C-MBUS总线在倒车雷达系统中的应用

为减少汽车倒车时的碰撞事故,采用C-MBUS总线技术和超声波测距技术相结合的方法,设计了倒车雷达系统.该系统利用LCD显示车辆与障碍物的距离和大致方位,并根据实际结果,采用不同的语音进行提示,对不同频率的声音进行报警.该系统具有结构简单、精度高、成本低廉和可靠性强等优点,能够满足倒车时障碍物检测的需求.     

单片机控制的超声波测距仪汽车倒车系统的设计

本文设计一种基于单片机STC89C52的超声波测距仪汽车倒车系统,介绍了超声波测距的基本原理,阐述了倒车雷达系统的结构组成、硬件电路设计,并在数据处理部分采用温度补偿消除温度对声速的影响,提高了测距精度.倒车距离采用LCD进行实时显示,并通过语音报警电路对不同距离段做出不同的语音提示.实验表明该倒车雷达系统在30～ 5...     

汽车可视倒车雷达预警系统的设计与实现

针对汽车倒车时的后视不良引起的倒车事故,介绍了一种可视倒车雷达预警系统装置的设计方案;该系统在汽车挂倒挡时开始工作,通过超声波传感器发送超声波检测障碍物信息,经微处理器处理成测距信息,同时系统启动后视摄像系统,将汽车后视摄像信息与障碍物距离信息通过视频字符叠加处理后,发送到TFT_LCD屏驱动模块显示;当距离小到一定范围时,自动启动真人语音报警;该系统安装简单、抗震能力强、后视图像直观真实、测距准确且工作稳定可靠。     

基于ARM的超声波倒车雷达报警系统设计

本文设计了一种基于ARM的超声波倒车雷达监测报警系统。该系统在汽车挂倒挡时开始工作,通过超声波传感器发送超声波检测障碍物信息,经微处理器处理成测距信息,并进行显示,当距离小到设定的安全范围时,自动启动语音报警。该系统安装简单,抗震能力强,测距准确且工作稳定可靠。该文给出了系统各部分的硬件及软件实现。     

基于ARM的超声波倒车雷达报警系统设计

本文设计了一种基于ARM的超声波倒车雷达监测报警系统。该系统在汽车挂倒挡时开始工作,通过超声波传感器发送超声波检测障碍物信息,经微处理器处理成测距信息,并进行显示,当距离小到设定的安全范围时,自动启动语音报警。该系统安装简单,抗震能力强,测距准确且工作稳定可靠。该文给出了系统各部分的硬件及软件实现。     

超声测距在汽车倒车中的应用

为了帮助汽车驾驶员实现安全倒车的目的,根据超声波测距的工作原理,采用AT89C52单片机系统、温度传感器及超声波传感器为硬件核心,采用单片机C语言编写程序,设计出一套具有实时超声波速度修正及可多方位进行检测扫描的超声波测距系统.实现汽车在倒车过程中一旦接近有障碍物时,立刻自动报警并显示出汽车尾部到障碍物距离的功能.     

基于Android的可视倒车系统设计

设计的可视倒车系统是在Android操作系统平台下,以三星公司的S3C6410作为处理器,利用OV9650摄像头对汽车尾部的实时路况信息进行采集,通过LCD显示屏直观的呈现出来,以语音报警系统和超声波测距作为辅助,完成整个可视倒车系统的软硬件设计,达到清晰显示倒车路况的同时,实现比较精确的测距和障碍物距离语音报警,克服倒车盲区。     

汽车障碍物检测系统的设计

针对当前汽车事故的频繁发生,为有效降低事故率,文中介绍了以一种以8051单片机为核心的结构简单、精度较高、测距较长、可靠性较高的汽车障碍物检测报警系统.该防撞报警系统利用超声波测距原理,结合了温度传感器进行实时温度的测量,对行进中的汽车前方的障碍物进行实时测距,并且能及时进行障碍物距离的显示及声光报警处理;该系统比较适合在空气能见度低,汽车倒车及晚间行驶等情况下汽车低速行使过程时使用,文中详细阐述了系统的硬件结构和软件设计.     

基于超声波测距的汽车倒车报警器设计

详细介绍了一种超声波测距系统及根据该系统设计、研制的汽车倒车防撞测距报警器。它能在汽车倒车时自动检测并显示车尾与最近障碍物之间的距离。当到达安全极限距离时，它能发出声光报警，提醒司机刹车。另外，在倒车过程中它还能发出“倒车，请注意”的报警声提醒行人注意。     

基于超声波的倒车防撞报警系统设计

超声波倒车防撞报警系统又称为倒车雷达,是为了解决倒车过程发生的碰撞问题,提高驾驶员驾驶的安全而设计的。系统核心为超声波测距系统,由主控芯片、超声波发射电路、超声波接收电路和显示模块组成。系统以STC89C51单片机为主控芯片,以555定时器为超声波发射电路核心,CX20106A为超声波接收电路核心,以液晶LCD1602为显示模块核心,同时增加测温补偿模块和声光报警电路。此系统结构简单、成本低、易于控制。     

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。     

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。