surface point meaning in Chinese

曲面点；曲面对点

The fractal increment of dynamic subsidence of the ground surface point induced by mining
采矿引起地表点动态下沉的分形增长规律研究
The following is a simple introduction to the thesis ' s main content : 1 . error analysis in surface fea variation of errors against the normal angular of surface points is produced about surface fea . a angular is selected according to error of surface fea
下面简要介绍本文研究的主要内容： ( 1 )曲面有限元计算的误差分析在对曲面的有限元计算产生的误差分析中，得出了曲面有限元计算的误差和曲面上相邻两点法线夹角的关系。
Based on the research of the characteristics of piezoelectric ceramic , this paper presents the analysis of the movement of the stator surface points and work principle of motor . this paper describes a theory about the influence of the ultrasonic vibration on the frictional properties of ultrosonic dring , and finds that the horizontal vibration produces friction driving force and vertical vibration affects horizontal driving effect
并且对行波型超声波电动机的减摩现象进行了研究，发现在接触区定子表面上一点的水平振动产生摩擦驱动力，垂直振动只起影响水平驱动效果的作用，得出垂直方向超声振动具有减振作用是引起超声驱动动摩擦系数降低的原因。