*Vertices 4
1 "中国沼气" 0.0 0.0 0.0 x_fact 2.247191 y_fact 6.260032
2 "农业工程学报" 0.0 0.0 0.0 x_fact 0.321027 y_fact 52.487961
3 "中国给水排水" 0.0 0.0 0.0 x_fact 5.617978 y_fact 24.237560
4 "环境科学" 0.0 0.0 0.0 x_fact 3.049759 y_fact 17.014446
*Matrix 
0.000000 0.000000 0.262557 0.000000 
0.000000 0.000000 0.000000 0.000000 
0.262557 0.000000 0.000000 0.434110 
0.000000 0.000000 0.434110 0.000000