*Vertices 4
1 "石油学报石油加工" 0.0 0.0 0.0 x_fact 7.692308 y_fact 17.307692
2 "炼油技术与工程" 0.0 0.0 0.0 x_fact 8.566434 y_fact 17.307692
3 "石油化工" 0.0 0.0 0.0 x_fact 15.209790 y_fact 44.580420
4 "石油炼制与化工" 0.0 0.0 0.0 x_fact 7.692308 y_fact 20.804196
*Matrix 
0.000000 0.454163 0.351556 0.633651 
0.454163 0.000000 0.344317 0.742912 
0.351556 0.344317 0.000000 0.461349 
0.633651 0.742912 0.461349 0.000000