Results 1 to 10 of about 439,852 (337)

Study on measurement of sound attenuation coefficient in bubble wake by pool [PDF]

open access: yesE3S Web of Conferences, 2020
In this paper, bubbles are generated by controlling the air inlet volume of the ceramic tube array with a gas divider valve. Stimulation tests of sound attenuation characteristics of the wake of bubbles in a laboratory pool are performed.
Han Jing   +4 more
doaj   +1 more source

Experimental Results of Magnetic Communication Using the Giant Magnetoimpedance Receiver in Underwater Environments [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2023
This letter presents the topology of a novel approach to magnetic communication using a giant magnetoimpedance (GMI)-based receiver with a GMI sensor in underwater media such as freshwater.
Jang-Yeol Kim   +4 more
doaj   +1 more source

Full Duplex Physical and MAC Layer-Based Underwater Wireless Communication Systems and Protocols: Opportunities, Challenges, and Future Directions

open access: yesJournal of Marine Science and Engineering, 2021
Underwater wireless communication has gained a great deal of attention in the last couple of decades because of its applications in the military, industrial, and monitoring sectors.
Liu Songzuo   +5 more
doaj   +1 more source

A Storage-Saving Quadtree-Based Multibeam Bathymetry Map Representation Method

open access: yesJournal of Marine Science and Engineering, 2023
With the rapid advancement of the simultaneous localization and mapping (SLAM) technology, the collaboration of several autonomous underwater vehicles (AUVs) in large-scale seafloor imaging has become a trending topic. Electromagnetic waves are difficult
Zheng Cong   +9 more
doaj   +1 more source

A Variational Bayesian-Based Simultaneous Localization and Mapping Method for Autonomous Underwater Vehicle Navigation

open access: yesJournal of Marine Science and Engineering, 2022
Simultaneous Localization and Mapping (SLAM) is a well-known solution for mapping and realizing autonomous navigation of an Autonomous Underwater Vehicle (AUV) in unknown underwater environments.
Pengcheng Mu, Xin Zhang, Ping Qin, Bo He
doaj   +1 more source

Performance Evaluation of Routing Protocols for Underwater Wireless Sensor Networks

open access: yesJournal 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

Sensitivity analysis of underwater launch based on Morris method [PDF]

open access: yesE3S Web of Conferences
The discharge velocity, pressure difference and acceleration of underwater launch performance are affected by many factors, including depth, sailing speed, burning rate, water temperature, density and other operating parameters.
Xie Jian   +3 more
doaj   +1 more source

3DupIC: An Underwater Scan Matching Method for Three-Dimensional Sonar Registration

open access: yesSensors, 2022
This work presents a six degrees of freedom probabilistic scan matching method for registration of 3D underwater sonar scans. Unlike previous works, where local submaps are built to overcome measurement sparsity, our solution develops scan matching ...
António Ferreira   +4 more
doaj   +1 more source

An Improved Azimuth Angle Estimation Method with a Single Acoustic Vector Sensor Based on an Active Sonar Detection System

open access: yesSensors, 2017
In this paper, an improved azimuth angle estimation method with a single acoustic vector sensor (AVS) is proposed based on matched filtering theory. The proposed method is mainly applied in an active sonar detection system.
Anbang Zhao, Lin Ma, Xuefei Ma, Juan Hui
doaj   +1 more source

Resonance Control Based on Hydrodynamic Analysis for Underwater Direct Drive Wave Energy Converter

open access: yesJournal of Marine Science and Engineering, 2021
Wave energy has great prospect among many forms of marine renewable energy for its high density and storage. This paper proposes an underwater direct drive wave energy converter (UDDWEC), which is composed of a submerged point absorbing buoy and a linear-
Yang Li   +4 more
doaj   +1 more source

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