subharmonic

1.The error estimation of the quasi-synchronous sampling harmonics anal-ysis and the method used for measuring the subharmonics of periodic signalsare also discussed.

文中还对误差作了析和估计,并介绍了数次谐波的一种方法。

2.Resonance of surface waves of a given length is shown to be possible over bed waves with synchronous , subharmonic, or ultraharmonic wave lengths.

针对定长入射流，得到一自治动力系统，给出它的次谐波共振叉图。