*Vertices 4
1 "卫生研究" 0.0 0.0 0.0 x_fact 4.565217 y_fact 20.217391
2 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 9.565217 y_fact 45.652174
3 "中华预防医学杂志" 0.0 0.0 0.0 x_fact 9.130435 y_fact 16.739130
4 "核技术" 0.0 0.0 0.0 x_fact 0.000000 y_fact 17.391304
*Matrix 
0.000000 0.213948 0.462503 0.000000 
0.213948 0.000000 0.561232 0.000000 
0.462503 0.561232 0.000000 0.304140 
0.000000 0.000000 0.304140 0.000000