基于ARM的智能CAN总线模块设计

在工业控制环境下,计算机中经常需要提供CAN总线接口,基于CPCI总线的智能CAN模块用于扩展(ComapctPCI计算机系统的CAN总线接口;该模块通过CPCI总线与主机通讯,通过CAN总线与外界接口,在硬件设计上采用ARM控制器和双口RAM,在软件设计上采用环行缓冲设计,提高了模块数据传输的稳定性,大大降低传输过程中数据丢失的几率;在模块设计完成后,在相同的软硬件环境下对该模块和非智能的CAN总线模块进行对比测试,非智能CAN模块的总线传输速率波动是智能模块的一倍;该模块已经在产品应用,性能稳定且效果良好.     

用于智能断路器的CAN总线接口设计与实现

针对目前智能断路器远程监控的发展趋势,在结合上位监控计算机实现网络控制的基础上,设计了一种基于CAN总线的智能断路器通信接口的设计方案,并对CAN接口与智能断路器的传输冲突进行了分析;详细设计了基于自定义应用层协议、以内嵌CAN控制器的MC9508DZ32为核心的CAN总线接口的软硬件设计与实现,形成一个完整的一主多从通信方案;实际运行结果表明,该通信方案为实现智能断路器的远程监控提供了一个解决方案,稳定性好,成本较低,具有广阔的应用前景.     

基于FPGA的智能PMC通讯模块设计

为了灵活在工业控制计算机内实现通讯接口的扩展,提出了一种基于FPGA的智能PMC通讯模块的设计方法,该方法包括了通讯接口模块的主要设计思路与实现过程;通讯接口模块以FPGA为核心,在FPGA内部实现了软核处理器、PCI总线接口、CAN协议控制器、串行协议控制器、寄存器组等功能,使电路的设计高度集成化,也提高了整个设计的可靠性,同时通过处理器软核实现通讯的智能控制,使模块具备稳定的数据传输速率;模块设计完成后,在实验室环境下对串口和两路CAN总线接口进行连续运行测试,在测试过程中模块性能稳定,无误码和丢帧现象。     

车身电子测试系统设计

为了模拟车身电子模块测试所需的真实状态,利用工控机和相关数据采集卡以及CAN总线智能接口,构建了一个集中式的车身电子试验台。系统输出用于测试车身电子模块的各种信号和参数,包括开关量、电压、电阻、脉冲及CAN等信号,驱动车身电子模块检测其性能。利用VC++6.0开发车身电子测试系统,重点说明了数据的滤波方法、数据输入输出通信和数据管理的内容,实现了电子模块检测的有效性和准确性。     

基于CAN通讯卡的智能分布系统设计

本文介绍了一种基于CAN通讯卡的智能分布系统，主要阐述了系统的总体设计方案，重点是系统中以单片机为核心的CAN通讯卡的软硬件设计，现场中各RSM智能模块利用CAN通讯卡将采集的数据上传到上位机再存储到数据库中同时上位机也通过CAN通讯卡对各个RSM智能模块进行初始化设置。     

基于ARM的抗恶劣环境移动终端设计

为了满足抗恶劣环境领域对小型化计算机产品的使用需求,提出一种基于ARM的抗恶劣环境移动终端设计方法。该移动终端在硬件设计上以ARM9系列CPU为核心,通过在嵌入式模块内实现数据处理及存储功能,集成串口、LCD、VGA、CAN等接口和GPS功能,大大提高了移动终端的使用范围和可扩展性;在结构设计上采用新材料、新工艺降低移动终端的体积和重量,同时保证移动终端的温度适应性、抗振动冲击性能和电磁兼容性能。该方法已经投入应用,效果良好。     

基于USB的CAN总线通信模块设计

针对CAN总线和PC机之间通信的"瓶颈"问题,设计了一种通信转换模块,采用单片机PIC18F4550以及CAN总线控制器MCP2510和高速CAN收发器82C250来实现,介绍了各模块之间的硬件接口电路。在此基础上,设计了软件流程以及上位机程序。测试结果表明,设计的USB-CAN通信模块,工作可靠稳定,与PC机连接方便,可用于对CAN网络的实时监控和数据分析。     

CAN总线应用匹配设计

控制器局域网（CAN）总线是一种应用广泛的串行现场总线,它支持多主系统,具有较强的抗干扰能力和实时性。介绍了CAN总线应用的通用网络拓扑结构一总线型拓扑结构,提出了应用中要进行匹配设计的方法,即总线终端电阻匹配,分支节点个数、电阻与总线长度匹配,位速率、总线长度与电缆特性匹配,支线长度与布线间距匹配,总线收发器选择和软件匹配等、设计方法,达到提高CAN总线传输效率、提高抗干扰性的目的。     

DSP 56F8300的FlexCAN通信接口设计

飞思卡尔公司DSP 56F8300的FlexCAN通信模块支持CAN2.0B协议,邮箱多达16个,可独立配置每个邮箱,并内嵌了256字节的RAM空间.本文介绍基于FlexCAN通信模块设计的一套软硬件方案,并给出接口电路原理、软件流程及汇编源代码并调试通过.     

基于LPC2148和MCP2510的高速USB-CAN卡

本文介绍了基于LPC2148和MCP2510的USB-CAN接口卡。LPC2148是基于ARM7TDMI-S核的微控制器,处理器速度高,内置USB2.0全速控制器和SPI接口。MCP2510是独立的CAN控制器,支持V2.0A/B技术规范,通过SPI接口与微控制器进行通讯。接口卡能够实现计算机与CAN总线网络之间的高速数据交换。主要介绍接口卡的硬件电路设计及其详细编程。     

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。