第三，为了计算孔隙模型的微观波及效率，本文给出了驱替液波及边界的定义，并采用速度法确定其在流场中的位置。
Third, in order to calculate microscopic sweep efficiency in pore models, we define sweep boundary of displacement fluid, and determine it by velocity method.
利用多分辨分析的数据压缩作用来提高能量法的效率，利用约束能量法来处理边界约束。
The data compression effect of multiresolution wavelet analysis can improve the efficiency of energy method, and energy method can deal with boundary constraints.
边界单元法降低了求解空间的维数，减少了离散线性方程组的阶数，输入数据比较少，而工作效率高。
This method reduces the number of space dimension, makes the equation system lower order, less data input and higher efficiency .
应用这两种编程技术，可以有效提高边界元法计算效率，并能增强边界元法程序对计算机内存容量的适应性。
The application of these two skills can promote substantially the computation efficiency of BEM, and enhance the adaptability of BEM to the computer capacity.
此外，在伪谱法中引入匹配层边界条件后，只需对空间做一维傅里叶变换，大大提高了伪谱法的计算效率。
With the matched layer boundary conditions being introduced, only the 1-D Fourier transform in space is needed for the PS method, greatly improving the computational efficiency.
文中给出的数值算例表明了这种快速算法的计算效率是虚拟边界元法的2 0—80倍。
Numerical results show that the calculation efficiency of the fast algorithm proposed in the paper is 20-80 times higher than the virtual boundary element method.
文中给出的数值算例表明了这种快速算法的计算效率是虚拟边界元法的2 0—80倍。
Numerical results show that the calculation efficiency of the fast algorithm proposed in the paper is 20-80 times higher than the virtual boundary element method.
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