基于Java的车轮不圆度数据采集分析系统设计

为了实现车轮不圆度激光测量仪与计算机串口之间的数据通信,实现实时显示测试数据和对数据的后处理分析,论文设计了一套基于Java的车轮不圆度数据采集分析系统;该系统由系统界面、数据采集、数据显示、数据分析等模块组成;实现了车轮不圆度测量数据与计算机串口之间的动态采集、显示、分析处理、存储等功能;现场测试结果表明:系统各功能模块运行稳定,能动态测量并显示车轮踏面圆周的非圆化磨损情况;所设计的数据采集分析系统具有友好的人机交互界面,具备实时性、可靠性、安全性特点。     

车轮定位参数微机辅助测量系统

本文介绍一种新型汽车车轮定位参数的微机测量系统。系统采用８０３１单片微机为主机，可完成车轮定位参数、转向轮最大转角、方向盘转角范围及自由行程的自动测量及显示、打印输出；绘制阿可曼特性曲线和转向系角传动比特性曲线，还可对轮辋及夹具“摆差”进行自动补偿     

车轮定位参数微辅助测量系统

介绍一种新型汽车车轮定位参数的微机测量系统。该系统采用8031单片微机为主机，可完成车轮定位参数、转向轮最大转角、方向盘转角范围及自由行程的自动测量及显示、打印输出；绘制阿克曼特性曲线和转向系角传动比特性曲线，还可对轮辋及夹角“摆差”进行自动补偿。     

车轮定位参数微机辅助测量系统

本文介绍一种新型汽车车轮定位参数的微机测量系统，系统采用８０３１单片微机为主机，可完成车轮定位参数、转向轮最大转角、方向盘转角范围及自由行程的自动测量及显示、打印输出；绘制阿可曼特性曲线和转向系角传动比特性曲线，还可对轮辋及夹具“摆差”进行自动补偿。     

德开发出用于汽车制动的电子启动系统

德国莫赛德斯——奔驰公司和路卡斯公司 (汽车零件制造厂商 )联合开发成功一种用于汽车制动的电子启动系统 ,它可使汽车刹车距离减半 ,从而减少事故的发生。研究中发现 ,70 %的司机在紧急情况时会迅速反应 ,但踩踏刹车时用力不充分 ,只利用了汽车制动能力的三分之一。而新的电子系统则解决了这一问题。该电子启动系统与刹车助推器相连。当汽车处于行驶状态时 ,电子启动系统可以测出车轮的转速 ,并根据车轮的速度调整制动压力。当车辆制动时 ,电子启动系统的微处理器可以测量到刹车踏板的状态 ,判断是否为紧急制动 ,如果是 ,即刻启动刹车助推…     

关于凸轮轴测量系统的数据分析

凸轮轴的精度直接影响到汽车发动机的噪声、动力性能、经济性等整体性能指标,德国汽车工业提出了测量能力指数Cg.介绍了一种凸轮轴综合测量仪的设计,并对该测量仪的数据进行了Cg分析.经分析认为,所研制的凸轮轴测量仪达到使用要求.     

基于车轮力传感器的汽车制动测试系统开发及应用

在车轮力传感器设计的基础上,研究和开发汽车制动测试系统,并用面向对象程序设计语言编制测试软件,最后进行了实车试验。该系统的成功开发可以克服台架制动试验工况模拟不准确的不足,从而能大大提高汽车制动性能测试的可靠性,进而为汽车制动系统设计和整车开发奠定基础。     

基于动力学模型的汽车制动稳定性虚拟展示

现有3D引擎的物理模型不能真实反映车辆制动时的运动状态。为此,提出一种汽车制动稳定性虚拟展示系统。建立汽车动力学模型,包括四轮车辆模型和车轮轮胎模型,利用上层仿真软件对动力学模型进行运算和虚拟场景渲染,给出车轮状态和虚拟仪表的展现方法,并基于3D引擎设计虚拟展现系统。实验结果表明,该系统能同时观测整车及车轮的运行状态,实时再现制动过程中车轮抱死、车身横摆侧滑的行为,其动力学模型能够满足虚拟展现对画面渲染的实时性、连续性要求。     

基于单片机的多功能手持测量仪的设计

传统测量仪由于结构复杂、功能单一,价格昂贵,已经不能满足人们的需要。基于单片机的手持测量仪具有体积小,功耗低的优点。随着单片机系统功能不断加强,基于单片机的集成测量系统也得到了广泛应用。本文基于STC12C5A60S2单片机设计了一种手持测量仪,能对温湿度、噪声、距离进行实时测量。通过温湿度传感器DHT21、噪声传感器、超声波测距模块来对环境参数进行采集,采集到的模拟信号经过单片机A／D转换,利用按键模块在LCD12864液晶上进行显示。系统能对超过设定的参数值进行报警。     

PROTEUS在智能RLC测量仪研制中的应用

本文利用功能强大的PROTEUS仿真软件设计以89C51单片机系统为核心的RLC智能测量仪。设计过程简单，方便，大大提高了设计的效率，降低了设计成本，并且设计的RLC智能测量仪能实现RLC参数的自动测量和显示，结构紧凑、操作方便．测量精度高、响应快、测量范围宽。     

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.