*Vertices 10
1 "西北农林科技大学学报" 0.0 0.0 0.0 x_fact 2.644746 y_fact 9.006433
2 "沈阳农业大学学报" 0.0 0.0 0.0 x_fact 3.573981 y_fact 5.575411
3 "核农学报" 0.0 0.0 0.0 x_fact 0.643317 y_fact 5.861330
4 "土壤通报" 0.0 0.0 0.0 x_fact 4.646176 y_fact 9.506791
5 "湖南农业大学学报" 0.0 0.0 0.0 x_fact 1.286633 y_fact 3.716941
6 "吉林农业科学" 0.0 0.0 0.0 x_fact 2.430307 y_fact 4.789135
7 "吉林农业大学学报" 0.0 0.0 0.0 x_fact 3.288063 y_fact 11.007863
8 "辽宁农业科学" 0.0 0.0 0.0 x_fact 2.930665 y_fact 4.217298
9 "玉米科学" 0.0 0.0 0.0 x_fact 3.145104 y_fact 11.579700
10 "应用生态学报" 0.0 0.0 0.0 x_fact 4.002859 y_fact 34.739099
*Matrix 
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