Encontrados 28 documentos, a visualizar página 1 de 3
Generating fuzzy rules by learning from olive tree transpiration measurement - ...
Siqueira, J.M.; Paço, T.A.; Silvestre, J.C.; Santos, F.L.; Falcão, A.O.; Pereira, L.S.The present study aims at developing an intelligent system of automating data analysis and prediction embedded in a fuzzy logic algorithm (FAUSY) to capture the relationship between environmental vari- ables and sap flow measurements (Granier method). Environmental thermal gradients often interfere with Granier sap flow measurements since this method uses heat as a tracer, thus introducing a bias in transpirati...
Water requirements and footprint of a super intensive olive grove under Mediter...
Paço, T.A.; Nogueira, A.M.; Silvestre, J.C.; Gonzalez, L.F.; Santos, F.L.; Pereira, L.S.Abstract The water footprint of a product can be described as the volume of freshwater used to produce it, associated to a geographic and temporal resolution. For crops, the water footprint relates crop water requirements and yield. The components of water footprint, blue, green and grey water footprints, refer to the volumes of respectively, surface and groundwater, rainfall, and water required to assimilate p...
Pegada hídrica de um olival super-intensivo sob clima mediterrânico, utilizando...
Nogueira, A.M.; Paço, T.A; Silvestre, J.C.; Mota, M.; Gonzalez, L.F.; Santos, F.L.; Pereira, L.S.A pegada hídrica de uma cultura representa o volume de água necessário para produzir, relacionando as necessidades hídricas da cultura com a produção. As suas componentes, pegadas hídricas azul, verde e cinzenta, referem-se respectivamente aos volumes de água superficial e subterrânea, precipitação e de água necessária para assimilar a poluição utilizados pela cultura. A determinação das pegadas hídricas azul e...
Are drought occurrence and severity aggravating ? A study on SPI drought class ...
Moreira, E.E.; Mexia, J.T.; Pereira, L.S.Abstract. Long time series (95 to 135 yr) of the 12-month time scale Standardized Precipitation Index (SPI) relative to 10 locations across Portugal were studied with the aim of investigating if drought frequency and severity are changing through time. Considering four drought severity classes, time series of drought class transitions were computed and later divided into several sub-periods according to the len...
Climate trends and behaviour of drought indices based on precipitation and evap...
Paulo, A.A.; Rosa, R.D.; Pereira, L.S.Distinction between drought and aridity is crucial to understand water scarcity processes. Drought indices are used for drought identification and drought severity characterisation. The Standardised Precipitation Index (SPI) and the Palmer Drought Severity Index (PDSI) are the most known drought indices. In this study, they are compared with the modified PDSI for Mediterranean conditions (MedPDSI) and the Stand...
Pegada hídrica de um olival super-intensivo sob clima mediterrânico utilizando ...
Nogueira, A.M.; Paço, T.A.; Silvestre, J.C.; Mota, M.; Gonzalez, L.F.; Santos, F.L.; Pereira, L.S.The water footprint of a crop is the volume of water that is necessary to produce, therefore relating crop water requirements and yield. The components of water footprint, blue, green and grey water footprints refer to the volumes of respectively, surface and groundwater, rainfall, and water required to assimilate pollution, which are used to produce the crop yield. Determining blue and green water footprints i...
Effects of 174 G/C polymorphism in the promoter region of the interleukin-6 gen...
Pereira,D.S.; Garcia,D.M.; Narciso,F.M.S.; Santos,M.L.A.S.; Dias,J.M.D.; Queiroz,B.Z.; Souza,E.R.; Nóbrega,O.T.; Pereira,L.S.M.We investigated the effect of -174 G/C single-nucleotide polymorphism in the promoter region of the IL6 gene on plasma IL-6 levels and muscle strength, and the relationship between IL-6 levels and muscle strength in elderly women. The sample consisted of 199 elderly residents (73.0 ± 7.8 years old) from rest homes and the community in Belo Horizonte, MG, Brazil. -174 G/C polymorphism was determined by direct se...
Necessidades de água e produtividade económica da rega de milho em condições de...
Rodrigues, G.C.; Paredes, P.; Rosa, R.D.; Silva, F.G.; Pereira, L.S.A identificação das necessidades de rega do milho, uma das principais culturas regadas em Portugal Continental, constitui uma medida de preparação para enfrentar as secas e a escassez de água. Definiram-se várias estratégias de rega com o objectivo de redução da procura de água de rega com impactos aceitáveis na produção. O modelo de balanço hídrico e de simulação de calendários de rega SIMDualKc, anteriormente...
Estimación de las necessidades hídricas de la papaya utilizando la aproximación...
Chaterlán, Y.; Paredes, P.; Rosa, R.; Herández, G.; López, T.; Pereira, L.S.The use of irrigation in the cultivation of papaya is increasing in recent years. Thus, there is the need for improved knowledge of the most appropriate irrigation scheduling practices to be adopted as well as the more adequate estimation of crop water requirements. With this objective, the simulation model SIMDualKc was adopted and calibrated. The model performs the calculation of crop evapotranspiration (ETc)...
MIRRIG: sistema de apoio à decisão para microrrega. Aplicação aos espaços verdes
Pedras, Celestina M.G.; Valin, Maria I.S.; Pereira, L. S.MIRRIG is a decision support system (DSS), developed to design and evaluation of microirrigation system under operation. This DSS comprise a database and the models: design and evaluation. The database contains information on emitters, pipes, soils, as well as plants and the systems under design. Design models allow creating and comparing a set of design alternatives based upon an integration of technical, econ...
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