Results 41 to 50 of about 172,332 (339)

A Hybrid Spectrum Access Strategy with Channel Bonding and Classified Secondary User Mechanism in Multichannel Cognitive Radio Networks

open access: yesSensors, 2019
Cognitive radio networks (CRNs) can improve spectrum utilization by allowing secondary users (SUs) to dynamically access channels unoccupied by primary users (PUs).
Yuan Zhao, Minglei Peng, Jiemin Liu
doaj   +1 more source

Development of Wearable Wireless Multichannel f-NIRS System to Evaluate Activities

open access: yesMicromachines
Functional near-infrared spectroscopy is a noninvasive neuroimaging technique that uses optical signals to monitor subtle changes in hemoglobin concentrations within the superficial tissue of the human body. This technology has widespread applications in
Xiaojie Ma   +6 more
doaj   +1 more source

NOMA-Based Random Access With Multichannel ALOHA [PDF]

open access: yesIEEE Journal on Selected Areas in Communications, 2017
In nonorthogonal multiple access (NOMA), the power difference of multiple signals is exploited for multiple access and successive interference cancellation is employed at a receiver to mitigate co-channel interference.
Jinho Choi
semanticscholar   +1 more source

An Analysis of Satellite Multichannel Differential Code Bias for BeiDou SPP and PPP

open access: yesRemote Sensing, 2023
Differential code bias (DCB) of satellite is an error that cannot be ignored in precise positioning, timing, ionospheric modeling, satellite clock correction, and ambiguity resolution. The completion of the third generation of BeiDou Navigation Satellite
Guangxing Wang   +4 more
doaj   +1 more source

Investigation into the Effect of Interchannel Crosstalk in Multichannel Microphone Technique [PDF]

open access: yes
A series of subjective listening tests were carried out in order to investigate the effect of interchannel crosstalk in multichannel microphone technique.
Lee, Hyunkook, Rumsey, Francis
core   +4 more sources

Presse régionale et multisupports

open access: yesTic & Société, 2012
This article retraces the path followed  by a regional daily in France in diversifying its activities and enlisting its workers in the task of mastering a multichannel journalism.
Denis RUELLAN, Joël LANGONNE
doaj   +1 more source

Four-channel display and encryption by near-field reflection on nanoprinting metasurface

open access: yesNanophotonics, 2022
Multichannel metasurfaces become one of the most significant development trends, as they exhibit versatile manipulation abilities on electromagnetic fields and provide a promising approach to constitute compact devices with various complex functions ...
Cao Yue   +4 more
doaj   +1 more source

Anomaly Detection in Multichannel Data Using Sparse Representation in RADWT Frames

open access: yesMathematics, 2021
We introduce a new methodology for anomaly detection (AD) in multichannel fast oscillating signals based on nonparametric penalized regression. Assuming the signals share similar shapes and characteristics, the estimation procedures are based on the use ...
Daniela De Canditiis, Italia De Feis
doaj   +1 more source

Integration of Low‐Voltage Nanoscale MoS2 Memristors on CMOS Microchips

open access: yesAdvanced Functional Materials, EarlyView.
This article presents the first monolithic integration of nanoscale MoS2‐based memristors into the back‐end‐of‐line of foundry‐fabricated CMOS microchips in a one‐transistor‐one‐resistor (1T1R) architecture. The MoS2‐based 1T1R cells exhibit forming‐free, nonvolatile resistive switching with ultra‐low operating voltages, low cycle‐to‐cycle variability ...
Jimin Lee   +16 more
wiley   +1 more source

Multichannel Deep Attention Neural Networks for the Classification of Autism Spectrum Disorder Using Neuroimaging and Personal Characteristic Data

open access: yesComplex, 2020
Autism spectrum disorder (ASD) is a developmental disorder that impacts more than 1.6% of children aged 8 across the United States. It is characterized by impairments in social interaction and communication, as well as by a restricted repertoire of ...
Ke Niu   +6 more
semanticscholar   +1 more source

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