Also, the fitting formula of piecewise parabola interpolation is derived. The error evaluation based on ISO is accomplished for both experiential formula and parabola fitting formula.

导出了分段抛物线插值拟合公式，并对经验公式和抛物线拟合公式均以iso为基准进行了误差评估。

youdao

PID controllers for interpolation points are designed by Z - N setting empirical formula.

应用Z-N整定经验公式，对插值点进行了PID控制器设计；

youdao

A formula based on the interpolation for the rank of the element stiffness matrix is presented, and some reduced integration elements are examined.

得到了根据插值函数来计算刚度矩阵秩的计算公式，并对几种降阶积分单元进行了验算。

youdao