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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Abnormal behavior of IMF 6: (a) Instantaneous amplitude logarithmic likelihood for IMF 6; (b) instantaneous amplitude Hilbert Spectrum of IMF 6; (c) IMF 6; (d) electricity demand (blue) and weekly mean (orange).