Closed Loop
Mostrando 1-12 de 230 artigos, teses e dissertações.
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1. Precision non-implantable neuromodulation therapies: a perspective for the depressed brain
Current first-line treatments for major depressive disorder (MDD) include pharmacotherapy and cognitive-behavioral therapy. However, one-third of depressed patients do not achieve remission after multiple medication trials, and psychotherapy can be costly and time-consuming. Although non-implantable neuromodulation (NIN) techniques such as transcranial magne
Braz. J. Psychiatry. Publicado em: 2020-08
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2. INTERNAL HERNIA FOLLOWING LAPAROSCOPIC ROUX-EN-Y GASTRIC BY-PASS: INDICATIVE FACTORS FOR EARLY REPAIR
RESUMO CONTEXTO: Hérnia interna (HI) após bypass gástrico em Y de Roux laparoscópico (BGYRL) é uma complicação importante que desafia o cirurgião devido à sua apresentação inespecífica e necessidade de reparo precoce. Um diagnóstico e intervenção cirúrgica tardios para HI pode levar a um aumento na morbidade dos pacientes e trazer grandes p
Arq. Gastroenterol.. Publicado em: 26/08/2019
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3. Hypertonic saline and pentoxifylline enhance survival, reducing apoptosis and oxidative stress in a rat model of strangulated closed loop small bowel obstruction
OBJECTIVES: Intestinal obstruction has a high mortality rate when therapeutic treatment is delayed. Resuscitation in intestinal obstruction requires a large volume of fluid, and fluid combinations have been studied. Therefore, we evaluated the effects of hypertonic saline solution (HS) with pentoxifylline (PTX) on apoptosis, oxidative stress and survival ra
Clinics. Publicado em: 06/06/2019
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4. 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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5. 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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6. Stability Characteristics of a Model Trim Adjustment System for Open Loop Active Control of Thermoacoustic Instability
ABSTRACT Thermoacoustic instability in liquid rocket engines can have potentially catastrophic consequences. Active control based on feedback promises improved stability margin over a wider range of operating conditions than passive control. In the present work, the thermoacoustic characteristics of a trim adjustment active control system based on variable v
J. Aerosp. Technol. Manag.. Publicado em: 14/01/2019
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7. Errata: Eficácia da arquitetura MLP em modo closed-loop para simulação de um Sistema Hidrológico
RBRH. Publicado em: 20/02/2017
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8. Adaptive Fuzzy Sliding-Mode Control of Wheel Slide Protection Device for ER24PC Locomotive
Abstract Wheel Slide Protection Devices (WSPD) are employed in railway vehicles to maximize the average of the possible frictional braking force, which is a nonlinear function of the slip ratio of the wheel sets. In this paper, to control the WSPD, a low-order model is presented and un-modeled dynamics are considered as uncertainties. Due to the nonlinear dy
Lat. Am. j. solids struct.. Publicado em: 2017
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9. Eficácia da arquitetura MLP em modo closed-loop para simulação de um Sistema Hidrológico
RESUMO Para a elaboração do plano de bacia se faz necessária a realização de estimativas da resposta hidrológica. Sendo assim, o objetivo desse estudo foi de avaliar a simulação do comportamento hidrológico da bacia hidrográfica do Alto Canoas localizada em Santa Catarina, através de redes neurais artificiais Multi Layer Perceptron (MLP), bem como
RBRH. Publicado em: 13/10/2016
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10. Management Process of a Frequency Response Flight Test for Rotorcraft Flying Qualities Evaluation
ABSTRACT This paper applies the frequency response methodology to characterize and analyze the flying qualities of longitudinal and lateral axes of a rotary-wing aircraft, AS355-F2. Using the results, it is possible to check the suitability of the aircraft in accordance with ADS-33E-PRF standard, whose flying qualities specifications criteria are based on pa
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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11. Artificial motor control for electrically stimulated upper limbs of plegic or paretic people
Introduction: Functional Electrical Stimulation (FES) is a technique used in the restoration and generation of movements performed by subjects with neuromuscular disorders such as spinal cord injury (SCI). The purpose of this article is to outline the state of the art and perspectives of the use of FES in artificial motor control of the upper limbs in pareti
Res. Biomed. Eng.. Publicado em: 14/06/2016
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12. TUNING OF MODEL PREDICTIVE CONTROL WITH MULTI-OBJECTIVE OPTIMIZATION
Abstract Two multi-objective optimization based tuning methods for model predictive control are proposed. Both methods consider the minimization of the error between the closed-loop response and an output reference trajectory as tuning goals. The first approach is based on the ranking of the outputs according to their importance to the plant operation and it
Braz. J. Chem. Eng.. Publicado em: 2016-06