The sidereal diurnal variation of cosmic ray ties up with the most basic and important problem in cosmic ray physics such as the origin, propagation and the acceleration mechanisms of cosmic ray.

The figures of spatial mechanisms and their vector diagrams of velocity and acceleration can also be transformed by those operators.

This paper sums up the difficulty of solving Angle acceleration and acceleration of planar four-bar linkage mechanisms by using center of speed method, and finds a simple method for all purposes.