We describe SICK-BR, a Brazilian Portuguese corpus annotated with inference relations and semantic relatedness between pairs of sentences. SICK-BR is a translation and adaptation of the original SICK, a corpus of English sentences used in several semantic evaluations. SICK-BR consists of around 10k sentence pairs annotated for neutral/contradiction/entailment relations and for semantic relatedness, using a 5 point scale. Here we describe the strategies used for the adaptation of SICK, which preserve its original inference and relatedness relation labels in the SICK-BR Portuguese version. We also discuss some issues with the original corpus and how we might deal with them.
Atualmente os recursos hídricos têm importância acentuada devido ao desenvolvimento econômico do Brasil e do mundo, com a multiplicidade em seus usos, como por exemplo, o abastecimento público, irrigação de culturas, geração de energia hidroelétrica, dessedentação de animais, entre outros. A fim de minimizar a pressão hídrica, instrumentos de gestão vêm sendo desenvolvidos para apoiar o planejamento e a gestão a nível de bacia hidrográfica. Sendo assim, o presente artigo teve como objetivo geral trazer alternativas de otimização do aproveitamento hídrico superficial no alto curso do rio Uberaba, Triângulo Mineiro. Verificou-se que a substituição da base de cálculo da vazão Q7,10 anual para mensal apresentou aumento da vazão disponível para a maior parte do ano, sendo o mais significativo no mês de fevereiro, com 2.488% de aumento na disponibilidade hídrica, enquanto o mês de outubro apresentou 47,22% a menos quando comparado com a Q7,10 anual. Dentre os critérios para concessão de outorga estudados, o critério de 50% da Q7,10 mensal apresentou maior aumento na disponibilidade hídrica.
Aim To demonstrate the importance of calibration in mathematical modeling of self-purification in lotic environments, this study simulated the behavior of various parameters in a river with average annual flows between 4.0 and 32.0 m3.s-1, in a segment downstream from the entry of treated wastewater from a sewage treatment station (average monthly flow of 2.1 m3.s-1). Methods Numerical solution by finite difference of the advection-diffusion equation was used to study the dispersion and to quantify and monitor the evolution over time of the parameters DO, BOD5, Ptotal, NH3, NO3- and the levels of the heavy metals cadmium, chromium, copper, lead and zinc. The longitudinal behavior of the water quality parameters simulated by calibrating the state variables was compared with the behavior of the same parameters simulated via state variables available in the literature. The sensitivity of the state variables was also analyzed. Results The calibration process led to good fits between the simulated and actual data for all the parameters analyzed. On the other hand, the comparison of the water quality model using calibrated state variables with the model based on state variables obtained in the literature revealed inconsistencies regarding the parameters DO, Ptotal, ammonia, nitrate and all the heavy metals. Conclusions Considering the wide threshold ranges of the state variables in the literature and the dearth of studies on calibrating the coefficient of decay and quantifying the release of heavy metals by bottom sediment, this study can serve as a base for future investigations in lotic environments with similar hydraulic and water quality characteristics.
This paper compares the use of one-dimensional (1-D) and three-dimensional (3-D) numerical models to simulate the flow of a vertical-slot fishway. Prior to their application, the models are validated by comparing the predicted data with experimental data from a physical model. Then the numerical models are applied to calculate four critical hydraulic design parameters of vertical-slot fishways, i.e., flow speed, water depth, turbulent kinetic energy, and energy dissipation rate. Furthermore, the authors developed rating curves for flow rate and energy dissipation rate in terms of flow depth using data from the 1-D model. These curves have great utility for the operation of the vertical-slot fishway studied. The results indicate that 1-D modeling can be a useful tool for preliminary conservative design arrangements of vertical-slot fishways, and that 3-D modeling can be a useful tool to enable accurate representation of the critical hydraulic design parameters and selection of the most appropriate design.
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