Robustness
Mostrando 37-48 de 556 artigos, teses e dissertações.
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37. Esquema Explícito Semi-Analítico para a Solução da Equação da Onda Unidimensional com Condições de Contorno Naturais
RESUMO Este artigo aborda o desenvolvimento de um esquema explícito semi-analítico destinado à solução da equação da onda unidimensional não homogênea. Uma malha espaço-tempo foi construída através da relação incremental c Δ t = Δ x, de tal modo que volumes de controle foram formados a partir das retas características da referida equação
TEMA (São Carlos). Publicado em: 03/06/2019
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38. Nonlinear H∞ control scheme for a flying robot
Abstract In this paper, a nonlinear H∞ state feedback control is designed for both orientation and altitude of a flying robot system in the presence of external disturbance. An analytical solution is proposed for Hamilton-Jacobi-Isaac (HJI) equation. According to the quadrotor's orientation and altitude, a suitable storage function is considered and the ap
Lat. Am. j. solids struct.. Publicado em: 13/05/2019
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39. MULTI-AGENT BASED MODELING APPLIED TO PORTFOLIO SELECTION IN THE DOOM-LOOP OF SOVEREIGN DEBT CONTEXT*
ABSTRACT This study explores the self-fulfilling dynamic between sovereign debt risk and rational choices of neutral, risk-seeking and risk-averse investors, with implications to the systemic risk emergence. The agent-based model parameterization includes investment strategy (randomly selected assets, stock exchange participation, economic segment, and techn
Pesqui. Oper.. Publicado em: 09/05/2019
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40. Mechanical and Microstructural Properties of Redispersible Polymer-Gypsum Composites
Studies on gypsum modified by polymers have been conducted to assess the potential of improvement in the mechanical performance, water resistance and increasing the setting time, facilitating its handling. Gypsum-based compounds made with different additions of redispersible polymers were studied, such as: ethylene-vinyl acetate (EVA), vinyl acetate terpolym
Mat. Res.. Publicado em: 25/04/2019
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41. Satellite Inertia Parameters Estimation Based on Extended Kalman Filter
ABSTRACT: The moment of inertia parameters play a critical role in assuring the spacecraft mission throughout its lifetime. However, determination of the moment of inertia is a key challenge in operating satellites. During satellite mission, those parameters can change in orbit for many reasons such as sloshing, fuel consumption, etc. Therefore, the inertia
J. Aerosp. Technol. Manag.. Publicado em: 28/03/2019
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42. Research of the Photoelectric Tracking and Pointing Platform Based on the Servo Control System
ABSTRACT: To improve the speed and accuracy of the photoelectric tracking and pointing platform stable tracking, we took the three-axis photoelectric tracking platform, of which the coupling among the rings is ignored, as the research object. Considering the effects of various disturbances, the stable tracking double closed-loop servo control system was buil
J. Aerosp. Technol. Manag.. Publicado em: 18/03/2019
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43. Fatigue degradation strategies to simulate crack propagation using peridynamic based computational methods
Abstract The aim of this paper is to develop new computational tools to study fatigue crack propagation in structural materials. In particular we compare the performance of different degradation strategies to study fatigue crack propagation phenomena adopting peridynamic based computational methods. Three fatigue degradation laws are proposed. Two of them ar
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
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44. Misvaluation and behavioral bias in the Brazilian stock market
RESUMO O estudo buscou utilizar o modelo desenvolvido por Gokhale et al. (2015) para identificar existência de sobrerreação e vieses comportamentais no mercado de ações brasileiro e analisar seu desempenho como estratégia de investimentos na Bolsa de Valores, Mercadorias e Futuros de São Paulo (BM&FBOVESPA), no curto e longo prazo, bem como testar sua
Rev. contab. finanç.. Publicado em: 2019-03
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45. Helminthic infection in three native rodent species from a semiarid Mediterranean ecosystem
Resumo Os helmintos parasitas não são um componente ainda bem conhecido da biodiversidade animal. Neste trabalho, descreveu-se e comparou-se as redes de endoparasitas de três espécies de roedores nativos de um ecossistema mediterrâneo semiárido. No estudo foram detectadas um total de oito de espécies de helmintos gastrointestinais parasitas. As comun
Rev. Bras. Parasitol. Vet.. Publicado em: 2019-03
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46. A numerical analysis of a concrete slab breaching using high explosives
Resumo Invasão de perímetros com explosivos, demolições de estruturas robustas e incidentes envolvendo explosões não-programadas podem ser extremamente perigosos. A gravidade destes eventos demanda estudos que possam levar a um conhecimento mais profundo do fenômeno explosão e de sua interação com elementos estruturais. Este trabalho apresenta uma
Rev. IBRACON Estrut. Mater.. Publicado em: 2019-02
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47. VALIDAÇÃO DE MÉTODO ESPECTROFOTOMÉTRICO DE ANÁLISE PARA A QUANTIFICAÇÃO DE ÁCIDO ACETILSALICÍLICO EM FORMULAÇÕES FARMACÊUTICAS: UMA PROPOSTA DE AULA EXPERIMENTAL PARA ANÁLISE INSTRUMENTAL
In the present article it is described the validation of a simple, precise, accurate, rapid and low-cost UV spectrophotometric method for the quantification of acetylsalicylic acid in pharmaceutical formulations. The method was validated by linearity, specificity, range, accuracy, precision, robustness, and limits of detection and quantification. The method
Quím. Nova. Publicado em: 2019-01
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48. FIGURES OF MERIT EVALUATION OF GC/MS METHOD FOR QUANTIFICATION OF 2-PHENOXYETHANOL FROM BALLPOINT PEN INK LINES AND DETERMINATION OF THE INFLUENCE OF SUPPORT PAPER ON SOLVENT EXTRACTION
Brazilian Forensic Scientists are frequently asked about ballpoint pen manuscripts chronology in documents suspected to be forged. In the recent years, many methods like quantification of 2-PE (2-phenoxyethanol) have been developed on this subject. The validation of these methods only recently has been a concern between scientific forensic community. Researc
Quím. Nova. Publicado em: 2019-01