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Early Shang Dynasty thought was based upon cyclicity.
商代早期的思想是根据旋回。
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Sequences tend to show cyclicity of changes in relative sea level and widespread unconformities, processes of sedimentation and sources of sediments, climate and tectonic activity over time.
层序多显示相对的海平面以及广泛分布的不整合,沉积作用的过程,沉积物的来源,气候和构造活动等随地质时代变化的旋回性。
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The activity trend of shallow and deep earthquakes in Northeastern China before 2005 has been estimated in this paper according to seismic natural cyclicity and astronomical period incident etc.
从地震活动时间序列的自然节律和地震天文周期等方面,对2005年以前东北地区浅震和深震的趋势,作了分析和预测。