Theory and Modern Applications
Table 2 Estimated parameters of model (1)–(8), taking into account different control stage measures
From: A mathematical model for the spread of COVID-19 and control mechanisms in Saudi Arabia
Parameters | 0 to 30 days | 30 to 90 days | 90 to 120 days | 120 to 260 days. |
|---|---|---|---|---|
\(\alpha _{E}\) | 0.970103 | 0.745319 | 25.285168 | 60.624593. |
\(\alpha _{I_{U}}\) | 0.244387 | 0.000002 | 0.000688 | 0.000007. |
\(\alpha _{I_{D}}\) | 0.014381 | 0.000061 | 0.000091 | 0.000131. |
\(\beta _{E}\) | 0.1818 | 0.1818 | 0.190241 | 0.076462. |
\(\beta _{I_{U}}\) | 0.003330 | 0.000645 | 0.000464 | 0.000958. |
\(\beta _{R_{U}}\) | 0.0752 | 0.0752 | 0.0352 | 0.0352. |
\(\beta _{R_{D}}\) | 0.18554 | 0.779554 | 0.726325 | 1.1825. |
\(\beta _{Ex}\) | 0.010549 | 0.006583539 | 0.009839 | 0.02299. |
\(\mu _{L}\) | 0.05 | 0.05 | 0.01 | 0.00333333. |