一种集成经验模态分解的样本熵阈值微地震信号降噪方法

王亚娟, 李怀良, 庹先国, 沈统

A denoising method for microseismic signal based on the ensemble empirical mode decomposition of sample entropy threshold

Ya-Juan WANG, Huai-Liang LI, Xian-Guo TUO, Tong SHEN

表1 不同信噪比合成微地震信号去噪后信噪比与均方根误差

Table 1 Signal to noise ratio and root-mean-square error after micro seismic signal synthesized under different signal to noise ratio

低信噪比信号 (信噪/dB) 信噪比/dB 均方根误差 带通滤波 小波多尺度分析 文中方法 带通滤波 小波多尺度分析 文中方法 -6 -0.6685 3.4813 4.2578 1.2541×10-6 8.4185×10-7 7.4916×10-7 -7 -0.7374 2.4833 3.2462 1.3264×10-6 9.4437×10-7 8.4995×10-7 -8 -0.8780 1.4848 2.2462 1.3323×10-6 1.0594×10-6 9.4804×10-7 -9 -0.8968 0.4861 1.2818 1.3358×10-6 1.8850×10-6 1.0692×10-6 -10 -1.2649 -0.5130 0.3064 1.3999×10-6 1.3334×10-6 1.1989×10-6