基于PC总线虚拟仪器的关键技术及发展前景

<正> 虚拟仪器是计算机测试仪器发展的结果,一般来说它由微计算机、模块化功能硬件和软件平台组成,用户通过操作计算机图形构成的虚拟仪器面板或在图形化软件平台上采用图形化编程语言编程,即可控制虚拟测试仪器的运行,完成对被测试量的采集、分析、判断、显示、存储及数据生成等.可以说微计算机技术的发展过程,基本上也是计算机仪器的发展过程.在计算机仪器的发展初期,并没有虚拟仪器的概念,人们利用计算机代替人对测试仪器完成某些操作,形成一定的闭环控制系统.在这种情况下,计算机与测试仪器之间有高速的数据通信并不     

基于虚拟仪器应变测量系统的设计和研究

本文主要介绍了基于虚拟仪器的应变测量系统的软硬件设计方法.采用LabVIEW可视化的虚拟仪器系统开发平台,把传统仪器的功能模块集成在一台计算机中,用户可以在最基本的硬件支持下,通过修改虚拟仪器的软件来改变它的功能与规模.该系统实现了应变的自动测量,并通过计算机完成数据的处理、分析和存储以及将数据网络发布,能满足应变测量内容的多样性对应变测量仪器提出的各种不同要求.     

虚拟仪器设计的探讨与实践

介绍了虚拟仪器的概念 ,探讨了虚拟仪器的发展前景 ,使用工业控制计算机并用Delphi5通过对串行口的设置和编程实现数据的采集和处理 ,实现虚拟仪器设计     

虚拟仪器与PC卡泰技术的现状与发展

虚拟仪器(VI)和卡泰(CATAI)-计算机采集测试分析仪器是电子测量和计算机测试控制的前沿技术,虚拟仪器将计算机采集测试分析引入到电子测量领域,用数字化和软件技术极大地提高了测量的灵活性和可扩充性.本文就虚拟仪器的状况和发展趋势作一展望和探讨.     

基于LabVIEW的同步发电机试验系统的研制

随着计算机和软件技术的发展,虚拟仪器正在逐渐成为测试领域的发展方向.采用虚拟仪器实现同步电机试验成为电机试验的发展趋势.本文主要介绍以虚拟仪器软件平台LabVIEW和PCI插槽的数据采集卡以及个人计算机为基础,建立一套适合于电机试验数据采集与分析虚拟仪器系统.     

虚拟仪器设计的探讨与实践

介绍了虚拟仪器的概念,探讨了虚拟仪器的发展前景,使用工业控制计算机并用Delphi5通过对串行口的设置和编程实现数据的采集和处理,实现虚拟仪器设计。     

基于LabVIEW7.0的FIR数字滤波器的设计

虚拟仪器(Virtual Instrument,简称VI)是现代计算机技术、通信技术和测量技术相结合的产物.本文介绍了虚拟仪器的特点,应用以及基于LabVIEW虚拟仪器开发平台设计虚拟数字滤波器的方法.     

探析大气数据计算机实验系统设计中的虚拟仪器技术应用

分析大气数据计算机实验系统设计中应用虚拟仪器技术的相关问题.对于当前大气数据计算机实验系统设计中,运用虚拟仪器技术,并可以模拟大气数据计算机中经传感器采样得到的飞行数据,并可以对数据进行解算,并采用数值、仪表以及指示灯等方式显示出解算结果,确保提升大气数据计算机实验系统的应用效益.结果研究证实,在设计大气数据计算机实验系统中,应用虚拟仪器技术,可以提升实验系统的应用性能,使系统的可拓展性、用户可用性方面均得到增强,同时也能够降低系统设计成本,相较于传统的降低24.0％成本效益,发挥积极的系统设计实现效益.结论表明,在大气数据计算机实验系统设计中,可以应用虚拟仪器技术提升系统设计性能,发挥积极影响,可在实践中推广应用该技术.     

基于虚拟仪器的水电机组在线振动监测系统

介绍了基于虚拟仪器的在线振动监测系统的基本组成、实现方法和功能,采用PXI总线仪器和LabVIEW可视化的虚拟仪器系统开发平台,把传统仪器的所有功能模块集成在一台计算机中,用户可以通过修改虚拟仪器的软件改变其功能与规模。该系统实现了水电机组振动信号的自动采集,并能通过计算机进行振动信号的处理和分析。     

滚珠丝杠副加载试验台测控系统设计

一体化工业计算机系统目前在测控领域应用广泛.通过对滚珠丝杠副轴向力加载试验功能分析,拟定了滚珠丝杠副轴向力试验方案,构建了基于一体化工业计算机控制的测控系统,基于虚拟仪器技术平台和LabVIEW编程语言,设计了测控软件.实践验证与测试表明,一体化工业计算机结合虚拟仪器技术平台开发测控系统可以大大降低其软、硬件研发周期.     

