频率域有限体积波场模拟，可用于三角形不规则网格，较有限差分速度更快。-Frequency domain finite volume wave field simulation can be used for irregular triangular grid, faster than the finite difference.

这是一本关于学习FDTD的资料，我平时也看这本书，很不错(This is a study on the FDTD information, I usually read this book, very good)