From the system efficiency formuladerivation, the influential factors of system efficiency were considered.
本文从系统效率公式推导，分析了影响系统效率的主要因素。
2
In this paper, the working principle of the circuit and the formuladerivation of key parameters are presented.
文中详细分析了电路的工作原理，并给出了关键参数的公式推导。
3
The design idea and regulations of the non-numerical program can be used in other similar cases. This program can greatly afford facilities for the formuladerivation.