Aiming at the difficulties in analyzing and designing this kind of asynchronous systems, we investigate the continuityproperty of its' close loop performance on the time delay of sampler and hold.
The result of simulation shows that the method can detect weak edges which possess strong continuity and anti-noise property, also is superior to the traditional edge detection operators.
Soil model of Winkler and Soil model of elastic half-infinite system can not include the soil continuity and layered property, shearing stress in soil and stress diffusing.