*Vertices 3
1 "北京林业大学学报" 0.0 0.0 0.0 x_fact 4.628821 y_fact 12.576419
2 "林业科学" 0.0 0.0 0.0 x_fact 5.764192 y_fact 15.196507
3 "生态学报" 0.0 0.0 0.0 x_fact 7.860262 y_fact 72.227074
*Matrix 
0.000000 0.574073 0.297069 
0.574073 0.000000 0.404176 
0.297069 0.404176 0.000000