*Vertices 7
1 "分析试验室" 0.0 0.0 0.0 x_fact 2.490660 y_fact 20.049813
2 "预防医学情报杂志" 0.0 0.0 0.0 x_fact 0.124533 y_fact 0.996264
3 "实用预防医学" 0.0 0.0 0.0 x_fact 4.109589 y_fact 9.215442
4 "职业与健康" 0.0 0.0 0.0 x_fact 0.124533 y_fact 0.373599
5 "中国学校卫生" 0.0 0.0 0.0 x_fact 7.471980 y_fact 28.518057
6 "现代预防医学" 0.0 0.0 0.0 x_fact 4.234122 y_fact 8.094645
7 "中国卫生检验杂志" 0.0 0.0 0.0 x_fact 13.823163 y_fact 32.752179
*Matrix 
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.378985 
0.000000 0.000000 0.000000 0.000000 0.000000 0.331753 0.000000 
0.000000 0.000000 0.000000 0.214778 0.275303 0.496247 0.254332 
0.000000 0.000000 0.214778 0.000000 0.000000 0.563889 0.000000 
0.000000 0.000000 0.275303 0.000000 0.000000 0.246246 0.000000 
0.000000 0.331753 0.496247 0.563889 0.246246 0.000000 0.330824 
0.378985 0.000000 0.254332 0.000000 0.000000 0.330824 0.000000