Results 1 to 10 of about 281,745 (348)

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

E3S 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, Lv Shuai, Wu Zhongpeng, Zhang Mingwei, Bai Jin   +4 more
doaj   +1 more source

Underwater Caging and Capture for Autonomous Underwater Vehicles [PDF]

Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020
To be appear in: Proceedings of Global OCEANS ...
Özkahraman, Özer, Ögren, Petter
openaire   +4 more sources

Autonomous Underwater Vehicles and Field of View in Underwater Operations [PDF]

Journal of Marine Science and Engineering, 2021
Submarine inspections and surveys require underwater vehicles to operate in deep waters efficiently, safely and reliably. Autonomous Underwater Vehicles employing advanced navigation and control systems present several advantages. Robust control algorithms and novel improvements in positioning and navigation are needed to optimize underwater operations.
Isaac Segovia Ramírez, Pedro José Bernalte Sánchez, Mayorkinos Papaelias, Fausto Pedro García Márquez   +3 more
openaire   +3 more sources

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

Journal 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, Basit Iqbal, Imran Ullah Khan, Niaz Ahmed, Gang Qiao, Feng Zhou   +5 more
doaj   +1 more source

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

Journal 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, Teng Ma, Ye Li, Mingxiao Yuan, Yu Ling, Haohan Du, Chi Qi, Ziyuan Li, Shuo Xu, Qiang Zhang   +9 more
doaj   +1 more source

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

Journal 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

Ultra Low Frequency Wave Produced by Underwater Oscillating Sphere and Its Measurement

Journal of Marine Science and Engineering, 2021
When an underwater target moves in viscous fluid, it may cause the periodic movement of the surrounding fluid and generate ultra-low-frequency (ULF) gravity waves.
Huan Wang, Erzheng Fang, Mingze Wu, Lianjin Hong, Zongru Li   +4 more
doaj   +1 more source

Spatial focusing algorithm for source enumeration with rotating uniform circular sonar arrays

IET Radar, Sonar & Navigation, 2023
Source enumeration with large snapshots is feasible for a static uniform circular sonar array (UCSA). However, the dimension of the signal subspace in the array coordinate system exceeds the number of signal sources due to the rotation of the UCSA, which
Guolong Liang, Guolong Liu, Yu Hao, Nan Zou, Chunpeng Zhao   +4 more
doaj   +1 more source

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

E3S 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, Cheng Dong, Chang Shuli, Li Pengtao   +3 more
doaj   +1 more source

Analysis of Underwater Acoustic Propagation under the Influence of Mesoscale Ocean Vortices

Journal of Marine Science and Engineering, 2021
Mesoscale ocean vortices are common phenomenon and fairly distributed over the global oceans. In this study, mesoscale vortex in the South China Sea is identified by processing of AIPOcean data.
Sartaj Khan, Yang Song, Jian Huang, Shengchun Piao   +3 more
doaj   +1 more source