基于LAN91C111的嵌入式高速网络设计

网络在工业控制领域的应用日益广泛,嵌入式以太网具有良好的应用前景.提出了一种性价比较高的嵌入式高速网络设计方案,采用高速DSP和高性能网络接口控制芯片完成基于LAN91C111网络芯片的嵌入式网络系统的开发.详细分析了嵌入式系统中TCP/IP协议栈的各协议的选取,并给出了网络接口控制芯片的处理流程.     

基于DSP的嵌入式CAN／Ethernet网关设计

为了实现现场设备与以太网之间的数据通信,使信息交换深入到工业现场,做到底层设备与以太网的无缝连接,提出基于DSP的CAN总线与以太网互联的方案.介绍了DSP与以太网接口方法和CAN/Ethemet间的协议转换方法,采用嵌入式网络接口设备在网络环境下的自识别、自描述和互操作性技术,实现网络传感器动态配置和重构功能.测试结果表明,嵌入式CAN/Ethemet网关满足自动化设备维护系统的实时性和可靠性要求.     

基于F28M36的EtherNet/IP从站设计

分析了一种全新的工业以太网协议EtherNet/IP,并从源代码的角度阐明了其基本原理。基于TI的DSP+ARM双核芯片F28M36设计了一款采用以太网传输的伺服控制系统控制卡,移植了UCOSII操作系统、CIP协议、嵌入式TCP/IP协议和网络芯片驱动,最终实现了工业以太网协议EtherNet/IP协议的成功移植。     

一种基于PIC单片机的嵌入式以太网接入系统

本文构建的系统是以PIC16F877单片机作为嵌入式系统的中央处理单元,并通过硬件集成电路S-7600A协议栈芯片来实现TCP/IP协议栈.因为以太网已经成为一种广泛的接入Internet的方式,可以通过RTL8019A以太网控制芯片把该系统接入以太网,然后通过以太网接入Internet,从而可实现对此嵌入式系统的远程访问和控制.     

基于嵌入式DSP以太网接口的设计与实现

本文以数字信号处理器和网络控制器为核心,设计了嵌入式DSP系统接入以太网硬件平台,并简化网络层次体系结构.完成相应的网络应用软件的设计,实现了嵌入式系统通过以太网与计算机进行通信功能.     

嵌入式DSP系统Internet技术的实现

提出了一种在嵌入式数字信号处理器系统中实现以太网通讯的解决方案.将TI公司的数字信号处理器TMS320F2812与以太网接口芯片DM9000A相结合,在2812 DSP芯片上移植了μC/OS-II操作系统和LwIP轻型以太网协议栈,并用软件方式实现了TCP/IP网络协议,从而达到嵌入式系统同Internet通信的目的并已得到应用.系统结构简单、性价比高,具有广泛的应用前景.     

基于DSP的以太网通信接口设计

介绍了以DSP为核心,具有以太网接口的嵌入式系统硬件电路组成和软件设计方法。详细地介绍了网络控制器RTLS019A的工作原理及DSP硬件电路设计。解析了嵌入式TCP／IP协议在DSP硬件上的移植,在此协议栈的基础上,完成了上层协议的编写和实现。     

嵌入式Ethernet通信终端的设计

本论文主要介绍TCP/IP协议簇的相关核,心协议及以Ethernet协议为代表的802.3协议在嵌入式DSP终端的实现.论文在网络通信协议深入分析基础上,对协议进行合理精简,详细论述了简化后协议在嵌入式DSP通信终端的具体实现方法,并设计和提出嵌入式DSP以太网终端系统软/硬件方案--"Ethernet Over DSP"方案,给出该方案的具体硬件原理和软件实现机理.     

基于嵌入式控制器的远程监控系统的开发

随着信息与网络技术的发展,嵌入式系统渗透到各个领域,得到了广泛的应用.嵌入式远程监控系统是工业以太网的重要应用领域.本文提出了以DSP芯片为依托,以TCP/IP为通信协议,实现仪器仪表、传感器等进入Intemet,从而实现远程监控为目的的设计方案.作者详细阐明了嵌入式控制器的硬件和软件的设计和实现过程,包括微处理器系统硬件设计、与智能仪表的接口模块实现、TCP/IP协议分析等.     

基于ZigBee的无线传感网络网关的设计

文章介绍了一种基于ZigBee协议的无线传感器网络的网关设计整体方案.以Intel PXA270为核心处理器,处理器通过以太网接入芯片、GPRS模块、符合IEEE802.15.4协议的CC2430射频芯片,分别接入以太网、GPRS网络和无线传感器网络.移植精简的嵌入式TCP/IP协议,分析Z-Stack协议栈,实现两种...     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.