检索结果-南通市图书馆

Communications in Theoretical Physics 2008年第8期50卷 303-308页

作者： BAI Cheng-Jie zhao hong HAN Ji-guang School of Communication Shandong Normal University Jinan 250014 China School of Physical Science and Information Engineering Liaocheng University Liaocheng 252059 China

A new approach is presented by means of a new general ansitz and some relations among Jacobian elliptic functions, which enables one to construct more new exact solutions of nonlinear differential-difference equations. As an example, we apply this new method to Hybrid lattice, diseretized mKdV lattice, and modified Volterra lattice. As a result, many exact solutions expressible in rational formal hyperbolic and elliptic functions are conveniently obtained with the help of Maple.

关键词： nonlinear differential-difference equations new approach exact solutions

Dynamical Process of Dissociation of Excitons in Polymer Chains with Impurities

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第9期28卷 221-224页

作者： zhao hong-Xia zhao Hui CHEN Yu-guang Department of Physics Tongji UniversityShanghai 200092

Within an extended Su–Schrieffer–Heeger model including impurity interactions,the dynamical process of exciton dissociation in the presence of an external electric field is investigated by using a non-adiabatic evolution *** the action of impurities,the stability as well as the effective mass of the exciton is *** results show that the field required to dissociate the excitons depends sensitively on the strength of the impurity *** the impurity potential strength increases,the dissociation field decreases *** theoretical results are expected to provide useful predictions concerning which polymers with properly impurity-assisted interactions are likely to be more suitable for use in organic solar cells.

关键词： potential method dissociation

Structure and mechanical properties of Zr/TiAlN films prepared by plasma-enhanced magnetron sputtering

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2015年第10期34卷 717-724页

作者： guang Xian Hai-Bo zhao hong-Yuan Fan Hao Du School of Manufacture Science and Engineering Sichuan University The Analysis and Testing Centre Sichuan University

The purpose of this study was to investigate the effects of Zr interlayer on the structure and mechanical properties of TiAlN films, which were deposited on the M2 high-speed steel substrates by means of plasma-enhanced magnetron sputtering. The result shows that the crystal orientation of Zr/TiAlN films is similar to that of single-layered TiAlN films, but the difference is that AlN(111) of Zr/TiAlN films disappears completely. With respect to Zr interlayer, the texture coefficient of Zr/TiAlN films is approximately 1. Zr/TiAlN films exhibit a compact isometric structure, which is distinctly different from the columnar structure existing in the single-layered TiAlN films and Ti/TiAlN films. The hardness and H3/E*2 of Zr/TiAlN films are, respectively, enhanced to be 36.6 GPa and 0.147. With a few cracks emerging around the indention, the adhesion strength of TiAlN films is obviously advanced by adding Zr metal interlayer.

关键词： TiAlN films Structure Orientation Hardness Adhesio

基于Internet的《数据结构》网络课程的设计实现

在线全文

学校读者我要写书评

暂无评论

微机发展 2004年第10期14卷 107-109页

作者：夏红霞杨红云赵广辉武汉理工大学计算机科学与技术学院湖北武汉430070

信息技术的发展对现代远程教育的开展起到了积极的促进作用,设计和开发优质的网络课程是当今远程教育中面临的一个重大课题。《数据结构》课程作为计算机专业学生学习的一门专业基础课,由于其概念性强、算法复杂,不易为学习者所掌握等因... 详细信息

信息技术的发展对现代远程教育的开展起到了积极的促进作用,设计和开发优质的网络课程是当今远程教育中面临的一个重大课题。《数据结构》课程作为计算机专业学生学习的一门专业基础课,由于其概念性强、算法复杂,不易为学习者所掌握等因素,使得开发一套具有良好界面、个性化学习环境、生动形象的算法描述的网络课程显得很有意义。文中详细介绍了在软件工程生命周期理论指导下,《数据结构》网络课程的设计目标、设计过程,并选用***和***等作为开发技术来具体实现。

关键词： Internet 数据结构网络课程 ***

Applications of Extended Hyperbolic Function Method for Quintic Discrete Nonlinear SchrSdinger Equation

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3期47卷 474-478页

作者： zhao hong HAN Ji-guang WANG Wei-Tao AN hong-Yong School of Physical Science and Information Engineering Liaocheng University Liaocheng 252059 China

By using the extended hyperbolic function method, we have studied a quintic discrete nonlinear Schrodinger equation and obtained new exact localized solutions, including the discrete bright soliton solution, dark soliton solution, bright and dark soliton solution, alternating phase bright soliton solution, alternating phase dark soliton solution, and alternating phase bright and dark soliton solution, if a special relation is bound on the coefficients of the equation.

关键词： extended hyperbolic function method quintic discrete nonlinear Schr6dinger equation discretesolitons alternating phase

Molecular simulation study of the microstructures and properties of pyridinium ionic liquid[HPy][BF_(4)]mixed with acetonitrile

在线全文

学校读者我要写书评

暂无评论

原子与分子物理学报 2025年第4期42卷 27-32页

作者： XU Jian-Qiang MA zhao-Peng CHENG Si LIU Zhi-Cong ZHU guang-Lai Department of Physics School of Physics and Electronic InformationAnhui Normal UniversityWuhu 241002China

The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this *** following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution *** results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient ***,the excess molar volume initially decreases,reaches a minimum,and then *** rules of radial distribution functions(RDFs)of characteristic atoms are *** increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then *** indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.

