1·In order to evaluate results of pretreatment, two definitions of signal-to-noise ratio and background suppression factor were given.
为了评价预处理结果，定义了两个评价参数——信噪比和背景抑制因子。
2·How to consider harmonic suppression and power factor compensation comprehensively?
谐波治理及功率因素补偿如何综合考虑？
3·To increase power factor, the current distortion can be reduced by harmonic suppression technology.
为提高逆变电源的功率因数，必须采用谐波抑制技术降低输入电流的谐波畸变率。