基于网络的油田地理信息系统的设计与开发

地理信息系统（GIS）是一种用于储存、管理和分析空间信息的强有力的工具。根据油田地理信息管理的特点,基于网络的油田地理信息系统的设计与开发具有重要意义。研究了GIS技术在油田地理信息系统中的应用,讨论了系统的网络结构及开发技术,着重介绍了GIS在设计和应用过程中的几个关键问题。     

AGIS技术在油田地面工程规划中的应用

基于GIS技术建立的"大庆油田地面建设信息系统"可以实现对大庆油田地面工程的科学规划,并能产生巨大的经济效益.该系统包括原油集输系统等13个专业子系统,具有辅助规划等6项功能.该系统设计6个功能模块.本文给出了该系统的总体设计与功能设计,以及系统的实施流程,而且以一个油田区块为例,介绍了该系统在油田地面工程规划中的应用情况.     

GIS技术在油田地面工程规划中的应用

基于GIS技术建立的“大庆油田地面建设信息系统”可以实现对大庆油田地面工程的科学规划，并能产生巨大的经济效益。该系统包括原油集输系统等13个专业子系统．具有辅助规划等6项功能。该系统设计6个功能模块。本文给出了该系统的总体设计与功能设计，以及系统的实施流程，而且以一个油田区块为例，介绍了该系统在油田地面工程规划中的应用情况。     

基于GIS技术的电网拓扑分析与应用

本文在介绍GIS技术在电力系统中的应用的基础上,提出了基于GIS技术的电网拓扑的的数学描述,设计了GIS平台中电网拓扑自动生成和存储的方法,最后介绍了拓扑分析与搜索技术在电力自动化中的应用方法.     

GIS中基于浮动坐标系动态迭代技术的高斯投影反变换技术

首先对GIS中高斯投影正反变换技术进行了概述；然后就经典高斯反变换公式以及即存GIS中高斯反变换存在的问题，针对GIS在“数字地球”中的应用提出一种基于“浮动坐标系动态迭代技术”的解决方案，并给出高斯反变换的实现过程和具体算法，结合水土流失GIS的具体应用实践给出结论。     

GIS在电网规划中的应用研究综述

电网规划是电力系统建设必不可少的前期工作,科学合理的电网规划是电力系统安全稳定运行的保证。地理信息系统强大的数据管理和空间分析能力为电网规划提供空间决策支持,有效提高了电网规划工作的科学性与准确性。文中针对目前GIS分析技术在电网规划工作中的应用与优势,主要从空间负荷预测、变电站的选址定容及输电线路的路径选择与优化三个方面综述GIS技术在电网规划中的应用。最后展望GIS在电网规划中的未来研究方向。     

GIS的空间数据集成及其在NSDI中的应用

空间数据集成建库是GIS的基础和关键技术，GIS是国家空间数据基础设施（NSDI）的核心和重要组成部分。这里给出了GIS的概念及其数据库集成建库过程、NSDI的构成以及GIS在NSDI中的应用。     

基于ArcSDE/SVG的分布式WebGIS模型*

根据油田对WebGIS的应用需求,对油田空间对象及其属性数据以及对象间的关系进行分析的基础上,结合当前流行的ArcSDE空间模型中的数据组织技术,构建了一个能够将全域空间模型与分布于异地的空间模型实现统一的分布式WebGIS模型。通过这一模型实现对各种复杂空间对象GIS信息的存储,并采用ArcSDE技术实现了客户端与GIS服务器端的数据通信,客户端采用SVG技术实现图层管理和分布在不同区域地图的展示。基于这一体系模型,结合油田的实际需求,采用元数据驱动技术构建了油田WebGIS平台的元模型,最后对其进行了     

基于ArcObjects开发的多编辑源分布式地图同步方法研究

针对分布式GIS应用系统中存在的多编辑源数据同步问题,在结合文件系统和地理数据库数据管理模型的基础上,探讨了利用ArcObjects组件独立开发GIS应用系统,解决多编辑源分布式GIS地图同步问题.对ArcObjects组件、ArcSDE以及相关技术进行阐述,详细说明了多编辑源地图同步问题的解决方法,最后给出该方法在某灌区分布式GIS应用系统中的应用实例.     

基于Mobile SVG的油田移动GIS服务

随着移动技术尤其是3G与移动IP技术的发展,手机的计算功能日益强大,为解决因油田作业流动性强、地处偏远而无法实时掌控油田GIS信息的实际困难提供了新思路.本文基于对J2ME平台、Mobile SVG、移动数据传输等技术的深入研究,结合油田实际情况,提出了油田移动GIS服务的设计框架,给出了关键技术的解决方案,为"数字油田"的建设奠定了技术基础.     

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