设计一种简单、精确、高效的吸收边界条件是很有难度的。
Numerical computation results show that it is a simple and effective absorbing boundary condition.
目前，效果最好的吸收边界条件是完全匹配层（PML）。
The use of perfectly matched layer (PML) in cylindrical coordinates avoids the wasted computation.
联立这些不同的吸收边界条件于实际的有限差分计算可以给出好的结果。
We point out their advantages and disadvantages. A combination of these absorbing boundary conditions adapted to real structural model can give good results.
驻波行波边界条件(STWBC)是一种新近提出的概念清晰、实现简便的吸收边界条件。
Standing traveling wave boundary condition (STWBC), clear in concept and easy to implement, is a newly proposed absorbing boundary condition.
但是伪谱法也存在一定的问题，由于折叠效应的影响，普通的吸收边界条件不能达到良好的效果。
Because of the influence for wraparound, ordinary absorb boundary condition can, however, not achieve ideal effect.
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。
In the numerical simulation of the wave equation, to develop an absorbing boundary condition in the finite domain is a very important problem.
数值实验证实了该吸收边界条件的正确性。
The validity of the absorbing boundary condition is verified by numerical experiments.
实现了波动方程FDTD算法的PML吸收边界条件（WE PML） ，并进行了数值验证。
The perfectly matched layer absorbing boundary condition for the wave equation FDTD method (WE PML) is implemented and validated.
提出了一种基于FDTD方法的PML和MUR混合吸收边界条件。
A mixed absorbing boundary condition for FDTD was advanced based on PML and MUR.
本文提出一种用于声场时域有限差分法(FDTD)的高效吸收边界条件。
This paper presents a highly efficient absorbing boundary condition suitable for use in the finite-difference time-domain (FDTD) modeling of acoustic fields.
第二是辐射的条件通过格林函数在积分方程中自动可以得到满足，而不再需要吸收边界条件。
Secondly, without absorbing boundary conditions, radiation conditions are satisfied automatically in the integral equation by the Green's function.
本文讨论了在波动方程偏移问题中构造吸收边界条件方程的原则，并提出了求解具有吸收边界条件的偏移问题的一种新方法——矩阵拟合分解方法。
In this paper a fitting decomposition method is proposed and the principles for construe - ting equations which characterize the absorbing boundary conditions is discussed for wave equation migration.
研究了有限元正演算法的效率和精度、吸收边界条件等方面的问题，以提高反演系统的效率和精度。
To improve the efficiency and accuracy of the inversion system, problems such as the efficiency and accuracy of the forward modeling system, absorbing boundary conditions and so on, are also studied.
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。
The first order absorption boundary condition is applied to the outside boundary, which can avoid the error caused by the plane wave assumption.
使用一阶TDMEI吸收边界条件可以充分发挥它与激励源无关的优点，减小计算量，同时保证一定的精度。
The proposed first TDMEI absorbing boundary condition could sufficiently exert the virtue of independence of source, reduce calculation and guarantee precision at the same time.
采用时间上二阶、空间上高阶近似的交错网格高阶差分公式求解三维弹性波位移-应力方程，并在计算边界处应用基于傍轴近似法得到的三维弹性波方程吸收边界条件。
Here, we use second-order, temporal - and high-order spatial finite-difference formulations with a staggered grid for discretization of the 3-d elastic wave equations of motion.
采用时间上二阶、空间上高阶近似的交错网格高阶差分公式求解三维弹性波位移-应力方程，并在计算边界处应用基于傍轴近似法得到的三维弹性波方程吸收边界条件。
Here, we use second-order, temporal - and high-order spatial finite-difference formulations with a staggered grid for discretization of the 3-d elastic wave equations of motion.
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