Results 81 to 90 of about 1,913,452 (223)

Joint Motion Error Estimation Algorithm for Multibeam Synthetic Aperture Sonar

open access: yesIEEE Access, 2018
Multibeam echo sounder (MBES) and synthetic aperture sonar (SAS) are effective image sonar systems used as the major underwater observation instruments. The MBES system can get the fullscan detection without gaps, while the resolution on the along-track ...
Bo Wei, Haisen Li, Tian Zhou, Chao Xu
doaj   +1 more source

Topology‐based Visual Analysis of Hydrothermal Plumes

open access: yesComputer Graphics Forum, EarlyView.
Abstract Hydrothermal plumes are turbulent structures of intense heat and mineral smoke that rise and disperse into the deep ocean. Existing models generally characterize these systems as a single axisymmetric plume originating from a point source. However, this assumption breaks down in weakly venting, spatially distributed systems, where low‐flux ...
Adhitya Kamakshidasan   +3 more
wiley   +1 more source

Real-Time Underwater Target Classification Method for Multi-resolution imaging Sonar of the AUV

open access: yes, 2015
How to accurately and fast classification obstacle is the key of real-time obstacle avoidance and avoidance decision for autonomous underwater vehicle.
Zhang Y(张瑶)   +2 more
core  

Robust Underwater Object Detection and Relative Navigation Using Simulation-Aided Sonar Image Translation

open access: yes한국해양공학회지
Robust underwater object detection and relative navigation remain challenging because of the severe degradation of sonar imagery caused by acoustic noise and artifacts.
Eunsu Kim, Seonghun Hong, Sukmin Yoon
doaj   +1 more source

A Design Method of Image Sonar

open access: yesJournal of Physics: Conference Series, 2020
Abstract By analyzing the underwater high-speed target tracking and positioning, image sonar was determined as the solution. An image sonar system is constructed. According to the functions of each part of the image sonar, the transducer array, receiver, transmitter and image generation signal processing software are designed.
openaire   +1 more source

Multitrophic responses to tidal marsh restoration: early effects of channel configuration on water quality, aquatic food web structure, and fish communities

open access: yesRestoration Ecology, EarlyView.
Abstract Introduction Tidal wetland restoration is critical for reversing habitat loss and enhancing resilience under sea‐level rise and climate variability. Dutch Slough in the San Francisco Estuary served as a living laboratory for adaptive management.
Joseph E. Merz   +5 more
wiley   +1 more source

Early results and lessons learned from biomanipulation and chemical restoration of a eutrophic shallow lake

open access: yesRestoration Ecology, EarlyView.
Abstract Introduction Over 44% of European lakes fail to meet ecological quality standards, prompting substantial investment in lake restoration to achieve good ecological status. Unfortunately, effects are often short‐lived due to persistent internal phosphorus (P) loading and strong cyprinid‐driven bottom‐up control, which limits water quality ...
Emma Polauke   +3 more
wiley   +1 more source

Echoes of Intelligence: What AI Could Learn From Bats

open access: yesApplied AI Letters, Volume 8, Issue 1, February 2027.
Bat biosonar offers a promising model for embodied AI: navigating dense vegetation through active perception and learning from sparse echoes suggests robust, parsimonious, autonomous alternatives to conventional vision‐centered, data‐intensive systems.
Rolf Müller
wiley   +1 more source

Efficient digital signal processing algorithm for sonar imaging

open access: yes, 1996
An algorithm is presented which can be efficiently applied to a variety of sonar imaging modes including forward looking, side-looking and synthetic aperture sonar.
McHugh, R.   +5 more
core   +1 more source

Towards fast high resolution sonar imaging using high bandwidth transducers and frequency domain compounding

open access: yes, 2022
Art. 5278106In this work, we present a concept and the theoretical evaluation of a high resolution 3D imaging sonar system based on high bandwidth transducers and frequency compound ...
Lemor, R.M.   +4 more
core   +1 more source

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