*Vertices 3
1 "环境化学" 0.0 0.0 0.0 x_fact 5.303030 y_fact 35.227273
2 "中国环境科学" 0.0 0.0 0.0 x_fact 6.439394 y_fact 23.863636
3 "安全与环境学报" 0.0 0.0 0.0 x_fact 12.878788 y_fact 40.909091
*Matrix 
0.000000 0.505008 0.242809 
0.505008 0.000000 0.288232 
0.242809 0.288232 0.000000