*Vertices 4
1 "中国公共卫生" 0.0 0.0 0.0 x_fact 24.024390 y_fact 42.560976
2 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 14.756098 y_fact 35.000000
3 "中华预防医学杂志" 0.0 0.0 0.0 x_fact 3.536585 y_fact 7.804878
4 "中国慢性病预防与控制" 0.0 0.0 0.0 x_fact 8.170732 y_fact 14.634146
*Matrix 
0.000000 0.834806 0.620229 0.627348 
0.834806 0.000000 0.619385 0.780560 
0.620229 0.619385 0.000000 0.564376 
0.627348 0.780560 0.564376 0.000000