基于多传感器的温室环境监测系统研究

对农作物温室环境数据进行远程监控,是促进温室作物产业化、智能化和自动化的必然趋势。文章首先构建温室环境监测系统的基础框架,以光敏传感器、温湿度传感器等多传感器网络为基础,在底层通过ZigBee无线传感网收集和传输环境数据,并将数据返回给节点;其次,节点将数据发送至上位机;最后,由上位机图形界面实时可视化显示监测数据。重点探讨温室环境监测系统软硬件的总体设计并提出了具体的技术思想与方法。     

基于CAN总线和GPRS的温室大棚监控系统设计

针对大规模、大空间温室大棚的监控管理不便、采集数据不及时等问题,设计了一种可以多点采集数据,并可以远程监控的温室大棚监控系统.本系统主要由数据检测节点、CAN总线和GPRS通信网络、上位机监控软件组成,数据检测节点用于检测温室大棚环境数据,环境数据通过CAN总线和GPRS通信网络上传给上位机;上位机监控软件用于数据的接收显示和管理,采用Visual Basic工具进行开发,并使用Access2010建立了数据库.本系统可以分布式采集多点环境数据,实现数据远程传送,并自动调节环境参数,适于专业大户、合作农场使用.     

基于ZigBee的温室环境监测系统的设计

针对现有温室环境监测系统存在的不足,设计了一种基于ZigBee无线传感器网络的监测系统,通过软硬件相结合实现了温室环境数据的实时监测。硬件部分以CC2530为核心构建ZigBee无线传感器网络,包括传感器节点、汇聚节点;软件部分包括传感器节点的数据采集和发送、汇聚节点数据接收和发送、上位机监测管理3个部分。采用LabVIEW对上位机监测软件系统进行开发,人机交互界面友好。测试结果表明,该系统工作性能稳定,结构简单,布点灵活,可以实现温室内环境数据的无线监测。     

基于云数据处理的分布式光纤应变远程监测系统设计

针对现有的分布式光纤应变监测系统数据采集量大、存储空间有限、无法远程监控等问题,设计了基于云数据处理的分布式光纤应变远程监测系统。首先,基于ADO数据库访问技术设计了数据库访问编程接口,使上位机程序可通过该编程接口将数据传输至远程云数据库,解决了上位机存储空间有限的问题。其次,利用多线程机制设计了上位机程序多线程并发访问数据库模块,实现了数据实时高效的传输。最后,基于ORACLE设计了数据库系统方案,将数据库搭建在云服务器端,用于存储和分析MFC程序采集处理的监控数据和异常信息,实现了云数据的实时处理和远程监控。实验测试结果表明,上位机与云数据库之间的数据交互速度满足并发和实时监测的需求。     

温室环境远程智能监控系统的设计与实现

根据达州的气候条件,设计了以AT89C52单片机为核心的温室远程智能监控系统。该系统包括上位机和下位机两部分,下位机主要负责数据的采集、环境的监测与控制;上位机在温室环境远程智能监控系统的辅助下完成对栽培技术管理、环境监控、水肥管理、病虫害管理、查询统计、决策管理、参数配置、设备控制等工作。实验结果表明,该设计满足了对温室大棚环境远程智能控制的要求,达到了预期的效果。     

基于Zigbee的温室远程监控系统设计

针对国内现有温室建设情况,设计一种新型基于Zigbee无线传感器网络的温室远程监控系统。设计采用TI新一代Zigbee片上系统CC2530解决方案,实现了温室内光照、空气温湿度等环境因子的实时监测,喷淋电磁阀、通风风机的实时控制,实现了测控一体化。设计了现场与远程两类上位机并使用了通信协议转换模块,借助Internet实现了监控远程化。系统中还引入了网络摄像头,通过对它的控制,实现了温室内环境所见即所得的效果。通过实地运行测试,结果表明：系统运行可靠、采集灵敏、控制准确、视频流畅,满足系统设计和实际应用需求。     

基于无线传感网络的环境监测系统研究与实现

采用ZigBee无线通信模块组建ZigBee网络,终端节点的传感器采集温室中的温湿度数据,使用51单片机对数据进行处理,数据经过无线网络中的若干路由节点传输至协调器,协调器通过串口将数据传输给上位机。本文设计并实现基于传感网络的温室监测系统,提供一种稳定性高、成本小且实用的环境监测解决方案。     

基于物联网的温室大棚监控系统的设计

随着农业技术不断的进步,农业大棚越来越多,对大棚的管理和监控的要求也越来越高。本设计采用Zig Bee无线传输技术设计一种基于物联网的温室大棚监控系统,该系统分为数据采集模块、终端节点、协调器节点和上位机四部分,可实现对大棚内湿度、温度、光照强度、二氧化碳浓度等参数的远程实时监测,当环境参数异常时,系统能够自动报警。实验表明,该系统能有效监测温室大棚的环境参数,且实时性强,整体性能良好。     

基于多传感器的温室环境监测系统设计与实现

由于兰花对生长环境要求较高,温室内温湿度、光照强度均会对兰花的生长、繁殖造成严重影响。为了满足和调节兰花的生长环境,文中开发了一套基于多传感器的温室环境监测系统。首先,利用温湿度传感器、光敏传感器与ZigBee协调器进行组网,编写传感器的数据采集、数据传输代码;其次,端节点接收到协调器指令后分别解析温湿度、光敏数据,并返回数据给协调器节点,协调器节点再将数据发送至上位机;最后,由上位机图形界面实时显示监测数据。测试结果表明,该监测系统能够通过温湿度传感器和光敏传感器实时监测温室环境,并将监测数据以曲线形式在上位机实时显示。     

基于WIFI的农业物联网温室大棚环境监测系统的设计

针对现代农业温室大棚环境监测中存在的问题,设计了基于WIFI技术的农业物联网温室大棚环境监测系统。该系统由监控中心、WIFI基站、环境采集节点与视频监控构成。环境采集节点以STM32F作为主控器,采集温室大棚内光照度、环境温湿度、土壤温湿度等信息;视频监控采用有线与无线结合的方式;所得环境数据通过WIFI无线网络及光纤传回监控中心。设计了基于B/S架构的上位软件和基于C/S架构的移动终端环境监测软件来实现环境的监测与控制的下达。现场应用结果表明,所设计的环境监测系统网络结构简单、可靠性强、性能稳定。     

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.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.