in this paper,a method,which can determine the size distribution as well asabsolute mass concentration of solid particles from the forward light flux scattered withintwo solid angles based on Fraunhofer diffraction theory,is Presented.
基于Ｆｒａｕｎｈｏｆｅｒ衍射理论，提出一种利用前向双角度光通量测量微粒尺寸分布及浓度的方法。
Nowadays,two angle steel is generally used in the design of transmission steel towers.
在目前的输电铁塔设计中,双角钢应用普遍,而填板的计算设计却缺乏相应的规范。