【摘要】 煤与瓦斯突出前有征兆显现——煤体声发射,然而实际采样到的煤体声发射信号往往含有许多噪声,严重影响了预测可靠性。利用小波变换的多分辨分析特性,对声发射信号进行提取,较好地滤除了噪声干扰,提高了预测的准确性。更多还原

【Abstract】 There is a sign before coal and gas outburst-acoustic emission,but a lot of noise included in acoustic emission affects reliability of prediction severely.The wavelet multi-resolution analysis is applied to distill acoustic emission and it can filters noise very well and improve veracity of prediction.更多还原