*Vertices 3
1 "卫生研究" 0.0 0.0 0.0 x_fact 4.823151 y_fact 31.189711
2 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 5.466238 y_fact 40.192926
3 "中华预防医学杂志" 0.0 0.0 0.0 x_fact 10.610932 y_fact 28.617363
*Matrix 
0.000000 0.000000 0.418632 
0.000000 0.000000 0.403642 
0.418632 0.403642 0.000000