The Stability of SI Epidemic Model in Complex Networks with Stochastic Perturbation

Figure 2

𝜆=0.05, 𝜎_𝑘1=0.01, 𝜎_𝑘2=0.02. (a), (b) 𝑃(𝑘)=𝑚^𝑘exp(−𝑚)/𝑘!, 𝑚=6, 𝑅₀=0.9409≤1; (c), (d) 𝑃(𝑘)=2𝑚²𝑘⁻³, 𝑚=3, 𝑅₀=1.8142≥1.

(a)

(b)

(c)

(d)