Using linear position vector,motion equation,and motion orbit equation that lie in the reference frame we describe the motion of the particle.

A ZEM calculating approach for super-range intercept under the influence of perturbation is presented first,and then the linear dynamic equation of ZEM is obtained using the variational method and the perturbation equation of Kepler orbit.

The conservation tensor and orbital equation of the isotropic three-dimensional harmonic oscillator;

Based on the Schwarzs Child Gauge, the moving orbital equation of the planets round the sun is derived, from directly finding the solution of the three geodefic equations relevant to r, φ and t.

In this paper,we give the orbital equations of a classical particle in coulomb poten tial and isotropic oscillate potential and their screened potentials are given.

The equation can be used to get the orbit equation easily.

The motion of charged particle acted upon by Lorentz force and other external force are analyzed,calculating formulae of orbit equation and curvature radius are derived.

In this article, by using analogy, we discuss the relatiions between classical wave and material wave and between electronic orbital motion and its self-rotation, and we find that analogy is an easy and convenient way to solve problems in Structure Chemistry.