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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
22/11/1995 |
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Data da última atualização: |
03/04/2019 |
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Autoria: |
LIU, J. W. H. |
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Afiliação: |
JOSEPH W. H. LIU, York University. |
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Título: |
A compact row storage scheme for cholesky factors using elimination trees. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
ACM Transactions on Mathematical Software, v. 12, n. 2, 1986, p. 127-148. |
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Idioma: |
Inglês |
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Conteúdo: |
For given sparse symmetric positive definite matrix, a compact row-oriented storage scheme for its cholesky factor is introduced. The scheme is based on the structure of an elimination tree defined for the given matrix. This new storage scheme has the distinct advantage of having the amount of overhead storage required for indexing always bounded by the number of nonzeros in the original matrix. The structural representation may be viewed as storing the minimal structure of the given matrix that will preserve the symbolic Cholesky factor. Experimental results on practical problems indicate that the amount of savings in overhead storage can be substantial when compared with Sherman's compressed column storage scheme. |
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Palavras-Chave: |
Algorithm analysis; Algoritmo; Cholesky factorization; Elimination tree; Sparse matrix; Sparse system. |
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Thesaurus Nal: |
Algorithms. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 01339naa a2200205 a 4500
001 1002125
005 2019-04-03
008 1986 bl uuuu u00u1 u #d
100 1 $aLIU, J. W. H.
245 $aA compact row storage scheme for cholesky factors using elimination trees.$h[electronic resource]
260 $c1986
520 $aFor given sparse symmetric positive definite matrix, a compact row-oriented storage scheme for its cholesky factor is introduced. The scheme is based on the structure of an elimination tree defined for the given matrix. This new storage scheme has the distinct advantage of having the amount of overhead storage required for indexing always bounded by the number of nonzeros in the original matrix. The structural representation may be viewed as storing the minimal structure of the given matrix that will preserve the symbolic Cholesky factor. Experimental results on practical problems indicate that the amount of savings in overhead storage can be substantial when compared with Sherman's compressed column storage scheme.
650 $aAlgorithms
653 $aAlgorithm analysis
653 $aAlgoritmo
653 $aCholesky factorization
653 $aElimination tree
653 $aSparse matrix
653 $aSparse system
773 $tACM Transactions on Mathematical Software$gv. 12, n. 2, 1986, p. 127-148.
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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Biblioteca |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
01/02/2010 |
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Data da última atualização: |
08/06/2018 |
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Autoria: |
GIMÉNEZ, G.; ANDRIOLO, J. L.; JANISCH, D.; COCCO, C.; DAL PICIO, M. |
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Afiliação: |
Gustavo Giménez, Instituto Nacional de Investigación Agropecuaria; Jerônimo Luiz Andriolo, Universidade Federal de Santa Maria/Departamento de Fitotecnia; Djeimi Janisch, Universidade Federal de Santa Maria/Departamento de Fitotecnia; Carine Cocco, Universidade Federal de Santa Maria/Departamento de Fitotecnia; Miriane Dal Picio, Universidade Federal de Santa Maria/Departamento de Fitotecnia. |
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Título: |
Cell size in trays for the production of strawberry plug transplants. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 7, p. 726-729, jul. 2009. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Tamanho das células em bandejas para produção de mudas de morangueiro. |
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Conteúdo: |
The objective of this work was to evaluate the influence of cell sizes used for strawberry plug production in trays compared to bare root transplants, regarding initial plant size, harvest timing, and total strawberry fruit yield. Plug transplants were produced from runner tips rooted in trays with cell sizes of 26.5, 50, 100 and 150 cm3 filled with Plantmax HA organic substrate. Bare root transplants (control) were produced in a closed soilless system using sand as substrate. A randomized block design was used, with four replicates with 16 plants per plot. Bare root transplants and plug transplants from 100-cm3 cells had larger crown and higher leaf and root dry mass. Early fruit yield was higher in plants propagated from plugs than in those propagated from bare root transplants. Spring and total fruit yield did not differ among treatments, with an average yield of 435 and 874 g per plant, respectively. Earlier strawberry fruit yield was obtained by using plug transplants, even from trays with small cells of 26.5 or 50 cm3. |
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Palavras-Chave: |
Fragaria anamassa; Plantio de raiz nua; Viveiro de planta. |
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Thesagro: |
Propagação vegetativa. |
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Thesaurus NAL: |
Fragaria ananassa; Plant propagation. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/106065/1/Cell-size.pdf
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Marc: |
LEADER 01858naa a2200253 a 4500
001 1631830
005 2018-06-08
008 2009 bl uuuu u00u1 u #d
100 1 $aGIMÉNEZ, G.
245 $aCell size in trays for the production of strawberry plug transplants.
260 $c2009
500 $aTítulo em português: Tamanho das células em bandejas para produção de mudas de morangueiro.
520 $aThe objective of this work was to evaluate the influence of cell sizes used for strawberry plug production in trays compared to bare root transplants, regarding initial plant size, harvest timing, and total strawberry fruit yield. Plug transplants were produced from runner tips rooted in trays with cell sizes of 26.5, 50, 100 and 150 cm3 filled with Plantmax HA organic substrate. Bare root transplants (control) were produced in a closed soilless system using sand as substrate. A randomized block design was used, with four replicates with 16 plants per plot. Bare root transplants and plug transplants from 100-cm3 cells had larger crown and higher leaf and root dry mass. Early fruit yield was higher in plants propagated from plugs than in those propagated from bare root transplants. Spring and total fruit yield did not differ among treatments, with an average yield of 435 and 874 g per plant, respectively. Earlier strawberry fruit yield was obtained by using plug transplants, even from trays with small cells of 26.5 or 50 cm3.
650 $aFragaria ananassa
650 $aPlant propagation
650 $aPropagação vegetativa
653 $aFragaria anamassa
653 $aPlantio de raiz nua
653 $aViveiro de planta
700 1 $aANDRIOLO, J. L.
700 1 $aJANISCH, D.
700 1 $aCOCCO, C.
700 1 $aDAL PICIO, M.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 44, n. 7, p. 726-729, jul. 2009.
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