基于GPRS和嵌入式Linux的远程图像监控系统

阐述了一种基于GPRs和嵌入式Linux的远程图像监控系统设计和实现方法。该系统主要由嵌入式视频采集终端和监控中心服务器组成。其中,嵌入式视频采集终端主要由摄像头视频采集模块、ARM模块、SIM900模块组成,监控中心服务器可实时监控远程终端的图像。系统软件采用嵌入式Linux,可编程实现图像数据采集、压缩和GPRs模块的网络连接与传输。     

基于ARM技术的远程图像监控系统设计

随着图像处理技术在科学技术领域的日益成熟，以及通信带宽的日益提高，应用图像处理技术的远程图像监控系统已逐渐盛行。针对无人值守行业对远程、实时监控的需要，介绍了一种基于ARM技术的远程监控系统，讨论了现场监控器配置图像信息采集模块的软硬件技术，描述了基于TCP／IP协议实现图像信息传输的方式，实现了远程监控中心对现场图像信息的监视。     

远程机器人监控系统关键技术的研究和实现

远程机器人监控系统利用Internet实时传输现场图像和发送命令,由于数据量大和实时性要求而存在不少困难,为了解决这些困难,提出四个关键技术,即：改进的行程编码技术,混合压缩编码技术,TCP协议和UDP协议的联合使用技术,TCP多路并发优化和UDP的可靠性优化技术,研究结果表明,这些重要技术既保证了命令传输的可靠性,又保证了机器人现场图象传输的实时性,从而使系统性能得到有效提高,这些技术对远程机器人监控系统的设计具有重要的创新意义。     

基于3G无线网络的高质量实时视频监视系统的设计*

提出了利用3G无线网络传输视频信号的新一代无线视频监控系统,该系统将现场采集的图像经过视频压缩编码模块压缩编码,通过3G无线网络发射到远程监控中心,实现了高质量无线实时远程监控.     

锅炉控制远程实验视频传输系统的研究与设计

对锅炉控制系统远程实验中的重要环节--视频传输进行了研究探讨,运用Winsock技术,实现了图像的存取、压缩、编码.为了加快图像的传输速度,本文采用哈夫曼编码算法对图像进行压缩和解压处理,提出了可以加快图像传输的方法,使得实验现场的画面动态更新较快.     

基于GPRS无线传输的图像监控终端实现

将GPRS无线传输技术运用到图像监控系统中,实现远程监控;文中首先介绍了远程图像系统的组成和网络拓扑.详细介绍了远程图像监控终端的现场视频处理模块硬件组成和GPRS Modem特性以及嵌入式软件流程;并介绍了图像监控终端的JPEG压缩流程和GPRS modem的通讯实现,通过上述技术综合应用,得到较好的效果。     

基于PXA255的GPRS图像传输系统设计

提出了一种基于Intel PXA255嵌入式微处理器和MC55无线通讯模块的图像采集、压缩与传输的设计方案.在PXA255的平台上,通过选择适合的芯片、无线传输模块并利用MPEG-4视频压缩技术对图像进行压缩后通过GPRS网络来实现无线图像实时传输功能,从而实现功耗低,体积小,数据传输速度快和携带方便等特点,特别适用于远程实时监控,工业控制和智能家居等环境.     

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Internet的旋压机远程通信系统设计

为满足旋压机运行状态远程实时监控的要求,并在故障发生时服务器能及时捕获设备的故障信息,设计了基于Internet的旋压机远程通信系统.将Socket编程技术、数据加密技术、图像显示技术和实时传输技术应用于所开发的远程通信系统中.该系统由于传输的数据量小,所以很好地解决了图像传输缓慢和复杂图像显示的问题.实践结果证明该远程通信系统具有高效率、高可靠性并能及时反馈现场机器设备的情况.     

基于组播的远程图像监控系统设计

为了提高变电站的自动化运行水平，实现变电站无人值班，必须对变电站的重要设施和场所进行现场图像监控。设计了适合无人值班的远程图像监控系统，它结合了网络的IP组播技术和图像压缩技术。给出了基于组播技术的监控系统的组网结构，并阐述了系统软件各个功能的实现。该图像监控系统是以光纤为媒体的远距离传输数字信号的系统，所需的带宽远低于传输未压缩图像信号的带宽，非常适合于局域网的应用系统。     

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。