医用手术灯微机控制系统的设计

系统选用了89LPC932单片微机及相关集成电路芯片组成控制系统,对医用手术灯进行应急切换、故障报警、亮度记忆和亮度调节等功能。当手术过程中手术灯发生故障时,可自动切换,接通备用手术灯,确保手术正常照明,并报警指示故障。控制系统还具有记忆手术灯亮度的功能,每次开启手术灯时能保持上次手术灯关闭时的亮度。手术灯的亮度可分八级进行控制,亮度的等级由发光二极管显示。     

LSQ型超声波明渠微机流量计

ＬＳＱ型超声波明渠微机流量计浙江余姚流量仪表厂新生产的ＬＳＱ型超声波明渠微机流量计采用水力测流、超声波测位、微电脑处理、数字显示和打印记录等技术，能在较恶劣环境下安装、自动计量。具有自动跟踪补偿、自动交直流切换、交流断电续测流量和失电记忆等功能。具有...     

微机液压试验系统中的检测电路

一、微机检测与控制系统近年来,微机在测试实践中的得到广泛应用,它改变了过去利用常规测量仪表对试验对象进行人工判读和记录的测试状况,将测试技术提高到了一个新的水平。图1是某液压泵寿命试验的微机检测与控制系统,具有多个检测和控制对象,可以进行试验数据的自动采集、实时显示和自动数据处理。对试验全过程自动操作、控制、检测、监控和自动停车。试验设备启动后可以无人监视。     

F78-Ⅳ型医用X射线摄影装置控制台简介

F78-Ⅳ型医用X射线摄影装置用控制台采用了当今流行的薄膜面板、微机控制、轻触式按键、数字式显示设计,具有kV、mA、mAs、s显示及自身诊断功能;可依据病人的体态及部位选择使用;限时器及各种保护功能均由微机控制实现,共备有192种组态(即一旦选定投照部位,则相应的摄影参数就会自动给定并显示在面板上),运用这种医用X射线摄影装     

微机与仪表控制系统的无扰切换

在以微型机控制系统和常规仪表调节系统共存情况下,如何解决无扰自动切换?本文对自动切换原理和工作过程作了较为详细的介绍。图2     

SJZ5000型配合饲料加工成套设备的微机控制系统

成套设备中的微机控制系统由紫金Ⅱ和一个 TP801工业控制箱组成,为主——从式结构。该系统的特点是:具有汉字人——机对话;能手/自动切换;进行多种饲料配方的选择和计算;电子秤标定校准;掉电时断点状态保护;自动完成配料、混合、显示、制表打印、报警;修改配方和混合时间常数;生产流程的模拟屏直观显示;配料精度0.1%[注]。     

DCS系统的安全可靠运行

DCS系统,即分散式控制系统,是相对于集中式控制系统而言的一种新型计算机控制系统,它是在集中式控制系统的基础上发展、演变而来的。DCS系统利用计算机技术、控制技术、通信技术、图形显示技术实现过程控制和过程管理,它以多台微机分散应用于过程控制系统中,通过通信总线、显示器、键盘等设备高度集中地进行操作、显示和报警。     

触摸屏与PLC在海水淡化控制系统中的应用

从海水淡化反渗透深度处理工艺出发,开发并设计了双组膜组件同时或交替运行的海水淡化系统,实现了长时间连续供水。该控制系统具有自动、手动两种运行模式,采用触摸屏作为人机界面,用以实现参数设定、修改、显示等功能,能够更方便、更直观地了解海水淡化系统的工作阶段,并能方便地判断出系统的异常所在。利用PLC实现海水淡化处理过程的电磁阀及水泵电机等设备的控制,并在系统出现异常时自动切换状态或停机。系统稳定性好、可靠性高、维护简便。     

GW-Ⅱ型工业锅炉微机自动控制系统

介绍由STD-PC组成的工业煤粉锅炉微机自动控制系统,详述了该系统的硬件配置、软件编程、主要功能、控制方法等.实践证明该系统工作可靠,操作简单,节能显著,采用全套国产仪表配套,是我国工业锅炉值得推广的自动控制系统,具有良好的经济效益和深远的社会效益.     

模糊控制在单元机组锅炉给水阀门自动切换控制中的应用

某电厂300 MW单元机组控制系统采用西门子TELEPERMME DCS集散控制系统,在对其锅炉给水系统阀门切换的改造过程中,利用模糊控制理论,根据实际运行状况及运行资料,通过大量的实验分析,设计出切实可行的给水阀门切换逻辑,使燃煤锅炉给水系统给水阀门实现自动切换,解决了大容量单元机组燃煤锅炉实现全程给水自动控制所必须解决的一个关键问题。本系统的投运不仅节约了改造、更换给水系统所需的大量资金,由于机组实现自动启动,大大缩短了启动时间,使机组启动过程中消耗的燃料量明显下降,经济效益十分显著;同时也给出了模糊控制技术在控制工程中实际应用的一种思路。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

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.     

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.     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。