*Vertices 4
1 "中国公共卫生" 0.0 0.0 0.0 x_fact 16.463415 y_fact 47.357724
2 "中华劳动卫生职业病杂志" 0.0 0.0 0.0 x_fact 4.268293 y_fact 21.138211
3 "环境与职业医学" 0.0 0.0 0.0 x_fact 11.991870 y_fact 17.479675
4 "环境与健康杂志" 0.0 0.0 0.0 x_fact 6.504065 y_fact 14.024390
*Matrix 
0.000000 0.306583 0.612128 0.776957 
0.306583 0.000000 0.614718 0.217081 
0.612128 0.614718 0.000000 0.680742 
0.776957 0.217081 0.680742 0.000000