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dc.creatorOssani, Paulo Cesar-
dc.creatorRossoni, Diogo Francisco-
dc.creatorCirillo, Marcelo Ângelo-
dc.creatorBorém, Flávio Meira-
dc.identifier.citationOSSANI, P. C.; ROSSONI, D. F.; CIRILLO, M. Â.; BORÉM, F. M. Unsupervised classification of specialty coffees in Homogeneous sensory attributes through machine learning. Coffee Science, Lavras, v. 15, e151780, 2020. DOI: 10.25186/cs.v15i.1780.pt_BR
dc.description.abstractBrazil is the largest exporter of coffee beans, 29% world exports, 15% this volume in specialty coffees. Thereby researches are done, so that identify different segments in the market, in order to direct the end consumer to a better quality product. New technologies are explored to meet an increasing demand for high quality coffees. Therefore, in this article has an objective to propose the use of machine learning techniques combined with projection pursuit in the construction of unsupervised classification models, in a sensory acceptance experiment, applied to four groups of trained and untrained consumers, in four classes of specialty coffees in which they were evaluated sensory characteristics: aroma, body coffee, sweetness and general note. For evaluating classifier performance, in the data with reduced dimension, all instances were used, and considering four groupings, the models were adjusted. The results obtained from the groupings formed were compared with pre-established classes to confirm the model. Success and error rates were obtained, considering the rate of false positives and false negatives, sensitivity and classification methods accuracy. It was concluded that, machine learning use in data with reduced dimensions is feasible, as it allows unsupervised classification of specialty coffees, produced at different altitudes and processes, considering the heterogeneity among consumers involved in sensory analysis, and the high homogeneity of sensory attributes among the analyzed classes, obtaining good hit rates in some classifiers.pt_BR
dc.publisherUniversidade Federal de Lavraspt_BR
dc.rightsacesso abertopt_BR
dc.sourceCoffee Sciencept_BR
dc.subjectClassification modelspt_BR
dc.subjectData dimension reductionpt_BR
dc.subjectGroupings identificationpt_BR
dc.subjectProjection pursuitpt_BR
dc.subjectCafés especiais - Análise sensorialpt_BR
dc.subjectAprendizado de máquinapt_BR
dc.subjectModelos de classificaçãopt_BR
dc.subjectRedução dimensional de dadospt_BR
dc.subjectPerseguição de projeçãopt_BR
dc.titleUnsupervised classification of specialty coffees in Homogeneous sensory attributes through machine learningpt_BR
Appears in Collections:DES - Artigos publicados em periódicos
DEX - Artigos publicados em periódicos

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