Computational and Mathematical Methods in Medicine Prediction of COVID-19 in BRICS Countries: An Integrated Deep Learning Model of CEEMDAN-R-ILSTM-Elman

Table 4

Complexity and periodic analysis of IMFs in Russia.

Mode	PE value	Complexity	Main timescale
IMF1	0.9934	High level	2.76630
IMF2	0.8413	High level	6.69736
IMF3	0.7113	High level	11.5681
IMF4	0.5635	Medium level	26.7894
IMF5	0.4579	Medium level	78.7738
IMF6	0.4213	Low level	212.083
IMF7	0.3470	Low level	254.065
Residue	0.0211	Trend level	>sample size