*Vertices 3
1 "中国危重病急救医学" 0.0 0.0 0.0 x_fact 1.420765 y_fact 43.278689
2 "中国急救医学" 0.0 0.0 0.0 x_fact 16.284153 y_fact 27.213115
3 "中华急诊医学杂志" 0.0 0.0 0.0 x_fact 5.901639 y_fact 29.508197
*Matrix 
0.000000 0.666208 0.000000 
0.666208 0.000000 0.514438 
0.000000 0.514438 0.000000