Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 39
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A Composite Fuzzy Indicator for Assessing Farm Household Potential for Non-farm Income Diversification AgEcon
Fritzsch, Jana.
European politicians encourage the income diversification of rural households through various measures. Although being aware of farm households’ potential for non-farm income diversification seems important for finely-targeting such policy measures, no attempt has thus far been made to summarise the various determinants of income diversification in a single figure. This contribution aims to close this gap. A composite fuzzy indicator that measures farm household potential for non-farm income diversification is developed and applied to 1,053 farm households in Bulgaria, Hungary, Poland, Romania, and Slovenia. The indicator summarises the incentives of and capacities for non-farm income diversification on the individual household member level, and on the...
Tipo: Conference Paper or Presentation Palavras-chave: Composite indicator; Fuzzy logic; Rural non-farm income diversification; Transition countries; Consumer/Household Economics; C65; J24; Q12; R23.
Ano: 2011 URL: http://purl.umn.edu/114349
Imagem não selecionada

Imprime registro no formato completo
An object-oriented framework for virtual diagnosis. Repositório Alice
MASSRUHA, S. M. F. S.; DUTRA, J. P.; CRUZ, S. A. B. da; SANDRI, S.; WAINER, J.; MORANDI, M. A. B..
This paper presents an object-oriented approach to support, on the web, an integrated framework for diagnosis, investigation and treatment of disorders (diseases, computer faults, etc). In this framework, called Fuzzy Covering Theory (FCT), the knowledge is basically modeled through causal associations between objects and inference is abductive. In this new approach, it was necessary to specify the classes model using object - oriented methodology and the knowledge base model that was a flat file in Prolog. These models are discussed in this paper as well as the advantages and limitations of this new approach.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Diagnose; Lógica difusa; Aplicação web; Diagnosis; Abductive inference; Web application; Diagnóstico; Fuzzy logic.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/2924
Imagem não selecionada

Imprime registro no formato completo
Clustering approaches and ensembles applied in the delineation of management classes in precision agriculture. Repositório Alice
SPERANZA, E. A.; CIFERRI, R. R.; CIFERRI, C. D. de A..
Abstract. This paper describes an experiment performed using different approaches for spatial data clustering, aiming to assist the delineation of management classes in Precision Agriculture (PA). These approaches were established from the partitional clustering algorithm Fuzzy c-Means (FCM), traditionally used in this context, and from the hierarchical clustering algorithm HACCSpatial, especially designed for this PA task. We also performed experiments using traditional ensembles approaches from the literature, evaluating their behavior to achieve consensus solutions from individual clusterings obtained from features splitting or running one of the abovementioned algorithms. Results showed some differences between FCM and HACC-Spatial, mainly for the...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Fuzzy c-Means algorithm; Spatial hierarchical clustering algorithm; Agricultura de precisão; Precision agriculture; Cluster analysis; Fuzzy logic; Spatial data.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079181
Imagem não selecionada

Imprime registro no formato completo
DiagData: uma arquitetura para geração de sistemas inteligentes para predição de doenças de plantas. Repositório Alice
RICCIOTTI, R. F.; MASSRUHÁ, S. M. F. S..
Este trabalho descreve a arquitetura de um sistema desenvolvido para utilizar a grande quantidade de dados e informações geradas pela Embrapa na área de manejo e controle de doenças de plantas, por meio de seus experimentos e publicações. No contexto deste trabalho, técnicas de mineração de dados foram utilizadas de modo que o conhecimento extraído destes dados possa ser utilizado para antever a ocorrência de uma doença e evitar a sua disseminação.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mineração de dados; Modelagem fuzzy; DiagData; Árvore de decisão; Lógica fuzzy; Doença de planta; Databases; Fuzzy logic.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/868629
Imagem não selecionada

