Virtual Experimental Design of the Quadratic Surface Base on Computer;

Determine line of intersection of quadratic surface revolution and surface of revolution;

The circle line of several kinds of common quadratic surfaces;

Research on free-form surface reconstruction based on quadric surface and self-organized system;

Auto Drawing of quadric surface and its length calculation;

The study on circle section of quadric surface by the characteristic root;

The cross iteration method on the intersection of two conicoids in CAD/CAM system;

Study on resolving anaberrational points of conicoid;

We use least squre method to form conicoid mathematic model and fit the point cloud which has been grouped by octree subdivision method.

Inner point and exterior point of a quadric and its plane of the type of contact plane;

The article gives a way by which a quadratic curve is processed by a linkage,and then a quadric can be formed by revolving the quadratic curve as a generatrix around the axis.