中文说明：用平面波展开法计算二维声子晶体带隙,包含优化类的几个简单示例程序，高斯白噪声的生成程序，经典的灰度共生矩阵纹理计算方法，包括数据分析、绘图等等,合成孔径雷达（SAR)目标成像仿真。
English Description：
Using the plane wave expansion method calculating the band gap of two-dimensional phononic crystals, including optimization of several simple example program, the generation of Gaussian white noise process, classical gray co-occurrence matrix texture calculation method, including data analysis, drawing, synthetic aperture radar (SAR) target imaging simulation.