*Vertices 2
1 "中国公共卫生" 0.0 0.0 0.0 x_fact 20.307692 y_fact 60.615385
2 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 6.153846 y_fact 39.384615
*Matrix 
0.000000 0.605033 
0.605033 0.000000