Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados AgEcon (57) Infoteca-e (6) Ciência Rural (6) PAB (6) Electron. J. Biotechnol. (5) Genet. Mol. Biol. (5) Ciencia e Investigación Agraria (4) R. Bras. Zootec. (4) Rev. Ciênc. Agron. (3) Colegio de Postgraduados (3) Acta Botanica (3) BABT (3) Scientia Agricola (3) REA (3) Agronomy (2) Thai Agricultural (2) CIGR Journal (2) Chilean J. Agric. Res. (2) ArchiMer (2) BJM (2) Mais... Autor Davidova, Sophia (3) Ratinger, Tomas (3) ALMEIDA, M. M. T. B. (2) Arfini, Filippo (2) BARIONI, L. G. (2) Banterle, Alessandro (2) Barcellos,Júlio Otávio Jardim (2) Canozzi,Maria Eugênia Andrighetto (2) Carraresi, Laura (2) Curtiss, Jarmila (2) Darvishzadeh,Reza (2) FASIABEN, M. do C. R. (2) Fodor, Monika (2) GREGO, C. R. (2) Gorton, Matthew (2) Gyau, Amos (2) Hakki,Erdogan E (2) Horvath, Agnes (2) Kayis,Seyit A (2) MAIA, A. G. (2) Mais... Palavra-chave Cluster analysis (140) Agribusiness (13) Food Consumption/Nutrition/Food Safety (12) Principal component analysis (12) Consumer/Household Economics (11) Research Methods/ Statistical Methods (11) Agricultural and Food Policy (9) Community/Rural/Urban Development (9) Genetic diversity (9) Marketing (8) China (6) Factor analysis (6) Farm Management (6) Crop Production/Industries (5) Demand and Price Analysis (5) Multivariate analysis (5) Market segmentation (4) Molecular markers (4) Agricultural Finance (3) Conjoint analysis (3) Mais... Tipo do documento Info:eu-repo/semantics/article (54) Journal Article (26) Conference Paper or Presentation (23) Journal article (12) Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) (4) Working or Discussion Paper (4) Text (2) Thesis or Dissertation (2) Article (1) Collection (1) Documentos (INFOTECA-E) (1) Folhetos (1) Peer-Reviewed Synthesis (1) PhysicalObject (1) Presentation (1) Tesis (1) Mais... Ano 2022 (1) 2021 (1) 2020 (2) 2019 (6) 2018 (3) 2017 (5) 2016 (7) 2015 (4) 2014 (1) 2013 (10) 2012 (9) 2011 (21) 2010 (11) 2009 (15) 2008 (11) 2007 (7) 2006 (8) 2005 (5) 2004 (2) 2003 (1) Mais... País Brazil (60) United States (57) Chile (12) Mexico (3) China (2) France (2) Thailand (2) Canada (1) Japan (1) Mais... Idioma Inglês (120) Português (7) Espanhol (6) Alemão (2) Húngaro (2) Thailandês (2) Japonês (1) Mais...		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 140 Primeira ... 1 2 3 4 5 6 7 ... Última Caracterización morfológica y agronómica de once híbridos de Brachiaria ssp Colegio de Postgraduados Peralta Nava, Jorge Armando. La presente investigación se realizó en dos etapas para caracterizar y evaluar a once híbridos de Brachiaria spp. En la primera etapa se evaluó la producción y calidad de semilla en campo y laboratorio. En campo se utilizó un diseño de bloques al azar evaluándose el rendimiento de semilla ventilada (RDSV) y la densidad de tallos florales (DTF). Los híbridos LNN45 y HBA-69 obtuvieron los mayores RDSV (218.02 y 207.33 kg ha-1 respectivamente). En DTF los mejores híbridos fueron, HBA- 43 y HBA-73 (695 y 606.50 DTF/m2). No hubo una asociación entre RDSV y DTF, lo que hace del llenado de grano un atributo variable en este género. En laboratorio, se evaluó la semilla cosechada por método sudado (MCS) y método manual (MCM), en un diseño completamente... Tipo: Tesis Palavras-chave: Brachiaria spp.; Híbridos; Caracterización morfológica; Componentes principales; Conglomerados; Maestría; Producción de semillas; Hybrids; Morphologic characterization; Principal; Components; Cluster analysis. Ano: 2009 URL: http://hdl.handle.net/10521/1255 Caracterización morfológica, estudio molecular y determinación de azúcares en zapote mamey (Pouteria sapota Jacq. H.E. Moore & Stearn). Colegio de Postgraduados Arellano Durán, Nely. La importancia del zapote mamey radica en el valor comercial de sus frutos por su uso en la alimentación humana debido a sus características organolépticas y nutricionales. México es centro de origen de este frutal, distribuyéndose en 15 estados de la república, su propagación ha sido por semilla por lo cual existe gran diversidad genética. El objetivo del presente estudio fue hacer la caracterización morfológica de 12 selecciones provenientes de Puebla, Veracruz y Yucatán, así como