光线感应静电防尘窗帘的设计

为了解决生活中光强不可控以及灰尘干扰问题,设计了一款既具有自动控制功能又可以防尘除尘的窗帘。光线感应静电防尘窗帘以单片机为基础,运用光敏电阻的自动感应功能,根据阳光不同时刻的照射角度和光线强度,通过步进电机对窗帘开启进行控制。并且静电除尘器是利用高压静电吸附带电离子的原理进行除尘。     

InTouch在静电除尘自动控制系统中的应用

针对现今各类除尘器除尘效率低的现实,依据静电除尘的基本原理,提出了应用InTouch软件设计静电除尘自动控制系统的方法,既运用InTouch设计监控主机,去控制、监控现场的PLC控制单元,本文详细介绍了系统的设计,InTouch通信的原理及配置,实现了控制、维护、与技术管理的集成.实践表明了该系统的稳定性,具有较强的实用价值.     

矿用湿式除尘器变频调速性能试验研究

针对由于掘进工作面的不断推进导致掘进巷道的压、抽风量比值减小,从而影响湿式除尘器控尘、除尘效果的问题,介绍了通风机变频调速原理,并通过试验的手段得到湿式除尘器风量与频率、风量与功率及除尘效率与频率的关系,为湿式除尘器的风量控制、变频调速区间的确定等提供了依据。     

InTouch在静电除尘自动控制系统中的应用

针对现今各类除尘器除尘效率低的现实,依据静电除尘的基本原理,提出了应用InTouch软件设计静电除尘自动控制系统的方法,既运用InTouch设计监控主机,去控制、监控现场的PLC控制单元,本文详细介绍了系统的设计,In-Touch通信的原理及配置,实现了控制、维护、与技术管理的集成。实践表明了该系统的稳定性,具有较强的实用价值。     

大功率石墨电极厂电捕焦除尘装置及其应用

文章介绍了一种高压静电去除焦油、沥青烟等尘埃的电捕焦装置及其工作原理。该装置以PLC为控制核心、高压恒流电源为电场电源,可自动跟踪电场的变化,提高了除尘效率。检测数据表明,该装置的净化除尘指标均达到了标准要求。     

电除尘电场电路与PLC控制分析与改进

介绍新钢1#、2#高炉槽下GD50-Ⅲ静电除尘的除尘流程及电场电路,对静电除尘器外部设备的PLC控制进行分析,并对存在的问题提出改进方法。     

InTouch组态软件在电袋复合式除尘器中的应用

随着环境问题的日益严重,国家对各行业环保要求的不断提高,电除尘器的除尘效率已逐渐无法满足新的粉尘排放要求,电袋复合式除尘器应运而生,这是一种有机集成静电除尘和过滤除尘两种除尘机理的新型节能高效除尘器.伴随技术的发展,电袋复合式除尘器充分需利用先进的工业控制技术、网络技术、数据库技术以及其它相关的高科技技术,以实现除尘的自动化.而InTouch组态软件应用于电袋复合式除尘器的监控系统,可以高效良好地实现电袋复合式除尘器的自动化控制.     

高压静电除尘用数字式可控硅触发控制器设计

本文针对工业生产中利用高压静电除尘原理，介绍了一种高压静电除尘用全数字可控硅电源控制器的设计方案，给出了系统的硬件组成．并且分析了各模块的功能和系统的软件流程。该控制器运行稳定可靠、控制精度高、操作简单，且成本低。易维护，具有很高的实用与推广价值。     

高频高压静电除尘电源控制系统的设计

介绍一种高频高压静电除尘电源控制系统.改控制系统以TMS320F2812和TL494核心,通过研究先进的控制方法来提高电除尘器的工作效率.     

高频电源在艾萨炉尾气收尘器上的应用

艾萨炉尾气收尘采用高压静电除尘器，并且使用多级收尘的方式，具有能适应高温、收尘效果好、对烟气的适应性较强等特点。本文介绍了高频电源在静电收尘器上的应用和高频电源的工作原理，并简单介绍了其使用效果。     

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。