Fig. 7
The periodic solution of Eq. (59) is shown via 3D and contour profiles with free parameters: \(\alpha =0.99,~\alpha _1=0.75,~\alpha _2=1.45,~\alpha _3=0.23,~\beta =0.98,~\kappa =0.55,~\zeta _1 =1.7,~\zeta _2 =0.4,~\zeta _3 =1.77,~\text{ and }~\omega =0.3.\).
