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Grey wolf optimization-based variational mode decomposition for magnetotelluric data combined with detrended fluctuation analysis

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
We present a magnetotelluric data denoising method that uses grey wolf optimization to optimize variational mode decomposition and combines it with detrended fluctuation analysis. First, envelope entropy is selected as the fitness function for grey wolf optimization and is used to determine the number of modes K and the penalty factor, which are the key parameters of the variational mode decomposition method. Then, the optimized variational mode decomposition method is used to decompose magnetotelluric data. Finally, the scaling exponent in detrended fluctuation analysis is used to determine the corresponding intrinsic mode function components to superimpose and reconstruct the useful magnetotelluric data. Extensive experiments and thorough analyses are performed on the synthetic data and field data. The results of the proposed method are compared with the results of the remote reference, variational mode decomposition, variational mode decomposition and matching pursuit, variational mode decomposition and detrended fluctuation analysis methods; the proposed method can improve the denoising performance and reliability of low-frequency magnetotelluric data. The reconstructed data are closer to the natural magnetotelluric data. The satisfactory performance in the results verifies the effectiveness of the design and optimization method.
Czasopismo
Rocznik
Strony
111--120
Opis fizyczny
Bibliogr. 38 poz.
Twórcy
autor
  • School of Geosciences and Info-physics, Central South University, Changsha, China
autor
  • School of Geosciences and Info-physics, Central South University, Changsha, China
autor
  • College of Information Science and Engineering, Hunan Normal University, Changsha, China
  • Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Science, Langfang, China
autor
  • Key Laboratory of Geophysical Electromagnetic Probing Technologies of Ministry of Natural Resources, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Science, Langfang, China
Bibliografia
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  • 8. Egbert GD, Livelybrooks DW (2001) Single station magnetotelluric transfer function estimates and the reliability of their variances. Geophys J Int 144(1):65–82
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  • 13. Kohli M, Arora S (2017) Chaotic grey wolf optimization algorithm for constrained optimization problem. J Comput Des Eng 5(4):458–472
  • 14. Kumar A, Zhou YQ, Xiang JW (2021) Optimization of VMD using kernel-based mutual information for the extraction of weak features to detect bearing. Measurement 168:108402
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  • 16. Li ZP, Chen JL, Zi YY, Pan J (2017) Independence-oriented VMD to identify fault feature for wheel set bearing fault diagnosis of high speed locomotive. Mech Syst Signal Pr 85(2):512–529
  • 17. Li J, Zhang X, Cai J (2019) Suppression of strong interference for AMT using VMD and MP. Chinese J Geophys 62(10):3866–3884
  • 18. Li J, Liu XQ, Li G, Tang JT (2020a) Magnetotelluric noise suppression based on impulsive atoms and NPSO-OMP algorithm. Pure Appl Geophys 177(11):5275–5297
  • 19. Li J, Zhang X, Tang JT (2020b) Noise suppression for magnetotelluric using variational mode decomposition and detrended fluctuation analysis. J Appl Geophys 180:104127
  • 20. Li J, Peng YQ, Tang JT, Li Y (2021) Denoising of magnetotelluric data using K-SVD dictionary training. Geophys Prospect 69(2):448–473
  • 21. Ling ZB, Wang PY, Wan YX, Li TL (2019) Effective denoising of magnetotelluric (MT) data using a combined wavelet method. Acta Geophys 67:813–824
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Uwagi
PL
Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-818dde2a-6875-41b0-9f84-e0b774a6fcdf
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