Results 11 to 20 of about 1,799,934 (343)

Convolutional Phase Retrieval via Gradient Descent [PDF]

open access: yesIEEE Transactions on Information Theory, 2020
64 pages , 9 figures, appeared in NeurIPS 2017. Accepted at IEEE Transactions on Information Theory.
Qing Qu   +3 more
openaire   +2 more sources

Transmission Structured Illumination Microscopy for Quantitative Phase and Scattering Imaging

open access: yesFrontiers in Physics, 2021
In this paper, we demonstrate a digital micromirror device (DMD) based optical microscopic apparatus for quantitative differential phase contrast (qDIC) imaging, coherent structured illumination microscopy (SIM), and dual-modality (scattering/fluorescent)
Kai Wen   +5 more
doaj   +1 more source

Optical Trapping and Separation of Metal Nanoparticles by Cylindrical Metalenses With Phase Gradients

open access: yesIEEE Photonics Journal, 2020
We proposed a method for driving metal nanoparticles in the focal field by cylindrical metalens with phase gradient. It was found that the introduced gradient phase would not affect the formation of the focal line, where metal nanoparticles can be ...
Zhe Shen   +3 more
doaj   +1 more source

New Interferometric Phase Unwrapping Method Based on Energy Minimization From Contextual Modeling

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Two-dimensional phase unwrapping is a critical processing procedure of synthetic aperture radar interferometry. This operation becomes even more difficult in the presence of noise.
Ayoub Tlili   +3 more
doaj   +1 more source

A Robust InSAR Phase Unwrapping Method via Phase Gradient Estimation Network

open access: yesRemote Sensing, 2021
Phase unwrapping is a critical step in synthetic aperture radar interferometry (InSAR) data processing chains. In almost all phase unwrapping methods, estimating the phase gradient according to the phase continuity assumption (PGE-PCA) is an essential ...
Liming Pu   +6 more
doaj   +1 more source

Magnetized Domain Walls in the Deconfined Sakai-Sugimoto Model at Finite Baryon Density [PDF]

open access: yes, 2011
The magnetized pure pion gradient ($\mathcal{5}\phi$) phase in the deconfined Sakai-Sugimoto model is explored at zero and finite temperature. We found that the temperature has very small effects on the phase.
CV Johnson   +19 more
core   +2 more sources

A strategy to introduce multi-gradient structures into iron by explosive shock wave processing

open access: yesJournal of Materials Research and Technology, 2023
A strategy combining shock-induced phase transition, twins, and dislocations to produce a multi-gradient structure in Fe is designed and proposed by the explosive processing method. A specific emulsion explosive is designed to introduce gradient pressure
Jianian Hu   +5 more
doaj   +1 more source

Strain-gradient mediated local conduction in strained bismuth ferrite films [PDF]

open access: yes, 2019
It has been recently shown that the strain gradient is able to separate the light-excited electron-hole pairs in semiconductors, but how it affects the photoelectric properties of the photo-active materials remains an open question.
Alexe, Marin   +4 more
core   +1 more source

Achieving Directive Radiation and Broadband Microwave Absorption by an Anisotropic Metasurface

open access: yesIEEE Access, 2019
Simultaneously integrating electromagnetic absorption and wavefront-shaping into a single metasurface with flat and low profile is crucial for many practical applications both in science and engineering community. Here, by introducing lossy components to
Jun Sun   +6 more
doaj   +1 more source

A two-phase gradient method for quadratic programming problems with a single linear constraint and bounds on the variables [PDF]

open access: yes, 2018
We propose a gradient-based method for quadratic programming problems with a single linear constraint and bounds on the variables. Inspired by the GPCG algorithm for bound-constrained convex quadratic programming [J.J. Mor\'e and G.
Barlow, Jesse   +3 more
core   +2 more sources

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