*Vertices 4
1 "环境化学" 0.0 0.0 0.0 x_fact 7.727975 y_fact 19.938176
2 "中国环境科学" 0.0 0.0 0.0 x_fact 11.437403 y_fact 18.547141
3 "环境科学学报" 0.0 0.0 0.0 x_fact 14.992272 y_fact 28.902628
4 "环境科学" 0.0 0.0 0.0 x_fact 18.083462 y_fact 32.612056
*Matrix 
0.000000 0.550769 0.558318 0.528144 
0.550769 0.000000 0.799939 0.862906 
0.558318 0.799939 0.000000 0.817148 
0.528144 0.862906 0.817148 0.000000