基于LabWindows/CVI风洞数据采集系统的应用研究

介绍了基于LabWindows/CVI虚拟仪器开发环境下动态风洞实验数据的采集.测试系统由主控(上位机)和从控(下位机)两部分构成,上位机用LabWindows/CVI开发,为用户提供良好的测试界面,下位机实现对动态系统压力测试的实时测量.该系统具有友好的人机交互界面和易操作性,大大提高了测量的有效性和可靠性.     

电动天窗耐久性测试系统的研制与开发

提出了一种基于VB串口通信的电动天窗耐久性测试系统的软硬件实现方案.该系统包括PC机构成的上位机和单片机构成的下位机.上位机提供了良好的人机交互界面;下位机采用集成电路,以及信号采样、V/F、F/V转换和D/A转换,通过串口通信将单片机与PC机连接.借助这一系统,可方便灵活精确地实现对各种电动天窗的耐久性测试.     

某型瞄准线稳定测试系统RS232串行通信的研究

某型瞄准线稳定测试系统是用于测试和检验班组武器系统、轻型低空反导转管机枪等武器系统中的光电跟踪子系统瞄准线独立性能的专用设备;介绍利用LabWindows/CVI实现上位机与下位机之间的通信,设计了瞄准线稳定测试系统,分析了下位机需要实时检测的物理量信息;为了提高系统的可视性和实现对下位机的控制,通过RS232串行通信技术向上位机传输数据;对上位机利用LabWindows/CVI的控件实现数据采集,数据显示和存储进行了研究;实验结果表明,基于LabWindows/CVI的RS232串行通信的上位机数据采集与显示系统具有可视性强、操作简单等特性。     

基于CVI串口通信在火焰探测中的实现

基于CVI设计了一个用于火焰探测的串口通信系统,该系统采用新的数据传输协议,实现了和下位机四通道数据实时通信的功能,并对接收的数据进行处理、显示和保存等。该系统充分发挥了CVI强大的函数库功能,具有操作简单、方便、界面友好、可扩展性强、成本低和可靠性高的优点。经过电脑仿真测试和实际下位机连接测试,系统可有效抑制传输错误,能实现火焰探测中的串口通信。     

一种区间温度的智能监控系统设计

本文介绍了一种用于监控区间温度的智能系统,讨论了系统的工作原理、系统硬件结构、软件开发。系统下位机以单片机为核心实现温度测量和动作控制,上位PC机采用VB6.0设计监控界面,单片机和PC机通过串口通信。该设计用户界面友好,具有较好的准确性和实用性。     

中性束注入器测试台的中央定时系统设计

为使中性束注入器各子系统在相应时钟控制下协调工作,设计一套中性束注入器(NBI)测试台的中央定时系统。采用VC++6.0开发上位机人机交互界面,实现对下位机配置和监控。下位机基于QNX系统软件平台和带有CPCI-7249R高速数字I/O板卡的CPCI工控机硬件平台来产生定时脉冲信号。实验表明,该定时系统可以完成100 μs的高精度定时,运行稳定可靠,满足NBI测试台实验运行的定时要求。     

双离合变速器比例阀耐久测试台控制系统的设计

介绍了双离合变速器比例阀耐久测试台控制系统的设计,首先描述了系统方案设计,包括油箱系统、压力油路和温度油路。然后,阐述了上位机加下位机组成的控制系统。系统上位机采用西门子工控机、NI数据采集卡加LabVIEW软件的模式,下位机使用S7-300 PLC进行控制,上下位机之间采用OPC技术进行通信。该耐久测试系统具有自动化程度高、操作简单、安全可靠以及节能的优点。     

基于LabWindows/CVI的生物发酵监控系统的设计

在本文设计的发酵系统中,上位机通过工业以太网与嵌入式下位机通信。利用LabWindows/CVI设计的良好的SCADS监控界面,实现实时数据和历史数据曲线的显示,通用高级控制算法接口。利用DataSocket技术,实现多个发酵系统的网络监控。     

科技动态

NI Lab Windows/CVI 8．0 加速测试的执行和发布 美国国家仪器有限公司(NI)推出 NI Lab Windows/CVI 8．0,它是基于ANSI C开发环境的用于测试和自动化的最新 版本。该软件为Intel、Microsoft和Bor- land的优化编译器提供配置模板,生成 运行更快的代码,增加自动化测试应用 的吞吐量。 用户可将他们所有的测试系统软件 从开发阶段发布到生产阶段,即快速地 将他们的Lab Windows/CVI应用以及附 属系统(包括NI-DAQmx等硬件驱动), 在短短数分钟内发布到工厂的车间内。 Lab Windows/CVI加强了实时功能, 可以直接发布到NI LabVIEW的实时硬 件目标(例如PXI数据采集设备)上。     

智能化绝缘/导通电阻测试系统的研制

介绍一种智能化绝缘/导通电阻测试系统的测量原理和实现方法,该测试系统能完成对繁杂的大型电子系统电缆网的测试.在该研制方案中,利用计算机控制等技术,以PC机作为测试台主机,可以实现对电缆绝缘/导通电阻的智能化多点测量.测试节点任意,并且当测试结果超过规定范围时,可以实时显示被测试点.     

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。     

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。