The noise-extracted signal which is reconstructed by the revised wavelet coefficient could clearly reflect the time difference between incidence wave and reflection wave.
经过修正后的小波系数重构得到的信号图能够消去大部分噪声，清晰地反映入射波和反射波之间的时差。
It is based on the least square of the difference between the real reflection first break time and corresponding modeled ray-tracing travel time.
此法以反射地震资料中的观测初至旅行时与模型射线追踪旅行时之差的最小平方法为基础。
The launch system USES ultrasonic echo and reflection of the time difference to measure the distance test.
该零碎应用发射超声波与反射回波时间差来测量待测间隔。
The launch system USES ultrasonic echo and reflection of the time difference to measure the distance test.
该零碎应用发射超声波与反射回波时间差来测量待测间隔。
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