amplitude of first harmonic 基波振幅
First harmonic components 基波分量
first-harmonic 一次谐波 ; 基波
first harmonic oscillation 基本振荡
first-harmonic detection 基波分量检测
Thus a smaller membrane gives off a higher first harmonic .
较小的膜发出较高的第一陪音。
The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
复杂振动中频率最低的成分(基频或一次谐波)。
The method USES the DC component and the first harmonic of a curve's chain code expressed by Fourier series to fit the curve, avoiding the inverse calculation of an array used in general methods.
该方法利用闭合曲线的傅立叶级数表示的直流分量和一次分量实现对闭合曲线的椭圆拟合，可以避免通常椭圆拟合方法中的矩阵求逆问题。
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