Impulse Response
Mostrando 1-12 de 158 artigos, teses e dissertações.
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1. Efficient Low-Complexity Optimized Channel Estimating Methods for OFDM-Based Low-Voltage Broadband Power Line Communication Systems
Abstract Broadband Power Line Communication (BB-PLC) technology enables data transmission for smart grid applications. Nevertheless, channel equalizers are required in the receiver to estimate and compensate for the nonlinear time-variant impulse response and noise interference effects introduced by the BB-PLC channel. In this paper, we append the Particle S
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Importance of Vestibulo-ocular Reflex Gain and Refixation Saccade Analysis in Individuals with Auditory Neuropathy Spectrum Disorder
Abstract Introduction Auditory neuropathy spectrum disorder (ANSD) features the presence of otoacoustic emissions, poor speech identification score and absent auditory brainstem response. Objective The present study was designed to evaluate the functioning of all six semicircular canals in individuals with ANSD and to compare it with those of normalheari
Int. Arch. Otorhinolaryngol.. Publicado em: 2020-06
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3. Multiplicadores Fiscais Dependentes do Ciclo Econômico: O que é possível dizer para o Brasil?
Resumo O objetivo deste artigo é investigar se os multiplicadores de gastos do governo diferem de acordo com o estado do ciclo de negócios para o período 1997: T1-2017: T2. Para tanto, é utilizado o Método de Projeção Local de Jordà para estimar as funções-resposta a impulso e os multiplicadores fiscais sob dois regimes diferentes: recessão e expa
Estud. Econ.. Publicado em: 10/01/2020
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4. A study on the response of single and double circular plates subjected to localised blast loading
Abstract The response of single and double layered steel plates to localised air-blast loading was examined. Two configurations, both comprising fully clamped circular plates with a 200 mm exposed diameter, were considered: 4mm thick single and (2+2) mm double layered plates. The localised air-blast loading was applied by centrally detonating discs of PE4 pl
Lat. Am. j. solids struct.. Publicado em: 14/11/2018
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5. Influence of High Current-Density Impulses on the Stress-Strain Response and Microstructural Evolution of the Single Crystal Superalloy CMSX-4
Owing to the low formability of single-crystal nickel-based materials, single-crystal components are typically cast. Subsequently, a multi-stage heat treatment is carried out in order to partially compensate the dendrite segregation and to stabilize the precipitated γ’-phase. Such components possess a high resistance to creep at elevated temperatures. Sin
Mat. Res.. Publicado em: 22/10/2018
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6. Modeling and FPGA-based implementation of an efficient and simple envelope detector using a Hilbert Transform FIR filter for ultrasound imaging applications
Abstract Introduction Although the envelope detection is a widely used method in medical ultrasound (US) imaging to demodulate the amplitude of the received echo signal before any back-end processing, novel hardware-based approaches have been proposed for reducing its computational cost and complexity. In this paper, we present the modeling and FPGA impleme
Res. Biomed. Eng.. Publicado em: 15/01/2018
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7. Effects of the Strain Rate Sensitivity and Strain Hardening on the Saturated Impulse of Plates
Abstract This paper studies the stiffening effects of the material strain rate sensitivity and strain hardening on the saturated impulse of elastic, perfectly plastic plates. Finite element (FE) code ABAQUS is employed to simulate the elastoplastic response of square plates under rectangular pressure pulse. Rigid-plastic analyses for saturated impulse, which
Lat. Am. j. solids struct.. Publicado em: 2017-08
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8. Effects of CFRP retrofit on impact response of shear-deficient scaled reinforced concrete beams
An experimental procedure is carried out to investigate response features of semi-deep reinforced concrete (RC) beams with dominant static shear failure subjected to low-velocity impact dynamic load both in intact and retrofitted cases. Built specimens have scaled geometry and material properties preserving physical similarity with full-scale members and are
Lat. Am. j. solids struct.. Publicado em: 2015-01
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9. Characterization of the radiation pattern of antennas via FDTD and time-domain moment expansion
An alternative method is proposed to characterize the radiation pattern of antennas from an impulse response, based on a moment expansion together with a frequency domain near-to-far-field transformation via a FDTD/CPML solver. The approach introduced in the present work is intended for printed antenna analysis in special cases when the geometries to be mode
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-06
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10. A numerical simulation of metallic cylindrical sandwich shells subjected to air blast loading
The dynamic response of cylindrical sandwich shells with aluminum foam cores subjected to air blast loading was investigated numerically in this paper. According to KNR theory, the nonlinear compressibility of the air and finite shock conditions were taken into account in the finite element model. Numerical simulation results show that the compression strain
Lat. Am. j. solids struct.. Publicado em: 2013-05
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11. Time course of the hemodynamic responses to aortic depressor nerve stimulation in conscious spontaneously hypertensive rats
The time to reach the maximum response of arterial pressure, heart rate and vascular resistance (hindquarter and mesenteric) was measured in conscious male spontaneously hypertensive (SHR) and normotensive control rats (NCR; Wistar; 18-22 weeks) subjected to electrical stimulation of the aortic depressor nerve (ADN) under thiopental anesthesia. The parameter
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-05
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12. CARACETERIZAÇÃO ACÚSTICA DE SALAS PARA PRÁTICA E ENSINO MUSICAL / ACOUSTIC CHARACTERIZATION OF ROOMS FOR MUSIC PRACTICE AND TEACHING
O músico necessita perceber adequadamente o som nos recintos onde atua, seja em ambientes destinados à performance, seja em ambientes destinados ao estudo e prática musical. Para que isto seja possível é necessário que estes locais estejam acusticamente adequados, permitindo o desenvolvimento e aprimoramento da percepção sonora musical. No presente t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011