*Vertices 12
1 "科学通报" 0.0 0.0 0.0 x_fact 1.743157 y_fact 6.101049
2 "干旱区地理" 0.0 0.0 0.0 x_fact 3.173090 y_fact 9.437560
3 "干旱区研究" 0.0 0.0 0.0 x_fact 2.083617 y_fact 5.774207
4 "中国沙漠" 0.0 0.0 0.0 x_fact 3.390985 y_fact 11.657361
5 "冰川冻土" 0.0 0.0 0.0 x_fact 2.533025 y_fact 8.933678
6 "第四纪研究" 0.0 0.0 0.0 x_fact 1.892959 y_fact 3.785919
7 "地理学报" 0.0 0.0 0.0 x_fact 3.540787 y_fact 5.869536
8 "地理研究" 0.0 0.0 0.0 x_fact 2.546643 y_fact 5.460983
9 "经济地理" 0.0 0.0 0.0 x_fact 0.871578 y_fact 1.824867
10 "遥感学报" 0.0 0.0 0.0 x_fact 0.258750 y_fact 1.470789
11 "生态学报" 0.0 0.0 0.0 x_fact 7.313087 y_fact 17.921830
12 "应用生态学报" 0.0 0.0 0.0 x_fact 6.114667 y_fact 21.762223
*Matrix 
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