*Vertices 4
1 "清华大学学报" 0.0 0.0 0.0 x_fact 3.508772 y_fact 21.345029
2 "光学技术" 0.0 0.0 0.0 x_fact 0.877193 y_fact 19.883041
3 "中国机械工程" 0.0 0.0 0.0 x_fact 4.678363 y_fact 52.339181
4 "航空精密制造技术" 0.0 0.0 0.0 x_fact 4.678363 y_fact 6.432749
*Matrix 
0.000000 0.000000 0.000000 0.460649 
0.000000 0.000000 0.000000 0.554804 
0.000000 0.000000 0.000000 0.578086 
0.460649 0.554804 0.578086 0.000000