摩擦理论 meaning in English

frictional theory

The theory of tidal friction is the concern of dynamic oceanography .
潮夕摩擦理论是海洋动力学的课题。
The model from the input to the output of the piezoelectric traveling wave ultrasonic motor is established by synthetically using lagrange - maxwell equation , hertz elastic contact theory and coulomb friction theory , along with considering electromechanical coupling , influence of the interface force between the stator and rotor of the motor on the amplitude of the traveling wave inside the stator and dynamic contact friction friction force
利用拉格朗日?麦克斯韦方程以及赫兹弹性接触理论，库仑摩擦理论，考虑机电耦合效应，定、转子间界面力对弯曲行波的影响及其动态接触摩擦力，建立了压电行波超声波马达从输入到输出的机电耦联系统的数学模型。