Web应用服务器中Web Service引擎的设计与实现

Web Service为程序之间的交互提供了基础，实现了独立于程序设计语言的一致化编程模型，并以通用的方法进行应用程序集成。分析了Web应用服务器实现Web Service的关键需求，阐述了在应用服务器中基于SOAP的Web Service引擎的设计与实现，介绍了实现Web Service引擎的若干关键技术和解决办法。Web Service引擎已在自主研发的OnceAS应用服务器中实现。     

面向Java手机Web Service技术应用集成研究

针对Java手机Web Service应用集成问题，通过分析现有Web Service的体系结构，以及Java手机硬件平台的相关技术，提出并实现了两种面向Java手机Web Service技术的应用集成方法，并对这两种方法的性能作了比较。     

通过Web Service实现异构系统访问构架

WebService是Internet上新兴的应用通信和集成技术。文章简单介绍了分布式异构数据库的概念，结合XML和Web Service技术，着重讨论了基于Web Service的异构数据库系统集成技术的特点和优势，通过实际开发案例介绍了基于Web Service的异构系统集成技术在系统实现中的应用。     

网络化制造系统中资源信息集成方法的研究

分析了网络化制造系统中的资源信息集成的必要性。介绍了Web Service技术的特点，论述了用Web Service技术解决资源信息集成的方案及其可行性和有效性。根据成、德、绵区域网络化制造系统中的资源信息集成的开发实践，详细介绍了基于Web Service的资源信息集成系统的设计和实现过程，并给出了核心代码和运行实例。     

Web Service运行管理平台的研究与实现

Web Service技术为异构应用之间的集成和互操作提供了有效的解决手段，目前多数Web Service平台仅支持SOAP消息的解析，尚未考虑SOAP的多种绑定方式、安全扩展保证和多种功能实现方式的集成等共性处理需求。因此，提出并研制一个层次化的Web Service运行管理平台，通过抽象出运行时对象作为Web Service共性问题处理的基础，设计可配置、可扩展的链式处理结构满足Web Service处理需求的变化，并提供集成不同业务功能的统一接入方式，成为支撑基于Web Setvice应用的基础和关键。     

基于SOA架构集成企业信息系统

讨论了企业应用集成SOA架构的体系组成,及其相对于传统几种企业应用集成EAI解决方案的技术优势所在,针对SOA架构的实现手段之一Web Service,提出了三种Web Service结构的构造方法,给出了某公司应用Web Service实现SOA集成的实例,来充分论证SOA在系统集成中的重要作用。     

基于Web Services的视频监控模式研究

Web Service提供了一种分布式的、与平台无关的应用程序集成机制，使得系统设计能够以更加灵活的方式进行。基于Web Service的视频监控系统更方便、更透明地实现了系统中各分布应用对象之间的互联互操作，有效地实现了大型分布式监控系统的集成，提高了应用编程的开发效率。本文提出一种基于Web Service的视频监控应用模式，分析和解决了大型分布式监控系统在网络环境异构中难以集成的问题。     

基于包装技术的Web Service与MAS集成

针对Web Service与Agent两种技术存在的互补性，提出利用包装技术，将Web Service组件集成到多agent系统(MAS)的方法，设计了集成系统的体系结构，用Java语言来实现包装Agent的结构体系，实现Web Service的智能化和MAS的跨平台交互。     

基于Web Service的系统集成技术在校园一卡通中的应用研究

Web Service是Internet上新兴的应用通信和集成技术，本文先简单介绍了XML和Web Service技术，接着讨论了基于Web Service的系统集成技术的特点和优势，最后着重讨论用Web Service技术来对校园一卡通中集成第三方系统的研究。     

Web Services构架下的空间应用集成框架

基于XML，Web Service，Ontology等技术的PAI集成框架包括Web应用层、集成层、分布的服务层和分布的信息层4层．其中集成层含有集成总线及Adapter Service、元数据库和集成协调器与供二次开发的API及Web Service工具集，它实现了数据互操作、软件互操作与语义互操作．集成总线是一组面向领域的编码标准与通信协议，是集成框架的核心；与总线标准不符的遗留系统和其他相关系统只需编写．Adapter Service就能被集成；元数据库用于管理系统中的所有信息与应用服务，屏蔽信息及服务的分布性与异构性；集成协调器用于数据的更新和元数据的管理；Ontology用于定义描述领域相关元数据的术语；数据交换格式与通信协议均用XML定义；所有应用通过SOAP协议实现互操作．该集成框架实现了大规模空间信息及服务的动态集成，能保护已有投资，并能集成网上丰富的商业Web Service，是一个开放的可扩充的框架．文中还介绍了PAI集成框架实现的初步成果，并给出了该框架的一个应用实例——基于PAI集成框架的基于位置的服务。     

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