提出了一种压电叠堆非共振Ⅴ形直线超声波电动机.电机工作在非共振状态下,在两路相位差90°的同频率正弦信号激励下,驱动头产生椭......

Homoclinic bifurcations in four-dimensional vector fields are investigated by setting up a local coordinate near a homoc......

Heteroclinic bifurcations in four dimensional vector fields are investigated by setting up a local coordinates near a ro......