基于Symbian OS的无线视频监控系统

无线视频监控系统是利用现有的无线资源,采用无线收发技术,研制和开发出一套系统。它实现远程监控图像采集和传送,改变传统的短距离有线视频监控的方式。本文设计并实现了一种基于Sym bian OS的无线移动视频监控系统,移动视频采集端与终端基于Series 60平台,移动视频采集端的视频采集和移动终端的实时视频接收是通过连续绘制BMP图像实现。     

移动视频车辆监控系统的设计与实现

为了传输目标定位和视频等宽带数据,提出了一种基于GPS/TD-SCDMA的车辆监控系统设计方法。分析了新一代无线车辆监控系统的新需求,在此基础上确定了系统总体组成框架、工作流程图、数据传输协议,并对车载移动监控终端的硬件进行了选型设计,给出了系统各组成部件的软件实现方式,为了避开国际专利陷阱,视频编解码方案选用具有我国独立知识产权的AVS标准。对搭建的原型试验系统进行测试,结果表明,该系统能提供高分辨率动态视频监控,并能进行精确车辆定位。     

WebGIS在无线城域网监控系统中的研究与实现

为了实现无线城域网监控(WManS)的透明化、可视化与实时互动化,研究了无线城域网监控系统的系统架构和功能,着重分析了系统实现的关键问题以及网络地理信息系统(WebGIS)在系统的核心功能.再运用软件工程领域成熟的统一建模语言(UML)设计系统软件模型,最后通过无线城域网传输GPS信息、语音和视频等数据,运用开源网络地理信息系统工程MapGuide Opensource实现终端监控、终端调度、信息发布等功能.     

一种移动多点远程无线视频监控系统的设计

提出了一种移动多点远程无线视频监控系统的设计方法.分析了该移动多点远程无线视频监控系统及其跟踪采集运动物体状况方面的特点;提出了系统的整体构架及系统终端的整体设计;对移动多点远程无线视频监控系统的关键技术的实现进行了阐述.最后给出了该系统的应用定位.     

基于3G无线网络的多路视频监控系统

通过分析现阶段3G无线网络传输的特点、无线视频监控系统的工作原理和技术难点, 提出并设计了一种多路无线视频监控系统的设计方案. 该方案不仅具有六路视频通道的无线视频监控功能, 同时还实现了六路视频数据的网络监控和网络保存功能等.     

基于WMN的无线视频监控系统的设计

结合无线Mesh网络(WMN)的技术特性和网络视频监控的新要求,提出了一种基于WMN的视频监控系统设计方案。监控终端通过摄像机和基于嵌入式Linux平台的视频服务器完成视频采集和压缩,利用WMN进行实时传输,监控中心在Mesh网络的覆盖范围内通过因特网进行视频数据接收,实现无线视频监控。实验测试结果表明,该系统播放流畅、实时性好,在无线视频监控中具有广泛的应用前景。     

基于单片DSP的嵌入式视频监控终端及系统的实现

针对大范围分布、多监控点的视频监控需求,设计和实现了基于宽带网的具有分布式体系结构的监控系统,该系统允许视频监控终端、监控中心客户机和监控服务器在大范围内灵活、方便地组网.同时,介绍基于单片DSP的嵌入式视频监控终端的设计和实现中的关键技术,包括监控终端的软、硬件结构以及MPEG-4视频编码算法在DSP上实时实现的算法级和代码级优化.该监控系统已在实际中应用.     

基于Wi-Fi和RTP/RTCP协议的无线视频监控系统设计

传统的视频监控系统一般都是采用有线方式传输,根据目前的无线视频监控需求,采用无线Wi-Fi技术设计实现了一套低成本,高可靠性的视频监控系统。系统采用ARM11处理器S3C6410核心,选用Linux操作系统,以H.264协议进行压缩编码,采用RTP/HTCP协议进行视频传输。用USB摄像头采集数据,压缩编码后经Wi-Fi传输到网络终端。终端通过Web方式登入摄像头管理系统,接收视频信号并解码播放。测试表明该系统可靠性好,视频清晰,设计合理。     

视频采集与编码技术在视频监控终端中的应用

考虑到开发的难易程度、生产成本和软件升级等因素,本文介绍了一种基于ARM处理器和嵌入式Linux操作系统的无线视频监控终端的设计和实现方法;分析了在嵌入式Linux操作系统下基于V4L的视频采集的新思路与基于MPEG-4的视频编码的优点,阐述了整个终端系统开发的难点及相应的解决方案;给出了无线监控终端的实现方案、视频采...     

基于Hi3515的嵌入式视频监控终端设计

提出了一种以海思Hi3515为核心、以嵌入式Linux为操作系统的嵌入式视频监控终端的设计方案.针对移动环境下需要传输音视频和车辆定位等信息的需求,使用3G网络进行数据传输.本系统使用NPV1108进行音/视频采集,在Hi3515中进行编码,并将数据存储到硬盘或者传输到远程服务器,同时使用HoluxM-89模块接收GPS消息,实现定位功能.测试表明,该视频监控终端可以很好地实现音/视频采集、存储、编码和无线传输以及GPS定位和报警等功能.     

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     

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.