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Registro Completo |
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
17/03/2016 |
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Data da última atualização: |
17/03/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
HOTT, M. C.; CARVALHO, L. M. T. de; ANTUNES, M. A. H.; ALVES, H. M. R.; ROCHA, W. S. D. da. |
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Afiliação: |
MARCOS CICARINI HOTT, CNPGL; LUÍS MARCELO TAVARES DE CARVALHO, UFLA/DCF; MAURO ANTONIO HOMEM ANTUNES, UFRRJ/DENG; HELENA MARIA RAMOS ALVES, SAPC; WADSON SEBASTIAO DUARTE DA ROCHA, CNPGL. |
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Título: |
Estimativa de expoentes de Hurst para séries temporais de imagens NDVI / MODIS em regiões de pastagens da Zona da Mata de Minas Gerais. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 17., 2015, João Pessoa. Anais... São José dos Campos: INPE, 2015. p. 4065-4072 , 2015 |
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Idioma: |
Português |
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Conteúdo: |
The Zona da Mata region in Minas Gerais State is configured in a traditional dairy production chain, whose grasslands have subtle dynamics in their phenology, and currently there is a strong concern regarding degradation and vegetative development trends. The Hurst exponents (H) are a potential tool to describe the evolution scale of time series, sensitive to short- and long-term memory. This study was aimed at developing an algorithm in the GIS that presents reliable results of the Hurst exponents for NDVI from MODIS imagery, using binary blocks method applied to R/S analysis (range rescaled) in the Gretl, an econometrics and time series software. We produced H values identical to those estimated H for time series of pixels extracted from the satellite imagery dataset, processed in the Gretl. In order to estimate and evaluate the area of occurrence of the H exponents classes for imagery over time, we performed a processing highlighting the slightly trend of low sustainability of grasslands (H class 0.52 to 0.65), with 833,768 ha (68.71%), and moderate sustainability or persistence (H class 0.65 to 0.70), with 162,068 ha. We emphasized the fact that the estimated class between 0.37 and 0.52 resulted in a considerable area of grasslands, with about 135,000 ha, possibly indicating that this region faces remarkable changes, such as degradation, crop rotation, fallow or others land use changes. Despite the long processing time to estimate H, we highlight the usefulness of this methodology for detection of change trends in the short- and long-term periods. MenosThe Zona da Mata region in Minas Gerais State is configured in a traditional dairy production chain, whose grasslands have subtle dynamics in their phenology, and currently there is a strong concern regarding degradation and vegetative development trends. The Hurst exponents (H) are a potential tool to describe the evolution scale of time series, sensitive to short- and long-term memory. This study was aimed at developing an algorithm in the GIS that presents reliable results of the Hurst exponents for NDVI from MODIS imagery, using binary blocks method applied to R/S analysis (range rescaled) in the Gretl, an econometrics and time series software. We produced H values identical to those estimated H for time series of pixels extracted from the satellite imagery dataset, processed in the Gretl. In order to estimate and evaluate the area of occurrence of the H exponents classes for imagery over time, we performed a processing highlighting the slightly trend of low sustainability of grasslands (H class 0.52 to 0.65), with 833,768 ha (68.71%), and moderate sustainability or persistence (H class 0.65 to 0.70), with 162,068 ha. We emphasized the fact that the estimated class between 0.37 and 0.52 resulted in a considerable area of grasslands, with about 135,000 ha, possibly indicating that this region faces remarkable changes, such as degradation, crop rotation, fallow or others land use changes. Despite the long processing time to estimate H, we highlight the usefulness of this m... Mostrar Tudo |
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Palavras-Chave: |
Expoentes de hurst; Hurst exponents; Serie temporal. |
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Thesagro: |
Pastagem. |
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Thesaurus Nal: |
Grasslands; Moderate resolution imaging spectroradiometer. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/141358/1/Estimativa-de-expoentes-de-hurst.pdf
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Marc: |
LEADER 02427nam a2200229 a 4500
001 2041272
005 2016-03-17
008 2015 bl uuuu u00u1 u #d
100 1 $aHOTT, M. C.
