*Vertices 3
1 "卫生研究" 0.0 0.0 0.0 x_fact 7.627119 y_fact 44.491525
2 "中华劳动卫生职业病杂志" 0.0 0.0 0.0 x_fact 6.779661 y_fact 36.016949
3 "卫生毒理学杂志" 0.0 0.0 0.0 x_fact 10.169492 y_fact 19.491525
*Matrix 
0.000000 0.228456 0.523606 
0.228456 0.000000 0.591056 
0.523606 0.591056 0.000000