*Vertices 3
1 "中华口腔医学杂志" 0.0 0.0 0.0 x_fact 2.636535 y_fact 15.819209
2 "牙体牙髓牙周病学杂志" 0.0 0.0 0.0 x_fact 9.792844 y_fact 40.489642
3 "实用口腔医学杂志" 0.0 0.0 0.0 x_fact 14.312618 y_fact 43.691149
*Matrix 
0.000000 0.281969 0.445971 
0.281969 0.000000 0.293194 
0.445971 0.293194 0.000000