General speaking, the matrix inversion will consume a large amount of computation time, which heavily hinder the application of 3-d implicit scheme in waveform migration.
通常，这种矩阵的求逆将耗费大量计算时间，严重制约了三维隐式方法偏移在实际资料处理中的广泛应用。
As a crucial part of high-resolution waveform inversion and reverse time migration, seismic modeling demands a high efficiency of computation.
作为高精度波形反演或逆时偏移的重要组成部分，地震波数值模拟对计算速度和效率提出了更高要求。
Although the wave field based pre-stack depth migration is the most reliable method for complex structure imaging, it has a high computation cost and a poor adaptation to geometry.
基于波场延拓的叠前深度偏移是实现复杂构造地质体成像的可靠方法，但存在着计算量大、对观测系统适应性差等缺点。
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