Ajuste de modelos de platô de resposta via regressão isotônica

Gonçalves, Renata Pires; Chaves, Lucas Monteiro; Savian, Taciana Villela; Silva, Fabyano Fonseca e; Paixão, Crysttian Arantes

doi:10.1590/s0103-84782012000200026

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…Segmented regression models with response plateau are appropriate and frequently applied (SIQUEIRA et al, 2009;EKLUND et al, 2010;OZORES-HAMPTON et al, 2012;GONC ¸ALVES et al, 2012;XIUFU, 2016;KIM et al, 2018) in studies of nutritional requirements to establish the ideal level of a nutrient in the feed and may assist researchers in decision making regarding the diet of animals and also for animal or plant growth studies (SANTANA et al, 2016). However, the parameters estimation of models is generally performed using the classical approach, which makes the process dependent on the sample size.…”

Section: Introductionmentioning

confidence: 99%

Definition of Nutritional Requirements for Zinc in Broilers Using Bayesian Methodology

2022

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Studies about nutritional requirements of animals are important, among other reasons, in order to have an adequate knowledge of the essential levels of minerals added in feed, and thus, to produce it efficiently, to avoid elimination of minerals through feces and urine and prevent intoxication of the animal due to excess of a certain nutrient. The data used for the study are related to Zinc (Zn) content, in ppm, in the broilers’ tibia that received the same feed with nine different dosages of zinc. The quadratic segmented regression model with response plateau and the nonlinear segmented regression model with response plateau were fitted to data, using a bayesian approach and considering cases of homogeneity and heterogeneity of variances. The fitted models considering heterogeneity of variances were more appropriate for the data, according to the DIC fit criterion.

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Section: Introductionmentioning

confidence: 99%

Definition of Nutritional Requirements for Zinc in Broilers Using Bayesian Methodology

2022

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“…. , n, a função de verossimilhança para Fé dada por: 13) onde δ i = I {T i ≤C i }é a indicadora de censuraà esquerda no ponto C i . Com a aplicação do logaritmo, a função de log verossimilhançaé dada por:…”

Section: Figura 23: Interpretação Gráfica Do Pooling-adjacent-violatorsunclassified

“…Vale notar que se o termo a ser integrado for não-negativo, o EQMI possui a forma alternativa: 13) expressão que fornece o EQMI como sendo uma soma do viés quadrático integrado e da variância integrada.…”

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Estimação não paramétrica da distribuição do tempo de falha para dados de status corrente com erros de classificação

Maia¹

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Effect of water temperature and pH on the concentration and time of ozone saturation

Galdeano

Wilhelm

Goulart

et al. 2018

Braz. J. Food Technol.

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Ozone has been used for many years to disinfect water due to its oxidizing potential. Since it decomposes quickly into molecular oxygen, leaving no residue, it has important advantages for use. The decomposition of ozone is affected by the temperature and pH of the medium, low pH values and temperatures increasing its half-life, which can result in more efficient disinfection. With the objective of increasing the effectiveness of ozonation, this study investigated the effect of temperature (8 ºC and 25 °C) and pH (3.0 and 6.0) of the water on the saturation time and gas concentration, employing two initial gas concentrations (13.3 and 22.3 mg L-1). The concentration of ozone saturation increased as the temperature and pH of the medium decreased, as also with the higher initial gas concentration ( C0). The highest saturation concentrations were obtained at pH 3.0 and 8 °C (4.50 and 8.03 mg L-1 with C0 of 13.3 and 22.3 mg L-1, respectively). This higher ozone content could result in greater decontamination efficiency of the food products washed with this water.

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Ajuste de modelos de platô de resposta via regressão isotônica

Abstract: RESUMO Dentro do contexto nutricional, a suplementação de microminerais em rações para aves frequentemente é feita em quantidades superiores às exigidas na tentativa de assegurar o bom desempenho dos animais. Os experimentos do tipo dose

Cited by 3 publications

References 8 publications

Definition of Nutritional Requirements for Zinc in Broilers Using Bayesian Methodology

Definition of Nutritional Requirements for Zinc in Broilers Using Bayesian Methodology

Estimação não paramétrica da distribuição do tempo de falha para dados de status corrente com erros de classificação

Effect of water temperature and pH on the concentration and time of ozone saturation

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