大气浓度 meaning in English

atmo heric concentration
atmosphere concentration
atmospheric concentration

In order to know about the relation between the indoor particle ' s concentration and time , the author educed a formula which shows the indoor particle ' s instantaneous concentration based on the indoor purifying model . the author also has analysed the relations between the indoor particle ' s concentration changing and some factors including the indoor particle ' s initialization concentration , outdoor particle ' s concentration , air speed , etc
在实际的工程应用中，需要知道室内颗粒物的浓度随时间变化的情况，本文建立了应用过滤材料的空调室内净化模型，推导出室内的颗粒物浓度瞬时式，并从理论上分析各种因素(室内初始颗粒物浓度、室外大气浓度、过滤风速及通风量等)与室内颗粒物浓度变化的关系，为实际的应用提供了指导。