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Improving rational modeling realization for accurate EMT simulations

Kida, Alexandre Akira; http://lattes.cnpq.br/0852842124815116 (Universidade Federal da BahiaPrograma de Pós-Graduação em Engenharia Elétrica (PPGEE) UFBABrasilEscola Politécnica, 2-09)

Time-domain simulations carried out with linear multistep integration methods, such as the Trapezoidal Rule, are subject to an error often neglected in electromagnetic transient (EMT) analyses, known as Frequency Warping. ...
Síntese de compósitos baseados em óxido de ferro, dióxido de titânio e material carbonáceo pelo método da combustão para aplicação em fotocatálise heterogênea

Castro, Lucas Malone Ferreira de; https://orcid.org/0000-0002-9979-3340; http://lattes.cnpq.br/2169114651161501 (UNIVERSIDADE FEDERAL DA BAHIAPrograma de Pós-Graduação em Engenharia Quimica (PPEQ) UFBABrasilEscola Politécnica, 2-09-01)

Environmental contamination is a growing global concern, driving the development of alternative mitigation strategies. Heterogeneous photocatalysis is a promising approach, yet conventional semiconductors such as titanium ...
Ocorrência de compostos policíclicos aromáticos heterocíclicos contendo enxofre (PASHs) e mercúrio na biota marinha: uma perspectiva químico-ecotoxicológica

Nascimento, Melise Lemos; 0000-0001-8350-5722; http://lattes.cnpq.br/3220575717830804 (Universidade Federal da BahiaOutroUFBABrasilEscola Politécnica, 8-08-21)

This study employed polychaetes and corals as tools to determine the occurrence of harmful substances in the environment, such as sulfur-containing Polycyclic Aromatic Heterocycles (PASHs) and the metal mercury (Hg), along ...
Avaliação das incertezas nas informações sobre as resistências à tração na flexão e compressão de argamassas cimentícias com lodo de ETA

Souza, Thiago Francisco; 0000-0001-6559-9323; http://lattes.cnpq.br/1685387904983113 (Universidade Federal da BahiaPrograma de Pós-Graduação em Engenharia Industrial (PEI) UFBABrasilEscola Politécnica, 10-10-30)

Research on the incorporation of water treatment plant sludge (WTS) into cementitious mortars plays an important role in environmental sustainability by enabling the reuse of solid waste and reducing improper disposal. ...
Modelagem e situação de reatores catalíticos de leito fixo e fluxo radial

Kalid, Ricardo de Araújo (1991-05-02)
Os estudos de impactos ambientais no Brasil: uma análise de sua efetividade

Autor desconhecido (IPEA, 1993)

Com o advento do Estudo de impacto Ambiental(EIA) estabelecido pelo Conselho Nacional d Meio Ambiente-CONAMA em 1986 como requisito para a apreciação do Licenciamento Ambiental, se tornou relevante analisar a prática ...
An explicit physical model for the long-channel MOS transistor including small-signal parameters

Cunha, Ana Isabela Araújo; Schneider, Marcio Cherem; Galup-Montoro, Carlos (Solid-State Electronics, 1995)

This paper presents a long-channel MOSFET model wherein the drain current, total charges and small-signal parameters for quasi-static operation are very simple functions of the inversion charge densities at the channel ...
Influence of the mixing rule on the liquid-liquid equilibrium calculation

Verotti Filho, C.; Costa, Glória Meyberg Nunes (1996)

Liquid-liquid equilibrium data were correlated with three mixing rules that incorporate excess Gibbs energy model into a equation of state: Wong-Sandler, Heidemann-Kokal and MHV2 methods. The Soave equation of state is ...
Environmental optimisation of releases from industrial sites into a linear receiving body

Sharratt, P. N.; Kiperstok, Asher (Computers and Chemical Engineering, 1996)

Changes to environmental legislation are setting new challenges to both operators and regulators. Optimisation tools can help to turn subjective standards such as Best Practicable Environmental Option (BPEO) (HMIP, 1994: ...
Influence of the mixing rule on the liquid-liquid equilibrium calculation

