common datum surface 公有基准面
A method for deriving the smoothed ground surface from CMP datum of static correction is given to form a common datum for velocity spectrum, time-depth conversion and depth migration in depth domain.
本文还给出了根据（静校正的）CMP基准面计算地表圆滑面的方法，统一了深度域中速度谱、时深转换和深度偏移的基准面。
This paper presents common requirements, and ideas to program the communication software in SCADA system meet the demands of flexible and efficient datum.
总结了燃气输配SCADA系统通信的一般需求，介绍一种通信软件程序设计思路，可以灵活高效地实现燃气输配SCADA中数据的采集和监控管理。
This paper introduces the basic knowledge of common statistical datum matrix and the matrixingmethod of these data.
介绍了常用统计量矩阵的基础知识，以及日常统计工作中常用的参数进行矩阵化的方法。
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