el estudio molecular mediante la técnica AFLP`s incluyendo siete materiales de Guerrero y cuatro especies de la familia de las Sapotáceas (Pouteria campechiana, P. fossicola, Manilkara zapota y Chrisophyllum cainito. También se determinó el perfil y concentración de azúcares en... Palavras-chave: Pouteria sapota; Diversidad; Análisis de conglomerados; Marcadores moleculares; Azúcares; Estaquiosa; Diversity; Cluster analysis; Molecular markers; Sugar; Stachyose; Fruticultura; Maestría. Ano: 2012 URL: http://hdl.handle.net/10521/1091 Aplicación de métodos multivariados para la tipificación y caracterización de almacenes de maíz en México. Colegio de Postgraduados Ortíz Rosales, Miguel Angel. El principal cultivo en producción, importaciones y consumo en México es el maíz, su correcto almacenamiento permite hacerlo disponible en todo momento, incide directamente en la seguridad alimentaria del país, permite hacer más competitiva la oferta y es un detonante de ingresos y empleos. Por otro lado, la oferta de maíz en México se encuentra dispersa por todo el país y entre propietarios con distintos niveles de desarrollo; en consecuencia, las características de los almacenes pueden obedecer a varios factores. En este contexto, las políticas dirigidas a eficientar el sistema de almacenamiento de maíz en México deben considerar dicha heterogeneidad. En este estudio se propone una tipología de almacenes de maíz que permite agrupar características en... Palavras-chave: Seguridad alimentaria; Análisis de componentes principales (ACP); Análisis clúster; Economía; Doctorado; Food security; Principal component Analysis (PCA); Cluster analysis. Ano: 2012 URL: http://hdl.handle.net/10521/1780 Cultural Ecosystem Services: A Literature Review and Prospects for Future Research Ecology and Society Cultural ecosystem services constitute a growing field of research that is characterized by an increasing number of publications from various academic disciplines. We conducted a semiquantitative review of publications explicitly dealing with cultural ecosystem services. Our aims were: (1) to provide an overview of the current state of research, (2) to classify the diversity of research approaches by identifying clusters of publications that address cultural ecosystem services in similar ways, and (3) to highlight some important challenges for the future of cultural ecosystem services research. We reviewed 107 publications and extracted 20 attributes describing their type and content, including methods, scales, drivers of change, and trade-offs between... Tipo: Peer-Reviewed Synthesis Palavras-chave: Aesthetic values; Bundling; CES valuation; Cluster analysis; Cultural heritage; Cultural landscapes; Drivers of change; Intangible benefits; Landscape values; Nonuse values; Policy implications; Recreation and ecotourism. Ano: 2013 Molecular description and similarity relationships among native germplasm potatoes (Solanum tuberosum ssp. tuberosum L.) using morphological data and AFLP markers Electron. J. Biotechnol. Solano Solis,Jaime; Morales Ulloa,Daniza; Anabalón Rodríguez,Leonardo. Chile is considered to be a sub-center of origin for the cultivated potato, with native and introduced genetic material coexisting in the country. Thus, the different varieties present in Chiloe Island are characterized by a rich diversity of forms, sizes, colours and phenological characteristics. In the present work, the level of polymorphism and the genetic relationship were studied by means of molecular markers using the amplified fragment length polymorphism (AFLP) technique and twenty-seven morphological characters. Twenty varieties of potatoes from the Chiloe Island were analyzed. The commercial variety Desirée and one specie from the Etuberosa series, Solanum fernandezianum, collected in the Juan Fernandez Island were included as controls. A... Tipo: Journal article Palavras-chave: Cluster analysis; Molecular markers; Solanum tuberosum ssp. tuberosum. