高温超导体R-T曲线虚拟仪器测试系统

本文采用基于Labview的虚拟仪器技术。设计完成了一套高温超导体R-T曲线虚拟仪器测试系统，通过IEEE488总线对电流源和纳伏表的控制．利用超导体在超导态时的零电阻特性，测量超导样品的超导电性．测量精度高，速度快，测试界面直观、友好。     

行业信息

传感器市场分析(四)——GMR传感器市场 自从1988年GMR(高磁阻)效应被发现以来,世界各地有众多的科技人员都在努力探讨和开发这种材料的潜在特性。经过十几年的努力,GMR的潜在应用价值和能力已逐渐为人们所认识。 GMR材料目前最主要的应用是在磁场测量领域。第一种产品出现于1995年——计算机的GMR硬盘驱动读出探头和非易失性RAM。目前处于世界GMR研究最前沿的包括IBM等公司,1997年IBM售出了第一台硬盘装备了GMR读出磁头的计算机,从长远的角度来说,其经济效益将会远高于     

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.     

虚拟仪器技术的发展与展望

虚拟仪器是电子测量技术和计算机测控的前沿技术，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试的灵活性和可扩充性。介绍了虚拟仪器的发展、构成和应用，并对虚拟仪器技术的发展作出展望和预测。     

基于虚拟仪器技术测试系统探讨

虚拟仪器技术应用高性能的模块化硬件,结合高效灵活的软件来完成各种测试、自动化和测量等方面的应用。将虚拟仪器技术引入现代各种测量测试系统中,可以充分发挥虚拟仪器技术开发效率高、灵活性和兼容性强以及可重用度高的特点     

虚拟仪器对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。     

虚拟仪器的实现

虚拟仪器是继模拟仪器、数字化仪器、智能仪器后的新一代仪器,是电子测试领域发展的一个新方向。虚拟仪器是电子测量技术和计算机测控技术的前沿技术,它将计算机的采集、测试、分析与处理引入到电子测试领域,利用数字化技术和软件技术极大地提高了测试系统的灵活性和可扩展性。阐述了测试仪器的发展历程,给出了虚拟仪器的概念,总结了虚拟仪器的特点,重点研究了虚拟仪器的软件、硬件结构,并展望了虚拟仪器的发展前景。     

虚拟仪器与计算机采集测试分析仪器的发展和展望

虚拟仪器（ＶＩ）和计算机采集测试分析仪器－卡泰仪器（ＣＡＴＡＩ）是电子测试技术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和灵活性和可扩充性。本文就虚拟仪器和卡泰仪器的状况和发展趋势作一展望和探讨。     

基于LabVIEW和Arduino的薄膜电阻率测试系统开发

针对准确、快速检测半导体薄膜样品电阻率的功能需求,设计了一种具有较高自动化程度的测试系统。该系统可针对小尺寸薄膜样品进行自动化测试,改进了传统四探针测试设备单次测量效率低、对样品规格尺寸要求高的不足。系统采用四探针双电测组合法作为基本检测方法,以LabVIEW虚拟仪器平台为核心,联合下位机Arduino单片机,从机械运动模块、电子电路系统到顶层控制程序与计算流程进行一体化设计开发。重点介绍了集成压力检测功能的运动样品平台、电流注入与电压采集的电信号通路、基于虚拟仪器平台开发的系统控制软件,以及针对小尺寸薄膜样品的电阻率计算修正等模块的设计与实现。为检验该系统的工作性能与稳定性,以试验室氧化铟锡(ITO)薄膜为测试对象进行不同激励电流下的重复性试验。通过测试结果对比,证明了该测试系统的有效性与测试结果的稳定性。该系统的设计为快速自动化检测小尺寸薄膜样品的电阻率提供了有效的解决方案,其整体设计流程为多模块系统综合开发问题提供了新的思路。     

基于组合测试模式的集成虚拟仪器软件测试

针对集成虚拟仪器提出了一个有效的软件测试方法,满足了实际工程的需要.通过建立电子测量工作站的Petri网模型,分析虚拟仪器软件的特点,运用组合测试、分割测试、实时性测试等策略生成并优化测试用例集,对电子测量工作站软件进行测试,不仅提高了测试用例的效率,且降低了测试成本.     

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.