均方根误差

• The expression between rms of slop error ( rmss ) and absolute error is educed according to boundary condition and the presumption that the curved surface is quadratic when the structure deforms and the aberration is symmetric . when rmsa keeps constant , rmss will decrease along with the increasing radial
  假设薄膜结构在压力作用下,变形后的曲面为二次曲面,而且其变形是轴对称的,根据边界条件,推导出偏斜误差的均方根误差( rmss )与rmsa的关系式,得出当rmsa保持不变时, rmss会随着半径的增大而减小的结论。