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300011 Inter simple sequence repeats separate efficiently hemp from marijuana (Cannabis sativa L.) Electron. J. Biotechnol. Hakki,Erdogan E; Kayis,Seyit A; Pinarkara,Emine; Sag,Ayla. Cannabis sativa L. is a multiple-use plant that provides raw material for the production of seed oil, natural fiber for textiles, automotive and pulp industries. It has also been used in insulating boards, ropes, varnishes, animal feed, and as medicinal agents. Cannabis has potential to be used for phytoremediation: however, its cultivation is strictly controlled due to its psychoactive nature and usage in producing drugs such as marijuana, and hashish. In this study, psychoactive type Cannabis samples, which were seized from 23 different locations of Turkey, and nine hemp type Cannabis accessions, as well as an unknown accession were used. Our interest was to identify the genetic relatedness of the seized samples and to separate drug and hemp type plants.... Tipo: Journal article Palavras-chave: Cluster analysis; Hemp; ISSR; Marijuana; Principle coordinate analysis. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400010 Cotton genetic diversity study by AFLP markers Electron. J. Biotechnol. Murtaza,Naveed. Amplified fragmentlength polymorphism (AFLP) markers have been used to ascertain the intensity of inherent diversity and relatedness in cotton (Gossypium spp.) plants. The effectiveness of this method to distinguish inter and intra specific difference in cotton could be handy in cultivar recognition and in marker assisted parental selection tool for plant breeders. Twenty cotton cultivars belonging to Gossypium hirsutum L., and G. arborium L. from the Pakistan and US origin were used for AFLP based genetic diversity estimates. The objective of this study was to assess the level of genetic variation among some cotton cultivars belonging to the old and new world species of cotton. Four EcoRI-MseI primer-pair combinations were used forthe AFLP analysis. The... Tipo: Journal article Palavras-chave: AFLP; Cluster analysis; Cotton; Genetic diversity; PCR. Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400013 RAPD analysis of seized marijuana (Cannabis sativa L.) in Turkey Electron. J. Biotechnol. Pinarkara,Emine; Kayis,Seyit A; Hakki,Erdogan E; Sag,Ayla. Cannabis sativa L. is a multiple-use plant. However, its cultivation is strictly controlled due to its psychoactive nature and usage in producing drugs such as marijuana, and hashish. In this study, psychoactive type Cannabis samples, which were seized from 29 different locations of Turkey, were used. Interests were to identify the genetic relatedness of the seized samples and to partition molecular variance between and within populations. Randomly Amplified Polymorphic DNAs were employed for analysis based on single plant material and bulked samples of them. Data were analysed via cluster and principal coordinate analyses (PCoA). Analysis of molecular variance (AMOVA) was performed to obtain variations between and within populations. Cannabis accessions... Tipo: Journal article Palavras-chave: AMOVA; Cluster analysis; Individualization of seized marijuana; Principle coordinate analysis; Randomly amplified polymorphic DNA; UPGMA. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000100005 Assessment of genetic diversity and relationships among Osmanthus fragrans cultivars using AFLP markers Electron. J. Biotechnol. Yuan,Wang Jun; Han,Yuan Ji; Dong,Mei Fang; Shang,Fu De. This study was conducted to reveal genetic diversity among 100 Osmanthus fragrans cultivars using amplified fragment length polymorphism (AFLP) markers. Eight AFLP primer combinations produced a total of 443 polymorphic fragments with an average of 64 per primer combination. The percentage of polymorphic bands (86.81%), the resolving power (Rp) (32.71) and the PIC values (0.331) showed the efficiency of used primer combinations. The revealed AFLP makers were effective in distinguishing all the cultivars considered. Cluster analysis were performed to assess patterns of diversity among cultivars and showed the abundant genetic diversity. The overall distribution pattern of molecular variation suggested that 93.33% of the total genetic variance was within the... Tipo: Journal article Palavras-chave: AFLP marker; Cluster analysis; Genetic diversity; Osmanthus fragrans. