*Vertices 4
1 "土木工程学报" 0.0 0.0 0.0 x_fact 0.000000 y_fact 27.500000
2 "青岛建筑工程学院学报" 0.0 0.0 0.0 x_fact 13.500000 y_fact 17.500000
3 "环境科学" 0.0 0.0 0.0 x_fact 2.000000 y_fact 49.000000
4 "上海环境科学" 0.0 0.0 0.0 x_fact 2.000000 y_fact 6.000000
*Matrix 
0.000000 0.455104 0.000000 0.000000 
0.455104 0.000000 0.590133 0.712351 
0.000000 0.590133 0.000000 0.484836 
0.000000 0.712351 0.484836 0.000000