Taking the henhouse as semi-obturation system, dynamic conservation of NH3 in henhouse under ventilation condition was analyzed based on the law of conservation of mass.
利用物质守恒原理，以鸡舍为半封闭系统，分析了鸡舍内NH3在通风状态下的动态守恒情况。
She was in a critical condition under artificial ventilation and died on 9 May.
病人的病情危重并采用人口通气治疗，病人于5月9日死亡。
Under the condition of pulsed ventilation, the physical process of gas transport in the upper corner of mining face is analyzed, and the dynamic model of gas transport is set up.
在脉冲通风条件下，分析了回采工作面上隅角积聚区内瓦斯运移的物理过程，建立了上隅角积聚区瓦斯运移的动力学模型。
In the humid mountain areas, residents should be designed according the distinct local condition, under the principle of ventilation.
在湿热山地的住宅应结合当地的特殊条件，以通风的原理为理论依据进行设计。
Firstly, the characteristics of combustion and smoke movement were analyzed under the condition of longitudinal ventilation.
本文首先对纵向通风条件下火灾燃烧及烟气运动特性的影响进行分析和总结。
According to the ventilation network calculation of Liaoshang mine area, the ventilation system and the working condition under the mine were improved.
对辽上矿区金矿通风系统进行网络解算，完善了通风系统，改善了井下的作业环境。
Research purposes: Under the condition of natural ventilation, this paper analyzes and calculates the harmful gas concentration in each subsection of tunnel.
研究目的：分析计算隧道各个分段的有害气体浓度，以把握公路隧道在自然通风状态下，其有害气体浓度在隧道内部的分布情况。
Usually, numerical simulation and experiment method are be used for analyzing the interior airflow field under the condition of natural ventilation.
在研究自然通风下室内流场分布情况时，一般采用数值模拟与实验测量两种方法。
Studying on the characteristic of interior airflow under the condition of natural ventilation is the premise of better natural design.
研究自然通风室内流场分布特性是良好的自然通风设计的前提。
In case of meeting the dust collecting efficiency of the system, the economical ventilation quantity was determined making the system to be operated under economic condition.
在满足系统除尘效率的情况下，确定了除尘器经济入口风量，使系统经济运行。
The simulated result showed a optimum ratio of chimney length and width which is about 12:1 under the working condition of ventilation;
通风工况下的模拟结果显示烟囱风道通风的最佳长宽比为12：1；
The simulated result showed a optimum ratio of chimney length and width which is about 12:1 under the working condition of ventilation;
通风工况下的模拟结果显示烟囱风道通风的最佳长宽比为12：1；
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