*Vertices 4
1 "中国科学B" 0.0 0.0 0.0 x_fact 0.000000 y_fact 6.622517
2 "大庆石油学院学报" 0.0 0.0 0.0 x_fact 7.726269 y_fact 15.011038
3 "石油学报" 0.0 0.0 0.0 x_fact 0.883002 y_fact 39.735099
4 "大庆石油地质与开发" 0.0 0.0 0.0 x_fact 5.739514 y_fact 38.631347
*Matrix 
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0.000000 0.000000 0.341835 0.471624 
0.000000 0.341835 0.000000 0.000000 
0.000000 0.471624 0.000000 0.000000