*Vertices 5
1 "中华核医学杂志" 0.0 0.0 0.0 x_fact 3.406326 y_fact 29.440389
2 "核技术" 0.0 0.0 0.0 x_fact 12.652068 y_fact 32.116788
3 "核化学与放射化学" 0.0 0.0 0.0 x_fact 9.975669 y_fact 16.788321
4 "同位素" 0.0 0.0 0.0 x_fact 7.785888 y_fact 9.732360
5 "原子能科学技术" 0.0 0.0 0.0 x_fact 3.406326 y_fact 11.922141
*Matrix 
0.000000 0.217313 0.000000 0.738980 0.000000 
0.217313 0.000000 0.502788 0.659293 0.419894 
0.000000 0.502788 0.000000 0.582548 0.758644 
0.738980 0.659293 0.582548 0.000000 0.412664 
0.000000 0.419894 0.758644 0.412664 0.000000