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

Table 5

Complexity and periodic analysis of IMFs in China.

Mode	PE value	Complexity	Main timescale
IMF1	0.998	High level	2.85631
IMF2	0.9681	High level	3.9769
IMF3	0.9892	High level	3.4697
IMF4	0.8675	High level	6.0823
IMF5	0.6574	Medium level	14.7714
IMF6	0.5669	Medium level	25.85
IMF7	0.4599	Low level	80.0119
IMF8	0.437	Low level	116.325
IMF9	0.4063	Low level	387.75
Residue	0.096	Trend level	>sample size