Dispersion effect of surfactant on ultrafine talc;

Research on tribology property of Si_3N_4 ceramic and chilled iron under oil-less lubrication;

Path tracking control of underactuated surface vessels based on the differential flatness;

In order to meet their expectation of good control quality, a modified PID algorithm is designed, which includes special smoothing differential algorithm and variable integral parameter algorithm.

This paper used the mechanical model in which the relationship between minimal slipand tangential force is linear,to discuss constitutive relation of bodies about non-critical staticfriction, the equation F = kfo XN is established .