Figure 2

The dynamical behavior of system ( 1 ), for different initials conditions and the parameters: \(\pmb{\mu_{0}=0.004}\) , \(\pmb{\mu_{1}=0.003}\) , \(\pmb{\mu_{2}=0.009}\) , \(\pmb{\mu_{3}=0.05}\) , \(\pmb{\mu=0.09}\) , \(\pmb{\Lambda =8}\) , \(\pmb{\beta=0.002}\) , \(\pmb{q=0}\) , here \(\pmb{\psi(I)=\frac{1}{1+I^{2}}}\) , \(\pmb{{\mathcal {R}}_{1}=1.5851}\) .