Table 2: The values of indicators basing on complex network.

Variable Symbol Equation BD JN SJZ SZ
Average degree 2.78 2.65 2.92 2.91
Average shortest path l 13.82 20.9 14.9 18.2
Clusters C 0.056 0.06 0.09 0.08
Efficiency E 0.101 0.072 0.09 0.074
Correlation coefficient r 0.117 0.266 0.195 0.169
Number of community Z Gephi 19 22 23 19
Modularity Q 0.838 0.86 0.854 0.869
Average transfer time atr 1.068 1.314 1.464 1.242