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Higher order bulk characteristic parameters of asymmetric nuclear matter

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Science china(physics,Mechanics & Astronomy) 2011年第S1期54卷 124-129页

作者： chen liewen1,2.1department of physics, {2. jiao tong university, shanghai 2.02.0, china 2.enter of Theoretical Nuclear physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, china 1. department of physics Shanghai Jiao Tong University Shanghai 200240 China 2. Center of Theoretical Nuclear physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China

The bulk parameters characterizing the energy of symmetric nuclear matter and the symmetry energy defined at normal nuclear density ρ0 provide important information on the equation of state (EOS) of isospin asymmetric nuclear matter. While significant progress has been made in determining some lower order bulk characteristic parameters, such as the energy E0(ρ0) and incompress ibility K0 of symmetric nuclear matter as well as the symmetry energy Esym(ρ0) and its slope parameter L, yet the higher order bulk characteristic parameters are still poorly known. Here, we analyze the correlations between the lower and higher order bulk char acteristic parameters within the framework of Skyrme Hartree-Fock energy density functional and then estimate the values of some higher order bulk characteristic parameters. In particular, we obtain J0 = (-355±95) MeV and I0 = (1473±680) MeV for the third order and fourth-order derivative parameters of symmetric nuclear matter at ρ0 and Ksym = (-100 ± 165) MeV, Jsym = (2.4 ± 385) MeV, Isym = (-1309 ± 2.2.) MeV for the curvature parameter, third-order and fourth-order derivative parameters of the symmetry energy at ρ0, using the empirical constraints on E0(ρ0), K0, Esym(ρ0), L, and the isoscalar and isovector nucleon effective masses. Furthermore, our results indicate that the three parameters E0(ρ0), K0, and J0 can reasonably characterize the EOS of symmetric nuclear matter up to 2.0 while the symmetry energy up to 2.0 can be well described by Esym(ρ0), L, and Ksym.

关键词： equations of state of nuclear matter forces in hadronic systems and effective interactions symmetry energy nuclear density functional theory and extensions asymmetric matter neutron matter

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Traveling－Wave　Electrooptical　Modulator　on　Polymeric　Film　with　Reversal　Poling　Structure

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Chinese Journal of Lasers 1994年第1期B3卷 57-61页

作者： ZHOU Yi chen Yixin(department of Applied {2., shanghai jiao tong university, shanghai2.0030, china)SUN Shiping(department of Electronical Engineering ,shanghai jiao tong university , shanghai 2.0052. china) shanghai jiao{2. Univ Shanghai China

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关键词： reversal poling Electrooptical effect modulator

Characterization of Annealed, Proton Exchange Optical Waveguides in Y-cut MgO∶LiNbO3 Crystal

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Chinese Journal of Lasers 2000年第3期9卷 47-51页

作者： CAO Xia XIA Yuxing YANG Yi WANG Pinghe chen Xianfeng (department of Applied {2., shanghai jiao tong university, shanghai 2.0030, china) 上海交通大学上海

It is reported the results of a systematic study on planar w aveguides fabricated in Y-cut MgO∶LiNbO 3 crystal. The index profile of the as-exchanged waveguide can be modeled as a step-like one. It is deduced the diffusion coefficient and the activation energy for the proton exchange process. The surface index increases Δn e of around 0.12. after proton exchange can be reduced by post thermal annealing. The effects of the annealing on the index profile and guide depth were found not as fast as it does on a pure LiNbO 3 crystal.

