*Vertices 4
1 "中国农业科学" 0.0 0.0 0.0 x_fact 0.000000 y_fact 66.863905
2 "中国糖料" 0.0 0.0 0.0 x_fact 4.733728 y_fact 16.863905
3 "中国甜菜糖业" 0.0 0.0 0.0 x_fact 7.100592 y_fact 11.538462
4 "环境污染与防治" 0.0 0.0 0.0 x_fact 0.000000 y_fact 4.733728
*Matrix 
0.000000 0.000000 0.230388 0.000000 
0.000000 0.000000 0.837849 0.000000 
0.230388 0.837849 0.000000 0.230388 
0.000000 0.000000 0.230388 0.000000