基于Linux工业实时控制系统驱动研究

基于ARM9嵌入式微处理器的一体化工业控制系统将所有运算,控制,输入输出和显示模块集成起来,提供高效、智能的控制功能.驱动程序作为控制底层硬件的核心代码,在工业控制系统中起到了核心的作用.本文将详细介绍工业控制系统驱动程序的设计和实现.     

基于ARM9的工业以太网控制系统智能节点控制器设计

文章提出了一种基于ARM9处理器S3C2410的工业以太网控制系统智能节点控制器的设计方案.该控制器作为工业以太网控制系统的现场控制级,采用Linux作为嵌入式操作系统.主要用于对现场设备进行监控,能够向上位级发送现场实时数据,并接受上位机发送的控制信息,对现场设备进行控制.     

基于ARM9的嵌入式喷码机控制系统设计与实现

介绍了一种以ARM9+CPLD为微控制核心的嵌入式喷码机控制系统;系统硬件平台利用ARM9微处理器作为主控制器,采用CPLD作为协处理器;对嵌入式Linux在ARM9系统上的移植及驱动程序的设计进行了分析;在嵌入式GUI主流解决方案QtopiaCore4的基础上,设计高效、稳定的图形化软件控制系统;实际应用表明,该系统具有性能稳定,成本低,系统扩展性强等特点,提供了一种可行的嵌入式喷码机系统方案.     

血液凝固分析仪的多步进电动机控制系统设计

设计了一种新型三层构架的多步进电机控制系统,以实现血凝仪内部各个机械装置的多轴运动控制.阐述了系统的3个组成部分,重点对系统的中间主控协调层及下位节点的硬件及软件进行设计.上位采用PC机;中间层采用了基于ARM Cortex-M4内核的Kinetis K60控制器;下位节点采用MC9S12XSI28微控制器为控制核心、SLA7078MR为步进电机驱动主芯片,并结合CAN总线,通过中间层实现上位机和下位节点的通信.经连续运行测试证明,系统运行稳定,具备良好的实时性和可靠性,可为以步进电机控制系统为基础的多轴控制装置的开发提供可靠的解决方案.     

基于ARM9的嵌入式控制系统设计与实现

提出了以工业级ARM9芯片为核心的嵌入式控制系统设计实现方案.分析一般工业控制器需求,给出了控制系统总体方案,详细设计了A/D、D/A、CAN、USB和网络等硬件电路及模块化软件.通过编译与移植U-Boot、嵌入式Linux内核,能正确引导操作系统并加载根文件系统,为嵌入式控制系统的开发与应用奠定了可靠的软硬件平台.该系统为工业数据采集及控制等领域控制系统设计提供了一种可行的方案.     

基于嵌入式的智能家居远程控制系统设计

伴随着时代的发展,现代化物联网技术越来越得到人们关注,人工智能技术发展成为核心,智能家居是一种结合Zigbee无线技术与各种传感器开发的一套智能家居控制系统,基于ARM的嵌入式智能家居控制系统.系统选择能够满足控制要求的高性能处理器ARM920T作为核心,这个系统满足人们对智能家居的需求.     

基于ARM9的轴角测量系统设计

介绍了轴角测量系统的原理,设计采用了高速32位ARM9微处理器S3C2440A为核心,以自整角机作为传感元件,通过ARM9自带的A/D转换器,实现了轴角信息的采集和模数转换;软件平台采用Windows CE嵌入式操作系统,利用EVC完成了应用程序的开发,并给出了软件流程图;在分析其误差来源的基础上可知,测量误差可控制在±1mil,系统精度完全满足设计需求;该设计体积小巧、接口灵活,可扩展性强.     

基于ARM9的轴角测量系统设计

为了准确获得轴角的信息量,设计了以高速32位ARM9微处理器S3C2440A为核心的轴角测量系统;系统以自整角机作为传感元件,通过ARM9自带的A/D转换器,实现了轴角信息的采集和模数转换;软件平台采用Windows CE嵌入式操作系统,利用EVC完成了应用程序的开发,并给出了软件流程图;在分析其误差来源的基础上可知,测量误差可控制在±1mil,系统精度完全满足设计需求;该设计体积小巧、接口灵活且可扩展性强.     

Linux下基于ARM的工业控制终端与PLC通信技术的研究与应用

结合自动切纸机的嵌入式工业控制终端的开发,分析了Linux下以ARM9为处理器的工业控制终端与三菱F×系列PLC通信的过程.详细介绍了ARM与PLC之间的通信协议、通信命令、通信机制,可以实现ARM与PLC之间实时数据交换和控制功能.     

ZigBee无线传感器网络的振动数据采集系统设计

以ARM9工业控制主板为核心单元,使用CLA-3全向振动传感器,结合ZigBee无线网络技术,设计了一套基于无线传感器网络的振动数据采集系统.     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.