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.     

基于无线传感器网络的微灌监控系统研究

根据农业灌溉中的实际需求,结合Zigbee无线传感器网络技术设计了一个由嵌入式测控终端和中央监控计算机组成的灌溉监控网络系统.首先对微灌系统进行了总体设计,给出了系统总体架构;其次设计开发了系统网络总节点和终端节点的软硬件;设计了终端监控软件及其操控平台,实现了对微灌的远程监控.并进行了系统实验,实验结果表明微灌监控系统满足农业灌溉需求,提高了农业灌溉的自动化水平.     

基于GPRS-Internet的城市路灯远程监控终端实现

本文介绍了基于GPRS-Internet的城市路灯远程监控系统组成、通信以及远程监控终端的软硬件实现.远程监控终端通过GPRS数据终端连接到GPRS-Internet,与监控中心进行远程通信,实现遥控、遥测和遥信的功能.     

基于GPRS—Internet的城市路灯远程监控实现

本文介绍了基于GPRS-Internet的城市路灯远程监控系统组成、通信以及远程监控终端的软硬件实现.远程监控终端通过GPRS数据终端连接到GPRS-Internet,与监控中心进行远程通信,实现遥控、遥测和遥信的功能.     

公交车辆的监控和调度系统

开发了一个简易多功能的公交车辆监控和调度系统,系统由多功能车载终端和监控调度软件组成;车载终端由超低功耗单片机MSP430F1611、GPS、GPRS和自动计数等模块组成,该终端以最低的硬件资源实现了远程监控、自动报站和超速报警等多项功能;监控调度软件结合GIS平台和智能调度管理,实现对车辆实时动态地监控和智能调度;TCP/IP通讯协议保证了数据交换的实时性和准确性;系统测试证明了该系统的可靠性和稳定性.     

基于μC/OS-Ⅱ的基站监控终端的设计与实现

为提高通信基站监控终端的可靠性和事件处理能力,本文介绍采用16位RISC架构嵌入式微处理器R8800实现基站监控终端的设计.利用Paradigm C++5.1集成环境编写监控终端控制程序,实现μC/OS-Ⅱ在R8800上的移植.通过实装调试,设计的任务程序能在硬件环境和操作系统下稳定工作,实现了监控终端对环境模拟量和开关量信息的采集,对智能电源、空调设备和通风系统的通信与控制,与区域监控中心进行远程通信.     

基于无线传感网络的环境监控系统

为了实现对环境系统的动态远程监控,设计了一种基于Zigbee的无线传感网络监控系统.Zigbee无线数传终端模块通过内置的单片机系统,实现了不同传感器的接口协议,并对传感器数据进行了实时读取、编码与发送;系统中的协调器实现对数据包的接收、解码、验证并将正确的数据转发数据至服务器;无线传感网络中引入了ZStack协议,从而实现了对无线终端与协调器节点的动态增删;监控终端分为桌面与移动端,通过无线网络访问服务器中存储的数据,实现对环境系统的远程实时监控.     

基于Windows CE.NET的消防监控终端

从城市火灾自动报警远程监控管理网络系统的需求出发,设计并实现了基于WindowsCE.NET的消防监控终端。该文对其工作原理、硬件构成和软件设计进行了介绍。该监控终端实现了火灾自动报警系统和监控管理中心之间数据的远程通信,对入网的火灾自动报警系统实现了24小时实时监控,有效解决了目前消防监控领域存在的问题。对其它远程数据传输或无人值守系统有一定的参考价值。     

基于CAN总线的煤矿安全分布式监控系统

本文针对煤矿监测系统存在网络瓶颈、采集终端不兼容的不足,研究了基于CAN总线的煤矿安全分布式监控系统,根据矿井的特点设计了通用智能环境监控终端和机电设备运行状态监控终端,并通过CAN总线实现多节点高速、高可靠性的网络互联,对煤矿环境安全参数和设备运行状态进行实时监控,各监控终端可根据优先级别自主通讯.主机对全局参数进行信息融合、综合分析与诊断及预警连锁及辅助决策.     

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。     

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.