Depth Estimation
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. PREDICTIVE MODELS OF WATER APPLICATION AND DISTRIBUTION EFFICIENCY IN CONVENTIONAL SPRINKLING
ABSTRACT Correct determinations of distribution (Ed) and application (EA) efficiencies allow adequate estimations of the gross irrigation depth. This study aimed: i) to determine the distribution efficiency using the Christiansen uniformity coefficient (CUC) in a sprinkler irrigation system under different weather conditions and working pressures; ii) to com
Eng. Agríc.. Publicado em: 2020-02
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2. Obesity: A Risk Marker or an Independent Risk Factor for Coronary Artery Disease?
ABSTRACT Correct determinations of distribution (Ed) and application (EA) efficiencies allow adequate estimations of the gross irrigation depth. This study aimed: i) to determine the distribution efficiency using the Christiansen uniformity coefficient (CUC) in a sprinkler irrigation system under different weather conditions and working pressures; ii) to com
Int. J. Cardiovasc. Sci.. Publicado em: 2020-02
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3. NUMERICAL AND EXPERIMENTAL INVESTIGATION OF AIR-WATER SYSTEM TO SIMULATE BUBBLE DYNAMICS IN LIQUID SODIUM POOL
Abstract The dynamics of rising bubbles in a liquid sodium pool plays a significant role in the estimation of the radiological source term during anticipated transients and normal operation of a fast reactor. Sodium is chemically reactive with air and water. Therefore, carrying out experiments using sodium on a reactor scale level requires extra precautions.
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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4. Application of quality by design approach in RP-HPLC method development for simultaneous estimation of saxagliptin and dapagliflozin in tablet dosage form
A simple, sensitive, precise, accurate and robust high performance liquid chromatographic method has been developed for simultaneous estimation of saxagliptin (SAXA) and dapagliflozin (DAPA) in pharmaceutical formulation. Design of experiments (DoE) was applied for multivariate optimization of the experimental conditions of RP-HPLC method. Risk assessment wa
Braz. J. Pharm. Sci.. Publicado em: 24/10/2019
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5. Leaf area index and radiation extinction coefficient of a coffee canopy under variable drip irrigation levels
ABSTRACT. The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the
Acta Sci., Agron.. Publicado em: 23/09/2019
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6. Estimation of precompression stress in an Ultisol cultivated with sugarcane
RESUMO Propriedades compressivas do solo são frequentemente utilizadas para entender o processo de compactação. Alternativamente a ensaios laboratoriais, funções de pedo-transferência têm sido usadas para estimar o comportamento mecânico em função de parâmetros físicos do solo. Este trabalho objetivou examinar o impacto da densidade (BD) e do con
Rev. bras. eng. agríc. ambient.. Publicado em: 06/05/2019
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7. Estimation of Sulfentrazone Leaching in Isolated Application and in Mixture with Glyphosate
RESUMO: Como alternativa de controle de biótipos resistentes, os agricultores têm recorrido ao uso de herbicidas que possuem atividade residual no solo e têm boa ação em pré-emergência. Uma das misturas mais utilizadas no Brasil é a de sulfentrazone + glyphosate. Quanto um herbicida tem ação em pré-emergência, pequena lixiviação de suas molécu
Planta daninha. Publicado em: 08/04/2019
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8. Experimentation and modeling of soil evaporation in underground dam in a semiarid region
RESUMO Nas regiões semi-áridas, as altas taxas de evaporação interferem na disponibilidade de água no solo. Normalmente, é difícil medir e modelar a evaporação devido à complexidade dos métodos disponíveis, ao baixo teor de umidade do solo e à baixa concentração de vapor de água no ar. Isso também pode dificultar o monitoramento e a simula�
RBRH. Publicado em: 14/02/2019
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9. GLOBAL SENSITIVITY ANALYSIS METHODS APPLIED TO HYDROLOGIC MODELING WITH THE SAC-SMA MODEL
ABSTRACT This study aimed to use global sensitivity analysis (GSA) methods to evaluate the sensitivity of the SAC-SMA hydrologic model parameters in the estimation of daily flows of the Piracicaba river basin. The study was carried out in three sections of flow monitoring of the Piracicaba river basin, with an area of 5,304.0 km2 and located in the State of
Eng. Agríc.. Publicado em: 2019-02
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10. Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed
RESUMO O método Curve Number (CN) é amplamente usado na predição do escoamento superficial a partir de eventos de chuva. No entanto, existem algumas incertezas no método tais como no uso da abstração inicial (λ) padrão igual a 0,2 e na escolha dos valores adequados de CN. Neste estudo, nós calculamos valores de λ e CN usando dados de chuva e vaz�
RBRH. Publicado em: 31/01/2019
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11. How accurate are pedotransfer functions for bulk density for Brazilian soils?
ABSTRACT: The aim of this study was to evaluate the performance of pedotransfer functions (PTFs) available in the literature to estimate soil bulk density (ρb) in different regions of Brazil, using different metrics. The predictive capacity of 25 PTFs was evaluated using the mean absolute error (MAE), mean error (ME), root mean squared error (RMSE), coeffic
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-01
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12. Estimating Sample Size of Soil Cone Index Profiles by Bootstrapping
ABSTRACT Measurements of the soil cone index are widely used to assess soil resistance to root penetration (SR) and to monitor the soil compaction status of agricultural fields. However, soil sampling for SR estimation is a rather challenging task in view of the high spatial and temporal variability of the soil. This study proposed a bootstrapping method to
Rev. Bras. Ciênc. Solo. Publicado em: 17/11/2017