The topological properties of the HFS group.

N: number of nodes; L: number of links; Δ: network density; NC: number of components; NG: number of nodes in the giant component; : average degree; C: average clustering coefficient; l: average shortest path length; D: network diameter; λin: power of in-degree distribution; λout: power of in-degree distribution; r: total degree assortativity coefficient; rin: in-degree assortativity coefficient; rout: out-degree assortativity coefficient.N：节点数（number of nodes）；L：连边数（number of links）；Δ：网络密度（network density）；NC：连通分量数（number of components）；NG：最大连通分量节点数（number of nodes in the giant component）；⟨k⟩：平均度（average degree）；C：平均聚类系数（average clustering coefficient）；l：平均最短路径长度（average shortest path length）；D：网络直径（network diameter）；λ_in：入度分布幂指数（power of in-degree distribution）；λ_out：出度分布幂指数（power of out-degree distribution）；r：总度同配性系数（total degree assortativity coefficient）；r_in：入度同配性系数（in-degree assortativity coefficient）；r_out：出度同配性系数（out-degree assortativity coefficient）