Characteristics of the addressed networks.

<p>Red stars represent the node in-degree denoted by ⟨k_in⟩ and the green diamonds represent the node out-degree denoted by ⟨k_out⟩. (a) Random regular networks with homogeneous degree distribution of ⟨k_in⟩ = ⟨k_out⟩ = 4. (b) ER random networks with Poisson degree distribution; the degree heterogeneities rely on the average degree denoted by ⟨k⟩. (c) SF networks with power-law degree distribution, which results in large degree heterogeneities. (d) SW networks with long-tail degree distribution, which decreases much slower than the SF distribution.