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。
2
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。
3
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.