检索结果-南通市图书馆

维普期刊数据库

Higher order bulk characteristic parameters of asymmetric nuclear matter

在线全文

学校读者我要写书评

暂无评论

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

作者： chen liewen1,2 1department of physics, shanghai jiao tong university, shanghai 200240, china 2Center of Theoretical Nuclear physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, china shanghai jiao tong university Department of Physics Shanghai China (GRID:grid.16821.3c) (ISNI:***) National Laboratory of Heavy Ion Accelerator Center of Theoretical Nuclear Physics Lanzhou China (GRID:grid.450259.f) (ISNI:0000 0004 1804 2516)

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 = (224 ± 385) MeV, Isym = (-1309 ± 2025) 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 2ρ0 while the symmetry energy up to 2ρ0 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

维普期刊数据库

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

在线全文

学校读者我要写书评

暂无评论

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

作者： ZHOU Yi chen Yixin(department of Applied physics, shanghai jiao tong university, shanghai200030, china)SUN Shiping(department of Electronical Engineering ,shanghai jiao tong university , shanghai 200052, china) shanghai jiaotong Univ Shanghai China

Ｔｒａｖｅｌｉｎｇ－ＷａｖｅＥｌｅｃｔｒｏｏｐｔｉｃａｌＭｏｄｕｌａｔｏｒｏｎＰｏｌｙｍｅｒｉｃＦｉｌｍｗｉｔｈＲｅｖｅｒｓａｌＰｏｌｉｎｇＳｔｒｕｃｔｕｒｅ￥ＺＨＯＵＹｉ；ＣＨＥＮＹｉｘｉｎ（Ｄｅｐａｒｔｍｅｎｔｏ... 详细信息

Ｔｒａｖｅｌｉｎｇ－ＷａｖｅＥｌｅｃｔｒｏｏｐｔｉｃａｌＭｏｄｕｌａｔｏｒｏｎＰｏｌｙｍｅｒｉｃＦｉｌｍｗｉｔｈＲｅｖｅｒｓａｌＰｏｌｉｎｇＳｔｒｕｃｔｕｒｅ￥ＺＨＯＵＹｉ；ＣＨＥＮＹｉｘｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，Ｓ...

关键词： reversal poling Electrooptical effect modulator

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 physics, shanghai jiao tong university, shanghai 200030, 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 0.127 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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 university of Technology, Dalian 116024. china department of Mathematics, Ningbo university, Ningbo 315211, china department of physics, shanghai jiao tong university, shanghai 200030, china department of Applied Mathematics Dalian University of Technology Dalian 116024 China department of Mathematics Ningbo University Ningbo 315211 China department of physics Shanghai Jiao Tong University Shanghai 200030 China

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

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 physics,shanghai jiao tong university, shanghai 200030, china) shanghai jiaotong Univ Shanghai China

ＥｌｅｃｔｒｉｃＦｉｅｌｄＡｎａｌｙｓｉｓｏｆＮｏｎ－ｃｏｐｌａｎａｒＥｌｅｃｔｒｏｄｅｓｉｎＥｌｅｃｔｒｏｏｐｔｉｃＭｏｄｕｌａｔｏｒｗｉｔｈａＲｉｄｇｅＷａｖｅｇｕｉｄｅＳｔｒｕｃｔｕｒｅ￥ＺＨＯＵＹｉ；ＹＵＹａ... 详细信息

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

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 university,Ningbo 315211,china ~2department of Applied Mathematics,Dalian university of Technology,Dalian 116024,china ~3department of physics,shanghai jiao tong university,shanghai 200030,china ~4Key Laboratory of Mathematics Mechanization~ the Chinese Academy of Sciences,Beijing 100080,china department of Mathematics Ningbo University department of Applied Mathematics Dalian University of Technology department of physics Shanghai Jiao Tong University Key Laboratory of Mathematics Mechanization the Chinese Academy of Sciences

We generalize the algebraic method presented by Fan [***.A:***.36 (2003) 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

Angular distribution of terahertz emission from laser interactions with solid targets

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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 Jie1,21Beijing National Laboratory of Condensed Matter physics,Institute of physics,Chinese Academy of Sciences,Beijing 100190,china 2Key Laboratory for Laser Plasmas(Ministry of Education)and department of physics,shanghai jiao tong university,shanghai 200240,china Beijing National Laboratory of Condensed Matter physics Institute of Physics Chinese Academy of Sciences

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

The nuclear symmetry energy and neutron skin thickness of finite nuclei

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The nuclear symmetry energy and neutron skin thickness of fi...

Higher-order symmetry energy of asymmetric nuclear matter

第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Lie-Wen chen~(1 1)) 1(department of physics,shanghai jiao tong university,shanghai 200240,china)

Heavy-ion reactions induced by neutron-rich nuclei and the neutron skin thickness of heavy nuclei provide a unique means to investigate the equation of state of isospin asymmetric nuclear matter,especially the density dependence of the nuclear symmetry *** review the recent progress on the determination of the density dependence of symmetry energy from both heavy ion reactions and nuclear *** particular,using a novel correlation analysis,which allows us to explore transparently the correlation between observables of finite nuclei and nuclear matter properties within the Skyrme-Hartree-Fock approach, we find that the existing neutron skin data of Sn isotopes can give important constraints on the value E（ρ） and its density slope L of the nuclear symmetry energy at saturation densityρ.Combining these constraints from nuclear structure with those from recent analyses of isospin diffusion and double neutron/proton ratio in heavy ion reactions at intermediate energies leads to a quite accurate value of L = 58±18 MeV approximately independent of E（ρ）.This result allows us to rule out a number of nuclear effective interactions and also has important ramifications in neutron star physics.

关键词： Equation of state of asymmetric nuclear matter the symmetry energy the neutron skin heavy ion collisions

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Higher-order symmetry energy of asymmetric nuclear matter