*Vertices 4
1 "中国沼气" 0.0 0.0 0.0 x_fact 3.529412 y_fact 9.803922
2 "中国给水排水" 0.0 0.0 0.0 x_fact 2.156863 y_fact 29.803922
3 "中国环境科学" 0.0 0.0 0.0 x_fact 4.705882 y_fact 18.627451
4 "农业环境科学学报" 0.0 0.0 0.0 x_fact 10.784314 y_fact 41.764706
*Matrix 
0.000000 0.213817 0.231382 0.234902 
0.213817 0.000000 0.000000 0.000000 
0.231382 0.000000 0.000000 0.490122 
0.234902 0.000000 0.490122 0.000000