*Vertices 4
1 "石油大学学报" 0.0 0.0 0.0 x_fact 5.990783 y_fact 17.818740
2 "石油钻采工艺" 0.0 0.0 0.0 x_fact 6.605223 y_fact 14.592934
3 "石油钻探技术" 0.0 0.0 0.0 x_fact 8.141321 y_fact 35.791091
4 "石油学报" 0.0 0.0 0.0 x_fact 4.761905 y_fact 31.797235
*Matrix 
0.000000 0.485946 0.000000 0.324744 
0.485946 0.000000 0.413404 0.336305 
0.000000 0.413404 0.000000 0.000000 
0.324744 0.336305 0.000000 0.000000