Results 111 to 120 of about 11,277,587 (243)

Active sonar performance modelling for Doppler-sensitive pulses

, 2021
Accurate sonar performance modelling is essential to predict likely detection ranges that can be obtained by employing active anti-submarine warfare sonars. Reverberation forms an important source of interference for active sonar performance, the effects
Prior, M.K., Colin, M., Hartstra, I.E.
core  

DA-YOLOv7: A Deep Learning-Driven High-Performance Underwater Sonar Image Target Recognition Model

Journal of Marine Science and Engineering
Affected by the complex underwater environment and the limitations of low-resolution sonar image data and small sample sizes, traditional image recognition algorithms have difficulties achieving accurate sonar image recognition.
Zhe Chen, Guohao Xie, Xiaofang Deng, Jie Peng, Hongbing Qiu   +4 more
doaj   +1 more source

Advances in the Design and Functionality of a Compact Multi‐Reflecting Time‐of‐Flight Mass Spectrometer

Rapid Communications in Mass Spectrometry, Volume 40, Issue 22, 30 November 2026.
ABSTRACT Rationale High‐resolution mass spectrometry is routinely used for the analysis of complex samples in pharmaceutical, environmental, and omics related studies. Such applications demand instrumentation to be capable of combining sub‐ppm mass accuracy, high resolving power, rapid full m/z range acquisition over a wide dynamic range.
Jason Wildgoose, Samantha Ferries, Lee A. Gethings, Matthew E. Daly, Martin E. Palmer, Richard Lock, Johannes P. C. Vissers, James I. Langridge   +7 more
wiley   +1 more source

Impact of Stabilizing Osmolytes on the Conformational Dynamics of Human and Rat Islet Amyloid Polypeptides

Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 10, Page 1717-1737, October 2026.
ABSTRACT The aggregation of human islet amyloid polypeptide (hIAPP) into cytotoxic oligomers and amyloid fibrils is a hallmark of type 2 diabetes mellitus (T2DM), leading to pancreatic β‐cell dysfunction. In contrast, rat IAPP (rIAPP) is largely non‐amyloidogenic. Osmolytes such as glucose, glycerol, and sorbitol are known to stabilize globular protein
Kiara A. Kidman, Claudio Pedrick, Cara A. Kreck, Ricardo L. Mancera   +3 more
wiley   +1 more source

Kogia Records in Brazilian Equatorial and Southwestern Atlantic Oceans

Marine Mammal Science, Volume 42, Issue 4, October 2026.
ABSTRACT The pygmy (Kogia breviceps) and dwarf (Kogia sima) sperm whales are cryptic cetaceans characterized by inconspicuous surfacing behavior, small group sizes, and deep‐diving habits, making visual detection particularly challenging. Here, we present the first broad‐scale passive acoustic monitoring (PAM) assessment of Kogia spp.
Joao Pedro M. Mura, Raphael B. Machado, Yasmin P. Viana, Natalia Rodrigues‐Soares, Giovanne A. Ferreira, Larissa Kelmer L. Kascher, Barbara S. Silva, Lucia O. Alencar, Gabrieli M. Rodrigues, Franciele R. de Castro, Daniela F. Godoy, Jose L. Pizzorno, Artur Andriolo   +12 more
wiley   +1 more source

Forward-looking Sonar Image Mosaicking by Feature Tracking

, 2016
High-frequency forward-looking sonar are appropriate for the operation or search close to the seabed. Constructing a panoramic mosaic not only facilitates an interpretation of the underwater environment, but also supports the vehicle’s self ...
Li S(李硕), J. Michael Herrmann, Liu KZ(刘开周), Feng XS(封锡盛), Song SM(宋三明)   +4 more
core  

A Multi-Scale Fusion Strategy for Side Scan Sonar Image Correction to Improve Low Contrast and Noise Interference

Remote Sensing
Side scan sonar images have great application prospects in underwater surveys, target detection, and engineering activities. However, the acquired sonar images exhibit low illumination, scattered noise, distorted outlines, and unclear edge textures due ...
Ping Zhou, Jifa Chen, Pu Tang, Jianjun Gan, Hongmei Zhang   +4 more
doaj   +1 more source

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

한국해양공학회지
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

Optimisation of Microwave‐Assisted Extraction and Spray Drying for Chlorophyll Powder Production From Ceratophyllum submersum L.

Food Science &Nutrition, Volume 14, Issue 9, September 2026.
An integrated microwave‐assisted extraction (MAE) and spray‐drying process was developed and optimized by response surface methodology (RSM) to produce a stable chlorophyll powder from the underutilized aquatic macrophyte Ceratophyllum submersum L. The resulting powder combined high pigment retention (67.81% chlorophyll; 63.74% recovery) with favorable
Hoang Thi Ngoc Nhon, Lam Nguyen Dan Khoa, Le Thi Hong Anh   +2 more
wiley   +1 more source

Redefining Optimal Coverage Path Planning for FLS‐Equipped AUVs With Deep Reinforcement Learning

Journal of Field Robotics, Volume 43, Issue 6, Page 3617-3632, September 2026.
ABSTRACT Autonomous Underwater Vehicles (AUVs) have emerged as indispensable tools for a variety of subsea tasks, from habitat monitoring and seabed mapping to infrastructure inspection and mine countermeasures. A fundamental challenge in this field is Coverage Path Planning (CPP), the problem of ensuring complete and efficient area coverage.
Lorenzo Cecchi, Alberto Topini, Alessandro Bucci, Alessandro Ridolfi   +3 more
wiley   +1 more source