CAN与RS232转换节点的设计与实现

介绍将CAN总线接口与RS232总线接口相互转换的设计方法和2种总线电平转换关系,实现CAN总线与各模块的接口设计,制定了相应的软硬件设计方案,并给出软件设计流程图以及部分硬件设计原理图。为CAN总线与RS232总线互联提供了一种方法,对CAN总线与RS232总线接口设备的互联和广泛应用的实现具有重要意义。     

RS-232与CAN接口卡的设计

与传统的RS-232总线相比,CAN总线是一个高速、长距离、多主、经济的网络系统,特别适用于实时系统。其易用性和低成本使得CAN在汽车工业和自动化领域得到广泛的应用。因此设计高性能的RS-232与CAN总线的接口卡以代替传统的PC机的RS-232总线通信具有重要意义。本主要介绍了CAN总线的工作原理和RS-232与CAN接口卡的软硬件设计过程及注意事项。     

基于ARM9的USB与多通道CAN转换器的设计

介绍了基于嵌入式系统的USB与多通道CAN转换器的设计。将USB总线与CAN总线的特点相结合,使上位机能够通过USB接口同时监视多个CAN通道(最多8个),完成USB总线与CAN总线的数据双向传输。     

列车总线控制系统的CAN—485总线网关设计

介绍了列车总线控制系统中的CAN总线与485总线之间的互联网关,CAN总线控制器INTEL82526的基本工作原理和功能,给出了CAN—485总线网关的软、硬件具体实现方案。     

CAN总线实验网络装置设计及实现

针对CAN总线在教学实验的需要,设计并实现了基于CAN总线的实验平台,完成了CAN总线与EPP并口通信的接口设计,分析解决了采用EPP协议CAN总线监控节点设计的主要问题.     

CAN总线与组态软件的连接工具

设计的CAN总线连接工具可兼容多种自定义的CAN应用协议,提供了组态软件应用程序与CAN总线系统通信的接口,可以方便地通过调用自主开发CAN卡的DLL连接CAN总线应用系统,通过DDE连接组态软件应用程序,具有通用性.介绍了该连接工具的实现原理和实现方法,并利用该工具建立一个"组态王"与CAN总线系统的应用工程.     

CAN总线技术在星载控制计算机中的应用研究

CAN总线在民用工业领域已经广泛应用，在航天领域也遂渐成为星上总线之一。本文结合CAN总线在国内外航天卫星领域中的实践应用．描述了CAN总线的特点和CAN总线的工作原理。从协议上分析了CAN总线航天应用的可行性，从芯片选用、原理设计、接口实现等方面阐述了CAN总线在我国航天领域的应用。     

基于ARM技术的CAN总线和以太网间的互联设计

提出一种CAN总线与以太网互联的系统设计方案,实现了CAN总线与以太网的数据互联。     

CAN总线在混和动力汽车电机控制系统中的应用

CAN总线的主要功能与特点、CAN控制器以及CAN总线在混和动力汽车电机控制系统中的应用;CAN总线与电机控制芯片TMS320F241的接口设计、帧结构以及通信中断服务程序流程图等。     

基于MCP2510的CAN总线应用及故障判定

对CAN总线进行了简要介绍,阐述了CAN总线控制器在设计使用过程中的注意事项、PIC16F876A处理器与MCP2510的连接管理和利用CAN控制器的不同工作模式进行初始化、自动通信检验,同时设计了RS232转CAN总线的电路,并给出了电路图,列举了MCP2510 CAN总线控制器、82C250总线收发器的在线故障判断和检修策略。     

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.