*Vertices 4
1 "数学学报" 0.0 0.0 0.0 x_fact 0.000000 y_fact 9.702970
2 "数学的实践与认识" 0.0 0.0 0.0 x_fact 23.168317 y_fact 35.841584
3 "系统工程理论与实践" 0.0 0.0 0.0 x_fact 5.544554 y_fact 32.475248
4 "系统工程" 0.0 0.0 0.0 x_fact 12.277228 y_fact 21.980198
*Matrix 
0.000000 0.255974 0.000000 0.000000 
0.255974 0.000000 0.756351 0.677779 
0.000000 0.756351 0.000000 0.869283 
0.000000 0.677779 0.869283 0.000000