Verotti Filho, C.; Costa, Glória Meyberg Nunes (Fluid Phase Equilibria, 1996)

Liquid-liquid equilibrium data were correlated with three mixing rules that incorporate excess Gibbs energy model into a equation of state: Wong-Sandler, Heidemann-Kokal and MHV2 methods. The Soave equation of state is ...
TThermoluminescence mechanism in Li2B4O7: Cu

Watanabe, Shigueo; Chinaglia, Eliane de Fatima; Nascimento, Marcio Luis Ferreira; Matusuoka, Masao (1996)
A feedback I2-controlled constant temperature solar radiation meter

Oliveira, Amauri; Deep, Gurdip Singh; Lima, Antonio Marcus Nogueira; Freire, Raimundo Carlos Silvério (1998)

The conventional thermoresistive sensor-based feedback constant temperature circuits have shown some performance limitations due to the input offset voltage of the amplifier. The dc analysis of this circuit has been ...
An MOS transistor model for analog circuit design

Cunha, Ana Isabela Araújo; Schneider, Marcio Cherem; Galup Montoro, Carlos (1998)

This paper presents a physically based model for the metal-oxide-semiconductor (MOS) transistor suitable for analysis and design of analog integrated circuits. Static and dynamic characteristics of the MOS field-effect ...
Exergetic evaluation of a cogeneration system in a petrochemical complex

Torres, Ednildo Andrade; Gallo, W. L. R. (1998)

The purpose of this paper is the study of a real cogeneration system existing in a petrochemical complex. The total capacity of the plant is 200 MW of electrical power and 2100 t/h of steam for processes. This work presents ...
On a q-generalization of circular and hyperbolic functions

Borges, Ernesto Pinheiro (Journal of physics A: Mathematical and general, 1998)

A generalization of the circular and hyperbolic functions is proposed, based on the Tsallis statistics and on a consistent generalization of the Euler formula. Some properties of the presently proposed q-trigonometry are ...
Covariance management based RLS algorithm for phasor estimation in severely noisy systems

Almeida, Luiz Alberto Luz de; Lima, Antonio Cezar de Castro (1998-10)

This paper presents a new algorithm, derived from the recursive least squares (RLS), to estimate power system voltage and current harmonics for digital relay purposes. The algorithm is based on the RLS covariance matrix ...
Tensión superficial, viscosidad y densidad de algunas escorias CaO-Al203 (#)

Oliveira, F.A.; Miller, A.; Madías, J. (Revista de Metalurgia, 1999)

Los conceptos metalúrgicos con respecto a la estructura y propiedades de los aluminatos de calcio, están predominantemente basados en analogías con el sistema ternario CaO-Al203-Si02. En este trabajo se presentan y discuten ...
A q-generalization of Laplace transforms

Lenzi, E. K .; Borges, Ernesto Pinheiro; Mendes, R. S. (Journal of physics A: Mathematical and general, 1999)

The Laplace transform is generalized by using the q-exponential function ex q [1 + .1 − q/x]1=.1−q/ that emerges from Tsallis’ non-extensive statistical mechanics, and some of its properties are obtained. The usual ...
Modeling high-pressure vapor–liquid equilibrium of limonene, linalool and carbon dioxide systems

Melo, Silvio Alexandre Beisl Vieira de; Costa, Glória Meyberg Nunes; Uller, A. M. C.; Pessoa, F. L. P. (1999)

The research reported in this study is focused on modeling high-pressure phase behavior for CO2–limonene and CO2–linalool. A modified Peng–Robinson equation of state was applied to calculate vapor–liquid equilibrium using ...
Modelagem, simulação, controle e otimização de conversores de acetileno

Kalid, Ricardo de Araújo (1999)

Os conversores de acetileno são importantes equipamentos das unidades produtoras de etileno. A função deste reator catalítico de leito fixo e fluxo axial é reduzir a quantidade de acetileno (1 a 2 % mol) presente na corrente ...

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