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Registros recuperados: 23
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Methods of performance evaluation for the supervised classification of satellite imagery in determining land cover classes Ciencia e Investigación Agraria
Souza,Carlos H. Wachholz de; Mercante,Erivelto; Prudente,Victor H. R.; Justina,Diego D.D..
C.H.W Souza, E. Mercante, V.H.R. Prudente and D.D.D. Justina. 2013. Methods of performance evaluation for the supervised classification of satellite imagery in determining land cover classes. Cien. Inv. Agr. 40(2): 419-428. Satellite imagery, in combination with remote sensing techniques, provides a new opportunity for monitoring and assessing crops with lower cost and greater objectivity than traditional surveys. The present research employed Landsat 5/TM satellite imagery to identify the land cover classes in Cafelândia (Paraná, Brasil), a predominantly agricultural town. Five supervised classification methods (parallelepiped (PL), minimum distance (MND), Mahalanobis distance (MHD), maximum likelihood classifier (MLC) and spectral angle mapper (SAM))...
Tipo: Journal article Palavras-chave: Accuracy indices; Agricultural landscape; Classifiers; Remote sensing.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200016
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Spatial variability of soil chemical attributes and productivity and the chemical and physical properties of oranges Ciencia e Investigación Agraria
Nicolau,Rafaela F; Mercante,Erivelto; Maggi,Marcio F; de Souza,Eduardo G; Gasparin,Eloi.
The purpose of this study was to analyze the spatial variability of soil properties and productivity and the chemical and physical properties of oranges (Monte Parnaso variety) in their geographical quadrants. This experiment was conducted in a commercial orange orchard in the municipality of Nova Laranjeiras in the State of Paraná, Brazil. A GPS receiver and a total station were used to measure the spatial location of the fruit and to determine which quadrant they were located in. In this experiment, 13 trees were studied. Twelve fruits were evaluated in each geographical quadrant, and 156 fruits were considered. After harvest, the productivity was expressed as kg per quadrant (kg quadrant-1). Next, physical tests (equatorial diameter (EqD), total fruit...
Tipo: Journal article Palavras-chave: Citriculture; Geostatistics; Spatial variability.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000300006
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Uniformity microsprinkler irrigation system using statistical quality control Ciência Rural
Andrade,Maurício Guy de; Boas,Marcio Antonio Vilas; Siqueira,Jair Antonio Cruz; Sato,Mireille; Dieter,Jonathan; Hermes,Eliane; Mercante,Erivelto.
ABSTRACT: The objective of this study was to evaluate the use of statistical quality control tools in the analysis of the uniformity of a microsprinkler irrigation system. For the analysis of irrigation Christiansen uniformity coefficient (CUC) and the distribution uniformity coefficient (DU) were statistically analyzed by means of the Shewhart control charts and process capability index (Cp). For the experiment 25 tests were carried out with a single micro sprinkler and subsequently seven different spacing between micro sprinklers were simulated. Control charts contributed to the diagnosis of the treatments to be under control and with satisfactory uniformity outcomes. Increase in process capability index was directly proportional to the average of CUC...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Christiansen uniformity coefficient; Distribution uniformity coefficient; Control charts; Process capability index.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400851
Registros recuperados: 23
Primeira ... 12 ... Última
 

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