Results 11 to 20 of about 50,239 (261)

Computational Method for Wavefront Sensing Based on Transport-of-Intensity Equation

open access: yesPhotonics, 2021
Recently the transport-of-intensity equation as a phase imaging method turned out as an effective microscopy method that does not require the use of high-resolution optical systems and a priori information about the object.
Iliya Gritsenko   +4 more
doaj   +1 more source

Turbulent parameters at different heights in the atmosphere. Shack–Hartmann wavefront sensor data

open access: yesSolar-Terrestrial Physics, 2022
The paper presents the results of studies of wavefront distortions at different heights in the atmosphere. We have used measurement wavefront data to determine optical turbulence parameters along the line of sight of the Large Solar Vacuum Telescope ...
Shikhovtsev A. Y.   +5 more
doaj   +1 more source

Emergence of topological superconductivity in doped topological Dirac semimetals under symmetry-lowering lattice distortions

open access: yesScientific Reports, 2021
Recently, unconventional superconductivity having a zero-bias conductance peak is reported in doped topological Dirac semimetal (DSM) with lattice distortion.
Sangmo Cheon   +3 more
doaj   +1 more source

Impact of voltage subharmonics and interharmonics on currents in single-phase induction motors

open access: yesScientific Journal of Gdynia Maritime University, 2021
In very low power drives, a single-phase induction motor is used. This motor, like the 3-phase induction squirrel-cage motor, requires a voltage supply with suitable parameters – of suitable quality, in practice.
Marcin Pepliński
doaj   +1 more source

Single-Line-to-Ground Fault Location in Resonant Grounded Systems Based on Fault Distortions

open access: yesIEEE Access, 2021
Under single-line-to-ground (SLG) faults, the voltages and currents in resonant grounded systems will inevitably be distorted. To locate the faults quickly and accurately, this paper proposes a location method based on fault distortions. The faulty phase
Yougen Chen   +3 more
doaj   +1 more source

Anti-Jamming GNSS Antenna Array Receiver with Reduced Phase Distortions Using a Robust Phase Compensation Technique

open access: yesRemote Sensing, 2023
Antenna arrays with adaptive filtering can protect the integrity and functionality of global navigation satellite system (GNSS) receivers against interference. However, a major problem with existing adaptive array processing algorithms is that they cause
Song Li   +4 more
doaj   +1 more source

Compensation for phase distortions in nonlinear media by phase conjugation [PDF]

open access: yesOptics Letters, 1980
We demonstrate theoretically that the distortion-correction property of phase-conjugate beams propagating in reverse through aberrating media is also operative when the indices of refraction of the media depend on the intensity. A necessary condition is that the phase-conjugate mirror that generates the reflected beam possess a unity (magnitude ...
D M, Pepper, A, Yariv
openaire   +2 more sources

Function of Phase-Distortion for glottal model estimation [PDF]

open access: yes2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011
In voice analysis, the parameters estimation of a glottal model, an analytic description of the deterministic component of the glottal source, is a challenging question to assess voice quality in clinical use or to model voice production for speech transformation and syn- thesis using a priori constraints.
Degottex, Gilles   +2 more
openaire   +2 more sources

Identification of Diffracted Vortex Beams at Different Propagation Distances Using Deep Learning

open access: yesFrontiers in Physics, 2022
The Orbital angular momentum (OAM) of light is regarded as a valuable resource in quantum technology, especially in quantum communication and quantum sensing and ranging.
Heng Lv   +7 more
doaj   +1 more source

Breathing distortions in the metallic, antiferromagnetic phase of LaNiO$_3$

open access: yesSciPost Physics, 2018
I study the structural and magnetic instabilities in LaNiO$_3$ using density functional theory calculations. From the non-spin-polarized structural relaxations, I find that several structures with different Glazer tilts lie close in energy. The $Pnma$
Alaska Subedi
doaj   +1 more source

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