*Vertices 4
1 "炼油技术与工程" 0.0 0.0 0.0 x_fact 2.105263 y_fact 23.157895
2 "石油化工设备技术" 0.0 0.0 0.0 x_fact 5.789474 y_fact 14.736842
3 "石油化工设备" 0.0 0.0 0.0 x_fact 15.789474 y_fact 26.842105
4 "压力容器" 0.0 0.0 0.0 x_fact 5.789474 y_fact 35.263158
*Matrix 
0.000000 0.294964 0.213715 0.000000 
0.294964 0.000000 0.582783 0.334566 
0.213715 0.582783 0.000000 0.639681 
0.000000 0.334566 0.639681 0.000000