*Vertices 4
1 "昆虫知识" 0.0 0.0 0.0 x_fact 0.313480 y_fact 23.824451
2 "中国粮油学报" 0.0 0.0 0.0 x_fact 5.329154 y_fact 25.078370
3 "粮食储藏" 0.0 0.0 0.0 x_fact 5.015674 y_fact 33.855799
4 "郑州工程学院学报" 0.0 0.0 0.0 x_fact 9.404389 y_fact 17.241379
*Matrix 
0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.481558 
0.000000 0.000000 0.000000 0.660912 
0.000000 0.481558 0.660912 0.000000