XML在Web Services中的应用与研究

针对传统的Web应用开发所面临的问题,通过对比与分析传统的Web开发方式和基于XML技术的Web应用开发方式,提出了一种新颖的基于XML技术的Web开发方式。该基于XML技术的Web开发方式与传统的Web开发方式相比,其具有的最大优点是:能够解决Web Services中业务系统抽象、统一多种业务受理流程、分隔显示逻辑与业务逻辑、构建灵活的数据交换、提供具有方便快捷的二次开发、提高Web应用开发的效率,从而以适应越来越复杂的Web应用系统的开发需求。     

基于ASP.NET的Web应用系统架构探讨

提出了一种基于ASP．NET开发方式的四层架构的Web应用系统构造思想。其基本内容是：将面向对象的UML建模与Web应用系统开发相结合，将整个系统分成适合ASP．NET开发方式的应用表示层、业务逻辑层、数据访问层和数据存储层四层结构。以此方式构造的Web应用不仅达到了代码组织结构清晰明朗、高重用性、适用性，易于维护和移植的目标，而且可以提高web应用系统的开发速度。解决了目前大型Web程序开发中，代码适用性、重用性差，及难于维护和移植的问题。     

基于AJAX的富客户端技术及应用

AJAX即异步的JavaScript与XML,利用JavaScript、HTML、DOM技术进行Web富客户端设计,后台异步执行与服务器的交互,不会因为交互而中断用户对屏幕的操作,可提供更好的服务响应。AJAX使得基于Web的传统客户端设计,达到与单机GUI方式同样的效果,对基于Web的分布式系统设计产生了重要影响。通过与传统的Web开发方式进行对比,详细介绍了AJAX的核心技术和使用AJAX开发Web应用系统的基本原理。     

基于ASP.NET的Web应用系统架构探讨

提出了一种基于ASP.NET开发方式的四层架构的Web应用系统构造思想。其基本内容是:将面向对象的UML建模与Web应用系统开发相结合,将整个系统分成适合ASP.NET开发方式的应用表示层、业务逻辑层、数据访问层和数据存储层四层结构。以此方式构造的Web应用不仅达到了代码组织结构清晰明朗、高重用性、适用性,易于维护和移植的目标,而且可以提高Web应用系统的开发速度。解决了目前大型Web程序开发中,代码适用性、重用性差,及难于维护和移植的问题。     

基于四层架构的Web事务处理系统开发方法研究

本文讨论了如何采用层次架构来设计Web应用系统,将一个Web系统分为显示层、程序逻辑层、业务逻辑层和数据访问层;以及在开发过程中采用并行开发方式是提高Web应用系统开发效率和可维护性。     

基于.NET的Web框架在用电信息采集系统中的应用

针对传统ASP、PHP、JSP等技术开发的Web应用系统层次不够分明、业务分工不够明确等不足,结合MVC设计模式、Ext JS、Spring.NET和对象持久化NHibernate等技术,提出了一种基于.NET平台的Web应用程序框架,并结合实例详细分析了该应用框架在用电信息采集系统开发中的应用。基于该框架开发的用电信息采集Web应用系统面向接口编程,细化了传统三层式结构的软件开发,实现了页面显示逻辑、业务应用逻辑和数据访问逻辑的高效分离,具有松耦合性以及很强的可扩展性。     

基于组件的计算机辅助工艺规划与管理系统

本文介绍了一个基于组件的计算机辅助工艺规划与管理系统（CAPPM），包括：工艺规划、技术文档、产品结构和数控程序管理子系统．系统采用基于Web的Windows DNA结构，建立了一组包括外观类、业务逻辑类和数据库访问类的业务逻辑组件．当外部环境变化时，用户可根据实际需求，定制满足生产要求的CAPPM系统，提高了系统的重用和重构能力．系统采用可扩展标记语言XML通讯，增强了Web环境下系统信息交互的性能．目前，CAPPM系统正在沈阳第一机床厂应用．     

基于.NET的Web应用框架的设计与应用

针对当前Web应用系统层次不够分明、结构不够清晰等不足,结合MVC设计模式和对象持久化技术,提出了一种基于.NET平台的Web应用框架.将传统的三层式的软件开发细化,在显示层将显示逻辑与应用逻辑相分离,将数据访问从业务逻辑中分离出来,使得基于框架的Web应用系统开发更加灵活,便于业务逻辑的测试、修改和重用,提高了系统的可移植性.最后,结合实例说明该框架的设计及应用.     

XML与关系数据库的数据转换接口的实现

随着计算机和Web技术的发展,XML技术在异构系统及数据库间实现信息的高效传输、交换、共享并保证数据的完整性上发挥着越来越重要的作用。在应用系统中利用上述接口模块进行XML数据与关系数据库中表格记录的相互转换可以减少编码的重复,同时由于屏蔽了低层数据库的差异和转换的过程,使得实际开发中可以专注于其他核心业务逻辑的处理,具有一定的应用价值。     

基于XML的Web逻辑层跟踪数据库的应用

应用XML及相关技术跟踪数据库，利用Microsoft．NET平台上的C#语言，快速生成B／S体系结构的Web应用程序开发的业务逻辑层(中间件)。     

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.     

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)

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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