某型鱼雷发控系统便携式测试系统的设计与实现

本文介绍了某型鱼雷发控系统便携式测试系统的设计与实现，对测试系统应用软件的设计与实现及测试系统彩的关键技术重点介绍。     

基于PXI总线的某红外成像导引头便携式测控系统设计

某红外成像导引头在多种试验场合需要对其进行功能和性能测试,现阶段导引头研制过程中配备的测试设备,已逐渐难以满足通用化、轻小型化和高机动性的要求;因此,针对导引头多种试验环境下的测试需求,综合考虑可靠性和经济性等因素,研制了一套基于PXI总线的便携式导引头测控系统,该测控系统具有重量轻、体积小、组装快速等特点,大大提高测试效率;阐述了其系统组成及工作原理,详细介绍了硬件选型及自研LVDS板卡设计、测控系统软件架构设计及测试流程设计;实际应用结果表明：测控系统既满足导引头测试设备测试性、稳定性、可扩展性等总体要求,同时满足转运方便、展开快速、环境适用性等要求。     

起动机性能微机测试系统

针对起动机电流大、工作短时的特点，研制了起动机性能微机测试系统。本文介绍了测试系统的组成、工作原理、软件设计、控制策略和抗干扰措施，特别叙述了本系统设计中的一些技巧和特点。现场运行表明，系统设计合理，检测精度高，控制时间短，抗干扰能力强。     

一种便携式汽车制动性能检测仪

应用非接触光电传感器和嵌入式系统技术，研制了适用于汽车道路试验用的制动性能检测仪。实测表明，该仪器具有运行可靠，操作简单，报表清晰等优点。     

便携式自动测试系统设计与实现

针对机载吊舱装备的现有人工测试平台体积大、机动性弱、人工操作繁杂、耗时长等问题,在测试需求分析基础上设计了一款便携式自动测试系统。该系统采用模块化和便携式设计思想,以PXI加固工控机为核心,基于PXI仪器和适配器构建硬件平台。软件方面基于Visual C+〖KG-*3〗+,采用分层架构实现各类仪器的控制处理和人机交互,集自动测试、分步测试、系统自检、数据管理、用户管理等多种功能于一体。经试验测试,该系统实现了吊舱25类测试项目的全自动测试,整个测试时间由原来12 h以上压缩至2~3 h,显著提升了测试效率,较好地完成了测试任务和保障工作。     

便携式车辆平顺性测试系统开发

针对摩托车等轻便车辆平顺性测试的需求,基于虚拟仪器理念开发便携式车辆平顺性测试系统。合理地选择传感器、放大器、采集器等硬件设备,设计了简单实用的触发开关,组建了可以脱离计算机独立进行采集的硬件系统。参照人体振动评价方法设计开发了平顺性分析软件,可从时域法和频域法进行处理分析。实际应用表明:测试系统方便可靠,能很好地完成车辆平顺性测试分析和评价。     

便携式动态信号采集分析系统的研制

介绍了一种基于PCMCIA接口的便携式动态信号采集分析系统的设计。在硬件设计部分描述了该系统的硬件配置和PCMCIA数据采集卡DAQP-12的技术特性和内部结构，在软件设计部分讨论了基于LabWindows／CV16．0和多线程模型的虚拟仪器设计过程。结果表明，该系统非常适合用作野外工程现场的信号测试与分析。     

CAN总线式汽车组合仪表校验系统开发

针对某引进车型CAN总线轿车仪表，采用工控机、基于单片机的数据采集器等硬件，与VB6．0平台上开发的软件构成了一套完整的性能校验系统。经实际应用表明，该系统具有测试精度高、开发成本低、抗干扰能力强、检测效率高、操作简单等优点。从硬件和软件两方面对测试系统的实现方法及功能进行了详细的介绍。     

卫星地面电缆便携式测试系统设计

为了满足卫星地面测试电缆和大型试验场地电缆的现场测试需求,为此研制了一种便携式、小型化、自动化的电缆测试系统。该系统采用嵌入式计算机技术、功能电路模块化设计以及良好的人机交互界面。结合不同的配套转接电缆,经实际应用,系统可实现最大100芯卫星地面测试电缆的导通测试和绝缘测试。文中阐述了系统的组成、工作原理、硬件、软件实现方法以及实物运行结果。系统采用内电和外电两种供电方式,便于携带,适应各种测试环境和试验场地,测试操作简单,测试速度快,效率高,大大减少人力成本和设备成本。     

汽车ABS气压阀体测试系统软件设计

汽车已经进入普通家庭，安全性是首要问题。采用防抱死技术是汽车制动过程中的安全措施之一，它的原理是用气囊缓冲制动过程，平稳刹车；防抱死技术简称为ABS技术。在防抱死系统中气压阀体是重要的组成部分，气压阀体的好坏直接影响制动系统的工作效果，做好气压阀体的测试至关重要，气压阀体的测试由计算机控制测试机床自动进行。测试过程是加压测试→减压测试→进气测试→排气测试。     

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.