Results 31 to 40 of about 1,212 (136)

Modulação Em Largura De Pulsos Para Conversor Ca-ca A Três Braços

Eletrônica de Potência, 2007
Este trabalho apresenta uma nova abordagem da modulação em largura de pulsos para um conversor estático ca-ca a três braços, utilizado em sistemas de energia ininterrupta (SEI), monofásico, on-line.
Paulo F. Seixas, Porfírio C. Cortizo, Leandro Oliveira   +2 more
doaj   +1 more source

Output‐Feedback H∞$$ {H}_{\infty } $$ Detector‐Based Control of Continuous‐Time Markov Jump Lur'e Systems With Sector‐Bound Optimization

International Journal of Robust and Nonlinear Control, Volume 36, Issue 12, Page 6304-6317, August 2026.
ABSTRACT This paper addresses the problem of dynamic output‐feedback H∞$$ {H}_{\infty } $$ detector‐based control for continuous‐time Markov Jump Lur'e Systems with uncertain transition rate matrices. In contrast to conventional approaches, the proposed synthesis conditions are derived using Finsler's lemma, introducing additional slack variables to ...
Lucas P. M. Silva, Cecilia F. Morais, Ricardo C. L. F. Oliveira   +2 more
wiley   +1 more source

A Selective‐Awakening MAC Protocol for Energy‐Efficient Data Forwarding in Linear Sensor Networks

Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018
We introduce the Selective-Awakening MAC (SA‐MAC) protocol which is a synchronized duty‐cycled protocol with pipelined scheduling for Linear Sensor Networks (LSNs). In the proposed protocol, nodes selectively awake depending on node density and traffic load conditions and on the state of the buffers of the receiving nodes.
Iclia Villordo-Jimenez, Noé Torres-Cruz, Marcelo M. Carvalho, Rolando Menchaca-Mendez, Mario E. Rivero-Angeles, Ricardo Menchaca-Mendez, Juan C. Cano   +6 more
wiley   +1 more source

Rare Caudal Regeneration Anomalies in Geckos Are Associated With Global Solar Radiation Gradients

Journal of Biogeography, Volume 53, Issue 8, August 2026.
ABSTRACT Aim Morphological abnormalities may reduce fitness in wild animals, making them ecologically relevant for conservation efforts. Anomalies, such as a bifurcation or a trifurcation of a regenerated gecko tail, can change locomotion, social signalling, and predator evasion, with potential effects on survival and reproductive success.
Lucas Rodriguez Forti, Octavio Jiménez‐Robles, Arthur Igor da Fonseca Freire, Judit K. Szabo   +3 more
wiley   +1 more source

Hybrid Vibration Control under Broadband Excitation and Variable Temperature Using Viscoelastic Neutralizer and Adaptive Feedforward Approach

Shock and Vibration, Volume 2016, Issue 1, 2016., 2016
Vibratory phenomena have always surrounded human life. The need for more knowledge and domain of such phenomena increases more and more, especially in the modern society where the human‐machine integration becomes closer day after day. In that context, this work deals with the development and practical implementation of a hybrid (passive‐active ...
João C. O. Marra, Eduardo M. O. Lopes, José João de Espíndola, Walter Antônio Gontijo, Londono Monsalve   +4 more
wiley   +1 more source

Controlling Devices Using Biological Signals

International Journal of Advanced Robotic Systems, 2011
Knowing that the driving task of a conventional wheelchair could be difficult or even impossible for impairment people, this work presents an overview of some strategies developed to aid these people. Within this context, a myoelectrical eye-blink and an
Alexandre Santos Brandão, Leonardo Bonato Felix, Daniel Cruz Cavalieri, Antonio Mauricio Ferreira Leite Miranda de Sá, Teodiano Freire Bastos-Filho, Mário Sarcinelli-Filho   +5 more
doaj   +1 more source

Investigation of the Optical and Morphological Properties of PS/POMA Blends Hybridized With Erbium Oxide (Er2O3)

Journal of Applied Polymer Science, Volume 143, Issue 16, April 20, 2026.
ABSTRACT Polymeric blends (PB) represent a rapid and cost‐effective strategy for the development of materials with tailored properties. In this study, blends of polystyrene (PS) and poly(o‐methoxyaniline) (POMA) containing 7.5 wt/wt% of POMA were prepared and hybridized with erbium oxide (Er2O3) at concentrations of 0.5, 1.0, and 3.0 wt/wt%.
Ana Carolina Pires Martins, Patrick Brito, Letícia Nunes Coelho, Djalmir Nestor Messias, Nizamara Simenremis Pereira   +4 more
wiley   +1 more source

MPPT Technique Based on Current and Temperature Measurements

International Journal of Photoenergy, Volume 2015, Issue 1, 2015., 2015
This paper presents a new maximum power point tracking (MPPT) method based on the measurement of temperature and short‐circuit current, in a simple and efficient approach. These measurements, which can precisely define the maximum power point (MPP), have not been used together in other existing techniques.
Eduardo Moreira Vicente, Robson Luiz Moreno, Enio Roberto Ribeiro, Euzeli dos Santos Jr.   +3 more
wiley   +1 more source

ENERGIA EÓLICA E IMPACTOS AMBIENTAIS: UM ESTUDO DE REVISÃO

Revista UniVap, 2017
Resumo: A energia eólica é cada vez mais utilizada em todo o mundo como uma importante contribuição para a energia renovável. Entretanto os países de interesse estão preocupados com seus respectivos impactos ambientais.
Raphael Santos do Nascimento, João Paulo Minardi de Azevedo, Igor Bertolino Schram   +2 more
doaj   +1 more source

Sistema Automático de Caracterização de Máquinas a Relutância Variável e Modelagem não Linear por Interpolações Utilizando Smoothing Splines

Eletrônica de Potência, 2015
Este trabalho apresenta em detalhes um sistema automa´tico que permite obter as curvas de magnetizac¸a˜o da ma´quina a relutaˆncia varia´vel (MRV). Sa˜o estudadas te´cnicas de interpolac¸o˜es no processamento dos dados dos ensaios para obter o modelo na˜
Ta´rcio A. S. Barros, Paulo S. Nascimento Filho, Adson B. Moreira, Vanessa S. C. Teixeira, Marcelo G. Villalva, Ernesto Ruppert   +5 more
doaj   +1 more source