With increasing longitudinal distance, the velocity Power Spectral Density (PSD) peak shifted to lower frequencies.
随着流向距离的增大，速度功率谱(PSD)曲线呈现峰值向低频移动的现象。
With increasing longitudinal distance, the velocity Power Spectral Density (PSD) peak shifted to lower frequencies.
随着流向距离的增大，速度功率谱(PSD)曲线呈现峰值向低频移动的现象。
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