The purpose of migration is to inversely solve for the singularity (interrupted surface of interval velocity) of wave equation coefficient.
偏移的目的是要反演波动方程系数的奇性(层速度的间断面)。
Methods Use a standing wave tube to measure the sound absorption coefficient of many kinds of grain.
采用驻波管法测量了多种粮食的吸声系数。
The formulae of reflecting coefficient are derived from the theory of electromagnetic field for arbitrary incident electromagnetic wave to radar absorbing material.
从电磁场理论出发，推导出了电磁波以任意角入射时雷达吸波材料的反射系数公式。
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