摘要
为了得到微地震信号的关联维特征,计算了原始信号中噪声段和微地震脉冲段的关联维。结果表明:随着嵌入维数的增大,噪声段的关联维数逐渐减小,最终趋于0,表明微地震记录中的噪声信号的吸引子为0;微地震脉冲段的关联维则在达到最小值后再次增大,其值在一定的范围内,表明存在吸引子,噪声段和微地震脉冲的关联维特征明显不同;选择适当的相空间重构参数,可以得到更好的结果。
In order to get the features of correlation dimension of microseismic signal, correlation dimensions of noise segment and microseismic pulse segment of the original signals are calculated. The results show that the correlation dimension of noise segment decreases and approaches zero lastly when the embedding dimension increases,which indicates the attractor of the noise segment of microseismic is zero;the correlation dimension of microseismic pulse segment increases again after it reaching the minimum and its value is in a range which means an attractor existing and the features of correlation dimension of noise segment of microseismic are different obviously from the one of microseismic pulse segments. Better results can be achieved by choosing proper parameters of space reconstruction.
出处
《探测与控制学报》
CSCD
北大核心
2008年第4期76-80,共5页
Journal of Detection & Control
关键词
微地震
关联维
嵌入维
时延
吸引子
microseismic
correlation dimension
embedding dimension
time-delay
attractor
