*Vertices 4
1 "中华口腔医学杂志" 0.0 0.0 0.0 x_fact 2.972399 y_fact 17.834395
2 "临床口腔医学杂志" 0.0 0.0 0.0 x_fact 22.929936 y_fact 36.305732
3 "现代口腔医学杂志" 0.0 0.0 0.0 x_fact 15.923567 y_fact 26.539278
4 "北京口腔医学" 0.0 0.0 0.0 x_fact 12.738854 y_fact 19.320594
*Matrix 
0.000000 0.809604 0.805523 0.636240 
0.809604 0.000000 0.834739 0.743593 
0.805523 0.834739 0.000000 0.780407 
0.636240 0.743593 0.780407 0.000000