*Vertices 4
1 "电加工与模具" 0.0 0.0 0.0 x_fact 3.942652 y_fact 11.648746
2 "制造技术与机床" 0.0 0.0 0.0 x_fact 7.347670 y_fact 10.931900
3 "机械工程学报" 0.0 0.0 0.0 x_fact 9.677419 y_fact 39.964158
4 "中国机械工程" 0.0 0.0 0.0 x_fact 8.243728 y_fact 37.455197
*Matrix 
0.000000 0.420395 0.259630 0.274484 
0.420395 0.000000 0.492658 0.809980 
0.259630 0.492658 0.000000 0.380629 
0.274484 0.809980 0.380629 0.000000