亚阶(substage)是指一个亚期(subage)的时间内形成的地层,比阶低一级的最小级别年代地层单位。是阶 的再分。亚阶的命名规则与阶相同,用模式地点的地名来命名。亚阶的名称,还可称下、中、上亚阶。
利用相关系数在真实匹配点附近的统计特性,通过对相关系数进行曲线拟合,根据其一阶导数确定最大相关系数所在的位置,快速得到亚像素匹配点。
By using the statistic properties of the correlation coefficient, a curve correlation coefficient is calculated, and then the matching point is obtained through evaluating it's derivative function.
分析了华南东部茅口亚统和吴家坪阶的岩相古地理分区及厚度变化,在此基础上对几个有争论的问题进行了讨论。
The Lithofacies paleogeography and the thickness variation of Maokouan Subseries and Wuchiapingian Stage in east part of South China are analyzed and some questions in dispute are discussed.
对于多系统耦合问题,亚迭代耦合求解(耦合时间精度为二阶)对物理时间步长的依赖性不明显;
The coupled numerical result with the second_order time accuracy depends hardly on the physical time step for this multi_system coupling.
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