中文说明：基于互功率谱的时延估计，计算两个矩阵之间的欧氏距离，加入重复控制，鲁棒性好，性能优越，基于matlab平台实现,二维声子晶体FDTD方法计算禁带宽度的例子。
English Description：
Cross power spectrum time delay estimation based on calculated Euclidean distance between two matrices, repetitive control is added, good robustness, superior performance, based on MATLAB platform, two-dimensional phononic crystal FDTD method calculation examples of band gap width.