Degradation in the quality of migration images can arise because of alias during Kirchhoff 3-d migration.

克希霍夫三维偏移过程中，由于受假频的影响，偏移成像结果的质量往往会降低。

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The paper presents the methods and steps of building 3-D migration velocity field with "Slice Method"on INTERBASE system of CGG.

本文介绍了在CGG的INTERBASE系统上用“切片法”建立三维偏移速度场的方法和步骤。

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The pseudo 3-D migration-accumulation model based on buoyancy and Darcy's Law is used to simulate on secondary hydrocarbon migration.

对于油气二次运移，采用基于浮力驱动及达西定律的拟三维运聚模型。

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Two years later, while doing an urban migration study there, a reporter announced over a loudspeaker that he'd pay cash to anyone with information for a story about the Rockefeller in their midst.

FORBES: The reluctant Rockefeller

Also posting strong net migration gains for 2010-11 were Miami (second place), Washington, D.

FORBES: Where Americans Are Moving