*Vertices 3
1 "南京农业大学学报" 0.0 0.0 0.0 x_fact 5.535499 y_fact 11.672684
2 "中国农业科学" 0.0 0.0 0.0 x_fact 18.652226 y_fact 45.848375
3 "作物学报" 0.0 0.0 0.0 x_fact 15.523466 y_fact 42.478941
*Matrix 
0.000000 0.603078 0.537903 
0.603078 0.000000 0.846767 
0.537903 0.846767 0.000000