本章论述几种有关各种排放源的大气污染物浓度分布的估算方法。
This chapter describes methods of estimating airborne pollutant concentration distributions associated with various emission sources.
这里利用成熟的室外大气污染物扩散理论- 梯度输送理论和箱模式理论，提出焊接烟尘在室内的扩散模式和浓度分布的理论计算方法。
In this paper, the diffusion model and the theoretic calculation method of welding dust are given by gradient transportation theory and box model for outdoor atmospheric pollutants.
目的根据区域大气污染源分布研究确定区域大气污染物历史暴露浓度，确定健康调查工作范围。
Objective to study distribution of air pollution source, determine the historical exposure concentration of air pollution in the region, and assure the work scope of health investigation.
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