基于Z39.50协议的编目工作注意事项初探

Z39.50作为网络环境下书目数据的检索协议，随着图书馆数字化的深入发展，在编目部门中得到了广泛运用。从查询方式、提取数据、套录方式、补充著录等几个方面分析了利用Z39.50协议著录MARC记录过程中容易出现的一些具体问题，并提出了应对策略。     

几种馆际互借协议之比较与探讨

主要介绍了Z39.50Itemorder和ILL(InterlibraryLoan)这两种应用于馆际互借的协议 ,同时对这两种馆际互借协议进行比较并分析其优缺点 .最后 ,简要介绍了最新的馆际互借协议———Z39.83协议 ,同时对新、旧协议开发的系统进行比较 ,得出新协议相比较旧协议而言的改进之处     

基于Z39．50图书馆文献信息网络化及资源共享刍议

Z39.50是一种通过因特网共享数据的信息传播标准,为图书馆资源提供了一种有效的网络环境。本文着重探讨Z39.50客户端的功能与应用以及图书馆信息网络化及资源共享发展前景等。     

对我国OPAC发展定位的探讨

介绍了OPAC及在我国的现状,指出了我国OPAC的发展方向;基于INTERNET和WWW方式,支持Z39.50协议,强化主题信息,检索内容更为广泛,具备多种检索机制,支持自然语言检索,参考咨询功能更强,具备馆际互借功能。     

对我国OPAC发展定位的探讨

介绍了OPAC及在我国的现状，指出了我国OPAC的发展方向；基于INTERNET和WWW方式，支持Z39.50协议，强化主题信息，检索内容更为广泛，具备多种检索机制，支持自然语言检索，参考咨询功能更强，具备馆际互借功能。     

Z39．50标准在数字化文献信息服务中的应用

介绍了Z 39.50标准,阐述了其工作原理与服务功能,分析了Z 39.50标准在数字化文献信息服务中的应用。     

基于检索协议的元数据互操作研究

在对元数据和元数据的互操作的概念进行阐述的基础上,指出基于OAI和Z39.50技术的两种元数据互操作方法是基于检索协议的主要元数据互操作方法,并对这两种元数据操作进行了详细的分析.     

万维网资源整合工具——OpenURL

OpenURL是万维网URL(统一资源定位器 )方法的改进和发展 .OpenURL框架有三要点 :解析服务器以作为用户与所求资源之间的中介 ,基于Get Post方法的一套句法标准以表达用户信息需求和网络环境 ,以及开放性结构以容纳各方资源 .OpenURL克服了传统URL的缺陷 ,能够把各种万维网资源有效地联接起来 ,为用户提供充分的便利 .ANSI NISOZ39.88标准草案 2 0 0 3年修订版描述了OpenURL框架结构及实现OpenURL的具体细节 .该标准草案规定 ,OpenURL描述和传输一种叫做资源环境对象的信息结构 ,该结构含有 6种信息实体 :所指资源、资源指示者、对象产生者、解析服务器、服务请求者与服务类型 .Z39.88协议与著名的Z39.50协议相比 ,它更实用、更简单、功能更强大 ;所以它很有可能取代Z39.50 ,成为网络资源整合的首选方法     

基于Z39.50的在线数字图书馆(DLs)互操作模型的设计

提出了一个基于Z39.50实现在线数字图书馆(DLs)互操作的实例,使用户能够一次检索多个DLs。     

ZTRANS在ILASⅡ文献采访工作中的应用技巧

通过介绍ZTRANS这一通用Z39.50前端软件的特点,结合文献采访工作实践,详细论述了使用该软件的具体方法和技巧,以期对图书馆的采访工作有一定的指导意义。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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