提高位场深/浅源异常对比度的多尺度方法

A Multiscale Method for Improving the Contrast of Deep/shallow Source Anomaly

多尺度分析方法可以在不同的尺度上将信号分解成为轮廓和细节，这样有助于对信号进行更为精细的处理。简要介绍了多尺度方法应用于重磁数据处理的基本思想，从理论上讨论了基于多尺度方法提高重磁场深／浅源异常对比度的方法，并对其作了严格的证明。理论分析及模型实例表明，多尺度方法虽然不能将性质相同的异常完全分离，但可以有效地提高深源异常对浅源异常的对比度。在有浅源异常干扰的地区，可以有效地压制浅部干扰，突出深部场源信息。

A multiscale method can decompound the signal into outline and detail parts,which is helpfull greatly to a finer analysis.A brief introduction into the conception to apply the method in gravity data processing and the theory to improve the contrast of deep/shallow source anomaly are presented and proved strictly. Theoretical analysis and numerical modeling results show that the multiscale method does enhance the contrast of deep/shallow source anomaly though it can not completely separate the anomaly.This method can suppress disturbance from shallow source and enhance the information from deep source.