关键词： Pyridinium ionic liquids Thermodynamic properties Molecular dynamics simulation Radial distribution functions

Terahertz Metamaterial Sensor Based on Electromagnetically Induced Transparency Effect

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2015年第2期13卷 117-121页

作者： Shao-Xian Li hong-Wei zhao Jia-guang Han Center for Terahertz wave Key laboratory of Opto-electronic Information Science and TechnologyMinistry of EducationCollege of Precision Instrument and Optoelectronics EngineeringTianjin University Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of Sciences

A terahertz metamaterial sensor adopting the metamaterial-based electromagnetically induced transparency（EIT） effect is presented for determining the 1,4-dioxane concentration in its aqueous solution. The metamaterial sensor, which consists of an EIT element unit with a cut-wire metallic resonator and two split-ring metallic resonators fabricated on a 490-μm thick silicon substrate, operates in a transmission geometry. The EIT peak was red-shifted and decreased with the increase of the water volume. A maximum redshift about 54 GHz of the EIT peak was detected between the 1,4-dioxane and water. The presented linear behavior and high sensitivity of the EIT peak depending on the water concentration pave a novel avenue for sensor applications.

关键词： metallic terahertz resonator transparency determining fabrication split shifted aligned lithography

Influence of Lamellar Direction in Pearlitic Steel Wire on Mechanical Properties and Microstructure Evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第12期23卷 1290-1296页

作者： Tian zhang zhao guang-liang ZHANG Shi hong ZHANG Ling-yun ZHANG Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process Shenyang Aerospace UniversityShenyang 110016LiaoningChina School of Mechanical Engineering Taizhou UniversityTaizhou 318000ZhejiangChina Institute of Metal Research Chinese Academy of SciencesShenyang 110016LiaoningChina

During cold drawing of pearlitic steel wire, the lamellar structure becomes gradually aligned with the draw ing axis, which contributes to the ultra high strength. A direct simulation about the mechanical behaviors and microstructural evolution of pearlitic lamellae was presented. A representative volume element （RVE） containing one pearlitic colony was established based on the real transmission electron microscope （TEM） observation. The deformation of pearlitic colony during tension, shear and wire drawing were successfully simulated. The numerical results show that this metallographic texture leads to a strong anisotropy. The colony has higher yielding stress when the la mellar direction is parallel and perpendicular to the tensile direction. The lamellar evolution is strongly dependent on the initial direction and deformation mode. The formation of typical period shear bands is analyzed. In the wire draw ing, the pearlitic colony at the sub surface experiences a complex strain path： rotation, stretching along the die sur face, and rotation back.

关键词： pearlitic lamellae steel wire drawing mechanical property representative volume element

Fracture Characteristics of Fully Pearlitic Steel Wire in Tension and Torsion

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第11期23卷 1206-1212页

作者： Tian-zhang zhao guang-liang ZHANG Shi-hong ZHANG Ling-yun ZHANG Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process Shenyang Aerospace University School of Mechanical Engineering Taizhou University Institute of Metal Research Chinese Academy of Sciences

The fracture characteristics of fully pearlitic steel wires with fine and randomly oriented lamellae have been investigated after tension and torsion, respectively. It is found that the predominant fracture mode under small pre- deformation is dimple. The analysis of the colony size and the lamellar structure near the fracture surface indicates that each dimple roots from one colony. A simulation of tensile deformation with several pearlitic colonies based on the real scanning electron microscopy （SEM） observation shows that the plastic deformation concentrates and the stress t^hxialit~＂ is larger ~it the boundaries bf colonies. It demonstrates the microe/＇a^ks initialize at colony boundaries. Thus, the colony size is a significant factor for fracture behaviors under small pre-deformation. On the other hand, the fracture surface is investigated after large pre-deformation via torsion. The results show that fracture characteristics vary with radius from dimples, elongated dimples to the fibrous structure. It indicates that the fracture charac-teristics are dependent on the pre-deformation. The fracture mode under large pre-deformation becomes an anisotropic fibrous structure instead of dimples.

关键词： fracture pearlitic steel wire tension torsion

在线全文

学校读者我要写书评

暂无评论

萝卜辣味与黑芥子酶

潍坊学院学报 2011年第6期11卷 77-81页

作者：刘春香李洪涛赵光强潍坊学院山东潍坊261061

综述了与萝卜辣味有关的各种因素。介绍了辣味物质的化学成份、性质、种类、分布及影响辣味物质形成的环境因素;简要描述了辣味物质的的合成途径;辣味物质对植物自身的防御作用和其他功能以及对人体的生理功能;详细介绍了黑芥子酶及其... 详细信息

综述了与萝卜辣味有关的各种因素。介绍了辣味物质的化学成份、性质、种类、分布及影响辣味物质形成的环境因素;简要描述了辣味物质的的合成途径;辣味物质对植物自身的防御作用和其他功能以及对人体的生理功能;详细介绍了黑芥子酶及其基因的研究现状,并就黑芥子酶基因与萝卜辣味的调控方面做了展望。

关键词：萝卜辣味黑芥子酶