Recipe for a Science Happening: 1 Volunteer Engineer, 1 Teacher, 30 Youngsters-Blend in Lots of Love and a Pinch of Humor

Engineers can play a special role in society. Working in industry, the corporation's sphere of influence can act as a lever for a contributing professional individual. Hence, the engineer is able to exert a greater force on the world than most other people. With technology carrying us away at a rapid (and some think devastating) rate, the need for socially responsible professional people is becoming more crucial. Many believe that members of minority groups can make an effective contribution to the modern social engineering concerns that confront us. There are several programs currently underway by colleges, government, and industries to increase the flow of minorities into the engineering profession. This article discusses two programs whose purpose is to promote an interest for engineering and science in youngsters. First, the Science Consultant Program-sponsored by Xerox Corporation. The SCP is a volunteer program that gives elementary school students a first-hand look at science by bringing scientists, technicians, and engineers to the inner-city classrooms. Second, the Junior Engineering Technical Society which works through school sponsored clubs and projects to provide engineering oriented career guidance to high school students.     

浅谈大学英语课堂中的多媒体计算机辅助教学

针对传统大学英语教学模式下的课堂环境，分析了多媒体计算机辅助大学英语教学的特点和优势．阐明了多媒体计算机辅助教学是重塑和改善大学英语课堂环境的客观要求和有效途径，同时也指出了实际教学过程中应该注意的问题。     

重庆市部分中小学校教室光环境调查与分析

据2004年全国学生体质健康调研结果表明,我国中小学学生的近视率同2000年相比均有不同程度的上升,大城市的学生近视患病率显著提高。本文对重庆市部分中小学校教室进行光环境现状的调查,并根据国家现行的相关标准,对教室的光环境现状进行分析。结果表明,重庆市学校教室采光和黑板照明问题十分严重,人工照明也不理想,与国家新标准有一定差距。针对这一现状,本文针对部分问题提出了建议和解决对策。     

一种基于图像的智能控制教室照明系统

针对视频监控里的静态图像信息的特点,设计了一种基于图像的智能照明控制系统,给出了系统的控制原理和方法。该系统可应用于学校图书馆、教室等需要智能照明的场所。仿真结果表明,该方法在智能照明方面具有可行性。     

The neighbourhood school in the global village

Access to the Internet is transforming classrooms in many ways. Students from anywhere can directly access people and information resources from anywhere else. Innovative educational materials can quickly become available throughout the world, not just throughout a school. Students can find up-to-date information and personal mentors without leaving their desks. Teachers can develop and participate in professional peer groups nationally, even internationally. We are exploring a local neighborhood view of educational networks. We describe three facets of this endeavor. First, we directly and pervasively involve community groups, for example, public school teachers and senior citizens, in defining and developing technology to address their needs and to facilitate their goals, Second, we seek to leverage and develop neighborhood resources by facilitating collaboration throughout the community via computer mediated communication (email, chat, shared whiteboards and notebooks, video conferencing). Third, we view the entire community as the learning community, and view local schools as a forever-unfinished community project (D. Schuler, 1996). Our project leverages the networking infrastructure of the Blacksburg Electronic Village (BEV), an advanced community network located in Blacksburg, VA, a college town of about 36000 in rural Appalachia (USA)     

中小学教室光环境的模糊综合评价

目前,我国中小学生视力不良发生率居高不下,中小学教室光环境亟待改善,而国内对于教室光环境的综合评价尚无统一的方法。本文运用模糊综合评价法建立了中小学教室光环境综合评价指标体系,并利用Delphi法和改进的层次分析法确定了各指标的相对权重。实际应用结果表明：该方法解决了传统检验只能得出合格与否结论的问题,对光环境的综合评价具有一定的指导意义。     

一种集成化教室空气感知系统的设计与实现

针对高密度人群教室空气质量差导致学生学习效率低和损害学生身心健康的问题,设计了一种集成化的教室空气感知系统.首先,阐述了集成化教室空气感知系统的整体设计;其次,基于模块化设计方法,分别详细设计了感知PM2.5、PM10、甲醛浓度、挥发性有机物、二氧化碳浓度等数据的采集模块,主控制模块、电源模块与液晶显示模块等硬件电路,...     

一线总线指令卡与一线测量控制组件

乙酰总线指令卡在一线总线技术中是非常重要的角色，随着一线测量、控制组件的迅速发展、丰富，一线总线指令卡将愈发显示其强大的作用。     

PLC在脱硫剂白灰浆液配制的应用

可编程控制器是以微处理器为核心,综合计算机技术、自动控制技术和网络通信技术而发展起来的一种新型工业自动控制装置。随着现代工业生产自动化水平的日益提高和微电子技术的飞速发展,PLC已经成为功能完备的自动化系统,是当代工业控制领域的支柱。西门子公司的小型一体化PLC其具有功能强大、使用方便、结构紧凑、配置灵活、体积小、重量...     