Imprime registro no formato completo
Embedded system in Arduino platform with Fuzzy control to support the grain aeration decision Ciência Rural
Szesz Junior,Albino; Monteiro Junior,Marcos; Dias,Ariangelo Hauer; Mathias,Ivo Mário; Conti,Giuvane.
ABSTRACT: Aeration is currently the most commonly used technique to improve the drying and storage of grain, depending on temperature and water content of the grain, as of the temperature and relative humidity of the outside air. In order to monitor temperature and humidity of the grain mass, it is possible to have a network of sensors in the cells of both internal and external storage. Use of artificial intelligence through Fuzzy theory, has been used since the 60s and enables their application on various forms. Thus, it is observed that the aeration of grain in function of representing a system of controlled environment can be studied in relation to the application of this theory. Therefore, the aim of this paper is to present an embedded Fuzzy control...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arduino; Agriculture; Mathematical model; Fuzzy logic; Grain aeration.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001101917
Imagem não selecionada

Imprime registro no formato completo
Estimating the average length of hospitalization due to pneumonia: a fuzzy approach BJMBR
Nascimento,L.F.C.; Rizol,P.M.S.R.; Peneluppi,A.P..
Exposure to air pollutants is associated with hospitalizations due to pneumonia in children. We hypothesized the length of hospitalization due to pneumonia may be dependent on air pollutant concentrations. Therefore, we built a computational model using fuzzy logic tools to predict the mean time of hospitalization due to pneumonia in children living in São José dos Campos, SP, Brazil. The model was built with four inputs related to pollutant concentrations and effective temperature, and the output was related to the mean length of hospitalization. Each input had two membership functions and the output had four membership functions, generating 16 rules. The model was validated against real data, and a receiver operating characteristic (ROC) curve was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air pollutants; Fuzzy logic; Pneumonia; Particulate matter; Sulfur dioxide.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014001100977
Imagem não selecionada

Imprime registro no formato completo
EVALUATING ALTERNATIVE FARMING SYSTEMS: A FUZZY MADM APPROACH AgEcon
Marks, Leonie A.; Dunn, Elizabeth G..
This paper develops a decision support method that integrates measures of achievement in the economic, environmental, and social aspects of farming. The decision support method combines multiple attribute decision making (MADM) with fuzzy logic. The fuzzy MADM model fully ranks decision alternatives relative to the preferences of decision makers and overcomes several problems inherent in other MADM approaches. It is concluded that fuzzy MADM can improve decision making on the farm.
Tipo: Conference Paper or Presentation Palavras-chave: Fuzzy logic; Fuzzy sets; Multiple attribute decision making; MADM; Institutional and Behavioral Economics; Research Methods/ Statistical Methods.
Ano: 1999 URL: http://purl.umn.edu/21642
Imagem não selecionada

Imprime registro no formato completo
Explorando o uso da Teoria Fuzzy no software R: estudo de caso para avaliar a força de infecção da Anemia Infecciosa Equina (AIE). Repositório Alice
SERVIDONE, G.; TERNES, S.; ROSSI, M..
A Anemia Infecciosa Equina (AIE) é uma doença grave no Pantanal Sul-Mato-Grossense, e uma das possíveis vias de infecção é a iatrogênica. A obtenção de dados do processo infeccioso no campo que permitam estimar a força de infecção da transmissão da AIE é uma etapa onerosa, pois envolve altos custos e o bem estar animal. Para contornar a escassez de tais dados, implementou-se um sistema baseado em regras fuzzy para mimetizar a força de infecção correspondente ao reúso de possíveis agulhas contaminadas nos cavalos. Este parâmetro epidemiológico foi gerado por diferentes t-normas, verificando-se sua importância nos respectivos resultados do modelo matemático.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Teoria de conjuntos fuzzy; Lógica fuzzy; Força de infecção; Anemia infecciosa equina; Epidemiologia; Fuzzy logic.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1038863
Imagem não selecionada

