second harmonic component中文什么意思

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after the nonlinear and absorption effect is taken into account in the applications where high power ultrasonic is involved, the first and second harmonic components of the sound field of stepped circular plate is analyzed, based on the kzk equation and quasi-linear condition
考慮到大功率超聲應用中的非線性和吸收作用，本文從kzk方程和準線性條件出發(fā)，對于工作在共振頻率下的這種階梯圓盤，推導了它的一階和二階諧波聲場計算方法。
firstly, second harmonic component ratio and dead angles of two phase inrush's dispersion in three-phase transformes are acted as input variable . secondly, the method applies improved algorithm based on the original algorithm of multi-layer forward back propagation network, that is to say, adding last variational effect of weight value and bias value to this time and making use of variable learning rate . at the same time, this method also adopts dynamic form in the number of hidden floor node
首先，文中將三相變壓器兩相涌流差流的二次諧波含量比和間斷角作為網絡的輸入變量；其次，利用對原有bp網絡訓練算法基礎上的改進型算法(即在計算本次權值和閾值的變化時增加上一次權值和閾值變化的影響以及采用變學習率，與此同時隱含層神經元個數(shù)采用動態(tài)形式)，通過樣本訓練使網絡結構模型達到最優(yōu)。

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