快速多级边界元方面的文章，希望大家能够喜欢-Fast multi-level boundary element aspects of the article, I hope you will like

自然边界元方法的数学理论，较为简洁系统的介绍了边界元方法所需要的数学理论基础-The mathematical theory of natural boundary element method, relatively simple system of mathematical theory describes the boundary element method

Boundary element methods for acoustics