Empirical Equations
Mostrando 25-36 de 103 artigos, teses e dissertações.
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25. Drying kinetics, structural characteristics and vitamin C retention of dedo-de-moça pepper (Capsicum baccatum) during convective and freeze drying
The main objective of this study was to evaluate the effect of the drying process on the vitamin C levels and physical properties of dedo-de-moça pepper. The drying kinetics and the structural properties were determined as a function of moisture content. Convective drying was compared with freeze-drying in terms of product quality, structural properties, re
Braz. J. Chem. Eng.. Publicado em: 2012-12
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26. Hope, perceived financial risk and propensity for indebtedness
Hope is an important construct in marketing, since it is an antecedent of important marketing variables, such as trust, expectation and satisfaction (MacInnis & Mello, 2005). Specifically, literature suggests that hope plays an important influence in risk perception (MacInnis & Mello, 2005) and propensity for indebtedness (Fleming, 2008). Thus, we aim to inv
BAR, Braz. Adm. Rev.. Publicado em: 2012-12
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27. Modeling, simulation and identification for control of tandem cold metal rolling
This paper describes a modeling procedure for tandem cold metal rolling, including the linearization step and system identification for control. The tandem cold rolling process is described by a mathematical model based on algebraic equations developed for control purposes and empirical relations. A state-space model is derived and detailed analyses in open
Mat. Res.. Publicado em: 23/10/2012
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28. Mathematical modeling of a three-phase trickle bed reactor
The transient behavior in a three-phase trickle bed reactor system (N2/H2O-KCl/activated carbon, 298 K, 1.01 bar) was evaluated using a dynamic tracer method. The system operated with liquid and gas phases flowing downward with constant gas flow Q G = 2.50 x 10-6 m³ s-1 and the liquid phase flow (Q L) varying in the range from 4.25x10-6 m³ s-1 to 0.50x10-6
Braz. J. Chem. Eng.. Publicado em: 2012-09
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29. Estudo do jateamento em solos argilosos e sua aplicação à engenharia de fundações offshore / Study of water jets in clay and its application to offshore foundation engineering design
Most of all petroleum produced in Brazil is encountered in marine deposits where the water depth may exceed 1000 meters. Recent discoveries of new offshore oil fields have motivated studies in this area designed to develop new techniques applied to oil exploration. For the extraction of oil deposits floating platforms are commonly used, supported by anchorag
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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30. Busca heurística e inferência de parâmetros cinéticos de reações de hidrotratamento de óleo diesel a partir de dados experimentais escassos
Currently, the amount of contaminants (such as sulfur, nitrogen and aromatics) in diesel oil is strictly controlled, due to their impact on pollutant emissions. The most important process used to meet fuel specifications regarding contaminants is the catalytic hydrogenation, specifically hydrotreatment (HDT). Optimization of the HDT process can benefit from
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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31. Hope, risk perception and propensity to indebtedness
Hope is an important construct in marketing, once it is an antecedent of important marketing variables, such as trust, expectation and satisfaction (MacInnis & de Mello, 2005, Almeida, Mazzon & Botelho, 2007). Specifically, the literature suggests that hope can play an important influence on risk perception (Almeida, 2010, Almeida et al., 2007, Fleming, 2008
Publicado em: 10/02/2011
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32. Desenvolvimento de software de simulação da solidificação de aços no processo de lingotamento contínuo de tarugos / Development of simulation software for the continuous casting process of steel billets
The development and application of simulation software for the continuous casting process is proposed in this work. The heat transfer and solidification models were validated with experimental results of temperature measurements in an industrial plant as well as with steel billets samples. Thermocouples embedded in the mold walls were used to measure tempera
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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33. Hysteresis e o comércio exterior de produtos industrializados brasileiros
This article investigates the hypothesis of hysteresis for the Brazilian manufactured exports and imports in recent years. For that it was used an empirical measure of strong hysteresis (macroeconomic) developed by Piscitelli et al. (2000) and tested its significance in sectoral supply and demand equations for exports and in sectoral equations for import dem
Publicado em: 29/06/2010
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34. Modelagem molecular aplicada ao estudo de reações de inibição enzimática com aplicação potencial no controle de Leishmania amazonensis. 2010. / Applied molecular modeling to the enzymatic inhibition reactions study with Leishmania amazonensis controls potential application. 2010.
Parasitic protozoan diseases, transmitted by blood-feeding insects, constitute the worlds most widely spread human health problem. It is estimated that three million people suffer from a parasitic infection (mainly trypanosomatid and apicomplexan parasites), responsible for important human diseases. The compounds here studied constitute the amidines and the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/06/2010
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35. Mortars Properties Obtained by Partial Replacement of Portland Cement by Ground Waste Calcined Clay Bricks / Propriedades de argamassas obtidas pela substituição parcial de cimento Portland por rejeitos particulados de tijolos
This work describes the results of an investigation on the possible applications of ground waste calcined clay bricks (WCB) for use as an active partial replacement for Portland cement in mortars. The investigation has been carried out using a full factorial design for experimental design. For the study, the physical and mechanical properties along their dur
Publicado em: 2010
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36. In-Situ combustion : insights on field project and numerical simulation at laboratory and field scale / Combustão In-Situ : considerações sobre projeto e simulações numéricas em escala de laboratório e de campo
Behavior forecast of reservoirs subjected to in-situ combustion is hard and empirical since besides geological complexities it is necessary to reproduce complex fluid models and several chemical reactions that are part of the process. The work flow for field project usually involves: 1) reservoir screening; 2) thermo-analytical experiments; 3) combustion tub
Publicado em: 2010