玻璃窑炉的分程解耦控制系统

在玻璃窑炉的控制系统中，窑炉温度的稳定最为重要。由于窑炉温度和油压之间存在强耦合，严重影响传统控制的品质。在当前窑炉温度控制技术的基础上。运用微机进行控制，提出了一种针对玻璃窑炉工艺和调节阀特点的分程解耦控制方法，硬件采用RS485总线标准建立工业控制网络系统，具有良好的抗干扰性。监控软件用GE-NEE3.0实现，做到了人机界面友好、操作方便。现场运行结果表明，该系统具有很大的推厂价值。     

承接玻璃窑炉自控系统设计提供玻璃窑炉微机控制系统

承接玻璃窑炉自控系统设计提供玻璃窑炉微机控制系统天津市工业自动化仪表研究所是从事工业过程控制的专业研究所，拥有职工２７０余人，其中技术人员２１０人，高级职称７０余人，中级职称１００余人，技术力量雄厚，是天津市自动化学会挂靠单位，主办《自动化与仪表》杂...     

基于预测控制的玻璃窑炉温度系统的控制研究

玻璃窑炉温度系统是一个大惯性、大滞后并具有非线性特征的变参数系统,难以建立精确的数学模型,而且窑炉在运行过程中受到多种扰动因素的影响,传统的PID控制难以满足对窑炉温度控制的高性能要求。本文将引入预测控制中的一种典型控制算法-动态矩阵控制（DMC）算法,提出把此算法应用到玻璃窑炉温度系统中.针对窑炉温度系统的特性进行了参数的设计研究,最后对窑炉温度系统进行了仿真。结果表明该算法具有响应速度快﹑跟踪性能好﹑鲁棒性和抗干扰性强的优点,非常适合于工业上大滞后控制系统。     

一种实用计算机控制的车辆导航系统

本文介绍了嵌入式ＰＣ机ＰＣ／１０４系统的特点及车辆导航的基本原理。给出了系统组成框图和软件框图，给出了跑车试验结果，说明系统运行良好     

无氧铜杆上引法微机控制系统

本文介绍一个应用于电缆行业无氧铜杆上引法微机控制系统，给出了系统框图，软件框图．简介了设计原理。该系统经过一年多的工业运行，证明实用可靠，推广前景很好。     

玻璃窑炉微机控制系统

玻璃窑炉是玻璃生产中重要的设备之一,对玻璃窑炉管理方法的优劣,直接影响炉体寿命以及产品质量。特别是从节约能源的角度来看,控制好窑炉内各种参数,使这些参数相对稳定是非常必要的。随着现代科学技术的发展和计算机技术的广泛应用,为准确、及时地检测和处理窑炉内的各种参数提供了有效的手段。根据玻璃行业的要求,我们在多年来进行玻璃窑炉仪表控制系统及计算机控制系统的研究和实践的基础上,开发了玻璃窑炉微机控制系统,得到了用户的好评。现将该系统作以介绍。     

工业窑炉分布式控制系统的设计

针对目前窑炉行业运行控制中普遍存在能源浪费、低效、精度差、周期长等缺点,提出了开发工业窑炉分布式控制系统;此系统建立统一窑炉控制模型,将窑炉控制整体上分割成为若干个自治系统实现对每个温区的分别单独控制;自治系统内部运行中通过严谨而又科学的数学计算与软件PID技术,实现对每一温区高效、精确的控制;系统同时具有丰富的人机对话、安全防爆警示等功能。工程实践表明,此系统为工业窑炉控制行业提供了良好的模型和方法,具有很大的实际应用价值。     

微型计算机在NPT5空压机试验中的应用

本文介绍了以ＩＢＭ－ＰＣ微机为上位机、ＰＬＣ（可编程序控制器）及微电脑数字化仪器为下位机所组成的ＮＰＴ５空压机产品试验微机自动测控系统，给出了系统硬件框图、软件框图及系统的主要性能特点，同时说明了该系统所具有的技术经济价值。     

新型玻璃工业窑炉微机控制系统与数值仿真研究

玻璃工业窑炉是玻璃工业生产中很重要的设备,而其控制技术极大的影响着玻璃产品的质量,燃料消耗,成本等。本文基于目前窑炉控制技术的基础上,以马蹄型热式燃油窑炉为原型,采用微机进行控制,并可以进行手动／自动的无扰动切换,温度,压力等参数的越限报警。最后运用热工方法对温度场进行分析计算,与控制结果比较以便做出改进。该系统有一定的推广价值。     

地铁移频信号检测系统的设计

分析了移频信号的频谱特点，利用DSP器件，设计了一种FSK地铁信号的检测系统，并给出系统的构成框图和软件流程图，最后进行仿真分析。     

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。