Decimation and Spectrum Correlation Analysis of Gravity Solid Tide Signal Based on Surface-Simplex Swarm Evolution Optimization Algorithm
Received date: 2018-06-28
Revised date: 2018-12-02
Online published: 2019-03-26
Supported by
Project supported by the National Natural Science Foundation of China "Research on key signal processing algorithms for extracting geophysical and seismic precursor information from gravitational solid tidal signals"(No. 41364002);Project supported by the National Natural Science Foundation of China "Research on key signal processing algorithms for extracting geophysical and seismic precursor information from gravitational solid tidal signals" (No. 41364002).
In order to reveal the correlation between the harmonic components in the earth's solid tidal wave and the non-correlation superposition relationship, and based on these relations, the tidal harmonic implicit in the gravitational solid tidal signal was analyzed. According to the position relationship among the Earth, the moon and the sun's rotating orbit, an orthogonal decomposition model of tidal force was established. Furthermore, on the orthogonal decomposition model of gravity solid tidal wave based on the independent component analysis of the improved SSSE intelligent optimization algorithm, the spectral correlation method was used to analyze the independent components of gravity solid tidal wave. Thus, the multiplicative demodulation after the orthogonal decomposition of the conformal wave was completely realized. Finally, the above model and algorithm were used to compare and analyze the actual observation data and the theoretical signal as reference background. The results show that the proposed model and method can effectively achieve the orthogonal decomposition of tidal harmonics, highlight the weak energy of the long period harmonics component, and reflect the change of tidal harmonic modulation relationship from the spectral correlation map.
Xinbao Yi , Wei Wei , Haiyan Quan . Decimation and Spectrum Correlation Analysis of Gravity Solid Tide Signal Based on Surface-Simplex Swarm Evolution Optimization Algorithm[J]. Advances in Earth Science, 2019 , 34(2) : 148 -155 . DOI: 10.11867/j.issn.1001-8166.2019.02.0148
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