关键词： proton exchange MgO∶LiNbO 3 crystal optical waveguides refractive index profile

Rational Form Solitary Wave Solutions and Doubly Periodic Wave Solutions to (1+1)-Dimensional Dispersive Long Wave Equation

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Communications in Theoretical physics 2005年第6期43卷 975-982页

作者： WANG Qi chen Yong ZHANG Hong-Qing department of Applied Mathematics, Dalian {2. of Technology, Dalian 11602.. china department of Mathematics, Ningbo {2., Ningbo 3152.1, china department of physics, shanghai jiao {12. {2., shanghai 2.0030, china department of Applied Mathematics Dalian University of Technology department of Mathematics Ningbo University department of physics Shanghai Jiao Tong University

In this work we devise an algebraic method to uniformly construct rational form solitary wave solutionsand Jacobi and Weierstrass doubly periodic wave solutions of physical interest for nonlinear evolution equations. Withthe aid of symbolic computation, we apply the proposed method to solving the (1+1)-dimensional dispersive long wavethe (1+1)-dmensional dispesive long wavedelliptic donbly periodc wave solutions as special cases.

关键词： elliptic equation rational expansion method rational form solitary wave solutions rational form Jacobi and Weierstrass doubly periodic wave solutions symbolic computation (1+1)-dimensional dispersive long wave equation

Induced electromagnetic stirring behavior in a resistance spot weld nugget

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Science china(Technological Sciences) 2010年第5期53卷 1271-1277页

作者： LI YongBing1,LIN ZhongQin1,2.LAI XinMin1,2.chen GuanLong1,2.& ZHANG Ke3 1 shanghai Key Laboratory of Digital Autobody Engineering,shanghai jiao tong university,shanghai 2.02.0,china 2.State Key Laboratory of Mechanical System and Vibration,shanghai jiao tong university,shanghai 2.02.0,china 3 Welding Engineering Institute,shanghai jiao tong university,shanghai 2.02.0,china 1. shanghai Key Laboratory of Digital Autobody Engineering Shanghai Jiao Tong University Shanghai 200240 China2. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai 200240 China3. Welding Engineering Institute Shanghai Jiao Tong University Shanghai 200240 China

A multi-physics hybrid numerical model,which couples electric,magnetic,thermal and flow fields,was used to investigate electromagnetic stirring behavior in a resistance spot weld *** differences of two kinds of different excitation inputs,i.e.,a sinusoidal current and its root-mean-square(RMS) value,were studied to examine if they could produce equivalent electromagnetic stirring effects in the weld *** showed that the two types of current inputs could produce almost identical fluid flow and heat transfer patterns and consistent evolution of flow and thermal fields in the *** the end of the welding cycles,the maximum flow velocity and temperature between the two inputs differed by 11.6% and 0.3%,***,the RMS current can be assumed to produce an approximately equivalent electromagnetic stirring effect with the sinusoidal current,and can be used in the future research to greatly improve the solution efficiency of the electromagnetic stirring behavior in the resistance spot weld nugget.

关键词： induced magnetic field electromagnetic stirring resistance spot welding fluid flow heat transfer

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Electric　Field　Analysis　of　Non－coplanar　Electrodes　in　Electrooptic　Modulator　with　a　Ridge　Waveguide　Structure

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Chinese Journal of Lasers 1996年第6期B5卷 551-555页

作者： ZHOU Yi YU Yang QIU Wei chen Yixin (Institute of Optics & Photonics department of Applied {2.,shanghai jiao tong university, shanghai 2.0030, china) shanghai jiao{2. Univ Shanghai China

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ＥｌｅｃｔｒｉｃＦｉｅｌｄＡｎａｌｙｓｉｓｏｆＮｏｎ－ｃｏｐｌａｎａｒＥｌｅｃｔｒｏｄｅｓｉｎＥｌｅｃｔｒｏｏｐｔｉｃＭｏｄｕｌａｔｏｒｗｉｔｈａＲｉｄｇｅＷａｖｅｇｕｉｄｅＳｔｒｕｃｔｕｒｅ￥ＺＨＯＵＹｉ；ＹＵＹａｎｇ；ＱＩＵＷｅｉ；ＣＨＥＮＹｉｘ...

