Results 91 to 100 of about 504,597 (395)
Passive Tracking of Multiple Underwater Targets in Incomplete Detection and Clutter Environment
Entropy, 2021 A major advantage of the use of passive sonar in the tracking multiple underwater targets is that they can be kept covert, which reduces the risk of being attacked.
Xiaohua Li, Bo Lu, Wasiq Ali, Haiyan Jin
doaj +1 more source
CDMA for Underwater Acoustic Communication [PDF]
arXiv, 2021 This paper provides an overview of how and why acoustic waves are important for underwater communication when compared with radio and optical waves, underwater acoustic channel, it's characteristics and model. Also about the underwater sensor architecture, challenges faced by sensor nodes in the network and Media Acess Control(MAC) protocol solutions ...
arxiv
Active vibration control for underwater signature reduction of a navy ship [PDF]
, 2010 Dutch navy ships are designed and built to have a low underwater signature. For low frequencies however, tonal vibrations of a gearbox can occur, which might lead to increased acoustic signatures. These vibrations are hard to reduce by passive means.
Basten, Tom +2 more
core +2 more sources
An Overview of Underwater Vision Enhancement: From Traditional Methods to Recent Deep Learning
Journal of Marine Science and Engineering, 2022 Underwater video images, as the primary carriers of underwater information, play a vital role in human exploration and development of the ocean. Due to the optical characteristics of water bodies, underwater video images generally have problems such as ...
Kai Hu +4 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun +7 more
wiley +1 more source
Underwater Multi-Vehicle Trajectory Alignment and Mapping Using Acoustic and Optical Constraints
Sensors, 2016 Multi-robot formations are an important advance in recent robotic developments, as they allow a group of robots to merge their capacities and perform surveys in a more convenient way.
Ricard Campos, Nuno Gracias, Pere Ridao
doaj +1 more source
Generating and Detecting Broad-Band Underwater Multiple OAMs Based on Water-Immersed Array
IEEE Access, 2020 In this paper, we focus on the generation of broadband underwater vortex waves carrying multiple OAMs. Based on a wideband underwater antenna, a water-immersed horn antenna array is designed and tested.
Yang Yang +10 more
doaj +1 more source
Performance Evaluation of Routing Protocols for Underwater Wireless Sensor Networks
Journal of Marine Science and Engineering, 2022 Underwater Wireless Sensor Networks (UWSNs) are emerging technology for disclosing multiple applications, such as oil, earth quick, and marine environments. All sensor nodes deployed in UWSNs operate through limited power batteries.
Taj Rahman +5 more
doaj +1 more source
Deep Learning for Visual Navigation of Underwater Robots [PDF]
arXiv, 2023 This paper aims to briefly survey deep learning methods for visual navigation of underwater robotics. The scope of this paper includes the visual perception of underwater robotics with deep learning methods, the available visual underwater datasets, imitation learning, and reinforcement learning methods for navigation. Additionally, relevant works will
arxiv
Advanced Functional Materials, EarlyView.This study presents a novel approach to designing and fabricating high‐porosity 3D‐printed scaffolds using a customized resin. Scaffold geometry, cellular interactions, and mechanical properties are analyzed to demonstrate these engineered bone models.
Sera Choi +6 more
wiley +1 more source