*Vertices 4
1 "金属学报" 0.0 0.0 0.0 x_fact 0.939850 y_fact 31.203008
2 "焊接学报" 0.0 0.0 0.0 x_fact 7.142857 y_fact 18.796992
3 "中国机械工程" 0.0 0.0 0.0 x_fact 2.631579 y_fact 38.721805
4 "焊接" 0.0 0.0 0.0 x_fact 6.766917 y_fact 11.278195
*Matrix 
0.000000 0.252296 0.000000 0.000000 
0.252296 0.000000 0.205107 0.869325 
0.000000 0.205107 0.000000 0.000000 
0.000000 0.869325 0.000000 0.000000