"元数据模型"在数据提取中的实现

大量分散的形式及不同格式的数据给现代数据处理带来了越来越大的困难.为统一数据形式以利于数据操作和处理,讨论了将形式多样的数据格式转换成统一的XML(extensible Markup Language)格式的问题.在计算机网络中,应用"元数据模型"技术,对数据源中不同格式文件数据,按照预先定义的XML模板,以格式说明文件结构统一描述,并提取数据或作进一步的处理,最后转换为XML格式输出.设计了具体的实现策略以及实现流程:实现了从TXT文件格式数据中提取数据转换成XML格式的代码,将TXT文件数据提取成XML格式的数据;完成了数据说明文件格式的设计,数据路径选择工具的开发,语言分析工具的设计开发等工作.结果表明:能满足同类产品的按行(line)为单位的源数据结构形式处理,还具有同类产品不具备的非行(字符串和关键字)提取处理功能.     

基于GUI4J的界面自动生成技术

将XML技术应用到图形用户界面描述中,给出了一种新的图形用户界面自动生成方法,通过运用XML的特性,对界面元素进行规范化描述,通过GUI4J调用Java Swing组件库,动态生成基于Java Swing组件的图形用户界面.实践证明,将该方法应用于测试用例管理系统中,能够降低界面设计编程工作量,并在一定程度上提高软件的开发效率和可维护能力.     

XML文档向关系数据库的自动转换

XML作为一种与平台无关的数据表示形式已经成为数据交换的主流语言,而关系数据库是核心业务系统中最常用的数据库技术,本文介绍了XML文档与关系模型之间的对应关系,基于ASP.NET利用DOM提取XML文档信息数据,编程实现了XML文档到关系数据库的转换.     

XML文档与关系数据库的数据转换研究

可扩展标记语言(XML)作为一种与平台无关的数据表示形式,在企业应用程序中的使用正日益广泛,并成为web应用中数据传输与交换的标准,本文阐述XML与关系数据库的数据映射,并且讨论了SQLServer2000对XML的支持。     

异构数据库数据迁移测试软件的研究与实现

指出了数据迁移测试领域中存在的问题.开发了异构数据库数据迁移测试软件,该软件使用JDBC接口连接访问数据库,采用XML文档存储测试数据,并建立了多层数据源结构,利用JDOM应用编程接口解析XML文档获取测试数据.该软件开发过程更加符合开发者的编程习惯,实现了测试数据的可重用以及DML语句的动态生成,达到了利用软件对迁移结果进行自动化测试的目的.     

通用简报生成技术在遥感监测系统中的应用

在卫星遥感监测业务化运行系统中,简报是结果信息的重要载体.然而传统的简报生成工具存在强依赖于事先制定好的模板以及书签、不能重用等问题.在充分利用XML内容与形式分离这一特性的基础上,利用简报自动生成技术,设计并实现了从模板定制到简报生成的通用简报生成技术,为今后进行业务化运行提供技术支持.在卫星遥感监测业务化运行系统中的应用表明该技术是可行有效的.     

基于Web Services的分布仿真资源建模方法的研究与应用

在面向服务理念的指导下,将具有分布性、协同性和异构性的仿真资源以服务的形式提出。应用面向服务的SOA架构技术和Web Services技术,根据建模规范对模型进行抽象描述,提炼出形式化模型函数。通过XML和XML Schema定义模型的互操作语法和语义,生成与平台和技术无关的XML描述文件。经过XML解析器解析后,将结果输入与平台和技术相关的代码生成器并自动生成各平台代码,并通过实例演示。     

一种新的Web链接提取模型

以搜索引擎链接提取模块所要求的容错性、正确性、全面性、高效性和可扩展性为目标,提出了一种新的链接提取模型的设计思路。该模型将链接提取过程划分为信息提取、信息加工、信息分析和信息储存。信息的获取是通过HTM L(hypertex t m arkup language)文法分析方法从文档中得到初始统一资源地址(un iform resourceiden tifier,UR I)数据;信息加工阶段通过运用UR I解析算法对初始数据进行精练;然后在信息分析过程中进一步加以筛选和过滤;最后将结果存储在一个灵活的数据结构中。通过对比测试证实这种新的链接提取模式比传统方法在各项指标上均具有明显优势。     

XML语言及其扩展为Web提供全新的信息表示与处理技术

本对当今正在兴起的一种新的可扩展标记语言XML作了概述,在此基础上,结合实例讨论了与XML相关的扩展语言的功能,包括名域、查询和链接、XML Schema、可扩展样式表语言（SXL）等,最后说明了与XML有关的开发活动。     

模板化网页主题信息的提取方法

为了消除网页噪音,有效地提取基于模板的网页主题信息,提出了一种新的信息提取方法.该方法采用机器自动学习方式生成网页集的模板;以网页链接关系中的锚点文本作为提取目标对模板进行标记,生成对应模板的提取规则;依据模板的提取规则对网页主题信息进行提取.对国内2 588个新闻网页进行了检测.实验结果表明,该方法可以快速、有效地提取模板生成的网页集主题信息,准确率达99.5%.将该方法应用于搜索引擎系统(木棉检索)中,与原来的检索系统相比较,索引文件的大小减少约50%,检索的速度和精确度也得到提高.     

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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