*Vertices 5
1 "石油大学学报" 0.0 0.0 0.0 x_fact 2.792957 y_fact 7.468124
2 "石油学报" 0.0 0.0 0.0 x_fact 5.100182 y_fact 15.786278
3 "石油勘探与开发" 0.0 0.0 0.0 x_fact 6.739526 y_fact 56.284153
4 "油田化学" 0.0 0.0 0.0 x_fact 1.335762 y_fact 7.710990
5 "大庆石油地质与开发" 0.0 0.0 0.0 x_fact 3.703704 y_fact 12.750455
*Matrix 
0.000000 0.348536 0.218231 0.235783 0.000000 
0.348536 0.000000 0.395241 0.000000 0.000000 
0.218231 0.395241 0.000000 0.000000 0.000000 
0.235783 0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000