This paper presents a method of measuring the particle mean size and dust concentration by small angle near forward light scattering optics and the extinction theory.
本文综合前向小角光散理论及消光原理，提出一种测量粉尘平均粒径及粉尘浓度的光学方法。
And the effects of small changes of thin film thickness, incident angle and wavelength on extinction index of this polarizer are also studied.
同时研究了薄膜厚度、入射角及波长的微小变化（或误差）对于该偏振器消光率的影响。
The extinction angle of the DC converter, which is usually used to study the commutation failure of the DC inverter, is an important parameter in the DC transmittal system.
直流换流器熄弧角是直流输电系统的重要电气量，常被用于判断直流输电系统逆变器的换相失败。
The extinction angle of the DC converter, which is usually used to study the commutation failure of the DC inverter, is an important parameter in the DC transmittal system.
直流换流器熄弧角是直流输电系统的重要电气量，常被用于判断直流输电系统逆变器的换相失败。
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