Results 21 to 30 of about 632,387 (252)

A Multi-Spatial Scale Ocean Sound Speed Prediction Method Based on Deep Learning

Journal of Marine Science and Engineering
As sound speed is a fundamental parameter of ocean acoustic characteristics, its prediction is a central focus of underwater acoustics research. Traditional numerical and statistical forecasting methods often exhibit suboptimal performance under complex ...
Yu Liu, Benjun Ma, Zhiliang Qin, Cheng Wang, Chao Guo, Siyu Yang, Jixiang Zhao, Yimeng Cai, Mingzhe Li   +8 more
doaj   +1 more source

Robust Wideband DOA Estimation Based on Element-Space Data Reconstruction in a Multi-Source Environment

IEEE Access, 2021
In the presence of multiple sources, the performance of direction-of-arrival (DOA) estimation based on beam power maximization is susceptible to the energy leaking from the interference beams to the target beam, especially in the case that the signal of ...
Chuanqi Zhu, Shiliang Fang, Qisong Wu, Liang An, Xinwei Luo   +4 more
doaj   +1 more source

Research Progress on Hydrophone Elements and Their Applications in Towed Line Arrays and Imaging Sonar for Underwater Detection

Inventions
Driven by growing marine exploitation and maritime security demands, underwater detection systems impose stringent performance requirements for deep-sea early warning, seabed resource exploration and underwater infrastructure inspection.
Yifan Li, Wei Gao, He Liu, Ping Cui, Xiaohuan Li, Lianjia Zhao, Yongyao Chen   +6 more
doaj   +1 more source

Improved high-precision approach based on deconvolution in MIMO sonar imagery

The Journal of Engineering, 2019
Multiple-input multiple-output (MIMO) sonar enables high-resolution imaging, which is extremely useful in underwater acoustic high-precision imagery.
Lu Yan, Shengchun Piao, Feng Xu
doaj   +1 more source

Advancing Human Skin Equivalents: The Crucial Role of Neurovascular Integration

Advanced Healthcare Materials, EarlyView.
This review discusses the importance of integrating vascular and peripheral nerve systems into human skin equivalents (HSEs) to better recapitulate native skin physiology. Recent advances in vascularized, innervated, and neurovascularized HSEs are highlighted, together with emerging bioengineering strategies, current challenges, and future ...
Hao Wu, Lorenzo Moroni, Nicolas Lebonvallet, Vincent Flacher, Paul Wieringa   +4 more
wiley   +1 more source

Using High-Order Particle Velocity Gradient Polarization Characteristics to Detect Underwater Coherent Interference

Journal of Marine Science and Engineering, 2023
Detection of underwater coherent interference is necessary as its presence affects the estimation of the desired target. In this work, a method based on high-order particle velocity gradient polarization characteristics is proposed to distinguish the ...
Di Wu, Lanyue Zhang, Jia Wang, Xueru Hu
doaj   +1 more source

Soft and Transient Bioelectronics Enabled by Polymer‐Free Ti3C2Tx MXene Hydrogels

Advanced Materials, EarlyView.
We present Ti3C2Tx MXene hydrogel (MXgel) bioelectronics, a soft, flexible, and fully transient platform for high‐fidelity neural recording and stimulation. MXgel bioelectronics exhibit exceptional electrical conductivities, low electrochemical impedances, and high charge injection capacities.
Raghav Garg, Franco A. Laimo, Stefano Ippolito, Prastuti Upadhyay, Spencer R. Averbeck, Dimitris Boufidis, Charles‐Antoine Assenmacher, Dayo O. Adewole, Sai Panigrahy, Bita Soltan Mohammadlou, Lucy Plant, Yuan Zhang, Andrew G. Richardson, Yury Gogotsi, D. Kacy Cullen, Flavia Vitale   +15 more
wiley   +1 more source

A Spatially Fair and Low Conflict Medium Access Control Protocol for Underwater Acoustic Networks

Journal of Marine Science and Engineering, 2023
The large propagation delay in underwater acoustic networks results in spatial and temporal uncertainty between communication links. This uncertainty, in turn, leads to problems with spatial unfairness and packet collision in media access control (MAC ...
Maochun Zheng, Wei Ge, Xiao Han, Jingwei Yin   +3 more
doaj   +1 more source

A Secure Communication Suite for Underwater Acoustic Sensor Networks [PDF]

, 2012
In this paper we describe a security suite for Underwater Acoustic Sensor Networks comprising both fixed and mobile nodes. The security suite is composed of a secure routing protocol and a set of cryptographic primitives aimed at protecting the ...
Dini, Gianluca, Lo Duca, Angelica, Lo Duca A., Angelica Lo Duca, Gianluca Dini, Lo Duca Angelica, Dini Gianluca   +6 more
core   +1 more source

Low‐Outgassing Liquid Metal–Silicone Composites for Multifunctional Space Applications

Advanced Materials Technologies, EarlyView.
Integrating liquid metal microdroplets into a space‐grade silicone creates a multifunctional composite while preserving its inherent flexibility and low‐outgassing behavior. The composite has 11×$\times$ higher thermal conductivity while remaining thermally stable and maintaining a total mass loss of ≤$\le$ 1% under thermal vacuum testing.
Spencer Pak, Matthew R. Jamison, Cadré J. Francis, Ravi Tutika, Stephen A. Morin, Eric J. Markvicka   +5 more
wiley   +1 more source