245 $aEstimativa de expoentes de Hurst para séries temporais de imagens NDVI / MODIS em regiões de pastagens da Zona da Mata de Minas Gerais.$h[electronic resource]
260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 17., 2015, João Pessoa. Anais... São José dos Campos: INPE, 2015. p. 4065-4072 $c2015
520 $aThe Zona da Mata region in Minas Gerais State is configured in a traditional dairy production chain, whose grasslands have subtle dynamics in their phenology, and currently there is a strong concern regarding degradation and vegetative development trends. The Hurst exponents (H) are a potential tool to describe the evolution scale of time series, sensitive to short- and long-term memory. This study was aimed at developing an algorithm in the GIS that presents reliable results of the Hurst exponents for NDVI from MODIS imagery, using binary blocks method applied to R/S analysis (range rescaled) in the Gretl, an econometrics and time series software. We produced H values identical to those estimated H for time series of pixels extracted from the satellite imagery dataset, processed in the Gretl. In order to estimate and evaluate the area of occurrence of the H exponents classes for imagery over time, we performed a processing highlighting the slightly trend of low sustainability of grasslands (H class 0.52 to 0.65), with 833,768 ha (68.71%), and moderate sustainability or persistence (H class 0.65 to 0.70), with 162,068 ha. We emphasized the fact that the estimated class between 0.37 and 0.52 resulted in a considerable area of grasslands, with about 135,000 ha, possibly indicating that this region faces remarkable changes, such as degradation, crop rotation, fallow or others land use changes. Despite the long processing time to estimate H, we highlight the usefulness of this methodology for detection of change trends in the short- and long-term periods.
650 $aGrasslands
650 $aModerate resolution imaging spectroradiometer
650 $aPastagem
653 $aExpoentes de hurst
653 $aHurst exponents
653 $aSerie temporal
700 1 $aCARVALHO, L. M. T. de
700 1 $aANTUNES, M. A. H.
700 1 $aALVES, H. M. R.
700 1 $aROCHA, W. S. D. da
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Registro original: |
Embrapa Café (CNPCa) |
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Origem |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
10/09/1996 |
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Data da última atualização: |
13/08/2021 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
BARROS, N. N.; MESQUITA, R. C. M.; ARAUJO, M. R. de. |
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Afiliação: |
Nelson Nogueira Barros, CNPC; Roberto César Magalhães Mesquita, CNPC; Marcelo Renato de Araújo, CNPC. |
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Título: |
Suplementação alimentar de cabras Anglo-nubiana, no semi-árido. I. Época chuvosa. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 33., 1996, Fortaleza. Anais... Fortaleza: Sociedade Brasileira de Zootecnia, 1996. v. 3. p. 267-269. |
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Idioma: |
Português |
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Conteúdo: |
Este trabalho teve a finalidade de verificar o efeito da suplementacao alimentar em cabras Anglo-Nubiana, em pastejo, durante a epoca chuvosa no semi-arido. |
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Palavras-Chave: |
Brasil; Ceará; Época chuvosa; Pasture feeding; Raça Anglo-Nubiana; Rainy season; Supplementary feeding. |
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Thesagro: |
Cabra leiteira; Caprino; Pastagem nativa; Produção leiteira; Suplemento alimentar. |
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Thesaurus NAL: |
Brazil; Goats; Milk production; Wet season. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/48538/1/AAC-Suplementacao-alimentar.pdf
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Marc: |
LEADER 01174nam a2200325 a 4500
001 1514381
005 2021-08-13
008 1996 bl uuuu u00u1 u #d
100 1 $aBARROS, N. N.
245 $aSuplementação alimentar de cabras Anglo-nubiana, no semi-árido. I. Época chuvosa.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 33., 1996, Fortaleza. Anais... Fortaleza: Sociedade Brasileira de Zootecnia, 1996. v. 3. p. 267-269.$c1996
520 $aEste trabalho teve a finalidade de verificar o efeito da suplementacao alimentar em cabras Anglo-Nubiana, em pastejo, durante a epoca chuvosa no semi-arido.
650 $aBrazil
650 $aGoats
650 $aMilk production
650 $aWet season
650 $aCabra leiteira
650 $aCaprino
650 $aPastagem nativa
650 $aProdução leiteira
650 $aSuplemento alimentar
653 $aBrasil
653 $aCeará
653 $aÉpoca chuvosa
653 $aPasture feeding
653 $aRaça Anglo-Nubiana
653 $aRainy season
653 $aSupplementary feeding
700 1 $aMESQUITA, R. C. M.
700 1 $aARAUJO, M. R. de
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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