In the numerical simulation of the wave equation, to develop an absorbing boundary condition in the finite domain is a very important problem.

在地震波传播的数值模拟中，在有限区域建立吸收边界条件是一个很重要的问题。

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In numerical computation aspect, by implying new computational geometric field, computation error caused by boundary condition was decreased.

在数值计算方面，本文采用了新的计算域，减小了由于边界条件造成的计算误差。

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The validity of the absorbing boundary condition is verified by numerical experiments.

数值实验证实了该吸收边界条件的正确性。

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