Results 21 to 30 of about 281,745 (348)

Relationship and Interconversion Between Superhydrophilicity, Underwater Superoleophilicity, Underwater Superaerophilicity, Superhydrophobicity, Underwater Superoleophobicity, and Underwater Superaerophobicity: A Mini-Review [PDF]

open access: yesFrontiers in Chemistry, 2020
Superwetting surfaces have received increasing attention because of their rich practical applications. Although various superwettabilities are independently achieved, the relationship between those superwettabilities is still not well-clarified.
Xun Hou   +3 more
openaire   +4 more sources

An Improved Azimuth Angle Estimation Method with a Single Acoustic Vector Sensor Based on an Active Sonar Detection System

open access: yesSensors, 2017
In this paper, an improved azimuth angle estimation method with a single acoustic vector sensor (AVS) is proposed based on matched filtering theory. The proposed method is mainly applied in an active sonar detection system.
Anbang Zhao, Lin Ma, Xuefei Ma, Juan Hui
doaj   +1 more source

Role of Restored Underwater Images in Underwater Imaging Applications [PDF]

open access: yesApplied System Innovation, 2021
Underwater images are extremely sensitive to distortion occurring in an aquatic underwater environment, with absorption, scattering, polarization, diffraction and low natural light penetration representing common problems caused by sea water. Because of these degradation of quality, effectiveness of the acquired images for underwater applications may ...
Jarina Raihan A   +2 more
openaire   +3 more sources

A Review of Detection Technologies for Underwater Cracks on Concrete Dam Surfaces

open access: yesApplied Sciences, 2023
Cracks seriously endanger the safe and stable operation of dams. It is important to detect surface cracks in a timely and accurate manner to ensure the safety and serviceability of a dam. The above-water crack detection technology of dams has been widely
Dong Chen, Ben Huang, F. Kang
semanticscholar   +1 more source

UMGAN: Underwater Image Enhancement Network for Unpaired Image-to-Image Translation

open access: yesJournal of Marine Science and Engineering, 2023
Due to light absorption and scattering underwater images suffer from low contrast, color distortion, blurred details, and uneven illumination, which affect underwater vision tasks and research.
Bo Sun, Yupeng Mei, Ni Yan, Yingyi Chen
semanticscholar   +1 more source

Underwater Ranker: Learn Which Is Better and How to Be Better [PDF]

open access: yesAAAI Conference on Artificial Intelligence, 2022
In this paper, we present a ranking-based underwater image quality assessment (UIQA) method, abbreviated as URanker. The URanker is built on the efficient conv-attentional image Transformer.
Chunle Guo   +6 more
semanticscholar   +1 more source

A Conformal Driving Class IV Flextensional Transducer

open access: yesSensors, 2018
Class IV Flextensional Transducers (FTs) are the most popular among various FTs used as low-frequency and high power underwater acoustic sources. However, an undeniable fact exists in Class IV FTs is that the resonance frequency of breathing mode ...
Tianfang Zhou   +5 more
doaj   +1 more source

SGUIE-Net: Semantic Attention Guided Underwater Image Enhancement With Multi-Scale Perception [PDF]

open access: yesIEEE Transactions on Image Processing, 2022
Due to the wavelength-dependent light attenuation, refraction and scattering, underwater images usually suffer from color distortion and blurred details. However, due to the limited number of paired underwater images with undistorted images as reference,
Qi Qi   +5 more
semanticscholar   +1 more source

Simulated Research on Passive Sonar Range Using Different Hydrographic Conditions

open access: yesMATEC Web of Conferences, 2015
As an example using the passive sonar, it calculated the quality factor of passive sonar using the sonar equation. The sound field was calculated under different depth and range using multiform hydrographic conditions.
Han Jing   +3 more
doaj   +1 more source

An Improved Aerial Target Localization Method with a Single Vector Sensor

open access: yesSensors, 2017
This paper focuses on the problems encountered in the actual data processing with the use of the existing aerial target localization methods, analyzes the causes of the problems, and proposes an improved algorithm.
Anbang Zhao   +4 more
doaj   +1 more source

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