*Vertices 3
1 "卫生研究" 0.0 0.0 0.0 x_fact 3.225806 y_fact 14.285714
2 "中国公共卫生" 0.0 0.0 0.0 x_fact 26.728111 y_fact 50.076805
3 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 10.138249 y_fact 35.637481
*Matrix 
0.000000 0.466246 0.229611 
0.466246 0.000000 0.813271 
0.229611 0.813271 0.000000