采用特殊的水电极介质阻挡放电实验装置,获得了大气压下氩气与空气混合气体放电的稳定的斑图.用二维FFT(Fast Fourier Transform)的方法把斑图变换到频域中,通过对频谱细致的分析及图像的相关运算,给出了斑图的结构,分别为类六边形、六边形和不规则结构.
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