基于ARM的远程监控系统的设计

视频监控系统随着嵌入式技术、多媒体技术、计算机网络技术的快速发展也在不断地更新。本文设计实现了一个基于嵌入式处理器ARM9的网络视频监控系统。利用linux操作系统提供的V4L2API实现对视频设备的视频数据采集;使用Libjpeg进行视频压缩,实现了视频数据的网络传送和远程监控。基于嵌入式技术的网络视频监控系统与传统的视频监控系统相比具有体积小、成本低、稳定性高、实时性好等优点,具有广阔的应用前景。     

嵌入式网络数字视频监控系统的设计

基于网络的嵌入式数字视频监控系统是一个非常庞大的系统,涉及到硬件、软件等技术,设计一个科学的监控方案是实施视频监控系统的一个关键步骤.利用现有网络资源,应用网络视频监控设备,将监控信息完全数字化,可实现嵌入式网络数字视频监控.探讨了该系统的相关功能的设计要求,规划了整个监控模型,并提出了系统软硬件关键技术的实现方法.将嵌入式网络数字视频监控系统成功应用于校园网络的无人看护,使用情况表明其性能良好,具有很大的实用价值.     

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.     

基于ARM-Linux无线视频监控系统的设计

针对现有监控系统布线麻烦、维护成本高、移动性差、应用范围受限的缺点,提出了一种基于ARM处理器和无线传输技术的嵌入式视频监控系统设计方案.以嵌入式Linux和嵌入式微控制器S3C2440为系统核心平台,设计了视频采集模块、无线传输模块和嵌入式Web服务器,将摄像头采集的视频信号,经过无线网络传输,实现对测试现场的网络视频监控.实验结果表明,该系统具有布线简单、移动性好等优点,能够实现本地和远程控制,具有广泛的应用前景.     

基于S3C2440的远程监控系统的设计

鉴于嵌入式监控系统具有可靠性好,成本低的优点,本文介绍了一种基于linux操作系统和arm处理器的远程视频监控系统。通过V4L2标准不间断的采集视频图像,经过基于MJPEG的算法对视频压缩后进行传输。本系统的压缩视频在传输时使用RTP／TCP协议来保证视频的实时性要求。通过USB摄像头,嵌入式硬件平台和主控计算机三部分构成了一个高质量、监控方式灵活、可靠性好的网络视频监控系统。     

嵌入式构件技术探究

嵌入式网络视频监控系统是新一代的监控系统,它体积小易于布控、功耗低、稳定性高、具有良好的性价比,与传统的基于PC机的监控系统相比具有强大的优势。随着硬件的变革,嵌入式网络视频监控软件系统也需要从基于PC机的开发转移到基于ARM的嵌入式系统的开发上,嵌入式系统有不同于通用PC的诸多新特点,对嵌入式系统下视频监控系统开发提出新的要求。     

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ARM的视频监控系统的设计与实现

随着计算机技术和图像处理技术的发展,数字视频监控系统得到了广泛应用.随着嵌入式技术和网络技术的发展,出现了基于嵌入式和Internet的视频监控系统.介绍了基于ARM微处理器的嵌入式网络视频监控系统的组成,着重阐述了监控系统的原理、设计方案,硬件模块和软件模块的实现方法.     

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.     

嵌入式网络视频监控系统的硬件设计与实现

为了建立具有自主知识产权的第三代网络视频监控系统,本论文介绍了国内外视频监控系统的发展现状。通过比较第三代网络视频监控系统与第二代网络视频监控系统的异同,指出第三代网络视频监控系统的优缺点。通过研究faraday提供的网络视频监控系统的解决方案,给出了基于嵌入式技术的网络视频监控系统的详细硬件结构与框图。     

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.