二次曲面 [数] quadric surface
绝对二次曲面 the absolute quadrie
奇异二次曲面 [数] singular quadric
应力二次曲面 surface of tension ; quadric of stress ; stress quadric
回转二次曲面 quafric of revolution ; [数] quadric of revolution
密切二次曲面 [数] osculating quadric
拉伸二次曲面 quadric of stretching ; stretching quadric
真二次曲面 [数] proper quadric ; [数] proper quadric surface
有心二次曲面 [数] central quadric ; [数] central quadric surface
伸长二次曲面 elongation quadric
本文应用矩阵的运算，给出求二次曲面的切平面方程的一个筒单方法。
From this paper, the equations of tangent planes of a quadratic surface are obtained by matrix operations.
仿真实验和实物测量实验表明，给出的二次曲面拟合方法和不确定度估计方法是正确的。
The simulation and actual measurement experiments were conducted, which suggested that the methods of quadric surface fitting and uncertainty assessment presented be correct.
我们称这个曲面为应力二次曲面。
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