Results 11 to 20 of about 104,044 (167)
IEEE Access, 2022 We report a multi–dimensional quadrature amplitude modulation with M-ary differential phase shift keying (QAM-MDPSK) modulation for optical access network transmission systems employing a Mach–Zehnder modulator (MZM) and a phase modulator ...
Joungmoon Lee +3 more
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Model-Free Lens Distortion Correction Based on Phase Analysis of Fringe-Patterns
Sensors, 2020 The existing lens correction methods deal with the distortion correction by one or more specific image distortion models. However, distortion determination may fail when an unsuitable model is used.
Jiawen Weng +4 more
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Effect of Phase-Encoding Reduction on Geometric Distortion and BOLD Signal Changes in fMRI [PDF]
Iranian Journal of Medical Physics, 2013 Introduction Echo-planar imaging (EPI) is a group of fast data acquisition methods commonly used in fMRI studies. It acquires multiple image lines in k-space after a single excitation, which leads to a very short scan time.
Golestan karami +3 more
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The effect of initial and prior models on phase tensor inversion of distorted magnetotelluric data
Earth, Planets and Space, 2022 Magnetotelluric (MT) data are often distorted by near-surface small-scale lateral heterogeneities. Inverting distorted MT data may produce artifacts or false anomalies, leading to unreliable interpretation.
T. Rung-Arunwan +2 more
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Amplitude Modulation to Phase Modulation Conversion in Photonic Bandpass Sampling Link
IEEE Photonics Journal, 2021 The photonic bandpass sampling has been proved to be potential in multi-carrier communication, frequency-agile coherent radar, compressive sensing, etc.
Shanhong Guan +4 more
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Phase Corrections With Adaptive Optics and Gerchberg-Saxton Iteration: A Comparison
IEEE Access, 2019 Free space optical communications technique is the promising alternative for the access/fronthual networks to relieve the traffic congestion. The turbulence in the free space channel, however, could cause the phase distortions in optical signals, thus ...
Ming Li
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IEEE Access, 2020 The open-switch fault of three-phase voltage source rectifiers (VSR) may lead to ac current distortion. In the past decade, some current-based fault diagnosis methods have been proposed, which directly used the phenomenon of current distortion but lacked
Chunsong Sui, Yigang He, Mingyun Chen
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Journal of Mechatronics, Electrical Power, and Vehicular Technology, 2023 The increasing use of power electronics in various sectors leads to harmonic distortion in electric power systems, affecting power quality and equipment longevity.
Langlang Gumilar +4 more
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SPEED DEPENDENCE OF ACOUSTIC VIBRATION PROPAGATION FROM THE FERRITIC GRAIN SIZE IN LOW-CARBON STEEL
Nauka ta progres transportu, 2015 Purpose. It is determining the nature of the ferrite grain size influence of low-carbon alloy steel on the speed propagation of acoustic vibrations. Methodology. The material for the research served a steel sheet of thickness 1.4 mm. Steel type H18T1 had
I. A. Vakulenko +3 more
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High-Precision Calibration of Phase-Only Spatial Light Modulators
IEEE Photonics Journal, 2022 In the fields of optics and photonics, phase-only spatial light modulators (SLMs) play an increasingly important role in wave-front engineering. However, the SLMs are subject to wavefront distortion arising from the imperfection in the birefringence ...
Yicheng Zhao +7 more
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