OALib Journal期刊
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基于形态分量分析的保幅面波压制方法
Keywords: 面波压制,形态分量分析,稀疏表示,余弦变换,小波变换
Abstract:
?根据近年来发展起来的稀疏信号理论及有效反射波与面波的形态特征不同,将含面波炮记录单道化,采用形态分量分析(mca)方法分离面波。mca方法的核心是选取适当的字典,从有效反射波与面波的形态差异出发,选取-维非抽样离散小波波变换(udwt)字典和局部离散余弦变换(ldct)字典,-维udwt字典用来稀疏表示面波部分,-维ldct字典用来稀疏表示有效反射波部分。采用块协调松弛算法(bcr)求解目标函数,将单道化的含面波单炮记录分为有效反射波部分和面波部分,进而达到去除面波的目的。实际资料处理表明,利用本文mca方法能够有效压制面波,同时能较好地保护有效反射波(特别是反射波的低频、低波数成分),是-种保幅的面波压制方法。
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