基于XML的信息技术试题标记语言的设计与实现

文章介绍了基于XML的可扩展信息技术试题标记语言XitetML的设计与实现。XitetML充分运用XML的可扩展性和半结构化数据描述能力,解决了题库建设过程中的试题文本共享和交换问题。文中叙述了XitetMLSchema的设计过程,并对使用XSL样式单实现试题的不同呈现方式进行了讨论。     

基于XML的网上书店设计与实现

本文首先介绍了网上书店系统的功能设计,接着介绍了系统的XML数据存储结构,并通过XSL和ASP.NET等技术实现了基于XML的系统实现.所使用的基于纯XML文档和ASP.NET的技术方案有访问快捷、无数据库驱动、可移植性好和维护简单等特点.     

基于XML的考试系统

介绍了XML技术以及在线考试系统,对比XML与关系数据库在数据存诸方面的功能,利用XML实现对考试系统中的题库进行存储和管理,并提出了基于XML的考试系统模型。     

基于关系数据库的XML数据转换架构

针对应用系统的数据转换需求，分析数据转换的架构、XML数据在关系数据库中的存储，提出并论证了基于关系数据库的数据转换架构，并给出具体的实现算法。所提出的算法能比较完整地存储任何一篇XML文档，并较好地支持基于元素和文档片段的查询和检索。通过将XSL技术引入到该数据转换槊构中，在保证XML信息存储完备性的基础上，提高了在关系数据库中的查询检索速度。这种架构利用XML技术解决了进行各种数据转换带来的问题，实践证明该技术大大提高了系统的灵活性和可扩展性。     

基于XSL转换超媒体课件文档的研究与实现

基于XSL的转换技术提供了强大的机制和功能,可以实现多种文件变换.它具有部分高级编程语言的特征,因而利用XSL可以方便灵活地转换异构的超媒体XML文档.文中介绍了一个利用XML技术的超媒体课件系统,该系统使用XML保存课件内容,利用XSL来重新组织课件和指示课件对外表示的模式或风格,根据超媒体课件在不同场合不同情况下根据要求展现不同的外在风格和形式.通过应用XML及其XSL的超媒体文档格式转换,描述了基于XSL对超媒体课件文档的转换应用,并实现了基于XML的超媒体课件系统.     

基于XML的结构化电子病历系统设计

阐述了两种结构化数据采集的方法:自然语言处理(NLP)和结构化数据输入(SDE).基于上述两种方法,设计了一个结构化电子病历系统(EPR)的原型,用XML技术来描述和实现知识库,使用Microsoft.NET的XML数据流技术实现病历数据的输入、存储和展现,并使用XSL技术实现Web方式的病历浏览.设计表明,利用XML技术解决病历的自由输入并和结构化输入相结合,是可行的技术方案;它为电子病历的研究提供了新的途径.     

基于XSL转换超媒体课件文档的研究与实现

基于XSL的转换技术提供了强大的机制和功能,可以实现多种文件变换。它具有部分高级编程语言的特征,因而利用XSL可以方便灵活地转换异构的超媒体XML文档。文中介绍了一个利用XML技术的超媒体课件系统,该系统使用XML保存课件内容,利用XSL来重新组织课件和指示课件对外表示的模式或风格,根据超媒体课件在不同场合不同情况下根据要求展现不同的外在风格和形式。通过应用XML及其XSL的超媒体文档格式转换,描述了基于XSL对超媒体课件文档的转换应用,并实现了基于XML的超媒体课件系统。     

基于XSLT与SVG实现动态矢量WebGIS

设计了一种基于XSLT与SVG的动态矢量WebGIS实现方案。在该方案中,WebGIS服务器通过对客户端请求的分析,对于存储为XML/GML数据库的地理空间数据,通过XML查询进行数据抽取,接着对得到XML/GML文档进行整理,得到该文档对应的元数据,并通过查询GIS应用服务器上的XSL元数据库,得到该文档中元数据所对应的XSL元数据,然后将出现的XSL元数据进行集成,生成一个新的样式表（XSL）,根据这个样式表将XML/GML文档经XSLT转换转化为SVG图像,并经过GZIP压缩将其压缩为SVGZ格式传往客户端,从而实现了地理空间数据的矢量传输和显示。由于根据用户的请求动态下载数据生成包含SVGZ的Web页面传给客户端,所以这种WebGIS不仅安全可靠也具有较高的效率。     

利用XSLT转换XML文档的应用

XML实现了数据与表示的分离,需要通过样式表来显示XML数据.目前有两种常用的样式表格式CSS和XSL.本文首先讨论了CSS的不足和XSL的优势,然后介绍了XSL和XSLT转换语言,并深入讨论了XSLT的工作原理,最后结合水调工程中的一个实例,具体说明如何利用XSLT分别实现在浏览器和服务器端XML文档的转换.     

基于ASP.NET和XML的网络考试系统

网络考试系统是远程教育的重要组成部分.针对现行考试系统存在的开放性差的缺点,使用ASP.NET,XML等新技术,开发了基于Web的网络考试系统.通过把题库以XML文件格式进行导入和导出,达到了题库共享的目的.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

正~~