Table 3.

Components of the strongly non-linear SpInItIbD-N.

Component	Description
$a_{11}$, $a_{21}$, $a_{31}$, $a_{41}$, $a_{51}$	Unknown internal parameters non-linearly associated with the $S^p$, $I^n$, $I^t$, $I^b$, and $D$, respectively.
$a_{22}$, $a_{32}$, $a_{42}$	Unknown coupling parameters of the $I^n$, $I^t$, and $I^b$, respectively.
$b_1$, $b_2$, $b_3$, $b_4$, $b_5$	Unknown parameters of the non-pharmacological policies contributing to the $S^p$, $I^n$, $I^t$, $I^b$, and $D$ sub-models, respectively.