Results 31 to 40 of about 18,238 (168)

Terahertz Resonances of Transverse Standing Waves in a Corrugated Plate Waveguide

open access: yesIEEE Photonics Journal, 2022
Terahertz (THz) propagation in periodic structures has attracted great attention because of its captivating electrical and optical properties. However, the created THz band gaps are usually considered to be caused by Bragg resonances.
Jing Ma   +5 more
doaj   +1 more source

Multi‐band joint local sparse tracking via wavelet transforms

open access: yesIET Computer Vision, 2016
A novel multi‐band joint local sparse tracking algorithm via wavelet transforms is proposed in this study. The object image may contain rich information of different types; the authors use wavelet transforms to decompose the object image into some sub ...
Guang Han   +5 more
doaj   +1 more source

A Low-Cost Multibeam Switching Antenna Using Reconfigurable Hybrid Metasurface for Beamforming Applications

open access: yesMicromachines, 2023
In this paper, we proposed a multibeam switching antenna based on a low-cost reconfigurable hybrid metasurface applied for beamforming systems. The antenna consists of two parts: a microstrip feed antenna and a transmission hybrid metasurface. The latter
Lili Sheng   +4 more
doaj   +1 more source

EZR-MZR Resonators for Compact Low-Profile Omnidirectional Circular-Polarized Antenna Design

open access: yesIEEE Photonics Journal, 2017
New zeroth-order resonator (ZOR): the curved EZR-MZR resonator [epsilon-zero resonance (EZR) and mu-zero resonance (MZR)] was proposed for circular-polarized (CP) antenna design with low-profile and omnidirectional characteristics.
Lin Peng   +4 more
doaj   +1 more source

Graphene-Based Magnetically Tunable Broadband Terahertz Absorber

open access: yesIEEE Photonics Journal, 2022
This study proposes a broadband absorber based on graphene and one-dimensional photonic crystal (1DPC) to achieve magnetically tunable broadband absorption in the terahertz (THz) frequency range.
Zhenyan Wei   +4 more
doaj   +1 more source

Cluster Content Caching: A Deep Reinforcement Learning Approach to Improve Energy Efficiency in Cell-Free Massive Multiple-Input Multiple-Output Networks

open access: yesSensors, 2023
With the explosive growth of micro-video applications, the transmission burden of fronthaul and backhaul links is increasing, and meanwhile, a lot of energy consumption is also generated.
Fangqing Tan, Yuan Peng, Qiang Liu
doaj   +1 more source

Multi-Target Tracking Based on High-Order Appearance Feature Fusion

open access: yesIEEE Access, 2019
Multi-target tracking (MTT) is among the fundamental problems in the field of video analysis and monitoring. In the tracking-by-detection framework, data association is one of the most important and difficult problems.
Guang Han, Yan Gao, Ning Sun
doaj   +1 more source

Ultra-wideband Concurrent Ranging [PDF]

open access: yesACM Transactions on Sensor Networks, 2020
We propose a novel concurrent ranging technique for distance estimation with ultra-wideband (UWB) radios. Conventional schemes assume that the necessary packet exchanges occur in isolation to avoid collisions. Concurrent ranging relies on the overlapping of replies from nearby responders to ...
Pablo Corbalán, Gian Pietro Picco
openaire   +3 more sources

Cooperative Use of Recurrent Neural Network and Siamese Region Proposal Network for Robust Visual Tracking

open access: yesIEEE Access, 2021
In order to solve the problems of unbalanced sample data and the lack of consideration of temporal information in existing Siamese-based trackers, this paper proposes a Siamese recurrent neural network and region proposal network (Siamese R-RPN), which ...
Xuechen Zhao, Yaoming Liu, Guang Han
doaj   +1 more source

A Metamaterial-Based Cross-Polarization Converter Characterized by Wideband and High Efficiency

open access: yesCrystals, 2022
Metamaterial-based polarization converters, which have all kinds of polarizations realizable via adjusting metamaterial parameters, have been springing up at an increasing rate. However, the reported metamaterial-based polarization converters suffer from
Yannan Jiang   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy