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Objective:To establish a new fast and accurate method for identifying the authenticity and specifications of Fritillariae Cirrhosae Bulbus based on electronic nose technology， and to discuss the feasibility of this technology in the identification of decoction pieces. Method:Fritillariae Cirrhosae Bulbus was used as the research object， 80 batches of samples to be tested were collected， and the olfactory sensory data of the electronic nose were taken as independent variables （<italic>X</italic>）， the results of the method contained in the 2020 edition of <italic>Chinese Pharmacopoeia</italic> were taken as the focus， and the traditional empirical identification results were used as benchmarking information （<italic>Y</italic>）. Four chemometric methods， including discriminant analysis （DA）， least square support vector machine （LS-SVM）， principal component analysis-DA （PCA-DA） and partial least squares-DA （PLS-DA）， were used to establish the identification model ［<italic>Y</italic>=<italic>F</italic>（<italic>X</italic>）］ of authenticity and commodity specifications of Fritillariae Cirrhosae Bulbus， respectively. Wherein， the identification accuracy and time-consuming was taken as indicators to discuss the results. Result:After cross-verification by leave-one-out method， the correct rates of the above four models were 93.75%， 91.25%， 95.00% and 95.00%， respectively， and the PCA-DA and PLS-DA identification models were the best in terms of authenticity identification. In specification identification， the correct rates of these four models were 86.67%， 88.00%， 89.33% and 68.00%， respectively， and the PCA-DA identification model was the best. The electronic nose had a high accuracy in the identification of authenticity and specification model， and the time consuming was relatively short. Conclusion:Electronic nose technology can identify Fritillariae Cirrhosae Bulbus accurately and quickly， and has significant advantages in terms of timeliness and correct judgment rate.
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RESUMO O Modelo da Discriminação Justificada postula que o uso de justificativas exerce um importante papel na compreensão da discriminação. No presente estudo, testamos o MDJ no contexto da discriminação a estudantes que ingressaram na universidade por cotas raciais. Participaram do estudo 182 estudantes universitários, em sua maioria mulheres, que ingressaram na universidade pela ampla concorrência. Os participantes responderam a medidas de preconceito, de discriminação, de percepção de ameaça real e foram alocados em uma de três condições experimentais: valorização das cotas, ameaça real e controle. Verificou-se que a percepção de ameaça real exerceu um papel de mediação na relação entre preconceito e discriminação, independente da condição experimental, indicando o potencial explicativo do MDJ para compreensão da discriminação a cotistas.
ABSTRACT The Justified Discrimination Model postulates that the use of justifications exerts an important role in understanding discrimination. In this study, we tested the JDM in the context of discrimination against students who were admitted to the university through affirmative action policies. 182 college students, mostly women, who had not been admitted through affirmative action policies participated in the study. Participants completed measures of prejudice, discrimination, and perception of realistic threat and were assigned to one of three experimental conditions: affirmative action appreciation, realistic threat, and control. It was observed that the perception of realistic threat mediated the association between prejudice and discrimination independently of the experimental condition, which indicates the explanatory potential of the JDM for understanding discrimination against affirmative action beneficiaries.