汽车四轮定位装置及倾角传感器的应用

本文介绍了汽车车轮倾角设置对汽车行驶及保养的重要性，以及四轮定位仪的组成，并重点对车轮设置倾角的定义及作用，几种倾角产品的原理，性能及其在汽保设备四轮定位设备中的应用作了介绍。     

四轮电驱汽车的车身结构设计及动力学仿真

因受复杂的横向内力影响,四轮电驱汽车车身受力情况与传统汽车不同,传统汽车车身结构并不完全适合四轮电驱汽车.针对四轮电驱汽车的受力特点,提出了一种纵向承载横向不承载的半承载式车身结构,并通过ADAMS软件对该车身进行了动力学仿真分析.仿真和实验研究表明,该车身结构能够有效承受四轮电驱汽车在行驶工况下所受的横向内力,能有效提高车辆的稳定性、安全性和舒适性.     

四轮转向半挂汽车列车行驶稳定性仿真研究

通过分析四轮转向(4WS)半挂汽车列车行驶性能,为在牵引车上采用4WS技术能提高整个汽车列车行驶稳定性提供依据.建立4WS半挂汽车列车简化三自由度单轨动力学模型,在小角度转向和直线行驶两种行驶工况下对操纵稳定性能进行时域仿真研究.理论分析和基于MATLAB的仿真研究表明,4WS技术能使车辆的横摆角速度等状态量保持较小数值.稳定性好.最后,与只有前轮转向(FWS)牵引车列车的稳定性能作对比分析,验证出4WS对列车的高速稳定性和低速机动性有明显的好处.     

基于蓝牙技术的汽车四轮定位系统无线化设计

引言 近年来,随着我国汽车工业的快速发展和汽车保有量的大幅增加,汽车检测技术也取得了巨大的进步,汽车检测设备的功能、质量都在不断提高,正逐步向数字化、智能化、便携化方向发展。作为汽车检测的基本设备,四轮定位仪是专门用来测量车轮定位参数的设备。     

一种新型激光四轮定位的智能检测系统

本文针对传统的四轮定位方法具有检测流程复杂,其不确定度受人为因素的影响较大等问题,提出一种新型激光四轮定位检测系统,基于无线通信实现检验设备的小型化与智能化,该检测系统相较于传统的四轮定位方法检测流程简单化,受人为因素的影响大幅度降低.     

基于S函数的汽车前照灯智能转向系统仿真

为了解决夜晚汽车在弯道上行驶的"盲区"问题,提高驾驶员在夜间行驶的安全性,提出了汽车前照大灯智能转向系统,能根据汽车的行驶参数不断地对前照灯进行动态调节,确保对前方道路提供最佳的照明.根据汽车在转向过程中的行驶动力学方程,利用MATLAB中的S函数建立其仿真模型,并通过研究其工作特性给出了汽车前照大灯水平调整角度的计算方法.在无刷直流电机位置和转速双闭环仿真模型的基础上,建立了整个控制系统的仿真模型,仿真结果表明:整个智能控制系统具有快速性和准确性,对实际设计提供了参考依据.     

轮胎压力监测调整系统

提出并分析了轮胎压力对汽车安全的重要性。介绍了基于飞思卡尔半导体公司的单片机和压力温度传感器的轮胎压力监测调整系统的实现方法。利用其遥控无键输入射频技术实现传感器信号和控制信号互传,达到监控和调整每一个轮胎压力并保持其在正常范围内的目的,使汽车行驶在路上更加安全。     

基于STM32单片机的教练车转向轮转角显示仪设计与实现

针对汽车转向轮转向角度把握不好,易造成的车库移位、刮擦、追尾等事故,为帮助驾驶初学者,实时监控汽车转向轮的方向,降低交通事故发生率,开发了基于STM32单片机的汽车转向轮转角显示的系统设计,实现了汽车转向轮转角检测、按键控制、数据显示、WiFi通信、报警提示等功能;实现了汽车转向轮检测角度范围为30～40°,测量精度为1°的指标;如果汽车转向轮转角不在设置阈值范围内,则通过声音报警提示,通过按键调整汽车转向轮转角阈值,通过对系统的测试,测试结果达到最初设计的要求.该套设备可为初学者和教练员教学带来便利,也为驾驶学校教练车装备智能化提供借鉴。     

基于改进的YOLOV5算法对ADB汽车大灯的外界环境检测

针对远光灯交汇会影响汽车驾驶员的视觉注意力,导致汽车驾驶员夜间行驶安全难以得到保障的问题,研究基于机器视觉及深度学习的ADB汽车大灯的外界环境检测方法。 通过机器视觉的CCD相机采集ADB汽车大灯外界环境图像数据,利用数据筛选方法剔除采集到的图像数据中干扰光源数据,依据路况特征差异,划定ADB汽车大灯外界环境检测目标区域后,通过深度学习算法检测外界环境目标车灯光源,结合扩展卡尔曼预测各目标车灯光源轨迹,当车辆前方有车灯光源经过时,ADB系统及时调整汽车远光灯对应区域灯珠亮度,减少在高速行驶时因远光灯交汇对汽车驾驶员的视觉影响,保障汽车安全行驶。实验结果表明,该方法可有效剔除各类干扰光源,准确检测目标车灯光源,且目标车灯光源轨迹预测结果与真实结果非常接近,可精准完成ADB汽车大灯的外界环境检测。     

基于集中式控制的轿车座椅和后视镜设计

汽车后视镜是与汽车行驶安全相关的主要部件，良好的后视镜视野能保证驾驶员的行车安全。本文研究开发了一种记忆存储式后视镜和座椅控制器。该控制器能电动调节后视镜上下转动、左右转动两个角度和座椅前后滑动、前椅面高度、后椅面高度和椅背角度四个位置或角度，能在调整后记忆存储位置信息．并且可以在需要时调用位置信息。本文在讨论了硬件电路的设计后对软件程序流程进行了介绍。     

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.