*Vertices 4
1 "畜牧兽医学报" 0.0 0.0 0.0 x_fact 3.906250 y_fact 15.885417
2 "畜牧与兽医" 0.0 0.0 0.0 x_fact 9.895833 y_fact 29.947917
3 "中国草食动物" 0.0 0.0 0.0 x_fact 11.197917 y_fact 29.687500
4 "中国畜牧杂志" 0.0 0.0 0.0 x_fact 12.239583 y_fact 24.479167
*Matrix 
0.000000 0.299615 0.256750 0.658149 
0.299615 0.000000 0.260451 0.423245 
0.256750 0.260451 0.000000 0.561828 
0.658149 0.423245 0.561828 0.000000