Results 31 to 40 of about 5,552,824 (295)
Understanding of Wood Anomalies in Metallic Gratings From Phase Gradient Metasurfaces
Frontiers in Materials, 2022 Phase-gradient metasurfaces (PGMs) have provided unprecedented opportunities for manipulating light. Here, we reexamine ordinary and well-studied subwavelength metallic gratings (OMGs) from the concept of PGMs to provide more insight into their ...
Jiaqi Quan +4 more
doaj +1 more source
Gradient flows as a selection procedure for equilibria of nonconvex energies [PDF]
, 2006 For atomistic material models, global minimization gives the wrong qualitative behavior; a theory of equilibrium solutions needs to be defined in different terms.
Ortner, Christoph
core +1 more source
Autonomous division and integration of anonymous agents by using interaction between oscillators
Nihon Kikai Gakkai ronbunshu, 2017 In this paper, we proposed a system in which robot swarms autonomously divide or merge themselves according to phase gradients emerged by coupled oscillators.
Shunya YAMASHITA +2 more
doaj +1 more source
An example in the gradient theory of phase transitions [PDF]
ESAIM: Control, Optimisation and Calculus of Variations, 2002 This paper is devoted to the asymptotic study as \(\varepsilon\rightarrow 0\) of the Ginzburg-Landau energy functional \(F_\varepsilon (u)=\int_\Omega \left(\varepsilon | \nabla^2u| ^2+\varepsilon^{-1}(1-| \nabla u| ^2)^2 \right)dx\), where \(\Omega\) is an open set in \(\mathbb R^n\).
openaire +3 more sources
Positioning and Mitigating Mining-Induced Phase Gradients for InSAR Phase Unwrapping
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingInterferometric synthetic aperture radar (SAR) has been widely used for deformation monitoring in mining areas. However, the nonlinear high-phase gradients caused by subsidence funnels are a major source of error in accurate measurements, as they present
Xin Tian, Xia Wu, Hanwen Yu, Mi Jiang
doaj +1 more source
Reconfigurable High-Efficiency metadevice using Kirigami-Inspired phase gradient metasurfaces
Results in Physics, 2023 Kirigami-inspired metasurface has attracted great attention in electromagnetic (EM) wave manipulations, due to its unprecedented and tailorable structural transformations via mechanical approaches.
Huiling Luo +6 more
doaj +1 more source
Tunable phase-gradient-based optical tweezers
, 2019 Conventional optical tweezers are generated by the intensity gradient of highly focused laser beams, but the requirement of strong intensity gradient limits the tunability of optical traps.
Fan Nan (1491646) +2 more
core +1 more source
Remote SensingGeometric complexities of a fault system have a significant impact on the rupture behavior of the fault. The 2021 Mw7.4 Maduo earthquake occurred on a multi-segmented complex sinistral fault in the interior of the Bayan-Har block in the northern Tibetan ...
Xiaoli Liu +7 more
doaj +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingContinuous ground-based synthetic aperture radar (C-GBSAR) suffers from heavy data loads, inflexible installation, and high costs, limiting its efficiency and maintainability. In contrast, discontinuous GBSAR (D-GBSAR) serves as a complementary technique
Yuanhui Mo +8 more
doaj +1 more source
Robust Gradient Descent for Phase Retrieval
CoRRRecent progress in robust statistical learning has mainly tackled convex problems, like mean estimation or linear regression, with non-convex challenges receiving less attention. Phase retrieval exemplifies such a non-convex problem, requiring the recovery of a signal from only the magnitudes of its linear measurements, without phase (sign) information.
Buna-Marginean, A, Rebeschini, P
openaire +4 more sources