For critical state model, the author derives an explicit formula of matrix h, which is used in implicit computation scheme.
对临界状态模型推导了用于隐式计算格式的H矩阵的显式表达式。
In order to reduce time consuming of computation, some accelerated techniques were studied such as parallel, implicit method of DP-LUR and dual time stepped method.
为了减少计算时间，研究了并行、隐式DP - LUR方法、双时间步长法等计算加速技术。
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。
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