1) change breath
换气
1.
It puts forward that inverted breaststroke and inverted crawl in synchronization may help beginners to master the way of change breath very conveniently.
本文通过对比实验,指出掌握水中换气方法是学习蛙泳技术及其他泳姿动作的关键,提出同步的反蛙泳和仰泳练习,可以使初学者快捷地学会蛙泳的换气动作。
2) air exchange efficiency
换气效率
1.
For evaluating the degree to which the supply air can remove indoor contaminants,gives an introduction to the concepts of the age of air,air exchange efficiency,ventilation efficiency,etc.
就空调送风气流组织排除室内污染物能力的评价,介绍了北欧及英国学者采用拉格朗日法提出的空气龄、换气效率、排污效率等概念,详细推导了示踪气体浓度与局部平均空气龄的关系,阐述了换气效率与排污效率的关系。
2.
The computation is done with Fluent soft and the evaluation index data that contains age of air, air exchange efficiency and recovery time etc are picked up and processed.
将实验与数值模拟相结合,根据实验数据修正数学模型,利用Fluent软件进行计算,重点对空气龄、换气效率、自净时间等评价指标进行了提取和处理,对两种气流组织方式的实验数据及计算结果进行了分析比较。
3.
The k-ε turbulence model was applied for numerical simulation of indoor fluid flow and age of air,and the air exchange efficiency was obtained.
笔者以YW25G型空调硬卧列车车厢为研究对象,在物理模型中考虑了旅客以及车厢内各障碍物(包括边桌、行李架、床铺、折座)等对流场的影响,采用k-ε湍流模型及数值模拟的方法,对硬卧车厢内流场及空气龄的分布变化规律进行研究,从而得到车厢内的换气效率。
3) interval ventilation time
换气周期
1.
The effect of interval ventilation time on quality of `Dongzao' jujube during hypobaric storage at low temperature was studied.
045MPa条件下,换气周期对冬枣贮藏品质的影响。
4) ventilation
通风换气
1.
Presents three commonly used engineering control methods, including ventilation, air filtration and ultraviolet germicidul irradiation (UVGI), discusses the relationship between ventilation rate and infection rate based on the Wells-Riley equation, gives the filtration efficiency of some air filters for bacteria, and analyses the limitation of UVGI for airstream.
阐述了微生物在空气中的传播机理,介绍了通风换气、空气过滤及紫外线杀菌三种控制方法,采用Wells-Riley方程分析了通风换气对降低感染率的影响,给出了一些常见空气过滤器的滤菌效率,分析了紫外线照射用于流动空气杀菌的局限性。
2.
Pratice indicates that ventilation is an important measurement to control the environment in chicken house.
现代养鸡生产中，通风换气是调节鸡舍环境的重要措施。
5) exchange gas source
更换气源
6) air change rate
换气次数
1.
Tests air change rate in rooms with windows opening using the tracer gas method.
分析了开窗对室内温度的影响,利用示踪气体法测试了冬季工况下开窗房间的通风换气次数。
2.
Presents some hot research topics and their development, including pressure difference control, setting of surge chamber and spray chamber, air change rate and energy saving, numerical simulation of air distribution, and air filter and its leak detecting.
简述了实验动物房的布局原则,对三种空调系统形式进行了比较,介绍了压差控制、缓冲室和吹淋室的设置、换气次数及节能、气流组织的数值模拟、空气过滤器及其检漏等研究热点及其进展。
3.
The influences of four different terminals on the indoor air change rate are also compared by taking a project for example.
介绍了办公楼内外区负荷的变化情况;从风量、末端风机尺寸、噪声及能耗等方面比较了串联式和并联式风机驱动型末端装置的性能,并以一工程实例比较了四种不同的末端选择方案对室内空气换气次数的影响;从节能的角度出发,对变风量系统常用的两种控制方式—定静压控制和变静压控制作了比较。
参考词条
补充资料：换气功能
换气功能
氧和二氧化碳在肺泡和肺毛细血管中进行气体交换的过程。通过测定动脉血中氧和二氧化碳分压以了解换气情况。换气功能正常与否，与通气功能、吸入气体在肺内分布、灌注肺泡的血流分布和数量及肺泡膜对气体分子的通透性等因素有关。肺脏病变造成肺泡呼吸面积减少，气体弥散不良；或肺泡壁病变造成气体透过肺泡壁的功能障碍时，换气功能减弱。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。