计算机辅助概念设计研究进展

以第4届国际计算机辅助工业设计与概念设计会议为背景，阐明了产品概念设计的内涵，指出计算机辅助概念设计CACD要解决的三大问题：概念设计方法学、产品信息模型及求解方法、计算机辅助概念设计技术；进而从智能概念设计技术、协同概念设计技术、虚拟概念设计技术、需求驱动概念设计技术等多个方面总结了CACD技术的研究进展，最后指出了CACD的发展趋势，并提出了CACD的三层架构．     

试论电脑美术与传统视觉艺术的关系

电脑技术发展日新月异,电脑美术设计水平也得到了很大的提高。电脑美术设计借助电脑这一制作工具,为现代设计的发展提供了便利的条件。本文主要对电脑美术设计和传统视觉艺术关系进行了讨论,首先对电脑美术设计进行了概述,然后论述了电脑美术设计和传统设计的关系,最后对电脑美术开拓设计新领域的情况进行了详细阐述。     

Design and feasibility study of an integrated pointing device apparatus for individuals with spinal cord injury

Despite the commercial availability of numerous computer-pointing devices, many severely disabled individuals still rely on customized equipment to operate computers. This study presents a novel Integrated Pointing Device Apparatus (IPDA) that integrates numerous commercial pointing devices. The novel IPDA, which complies with a standard USB 1.1 interface, is compatible with most tested computer-pointing devices and flexibly integrates commercial computer devices, tailoring them to suit individual needs. By using simple integrated circuit design and low-cost electronic components, this low-cost apparatus is easily maintained. The feasibility of the IPDA was evaluated by four subjects with high-level cervical (C4-5) spinal cord injury (SCI). Participants performed normal move-and-click and drag-and-drop tasks typically performed by computer pointing devices. Each participant not able to use a traditional computer mouse or trackball were able to operate a computer adequately with the IPDA and three including one operating a trackball with his chin, operated computers easily and smoothly. This feasibility study showed that the IPDA effectively integrates commercial pointing devices, thereby providing the possibility for some people with SCI to obtain computer operability. This study demonstrated the advantages of flexibility, low cost, and acceptable efficiency of the novel IPDA.     

Ergonomic aspects of installing graphics CAD systems

This paper discribes the practical aspects of designing a sound working environment for a CAD system. Installation requirements with reference to both the designer and the computer suite are examined. Alternative designs for work stations were proposed and evaluated. The actual layout of the COMPASS(computer orientated management, production and scheduling system) suite is described. The needs of the designer working within a CAD system are considered and some general observations and conclusions concerning the installation of CAD systems are made.     

协同商业CAD系统中的协同设计模型的研究与实现

介绍了协同商业ＣＡＤ系统中的协同设计模型,基于ＳＱＬＳｅｒｖｅｒ解决了协同设计模型设计中的并发控制,一致性保证和多用户界面等问题。由于可实现数据共享、并行设计,从而可缩短设计周期;而 计算机进行协调又可减少协 时间并保证正确性。     

Effective affective user interface design in games

It is proposed that games, which are designed to generate positive affect, are most successful when they facilitate flow (Csikszentmihalyi 1992). Flow is a state of concentration, deep enjoyment, and total absorption in an activity. The study of games, and a resulting understanding of flow in games can inform the design of non-leisure software for positive affect. The paper considers the ways in which computer games contravene Nielsen's guidelines for heuristic evaluation (Nielsen and Molich 1990) and how these contraventions impact on flow. The paper also explores the implications for research that stem from the differences between games played on a personal computer and games played on a dedicated console. This research takes important initial steps towards defining how flow in computer games can inform affective design.     

基于VMware的计算机实验教学设计

本文指出了目前开展计算机实验教学存在的局限性,介绍了虚拟机技术的原理以及VMware软件,设计与实现了基于虚拟机技术的计算机组装和维护、操作系统、网络组建与维护、服务器配置与管理以及网络安全等多个实验,并对基于虚拟机技术的计算机实验作了评价。     

计算机辅助草绘设计技术研究

计算机辅助草绘技术结合了计算机与纸笔草绘的优点，比较适合于概念设计，便于帮助设计师快速记录下头脑中产生的瞬时灵感，近年来一直成为许多专家学者争相研究的热点课题之一。该文从产品设计的领域出发简要介绍了计算机辅助草绘设计的研究现状。并从支持草绘的用户界面设计、低层草图处理、高层草图语义理解、三维草绘建模4个方面分析比较了计算机辅助草绘一些关键技术的研究方法，指出了下一步的研究重点。     

计算机通信网络可靠性设计初探

在对计算机网络可靠性的具体内容进行论述的基础上,分析了当前计算机网络可靠性设计的发展趋势。同时,对计算机通信网络可靠性设计的重点节点进行了分析,以提高计算机通信网络可靠性为基本目的,提出了提高计算机通信网络可靠性设计的相关策略,为计算机通信网络可靠性的提高以及网络优化提供参考。     

CENTRALIZED VS. MARKET-BASED AND DECENTRALIZED DECISION MAKING: A REVIEW

Within both economics and computer science, many authors have claimed that decentralized or market-based approaches to decision making are superior in general to centralized approaches. The contrary claim has also been made. Unfortunately, these claims are often supported only by informal or anecdotal evidence. In order to assess these competing claims, we present a review of the literature in economics and computer science with a bearing on these issues. Our main findings from this literature survey are as follows: (1) for efficiency assessments, there is wider variance in performance of organizations using market-based control (MBC) than in organizations using centralized control (CC); (2) that MBC and CC have the same efficiency on average, which may explain the observation that (3) human and computer organizations tend to cycle between CC and decentralized control (DC) structures.