Imprime registro no formato completo
Fuzzy logic and geostatistics in studying the fertility of soil cultivated with the rubber tree Rev. Ciênc. Agron.
Lima,Julião Soares de Sousa; Silva,Samuel de Assis; Santos,Adilson Almeida dos; Altoé,Marcelo Soares.
ABSTRACT Knowledge of the spatial variability of soil attributes is an aid to soil management. The aim of this study was to apply fuzzy logic and geostatistics in defining the spatial variability of soil fertility, in soil cultivated with the rubber tree. Soil samples from the 0-0.20 m and 0.20-0.40 m layers were collected in a stratified random sampling grid, with a shortest distance of 6 m, for a total of 60 points. The chemical attributes were P, K, Ca, Mg, BS, CEC and V. The spatial dependence of the attributes was determined, and the maps were constructed using ordinary kriging interpolation. The interpolated values were transformed into degrees of pertinence (FI), with the lower and upper limits previously defined, using an increasing model. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil management; Map of fertility; Fuzzy logic.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200228
Imagem não selecionada

Imprime registro no formato completo
FUZZY MODEL FOR PREDICTING CLOACAL TEMPERATURE OF BROILER CHICKENS UNDER THERMAL STRESS REA
Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Campos,Alessandro T.; Lourençoni,Dian; Bahuti,Marcelo.
ABSTRACT Broiler chickens submitted to different intensities and durations of thermal stress are subject to variation in cloacal temperature and, consequently, to a decrease in performance. Given the complexity of these interactions, artificial intelligence is a useful methodology for decision-making. Thus, this study aimed to assess and predict, by means of a fuzzy model, the cloacal temperature of broiler chickens submitted to thermal stress in the second week of life, with varying durations and intensities, in climatized wind tunnels. Mamdani's inference and defuzzification methods by means of the center of gravity were used. One hundred and twenty rules were elaborated. The developed fuzzy model was used to predict the cloacal temperature of broiler...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiological response; Thermal environment; Mathematical modeling; Fuzzy logic.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000100018
Imagem não selecionada

Imprime registro no formato completo
Fuzzy modeling in the prediction of climate indices and productive performance of quails kept in climate chamber REA
MARQUES,JORDÂNIO I.; LOPES NETO,JOSÉ P.; LOPES,FERNANDA F. DE M.; FURTADO,DERMEVAL A.; ARAÚJO,TIAGO G. P..
ABSTRACT With the demand in the production at large-scale food, confinement of animals has become a necessity of the productive process because of the increase in production capacity and optimization of the spaces reserved for creations. In this context, the aim of this study was the development and validation of models using fuzzy logic for predicting climate indices and productive performance of European quails kept in a climatic chamber. The model developed was analyzed from two points of view; the first one took into account the prediction of climate indexes where the input variables were the temperature (°C) and relative humidity (%) of the air. In the second, related to the prediction of productive performance, the input variables were air...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coturniculture; Fuzzy logic; Productivity; Environmental quality.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000400604
Imagem não selecionada

Imprime registro no formato completo
Fuzzy modeling of broiler performance, raised from 1 to 21 days, subject to heat stress REA
Abreu,Lucas H. P.; Yanagi Junior,Tadayuki; Fassani,Édison J.; Campos,Alessandro T.; Lourençoni,Dian.
ABSTRACT Given the need to obtain systems to better control broiler production environment, we performed an experiment with broilers from 1 to 21 days, which were submitted to different intensities and air temperature durations in conditioned wind tunnels and the results were used for validation of afuzzy model. The model was developed using as input variables: duration of heat stress (days), dry bulb air temperature (°C) and as output variable: feed intake (g) weight gain (g) and feed conversion (g.g-1). The inference method used was Mamdani, 20 rules have been prepared and the defuzzification technique used was the Center of Gravity. A satisfactory efficiency in determining productive responses is evidenced in the results obtained in the model...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fuzzy logic; Animal environment; Poultry.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000600967
Imagem não selecionada

Imprime registro no formato completo
FUZZY MODELING OF THE EFFECTS OF IRRIGATION AND WATER SALINITY IN HARVEST POINT OF TOMATO CROP. PART I: DESCRIPTION OF THE METHOD REA
Viais Neto,Daniel dos S.; Cremasco,Camila P.; Bordin,Deyver; Putti,Fernando F.; Silva Junior,Josué F.; Gabriel Filho,Luís R. A..
ABSTRACT It was used statistical techniques for the evaluation of agricultural experiments, but there are mathematical theories that allow finer adjustments, highlighting among them, the fuzzy logic. The objective of the study was characterizing a method of fuzzy modeling from an agronomic experiment. For this study it was used data from an experiment conducted at the School of Agriculture of São Paulo State University (UNESP) in Botucatu-SP. The system input variables based in fuzzy rules were soil water tension and doses of water salinity, being defined three fuzzy sets. The output variables was elected from the biometric and productivity analysis that showed statistically significant differences, namely, plant height, stem diameter, leaf area, green...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fuzzy logic; Drought; Salt stress; Crop management.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300294
Imagem não selecionada

