*Vertices 3
1 "植物生理学通讯" 0.0 0.0 0.0 x_fact 8.288770 y_fact 31.016043
2 "园艺学报" 0.0 0.0 0.0 x_fact 12.834225 y_fact 54.010695
3 "北京农学院学报" 0.0 0.0 0.0 x_fact 6.684492 y_fact 14.973262
*Matrix 
0.000000 0.601931 0.368022 
0.601931 0.000000 0.518275 
0.368022 0.518275 0.000000