Results 21 to 30 of about 3,475,694 (250)

Application of Internet of Things Technology in the Construction of Bored Pile Foundation in a High Altitude Environment

Journal of Control Science and Engineering, 2022
In order to solve the problem that the current geophysical method is difficult to locate in the mud of bored piles, the problem of effective exploration of karst caves at the bottom of piles, the author puts forward the application of Internet of Things ...
Jiayin Liu, Yang Wang, Yingjun Guo, Zhipeng Chen, Daowei Jiao   +4 more
doaj   +1 more source

New Constructions of Extended Sonar Sequences From Sidon Sets

IEEE Access, 2022
A $(m,n)$ sonar sequence is an $m\times n$ array with exactly one dot in each column and where all lines connecting two dots in the array are distinct as vectors.
Luis Miguel Delgado Ordonez, Carlos Andres Martos Ojeda, Carlos A. Trujillo   +2 more
doaj   +1 more source

Design of Morphological Detector Monitoring System on Horizontal Underground Salt Cavern

Taiyuan Ligong Daxue xuebao, 2021
Aiming at the difficulty in the application of traditional sonar technology in the measurement of horizontal salt caverns, a salt cavern shape detection method with image sonar was proposed, and the monitoring system of the detector was designed and ...
Yanzhao HAO, Chunyan Ma
doaj   +1 more source

The use of active sonar to study cetaceans [PDF]

, 2012
Cetacean species face serious challenges worldwide due to the increasing noise pollution brought to their environment by human activities such as seismic exploration. Regulation of these activities is vaguely defined and uncoordinated.
Bernasconi, Matteo
core   +2 more sources

Research on Underwater Collaborative Detection Method Based on Complex Marine Environment

IEEE Access
In modern underwater warfare, detecting and locating enemy submarines is the primary task, but there are still many difficulties in detecting submarines.
Chaofeng Lan, Zelong Yu, Huan Chen, Lei Zhang, Meng Zhang   +4 more
doaj   +1 more source

Underwater Target Detection Based on Sonar Image

水下无人系统学报, 2023
Underwater target detection by processing sonar images is of great military and civil significance. This paper comprehensively describes the principles, methods, algorithms, and development trends in underwater target detection based on sonar images ...
Zixiao HAO, Qi WANG
doaj   +1 more source

Optimizing Strategies for Non‐Invasive Prospection of Settlements in the Intertidal Zone: A Case Study From the Centre of the Drowned Medieval Village of Tolsende (Scheldt Estuary, the Netherlands)

Archaeological Prospection, EarlyView.
ABSTRACT Medieval and early modern drowned villages in the intertidal zone of the Scheldt estuary (the Netherlands) constitute intriguing yet largely understudied components of north‐western Europe's underwater cultural heritage. Despite their high archaeological potential as time capsules of past settlement landscapes, research has remained limited ...
Jan Trachet, Sarah Bäumler, Stefan Krojer, Jeroen Verhegge, Wim De Clercq, Philippe De Smedt, Wouter H. Maes, Bente S. Majchczack, Immo Trinks, Dennis Wilken   +9 more
wiley   +1 more source

Sonar Image Detection Based on Multi-Scale Multi-Column Convolution Neural Networks

IEEE Access, 2019
Automatic detection of underwater objects by sonar images is an important and challenging topic in applications of Autonomous Underwater Vehicle (AUV) under the complex marine environment.
Zhen Wang, Shanwen Zhang
doaj   +1 more source

Scanning Parametric Sediment Echosounder as Tool for Underwater Archaeological Prospection

Archaeological Prospection, EarlyView.
ABSTRACT Underwater cultural heritage 3D prospection techniques, especially for remains that are partly buried in the ground, are only very rarely available and often can only be applied with considerable technical effort. To overcome this limitation, we evaluate a methodological adaption of widely used and available single channel parametric sediment ...
Dennis Wilken, Philipp Held, Jacob Geersen, Marcel Bradtmöller, Peter Feldens, Jens Schneider v. Deimling   +5 more
wiley   +1 more source

A Multi-Feature Early Fusion Network with Domain-Specific Contrastive Representation and Attention Mechanism for Side-Scan Sonar Target Detection

Applied Sciences
Accurate target detection in side-scan sonar imagery is important for marine resource investigation, underwater infrastructure inspection, and maritime security.
Junhui Zhu, Houpu Li, Shaofeng Bian, Xueshen Li, Lei Liu, Guojun Zhai, Ye Peng   +6 more
doaj   +1 more source