Figure 2From: Hopf bifurcation analysis in a fractional-order survival red blood cells model and \(\mathit{PD}^{\alpha} \) controlWaveform plot and phase portrait of the fractional-order model ( 2.7 ) with \(\pmb{\alpha = 0.92}\), \(\pmb{m = 0.2}\), and the initial value \(\pmb{u_{0} = 1}\). A Hopf bifurcation occurs and the periodic oscillation bifurcates from \(u^{*}\), where \(\upsilon = 21 > \upsilon_{0} = 19.6749\).Back to article page