In this paper, the limitation and shortage of the open channel flow measurement are pointed out based on the review of the flow measurement methods and velocity distribution in open channel.
A simple way was founded to solve the shortage in the cell size measurement of flow cytometry (FCM).
针对流式细胞术在细胞大小测量中的不足，提出了一种简单的解决方法。
3
Aiming at the shortage of traditional method of measuring power frequency parameters of overhead transmission lines, measurement of power frequency parameters by non power frequency is put forward.