Plane wave expansion method to calculate the band gap of two- dimensional phononic crystals, which are square with rounded square lattice formed scattering crystal, the final output of the energy band diagram of the data, so you need to use drawing software drawn.

平面波展开法计算二维声子晶体带隙\a2.m
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平面波展开法计算二维声子晶体带隙

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