*Vertices 9
1 "分析试验室" 0.0 0.0 0.0 x_fact 1.835536 y_fact 12.187959
2 "中国公共卫生" 0.0 0.0 0.0 x_fact 15.051395 y_fact 24.669604
3 "疾病控制杂志" 0.0 0.0 0.0 x_fact 3.524229 y_fact 5.212922
4 "实用预防医学" 0.0 0.0 0.0 x_fact 3.303965 y_fact 6.314244
5 "职业与健康" 0.0 0.0 0.0 x_fact 0.073421 y_fact 0.220264
6 "中国学校卫生" 0.0 0.0 0.0 x_fact 5.800294 y_fact 18.208517
7 "现代预防医学" 0.0 0.0 0.0 x_fact 2.349486 y_fact 4.625551
8 "中国卫生检验杂志" 0.0 0.0 0.0 x_fact 8.149780 y_fact 19.309838
9 "环境与健康杂志" 0.0 0.0 0.0 x_fact 5.580029 y_fact 9.251101
*Matrix 
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