quadric surface source 二次表面源
quadric surface fitting 二次曲面拟合
parametric quadric surface 二次参数曲面
pole of a quadric surface [数] 二次曲面的极点
revolving quadric surface 二次旋转曲面
proper quadric surface [数] 真二次曲面
general quadric surface [数] 一般二次曲面
nonsingular quadric surface [数] 满秩二次曲面
central quadric surface [数] 有心二次曲面
The common method to quadric surface equation is to get the Normal Component first, and then write out the equation through dot method.
求切平面方程的一般方法是先求切平面的法向量(借助偏导)，再用点法式写出切平面的方程。
With the Lagrange multiplier method, the minimum distance of the center of a circle and a quadric surface was provided and the tangency condition of curve and surface was given.
利用拉格朗日乘子法求解二次曲线和二次曲面之间的最小距离，给出了曲线与曲面相切的条件。
Main contents in relation to the hybrid modeling method are discussed, and some key techniques such as quadric surface feature extraction and blend surface feature extraction are addressed in details.
讨论了混合建模方法的主要研究内容，并研究了二次曲面特征和过渡曲面特征提取。
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