*Vertices 2
1 "中国公共卫生" 0.0 0.0 0.0 x_fact 23.198198 y_fact 59.909910
2 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 7.882883 y_fact 40.090090
*Matrix 
0.000000 0.719848 
0.719848 0.000000