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Registro Completo |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
03/03/2010 |
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Data da última atualização: |
30/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MELLO, J. C. C. B. S. DE; LINS, M. P. E.; GOMES, E. G. |
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Afiliação: |
JOÃO CARLOS CORREIRA BAPTISTA SOARES DE MELLO, UFF; MARCOS PEREIRA ESTELLITA LINS, UFRJ; ELIANE GONÇALVES GOMES, CNPM. |
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Título: |
Construction of a smoothed DEA frontier. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Pesquisa Operacional, v. 22, n. 2, p. 183-201, 2002. |
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Idioma: |
Inglês |
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Notas: |
(Edição especial de DEA e MCDA). |
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Conteúdo: |
It is known that the DEA multipliers model does not allow a unique solution for the weights. This is due to the absence of unique derivatives in the extreme-efficient points, which is a consequence of the piecewise linear nature of the frontier. In this paper we propose a method to solve this problem, consisting of changing the original DEA frontier for a new one, smooth (with continuous derivatives at every point) and closest to the original frontier. We present the theoretical development for the general case, exemplified with the particular case of the BCC model with one input and one output. The 3-dimensional problem is briefly discussed. Some uses of the model are summarised, and one of them, a new Cross-Evaluation model, is presented. |
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Palavras-Chave: |
Fronteira suavizada; Método de Ritz; Razões de compensação. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/121444/1/2595.pdf
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Marc: |
LEADER 01297naa a2200193 a 4500
001 1659555
005 2015-03-30
008 2002 bl uuuu u00u1 u #d
100 1 $aMELLO, J. C. C. B. S. DE
245 $aConstruction of a smoothed DEA frontier.
260 $c2002
500 $a(Edição especial de DEA e MCDA).
520 $aIt is known that the DEA multipliers model does not allow a unique solution for the weights. This is due to the absence of unique derivatives in the extreme-efficient points, which is a consequence of the piecewise linear nature of the frontier. In this paper we propose a method to solve this problem, consisting of changing the original DEA frontier for a new one, smooth (with continuous derivatives at every point) and closest to the original frontier. We present the theoretical development for the general case, exemplified with the particular case of the BCC model with one input and one output. The 3-dimensional problem is briefly discussed. Some uses of the model are summarised, and one of them, a new Cross-Evaluation model, is presented.
653 $aFronteira suavizada
653 $aMétodo de Ritz
653 $aRazões de compensação
700 1 $aLINS, M. P. E.
700 1 $aGOMES, E. G.
773 $tPesquisa Operacional$gv. 22, n. 2, p. 183-201, 2002.
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Registro original: |
Embrapa Territorial (CNPM) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
05/07/1994 |
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Data da última atualização: |
05/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BARBOSA, H. M.; CARNEIRO, J. E. de S.; VIEIRA, C. |
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Afiliação: |
HELIO MORAIS BARBOSA, UFV; JOSE EUSTAQUIO DE SOUZA CARNEIRO, CNPAF; CLIBAS VIEIRA, UFV. |
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Título: |
Ethyl methanesulfonate - induced seedcoat color mutants in Phaseolus vulgaris L. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Revista Brasileira de Genética, v. 11, n. 1, p. 123-128, mar. 1988. |
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ISSN: |
0100-8455 |
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Idioma: |
Inglês |
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Conteúdo: |
Germinating seeds of a high yielding black bean (Phaseolus vulgaris L.) cultivar were treated with O (con trol), 0.0625, 0.125, 0.25 and O .5% (v/v) buffered ethyl methanesulfonate (EMS) solutions with the purpose 01' exploring the possibility 01' inducing seedcoat color mu tations. The highest frequency of mutations was induced by 0.25% EMS. The results indicate that EMS-induced genetic modifications can readily change the seedcoat color 01' the cultivar used to different hues of brown. |
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Thesagro: |
Feijão; Indução; Melhoramento Genético Vegetal; Mutação; Phaseolus Vulgaris. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/200938/1/CNPAF-1988-rbg.pdf
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Marc: |
LEADER 01114naa a2200217 a 4500
001 1195901
005 2022-12-05
008 1988 bl uuuu u00u1 u #d
022 $a0100-8455
100 1 $aBARBOSA, H. M.
245 $aEthyl methanesulfonate - induced seedcoat color mutants in Phaseolus vulgaris L.
260 $c1988
520 $aGerminating seeds of a high yielding black bean (Phaseolus vulgaris L.) cultivar were treated with O (con trol), 0.0625, 0.125, 0.25 and O .5% (v/v) buffered ethyl methanesulfonate (EMS) solutions with the purpose 01' exploring the possibility 01' inducing seedcoat color mu tations. The highest frequency of mutations was induced by 0.25% EMS. The results indicate that EMS-induced genetic modifications can readily change the seedcoat color 01' the cultivar used to different hues of brown.
650 $aFeijão
650 $aIndução
650 $aMelhoramento Genético Vegetal
650 $aMutação
650 $aPhaseolus Vulgaris
700 1 $aCARNEIRO, J. E. de S.
700 1 $aVIEIRA, C.
773 $tRevista Brasileira de Genética$gv. 11, n. 1, p. 123-128, mar. 1988.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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Status |
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