椭球

Isoperimetric inequality for sphere and ellipsoid is discussed, and the isoperimetric inequality of some region satisfying certain conditions is given.

全应力的变化范围常用应力椭球方程和应力椭球面来描述。

In this paper, unit moving trihedron is first constructed for a point on the surface of a revolution ellipsoid.

以旋转椭球体面上某为立个标单位活动标架。