关键词： ridge waveguide noncoplanat electrode electrooptic modulator

A Series of Soliton-like and Double-like Periodic Solutions of a (2.1)-Dimensional Asymmetric Nizhnik-Novikov-Vesselov Equation

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Communications in Theoretical physics 2004年第11期42卷 655-660页

作者： chen Yong,~(1,3,4, WANG Qi~(2.4) LI Biao~(2.4) ~1department of Mathematics,Ningbo {2.,Ningbo 3152.1,china ~2.1} of Applied Mathematics,Dalian {2. of Technology,Dalian 11602.,china ~3department of physics,shanghai jiao {12. {2.,shanghai 2.0030,china ~4Key Laboratory of Mathematics Mechanization~ the Chinese Academy of Sciences,Beijing 100080,china Key Laboratory of Mathematics Mechanization the Chinese Academy of Sciences Beijing 100080 China

We generalize the algebraic method presented by Fan [***.A:***.36 (2.03) 7009)] to uniformlyconstruct a series of soliton-like solutions and double-llke periodic solutions for nonlinear partial differential equations(NPDE),As an application of the method,we choose a (2.1)-dimensional asymmetric Nizhnik-Novikov-Vesselov equa-tion and successfully construct new and more general solutions including a series of nontraveling wave and coefficientfunctions’ soliton-like solutions,double-like periodic and trigonometric-like function solutions.

关键词： symbolic computation soliton-like solution Weierstrass and Jacobi elliptic functions periodic solution

A Generalized Algebraic Method for Constructing a Series of Explicit Exact Solutions of a(1+1)-Dimensional Dispersive Long Wave Equation

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Communications in Theoretical physics 2004年第9期 329-334页

作者： chen Yong~(1,2.3) WANG Qi~(2.3) LI Biao~(2.3)1 department of {2.,shanghai jiao tong university,shanghai 2.0030,china2.department of Applied Mathematics,Dalian university of Technology,Dalian 11602.,china3 Key Laboratory of Mathematics and Mechanization,the Chinese Academy of Sciences,Beijing 100080,china

Making use of a new and more general ansatz,we present the generalized algebraic method to uniformlyconstruct a series of new and general travelling wave solution for nonlinear partial differential *** an applicationof the method,we choose a(1+1)-dimensional dispersive long wave equation to illustrate the *** a result,wecan successfully obtain the solutions found by the method proposed by Fan [***,***.153(2.03)17]and find other new and more general solutions at the same time,which include polynomial solutions,exponentialsolutions,rational solutions,triangular periodic wave solutions,hyperbolic and soliton solutions,Jacobi and Weierstrassdoubly periodic wave solutions.

关键词： generalized algebraic method symbolic computation solitary wave solution Weierstrass and Jacobi elliptic functions periodic solution

Angular distribution of terahertz emission from laser interactions with solid targets

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Science china(Information Sciences) 2012年第1期55卷 43-48页

作者： DU Fei1,LI Chun1,ZHOU MuLin1,WANG WeiMin1,SU LuNing1,ZHENG Yi1,GE XuLei1,LI Yutong1,MA JingLong1,LIU XiaoLong1,ZHANG Lu1,SHENG ZhengMing1,2.chen LiMing1,LU Xin1,DONG QuanLi1,WANG ZhaoHua1,WEI ZhiYi1&ZHANG Jie1,2.Beijing National Laboratory of Condensed Matter {2.,Institute of {2.,Chinese Academy of Sciences,Beijing 100190,china 2.ey Laboratory for Laser Plasmas(Ministry of Education)and department of {2.,shanghai jiao tong university,shanghai {12.,china 1. Beijing National Laboratory of Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China2. Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics Shanghai Jiao Tong University Shanghai 200240 China

Intense femtosecond laser-plasma interactions can produce high power terahertz *** our experiment,the polished copper target was irradiated by a p-polarized laser with intensity of more than 1018 W/cm2.at an incident angle of 67.5 from the target *** THz energy from three dierent detection angles is *** maximum emission is found in the direction at an angle of 45 to the laser backward direction,which is more than one order of magnitude higher than in the other two directions.A simple theoretical model has been established to explain the measurements.

关键词： terahertz emission laser solid interactions angular distribution