Table 10 Symbol meanings
Variables and parameters | Meaning |
|---|---|
\(\textrm{t}\) | Time |
\({x}_{1}\) | Cumulative BI |
\({\textrm{x}}_{2}\) | Cumulative VI |
\({\textrm{r}}_{1}\) | Inherent growth rate of cumulative BI |
\({\textrm{r}}_{2}\) | Inherent growth rate of cumulative VI |
\({\textrm{K}}_{1}\) | The upper limit of the cumulative BI |
\({\textrm{K}}_{2}\) | The upper limit of the cumulative VI |
\(\alpha\) | The coefficient representing the correlation effect of VI on BI |
\(\upbeta\) | The coefficient representing the correlation effect of BI on VI |