基于多级熵权投影决策法的禽肉沙门菌风险分级模型研究

Study of poultry meat Salmonella risk classification model based on entropy weight projection decision-making method

为构建基于熵权的投影决策法的禽肉沙门菌风险分级模型,探究影响禽肉沙门菌风险评估的主要因素及其影响强弱顺序,并对待评估地区的奶牛布病风险水平进行分级。从养殖管理、屠宰环节、运输与贮存环节、销售环节四个维度,设定了评价指标体系,选取了6个有代表性的地区进行了禽肉沙门菌风险调查,应用熵权投影决策法进行数据分析。结果显示,二级指标加权权重按由大到小顺序为:U23>U13>U12>U31>U44>U41>U22>U11>U45>U32>U21>U42>U43,在当前大环境下,这6个地方发生实际沙门菌风险概率分别为14.50%,12.26%,13.78%,12.91%,9.14%,12.78%。按照本文等级划分标准,可知6地沙门菌实际风险等级均为Ⅲ级或Ⅳ级。表明将熵权投影决策法引入到沙门菌风险评估中,用于影响因素分析及风险分级,使得分析结果更客观,更接近实际。

Poultry meat salmonella risk classification model based on entropy weight proiection decl- sion-making method was constructed and major factors affecting poultry meat salmonella risk assessment and their value order Were studied, which provided poultry meat salmonella risk level of these evaluated re-gions. The evaluation index system was set in four dimensions of breeding, slaughterhouse, transportation and storage and sale link. The six representative regions were selected to make poultry meat salmonella risk investigation, entropy weight projection decision-making method was applied for data analysis. Two grade index weightings according to the order from big to small are U2a 〉Ula 7〉U12〉U31〉U44〉U41 〉U22 U11〉 〉U45 〉U32〉U21 〉U42 〉U43. In the current environment, the actual poultry meat salmonella risk prob-abilityof the three evaluated regions were respectively 14.50%, 12. 26%, 13. 78%,12. 91%,9. 14%, 12.78%. According to the classification standard in the paper, risk levels of the six evaluated regions were Ⅱ or Ⅳ grade. The entropy projection method was introduced into the risk assessment of Salmonella, for the analysis of influencing factors and risk classification, which made the results more objective and closer to the actual ones.