机场管制模拟练习设计方法初探

模拟机训练是空管实践教学最重要的组成部分,是提高空管学员管制技能最重要的手段。本文针对机场管制模拟练习设计,在分析国内外现状的基础上,提出了适应我国空管教学的模拟练习设计方法。     

采区风门自动化阻车系统

现行煤矿采区内风门的打开和闭合基本都靠人工操作,单轨吊机车在行驶过程中撞击风门的事件时有发生。实现风门和阻车器的连锁控制,可以提高采区内的工作效率,进而提高企业的经济效益。设计的采区风门自动化阻车系统具有车辆行驶方向识别,风门的遥控、自动和手动控制,风门和阻车器连锁控制功能。经过运行,整个系统能够正常运行。     

微格课堂观察及其对高等师范生教学技能培养的启示

课堂观察作为架设于课堂教学与教育研究之间的桥梁正受到越来越多的关注,它有助于执教者或观察者更好地解决教学实践难题,有助于促进高师教法改革,有助于实现师范生专业成长,所以被认为是师范生教学实践技能培养的有效途径之一。为此,高师院校应完善教育实践导向的课程结构,强化基于课堂观察的微格教学训练,并着力构建基于“临床”指导的实践教学模式。     

NO2与NO气体制备演示一体化微型实验探究

实验室制取NO2、NO的反应,由于其毒性,实验装置的改良备受关注,笔者进行了进一步的改进,旨在减少试剂用量、减轻尾气毒害,人人有机会动手实践,这一点符合绿色化学的发展理念。     

基于制造报文规范的单元式空调机远程控制(英文)

传统的单元式空调机都是本地控制运行的，但是现代信息技术的发展，要求单元式空调机能支持更多的功能．作为发展中的第一步，我们实现了一个基于制造报文规范的单元式空调机远程控制系统．制造报文规范是一个专为实设备的远程控制和监视而设计的ＯＳＩ应用层协议，它提供了操作人员在远程对单元式空调机的正常操作的功能．本系统（ 简称ＵＭＣＳ） 的实现使得制造报文规范的应用和单元式空调机的控制技术有了一个新的飞跃．     

Altitude and wind effects on long jump performance with particular reference to the world record established by Bob Beamon

An analysis of long jump performance, including both the approach and aerial phases, is applied to Bob Beamon's legendary leap at the Mexico City Olympic Games of 1968. It is shown that the combined effects of altitude and wind assistance yielded an increment in the length of the jump of about 31 cm, compared to a corresponding jump at sea level under still air conditions. The main factor is shown to be the increased sprinting speed attained under favourable conditions of wind and altitude.     

贮仓特殊部位的施工

贮仓的漏斗及贮仓群当采用现浇混凝土施工，采用空滑法。应做好支撑杆的加固工作。斗壁施工时比较困难，若采用分开施工法较简单，可连续施工，但必须做好施工缝的接槎工作。     

The impact of electric overhead radiant heating on the indoor environment of historic churches

The impact of electric overhead radiant heaters on the microclimate, air flows, transport and deposition of suspended particulate matter (SPM) was monitored between March 2004 and March 2005 in the historic churches of Saint Michael Archangel in Szalowa and Saint Catherine in Cracow (Poland). The measurements show that although irradiation at the floor level increases temperature and reduces relative humidity in the interior of the church, the effect out of the heated zone and for the surfaces sheltered from irradiation is very limited, i.e. their extent is comparable with natural fluctuations inherent to the local climate of the church. The radiant heaters proved to generate little convectional flow of the air. Therefore, the heating system was not found to increase the concentration of SPM indoors; in particular, no re-suspension of particles already present in the church was observed. This work has demonstrated that the overhead radiant heaters are capable of providing localised heat to the areas where people congregate without adversely affecting painted walls and the works of arts displayed in churches. Care, however, should be taken that sensitive works of art are not exposed to the direct infrared radiation.     

郑州市社区健身场所公共卫生状况的调查与对策

了解郑州市室内外健身场所及健身器械的环境卫生状况,为制定健身场所卫生标准提供科学依据.采用公共场所卫生标准检验方法,对郑州市10家大型健身房开馆时的微小气候(气温、风速和相对湿度)、空气质量(室内CO、CO2浓度和细菌总数)及社区路径健身器械生物性污染现状进行了检测.10家健身房内的CO、CO2浓度和细菌总数随着开馆时间延长而增高,与开馆前相比超标5.8%且差异有统计学意义(P＜0.01);室内、室外健身器械均受到不同程度的生物性污染,其中社区路径健身器械细菌的检出率分别高于室内健身器械.因此,应加强对公共健身场所的卫生管理,制定切实可行的清洁、消毒制度,做好经常性的卫生监督工作.     

主动进气格栅技术研究

随着主动进气格栅技术在汽车上的逐步使用,主动进气格栅的技术优势逐步体现,文章阐述了主动进气格栅对整车行驶阻力的优化和整车热控制的相关影响,并以线性回归模型的方法对主动进气格栅的标定方法进行了初步探索。