应用SOAP协议跨网络存取数据的实现

简单对象访问协议（Simple Object Access Protocol,SOAP）通过一种基于XML（Extensible Markup Language）,与平台无关的方法规划网站,从而提高Internet的互操作性。介绍了SOAP协议相关技术,重点论述了应用SOAP协议跨平台,跨局域网存取数据的实现过程,并对其优点进行了探讨。最后,讨论了进一步研究的工作。     

基于SOAP的异构系统集成的研究与应用

应用系统的异构集成成为Web的重要应用,而目前主流DCOM等中间件技术不能用于异构系统间的通信.简单对象访问协议SOAP作为一种新的与平台无关的通信协议,将其运用于企业的分布式环境中可以实现异构系统信息的交换.分析了SOAP并利用SOAP实现了异构系统的集成.     

基于SOAP的KQML语言通信的研究与实现

SOAP作为一种新的与平台无关的通信协议,可以实现异构系统间信息的交换,使得各种孤立系统的通信变得容易。本文在分析SOAP、Web Service等技术的基础上,结合KQML语言提出了一种基于SOAP协议的KQML语言通信实现方法。     

基于SOAP协议的Agent通信语言的研究

Agent通信语言是实现多Agent系统交互与合作的基础。SOAP作为一种新的与平台无关的通信协议,可以实现异构多信息的交换,使得各孤立系统的通信变得容易。文中在分析Agent通信语言,XML,SOAP,WebService等技术的基础上,结合KQML语言提出了一种基于SOAP协议的Agent通信实现方法,这种方法的消息结构由三层组成:SOAP层、KQML层和内容层。并分析了这种三层结构的消息表示的优势及其在实际系统中的应用。     

基于SOAP的应用集成方案

简单对象访问协议（简称SOAP）提供了在无中心分布式的环境中对等实体间使用XML交换结构化有类型数据的简单、轻量的机制，简单、扩展方便的特点使其可以适用于多种系统，在应用集成方面有着独特的优势。本文介绍基于SOAP的应用集成方案，并具体介绍其实现过程。     

基于SOAP协议的Agent通信语言的研究

Agent通信语言是实现多Agent系统交互与合作的基础.SOAP作为一种新的与平台无关的通信协议,可以实现异构多信息的交换,使得各孤立系统的通信变得容易.文中在分析Agent通信语言,XML,SOAP,Web Service等技术的基础上,结合KQML语言提出了一种基于SOAP协议的Agent通信实现方法,这种方法的消息结构由三层组成:SOAP层、KQML层和内容层.并分析了这种三层结构的消息表示的优势及其在实际系统中的应用.     

云平台分布式智能感知物联网应用开发

为克服使用传统嵌入式模式开发物联网应用的复杂性,以实现将千差万别的设备使用标准的方式进行连接和访问,能将各种设备按统一的接口和协议进行访问,并构建分布式物联网架构,最终实现物联网与云平台的融合,通过云平台任何终端均可访问物联网的所有设备;研究使用基于Node.js[1]的Zetta[2]框架将所有设备发布为统一的REST API接口,通过Zetta提供的Link机制并使用协议WebSocket实现与云平台上Zetta服务器的实时数据通讯,保持云平台与物联网设备的同步;实现了全新的物联网应用开发模式和架构,构建了一个高效实时同步、开发快捷、维护简便的分布式物联网应用;使用统一的模型化方法和高效Node.js平台实现快速开发基于云平台的物联网应用,克服了传统开发使用C语言开发物联网的弊病。     

独立于SOAP协议的Web服务调用

尽管SOAP是众多访问 Web 服务的可能的绑定之一，使用 Web 服务的应用程序通常通过绑到 SOAP 的特定实现的 API 来完成工作。该文将描述一个更通用的、独立于 SOAP 的调用 Web 服务的方法，称之为“Web 服务调用框架”(WSIF)，隐藏了底层访问协议(比如 SOAP)的复杂性。     

移动电子政务平台中安全Web服务的研究

在移动电子政务平台中,使用Webservice是常见的部署方案,web服务是自包含、自描述、模块化的应用,可以通过Web调用它部署的服务,但要求慎重考虑安全性,Web服务使用SOAP协议进行消息传送,SOAP以XML格式在信道中传输,存在信息泄露的风险,传送敏感数据时一定要加密。为解决安全性问题提出一种基于．NET平台的解决方案,使用Web服务时,通过授权的用户经过身份验证可以访问网络信息,客户端在登录时,先获取服务端的公钥,再与服务端协商出用于SOAP消息加密用的非对称密钥与对称密钥,并获取加密后的SessionID,利用SOAP头实现身份验证,利用SOAP扩展实现SOAP消息的选择性加密,使移动电子政务安全性得到保障。     

SOAP及其在嵌入式Web服务中的实现

介绍了嵌入式Web服务中简单对象访问协议(SOAP)处理器的设计及实现方法.SOAP是一种基于扩展标记语言的、在分散或分布式环境中实现信息交换的简单协议.分析了SOAP规范,并在此基础之上深入地了解了SOAP消息的处理过程并实现了SOAP处理器.该处理器的实现包括:在已有的LwIP协议栈上实现了简单的HTTP协议作为SOAP消息的传输协议;基于MicroC/OS-Ⅱ操作系统完成SOAP消息的传输与处理两者之间工作的协调.该SOAP处理器具有设计灵活,集成度低,占用资源小等优点,并已成功地应用于远程实验系统.     

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.     

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.     

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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