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• W2912157905 abstract "Natural magnetotelluric signals are extremely weak and susceptible to various types of noise pollution. To obtain more useful magnetotelluric data for further analysis and research, effective signal-noise identification and separation is critical. To this end, we propose a novel method of magnetotelluric signal-noise identification and separation based on ApEn-MSE and Stagewise orthogonal matching pursuit (StOMP). Parameters with good irregularity metrics are introduced: Approximate entropy (ApEn) and multiscale entropy (MSE), in combination with k-means clustering, can be used to accurately identify the data segments that are disturbed by noise. Stagewise orthogonal matching pursuit (StOMP) is used for noise suppression only in data segments identified as containing strong interference. Finally, we reconstructed the signal. The results show that the proposed method can better preserve the low-frequency slow-change information of the magnetotelluric signal compared with just using StOMP, thus avoiding the loss of useful information due to over-processing, while producing a smoother and more continuous apparent resistivity curve. Moreover, the results more accurately reflect the inherent electrical structure information of the measured site itself." @default.
• W2912157905 created "2019-02-21" @default.
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• W2912157905 date "2019-02-19" @default.
• W2912157905 modified "2023-09-25" @default.
• W2912157905 title "Magnetotelluric Signal-Noise Identification and Separation Based on ApEn-MSE and StOMP" @default.
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• W2912157905 doi "https://doi.org/10.3390/e21020197" @default.
• W2912157905 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7514680" @default.
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• W2912157905 hasPublicationYear "2019" @default.
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