基于嵌入式Web服务器家居视频监控的研究

针对智能家居的远程监控问题提出了一种基于ARM,Linux和计算机网络的视频监控系统。该系统以ARM9芯片S3C2440为硬件平台,以Linux操作系统为软件平台。首先将USB摄像头采集的视频信息进行处理,然后通过Web服务器网络进行传输,最后用户通过浏览器即可对远程视频进行实时的监控。     

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.     

基于嵌入式Linux的视频监控系统的设计

介绍了一种网络视频监控系统实现方噪,系统以嵌入式Linux和基于Xscale架构的PXA255处理器为核心平台,通过嵌入式平台将摄像头采集来的视频信号,经过网络传输给服务器,完成对考试现场的网络视频监控任务。详细介绍了嵌入式平台上USB设备的驱动开发以及嵌入式Linux下应用程序的设计。     

基于ARM的远程视频监控系统设计

着眼视频监控网络化发展需求,开发了一种基于ARM的远程视频监控系统;系统的硬件以ARM S3C2440嵌入式芯片为核心,设计了硬件系统的电源、以太网接口、JTAG接口、数据存储等主要模块的电路结构;系统的软件以Linux为操作系统,利用Vide-o4Linux完成视频图像的采集,采用JPEG图像压缩技术实现视频的压缩处理,并用实时传输协议RTP实现对视频图像的封装和网络传输、控制;测试结果表明,该视频监控系统硬件结构小、功耗低、占用资源少,启动时间仅需20ms,网络实时视频图像传输速率达到25～30fps,实现了远程视频图像的实时网络化传输,具有一定的实用价值。     

基于嵌入式Linux的视频监控系统的设计

介绍了一种网络视频监控系统实现方案,系统以嵌入式Linux和基于Xscale架构的PXA255处理器为核心平台,通过嵌入式平台将摄像头采集来的视频信号,经过网络传输给服务器,完成对考试现场的网络视频监控任务。详细介绍了嵌入式平台上USB设备的驱动开发以及嵌入式Linux下应用程序的设计。     

基于S3C2410嵌入式无线视频监控系统的设计

介绍了一种基于S3C2410硬件平台和嵌入式Linux操作系统的视频监控系统的总体设计方案,在嵌入式Linux平台下利用软件实现视频数据的采集、MPEG-4编码和网络传输;阐述了系统的总体结构和各部分功能特点,选择xvidcore作为本系统中视频图像压缩模块中的核心算法;采用以嵌入式Linux系统为核心,基于其良好的网络功能,通过USB摄像头实时获取视频和CDMA模块完成无线网络及Internet的接入;控制终端利用Wi-Fi无线局域网技术通过AP接入Internet,真正实现视频监控的无线化,满足无线视频监控系统的要求。     

基于ARM9处理器的网络视频监控系统设计

设计了一种以高性能DSP及ARM9处理器(ARM940T核)为主要部件的网络视频监控系统,重点分析了H.264算法特点及其处理方法,并对监控系统的视音频采集压缩卡进行了设计;通过嵌入式Linux操作系统融合整个系统,形成了一套完整的网络监控系统解决方案,最终可实现网络监控系统的小型化;通过对实际监控系统网络数据传输、数据存储及视频画面质量等各项指标测试、比对,达到了设计中的要求;采用DSP进行H.264算法处理图像质量好,压缩码流便于ARM处理器处理,提高了数据处理运行速度.     

基于 ARM9的便携式网络监控取证系统设计与实现磁

针对传统监控取证系统体积大、移动性差、成本高等不足,运用嵌入式技术,视频处理技术及无线网络传输技术,设计了一种基于 ARM9的便携式网络监控取证系统[3]。该系统以 ARM9芯片 S3C2440为硬件平台,以 Linux 操作系统为软件开发平台,将 USB 摄像头采集到的图像数字化后经过 MPEG-4压缩算法的处理,通过构建嵌入式 Web 服务器[2]以及 Java Applet 技术[1],实现了远程监控端通过 IE 浏览器对现场的监控取证,最终形成了一套集视频采集、预处理、存储、显示、传输为一体的便携式视频监控取证终端系统。     

嵌入式视频图像传输系统的设计与实现

本文介绍了一种基于嵌入式Linux和S3C2410平台的视频传输系统。该系统通过USB摄像头采集视频数据,采用Video4Linux模块提供的编译接口进行视频采集程序的设计,经MPEG-4压缩算法对视频流进行压缩编码,通过实时传输协议(RTP)和实时传输控制协议(RTCP)配合使用实现流媒体数据的网络传输。整个系统建立在嵌入式构架上,能独立完成实时视频的采集、处理及传输功能,可广泛应用于远程监控系统、可视电话、工业控制等领域。     

基于OMAP5912远程视频监控系统的设计与实现

以OMAP5912和MontVista Linux为平台,设计和实现了基于B／S模式的远程视频监控系统,并阐述了系统总体结构、硬件组成、软件开发平台的建立、摄像头驱动实现、视频采集和编码、视频的网络传输。实际应用表明,系统运行稳定,视频流畅,满足了视频监控的要求。     

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.