中文说明：计算多重分形非趋势波动分析matlab程序,这是第二能量熵的matlab代码，用平面波展开法计算二维声子晶体带隙,快速扩展随机生成树算法，微分方程组数值解方法，计算晶粒的生长，入门级别程序。
English Description：
Calculation of the multi fractal detrended fluctuation analysis matlab program. This is the second energy entropy matlab code, using the plane wave expansion method; calculation of two-dimensional phononic crystal band gap, the rapid expansion of the random spanning tree algorithm, differential equations of the numerical solution method, to calculate the grain growth, entry-level program.