*Vertices 3
1 "中国给水排水" 0.0 0.0 0.0 x_fact 5.672269 y_fact 35.294118
2 "环境科学" 0.0 0.0 0.0 x_fact 8.613445 y_fact 31.722689
3 "环境污染治理技术与设备" 0.0 0.0 0.0 x_fact 21.428571 y_fact 32.983193
*Matrix 
0.000000 0.276609 0.635908 
0.276609 0.000000 0.781385 
0.635908 0.781385 0.000000