Results 81 to 90 of about 33,386 (301)

Lorentzian Operator for Angular Source Localization with Large Array

open access: yesJournal of Telecommunications and Information Technology, 2015
Source localization problem consists of an ensemble of techniques that are used to obtain spatial information of present radiation in given medium of propagation, with a constraint of the antenna geometry and the characteristics of radiating sources ...
Said Safi, Miloud Frikel
doaj   +1 more source

First Observations of Narrowband Stimulated Electromagnetic Emissions at the Pump Frequency Second Harmonic During Ionosphere Interaction Experiments

open access: yesGeophysical Research Letters, 2018
Reported herein are first observations of narrowband stimulated electromagnetic emissions (NSEEs) within ±30 Hz of the second harmonic of the pump wave frequency during ionospheric heating experiments at the High Frequency Active Auroral Research Program
A. D. Yellu   +5 more
doaj   +1 more source

SWIFT: A Narrowband-Friendly Cognitive Wideband Network [PDF]

open access: yes, 2008
Wideband technologies in the unlicensed spectrum can satisfy the ever-increasing demands for wireless bandwidth created by emerging rich media applications. The key challenge for such systems, however, is to allow narrowband technologies that share these
Rahul, Hariharan   +4 more
core  

Filterless narrowband visible photodetectors [PDF]

open access: yes, 2015
Wavelength selective light detection is crucial for many applications such as imaging and machine vision. Narrowband spectral responses are required for colour discrimination and current systems use broadband photodiodes combined with optical filters ...
Ardalan Armin   +3 more
core   +1 more source

Intrinsic Narrowband Organic Afterglow

open access: yes
Narrowband organic afterglow materials show application in multiplexed bioimaging and others. However, materials featuring an intrinsic narrowband afterglow with an emission lifetime >100 ms remain elusive. We report a serendipitous finding of a chemical
Jiuyang Li (11773251)   +8 more
core   +1 more source

Narrowband Monolithic Perovskite–Perovskite Tandem Photodetectors

open access: yes, 2022
Narrowband photodetectors (PDs) are sought after for many applications requiring selective spectral response. The most common systems combine optical bandpass filters with broadband photodiodes.
Martínez-Goyeneche, Lucía   +11 more
core   +1 more source

Recent Advances in Stimulated Brillouin Scattering in Integrated Photonics

open access: yesAdvanced Physics Research, EarlyView.
This review systematically surveys recent advances in stimulated Brillouin scattering (SBS) within integrated photonics. It begins by elucidating the fundamental mechanisms of stimulated coupling between photons and acoustic phonons in nanoscale waveguides, enhanced by the photoelastic and moving boundary effects.
Songyue Liu   +8 more
wiley   +1 more source

High-Efficiency and Narrowband Green Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes Based on Two Diverse Boron Multi-Resonant Skeletons

open access: yesMolecules
Up to now, highly efficient narrowband thermally activated delayed fluorescence (TADF) molecules constructed by oxygen-bridged boron with an enhancing multiple resonance (MR) effect have been in urgent demand for solid-state lighting and full-color ...
Zhen Wang   +5 more
doaj   +1 more source

Spectral Response Modelling of Multilayer Graphene/Quantum Dot Heterostructures

open access: yesAdvanced Physics Research, EarlyView.
The spectral response of a multilayer heterostructure device with multiple layers of graphene and photosensitizers of different bandgaps (ZnO and quantum dots) is simulated and validated with experimental data. Our simulation incorporates photon absorption by the photosensitizers and charge collection by graphene, capturing the photoresponse dependence
Ju Ying Shang   +2 more
wiley   +1 more source

A new method of narrowband interference suppression of partial discharge signal based on resonance sparse decompositio

open access: yesGong-kuang zidonghua, 2015
For problem that partial discharge signal of electrical equipment is easy to be overwhelmed by narrowband interference signal in field operation environment, and is difficult to extract, a new method of narrowband interference suppression of partial ...
WANG Hongtao, ZHENG Naiqing, LIU Huijun
doaj   +1 more source

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