*Vertices 4
1 "土壤学报" 0.0 0.0 0.0 x_fact 1.371571 y_fact 16.209476
2 "中国农业大学学报" 0.0 0.0 0.0 x_fact 8.977556 y_fact 16.957606
3 "农业工程学报" 0.0 0.0 0.0 x_fact 8.977556 y_fact 49.501247
4 "水利学报" 0.0 0.0 0.0 x_fact 0.997506 y_fact 17.331671
*Matrix 
0.000000 0.410426 0.000000 0.000000 
0.410426 0.000000 0.409585 0.302895 
0.000000 0.409585 0.000000 0.000000 
0.000000 0.302895 0.000000 0.000000