Study on the Hierarchical Structure of the “Belt and Road” Aviation Network Based on K-Core Analysis

Figure 2

The coreness and centrality of nodes: (a) the coreness and degree centrality; (b) the coreness and closeness centrality; (c) the coreness and betweenness centrality; (d) the coreness and eigenvector centrality.

(a)

(b)

(c)

(d)