Abgstract Through The analysis of measured low strain wave shape curve for pile foundation. The wave characteristics of shallow defeats in pile is shown.
通过对基桩低应变实测波形曲线的分析，说明桩身浅部存在缺陷的波形特征。
The Fourier analysis method is applied to decompose the air-gap magnetic density into the basic wave and a series of harmonic and wave shape eigen coefficient of air-gap magnetic field are calculated.
采用付立叶谐波分析的方法把气隙磁密分解为空间基波和一系列谐波，进而计算出气隙磁场波形特征系数。
Venation wave spectrum analysis finds out shape-structure change of mid-frequency signal fluctuation.
脉络波谱图分析查明了中范围（频率）信号波动的形态结构变化。
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