Results 111 to 120 of about 632,387 (252)

Effectiveness Assessment of Underwater Area Cruise Based on the ADC Method

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater area surveillance plays a crucial role in upholding national security, safeguarding strategic interests, and mitigating potential threats. Despite its significance, a notable gap persists in the availability of comprehensive models for assessing its effectiveness.
Qingwei Liang, Yuxin Lin, Mingyang Luo, Zhanghong Zeng   +3 more
wiley   +1 more source

A Fast Algorithm for Approximating High-Frequency Scattering Acoustic Field of Complex Multi-Target Based on the Planar Element Method

水下无人系统学报
With the development of unmanned undersea vehicle(UUV) swarm operations, the detection and recognition of multiple complex underwater targets have attracted significant attention.
Lining MENG, Jingshu ZHAO, Zhenhui LI, Rui LIU   +3 more
doaj   +1 more source

Advanced signal processing techniques for underwater acoustic transmission using steerable transducer arrays [PDF]

The main objective of this research is to design and implement an eight-hydrophone transmitter array for generating bipolar acoustic pulses mimicking those produced by cosmogenic neutrino interaction in sea water.
Ooppakaew, Wichian
core  

FLSea: Underwater Visual–Inertial and Stereovision Forward‐Looking Data Sets

Journal of Field Robotics, EarlyView.
ABSTRACT Visibility underwater is challenging and degrades as the distance between the subject and the camera increases. That is why forward‐looking underwater computer vision tasks are difficult. We have collected underwater forward‐looking stereovision and visual–inertial image sets using two underwater imaging platforms, a stereo camera rig, and an ...
Yelena Randall, Ori Lifschitz, Tali Treibitz   +2 more
wiley   +1 more source

Three-Dimensional Non-Uniform Sampled Data Visualization from Multibeam Echosounder Systems for Underwater Imaging and Environmental Monitoring

Remote Sensing
This paper proposes a method for visualizing three-dimensional non-uniformly sampled data from multibeam echosounder systems (MBESs), aimed at addressing the requirements of monitoring complex and dynamic underwater flow fields.
Wenjing Cao, Shiliang Fang, Chuanqi Zhu, Miao Feng, Yifan Zhou, Hongli Cao   +5 more
doaj   +1 more source

Underwater Ultrasonic Sensor를 이용한 적조 생물의 음향체적산란강도 측정

, 2008
Harmful algae (or called red tide) seriously damages to coastal fisheries activities in Korea, especially aquaculture. Currently, high density red tide (blooming) is detected from optical counting of water sample or visual monitoring.
이형빈, 강돈혁, 나정열, 김은혜, 최지웅, 윤양호   +5 more
core  

Formation Control With Obstacle Avoidance of Underwater Swarms Based on Relative Visual Feedback

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater multi‐robot and swarm systems require advanced methodologies for controlling collective behavior. Conventional single‐robot techniques, such as tethering, sonar imaging, and acoustic localization, are not scalable or effective for swarm applications.
Andrea Infanti, Saverio Iacoponi, Saif Alameri, Mohamed El Hanbaly, Mohammed Tarnini, Cesare Stefanini, Giulia De Masi, Federico Renda   +7 more
wiley   +1 more source

Internal sound field reconstruction method based on optimal arrangement of sound monitoring points near the cabin inner surface

AIP Advances
Aiming at the problem of sound field online monitoring and reconstruction inside the cabin, an inner acoustic field reconstruction method based on the optimal arrangement of sound monitoring points near the surface in the cabin is proposed.
Shengguo Shi, Qiang Guo, Huihui He, Xinyu Wang   +3 more
doaj   +1 more source

Remotely powered underwater acoustic sensor node [11].

, 2019
Remotely powered underwater acoustic sensor node [11].
Mohd Amiruddin Abd Rahman (6990044), Mushtaq Khan (6909230), Mukhtaj Khan (6990038), Sheeraz Ahmed (6990041), Adil Khan (6195395)   +4 more
core   +1 more source

Dumpsite Seabed Characterization of the San Pedro Basin, CA, From Autonomous Vehicle Observations

Journal of Field Robotics, EarlyView.
ABSTRACT A wide‐area seabed survey was conducted using autonomous underwater vehicles (AUVs) in a known dumpsite off the coast of Southern California that has been found to have widespread sediment contamination from the chemical dichlorodiphenyltrichloroethane (DDT).
Ryan A. McCarthy, Dylan Kriegman, Sophia T. Merrifield, Heidi Batchelor, Eric J. Terrill   +4 more
wiley   +1 more source