*Vertices 2
1 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 0.510204 y_fact 55.612245
2 "实用预防医学" 0.0 0.0 0.0 x_fact 23.469388 y_fact 44.387755
*Matrix 
0.000000 0.752642 
0.752642 0.000000