The L-moment method has theoretical advantages in hydrologic frequencyanalyses, but less practical application because of its complexities in calculation.
线性矩法在水文频率分析中具有理论优势，但因为计算复杂而实际应用较少。
2
This article analyses the applications and procedures in frequency transformation of multiplier from principle.
该文从原理上分析了相乘器在频率变换中的应用及过程。
3
Then, make monitoring on ordinary trouble, and frequency spectrum analysis on all kinds of lubricants, and analyses mechanism of happened faults to determine fault causes.