*Vertices 4
1 "中国农业科学" 0.0 0.0 0.0 x_fact 17.203390 y_fact 38.474576
2 "华北农学报" 0.0 0.0 0.0 x_fact 5.000000 y_fact 8.305085
3 "作物学报" 0.0 0.0 0.0 x_fact 12.542373 y_fact 36.525424
4 "园艺学报" 0.0 0.0 0.0 x_fact 2.288136 y_fact 16.694915
*Matrix 
0.000000 0.597558 0.808253 0.235550 
0.597558 0.000000 0.575270 0.434298 
0.808253 0.575270 0.000000 0.000000 
0.235550 0.434298 0.000000 0.000000