基于CAN总线的交流伺服电机控制技术

介绍一种基于CAN总线的交流伺服电机控制的设计。由CAN总线联系整个系统，PC通过CAN总线可在单片机控制的交流伺服系统之间，单片机与PC机之间进行通讯，构成的高可靠系统能实现对多台单片机控制的伺服电机的监控、通信。     

基于CAN总线的电力直流电源监控系统的设计

介绍了一种基于CAN总线的电力直流电源监控系统的设计及其工作原理。该设计基于S3C44B0X的嵌入式系统组成系统的中央监控模块,并通过CAN总线与由单片机系统组成的各直流电源的现场控制节点通信,以达到对各直流电源的集中监控,从而实现整个电力系统管理的自动化。     

专家智能电除尘器监控系统设计

针对目前国内火力发电厂电除尘器运行维护管理不佳的现状,运用CAN总线技术和专家系统相关理论设计了一种新型的智能电除尘监控系统.控制器单片机程序使用Keil C语言开发,上位机监控功能使用VB 6.0语言实现.研究了CAN总线的总体结构,对高压电源工作点的判断、低压振打控制、故障诊断、时序做了较详细的分析,并简要介绍了该监控系统的主要功能.     

基于CAN总线的远程H_2监控系统

根据工业现场对H2监控的需求,开发了一种基于CAN总线的远程H2监控系统。该系统使用内嵌CAN模块的单片机搭建CAN通信网络,实现H2的远程监控。网络节点分为智能监控节点和显示节点,各个节点之间独立工作。实践表明:该系统成本低,精度高,抗干扰能力强,可实现在线监控,具有良好的工程应用前景。     

基于CAN总线的新型车辆配电网络管理系统

基于CAN总线的车辆配电网络管理系统,采用单片机、若干智能节点和一个显示终端构建.使用一种16位单片机控制各个智能节点.每个智能节点均由带CAN控制器的保险丝单元构成.单片机和智能节点之间通过CAN总线进行数据交换.用电支路的状态信息反馈到显示终端,实现对所有用电负载的远程监控.     

基于CAN总线的智能双向胎压监测系统设计

利用无线集成传感器SP30和汽车用CAN总线实现胎压监测系统,该系统实现轮胎压力和温度的实时监控,轮胎位置的自动识别,与汽车CAN总线上其它节点的数据交换,监控模块与无线传感模块的双向数据通信控制。本文阐述监测系统总体方案,软件、硬件设计。通过实验室台架试验,该系统能准确监控轮胎的压力和温度,并能利用CAN总线实现数据正确交换。     

基于CAN总线的粮库温湿度监控系统的研制

介绍了一种基于单片机 AT89C5 2的 CAN总线式测控系统 ,主要阐述了粮库温湿度监控系统的总体设计方案 ,以及该监控系统的软硬件设计 ,实现了对粮库温湿度的高精度监控。     

基于CAN总线和以太网的煤矿井下变电所远程监控系统

为了提高煤矿井下变电所检测数据和控制数据的可靠性和实时性,提出了一种基于CAN总线和以太网的煤矿井下变电所远程监控系统的设计方案。该系统采用高压开关综合保护器将煤矿井下变电所各种保护检测信号转换成CAN总线数据,每个变电所设置1个或多个监控分站;监控分站采用基于PIC18F4680单片机和ENC28J60以太网控制器开发的CAN总线-以太网协议转换器将CAN总线数据转换成以太网数据帧,并通过以太网传输;地面监控中心的上位机采用多线程技术将以太网数据帧转换为Modbus协议数据,实现对井下变电所的远程监测与控制功能。实际应用表明,采用CAN总线和以太网的网络结构可以较好地满足煤矿井下变电所远程监控系统的要求。     

基于CAN总线的火灾远程监控系统

根据远程火灾信息数据采集和传输的特点,提出了一种基于CAN总线和嵌入式网关的火灾远程监控系统的总体框架设计方案.该方案使用CAN总线实现火灾远程监控系统数据采集终端的联网和通讯,并且通过嵌入式网关实现CAN总线到以太局域网或Internet的连接,最后,对接入Internet的火灾远程监控信息传输的实时性、可靠性和安全性进行了需求分析.     

车载CAN总线计算机监控系统的设计与应用

利用通用CAN总线通讯适配卡,设计开发了一套基于VB6.0的车载CAN总线计算机监控系统,并使用该系统对大众PASSAT车身舒适系统CAN总线上传输的数据帧进行测试与分析,实现了对PASSAT车身舒适系统CAN总线节点的远程控制,验证了低成本车载CAN总线监控系统设计、应用的可行性与车载CAN总线网络系统控制功能扩充的灵活性.     

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。