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

Table 2

Complexity and periodic analysis of IMFs in Brazil.

Mode	PE value	Complexity	Main timescale
IMF1	0.9907	High level	3.09803
IMF2	0.8835	High level	5.71084
IMF3	0.8588	High level	6.285
IMF4	0.6843	Medium level	20.8979
IMF5	0.6005	Medium level	35.6086
IMF6	0.4141	Low level	112.2954
IMF7	0.4281	Low level	167.416
Residue	0.0611	Trend level	>sample size