The atmosphere dispersiontheory 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
In this paper the study on the dispersiontheory, design, manufacture techniques, and efficiency test methods of diffraction gratings were made in a deep way.
本文对衍射光栅色散理论与光栅设计、制作工艺和效率检验方法做了较为深入的研究。
3
The dispersion, double electrical layers theory, drying methods, surface modification and characterization methods in preparing process of nanometer particles were introduced in this article.