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000100002 PHYSICAL ANALYSIS OF REGIONALIZED FLOW AS AN AID IN THE IDENTIFICATION OF HYDROLOGICALLY HOMOGENEOUS REGIONS REA Calegario,Arthur T.; Pruski,Fernando F.; Ribeiro,Rayssa B.; Ramos,Maria C. A.; Rego,Fernando S.. ABSTRACT Regionalization is an important technique for estimating the flow of hydrographic sections with a lack of data. First, it is necessary to identify hydrologically homogeneous regions (HHRs), which are commonly validated via statistical analyses. Because this step is understood to be subjective, studies that contribute to a greater reliability in identifying regions are needed. In this context, the objective was to evaluate the inclusion of a physical analysis of the average regionalized flow rates as an aid to identify HHRs. The groupings were defined on the basis of geographical convenience methods and cluster analysis. For the assessment of regionalized flows, six statistical indices were used with a physical analysis that was performed via a... Tipo: Info:eu-repo/semantics/article Palavras-chave: Regionalization; Long-term average streamflow; Planning and management of water resources; Cluster analysis; Geographical convenience. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300334 Soil penetration resistance analysis by multivariate and geostatistical methods REA Medina,Cecilia; Camacho-Tamayo,Jesús H.; Cortés,César A.. The penetration resistance (PR) is a soil attribute that allows identifies areas with restrictions due to compaction, which results in mechanical impedance for root growth and reduced crop yield. The aim of this study was to characterize the PR of an agricultural soil by geostatistical and multivariate analysis. Sampling was done randomly in 90 points up to 0.60 m depth. It was determined spatial distribution models of PR, and defined areas with mechanical impedance for roots growth. The PR showed a random distribution to 0.55 and 0.60 m depth. PR in other depths analyzed showed spatial dependence, with adjustments to exponential and spherical models. The cluster analysis that considered sampling points allowed establishing areas with compaction problem... Tipo: Info:eu-repo/semantics/article Palavras-chave: Compaction; Cluster analysis; Principal components; Andisol. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100010 Multivariate statistical analysis to support the minimum streamflow regionalization REA Elesbon,Abrahão A. A.; Silva,Demetrius D. da; Sediyama,Gilberto C.; Guedes,Hugo A. S; Ribeiro,Carlos A. A. S.; Ribeiro,Celso B. de M.. ABSTRACT This study aimed to develop a methodology based on multivariate statistical analysis of principal components and cluster analysis, in order to identify the most representative variables in studies of minimum streamflow regionalization, and to optimize the identification of the hydrologically homogeneous regions for the Doce river basin. Ten variables were used, referring to the river basin climatic and morphometric characteristics. These variables were individualized for each of the 61 gauging stations. Three dependent variables that are indicative of minimum streamflow (Q7,10, Q90 and Q95). And seven independent variables that concern to climatic and morphometric characteristics of the basin (total annual rainfall – Pa; total semiannual rainfall... Tipo: Info:eu-repo/semantics/article Palavras-chave: Principal component analysis; Cluster analysis; Homogeneous regions. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500838 Wavelet-domain elastic net for clustering on genomes strains Genet. Mol. Biol. Ferreira,Leila Maria; Sáfadi,Thelma; Ferreira,Juliano Lino. Abstract We propose to evaluate genome similarity by combining discrete non-decimated wavelet transform (NDWT) and elastic net. The wavelets represent a signal with levels of detail, that is, hidden components are detected by means of the decomposition of this signal, where each level provides a different characteristic. The main feature of the elastic net is the grouping of correlated variables where the number of predictors is greater than the number of observations. The combination of these two methodologies applied in the clustering analysis of the Mycobacterium tuberculosis genome strains proved very effective, being able to identify clusters at each level of decomposition. Tipo: Info:eu-repo/semantics/article Palavras-chave: Elastic net; Genome; GC-content; Cluster analysis; Wavelet transform. