*Vertices 4
1 "北京航空航天大学学报" 0.0 0.0 0.0 x_fact 2.222222 y_fact 17.777778
2 "飞行力学" 0.0 0.0 0.0 x_fact 10.666667 y_fact 21.777778
3 "空气动力学学报" 0.0 0.0 0.0 x_fact 1.333333 y_fact 19.111111
4 "宇航学报" 0.0 0.0 0.0 x_fact 7.111111 y_fact 41.333333
*Matrix 
0.000000 0.318966 0.000000 0.000000 
0.318966 0.000000 0.245199 0.450114 
0.000000 0.245199 0.000000 0.000000 
0.000000 0.450114 0.000000 0.000000