基于单片机的家庭报警系统设计

本文设计了一种基于AT89C2051芯片为CPU的家用报警系统,以烟雾探测器、门磁报警器、燃气体探测器等传感器为节点,当收集到异常信息后,由无线网络节点送至报警主机,通过主机报告给预留电话,从而完成了家庭报警系统的硬件组成、软件设计、数据采集与通信策略以及主程序设计,实现对家庭的非法入侵、火灾、燃气泄漏等事故的报警保护。     

基于ZigBee的在线碱液浓度计

针对织物丝光及后处理工艺碱浓度检测过程中对监控系统实时性的要求,根据电化学原理,提出了基于ZigBee技术的碱浓度检测系统.系统选用TI公司基于ZigBee技术的CC2430芯片作为系统数据采集与传输、数据显示节点的控制器.设计并给出了碱浓度数据采集电路、主节点与数据显示电路原理图和程序流程.运行结果表明,该系统具有稳定可靠、抗干扰、体积小、成本低等特点,为化工及纺织等企业的碱浓度检测提供了一种新技术.     

基于CAN和模糊推理的一款地铁列车火灾报警系统的设计与仿真研究

针对传统火灾报警系统存在可靠性低、误报率高的问题,设计一套基于CAN总线和模糊推理的地铁列车火灾报警系统.使用分布式结构和冗余,进行系统总体方案设计.根据功能需求设计列车火灾报警控制器和火灾复合探测器.考虑多传感器数据融合,提出使用复合数字滤波法和模糊推理解决火灾检测准确率低的问题.仿真结果表明,使用多数据融合和模糊推理有效提高了火灾检测的准确性.     

基于单片机的智能火灾报警系统设计

本文针对一般场合的火灾情况,考虑到现有火灾报警系统的不足,设计了一种基于单片机的智能火灾报警系统。采用AT89C51系列单片机作为主控芯片,Pt100作为温度传感器,HIS-07作为烟雾传感器,同时考虑温度和烟雾浓度作为火灾检测指标完成了系统的硬件与软件设计。并且,根据火灾不同的发生阶段,采用"光信号报警"和"光信号+蜂鸣器报警"两种方式进行警报设计,增加了系统的准确性和灵敏性。     

基于ZigBee技术的仓储火灾报警系统设计

介绍了一种基于ZigBee技术的仓储火灾报警系统的设计方法,给出了硬件电路和软件流程.系统使用Chipcon公司的CC2430射频芯片和传感器组成无线传感器网络节点,用以实时对仓储的环境信息进行监控,通过监控中心综合后对火灾信号进行报警.系统具有功耗低、成本低、维护简单的特点.     

基于STM32与SN260的物联网数据采集与控制系统

介绍了一种基于ZigBee技术的物联网系统数据采集与控制系统．利用STM32单片机作为主控制器结合SN260无线射频zigBee网络处理器设计物联网系统的硬件节点,实现远程环境数据的采集与控制功能;并详细描述了该物联网系统的工作原理和系统设计．     

火灾报警与联动控制系统实验装置的设计

阐述了分布智能式火灾报警与联动系统实验装置的研究.该装置的火灾报警控制器基于单片机最小系统设计,改善了传统的火灾报警系统点对点的多线制结构模型,采用基于二总线技术的数字编码、数字信号脉冲信号巡检机制的多节点巡回检测,有效地提高系统的抗干扰能力、解决系统低功耗、远距离通讯的要求.由多个独立的区域控制器子系统和一个集中控制器组成基于CAN总线的分布式控制式系统结构,有效地免去单一控制器大量的信号处理负担,降低系统巡检周期、提高系统运行的灵活性、实时性、稳定性和可靠性.     

基于WSN的工作面液压支架监测系统的研究

针对目前工作面液压支架监测系统的现状,设计了一种基于CAN总线和无线传感器网络(WSN)的液压监测系统。该系统以ATmega 128L单片机和CC2420芯片为核心设计传感器节点,结合CAN控制器MCP2515设计Sink节点,给出了系统的硬件设计和软件流程。     

基于多传感器家居火灾报警系统的设计

针对人们对家居安全性方面越来越高的要求,设计了一款基于多传感器的家居火灾监测报警系统。本系统可通过手机端APP远程查看家居参数,如温度、烟雾浓度、湿度、CO气体浓度等信息,主控制器对多个传感器节点测量所得的多种参数进行数据融合判断。当气体浓度超标时,下位机进行现场的声音报警,启动排风扇做紧急处理;上位机(手机端)则进行手机振动与微信公众号消息推送提醒。本系统实现了家居火灾的监测、报警、智能控制等功能,采用多传感器采集,可靠性高。     

基于SD卡的低功耗多通道内记系统设计

给出一种应用于低功耗数据采集仪的SD卡设计方案,该方案选用高性能单片机C8051F020作为主控制器,采用SPI总线接口方式与SD卡相连,引入了FAT16文件系统来管理存储在SD卡上的数据。讨论了系统硬件接口和软件设计。     

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.