*Vertices 6
1 "干旱区地理" 0.0 0.0 0.0 x_fact 2.505695 y_fact 10.858011
2 "干旱区研究" 0.0 0.0 0.0 x_fact 2.961276 y_fact 8.618071
3 "中国沙漠" 0.0 0.0 0.0 x_fact 2.695520 y_fact 17.729689
4 "冰川冻土" 0.0 0.0 0.0 x_fact 1.518603 y_fact 19.552012
5 "植物学报" 0.0 0.0 0.0 x_fact 1.290812 y_fact 9.111617
6 "生态学报" 0.0 0.0 0.0 x_fact 6.150342 y_fact 34.130600
*Matrix 
0.000000 0.220315 0.000000 0.000000 0.000000 0.000000 
0.220315 0.000000 0.204676 0.000000 0.000000 0.000000 
0.000000 0.204676 0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 
0.000000 0.000000 0.000000 0.000000 0.000000 0.299632 
0.000000 0.000000 0.000000 0.000000 0.299632 0.000000