Nonlinear H1 Control
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Paraquat Resistance of Sumatran Fleabane (Conyza sumatrensis)
RESUMO: No Brasil, Conyza bonariensis e C. canadensis apresentam biótipos resistentes a glyphosate e C. sumatrensis apresenta resistência múltipla a glyphosate e chlorimuron. Durante as safras de 2014/2015 e 2015/2016 foram relatadas falhas no controle de buva submetida à aplicação de paraquat. Este estudo teve por objetivo investigar a possibilidade d
Planta daninha. Publicado em: 08/04/2019
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2. Effects of resistance training protocols on nonlinear analysis of heart rate variability in metabolic syndrome
Despite the various standard non-linear measurements used in autonomic modulation (AM) assessments usually being applied to long time-series, such analyses can sometimes be applied to shorter term series. To overcome this disadvantage, chaotic global methods were formulated by putting together heart rate variability (HRV) linear methods. Chaos provides infor
Braz J Med Biol Res. Publicado em: 11/06/2018
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3. Influence of expiratory positive airway pressure on cardiac autonomic modulation at rest and in submaximal exercise in COPD patients
The aim of this study was to evaluate the effect of expiratory positive airway pressure (EPAP) on heart rate variability (HRV) indices at rest and during 6-min walk test (6MWT) in chronic obstructive pulmonary disease (COPD) patients. Fifteen moderate to severe COPD patients were randomized and evaluated with and without (Non-EPAP) a 5 cmH2O EPAP device. Res
Braz J Med Biol Res. Publicado em: 19/04/2018
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4. Effect of the dietary level of cull pinto beans (Phaseolus vulgaris) on ruminal fermentation, kinetics, and digestibility of hair lambs
ABSTRACT The objective was to evaluate the effect of three levels of cull pinto beans (CPB; Phaseolus vulgaris) on ruminal fermentation, kinetics, and nutrient digestibility in hair lambs. Six cannulated lambs averaging 56.6±3.8 kg were used and were randomly assigned to one of three treatments. Treatments were: 0.0 kg kg−1 of CPB in the supplement (contr
R. Bras. Zootec.. Publicado em: 2017-05
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5. Long-term correlation of the electrocorticogram as a bioindicator of brain exposure to ionizing radiation
Understanding the effects of radiation and its possible influence on the nervous system are of great clinical interest. However, there have been few electrophysiological studies on brain activity after exposure to ionizing radiation (IR). A new methodological approach regarding the assessment of the possible effects of IR on brain activity is the use of line
Braz J Med Biol Res. Publicado em: 12/06/2015
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6. Detection of 1-aminocyclopropane-1-carboxylate oxidase activity in seeds of Stylosanthes humilis H.B.K
The activity of 1-aminocyclopropane-1-carboxylate oxidase (ACO) was characterized in seeds of the tropical legume Townsville stylo (Stylosanthes humilis) both in vitro (desalted extract of non-dormant seeds) and in vivo (entire dormant seeds). Optimum conditions for maximum in vitro ACO activity in a Trizma-HCl 100 mM buffered medium were: pH 7.0, temperatur
Theor. Exp. Plant Physiol.. Publicado em: 2013
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7. Cardiac autonomic modulation during progressive upper limb exercise by patients with coronary artery disease
The purpose of this study was to investigate the behavior of heart rate (HR) and HR variability (HRV) during different loads of resistance exercise (incline bench press) in patients with coronary artery disease (CAD) and healthy sedentary controls. Ten healthy men (65 ± 1.2 years, control group, CG) and 10 men with clinically stable CAD (66 ± 2.4 years, CA
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-12
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8. Effects of different levels of positive airway pressure on breathing pattern and heart rate variability after coronary artery bypass grafting surgery
The application of continuous positive airway pressure (CPAP) produces important hemodynamic alterations, which can influence breathing pattern (BP) and heart rate variability (HRV). The aim of this study was to evaluate the effects of different levels of CPAP on postoperative BP and HRV after coronary artery bypass grafting (CABG) surgery and the impact of
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-01
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9. Nonlinear process identification and friction quantification in control valves. / Identificação de processos não-lineares e quantificação de atrito em válvulas de controle.
The friction in control valves and inadequate controller tuning are two of the major sources of performance degradation in control loops that include such devices. As friction models are needed to diagnose abnormal valve operation or to compensate such undesirable effects, process models play an essential role in controller design. This work extends existing
Publicado em: 2009
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10. Adaptive Nonlinear H controllers applied to constrained manipulators / Controladores adaptativos não-lineares com critério H aplicados a manipuladores com restrições de força e posição
Neste trabalho é apresentado um estudo comparativo entre quatro controladores H não lineares aplicados a um manipulador robótico com restrições de força e posição. Para estudar o comportamento de cada controlador as seguintes estratégias foram adotadas: (1) o modelo nominal do robô é considerado conhecido e são utilizadas técnicas inteligentes p
Publicado em: 2009
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11. Nonlinear H-infinity controller applied on electromagnetic suspension system: project and implementation on fixed-point DSP. / Controle H-infinito não-linear aplicado em sistema de levitação magnética: projeto e implementação em DSP de ponto-fixo.
Sistemas de levitação magnética são inerentemente não-lineares e, quando con- trolados digitalmente, normalmente, esbarram em limitações do hardware empregado. O objetivo desta tese é apresentar aspectos teóricos e práticos durante a aplicação da teoria de controle H1 não-linear em sistemas de levitação magnética. A primeira con- tribuição
Publicado em: 2008
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12. Controle H-infinito não linear e a equação de Hamilton Jacobi-Isaacs. / Nonlinear H-infinity control and the Hamilton-Jacobi-Isaacs equation.
O objetivo desta tese é investigar aspectos práticos que facilitem a aplicação da teoria de controle H1 não linear em projetos de sistemas de controle. A primeira contribuição deste trabalho é a proposta do uso de funções ponderação com dinâmica no projeto de controladores H1 não lineares. Essas funções são usadas no projeto de controladores
Publicado em: 2008