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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
23/12/1998 |
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Data da última atualização: |
20/01/2020 |
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Autoria: |
NASCIMENTO, M. A.; CUNHA, A. C. R. da. |
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Afiliação: |
MARIO A. NASCIMENTO, CNPTIA; ADRIANO C. R. DA CUNHA, IC/UNICAMP. |
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Título: |
An experiment stemming non-traditional text. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: STRING PROCESSING AND INFORMATION RETRIEVAL: A SOUTH AMERICAN SYMPOSIUM, 1998, Santa Cruz de la Sierra. Proceedings... Los Alamitos: IEEE Computer Society, 1998. |
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Páginas: |
p. 75-80. |
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DOI: |
10.1109/SPIRE.1998.712985 |
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Idioma: |
Inglês |
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Conteúdo: |
Stemming is a technique which aims to extract common suffixes of words. Thus, words which are literally different but have a commom stem, may be abstracted by their common stem. The underlying goal when using a stemming techniques is to improve recall, at the possible expense of precision loss. A well known technique for stemming text is Porter's algorithm, which is based on a set of rules extracted from the English language. In this paper, we argue that such an algorithm it is not efficient for non-traditional texts, e.g., one made up mainly of medical terms. We thus investigate the use of a technique, called Peak-and-Plateau, which is based on tries, and compare it to Porter's algorithm. Our experiments have shown that using Porter's algorithm or none at all makes no difference as far as precision and recall goes. On the other hand, using the Peak-and Plateau technique we improved recall by about 15% and decreased precision by an average of 40%. Moreover, it compressed the original text by 40% and the inverted file by 45%. |
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Palavras-Chave: |
Recuperação de informação; Stemming. |
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Thesaurus Nal: |
Information retrieval. |
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Categoria do assunto: |
-- |
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Marc: |
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001 1006876
005 2020-01-20
008 1998 bl uuuu u00u1 u #d
024 7 $a10.1109/SPIRE.1998.712985$2DOI
100 1 $aNASCIMENTO, M. A.
245 $aAn experiment stemming non-traditional text.$h[electronic resource]
260 $aIn: STRING PROCESSING AND INFORMATION RETRIEVAL: A SOUTH AMERICAN SYMPOSIUM, 1998, Santa Cruz de la Sierra. Proceedings... Los Alamitos: IEEE Computer Society$c1998
300 $ap. 75-80.
520 $aStemming is a technique which aims to extract common suffixes of words. Thus, words which are literally different but have a commom stem, may be abstracted by their common stem. The underlying goal when using a stemming techniques is to improve recall, at the possible expense of precision loss. A well known technique for stemming text is Porter's algorithm, which is based on a set of rules extracted from the English language. In this paper, we argue that such an algorithm it is not efficient for non-traditional texts, e.g., one made up mainly of medical terms. We thus investigate the use of a technique, called Peak-and-Plateau, which is based on tries, and compare it to Porter's algorithm. Our experiments have shown that using Porter's algorithm or none at all makes no difference as far as precision and recall goes. On the other hand, using the Peak-and Plateau technique we improved recall by about 15% and decreased precision by an average of 40%. Moreover, it compressed the original text by 40% and the inverted file by 45%.
650 $aInformation retrieval
653 $aRecuperação de informação
653 $aStemming
700 1 $aCUNHA, A. C. R. da
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Registro original: |
Embrapa Agricultura Digital (CNPTIA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
15/01/2019 |
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Data da última atualização: |
15/01/2019 |
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Tipo da produção científica: |
Folder/Folheto/Cartilha |
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Autoria: |
MENKIR, A.; PALACIOS-ROJAS, N.; ALAMU, O.; PAES, M. C. D.; DHLIWAYO, T.; MAZIYA-DIXON, B.; MENGESHA, W.; NDHLELA, T.; GUIMARAES, P. E. de O.; PIXLEY, K.; ROCHEFORD, T. |
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Afiliação: |
MARIA CRISTINA DIAS PAES, CNPMS; PAULO EVARISTO DE O GUIMARAES, CNPMS. |
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Título: |
Vitamin A-biofortified maize: exploiting native genetic variation for nutrient enrichment. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Bonn: The Crop Trust, 2018. |
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Páginas: |
4 p. |
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Série: |
(Science Brief: Biofortification, 2). |
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Idioma: |
Inglês |
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Palavras-Chave: |
Milho biofortificado. |
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Thesagro: |
Milho; Nutriente; Variação Genética. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190670/1/Vitamin-A-Science-Brief.pdf
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Marc: |
LEADER 00826nam a2200289 a 4500
001 2104251
005 2019-01-15
008 2018 bl uuuu u0uu1 u #d
100 1 $aMENKIR, A.
245 $aVitamin A-biofortified maize$bexploiting native genetic variation for nutrient enrichment.$h[electronic resource]
260 $aBonn: The Crop Trust$c2018
300 $a4 p.
490 $a(Science Brief: Biofortification, 2).
650 $aMilho
650 $aNutriente
650 $aVariação Genética
653 $aMilho biofortificado
700 1 $aPALACIOS-ROJAS, N.
700 1 $aALAMU, O.
700 1 $aPAES, M. C. D.
700 1 $aDHLIWAYO, T.
700 1 $aMAZIYA-DIXON, B.
700 1 $aMENGESHA, W.
700 1 $aNDHLELA, T.
700 1 $aGUIMARAES, P. E. de O.
700 1 $aPIXLEY, K.
700 1 $aROCHEFORD, T.
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