Both mode coupling and modedistortion in the step-index fiber are studied theoretically in order to gain the effect of modedistortion on the beam quality.
为了研究模场畸变对于大模场光纤光束质量的影响，理论研究了阶跃光纤的模式耦合和模场畸变的特性。
2
The mode of the distortion of workpiece was studied. A software approach for rectifying three coordinate measuring machine data was proposed.
研究了工件的变形形式，并依此提出三坐标测量数据的软件矫正法。
3
Then we calculate the Lagrangian cost to balance the rate and distortion, by which we can find the best encoding mode.