Figure 3. Cross-validation of p_c1 and α_c.

(a,b) are for S_gc and NOI under different network size L when α = −1, respectively. There is an intersection of S_gc(p) at , while NOI reaches its maximum at when L = 800. Thus, p_c1 is identified as the average value 0.263. (c,d) are for S_gc and NOI when p = 0.263 under different α, respectively. For , S_gc has two phases, and NOI reaches its maximum at . Thus, α_c is identified as the average value −1. In (c,d), dark curves respectively represent the average values of S_gc and NOI, obtained from 1000 realizations, and each data point stands for one realization.