*Vertices 4
1 "中国寄生虫学与寄生虫病杂志" 0.0 0.0 0.0 x_fact 9.105960 y_fact 20.364238
2 "中国人兽共患病杂志" 0.0 0.0 0.0 x_fact 11.092715 y_fact 32.781457
3 "中国寄生虫病防治杂志" 0.0 0.0 0.0 x_fact 22.516556 y_fact 28.311258
4 "中国血吸虫病防治杂志" 0.0 0.0 0.0 x_fact 16.887417 y_fact 18.543046
*Matrix 
0.000000 0.762888 0.984276 0.977415 
0.762888 0.000000 0.817609 0.844642 
0.984276 0.817609 0.000000 0.981685 
0.977415 0.844642 0.981685 0.000000