Based on the target positioning methods,such as passive time difference of arrival(TDOA) positioning method and satellite navigation positioning method,the geometric positioning method which can be applied in the radar sensor network is proposed in the paper.

The geometrical location method (GLM) and moving station location method (MSLM) are presented and used in location simulation for special system.

A geometric method of qualitative analysis and stability analysis of plane dynamic system;

Study of geometric method for angle-of-arrival distribution according to phase fluctuation;

A geometric method was discussed for detendning the orbit of satellites in double satellites position ing system.

It deals with the fundamental concepts, variational principles, equations of motion, special problems, integration methods, algebraic structure, and the geometrical methods of nonholonomic mechanics.

This paper gives a general formula for the acceleration of instantaneous cen-tre of (?)gid body s rotation in the planar motion and the theorem of angular momentumof rigid body was worked out,with the geometrical method.