seismic cycle

The low cycle reciprocating load experiment gives a good opportunity to study the seismic behavior of three kinds of T-shaped concrete steel tubular composite column and steel beam connected node.

通过低周往复荷载作用下的拟静力试验，对9个T形钢管混凝土组合柱-钢梁连接节点试件的抗震性能进行了研究。

Seismic regions in which large intermediate and deep focus earthquakes have significant 18.6 years cycle have been determined by analyzing correlation between the events and the tropic longitude of lunar ascending node.

分析全球中源和深源大地震与月球交点运动的关系，确定了15个地区的中源和深源大地震有明显的18.6a地震轮回。

Based on lithology, lithofacies, seismic reflection, log response, paleobiology, tectonic cycle, contact relationship and isotopic dating, the lower paleogene in the Liaohe Basin is divided into 4 sequences and 12 subsequences.

根据岩性、岩相、地震反射、测井响应、古生物、构造旋回、接触关系及同位素年龄测定等，将辽河盆地下第三系划分为4个层序和12个亚层序。