Considering the internal dynamic excitation produced by stiffness excitation, error excitation and mesh impact excitation as well as the external excitation brought by impulsive acceleration, the dynamic finite element model of .

It is an essence reason that vibration and noises of gear system is rose by gear meshing dynamic excitation.

A dynamic finite element model of a gear reducer was es-tablished and used to analyze its dynamic response in time-domain and frequency-domain as well as one-third octave accel-eration grade for its structural borne noise of the gear reducer under dynamic excitation.

And based on the system theory s view,this paper puts the influence of the first time s output on the second into the model,which proves that it helps alleviating ratchet effects during dynamic incentives on the enterprise s manager.

This paper uses Game Theory to study dynamic incentive mechanism on Performance Comparison.

First, in the study of the dynamic incentive on the enterprise s managers, this thesis reestablishes the ratchet effects model by introducing Cobb-Dougl.

In order to meet testing requirements of MEMS periodic motion,a synchronous control system of stroboscopic imaging and motion excitation based on FPGA is built for the excitation of periodic motion and the image acquisition in the course of the high-speed motion of microstructures.