*Vertices 5
1 "石油物探" 0.0 0.0 0.0 x_fact 7.869482 y_fact 28.598848
2 "中国海上油气" 0.0 0.0 0.0 x_fact 1.279591 y_fact 4.350608
3 "石油地球物理勘探" 0.0 0.0 0.0 x_fact 2.943058 y_fact 17.018554
4 "测井技术" 0.0 0.0 0.0 x_fact 1.279591 y_fact 6.078055
5 "石油勘探与开发" 0.0 0.0 0.0 x_fact 2.367242 y_fact 43.953935
*Matrix 
0.000000 0.000000 0.402085 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000 
0.402085 0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000