嵌入式远程视频监控与点播系统设计

针对危险等复杂的工业监控场合,设计了基于ARM+Linux嵌入式系统的远程实时视频监控和历史视频点播系统.首先给出了系统的总体结构,构建了嵌入式Web服务器和嵌入式流媒体服务器,在此基础上完成视频采集模块、视频压缩处理模块、视频文件生成模块的设计.测试结果表明,所设计系统能够实现远程实时视频监控和历史视频点播,系统稳定可靠.     

嵌入式系统中视频采集与回放功能的实现

目前嵌入式系统中视频信息逐渐增多、回放质量要求不断提高,但基于USB技术的实时采集速率较低、且难以满足流畅播放要求.针对这种情况,介绍了一个主要由嵌入式处理器S3C2440A和SM501构建的视频采集回放系统.详细分析了硬件结构和软件模块的工作原理,给出了进行嵌入式视频采集工作的一般实现方法和设计流程,并完成了一个具体的演示系统.     

一种嵌入式网络视频监控系统的设计

提出基于S3C2410硬件平台和嵌入式Linux操作系统的网络视频监控系统设计方案.阐述系统的总体结构和各部分功能特点,对系统视频采集、JPEG压缩的实现进行了详细分析,并给出关键功能的软件实现方法.     

基于嵌入式μCLinux的网络视频监控系统的设计与实现

介绍了一种嵌入式网络视频监控系统,详细阐述了系统的总体结构和特点、硬件的基本框架及各部分的功能、软件的结构及实现.     

基于DSP平台的网络视频监控系统构建

本文设计实现了一个基于DSP的嵌入式智能网络视频监控系统.整个系统包括视频服务器端、视频客户端和视频控制端三大部分.其中服务器端采用自行研制的嵌入式DSP开发平台实现,具有体积小、智能判断运动目标等特点.测试结果表明,该系统运行稳定,对于D1格式的视频图像,能达到实时网络视频监控的目的.     

基于嵌入式Linux的网络视频监控系统

介绍一种网络视频监控系统实现方案,系统以嵌入式Linux和嵌入式微控制器S3C2410为核心平台,通过嵌入式平台建立的Web服务器将USB摄像头采集来的视频信号,经过网络传输,完成对测控现场和测试设备的网络视频监控任务.详细介绍了在上述嵌入式平台上USB设备的驱动开发以及如何在嵌入式Linux下实现视频采集,并完成了在该嵌入式平台上的应用程序的移植.     

企业无线视频监控系统的设计与应用

为弥补传统视频监控系统的诸多不足,针对无线视频监控系统的特点,分析企业无线视频监控系统的结构框架,重点论述企业无线视频监控系统的设计与实现,利用基于WinCE.Net的嵌入式技术和GPRS网络完成无线视频监控系统的开发。讨论企业无线视频监控系统的优点,对企业无线视频监控系统的实现做了必要的研究与探讨。     

基于H.264的嵌入式视频服务器软件设计

介绍了一种嵌入式视频服务器软件设计与实现.服务器基于μClinux操作系统,采用H.264编码标准,实现了视频输入的实时采集和传输.给出了服务器软件的总体结构、视频存储(多磁盘调度算法)、RTP传输模块的实现和发送缓冲区的结构设计.实验结果表明,系统能够保证视频的传输质量及网络带宽要求,适用于多种监控.     

基于GPRS的无线视频监控

在无线视频数字监控系统中,嵌入式技术和MPEG-4压缩编码技术越来越受关注.在研究分析了嵌入式技术和视频信号压缩技术基础上,提出了基于MPEG-4的嵌入式网络视频监控系统的设计方案,构建了基于嵌入式Linux系统和PXA255硬件平台环境,设计了视频信号采集、MPEG-4标准视频图像压缩编码和视频信号GPRS无线网络传输等功能模块,实现了基于GPRS的无线视频数字监控系统,为开发嵌入式MPEG-4数字视频监控系统的广泛应用打下了良好的基础.     

基于B/S的嵌入式视频监控系统的设计与实现

给出了一种基于B/S模式下的嵌入式视频监控系统的新的实现方案,避免了传统监控系统中无法联网、需要耗费大量存储介质、查询取证比较困难等不足.通过构建嵌入式流媒体服务器完成了视频的采集、处理、存储和传输;在此基础上搭建嵌入式Web服务器实现了对远程视频的实时监控.实验证明:系统具有很强的实时性,交互性好,开发成本低等特点,可以广泛地应用于远程视频的监控.     

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.