基于CLR的数据库对象开发研究

介绍了公共语言运行时CLR的概念,阐述了利用CLR组件实现的数据库对象在功能上的优势,重点讨论了在数据库中利用CLR技术进行数据库对象开发的方法.通过阶乘运算的实例,说明CLR技术适于对数据库进行功能扩展.     

面向对象数据库中的数据依赖和规范化

从分析面向对象数据库中的数据依赖着手，提出对象函数依赖概念，它反映了面向对象数据库中对象标识符，复杂对象及集合类型的特点，在对象函数依赖基础上，提出了分解为基础为模式规范化方法，并且特别引入语义相关集的概念，最后，给出类模式分解的形式化定义并证明了类模式的任一分解都是无损分解。     

一个异构数据库应用系统的开发环境

介绍了一个应用系统开发环境，此应用系统所面向的数据库是分布、异构的。开发环境提供了对各个结点数据库进行全局集成的操作模式。该模式是通过先构造关于应用问题定义和描述的模板参数文件，然后生成模板程序的统一方式来实现的。     

主动数据库及其应用的研究

介绍一个把规则系统与ＯＲＡＣＬＥ关系数据库管理系统结合在一起而形成的主动数据库管理系统ＲｕＢＤＢＭＳ。规则子系统ＲｕＭＥＳ用Ｃ语言实现，我们定义一种规则语言语法作为ＳＱＬ的扩充，规则由数据库的变化来触发，规则的条件和动作部分依赖于当前数据库状态以及数据库的变化值，ＲｕＭＥＳ为数据库应用程序开发提供了一个规则语言工具，使之能完成数据库一致性完整性约束的自动维护及其它特殊目的的数据库管理功能。     

对象数据库的几个主要概念

针对最近流行的对象数据库产品，对对象数据库所涉及的若干基本概念给予了概要的阐述，同时介绍了当今对象数据库的标准及其发展情况。     

ODL与E/R图的比较

近年来面向对象的数据库建模方法是数据库方向的热点问题。本文将通过实例，主要对面向对象定义语言ODL作个讨论，将其与E／R图进行比较，最后从数据库建模方向，说明各自的特点和走向。     

一个异构数据库应用系统的开发环境

介绍了一个应用系统开发环境，此应用系统所面向的数据库是分布、异构的．开发环境提供了对各个结点数据库进行全局集成的操作模式．该模式是通过先构造关于应用问题定义和描述的模板参数文件，然后生成模板程序的统一方式来实现的。     

Powerbuilder在数据库应用系统前端开发中的探讨

文章介绍了PB进行数据库应用系统前端开发的步骤以及若干技术，对实现PB应用程序与数据库通信的事务对象的创建及其属性定义给出相应的脚本片断：并分析比较PB进行数据库访问的几种形式及实现数据库访问的脚本片断。     

利用模板实现持久类

介绍了利用模板技术在母语中定义持久类的实现方法，该方法通过抽象持久类的一般特必 义出持久类的共同的类模板，定义持久类的过程就是由类模板生成模板类的过程。该方法完全区分持久语义和挥发语义，能很好处理属性的多态性，易于管理性持久对象，为最终实现面向对象数据库和持久性程序设计语言提供了很好的基础。     

利用模板实现持久类

介绍了利用模板技术在母语中定义持久类的实现方法．该方法通过抽象持久类的一般特性定义出持久类的共同的类模板，定义持久类的过程就是由类模板生成模板类的过程．该方法完全区分持久语义和挥发语义，能很好地处理属性的多态性，易于管理持久对象，为最终实现面向对象数据库和持久性程序设计语言提供了很好的基础     

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     

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