基于模糊控制的智能变频空调控制系统研究

通过神经网络和模糊控制技术的结合,实现了模糊神经网络控制器FNNC和神经网络预测器NNP的结构设计。该设计可以提高压缩机的控制精度,加强控制系统的适应性,实现压缩机的智能化。     

因子分析法在空气质量综合评价中的应用

以中国某市空气质量为例,针对具有代表性的污染指标,运用因子分析法对所取指标进行空气质量的综合评价、分析,最终得到影响该市空气的主要污染源是可吸入颗粒物,主要污染是1、2、3、11月,从而为空气治污工作的开展提供一定的科学依据。     

飞秒涡旋光与产生的3次谐波在空气中的耦合传输

模拟飞秒涡旋光在空气中成丝产生涡旋3次谐波的过程。研究初始基频波的扰动分布和峰值功率对双色涡旋光演化的影响。对于具有对称扰动分布的初始基频波,双色涡旋不受初始峰值功率影响,能够在成丝过程中保持环形强度分布。但是,在高峰值功率情况下,涡旋的螺旋相位分布受到多丝的影响,多丝引起的相位积累效应破坏了双色涡旋的螺旋相位分布。对于具有不对称扰动的初始基频波,当形成多细丝时,双色涡旋的空间环形分布和螺旋相位分布都会被破坏。     

空气污染与大众健身关系的研究进展

通过查阅文献,发现空气污染与肺部炎症、心血管疾病、糖尿病的发生均有密切的关系,空气污染环境下机体处于长期缺氧状态是心肺疾病的诱因。总结出运动场所、运动时间与空气污染程度对健康的影响:空气污染情况下锻炼会导致代谢当量、最大呼气量等下降,并且这是一种长期的影响;城市环境下锻炼,志愿者血液白细胞、中性粒细胞升高;运动地点与交通道路距离越远,空气污染指数越低;规律性的体育锻炼可以降低空气污染引起的早死。     

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。     

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.