基于Schumann共振时频图的新西兰北部地震异常分析

Mingyi Que, Yongming Huang, Yong Lu
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引用次数: 0

摘要

舒曼共振是极低频电磁场中的一种现象,一般以频谱图和时频图的形式以数据的形式表现出来。本文在分析舒曼共振0~50Hz时频图数据的基础上,分别提取舒曼共振时频图一阶和二阶的时间差矩阵和频差矩阵,并利用卷积自编码器对时频图进行编码和解码。在编解码过程中,结合约束构造映射函数,对时频图进行分解拟合,提高数据反映变化的能力。然后,根据得到的7个不同的指标矩阵,得到每个指标矩阵的行列式、秩和迹线,并对2016 - 2019年新西兰北部6级以上地震进行分析。最终实验结果表明,本文研究对象中选取的分析指标在事件前后一段时间内存在一定程度的反馈现象,表明时频图分析方法是可行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of seismic anomalies in northern state of New Zealand based on Schumann resonance time-frequency diagram
Schumann resonance is a phenomenon in the extremely low frequency electromagnetic field, which is generally presented in the form of spectrum diagram and time-frequency diagram in the form of data. In this paper, based on the analysis of the data of Schumann resonance 0~50Hz time-frequency diagram, the time difference matrix and frequency difference matrix of the first and second order of the Schumann resonance time-frequency diagram are extracted respectively, and the time-frequency diagram is encoded and decoded by convolution autoencoder. In the process of encoding and decoding, the mapping function is constructed by combining the constraints, and the time-frequency diagram is decomposed and fitted, so as to improve the ability of data to reflect changes. Then, according to the seven different index matrices obtained, the determinant, rank and trace of each index matrix are obtained, and the earthquakes with magnitude above six in the northern state of New Zealand from 2016 to 2019 are analyzed. The final experimental results show that there is a certain degree of feedback phenomenon in the selected analysis indicators in the research object of this paper for a period of time before and after the event, which shows that the method of time-frequency diagram analysis is feasible.
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