Figure 3

Comparison of the semi-analytical and numerical integration solutions . A: period, B: amplitude, C: period MPS, D: amplitude MPS. The values of ${\alpha }_i$ and ${\beta }_i$ ($i\in \left\{1,2,\dots ,n\right\}$) were randomized with a range of (0, 1), while the value of $K_i$ ($i\in \left\{1,2,\dots ,n\right\}$) was randomized with a range of (0, ${\beta }_i/{\alpha }_i$).