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000500884 Genetic variability in Brazilian wheat cultivars assessed by microsatellite markers Genet. Mol. Biol. Schuster,Ivan; Vieira,Elisa Serra Negra; Silva,Glacy Jaqueline da; Franco,Francisco de Assis; Marchioro,Volmir Sérgio. Wheat (Triticum aestivum) is one of the most important food staples in the south of Brazil. Understanding genetic variability among the assortment of Brazilian wheat is important for breeding. The aim of this work was to molecularly characterize the thirty-six wheat cultivars recommended for various regions of Brazil, and to assess mutual genetic distances, through the use of microsatellite markers. Twenty three polymorphic microsatellite markers (PMM) delineated all 36 of the samples, revealing a total of 74 simple sequence repeat (SSR) alleles, i.e. an average of 3.2 alleles per locus. Polymorphic information content (PIC value) calculated to assess the informativeness of each marker ranged from 0.20 to 0.79, with a mean of 0.49. Genetic distances among... Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Germplasm; Cultivar characterization; Cluster analysis; Molecular markers. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300019 Cytogenetic study of the genus Cousinia (Asteraceae, section Serratuloideae) in Iran Genet. Mol. Biol. Sheidai,Masoud; Mehdigholi,Kazem; Ghahreman,Ahmad; Attar,Farideh. Meiotic studies of ploidy level, chromosome paring and chiasma frequency were performed on 11 Cousinia (Asteraceae) species of the section Serratuloideae. The diploid number of the species studied was 2n = 2x = 24 and 26 so these species possess two different basic numbers (x = 12 or 13), a phenomenon common to other sections of the genus. The chromosome numbers of 9 species are reported here for the first time. When the 2n = 24 and 2n = 26 species were subjected to cluster analysis based on relative meiotic characters two different clusters were formed indicating their distinctness. Our data support the results obtained from morphometry, anatomy, pollen morphology and molecular studies of the genus Cousinia. Tipo: Info:eu-repo/semantics/article Palavras-chave: Cousinia; Chiasma frequency; Cluster analysis; Meiosis. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100022 Molecular characterization and genetic structure of the Nero Siciliano pig breed Genet. Mol. Biol. Guastella,Anna Maria; Criscione,Andrea; Marletta,Donata; Zuccaro,Antonio; Chies,Luigi; Bordonaro,Salvatore. Nero Siciliano is an autochthonous pig breed that is reared mainly in semi-extensive systems in northeastern Sicily. Despite its economic importance and well-appreciated meat products, this breed is currently endangered. Consequently, an analysis of intra-breed variability is a fundamental step in preserving this genetic resource and its breeding system. In this work, we used 25 microsatellite markers to examine the genetic composition of 147 unrelated Nero Siciliano pigs. The total number of alleles detected (249, 9.96 per locus) and the expected heterozygosity (0.708) indicated that this breed had a high level of genetic variability. Bayesian cluster analysis showed that the most likely number of groups into which the sample could be partitioned was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster analysis; Coancestry; Intra-breed genetic variation; Microsatellites; Nero Siciliano pig breed. