基于B/S架构的煤矿灾害智能综合防治系统研究

文章主要研究如何利用浏览器/服务器(Browser/Server,B/S)架构构建煤矿灾害智能综合防治系统。先将煤矿灾害的数据收集、处理、分析和决策等各个环节放置在云端服务器,然后把应用程序部署到用户设备,从而实现对煤矿灾害的实时监测和预警功能。为了提升系统的安全性和可靠性,可以采取多种措施如加密通信、备份数据等。设计系统可以有效地解决现有问题,因此具有广阔的应用前景。     

一种食用菌大棚环境参数测控系统设计

介绍了一种食用菌大棚环境参数测控系统的设计过程,该系统由多个结构相同的检测终端和一个测控主机组成,检测终端对大棚内的光照强度、环境温湿度、CO_2浓度、培养基水分含量等进行实时监测,并将检测数据通过ZigBee无线网络送往测控主机,测控主机具有阈值设置,数据显示,异常状态语音警告、互联网云平台自动接入等功能,并能在参数异常时启动调节设备,实施相应的自动调控功能,并具有手机APP的在线监测与调控功能。实验测试验证了设计方案的合理性和可行性。     

基于3G网络的分布式粉尘监测系统

为解决传统粉尘监测设备的监测点少、维护成本高等问题,基于3G网络,提出一种分布式粉尘浓度监测系统。采用依据微电荷监测原理实现的粉尘检测器作为前端探头,将被测区域内的粉尘量转化为4 m A~20 m A的电流信号。通过高精度模数转换器将电流信号转换成数字信号,再利用现场可编程门阵列模块将采集的粉尘浓度值、继电器开关信号等数据组成协议帧,通过3G网络将数据传送至数据中心。应用结果表明,该系统能够实现粉尘浓度实时显示、采集数据保存及历史数据回放功能,具有监测精度高、维护成本低、操作安全等特点。     

基于B/S架构的家居环境远程监测系统设计与实现

伴随着物联网技术的快速发展,传感器网络、无线通信、嵌入式智能设备和大数据在智能家居上的结合正在成为一个不可逆转的趋势。针对传统C/S(Client/Server)架构环境监测数据远程监测困难、系统安装复杂、系统平台要求较高、后期维护成本高等缺点,提出了一种基于B/S(Browser/Server)架构的家居环境无线远程监测方案,设计了一套用于多个环境参数实时监测并通过Zig Bee低功耗局域网协议进行无线传输的远程家居环境监测系统。用户可以从移动端或PC端通过网页直接查看多个房间内的温度、湿度、PM2.5浓度、甲醛浓度、CO浓度等空气状态信息。该系统设计功耗低、成本低、结构简单、安装方便。     

ADS-B数据质量监测与雷达数据融合平台的研制

研制一套基于空管广播式自动相关监视系统ADS-B、雷达等多种监3视设备输出数据的质量监测和融合系统。从监视设备输出接口采集数据,采用C++语音实现协议解析、数据处理、及综合监视和回放功能。通过监测民航二所ADS-B信号证实该系统对监视设备输出数据能够提供有效的监测、解码并完成错误统计,提高了对监视设备输出数据质量的监测能力。     

