏｕＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ，Ｈｅｎａｎ４５００...

关键词： photonic switching optical interconnection