元数据在数字图书馆中的应用

文章从数字图书馆的信息资源组织人手,介绍了数字图书馆和元数据的概念以及信息资源描述的元数据格式即都柏林核心元素集,重点探讨了元数据在数字图书馆的应用及应当注意和解决的问题.     

元数据、都柏林核心集与网络资源编目

开发元数据是为了对网络信息资源进行有效描述(著录).元数据、都柏林核心集以其简洁、灵活、通用、可扩展等特点开始被图书馆界应用于网络资源编目.都柏林核心元素和XML/RDF在网络资源编目中的实际应用,具体体现在著录项目和著录格式两方面.     

网上图书元数据描述研究

文章讨论了图书领域元数据描述规范,介绍了都柏林核心元素集（DC）和机读目录格式（MARC）,结合了现有图书信息元数据标准,最终建立了网上图书领域元数据描述规范,并实现了使用该元数据规范对图书实例进行XML描述。     

数字博物馆元数据标准初探

元数据是数据的数据，可为各种形态的数字化信息单元和资源集合提供规范、普遍的描述方法和检索工具。数字博物馆的元数据对于数字博物馆实体性藏品及其数字化信息资源的生成、描述、标引、检索、管理、利用、复用等，具有十分重要的意义。目前在国内外，尚未形成相对统一的博物馆元数据标准规范。采用文献调查法，探讨元数据对于数字博物馆的意义，考察国际上较为成熟的数字博物馆元数据标准，包括都柏林核心，CDWA，VRA Core等元数据，介绍了元数据与XML语言之间的转换机制，并提出我国数字博物馆建设中发展元数据标准的几点初步设想。     

浅谈元数据与网络资源组织与管理

以都柏林核心数据与USMARC为例，阐述了用元数据组织网络信息资源的方法介绍了我国在元数据及网络资源组织领域取得的进展。     

DC元数据——组织网络信息资源的有效工具

DC元数据是一个用于描述网络信息资源的元数据核心集.本文介绍了DC产生的背景、组成元素、描述方法以及实践应用情况.     

数字图书馆的元数据检索技术的研究与实现

文章首先介绍了当前数字图书馆的定义．元数据的重要性．结合我们研究所承担的某高校数字图书馆项目的实际情况，详细分析了都柏林核心数据的特点．设计出了数字资源的元数据结构和基于元数据的检索系统。     

都柏林核心元数据和机读目录在电子图书编目中的比较研究

介绍了电子图书和机读目录的特点,阐述了都柏林核心元数据的理念和特点,探讨了都柏林核心元数据和机读目录（MARC）在电子图书编目方面的应用和比较。     

科研管理信息资源核心元数据的研究

随着信息技术的不断发展,科研管理信息系统已经实现了业务的信息化。然而这些系统无法进行信息交流,导致了“信息孤岛”的现象。业务间关联使得科研管理需要进行数据交换,因此有效解决数据集成问题具有重要的现实意义。而元数据中包含的数据结构和语义说明信息是数据集成的重要信息,因此元数据建设是数据集成关键技术。本文以都柏林核心元数据DC（Dublin Cord）、中国科学院科学数据库核心元数据标准2.0 和政务信息资源目录体系为主要参考依据,结合科研管理信息资源的特点,研究确定了科研管理信息资源核心元数据主要内容,并分析了其在科研信息资源管理平台中的作用以及其工作流程。     

科研管理信息资源核心元数据的研究

随着信息技术的不断发展,科研管理信息系统已经实现了业务的信息化。然而这些系统无法进行信息交流,导致了“信息孤岛”的现象。业务间关联使得科研管理需要进行数据交换,因此有效解决数据集成问题具有重要的现实意义。而元数据中包含的数据结构和语义说明信息是数据集成的重要信息,因此元数据建设是数据集成关键技术。本文以都柏林核心元数据DC（DublinCord）、中国科学院科学数据库核心元数据标准2．0和政务信息资源目录体系为主要参考依据,结合科研管理信息资源的特点,研究确定了科研管理信息资源核心元数据主要内容,并分析了其在科研信息资源管理平台中的作用以及其工作流程。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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