Imprime registro no formato completo
FUZZY MODELING OF THE EFFECTS OF IRRIGATION AND WATER SALINITY IN HARVEST POINT OF TOMATO CROP. PART II: APPLICATION AND INTERPRETATION REA
Viais Neto,Daniel dos S.; Cremasco,Camila P.; Bordin,Deyver; Putti,Fernando F.; Silva Junior,Josué F.; Gabriel Filho,Luís R. A..
ABSTRACT Tomato, the most popular greenery, is characterized by being a demanding crop in water and when in prolonged and severe drought, has limitations in its growth and reduction in productivity. In addition, this vegetable is affected by excess salinity in the water, which causes leaf wilting, apex and leaf edges burn until their death. Such effects generally are studied using statistical analysis, but there are mathematical theories that allow finer adjustments, highlighting among them, the fuzzy logic. The objective of this study was to evaluate the effects on the growth and yield of hybrid tomato from different water tensions in the soil and different salinity doses in the irrigation at 120 days after sowing using fuzzy modeling. It was used data...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fuzzy logic; Hydro potential; Drought; Salt stress.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300305
Imagem não selecionada

Imprime registro no formato completo
Fuzzy subset approach in coupled population dynamics of blowflies Biol. Res.
CASTANHO,MARÍA J.P.; MAGNAGO,KARINE F; BASSANEZI,RODNEY C; GODOY,WESLEY A.C..
This paper is a study on the population dynamics of blowflies employing a density-dependent, non-linear mathematical model and a coupled population formalism. In this study, we investigated the coupled population dynamics applying fuzzy subsets to model the population trajectory, analyzing demographic parameters such as fecundity, survival, and migration. The main results suggest different possibilities in terms of dynamic behavior produced by migration in coupled populations between distinct environments and the rescue effect generated by the connection between populations. It was possible to conclude that environmental heterogeneity can play an important role in blowfly metapopulation systems. The implications of these results for population dynamics of...
Tipo: Journal article Palavras-chave: Fuzzy logic; Blowflies; Coupled populations; Population biology.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200016
Imagem não selecionada

Imprime registro no formato completo
Índice de qualidade de bacia - ferramenta de gestão de recursos naturais em nível de bacia hidrográfica. Repositório Alice
CALHEIROS, D. F.; ROCHE, K. F.; MASSRUHÁ, S. M. F. S.; DIAS, F. A.; SOUZA, G. F.; MONTANHOLI, M. C.; BARBOSA, D. S.; FERREIRA, L. M.; DORES, E. F. G. C.; SILVA, E. C.; SOUZA, C. F.; COLLISCHONN, W.; PAZ, A. R.; RISSO, A.; SORIANO, B. M. A..
O objetivo deste trabalho é diagnosticar os principais problemas ambientais que afetam as bacias formadoras do Pantanal e auxiliar na definição de estratégias de gestão por meio do uso de indicadores, tendo como estudo de caso a sub-bacia do rio Miranda?MS, um ecossistema considerado de qualidade de média a baixa.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Indicadores de sustentabilidade; Gestão de recursos hídricos; Lógica fuzzy; Bacia Hidrográfica; Watersheds; Fuzzy logic.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/915013
Imagem não selecionada

