Web GIS开发方法比较研究

本文从ＣＧＩ,Ｓｅｒｖｅｒ ＡＰＩ（ＩＤＣ）、ＡｃｔｉｖｅＸ（ＡＳＰ）、ＪＡＶＡ的工作原理出发,结合Ｗｅｂ ＧＩＳ开发的商用软件,研究它们在开发ＷｅｂＧＩＳ时的优缺点,为Ｗｅｂ ＧＩＳ的开发者提供借鉴意义。     

基于Intranet的图书馆Web检索系统的开发

主要分析了浏览器、Ｗｅｂ服务器与外部应用程序的两种接口方式ＣＧＩ和ＩＳＡＰＩ以及ＩＳＡＰＩ的工作流程。在此基础上介绍了作者开发的本单位Ｉｎｔｒａｎｅｔ网上的图书馆Ｗｅｂ信息检索系统。     

基于Intranet图书馆Web检索系统的开发

主要分析了浏览器,Ｗｅｂ服务器与外部应用程序的两种接口方式ＣＧＩ和ＩＳＡＰＩ以及ＩＳＡＰＩ的工作流程,在此基础上介绍了作者开发的本单位Ｉｎｔｒａｎｅｔ网上的图书馆Ｗｅｂ信息检索系统。     

快捷WebGIS模型

ＷｅｂＧＩＳ是ＧＩＳ技术在Ｉｎｔｅｒｎｅｔ领域的应用。快捷ＷｅｂＧＩＳ模型是一组运用ＡｃｔｉｖｅＸ和ＧＩＳ技术在网络环境下运行的程序。它支持所有通用的地图操作。介绍了快捷ＷｅｂＧＩＳ模型的结构、地图数据库的组织和模型的实现等。     

SGI积极推动和促进“第二代Web的发展”

ＳＧＩ积极推动和促进“第二代Ｗｅｂ的发展”在４月下旬ＳＧＩ的“视算科技，创造未来——ＳＧＩ全线产品及应用研讨会”上，ＳＧＩ提出“第二代ＷＥＢ的概念及应用”这一主题。那么，何为第二代Ｗｅｂ？ＳＧＩ在开发第二代Ｗｅｂ方面作出了哪些贡献？为了让客户对这些概...     

Web-GIS的设计与实现

地理信息系统要想有更大的发展,必须走开放式的道路。Ｗｅｂ－ＧＩＳ软件由于采用了当前主流的通信、应用协议和体系结构,大大增强了ＧＩＳ软件的开放性。该文主要从Ｗｅｂ－ＧＩＳ的特点、设计和实现的角度阐述了在开发Ｗｅｂ－ＧＩＳ中应考虑的各个要素,详细分析了Ｗｅｂ－ＧＩＳ的体系结构及其各种实现技术,并且提出了对今后发展的一些看法。     

基于Internet的地理信息系统（WebGIS）的研究和开发

本文分析了ＧＩＳ的最新发展技术ＷｅｂＧＩＳ技术的概念,并对传统的ＧＩＳ技术和ＷｅｂＧＩＳ进行了比较,通过剖析ＧＩＳ的体系结构模型,探讨了开发ＷｅｂＧＩＳ的关键技术和ＷｅｂＧＩＳ系统的整体开发方案。     

利用IDC开发基于数据库的Web应用

随着Ｉｎｔｅｒｎｅｔ／Ｉｎｔｒａｎｅｔ技术的广泛应用，需要实现Ｗｅｂ服务器与数据库之间的连接。本文介绍如何使用ＭＳ ＩＳＡＰＩ的ＩＤＣ开发基于数据库的Ｗｅｂ应用程序。     

SGI的对称多处理Web服务器系列

ＳＧＩ的对称多处理Ｗｅｂ服务器系列在Ｉｎｔｅｒｎｅｔ上的ＷＷＷ服务正在发生深刻的变化——从静态的，以文本为主的环境转向动态的，高度交互的环境。ＳＧＩ的Ｗｅｂ服务器系列ＷｅｄＦＯＲＣＥＣＨＡＬＬＥＮＧＥＤＭ、Ｌ、ＸＬ，由于采用了先进的ＣＨＡＬＬＥＮＧＥ...     

利用ISAPI开发Web应用

本文比较了ＩＳＡＰＩ与ＣＧＩ访问数据库的特点，并介绍了利用微软的ＩＩＳ提供的ＩＳＡＰＩ接口开发Ｗｅｂ应用的一般方法。     

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