Results 31 to 40 of about 1,128 (134)

A Novel Underwater Acoustic Target Recognition Method Based on MFCC and RACNN. [PDF]

Sensors (Basel)
In ocean remote sensing missions, recognizing an underwater acoustic target is a crucial technology for conducting marine biological surveys, ocean explorations, and other scientific activities that take place in water.
Liu D, Yang H, Hou W, Wang B.
europepmc   +2 more sources

Enhancing Underwater Acoustic Target Recognition Through Advanced Feature Fusion and Deep Learning

Journal of Marine Science and Engineering
Underwater Acoustic Target Recognition (UATR) is critical to maritime traffic management and ocean monitoring. However, underwater acoustic analysis is fraught with difficulties.
Yanghong Zhao, Guohao Xie, Haoyu Chen, Mingsong Chen, Li Huang   +4 more
doaj   +1 more source

A Novel Multi-Feature Fusion Model Based on Pre-Trained Wav2vec 2.0 for Underwater Acoustic Target Recognition

Remote Sensing
Although recent data-driven Underwater Acoustic Target Recognition (UATR) methods have played a dominant role in marine acoustics, they suffer from complex ocean environments and rather small datasets. To tackle such challenges, researchers have resorted
Zijun Pu, Qunfei Zhang, Yangtao Xue, Peican Zhu, Xiaodong Cui   +4 more
doaj   +1 more source

Underwater Acoustic Target Recognition with a Residual Network and the Optimized Feature Extraction Method

Applied Sciences, 2021
Underwater Acoustic Target Recognition (UATR) remains one of the most challenging tasks in underwater signal processing due to the lack of labeled data acquisition, the impact of the time-space varying intrinsic characteristics, and the interference from
Feng Hong, Chengwei Liu, Lijuan Guo, Feng Chen, Haihong Feng   +4 more
doaj   +1 more source

Caracterização por FT-IR da superfície de borracha EPDM tratada via plasma por micro-ondas FT-IR characterization of EPDM rubber surface treated by microwave plasma

Polímeros, 2012
A superfície de uma borracha de etileno-propileno-dieno (EPDM) vulcanizada foi modificada via plasma por microondas, com gases Ar, Ar/O2, N2/O2 e N2/H2, tendo como objetivo melhorar as propriedades adesivas da superfície.
Renata P. dos Santos, Mauro S. de O. Junior, Elizabeth da C. Mattos, Milton F. Diniz, Rita de C. L. Dutra   +4 more
doaj   +3 more sources

Activating Paper Applying Gelatin, Starch and Chitosan Coatings Loaded With O/W Emulsions Encapsulating Rutin, Carvacrol and α‐Tocopherol

Packaging Technology and Science, Volume 39, Issue 8, Page 1061-1082, August 2026.
Emulsion type governed the microstructure and functionality of papers coated with biopolymers matrix loaded with hydrophobic bioactives encapsulated into O/W emulsions. Emulsified systems improved UV–Vis barrier and antioxidant activity, whereas gelatin coatings with conventional or Pickering emulsions provided the greatest mechanical reinforcement ...
Kamila de L. Santos, Ana Mônica Quinta Barbosa Bittante, Rodrigo Vinícius Lourenço, Júlio Cesar de Carvalho Balieiro, Paulo José do Amaral Sobral   +4 more
wiley   +1 more source

The Versatile Structural World of Methanedi‐ and Trisulfonic Acid and Their Salts

ChemistryOpen, Volume 15, Issue 7, July 2026.
The solid‐state structures of the CH4‐derived polysulfonic acids methanedisulfonic acid (MDSA) and methanetrisulfonic acid (MTSA) are presented for the first time. Additionally, a broad overview over possible MDS and MTS salts, containing mostly group I cations, is given and their solid‐state structures are analyzed, showing the structural versatility ...
Katrin Eppers, Alisha Mertens, Jan Chrubasik, Mathias S. Wickleder, Jan Langwald   +4 more
wiley   +1 more source

Impact of V2O5 on the Dissolution Behavior of Sodium Aluminoborosilicate‐Based Model Nuclear Waste Glass

International Journal of Applied Glass Science, Volume 17, Issue 3, July 2026.
ABSTRACT Understanding how vanadium oxide (V2O5) influences the dissolution behavior of nuclear waste glasses is essential for optimizing their waste loading and long‐term durability. In this work, a series of sodium aluminoborosilicate‐based model glasses—(100−x) (30Na2O–5Al2O3–15B2O3–50SiO2)—xV2O5, where x = 0, 2.5, and 5 mol.%—were synthesized to ...
Qianhui Qin, Ann Mary Jose, Rajanavaneethakrishna Rajaramakrishna, Wutthikrai Busayaporn, Jakrapong Kaewkhao, Ashutosh Goel   +5 more
wiley   +1 more source

Fast Reduction of Nitroalkenes Into Nitroalkanes Under Continuous‐Flow Chemical Conditions

European Journal of Organic Chemistry, Volume 29, Issue 24, 23 June 2026.
Flow chemical synthesis was employed for the reduction of nitroalkenes to the corresponding nitroalkanes using sodium borohydride as the reducing agent. The reaction proceeds in only 150 s, affording products from good‐to‐excellent yields (61–96%). Herein, we describe an efficient and rapid continuous‐flow reduction of nitroalkenes to nitroalkanes. The
Iqra Munir, Gianmarco Simonelli, Marino Petrini, Alessandro Palmieri   +3 more
wiley   +1 more source

ANÁLISE DA BIOTINA EM AMOSTRAS DE VITAMINAS COMERCIAIS E MANIPULADA UTILIZANDO ESPECTROSCOPIA NO INFRAVERMELHO FTIR-UATR

Revista Univap, 2017
A biotina, também conhecida como vitamina H, é uma vitamina importante aos organismos vivos, necessária no metabolismo das proteínas e dos carboidratos, ela age diretamente na formação da pele. É uma vitamina hidrossolúvel. As principais fontes alimentares de biotina são frutas, nozes, ovos, carnes, leite e levedura.
Silva, Isabel Christina, Cho, Liu Yao, Sakane, Kumiko Koibuchi   +2 more
openaire   +4 more sources