A basin wheel for grinding the elliptical groove of constant-velocity universal joint was presented.

At present, the finger-like grinding wheel is widely used to approximately grind elliptical groove in many manufacturers of CVJ, but the theoretical error of this method is large.

Relative dynamics and initialization condition for formation flying in elliptical orbits;

The configuration stability of the elliptical orbit satellite constellation requires the stabilization of the ascending node right ascension,the argument of perigee and the mean anomaly at the same time.

A theorem that the elliptical orbit parameters can be acquired by the latitudes and longitudes of flyer which flies around the earth with the gravitation is given and proved.

With the application of quanta general rule and ellipse equation, this paper concludes the relation between ellipse orbit and quantum number.

According to the requirement of application and design of early warning satellite covering with the northern hemisphere of earth,the project of non-isomorphic early warning satellites constellation is put forward using coverage characteristics of ellipse orbit,which is composed of ellipse orbit satellites and equator circle orbit satellites.

Aconcise discussion of elliptic orbit and energy level in hydrogen atom;

Based on the virtual target point and the ellipse trajectory theory,a new maneuver method in the free- flight phase is presented.

In order to compute the TBM (Tactical Ballistic Missile) s RCS (Radar Cross-Section) in midcourse, based on the TBM s kinematic characters of midcourse, the trajectory was simulated by using the ellipse trajectory theory.