*Vertices 3
1 "中国地方病学杂志" 0.0 0.0 0.0 x_fact 11.018131 y_fact 43.933054
2 "中国地方病防治杂志" 0.0 0.0 0.0 x_fact 16.596932 y_fact 31.520223
3 "中华流行病学杂志" 0.0 0.0 0.0 x_fact 1.394700 y_fact 24.546722
*Matrix 
0.000000 0.882069 0.000000 
0.882069 0.000000 0.000000 
0.000000 0.000000 0.000000