ngineering-machinary seat system is described as an indenpent desgin element to obtain calculation method of optimal parameters (optimum damping ratio and optimum frequency ratio) for seat system excited by harmonic or white noise.

Reasonable lowest frequency ratio of this machine was brought forward by analyzing change of vibration body amplitude due to fluctuation of exciting frequency and mass of system,as well as relationship between vibration isolation coefficient and frequency ratio,and the influence of frequency ratio to eccentric rotor parameters.

By analyzing the vibrating isolation system,it discusses the relations among the parameters of the vibrating isolation system and how to select frequency ratio and damping of vibrating isolation system.

The infection of Rabi frequencyon steady-state populations of a moving three-level ladder-type atom;

One-photon EIT,two-photon EIT and two-photon EIA are obtained,due to the coherence between the drive Rabi frequency and Zeeman splitting.

Consequently, We numerically calculate and theoretically analyse the atomic reflection coefficient as a function of Rabi frequency and the kinetic energy of the atom moving along the y direction.