Results 21 to 30 of about 1,425,062 (351)

The Effect of Mesoscale Eddy on the Characteristic of Sound Propagation

Journal of Marine Science and Engineering, 2021
A mesoscale eddy is detected and tracked in the western North Pacific region. Within the life cycle of the cyclonic eddies, the intensities of eddies make a difference. Satellite images indicate the oceanic eddy keeps westward-moving until it disappears.
Jiaqi Liu, Shengchun Piao, Lijia Gong, Minghui Zhang, Yongchao Guo, Shizhao Zhang   +5 more
doaj   +1 more source

Design and Experiments of a Portable Seabed Integrated Detection Sonar

Sensors, 2021
The integrated observation of seabed topography, sediment geomorphology and sub-bottom profile information is very important for seabed remote sensing and mapping.
Jingxin Ma, Haisen Li, Jianjun Zhu, Weidong Du, Chao Xu, Xinyang Wang   +5 more
doaj   +1 more source

Symmetric Connectivity of Underwater Acoustic Sensor Networks Based on Multi-Modal Directional Transducer

Sensors, 2021
Topology control is one of the most essential technologies in wireless sensor networks (WSNs); it constructs networks with certain characteristics through the usage of some approaches, such as power control and channel assignment, thereby reducing the ...
Gang Qiao, Qipei Liu, Songzuo Liu, Bilal Muhammad, Menghua Wen   +4 more
doaj   +1 more source

Sparse Bayesian Learning for Channel Estimation in Time-Varying Underwater Acoustic OFDM Communication

IEEE Access, 2018
In this paper, we study the sparse Bayesian learning (SBL) framework for channel estimation in underwater acoustic (UWA) orthogonal frequency-division multiplexing (OFDM) communication systems, which provides a desirable property of preventing structural
Gang Qiao, Qingjun Song, Lu Ma, Songzuo Liu, Zongxin Sun, Shuwei Gan   +5 more
doaj   +1 more source

Study on Time Reversal Maximum Ratio Combining in Underwater Acoustic Communications

Applied Sciences, 2021
Time reversal (TR) can achieve temporal and spatial focusing by exploiting spatial diversity in complex underwater environments with significant multipath. This property makes TR useful for underwater acoustic (UWA) communications.
Anbang Zhao, Caigao Zeng, Juan Hui, Keren Wang, Kaiyu Tang   +4 more
doaj   +1 more source

Asynchronous Multisonar Data Integration Approach Used to Detect Sparse Targets

IEEE Access, 2019
Due to the advantage of the distributed multisensor detection system which makes sonar detect further and more accurate estimation of the target state, distributed multisensor data fusion algorithms are widely applied to the sonar detection system ...
Yang Chen, Xueli Sheng, Longxiang Guo, Pengfei Li, Haoyan Hao, Jingwei Yin   +5 more
doaj   +1 more source

Optimization of the Equivalent Source Configuration for the Equivalent Source Method

Journal of Marine Science and Engineering, 2021
The equivalent source method is widely applied to study structural acoustic radiation in an underwater environment. However, there is still uncertainty in arranging the equivalent source, and the current mainstream configuration method needs a large ...
Lanyue Zhang, Jia Wang, Desen Yang, Bo Hu, Di Wu   +4 more
doaj   +1 more source

Influence of cross-section geometry and wire orientation on the phonon shifts in ultra-scaled Si nanowires [PDF]

, 2011
Engineering of the cross-section shape and size of ultra-scaled Si nanowires (SiNWs) provides an attractive way for tuning their structural properties. The acoustic and optical phonon shifts of the free-standing circular, hexagonal, square and triangular
Klimeck, Gerhard, Luisier, Mathieu, Paul, Abhijeet   +2 more
core   +3 more sources

APE-Sync: An Adaptive Power Efficient Time Synchronization for Mobile Underwater Sensor Networks

IEEE Access, 2019
Time synchronization is a cooperative work's foundation among underwater sensor networks' nodes; it takes a crucial role in the application and the study of underwater sensor networks.
Feng Zhou, Qi Wang, Guangjie Han, Gang Qiao, Zongxin Sun, Ahmed Niaz   +5 more
doaj   +1 more source

Industrial archaeoacoustics, methods and applications in heritage safeguarding. The case of the MNACTEC Territorial System project “The Sounds of Industry”

Treballs d'Arqueologia
Archaeoacoustics, an interdisciplinary field that combines archaeology, acoustics and computer modeling, traditionally researches the sonic dimensions of ancient cultures, revealing insights beyond conventional methods.
Emilio Marx, Ginebra Raventós de Volart, Edgardo Gómez Ortiz   +2 more
doaj   +1 more source