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

2. The conicoid fitting method used for transforming GPS elevation, and the basic structure and mathematic formulas of BP algorithm of neural networks are introduced briefly in this paper.

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

4. One is the conic treatment method with fixed water-head, and the other one is conicoid treatment method with changing water-head.

5. An algorithm for tetrahedron mesh that can approach to the conicoid boundary during the refined process was presented.

6. Through taking an example and comparing with neural network model and conicoid polynomial fitting model, the availability of LSSVM method o.

7. Rapid Prototyping provides a new method of aiding to diagnose. A hollow three dimension model with complicated conicoid surface was built and the prototyping processing was analyzed.

8. In the last of the paper, two math models, include plane fitting method and conicoid fitting method, are particularly analyzed based on some projects.

9. Among the optical equipments, non_spherical surface lens has been used in some practical system, so the study of optical character of rotational conicoid and it's thick lens will be valuable.

10. The simulation environment for the braking of aircraft was virtualized by conicoid model, planar paste, illumination and particle technology.

11. Non spherical surface lens can get rid of the spherical surface lens' shortcoming and will be highly valuable, so the study of image quality of rotational conicoid and its lens is meaningful.

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12. The detailed system design is then presented, and formulations of depth estimation from images reflected by single and double conicoid mirrors are investigated.

13. Several methods of error-revising, such as linear, conic and conicoid error-revising methods are comparatively studied.

14. The experimental result shows that the normal pressure distribution on the surface of the model blade is a conicoid, the maximum of the normal pressure is in the middle of the model blade.