电信行业的元数据集成研究

为了解决电信行业中数据交换和集成的问题，从电信行业的实际出发，研究了元数据的概念、模型驱动的元数据集成规范公共仓库元模型（CWM）的结构，讨论了CWM在电信行业的元数据集成体系架构、元数据建模方法、元数据交换模式的开发步骤以及元数据适配器的构造方法等前沿问题，给出了CWM模型在电信行业中应用的可行方案。     

实时元数据管理的软件体系结构研究

针对数据仓库环境中元数据互操作困难和老化的问题，提出了一种实时分布式元数据管理的软件体系结构．通过对元数据管理模式的分析，基于公共仓库元模型(CWM)规范，以CWM元模型规定的元数据集成、交换内容，用XML元数据交换提供实时元数据交换和共享机制，结果使每个异构软件成员仅需对应一个接口驱动程序即可实现分布式元数据的动态读取和集成．利用模型管理算子，在模型的抽象层次上讨论了模式集成和进化的实现过程．在原型实验中，所有实时操作都在10s内完成，这验证了在该体系结构下元数据的互操作性和实时分布式存取的可行性、有效性。     

数据仓库元数据的集成及管理

元数据是数据仓库项目取得成功的关键因素之一,而元数据规范又是成功管理元数据的关键,根据公共元数据模型（CWM）的标准对基于元数据模型的数据仓库进行集成,能有效解决以往元数据互操作的复杂性问题。     

基于CWM的元数据集成中交换模式的研究

企业数据集成是解决"信息孤岛"的关键和重点,基于CWM的企业元数据集成是企业数据集成的一种有效途径.该文分析了CWM在企业元数据集中的缺陷,提出了基于模式思想的解决方案--元数据交模式,并给出了元数据交换模式的求解过程.     

基于CWM的企业元数据集成中对象到关系映射模式的研究

公共仓库元模型(CWM)是为数据仓库和业务分析环境间方便地交换元数据而制定的一个标准,并已经成为模型驱动体系结构(MDA)新策略方向中的核心组成部份.本文介绍了基于CWM的企业元数据集成,设计了一个对象到关系的映射模式,并给出了映射模式的应用实例.     

基于CWM的元数据储存库设计

利用CWM标准,提出数据仓库元数据管理系统实现方案,并给出系统的体系结构和简单功能描述。着重介绍了该实现方案的元数据存储库MetaStore设计,它应用"对象关系映射"技术,建立在关系数据库上,不仅解决了CWM中类、关联和继承在库中的实现,而且与数据仓库构建模式紧密结合,能够集成多个主题的不同数据仓库的元数据。     

元数据存储框架及服务发布

本文的目的就是要寻找出一套有效的,低成本的,易于管理的模型集成的方法。首先,论文系统研究了MDA建模体系结构,特别是对CWM（公共仓库元模型）基本理论的研究,分析了模型转换的定义、规则及其特征。其次,对元数据存储库概念以及基本特征进行了分析,进而提出了一个元数据存储库框架的构想,最后,对元数据存储库中的数据如何在Web上的发布的模式进行了研究。     

模型与GIS集成理论初步研究

探讨了模型与地理信息系统的集成问题，指出问题的实质是对象状态数据模型、对象模拟模型和对象分析处理模型的综合表达与处理．提出了建立在元数据和元模型基础上的二层次集成方案．首先把对象状态数据模型、对象模拟模型和对象分析处理模型以规范化的元数据和元模型形式表达出来，在此基础上实现的地理信息系统、模型库管理系统和空间分析处理系统也就能提供基本的数据集成和功能集成．其次，提出了基于数据流机制的应用集成方案，满足能把应用方案数据流图化的综合性集成应用的需要．     

分析型CRM技术在电信行业中的应用研究

本文根据目前电信行业的最新进展以及现有特点,在保护电信运营商的前期投资的前提下,提出了基于数据仓库、数据挖掘技术的分析型CRM模型,这些技术与模型为解决信息孤岛问题、大客户挖掘与评价问题等电信行业普遍存在的重大问题。     

基于SOA的制造企业信息系统集成模型研究

随着计算机辅助管理系统在制造企业的大量应用,为企业提升信息化水平的同时也带来了"信息孤岛"问题。如何对这些系统进行有效集成成为一个重要问题。本文对国内外学者在信息系统集成方面的研究做了分析总结,在此基础上提出基于面向服务架构的信息系统集成模型。该模型包括界面层、总线层、服务层、数据层四层体系结构。给出了该集成体系的信息访问模型和网络集成模型,介绍了其信息交互机制。最后,对集成过程中集中权限管理、元数据适配、可重构的服务、多服务运行机制等关键技术进行了详细阐述。     

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

正~~