Multiresolutional statistical machine learning for testing interdependence of power markets: A Variational Mode Decomposition-based approach

Adaptive Fourier Decomposition of the First Three SARS-CoV-2 Infection Waves with Epidemic Intervention — London, UK, 2020–2022

“…However, this method lacks a solid mathematical foundation ( 8 – 9 ). In contrast, the variational mode decomposition (VMD) method, employed by Saadaoui et al, provides an alternative but struggles to separate signal components that are indistinct in the Fourier spectrum ( 10 ). To surpass these limitations, Qian et al ( 11 – 13 ) have developed the adaptive Fourier decomposition (AFD), which offers a robust mathematical structure and improved adaptation to the signal wave curve, facilitating a more precise analysis of COVID-19 case fluctuations (Supplementary Material, available at https://weekly.chinacdc.cn/ ).…”