*Vertices 4
1 "石油钻采工艺" 0.0 0.0 0.0 x_fact 4.289544 y_fact 14.343164
2 "石油机械" 0.0 0.0 0.0 x_fact 4.021448 y_fact 22.252011
3 "石油学报" 0.0 0.0 0.0 x_fact 4.557641 y_fact 48.391421
4 "石油矿场机械" 0.0 0.0 0.0 x_fact 9.651475 y_fact 15.013405
*Matrix 
0.000000 0.219095 0.298176 0.327469 
0.219095 0.000000 0.000000 0.823745 
0.298176 0.000000 0.000000 0.229290 
0.327469 0.823745 0.229290 0.000000