Results 161 to 170 of about 2,924,633 (320)
Piecewise nonlinear approximation for non-smooth functions
Results in Applied MathematicsPiecewise affine or linear approximation has garnered significant attention as a technique for approximating piecewise-smooth functions. In this study, we propose a novel approach: piecewise non-linear approximation based on rational approximation, aimed
S. Akansha
doaj
On nonuniqueness in nonlinear L2-approximation
Journal of Approximation Theory, 1987 AbstractIt is shown that, under weak assumptions, nonlinear L2-approximation problems generally have unbounded numbers of local best approximations. This includes the rational and the exponential families of approximating functions. In addition, for a certain class of approximating families, we construct functions with three global best approximations.
openaire +2 more sources
An Addendum to "Stochastic Approximation and Nonlinear Regression" [PDF]
, 1970 Albert Antwi, Leland A. Gardner
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Exciton Dynamics in Layered Halide Perovskite Light‐Emitting Diodes
Advanced Materials, EarlyView.This review discusses the exciton dynamics in layered halide perovskitelight‐emitting diodes (PeLEDs). It opens with a summary of the structural and photophysical aspects, followed by an exploration of controlling dimensionality and cascade exciton transfer in quasi‐2D PeLEDs.
Sung‐Doo Baek +5 more
wiley +1 more source
Manipulating Ferroelectric Topological Polar Structures with Twisted Light
Advanced Materials, EarlyView.We demonstrate dynamic control of ferroelectric order in quasi‐2D CsBiNb2O7 using twisted ultraviolet light carrying orbital angular momentum. Our approach harnesses non‐resonant multiphoton absorption and induced strain to modulate topological of ferroelectric polarization textures.
Nimish P. Nazirkar +10 more
wiley +1 more source
The solution to a nonlinear Lamm equation in the Faxn approximation
, 1966 Irwin H. Billick, George H. Weiss
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Enhanced Polariton Interactions in Suspended WS2 Monolayer Microcavity
Advanced Materials, EarlyView.Monolayers of transition‐metal dichalcogenides exhibit strong exciton resonances for light‐matter interactions at RT, though substrate effects limit performance. This work presents a planar microcavity with a suspended WS2 monolayer, eliminating substrate‐induced losses.
Laura Polimeno +9 more
wiley +1 more source
Successive Approximations in Ordered Vector Spaces and Global Solutions of Nonlinear Volterra Integral Equations [PDF]
, 1972 Terrence S. McDermott
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Photonic Nanomaterials for Wearable Health Solutions
Advanced Materials, EarlyView.This review discusses the fundamentals and applications of photonic nanomaterials in wearable health technologies. It covers light‐matter interactions, synthesis, and functionalization strategies, device assembly, and sensing capabilities. Applications include skin patches and contact lenses for diagnostics and therapy. Future perspectives emphasize AI‐
Taewoong Park +3 more
wiley +1 more source
On‐Chip Active Supercoupled Topological Cavity
Advanced Materials, EarlyView.The on‐chip supercoupled cavity device is demonstrated realizing a record cavity excitation distance exceeding three wavelengths, leveraging the valley‐conserved supercoupling mechanism in the valley Hall topological system. This optothermal tunable design enables new degrees of freedom for supercoupled photonic cavities in mux‐demux, lasers, sensors ...
Ridong Jia +7 more
wiley +1 more source