The paper is to prove the refraction on two kinds of medium interfaces of electricdisplacementline using the boundary condition of the electric field and Fermat Principle.
利用电场边界条件和费马原理证明电位移线在两种介质界面上的折射。
2
Stepping motor is a kind of electromechanical component that is driven in step angle or linedisplacement by electric pulse signal.
步进电动机是一种将电脉冲信号转换成相应的角位移的机电元件。
3
The principle of paper thickness on-line measurement using displacement differential method based on laser displacement sensor and electric eddy current displacement sensor is introduced.