estimate of the weight of japanese quail eggs through fuzzy sets theory estimativa do peso dos ovos de codornas japonesas por meio da teoria dos conjuntos fuzzy

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ID: 235483
2012
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Abstract
Quail breeding is a viable alternative for animal production and due to its low investment, fast return of invested capital, use of small areas and creation of jobs has aroused much interest in Brazil. The aim of this study was to develop a model based on fuzzy set theory to predict the weight of eggs from Japanese quails. The proposed fuzzy model was based on data from field measurement experiments, as well as from literature referring to the influence of environment over the weight of eggs. To develop the fuzzy system, air dry-bulb temperature (t db, ° C) and relative air humidity (RH, %) were defined as input variables and trapezoidal and triangular membership functions were used, respectively. The absolute deviation between the values for observed egg weight and egg weight estimated by the fuzzy system, varied between 0.01 g and 0.32 g, and the average deviation was 0.14 g. The average error found was 2.33%, and the determination coefficient (R²) was equal to 0.668. The fuzzy system developed to estimate the weight of Japanese quail eggs, based on the t db and RH provided low values for absolute deviation and percentage error, allows a realistic estimate of the weight of eggs in different environmental conditions.
A cotornicultura é uma alternativa na produção animal que, pelo baixo investimento, rápido retorno do capital investido, utilização de pequenas áreas e à gereção de novos empregos, tem despertado grande interesse no Brasil. Neste trabalho, objetivou-se desenvolver um modelo baseado na teoria dos conjuntos fuzzy para a predição do peso de ovos de codornas japonesas. O modelo fuzzy proposto foi elaborado com base em dados experimentais oriundos de medições em campo, bem como da literatura, a respeito da influência do ambiente sobre o peso de ovos de codornas japonesas de postura. Para o desenvolvimento do sistema fuzzy, foram definidas, como variáveis de entrada, a temperatura de bulo seco (t bs, °C) e a umidade relativa (UR, %) do ar, sendo utilizadas curvas de pertinência trapezoidais e triangulares, respectivamente. O desvio absoluto entre os valores de peso dos ovos observados e os estimados pelo sistema fuzzy variou entre 0,01 g e 0,32 g, sendo o desvio médio de 0,14 g. O erro médio encontrado foi de 2,33 %, e o coeficiente de determinação (R²) foi igual a 0,668. O sistema fuzzy desenvolvido para estimar o peso dos ovos de codornas japonesas, com base na T e UR, proporcionou baixos valores de desvio absoluto e erro percentual, possibilitando estimar de forma realística o peso dos ovos em diferentes condições ambientais.
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Authors Jaqueline de Oliveira Castro, Alessandro Vieira Veloso, Tadayuki Yanagi Junior, Edison José Fassani, Leonardo Schiassi, Alessandro Torres Campos
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Journal information and software technology
Year 2012
DOI
10.1590/S1413-70542012000100014
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100014
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