基于Nios Ⅱ软核的人脸定位系统设计

基于Nios Ⅱ软核的SOPC技术实施数字图像处理是当今的应用热点。本文依托于该技术应用于人脸图像定位系统,进行系统搭建,定位算法实现,软件编制。通过定制用户指令,应用成熟的人脸定位算法和使用友晶科技的DE-2高性能图像处理开发平台,显著的提高了系统的实时性和正确识别率,完成了系统硬件平台搭建、人脸定位算法的软硬件实现和开放IP核的应用的设计目的,也为后续的功能完善,性能提高及人脸识别提供了必要的理论与实践基础。     

北京市部分学校教室采光照明现状分析

近年来我国学生视力不良检出率居高不下,并且呈现明显上升趋势,已经到了极为严重的程度.学校教室的采光照明问题是保护学生视力健康的重要部分.2004年我国重新修订了国家标准〈建筑照明设计标准〉GB50034-2004.本文对北京市部分大中小学校进行采光照明的调查分析,结果显示,北京市学校教室采光照明问题十分严重,与国家标准要求差距很大,在被调查的39间教室中,窗地面积比达标率为20.5%,课桌面照度达标率为25.6%,黑板照度达标率为零.     

A cost-effective approach for the development of an integratedPC-PLC-robot system for industrial engineering education

Advanced manufacturing technology (AMT) instruction is and is likely to remain an important component of the industrial engineering education curriculum. As new manufacturing technologies become available and as existing manufacturing technologies become more integrated, industrial engineering departments must continuously develop their laboratory resources in order to provide their students with effective instruction. While financially limited departments cannot acquire state-of-the-art manufacturing equipment, they can provide improved hands-on AMT integration instruction without major capital investment. By developing an interface box between existing LabVolt PLC trainers and Microbot TeachMover robots, the industrial engineering department at a major Northeastern US university was able to provide its students with improved AMT integration instruction     

基于多单片机的模型直升机机载测控系统设计

遥控模型直升机在军事侦察领域具有广泛用途,其控制系统要求可靠性高、便携性好。多单片机协调综合使用A/D采集、串行口数据读写、PWM信号读取与产生、中断与定时编程等一系列技术,完成多传感器数据采集与执行器控制任务,实现模型直升机机载测控功能。克服嵌入式系统开发中存在的体积重量缺陷,具有较好的便携性和机动性。在平台试验中,系统能够根据测量数据做出正确的控制决策,功能满足遥控模型直升机测控系统要求。     

家庭自动化中电力线载波通信系统的设计

随着电力线通信技术标准规范的日益完善及其芯片研发的不断深入，电力线载波通信技术在家庭自动化控制中的应用正成为关注和研究的热点。文中介绍了一种以SC1128扩频芯片为基础的电力线载波通信系统的设计。实验表明该系统在家庭自动化控制中有可靠性高、易组网、易扩展等优点。     

基于高频电压信号注入凸极PMSM无传感器控制的仿真研究

永磁同步电机以其体积小、效率高、可靠性好以及对环境的适应性强等诸多优点,在各种高性能驱动系统中得到广泛应用.无传感器永磁同步电机控制技术具有成本低、体积小,可靠性高等优点,是当前永磁同步电机控制技术领域的研究热点之一.该文对基于高频信号注入法进行永磁同步电机无传感器控制技术的基本原理进行论述,并采用滤波方法得到转子位置...     

基于STM32的远程定位与监控终端的设计

根据当今安防的实际需求,设计了一套以ARM为平台,结合GPS技术、GPRS技术和图像采集技术的远程定位与监控终端。当检测到外界突发信号,比如强冲击或者人工按钮被按下,终端将采集到的GPS定位信息和图像信息通过GPRS网络实时传输到监控中心,同时发送报警信息到用户手机,监控中心也能通过发送查询指令,实时获取定位数据和图像信息。该系统具有低成本、高性能、高可靠性等优点,实现了智能报警、远程定位与监控功能。实验运行结果表明,系统定位和监控功能满足实际使用要求。     

研究天然采光质量方法论初探(英文)

尽管高品质的天然采光可以提高居住环境的舒适度,益于居住者的身心健康,但人们很少了解居住者对天然采光的需求与天然采光之间的量的关系。笔者通过回顾性研究,在结合建筑科学、社会科学、心理学研究方法的基础上,探索一种利用物理实地测量、问卷调查、数理统计为一体的综合研究模式,来建立天然采光的质与量之间的关系,并以此评估建筑天然采光的质量。本文以研究香港中学天然采光质量为例,评估该研究模式的可行性。研究结果证实:此研究模式可以较理想的评估学校建筑的自然采光质量问题。     

Educational and Training Technology in the United Kingdom

The growing interest in the United Kingdom in educational technology is reflected in the creation of a number of new organizations. The present interest in some devices is outlined; the author describes the rise and fall of programmed instruction, the reasons why early hopes were not realized, and the lessons to be derived. An educational television service and the Open University, both the world's largest systems of their kind, are described. Many teachers are reluctant to accept educational technology; this might be overcome by introducing teachers to the technique in a teaching situation, through local "workshops," the use of audiovisual aids in selected educational establishments, and instruction in the management of equipment. This will require industry's cooperation.     

光电技术在指示仪表自动化测量中的应用

重点介绍了电测量指示仪表实现全自动测量的一种方法,提出了可以提高CCD测量分辨率的原理和方案。通过光电技术、计算机模式识别技术以及标准源技术的综合运用,实现了指示仪表的全自动测量。