说明： 能量谱分析计算,用平面波展开法计算二维声子晶体带隙,包括最后计算压缩图像的峰值信噪比和压缩效果的源码。 ( Energy spectrum analysis and calculation, Computation Method D phononic bandgap plane wave, Including the final calculation of the compressed image peak signal to noise ratio and compression of the source.)
