second harmonic components meaning in Chinese

二次谐波分量

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
考虑到大功率超声应用中的非线性和吸收作用，本文从kzk方程和准线性条件出发，对于工作在共振频率下的这种阶梯圆盘，推导了它的一阶和二阶谐波声场计算方法。
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，文中将三相变压器两相涌流差流的二次谐波含量比和间断角作为网络的输入变量；其次，利用对原有bp网络训练算法基础上的改进型算法(即在计算本次权值和阈值的变化时增加上一次权值和阈值变化的影响以及采用变学习率，与此同时隐含层神经元个数采用动态形式) ，通过样本训练使网络结构模型达到最优。