Imprime registro no formato completo
Indigenous Past Climate Knowledge as Cultural Built-in Object and Its Accuracy Ecology and Society
Leclerc, Christian; CIRAD, UMR AGAP, Montpellier, France; christian.leclerc@cirad.fr; Mwongera, Caroline ; Montpellier SupAgro, Montpellier, France; carolmwongera@yahoo.com.
In studying indigenous climate knowledge, two approaches can be envisioned. In the first, traditional knowledge is a cultural built-in object; conceived as a whole, its relevance can be assessed by referring to other cultural, economic, or technical components at work within an indigenous society. In the second, the accuracy of indigenous climate knowledge is assessed with western science knowledge used as an external reference. However, assessing the accuracy of indigenous climate knowledge remains a largely untapped area. We aim to show how accurate the culturally built indigenous climate knowledge of extreme climatic events is, and how amenable it is to fuzzy logic. A retrospective survey was carried out individually and randomly among 195 Eastern...
Tipo: Peer-Reviewed Reports Palavras-chave: Climate change; Drought; Ecological anthropology; Fuzzy logic; Kenya; Meru; Traditional ecological knowledge.
Ano: 2013
Imagem não selecionada

Imprime registro no formato completo
Knowledge-based digital soil mapping for predicting soil properties in two representative watersheds Scientia Agricola
Menezes,Michele Duarte de; Silva,Sérgio Henrique Godinho; Mello,Carlos Rogério de; Owens,Phillip Ray; Curi,Nilton.
ABSTRACT: The estimation of soil physical and chemical properties at non-sampled areas is valuable information for land management, sustainability and water yield. This work aimed to model and map soil physical-chemical properties by means of knowledge-based digital soil mapping approach as a study case in two watersheds representative of different physiographical regions in Brazil. Two watersheds with contrasting soil-landscape features were studied regarding the spatial modeling and prediction of physical and chemical properties. Since the method uses only one value of soil property for each soil type, the way of choosing typical values as well the role of land use as a covariate in the prediction were tested. Mean prediction error (MPE) and root mean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ANOVA test; Spatial variability; Fuzzy logic; Typical values.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000200144
Imagem não selecionada

Imprime registro no formato completo
Lógica fuzzy aplicada à gerência de distribuição de carga em um grid de computadores. Repositório Alice
NASCIMENTO, G. G. do; ROMANI, L. A. S..
Os avanços tecnológicos têm levado a um aumento no volume de dados científicos disponíveis, seja por meio da coleta feita por diferentes senso- res, como por modelos matemáticos que geram inúmeras saídas distintas. Especialmente nas pesquisas em mudanças climáticas, os especialistas têm que lidar com esse grande volume de dados, o que extrapola a capacidade do ser humano de cálculo e análise. Desta forma, o apoio computacional se torna fundamental para alavancar as pesquisas em diferentes áreas. Em busca de uma solução economicamente viável e ecologicamente correta para este problema, e que ainda pudesse ser compartilhada por diversos projetos na empresa, a equipe do projeto SCAF adotou a computação em grade.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Lógica fuzzy; Grid computacional; Computação em grade; Fuzzy logic.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/954512
Imagem não selecionada

Imprime registro no formato completo
Modelagem do efeito ecotoxicológico de misturas de agrotóxicos em organismos aquáticos utilizando números fuzzy. Repositório Alice
PEIXOTO, M. S.; CANTÃO, R. F.; JONSSON, C. M.; PARAIBA, L. C..
Práticas agrícolas que usam vários agrotóxicos podem contaminar águas superficiais e subterrâneas com concentrações de misturas de agrotóxicos que podem acarretar sérios riscos à qualidade das águas e à saúde dos organismos aquáticos que nelas habitam. Concentrações de misturas de agrotóxicos na água podem agravar os efeitos tóxicos em organismos aquáticos, quando comparadas com os efeitos tóxicos de concentrações individuais de cada agrotóxico componente da mistura. O objetivo deste trabalho foi desenvolver um modelo matemático que utiliza números fuzzy para classificar efeitos ecotoxicológicos em organismos aquáticos de concentrações de misturas de agrotóxicos ocorrendo na água, classificando-os em antagônicos, aditivos ou sinérgicos e também para...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Número fuzzy; Sinergismo; Antagonismo; Agrotóxico; Toxidez; Fauna aquática; Modelo matemático; Pesticides; Toxicity; Fuzzy logic.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1037188
Registros recuperados: 39
Primeira ... 12 ... 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

Valid HTML 4.01 Transitional