把焊接电弧作为一个发尘点源，应用大气湍流扩散理论，建立了焊接过程中烟尘扩散的数学模型。
A mathematical model of fume diffusion in welding process was founded by considering welding arc as a spot source of generating fume and supplying the turbulent diffusion theory.
本论文还深入分析了大气衰减效应和大气湍流效应对激光传输的影响，然后给出了一种基于大气信道效应的大气信道模型。
The influence of atmospheric attenuation and turbulence to laser transmission is profoundly analyzed in the paper. Then , A model, based the atmospheric attenuation and turbulence effects, is present.
建立了再入体再入大气层形成的尾迹的工程模型，并运用边界层理论求解二维等压湍流尾迹流动。
An engineering model for hypersonic reentry body trail is established in this paper, and a calculation is performed by using boundary layer theory.
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