嵌入式实时数据采集系统的设计与实现

设计了一种基于ARM9与Linux的嵌入式实时数据采集系统.通过对数据采集实时理论的研究和时系统应用需求的分析选择设计了系统的软硬件,其中主要包括基于AD7892的采集模块硬件设计,对操作系统Linux的配置移植,采集模块驱动程序的编写等.提出了用一个环形内存池数据结构代替传统的FIFO,并在此基础上通过Linux多线程技术实现了一个实时数据采集系统.测试表明系统具有较高的采样速率和实时采集性能,并实现了大样本数据连续不丢点存储.     

基于ARM嵌入式Linux的数据采集系统设计

针对传统数据采集系统的不足,文中介绍了一种基于ARM9的数据采集系统的设计原理和实现方法;以微处理器S3C2440A为核心,外扩高精度A/D芯片AD7606,设计了数据采集硬件电路,分析了AD7606和PWM定时器的基本工作原理,借助于移植的嵌入式Linux操作系统,实现了基于PWM和GPIO口的ADC驱动及相应的数据缓冲与软件抗干扰;测试结果表明,由ARM和Linux组成的数据采集系统具有操作方便、采集精度高和测量结果准确等优点.     

基于Linux的嵌入式数据采集系统

数据采集系统是集计算机、通信及电子技术、工业控制为一体的综合探测系统.本文介绍了基于嵌入式Linux的数据采集系统的硬件结构和软件设计.为提高系统的实时响应性能和多任务处理能力,在硬件上采用ARM9微处理器技术,同时移植Linux操作系统,使系统的可靠性和可扩展性得以提高.设计中充分利用了嵌入式Linux的特点.系统软件模块有数据采集模块、数据处理模块、数据通信模块和数据诊断模块.将嵌入式Linux操作系统引入数据采集系统的设计中,加速了系统的开发,方便了将采的功能扩展,提高了观测数据的及时性和准确性,实现了观测的自动化.     

嵌入式自动指纹识别系统设计

设计了一款基于嵌入式技术的自动指纹识别系统(AFIS),系统的硬件采用TCS316指纹识别模块和基于S3C2440 ARM9处理器的嵌入式mini2440 ARM平台,基于上述硬件开发了自动指纹识别软件,软件设计基于嵌入式Linux操作系统,采用模块化编程。所设计的指纹识别系统实现了指纹录入、搜索、比对、删除及指纹库清空等功能,并结合在考勤方面的应用,设计了基于Linux的QT触摸屏应用界面。实验结果表明系统的硬件和软件都能较好的工作,达到了预期的目的。     

基于S3C2440的图像采集与显示系统

设计一种基于S3C2440硬件平台和嵌入式Linux操作系统的图像采集与显示系统。该系统通过USB摄像头采集图像数据,利用Vide04Linux模块提供的编程接口,实现图像的采集设计,基于Qt／Embedded实现LCD实时显示,并经JPEG压缩算法对图像进行压缩编码用于图像处理或网络传输。整个系统建立在嵌入式架构上,能独立完成实时图像采集、显示及压缩功能,可广泛应用于智能交通、计算机视觉等领域。     

基于ARM的图像采集与显示系统设计

本文介绍了嵌入式linux系统的特点,然后以S3C2410平台为硬件开发环境,介绍了在该平台下基于USB摄像头的图像采集与显示系统的设计,实现了在linux2.4.18系统下LCD显示,并实现了将采集的图像数据保存成JPG或BMP文件格式,以备后继开发应用。     

电缆管道巡检机器人嵌入式系统的设计与实现

针对电缆管道巡检机器人的任务需求,提出了一种基于DM6446的嵌入式测控系统.从硬件和软件两方面详细介绍了嵌入式系统的设计和实现方法.硬件上采用以高集成度的DM6446双核处理器为中心的模块化设计;软件开发中基于Linux的层次化架构和多进程/多线程管理实现了运动控制、视频采集、参数检测、网络传输等功能.达芬奇技术的应用和实现保障了机器人实时视频编码和视频数据的传输.各种测试结果表明了嵌入式系统设计的合理性,整体机器人实现了各项功能技术要求.     

Linux下Wi-Fi驱动程序的设计与实现

针对目前流行的Wi-Fi无线通信模块在嵌入式系统开发中的应用要求,设计开发了Linux下基于ARM9处理器S3C2440的Marvell 88W8686 Wi-Fi驱动程序.结合S3C2440与88W8686的硬件连接以及Wi-Fi驱动程序体系结构,给出了网络设备初始化和数据传递、转发的实现过程.实验结果表明,该Wi-Fi驱动程序能够实现预期目标,并已成功应用于系统开发.     

基于嵌入式Linux语音识别系统的设计

该设计运用三星公司的S3C2440,结合ICRoute公司的高性能语音识别芯片LD3320,进行了语音识别系统的硬件和软件设计。在嵌入式Linux操作系统下,运用多进程机制完成了对语音识别芯片、超声波测距和云台的控制,并将语音识别技术应用于多角度超声波测距系统中。通过测试,系统可以通过识别语音指令控制测量方向,无需手动干预,最后将测量结果通过语音播放出来。     

基于Linux 的嵌入式视觉系统

结合当前嵌入式产品的发展方向,提出了一种基于ARM9和Linux的嵌入式视觉系统,阐述了其硬件架构与软件组成,通过配置和加载各种设备驱动程序,利用V4L接口函数实现图像采集与显示。设计的嵌入式视觉系统体积小,成本低,可移植性强,通过实验波形和数据验证了其具有良好的图像采集和显示性能。     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。