基于快速响应湿度传感器的无线呼吸检测系统

呼吸功能的实时检测对有呼吸功能障碍的人群十分重要.基于纳米材料湿度传感器和Zig Bee无线网络技术设计了一种呼吸检测系统,该系统由四部分组成:湿度传感器探头、数据采集节点、数据接收节点、基于VC++的MFC平台开发的呼吸功能检测软件.系统实现了呼吸频率记录、呼吸暂停报警、呼吸信号波形实时显示等功能.实验对几位志愿者进行呼吸功能检测,验证了系统的有效性.呼吸检测系统具有响应和恢复快、能够检测急促呼吸、受外界干扰小、无线检测、携带性强等特点.     

基于多传感器融合技术的模糊舒适度传感器系统

阐述了一种基于多传感器融合技术的模糊舒适度传感器的设计,该系统由一级检测系统和二级融合系统两部分组成。一级检测系统主要包括温度、湿度和烟尘检测,二级融合系统主要对一级检测系统提供的基础数据进行融合处理;该系统能实时检测室内环境舒适度综合状况,从而给控制系统提供相应的控制依据。介绍了系统的组成原理、传感器选择、系统功能、结构设计等问题。     

基于6LoWPAN的森林火灾监控系统设计

为了解决常规森林火灾监测方法具有的成本高、维护困难和不能实时动态采集信息的缺陷,设计了一个基于6LoWPAN的森林火灾监控系统;首先,对森林监控系统的功能和体系框架进行了描述,将整个系统分为6LoWPAN无线传感器网络、Sink节点(网关节点)、3G网络、Internet、监控中心和手机终端;然后,对传感器节点和Sink节点的硬件进行了描述,同时将传感器节点和Sink节点的软件功能划分为硬件抽象层、精简UDP/IPv6协议层和应用层,同时采用贝叶斯概率公式对各传感器采集的数据进行融合决策,获得最终的融合结果;在野外环境中测试,实验结果表明,文中方法能高效、准确地对森林火灾的温度、湿度和烟雾进行实时动态监控,为森林火灾事故的避免和减少提供了一种实时有效的方式。     

基于Zigbee的智能农业灌溉系统

为克服传统粗放型农业灌溉系统浪费水资源、不能精确控制灌溉水量等问题,设计了一种基于Zigbee的智能农业灌溉系统。该系统基于Zigbee协议构建的无线传感器网络,实现土壤湿度数据的实时采集与灌溉水量的智能控制。传感器节点通过湿度传感器,将土壤湿度信息采集上报到服务器端。当传感器节点发现土壤湿度过低,自动通过继电器模块控制灌溉水阀。用户也可通过Web页面远端控制灌溉水阀,实现按需灌溉。系统实现了智能灌溉功能,提高了农业灌溉效率。     

基于ZigBee的森林防火系统设计

基于ZigBee无线传感器网络技术,设计了森林防火系统.系统实时采集监测区域的温度、湿度和烟雾浓度等数据,并监测及有效控制森林火情.本文介绍了ZigBee技术,阐述了系统的总体设计,硬件和软计实现方法.通过试验,节点的灵敏度和网络传输达到了理想效果.     

基于物联网的智能灌溉系统

现代农业领域中,通过使用各种传感器和不同的算法实现灌溉系统的自动化,使灌溉过程完全自主.设计了基于物联网的智能灌溉系统,利用传感器获取温度、湿度等数据,通过节点MCU处理并上传云端服务器进行储存,使用应用程序Blynk来实时监测数据,应用机器学习算法对实时传感器数据进行分类,通过决策树算法在脚本中实现.     

基于Zig Bee协议的温度湿度无线传感器网络

阐述了一种温度湿度智能数据采集的无线传感器网络,介绍了传感器节点的软件与硬件设计.该系统基于Zig Bee无线通信协议设计,克服了有线传感器网络的局限性,避免了其他无线通信技术的高功耗的缺点,节点成本低、网络容量大、生存周期长.实验结果表明:温度测量精度为1℃,湿度精度为3%RH,可以广泛用于环境检测.     

基于WSN的实验室环境远程监测系统

针对实验室设备众多,安全防护要求严格的特点,设计了一种基于WSN(无线传感器网络)的实验室远程监测系统。在实验室内部使用短距离无线通信技术ZigBee建立无线传感网络,使用CC2430模块作为检测节点,对实验室温度、湿度、烟雾等参数进行全面、实时的检测,实验室环境数据经协调器由GPRS节点将数据发送给用户,实现实验室远程监控。测试结果表明,系统具有建设成本低,运行可靠等优点。     

基于无线传输的粮仓多参数综合监测系统设计

针对目前粮仓监测系统存在的布线困难、扩展性差和成本高的缺点,基于无线传输思想,给出了可以实时监测O2、CO2 温度、湿度等参数并越限报警的粮仓监测系统设计方案.该系统采用分布式网络结构,通过各传感器节点对O2、CO2温度、湿度数据进行采集和传送,将采集的数据送至单片机处理后,由ZigBee无线传输至服务器以对粮库环境进行监控.并且对于本系统的抗干扰问题做了分析,给出了相应的措施.     

基于Kinect的非接触式呼吸检测系统

利用Kinect的深度传感器功能,获取景深图像,并对图像进行信号处理和分析,检测人体的呼吸率和呼吸状态,从而实现非接触式呼吸检测.该系统免除了传统接触式呼吸检测仪安装和测试带来的不便,实现高效准确的实时呼吸监测.     

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.