*Vertices 4
1 "北京林业大学学报" 0.0 0.0 0.0 x_fact 2.637795 y_fact 6.220472
2 "林业科学" 0.0 0.0 0.0 x_fact 5.590551 y_fact 10.984252
3 "林业科学研究" 0.0 0.0 0.0 x_fact 3.897638 y_fact 9.055118
4 "应用生态学报" 0.0 0.0 0.0 x_fact 6.338583 y_fact 73.740157
*Matrix 
0.000000 0.599577 0.369863 0.249933 
0.599577 0.000000 0.759582 0.285943 
0.369863 0.759582 0.000000 0.212639 
0.249933 0.285943 0.212639 0.000000