*Vertices 5
1 "石油钻采工艺" 0.0 0.0 0.0 x_fact 5.252525 y_fact 15.757576
2 "钻井液与完井液" 0.0 0.0 0.0 x_fact 3.838384 y_fact 14.747475
3 "油气田地面工程" 0.0 0.0 0.0 x_fact 0.808081 y_fact 1.414141
4 "石油学报" 0.0 0.0 0.0 x_fact 4.242424 y_fact 39.797980
5 "油田化学" 0.0 0.0 0.0 x_fact 7.070707 y_fact 28.282828
*Matrix 
0.000000 0.255970 0.606846 0.334616 0.000000 
0.255970 0.000000 0.337005 0.000000 0.259650 
0.606846 0.337005 0.000000 0.298099 0.000000 
0.334616 0.000000 0.298099 0.000000 0.000000 
0.000000 0.259650 0.000000 0.000000 0.000000