*Vertices 17
1 "中国沙漠" 0.0 0.0 0.0 x_fact 2.286973 y_fact 7.428426
2 "地理学报" 0.0 0.0 0.0 x_fact 2.693546 y_fact 4.141962
3 "植物生态学报" 0.0 0.0 0.0 x_fact 9.774691 y_fact 11.019820
4 "西北植物学报" 0.0 0.0 0.0 x_fact 1.626292 y_fact 3.235643
5 "植物学报" 0.0 0.0 0.0 x_fact 5.929189 y_fact 7.851940
6 "生物多样性" 0.0 0.0 0.0 x_fact 1.812638 y_fact 2.430967
7 "应用与环境生物学报" 0.0 0.0 0.0 x_fact 1.033373 y_fact 1.854989
8 "北京林业大学学报" 0.0 0.0 0.0 x_fact 2.041335 y_fact 3.252583
9 "林业科学" 0.0 0.0 0.0 x_fact 3.371167 y_fact 4.844994
10 "林业科学研究" 0.0 0.0 0.0 x_fact 1.744875 y_fact 3.049297
11 "水土保持学报" 0.0 0.0 0.0 x_fact 1.710994 y_fact 6.030832
12 "草地学报" 0.0 0.0 0.0 x_fact 1.092665 y_fact 1.719465
13 "草业学报" 0.0 0.0 0.0 x_fact 1.821108 y_fact 4.785702
14 "生态环境" 0.0 0.0 0.0 x_fact 0.601389 y_fact 1.287481
15 "生态学报" 0.0 0.0 0.0 x_fact 8.936134 y_fact 15.534474
16 "应用生态学报" 0.0 0.0 0.0 x_fact 7.750296 y_fact 17.482636
17 "生态学杂志" 0.0 0.0 0.0 x_fact 3.100119 y_fact 4.048789
*Matrix 
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