《煤矿安全规程》监控、通信与监视修订意见

提出了《煤矿安全规程》修订应增加矿井移动通信、广播通信、视频监视、人员定位、煤炭产量监测、矿井火灾监控、矿山压力监测、水文监测、远程监控等内容。提出了严禁矿井监控系统与视频监视系统共用信道;矿井有线调度通信系统的电缆必须专用;主干网络应采用具有冗余功能的千兆或千兆以上矿用以太光网络;矿井移动设备和无线接入等应优选WiFi、ZigBee、4G等技术。提出了煤矿安全监控系统和矿井有线调度通信系统等的关键光缆和电缆应分设两条,从不同的井筒或一个井筒的不同位置进入井下;系统光缆和电缆应具有防护措施;底鼓不严重的矿井,系统光缆和电缆应埋入巷道底板与巷帮夹角处。提出了煤矿安全监控系统应具有主要通风机监控、瓦斯抽采监控功能;具有呼吸尘浓度、总粉尘浓度实时在线监测功能;具有风向监测功能;具有瓦斯变化率等分析功能;具有煤与瓦斯突出报警功能;高瓦斯和煤与瓦斯突出矿井应选用全量程和高低浓度甲烷传感器,优选激光或红外甲烷传感器;采用载体催化元件的甲烷传感器、便携式甲烷检测报警仪等甲烷检测设备,必须定期使用校准气样和空气气样调校,每15d至少调校1次;甲烷超限断电功能每15d至少测试1次;高瓦斯和煤(岩)与瓦斯突出矿井的采煤工作面,必须在上隅角设置甲烷传感器,报警浓度为1.0%CH4,断电浓度为1.5%CH4,复电浓度为1.0%CH4等。     

《煤矿安全规程》监控、通信与监视修订意见

提出了《煤矿安全规程》修订应增加矿井移动通信、广播通信、视频监视、人员定位、煤炭产量监测、矿井火灾监控、矿山压力监测、水文监测、远程监控等内容。提出了严禁矿井监控系统与视频监视系统共用信道;矿井有线调度通信系统的电缆必须专用;主干网络应采用具有冗余功能的千兆或千兆以上矿用以太光网络;矿井移动设备和无线接入等应优选WiFi、ZigBee、4G等技术。提出了煤矿安全监控系统和矿井有线调度通信系统等的关键光缆和电缆应分设两条,从不同的井筒或一个井筒的不同位置进入井下;系统光缆和电缆应具有防护措施;底鼓不严重的矿井,系统光缆和电缆应埋入巷道底板与巷帮夹角处。提出了煤矿安全监控系统应具有主要通风机监控、瓦斯抽采监控功能;具有呼吸尘浓度、总粉尘浓度实时在线监测功能;具有风向监测功能;具有瓦斯变化率等分析功能;具有煤与瓦斯突出报警功能;高瓦斯和煤与瓦斯突出矿井应选用全量程和高低浓度甲烷传感器,优选激光或红外甲烷传感器;采用载体催化元件的甲烷传感器、便携式甲烷检测报警仪等甲烷检测设备,必须定期使用校准气样和空气气样调校,每15d至少调校1次;甲烷超限断电功能每15d至少测试1次;高瓦斯和煤(岩)与瓦斯突出矿井的采煤工作面,必须在上隅角设置甲烷传感器,报警浓度为1.0%CH4,断电浓度为1.5%CH4,复电浓度为1.0%CH4等。     

便携式谐波监测系统设计

为实现对外场设备中电源谐波的快速准确监测,提出了一种基于Labwindows/CVI的通用谐波监测系统设计方案。系统采用便携式工控机作为硬件平台,软件采用Labwindows/CVI软件作为开发平台,用来实现数据的采集、分析与处理等功能,并将小波补偿的加窗插值F F T算法用于进行谐波分析,提高了谐波分析精度。     

环境监测数据采集系统设计

随着经济和社会的快速发展,环境大气污染尤其是雾霾和有毒气体对人体的危害越来越大,于是对环境信息如PM2.5、温湿度、各种气体浓度等的监控要求愈来愈高.因此,研发和设计一种功能多样、可靠性高、便携性好的环境监测数据采集系统具有十分重要的意义.本文运用传感器及嵌入式技术设计了一种新型便携式综合环境监测数据采集系统.实验结果和误差分析表明该数据采集系统可实现实时数据采集和显示功能并保证系统数据的可信度,也可应用于空气质量监测、室内环境监测、煤气、天然气及有毒气体监测等场景.     

目标诸元图形化处理方法研究

利用TeeChart Pro工具开发出数据图像分析系统,具有实时数据监测和事后数据预处理的功能。通过MSComm控件实现串口通信以控制系统实时显示设备采集的数据来观测飞行器轨迹曲线,同时支持在界面上直接操作图像曲线以实现剔点功能,极大的方便了观测数据和修改数据。     

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.