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.
建立在大量实验的基础上，提出了磨料输送管道中压力梯度的理论分析方法，为将来的应用奠定了理论基础。
Based on an experimental exploration, an analytical framework is presented to allow theoretical calculations of vacuum conditions in the abrasive feed tube.
对流边界层中存在反梯度输送，因而K理论的应用受到限制。
Since the counter-gradient transfer may occur in the convective boundary layer K-theory is inadequate there.
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