Results 51 to 60 of about 37,526 (264)

An Underwater SLAM System using Sonar, Visual, Inertial, and Depth Sensor

, 2019
This paper presents a novel tightly-coupled keyframe-based Simultaneous Localization and Mapping (SLAM) system with loop-closing and relocalization capabilities targeted for the underwater domain.
Li, Alberto Quattrini, Rahman, Sharmin, Rekleitis, Ioannis   +2 more
core   +1 more source

Development and testing of a dual accelerometer vector sensor for AUV acoustic surveys [PDF]

, 2017
This paper presents the design, manufacturing and testing of a Dual Accelerometer Vector Sensor (DAVS). The device was built within the activities of theWiMUST project, supported under the Horizon 2020 Framework Programme, which aims to improve the ...
Agni Mantouka, Barr, Friedrich Zabel, Luís Sebastião, Mário Saleiro, Paulo Felisberto, Paulo Santos, Peng, Sherman, Sérgio Jesus, Widmaier   +10 more
core   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source

A Physiological Microfluidic Blood–Brain‐Barrier Model for In Vitro Study of Nanoparticle Trafficking and Accumulation

Advanced Healthcare Materials, EarlyView.
A human microfluidic blood‐brain barrier (mBBB) model enables spatially resolved comparison of nanoparticle trafficking. Extracellular vesicles (EVs), liposomes, and nanoplastics exhibit distinct transport and disruption behaviors, revealing that membrane composition and uptake pathways govern BBB interaction.
Bryan B. Nguyen, Neona M. Lowe, Sophia Kellogg, Kuan‐Wei Huang, Hannah O'Toole, Elizabeth J. Hale, Venktesh S. Shirure, Bhupinder S. Shergill, Steven C. George, Randy P. Carney   +9 more
wiley   +1 more source

Autonomous underwater vehicle depth control based on an improved active disturbance rejection controller

International Journal of Advanced Robotic Systems, 2019
Large fluctuation, large overshoot, and uncertain external disturbance that occur when an autonomous underwater vehicle is in deep motion are difficult to address using the traditional control method.
Zhengzheng Zhang, Bingyou Liu, Lichao Wang   +2 more
doaj   +1 more source

System Identification and Controller Design of a Novel Autonomous Underwater Vehicle

Machines, 2021
Autonomous underwater vehicle is an effective tool for humans to explore the ocean. It can be used for the monitoring of underwater structures and facilities, which puts forward more accurate and stable requirements for the system operation of the ...
Baoju Wu, Xiaowei Han, Nanmu Hui
doaj   +1 more source

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Research on autonomous underwater vehicle wall following based on reinforcement learning and multi-sonar weighted round robin mode

International Journal of Advanced Robotic Systems, 2020
When autonomous underwater vehicle following the wall, a common problem is interference between sonars equipped in the autonomous underwater vehicle. A novel work mode with weighted polling (which can be also called “weighted round robin mode”) which can
Xiangbin Wang, Guocheng Zhang, Yushan Sun, Lei Wan, Jian Cao   +4 more
doaj   +1 more source

A Robust Model Predictive Control Approach for Autonomous Underwater Vehicles Operating in a Constrained workspace

, 2018
This paper presents a novel Nonlinear Model Predictive Control (NMPC) scheme for underwater robotic vehicles operating in a constrained workspace including static obstacles.
Heshmati-alamdari, Shahab, Karras, George C., Kyriakopoulos, Kostas J., Marantos, Panos   +3 more
core   +2 more sources

Estimating oceanic primary production using vertical irradiance and chlorophyll profiles from ocean gliders in the North Atlantic [PDF]

, 2015
An autonomous underwater vehicle (Seaglider) has been used to estimate marine primary production (PP) using a combination of irradiance and fluorescence vertical profiles.
Adrian P. Martin, Andrew F. Thompson, Damerell G. M., Davis R. E., Eleanor Frajka-Williams, Eriksen C. C., Gillian Damerell, Kirk J. T. O., Liss P. S., Mobley C. D., Platt T., Stuart C. Painter, Timothy J. Smyth, Victoria S. Hemsley   +13 more
core   +4 more sources