The atmosphere dispersion theory was used to analyze the influence ol calm wind and gravity action on the diffusion of dust particles .
利用大气扩散理论分析了静风和重力沉降两种作用对尘粒在大气中扩散的影响；
2
Then this paper studied the effect of diffusion coefficient on concentration distribution and the conditions of substitution with numerical dispersion for physical diffusion.
通过将该半解析解与忽略扩散的数值解进行对比分析，讨论了数值弥散代替物理扩散的条件。
3
Dispersion also includes molecule diffusion and saturated disperse.