Results 1 to 10 of about 429,159 (173)

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

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

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

Journal 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, Hyun Joon Lee, Jung Hoon Oh, Jae-Ho Lee, In-Kui Cho   +4 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

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

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

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

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

Sensors, 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

Cellular Underwater Wireless Optical CDMA Network: Potentials and Challenges [PDF]

, 2016
Underwater wireless optical communications is an emerging solution to the expanding demand for broadband links in oceans and seas. In this paper, a cellular underwater wireless optical code division multiple-access (UW-OCDMA) network is proposed to ...
Akhoundi, Farhad, Banihassan, Navid, Beyranvand, Hamzeh, Jamali, Mohammad Vahid, Minoofar, Amir, Salehi, Jawad A.   +5 more
core   +2 more sources