Larger microbubbles showed higher subharmonic enhancement than non-fractioned ones. 通过分级分离除去较小微泡后所得的次谐波响应比未分离前显著增强。
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，得到一个自治动力系统，给出它的次谐波共振分叉图。