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400010 Genetic differentiation and geographical Relationship of Asian barley landraces using SSRs Genet. Mol. Biol. Naeem,Rehan; Dahleen,Lynn; Mirza,Bushra. Genetic diversity in 403 morphologically distinct landraces of barley (Hordeum vulgare L. subsp. vulgare) originating from seven geographical zones of Asia was studied using simple sequence repeat (SSR) markers from regions of medium to high recombination in the barley genome. The seven polymorphic SSR markers representing each of the chromosomes chosen for the study revealed a high level of allelic diversity among the landraces. Genetic richness was highest in those from India, followed by Pakistan while it was lowest for Uzbekistan and Turkmenistan. Out of the 50 alleles detected, 15 were unique to a geographic region. Genetic diversity was highest for landraces from Pakistan (0.70 ± 0.06) and lowest for those from Uzbekistan (0.18 ± 0.17). Likewise,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster analysis; Genetic diversity; Geographical differentiation; Hordeum vulgare; Principal component analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200017 Divergência genética em uma população de melhoramento de cajueiro. Infoteca-e MELO, D. S.; MAIA, M. C. C.; VIDAL NETO, F. das C.; BARROS, L. de M.; CRUZ, C. D.; OLIVEIRA, L. C. de; ARAÚJO, L. B. DE; MEDINA, L. M.. A seleção de genitores com ampla dissimilaridade genética é condição fundamental para obtenção de híbridos com maiores efeitos heteróticos. O objetivo deste trabalho foi avaliar a divergência genética de progênies de cajueiro-comum, pertencentes à população de melhoramento de meios-irmãos, e identificar grupos superiores e dissimilares para as variáveis agronômicas. Tipo: Folhetos Palavras-chave: Análise de agrupamento; Plant Genetic Improvement; Anacardium Occidentale; Melhoramento Genético Vegetal; Cluster analysis; Cashew fruit. Ano: 2022 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144111 Technological profile of beef cattle farms in Brazilian biomes. Infoteca-e FASIABEN, M. do C. R.; ALMEIDA, M. M. T. B.; MAIA, A. G.; OLIVEIRA, O. C. de; COSTA, F. P.; BARIONI, L. G.; DIAS, F. R. T.; MOREIRA, J. M. M. A. P.; SENA, A. L. dos S.; SANTOS, J. C. dos; LAMPERT, V. do N.; OLIVEIRA, P. P. A.; ABREU, U. G. P. de; GREGO, C. R.. Abstract - Beef production in Brazil is based on a great diversity of production systems. Despite the increasing in recent years, productivity is still low, giving space to technological intensification. The present study used special tabulations of Brazilian Census of Agriculture - 2006 to describe the predominant beef cattle systems, with emphasis on technological variables. Factor analysis and clustering techniques were used together, by biome, covering a universe of 124 thousand farms, 94 million heads of cattle and 86 million hectares of pasture. The results highlight the productivity differences among regions and farms, outlining the farm profiles per biome. Such results can be helpful to support research and technologies transfer, as well as public... Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Bioma; Análise multivariada; Análise fatorial; Análise de cluster; Produção de bovinos; Tipificação de municípios; Sistemas de produção; Tipologia de fazendas; Factorial analysis; Farms and Farming Systems; Farming systems; Farm typology; Multivariate analysis; Cluster analysis. Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1127930 Uma estratégia para auxiliar a identificação de portfólios por meio de mineração de textos. Infoteca-e MOURA, M. F.; EVANGELISTA, S. R. M.; MASSRUHÁ, S. M. F. S.; SANTOS, T. T.. Neste trabalho utilizou-se uma estratégia com base em mineração de textos para fornecer uma indicação dos atuais portfólios da Embrapa Informática Agropecuária. Para tanto, utilizaram-se, como dados, os projetos liderados por essa unidade nos últimos anos, de 2004 a 2010. A esses dados aplicou-se um processo de extração semiautomática do conhecimento, utilizando vocabulário controlado, filtragem estatística de atributos, agrupamento hierárquico de documentos, descrição única dos agrupamentos e várias interações usuários do processo. Os resultados obtidos foram satisfatórios, tendo passado apenas por validação subjetiva, mostrando que o processo pode ser aplicado a dados semelhantes. Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Mineração de textos; Portfólios; Aprendizado de máquina; Seleção de atributos; Agrupamento de documentos; Descrição de agrupamentos; Text mining; Cluster analysis. Ano: 2011 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/920208 Registros recuperados: 140 Primeira ... 1 2 3 4 5 6 7 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco