The time-domain response model of flaw long screw drill and pour pile was established based on the damped wave equation of pile-soil interaction system.

In this paper the time-domain response of nonuniform coupled transmi- ssion lines with linear terminals is analyzed by numerical inverion of the Laplace transform.

A new method is developed for identifying structural damages at the element level by using time-domain response data at a few points caused by random loadings.

A new dividing method of control region based on the time domain response is first established.

This method can be used to distinguish the time domain responses originated from the resonators and coupling apertures respectively, guide the adjustment of the resonators and the coupling degree of filters, obtain required response of filters.

The relations between pole distribution and time response of fractional-order systems are not the same as that of troditional systems.

According to the characters of Fourier transform, the low-frequency and high-frequency responses determine the late-time and early-time responses respectively.