基于相似度理论的黄曲霉定性标准样品定值统计分析

Statistical analysis of property attribute to qualitative reference material of Aspergillus flavus based on the similarity theory

目的应用相似度理论,对黄曲霉定性标准样品定值特性进行分析,确定定值最小特性数及各特性值权重。方法以黄曲霉原变种ATCC 9643特性中心为基准点,计算特性值与基准点的相似度,通过相似度的比较得出分类定值结果。结果采用6个最大权重特性对黄曲霉定性标准样品进行定值分析时,分离效率最高,目标类边界相似度为78%,即相似度大于78%的黄绿组物种可确定归属为黄曲霉。结论相似度理论适用于黄曲霉等多指标定性标准样品的定值分析。

Objective To analyze the property attribute of qualitative reference material of Aspergillusflavus by similarity theory and determine the minimum number of characteristic values and weights of each characteristic value Methods With central characteristic values ofAspergillusflavus ATCC 9643 as the reference, similarity of property attribute of the reference material was calculated, and classification result was obtained by comparing the similarity between the reference material and ATCC 9643. Results The highest separation efficiency was found when using 6 large-weight characteristic values for characterization of the property attribute of Aspergillus flavus reference material, while the boundary similarity of the target class was 78%, i.e. species of the yellow green group whose similarity was greater than 78% could be identified as Aspergillusflavus. Conclusion The similarity theory can be applied to the characterization of Aspergillusflavus reference material with multiple characteristics.