Results 71 to 80 of about 75,227 (355)

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

Advanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas, Ankan Dutta, Shuvendu Das, Abu Musa Abdullah, Wanqing Zhang, Fatema Tuz Zohra, Huanyu Cheng   +6 more
wiley   +1 more source

STLFM Signal Based Adaptive Synchronization for Underwater Acoustic Communications

IEEE Access, 2019
In underwater acoustic communications (UAC), signal synchronization plays a key role in the performance. It is usually performed using a known preamble transmitted prior to the data. However, the underwater acoustic (UWA) channel is characterized as time-
Fei Yuan, Zhenyu Jia, Jianghui Li, En Cheng   +3 more
doaj   +1 more source

Performance of OFDM-based massive MIMO OTFS systems for underwater acoustic communication

IET Communications, 2020
In this study, multi-user (MU) underwater acoustic communication is investigated using massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM)-based orthogonal time frequency space modulation (OTFS) systems.
M. J. Bocus, A. Doufexi, D. Agrafiotis
semanticscholar   +1 more source

Broadband Acoustic Communication Aided Underwater Inertial Navigation System

IEEE Robotics and Automation Letters, 2022
We present an underwater localization system for small Autonomous Underwater Vehicles (AUVs) that leverages a broadband wireless acoustic communication system for GPS-denied underwater localization.
Jae-Won Choi, A. Borkar, A. Singer, Girish V. Chowdhary   +3 more
semanticscholar   +1 more source

Chemically Programmable Underwater Sound‐Absorbing Metamaterial via MXene Self‐Assembly

Advanced Science, EarlyView.
MXene self‐assembly creates a chemically programmable underwater metamaterial with quasi‐periodic layers and a chemical‐physical multi‐level constraint system. A crosslinker as a ‘chemical scissor’ precisely edits microscopic interactions, exciting deep‐subwavelength strong local resonances that induce near‐zero/negative effective bulk modulus (Keff ...
Ziwen Gan, Ranran Qi, Mingyi Liao, Bowen Chen, Chen Cheng, Wei Tu   +5 more
wiley   +1 more source

Underwater Communication Using Acoustic Parametric Arrays [PDF]

The 4th International Electronic Conference on Sensors and Applications, 2017
This paper presents a study of different types of parametric signals with application to submarine acoustic telecommunications. In all of them, the carrier frequency is 200 kHz, which corresponds to that resonation of the transducer under study, while they differ by the different modulations they present. In this sense, we study modulations with sweeps
Miguel Ardid, María Campo-Valera, Dídac Tortosa, Ivan Felis, Carlos Llorens, Juan Martínez-Mora   +5 more
openaire   +5 more sources

Deep Learning-Based Signal Detection for Underwater Acoustic OTFS Communication

Journal of Marine Science and Engineering, 2022
Orthogonal time frequency space (OTFS) is a novel two-dimensional (2D) modulation technique that provides reliable communications over time- and frequency-selective channels.
Yuzhi Zhang, Shumin Zhang, Bing Wang, Yang Liu, Weigang Bai, Xiaohong Shen   +5 more
semanticscholar   +1 more source

Super‐Resolution and High‐Data‐Density Acoustic Meta‐Hologram via Amplitude and Phase Coupling

Advanced Science, EarlyView.
A super‐resolution acoustic meta‐hologram utilizes amplitude‐phase coupling under energy conservation constraints to overcome the traditional diffraction limit. This conceptually advanced approach achieves high‐fidelity acoustic field reconstruction and dense information transmission, unlocking new potentials for high‐resolution acoustic imaging and ...
Xiao Guo, Xinzong Wang, Guoshen Tang, Haohan Zeng, Siqi Fan, Xinghao Hu, Youyu Mo, Zhenyu He, Tingting Li, Hui Xu, Jiao Shen, Haiyan Fan, Xiaoxiang Gao, Yifan Zhu, Hui Zhang, Badreddine Assouar   +15 more
wiley   +1 more source

A Low-Complexity Underwater Acoustic Coherent Communication System for Small AUV

Remote Sensing, 2022
While underwater acoustic (UWA) communication offers a practical way to establish a wireless link with underwater vehicles, designing a UWA communication system onboard a small autonomous underwater vehicle (AUV) still poses significant challenges.
Weihua Jiang, Xiaoyu Yang, F. Tong, Yijun Yang, Tianhua Zhou   +4 more
semanticscholar   +1 more source

Molecular and Cellular Hallmarks of Age‐Related Vestibular Hair Cell Degeneration

Advanced Science, EarlyView.
This study utilizes single‐cell RNA‐seq transcriptomes, advanced imaging, and electrophysiology to examine universal and cell‐type‐specific aging signatures of vestibular hair cells. The study shows that impaired hair bundle function is a key driver of age‐related vestibular dysfunction.
Samadhi Kulasooriya, Huizhan Liu, Sarath Vijayakumar, Celia Bloom, Zhenhang Xu, Shu Tu, Benjamin J. Borgmeier, Mi Zhou, Litao Tao, Bechara Kachar, David Z. He   +10 more
wiley   +1 more source