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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
26/01/2016 |
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Data da última atualização: |
19/01/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SCHULTZ, B.; LUIZ, A. J. B.; SANCHES, I. D. A.; FORMAGGIO, A. R. |
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Afiliação: |
BRUNO SCHULTZ, INPE; ALFREDO JOSE BARRETO LUIZ, CNPMA; IEDA DEL'ARCO SANCHES, INPE; ANTONIO ROBERTO FORMAGGIO, INPE. |
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Título: |
Qualidade da classificação automática de imagens de sensoriamento remoto em trabalhos apresentados nas edições anteriores do SBSR. |
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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. 2357-2364. |
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Idioma: |
Português |
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Conteúdo: |
Abstract: A study has been carried out considering 18 years of papers published in the Simpósio Brasileiro de Sensoriamento Remoto (Brazilian Remote Sensing Symposium) related to the subject of satellite image classification. The aim of the study was to assess the degree of progress made in thematic mapping through developments in classification algorithms, different approaches (per-pixel or object-based) and methods (unsupervised and supervised). The result of 238 reported classification experiments were quantitatively analyzed through Kappa Index (KI) results. Several parameters were used to relate the experiments, as type of approach, method, number of samples and classes, used sensor system, etc. Overall, the results showed that no significant improvement was found in KI results after 18 years SBSR. The mean and KI values was found to be 0.71 and standard deviation of 0.14. Relations between KI results and number of class, type of approach and method could not be found. Thirty one percent of the experiments analyzed did not present sufficient methodological information, thus, they were excluded from the analysis. |
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Palavras-Chave: |
Automatic classification; Classificação automática; Meta-análise; SBSR. |
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Thesagro: |
Sensoriamento remoto. |
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Thesaurus Nal: |
Meta-analysis; Remote sensing. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/137813/1/2015AA002.pdf
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Marc: |
LEADER 01964nam a2200229 a 4500
001 2035208
005 2023-01-19
008 2015 bl uuuu u00u1 u #d
100 1 $aSCHULTZ, B.
245 $aQualidade da classificação automática de imagens de sensoriamento remoto em trabalhos apresentados nas edições anteriores do SBSR.$h[electronic resource]
260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 17., 2015, João Pessoa. Anais... São José dos Campos: INPE, 2015. p. 2357-2364.$c2364
520 $aAbstract: A study has been carried out considering 18 years of papers published in the Simpósio Brasileiro de Sensoriamento Remoto (Brazilian Remote Sensing Symposium) related to the subject of satellite image classification. The aim of the study was to assess the degree of progress made in thematic mapping through developments in classification algorithms, different approaches (per-pixel or object-based) and methods (unsupervised and supervised). The result of 238 reported classification experiments were quantitatively analyzed through Kappa Index (KI) results. Several parameters were used to relate the experiments, as type of approach, method, number of samples and classes, used sensor system, etc. Overall, the results showed that no significant improvement was found in KI results after 18 years SBSR. The mean and KI values was found to be 0.71 and standard deviation of 0.14. Relations between KI results and number of class, type of approach and method could not be found. Thirty one percent of the experiments analyzed did not present sufficient methodological information, thus, they were excluded from the analysis.
650 $aMeta-analysis
650 $aRemote sensing
650 $aSensoriamento remoto
653 $aAutomatic classification
653 $aClassificação automática
653 $aMeta-análise
653 $aSBSR
700 1 $aLUIZ, A. J. B.
700 1 $aSANCHES, I. D. A.
700 1 $aFORMAGGIO, A. R.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
05/05/2008 |
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Data da última atualização: |
28/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
RUEDA, B. L.; BLAKE, R. W.; NICHOLSON, C. F.; FOX, D. G.; TEDESCHI, L. O.; PELL, A. N.; FERNANDES, E. C. M.; VALENTIM, J. F.; CARNEIRO JUNIOR, J. M. |
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Afiliação: |
Instituto Nacional de Investigaciones Forestales y Agropecuarias; Cornell University; Cornell University; Cornell University; Cornell University; Cornell University; Cornell University; JUDSON FERREIRA VALENTIM, CPAF-AC; JOSE MARQUES CARNEIRO JUNIOR, CPAF-AC. |
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Título: |
Production and economic potentials of cattle in pasture-based systems of the Western Amazon region of Brazil. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Journal of Animal Science, Champaign, v. 81, n. 12, p. 2923-2937, 2003. |
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ISSN: |
0021-8812;(impresso) / 1525-3163 (online) |
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Idioma: |
Inglês |
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Conteúdo: |
Our objectives were to evaluate strategies to improve productivity and economic returns from beef and dual-purpose cattle systems based on data collected on one dual-purpose (Bos taurus × Bos indicus) and two beef (Nellore) cattle farms in the western Amazon region of Brazil. Forage chemical composition and digestion rates of carbohydrate fractions of grazed Brachiaria decumbens and Brachiaria brizantha cv. Marandu grasses and Pueraria phaseoloides (tropical kudzu) legume were measured monthly during a 9-mo period from the end of one dry season to the end of the subsequent rainy season. Measurements of milk and growth responses to grazing these forages were used to predict animal productivity responses to dietary nutrient availability throughout an annual cycle. The ME available for gain in our simulations was always more limiting than metabolizable protein. The predicted ME available for gain was 0.50 kg/d for steers grazing B. brizantha and 0.40 kg/d for finishing steers grazing B. decumbens. Grasses contained more NDF and neutral detergent insoluble protein and less ME (P < 0.05) in the rainiest months than in the less rainy season, which resulted in 20% less predicted weight gain by growing steers (P < 0.05). Supplementation with sorghum grain was required to increase milk production and growth by 25 or 50% per animal, respectively, but this strategy was less profitable than current forage-only diets. Greater productivity of land and labor from higher stocking indicated greater net margins for beef production, but not for milk. This study suggested that more intensive beef production by judicious fertilization of grass-legume pastures and greater stocking density is the preferable strategy for owners of these cattle systems to improve economic returns under current conditions. It also might help decrease the motivation for additional forest clearing. MenosOur objectives were to evaluate strategies to improve productivity and economic returns from beef and dual-purpose cattle systems based on data collected on one dual-purpose (Bos taurus × Bos indicus) and two beef (Nellore) cattle farms in the western Amazon region of Brazil. Forage chemical composition and digestion rates of carbohydrate fractions of grazed Brachiaria decumbens and Brachiaria brizantha cv. Marandu grasses and Pueraria phaseoloides (tropical kudzu) legume were measured monthly during a 9-mo period from the end of one dry season to the end of the subsequent rainy season. Measurements of milk and growth responses to grazing these forages were used to predict animal productivity responses to dietary nutrient availability throughout an annual cycle. The ME available for gain in our simulations was always more limiting than metabolizable protein. The predicted ME available for gain was 0.50 kg/d for steers grazing B. brizantha and 0.40 kg/d for finishing steers grazing B. decumbens. Grasses contained more NDF and neutral detergent insoluble protein and less ME (P < 0.05) in the rainiest months than in the less rainy season, which resulted in 20% less predicted weight gain by growing steers (P < 0.05). Supplementation with sorghum grain was required to increase milk production and growth by 25 or 50% per animal, respectively, but this strategy was less profitable than current forage-only diets. Greater productivity of land and labor from higher stocking indicated ... Mostrar Tudo |
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Palavras-Chave: |
Amazonia occidental; Amazônia Ocidental; Brachiaria brizantha cv Marandu; Ganado de carne; Leguminosas forrajeras; Pastos forrajeros; Producción de carne; Raza de bovinos Nelore; Rendimientos; Western amazon. |
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Thesagro: |
Brachiaria decumbens; Gado de corte; Gado Nelore; Gramínea forrageira; Kudzu; Leguminosa forrageira; Nutrição animal; Pastagem; Produção de carne; Pueraria phaseoloides; Rentabilidade. |
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Thesaurus NAL: |
Beef cattle; Forage grasses; Forage legumes; Meat production; Nellore; Yields. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/114934/1/17389.pdf
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Marc: |
LEADER 03516naa a2200553 a 4500
001 1508872
005 2021-07-28
008 2003 bl uuuu u00u1 u #d
022 $a0021-8812;(impresso) / 1525-3163 (online)
100 1 $aRUEDA, B. L.
245 $aProduction and economic potentials of cattle in pasture-based systems of the Western Amazon region of Brazil.$h[electronic resource]
260 $c2003
520 $aOur objectives were to evaluate strategies to improve productivity and economic returns from beef and dual-purpose cattle systems based on data collected on one dual-purpose (Bos taurus × Bos indicus) and two beef (Nellore) cattle farms in the western Amazon region of Brazil. Forage chemical composition and digestion rates of carbohydrate fractions of grazed Brachiaria decumbens and Brachiaria brizantha cv. Marandu grasses and Pueraria phaseoloides (tropical kudzu) legume were measured monthly during a 9-mo period from the end of one dry season to the end of the subsequent rainy season. Measurements of milk and growth responses to grazing these forages were used to predict animal productivity responses to dietary nutrient availability throughout an annual cycle. The ME available for gain in our simulations was always more limiting than metabolizable protein. The predicted ME available for gain was 0.50 kg/d for steers grazing B. brizantha and 0.40 kg/d for finishing steers grazing B. decumbens. Grasses contained more NDF and neutral detergent insoluble protein and less ME (P < 0.05) in the rainiest months than in the less rainy season, which resulted in 20% less predicted weight gain by growing steers (P < 0.05). Supplementation with sorghum grain was required to increase milk production and growth by 25 or 50% per animal, respectively, but this strategy was less profitable than current forage-only diets. Greater productivity of land and labor from higher stocking indicated greater net margins for beef production, but not for milk. This study suggested that more intensive beef production by judicious fertilization of grass-legume pastures and greater stocking density is the preferable strategy for owners of these cattle systems to improve economic returns under current conditions. It also might help decrease the motivation for additional forest clearing.
650 $aBeef cattle
650 $aForage grasses
650 $aForage legumes
650 $aMeat production
650 $aNellore
650 $aYields
650 $aBrachiaria decumbens
650 $aGado de corte
650 $aGado Nelore
650 $aGramínea forrageira
650 $aKudzu
650 $aLeguminosa forrageira
650 $aNutrição animal
650 $aPastagem
650 $aProdução de carne
650 $aPueraria phaseoloides
650 $aRentabilidade
653 $aAmazonia occidental
653 $aAmazônia Ocidental
653 $aBrachiaria brizantha cv Marandu
653 $aGanado de carne
653 $aLeguminosas forrajeras
653 $aPastos forrajeros
653 $aProducción de carne
653 $aRaza de bovinos Nelore
653 $aRendimientos
653 $aWestern amazon
700 1 $aBLAKE, R. W.
700 1 $aNICHOLSON, C. F.
700 1 $aFOX, D. G.
700 1 $aTEDESCHI, L. O.
700 1 $aPELL, A. N.
700 1 $aFERNANDES, E. C. M.
700 1 $aVALENTIM, J. F.
700 1 $aCARNEIRO JUNIOR, J. M.
773 $tJournal of Animal Science, Champaign$gv. 81, n. 12, p. 2923-2937, 2003.
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