Geological radar is a non-destructive test instrument that detect the underground objects by the quality of discontinuousness of the underground medium.

地质雷达是一种通过利用地下介质的不来探地下标的无损检。

It overcame the shortcoming of the hardthreshold function's discontinuousness and improves the constant error.

该阈值函数既克服了硬阈值函数不的缺点,又修正了软阈值函数存在的恒定偏差。