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	Provedor de dados Ciência Rural (1) PAB (1) Autor Fernandes,Tales Jesus (2) Pereira,Adriele Aparecida (2) Costa,Adriano Carvalho (1) Fernandes,Felipe Augusto (1) Meirelles,Sarah Laguna Conceição (1) Muniz,Joel Augusto (1) Mais... Palavra-chave Allometry (1) Coffea arabica (1) Double Gompertz (1) Double Logistic (1) Modeling (1) Nonlinear (1) Nonlinear model (1) Parameterization (1) Regression (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2019 (1) 2017 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Growth curves of meat-producing mammals by von Bertalanffy’s model PAB Fernandes,Felipe Augusto; Fernandes,Tales Jesus; Pereira,Adriele Aparecida; Meirelles,Sarah Laguna Conceição; Costa,Adriano Carvalho. Abstract: The objective of this work was to evaluate how the parameterization and the application of different allometric values affect the obtention of the most adequate fit of von Bertalanffy’s model, in the description of the growth curve of meat-producing mammals (bovine, pigs, rabbits, and sheep). Among the nonlinear models, von Bertalanffy’s has been very often applied in several areas, with different parameterizations. This model has been commonly used with an allometric value of m = 2/3; however, for mammals, it is believed that this value can be m = 3/4. The analyzed data referring to the mass of meat-producing mammals according to their age were obtained from research institutions and from the literature. The results showed that von Bertalanffy’s... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometry; Modeling; Nonlinear model; Parameterization; Regression. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104307 Double sigmoidal models describing the growth of coffee berries Ciência Rural Fernandes,Tales Jesus; Pereira,Adriele Aparecida; Muniz,Joel Augusto. ABSTRACT: This study aimed to verify if the growth pattern of coffee berries, considering fresh mass accumulation over time, is double sigmoid and to select the most suitable nonlinear model to describe such behavior. Data used consisted of fourteen longitudinal observations of average fresh mass of coffee berries obtained in an experiment with the cultivar Obatã IAC 1669-20. The fits provided by the Logistic and Gompertz models were compared in their single and double versions. Parameters were estimated using the least squares method using the Gauss-Newton algorithm implemented in the nls function of the R software. It can be concluded that the growth pattern of the coffee fruit, in fresh mass accumulation, is double sigmoid. The double Gompertz and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Double Gompertz; Double Logistic; Nonlinear. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000800401 Registros recuperados: 2 Primeira ... 1 ... Última

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