In order to solve the problem, we proposed optimized weighted absorption boundary condition.
针对这一问题，提出了优化加权吸收边界条件。
The first order absorption boundary condition is applied to the outside boundary, which can avoid the error caused by the plane wave assumption.
在外边界上统一应用适合于人工源的一阶吸收边界条件来形成边值问题，可减小基于平面波假设造成的人为截断边界的影响。
Snapshot of wave field trial result says that this kind of absorptive boundary condition brings good absorption effect except.
波场快照试算结果表明，这种吸收边界条件吸收效果很好，而且形式简单，易于实现。
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