基于nRF401的移动物体范围监控系统研究

本系统由无线收发模块（nRF4C1）、单片机、无线modem组成。通过软硬件结合,解决了对多个移动物体监测的实时性、保密性、抗干扰性、物体区分、范围限定、低功耗、方便可嵌入性等问题。设计了一种对小范围内移动物体范围监测系统,并通过手机接收监测中心的报警短消息以及对监测中心发送控制指令,实现对多个移动物体小范围内的监测报警和远程控制,具有一定的实用价值。     

基于nRF401的移动物体范围短消息监控

设计了一种小范围移动物体的范围监测系统，它由无线收发模块（nRF401）、单片机、无线modem组成。通过手机接收监测中心的报警短消息以及对监测中心发送控制指令，实现对小范围内多个移动物体的监测报警和远程控制。利用软硬件结合，解决了对多个移动物体监测的实时性、保密性、抗干扰性、物体区分、范围限定、低功耗、方便可嵌入性等问题。     

基于GSM短消息的温度报警系统研究

本文所论述的是基于GSM短消息的温度报警系统,可以用于实时监测调速系统的温度,而且可以在温度超过设定值时通过短消息模块进行无线报警。利用多个温度传感器的传输温度值,可以解决了靠运行人员手工检查、测量电机的温度值的缺点,能够正确区分和确定系统中的温度值并进行报警,这对快速排除故障,保证机器安全可靠地运行具有重要意义。     

污水重金属监测与移动预警系统

针对企业污水排放重金属监测分布范围广、环境恶劣的特点,设计了基于无线传感网络、J 2 M E技术的污水重金属监测与移动预警系统。在污染水区部署传感器节点,通过ZigBee无线传感网络传输采集数据,经GPRS网络到达智能手机;同时数据经由无线基站和Internet传送至监测中心,手机客户端既可从GPRS网络获取超限报警数据,也可从监测中心获取重金属污染动态分析数据,实现了实时监测和移动预警。     

嵌入式公路健康监测传感器系统设计

针对公路健康监测系统监测参数多、监测范围广、实时性要求高及有线监测布线困难且易损坏等特点,设计了一种无线传输的嵌入式公路健康监测系统.该系统采用三层式结构设计,由数据采集节点、中继节点及监测中心组成;利用多传感器集成技术、单片机智能控制技术及组态王控制系统开发技术等进行软硬件构建,通过无线射频技术和数据传输装置(DTU)模块进行层间通信,最终实现对路基内部温度、湿度、压力、应变及加速度信息的实时采集与处理.初步实验结果表明:系统在4km范围内工作稳定可靠,可以满足中远距离公路监测传输需要.     

基于CC2510的输液监测无线终端的软件设计

无线输液监测系统可用于医院静脉输液治疗室的辅助监控.本文讨论了基于CC2510无线输液监测系统的一般结构,给出了系统中无线终端的软件设计过程.无线终端程序包括滴速检测、报警判断、数据打包、数据发送四方面内容.测试表明该无线终端检测准确、报警及时、数据传送稳定,取得了满意的工作效果.     

基于物联网和ZigBee的公寓安全智能管理系统设计

提出利用物联网技术和ZigBee无线传输网络构建公寓安全监测、控制与管理系统.利用数据采集终端设备实时接收来自多个传感器的安全信息并进行分析和报警判别;所有报警信息通过ZigBee无线传感网络进行分层收集和汇总后送给ZigBee总协调器;网关控制器将数据完成ZigBee和GPRS网络协议转换后,由GPRS模块发送到远端的上位机监测中心进行存储与显示.实验证明,该系统可以实现对多路传感信息的准确识别和报警信息的无线传输.     

基于GSM短消息的水情实时监测系统设计

针对现有水情监测系统采用专用网络,投资成本大、维护费用高、网络覆盖范围有限的现状,提出了基于GSM短消息的水情实时监测系统.该系统由数据采集子系统和监测中心子系统组成,利用水位传感器实时监测水情的变化,如果水情变化,则由数据采集子系统的GSM MODEM以短消息的方式将当前的实时水情数据发送到水情监测中心和相关管理人员手机,以便及时处理.     

基于GPRS的油井水系统的远程监测技术的研究

油井水系统运行状态的远程监测长期以来都是测井人员追求的目标.用卫星无线传输数据成本太高,而GPRS的低成本和低技术门槛使得油井水系统运行状态的远程监测成为可能.本文构建了一个基于GPRS的油井水系统的远程监测系统.它利用现场分散采集,通过GPRS通信,最后监测中心计算机集中接收处理并在Web服务器进行网上数据发布.该系统可方便地对油井水系统运行情况进行实时监测,且稳定性高,具有广阔的实用价值和推广意义.     

基于ADSL的远程污水处理自动监测监控系统的开发

介绍了远程污水处理自动监测监控系统,由数据采集及污水处理控制执行装置、网络通信接口装置、监测中心等组成.控制器实现实时数据采集、处理和控制,使企业生产污水达标排放,通过网络通信接口装置将实时数据传输到监测中心,监测中心管理软件实现现场仿真、数据存储、分析、报警等.系统采用ADSL网络接入方式,网络数据传输的经济性、安全性和实时性得到提高.     

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.