According to theorem ofmotionofcentre of mass and theorem of moment of momentum about centre of mass, we derive the theorem of moment of momentum about instantaneous center of rotation.
从质心运动定理和相对质心的动量矩定理出发，导出了相对瞬心的动量矩定理。
2
The results show that the motionof atomic masscentre leads to the periodic evolution of the dynamics of the field phase and this period depends on the field mode structure parameter.