back extraction method

基本解释

The lowest recognition rate of four type PD UHF signals reached 84.17% by using the multi-scale feature extraction method and back propagation neural network (BPNN).
采用本文提出的多尺度特征提取方法和反向传播神经网络对四种人工绝缘缺陷放电样本的识别正确率最低达到84.17%。
Objective To compare impregnation, extraction back to normal, continuous circumfluence, ultrasonic extraction, complex method of extraction of berberine hydrochloride in the Chinese extraction rate.
目的比较浸渍法、一般回流提取法、连续回流法、超声提取法、复合方法提取黄连中盐酸小檗碱的提取率。