*Vertices 4
1 "石油化工设备技术" 0.0 0.0 0.0 x_fact 4.678363 y_fact 14.619883
2 "石油化工设备" 0.0 0.0 0.0 x_fact 19.298246 y_fact 31.578947
3 "压力容器" 0.0 0.0 0.0 x_fact 5.263158 y_fact 38.011696
4 "化学工程" 0.0 0.0 0.0 x_fact 0.584795 y_fact 15.789474
*Matrix 
0.000000 0.559218 0.334663 0.000000 
0.559218 0.000000 0.618973 0.303309 
0.334663 0.618973 0.000000 0.000000 
0.000000 0.303309 0.000000 0.000000