XML技术在清江梯级调度管理信息系统中的应用研究

文中将XML技术用于解决清江梯级调度管理信息系统中的应用问题，建立了清江梯级调度管理信息系统模型，提出了用XML作为统一的数据模型的Web数据库的概念和体系结构，设计并实现了基于XML的Web数据库上的查询。     

清江梯级调度管理信息系统研究

该文探讨了管理信息系统在梯级调度中的运用，利用可视化技术、数据库技术、基于C／S和B／S的网络技术，实现了梯级水电综合调度决策过程的自动化、智能化。介绍了系统各部分的基本原理和组成，并就管理信息系统今后的发展趋势进行了初步的研究。     

三峡数字梯级调度系统数据库子系统设计研究

基于数据库一般设计步骤并结合三峡梯级调度系统，本文介绍了三峡梯级调度系统数据库的设计，针对梯级调度系统对数据库进行优化，提高了系统的性能。本系统具有很好的移植性。在Windows和Linux运行环境中进行了测试，系统运行效果良好。     

基于网络技术的水电自动化发展趋势的技术研究

计算机技术、信息技术、网络技术的飞速发展,给水电厂自动化系统无论在结构上还是在功能上,都提供了一个广阔的发展舞台。水电厂自动化也必须适应新的形势需要,发展成为一个集计算机、控制、通信、网络、电力电子为一体的综合系统,具备完备的硬件结构,开放的软件平台和强大的应用系统。不仅可以完成对单个电厂,还要进一步实现对梯级、流域、甚至跨流域的水电厂群的经济运行和安全监控。     

XML技术在清江梯级调度管理信息系统的应用研究

文中将XML技术用于解决清江梯级调度管理信息系统中的应用问题,建立了清江梯级调度管理信息系统模型,提出了用XML作为统一的数据模型的Web数据库的概念和体系结构 ,设计并实现了基于XML的Web数据库上的查询.     

油田开发数据库在油藏研究中的初步应用

在提倡数字油田技术的今天，油田开发数据库是最基础的工作。本文就当前开发数据库所采用的技术进行了简要的介绍，并就目前油田开发数据库的应用现状进行了分析。在此基础上，分析了油田开发数据库应用的技术难点，就这些难点提出了油田开发数据库应用的技术设计，并提出了实现的具体解决办法，这些解决办法所使用的技术是该领域首次使用。通过编码设计，实现了油田开发数据库应用的专用软件，应用实例表明，研究方法正确、技术应用先进、矿场使用效果良好。迈出了开发数据库走向应用研究的第一步，对数字油田的设计实现具有指导作用。     

计算机监控软件中实时数据库系统的研制

针对水电厂计算机监控系统中实时数据管理问题,围绕以数据库形式集中、有效管理实时数据,对水电厂实时数据库及其管理系统进行分析设计。系统中采用全关系数据模型、实时数据库建立于内存中并和商用数据库系统相结合而使系统具有灵活支持、快速存取、可扩充性强等特点。     

面向对象数据库系统的研究和开发

面向对象数据库技术和系统是当前数据库研究和开发的热点之一。本文着眼于国产化产品的研究和开发，综述了国际上的最新研究动态及发展趋势，阐述了在我国进行进一步研究和开发的意义，讨论了值得研究的主要内容和关键技术以及可采用的技术路线     

基于PHP和Mysql的在线收费信息咨询系统研究开发

对分布式动态Web数据库应用系统开发的三层结构技术进行探讨。利用PHP、Mysql和Dreamweaver等工具开发一个基于PHP和Mysql的Web数据库应用系统-“在线收费信息咨询系统”，提出了利用电子存折点击式扣钱新的网站收费方式。并在具体实现过程中采用了一些新的技术，诸如重用技术和数据库访问对象封装技术，以及分页、加密等技术。     

InTouch在水电厂计算机监控系统中的应用

针对水电厂工作原理和工艺要求,采用InTouch软件平台开发水电厂后台监控系统,介绍系统的设计、InTouch通信的原理及软件配置。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

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.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

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.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

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.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。