The vertices of geometric model on the surface of object was chosen according to the curvatures which was computed directly from partialderivation of volume image.
该方法直接利用三维图像偏微分计算边缘的曲率，并根据曲率的特性，选取表面的顶点。
2
In this paper, we discussed some issues of PLSR. First, Partial Least Squares Regres-sion are given theoretical derivation.
本文就围绕偏最小二乘回归法展开讨论，首先，给出偏最小二乘回归法的理论推导。
3
By theoretical derivation, the partial derivatives of the deviation between the humidity sensing characteristic curve and the fitting line to the self-resistance are obtained.