The traditional methods for identifying beat wave and amplitude modulation wave are shortage. The main disadvantage of these methods is that they can 't correctly identify in some cases.
现有的拍波与调幅波的识别方法存在不足，本文提出了基于分形几何原理的辅助判别方法。
2
She filmed them, so that she could analyse the frequency with which they beat their tails as they swam and measure the amplitude of these powerful tail strokes .