Fig. 8From: Coupling effects on turning points of infectious diseases epidemics in scale-free networksExample of VRTP surface. An example of VRTP surface. It shows some fluctuations while k increases, and the location of the peak of VRTP moves toward β = 0, γ = 0. VRTP always has its maximum value below about 30% of the whole population as we calculated theoreticallyBack to article page