The strong militarism in the north of the Tang Dynasty is not only the continuity of the military tradition, but also the reflection of the situation of the frontier and the culture of the epoch.
The seismic reflection characteristics of volcanic rocks are mostly strong amplitude, apparent low frequency and the continuity is bad.
火山岩地震反射特征主要为强振幅、视低频，而且连续性差。
3
The equivalent strong reflection coefficients can be estimated under the condition about the continuity of stratified structure in the set of adjacent traces.