曲线平滑的开始，而不是陡然出现。
通过测井曲线平滑处理和深度校正，对生产测井资料进行了预处理。
By well logging smoothing processing and depth correction, the production log data is pretreated.
使用平滑算法消除倍频点、半频点和随机点产生的误差，实现基音曲线平滑。
Smoothing algorithm is exploited to remove the errors of multiple frequency point, half frequency point and random point, and realize pitch curve smoothing.
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