a curve or surface whose equation (in Cartesian coordinates) is of the second degree
双语例句
An algorithm of feature surface recognition based on quadric surface fitting and geometry property was presented. 摘要提出了基于二次曲面拟合误差分析和几何属性分析的特征曲面识别算法。
The problem of the blending of the quadratic and thrice algebraic surfaces is transformed into the existence of the nonzero solution of some homogeneous linear equations. 摘要将一个二次曲面和一个三次曲面沿平面接口的拼接曲面的存在性转化为求三个多项式理想交的成员问题，进而化为一组齐次线性方程组的非零解的存在问题。
