Results 251 to 260 of about 9,836,724 (331)

Speckle-based X-ray microtomography via preconditioned Wirtinger flow. [PDF]

Light Sci Appl
Lee K, Hugonnet H, Lim JH, Park Y.
europepmc   +1 more source

Protocol to analyze steps of ribosome biogenesis in nuclear and cytosolic fractions of yeast cells. [PDF]

STAR Protoc
Zadali R, Topf U.
europepmc   +1 more source

Fast automated adjoints for spectral PDE solvers. [PDF]

Proc Natl Acad Sci U S A
Skene CS, Burns KJ.
europepmc   +1 more source

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A Generalized Phase Gradient Autofocus Algorithm

IEEE Transactions on Computational Imaging, 2019
The phase gradient autofocus (PGA) algorithm has seen widespread use and success within the synthetic aperture radar (SAR) imaging community. However, its use and success has largely been limited to collection geometries where either the polar format algorithm (PFA) or range migration algorithm is suitable for SAR image formation.
Aaron Evers, Julie Ann Jackson
openaire   +2 more sources

High quality factor phase gradient metasurfaces

Nature Nanotechnology, 2020
Dielectric microcavities with quality factors (Q-factors) in the thousands to billions markedly enhance light-matter interactions, with applications spanning high-efficiency on-chip lasing, frequency comb generation and modulation and sensitive molecular detection.
Mark Lawrence, David R. Barton, Jefferson Dixon, Jung-Hwan Song, Jorik van de Groep, Mark L. Brongersma, Jennifer A. Dionne   +6 more
openaire   +5 more sources

Deep Convolutional Neural Network-Based Robust Phase Gradient Estimation for Two-Dimensional Phase Unwrapping Using SAR Interferograms

IEEE Transactions on Geoscience and Remote Sensing, 2020
Two-dimensional phase unwrapping (2-D PU) is one of the key processes in reconstructing the topography or displacement of the Earth surface from its interferometric synthetic aperture radar (InSAR) data. Estimating the absolute phase gradient information
Lifan Zhou, Hanwen Yu, Yang Lan
exaly   +2 more sources

Ultrabroadband RCS Reduction and Gain Enhancement of Patch Antennas by Phase Gradient Metasurfaces

IEEE Antennas and Wireless Propagation Letters, 2023
In this letter, a novel design based on phase gradient metasurfaces (PGMs) is proposed to reduce the radar cross section (RCS) and enhance the gain of patch antennas. The PGM unit consists of a cross-dipole and three square-dipole rings.
Tianhu Zhang, Xiaoyan Pang, Han Zhang, Qingqing Zheng   +3 more
semanticscholar   +1 more source

Design of Acoustic/Elastic Phase Gradient Metasurfaces: Principles, Functional Elements, Tunability and Coding

Applied Mechanics Review, 2022
Acoustic/elastic metasurfaces as a kind of two-dimensional metamaterials are of subwavelength thickness and show remarkable ability of acoustic/elastic wave manipulation.
A-Li Chen, Yue-Sheng Wang, Yan‐Feng Wang, Hong‐Tao Zhou, S. Yuan   +4 more
semanticscholar   +1 more source