Results 41 to 50 of about 3,577 (170)

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

Fluorine-induced J-aggregation enhances emissive properties of a new NLO push–pull chromophore [PDF]

, 2014
A new fluorinated push–pull chromophore with good second-order NLO properties even in concentrated solution shows solid state intermolecular aryl–fluoroaryl interactions leading to J-aggregates with intense solid state ...
A., Forni, C., Botta, Cavallo, Gabriella, Dichiarante, Valentina, E., Cariati, E., Tordin, Metrangolo, Pierangelo, Pilati, TULLIO MARIA, Resnati, Giuseppe, S., Righetto, Terraneo, Giancarlo   +10 more
core   +2 more sources

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

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

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

Detection of Symmetry Enriched Topological Phases

, 2013
Topologically ordered systems in the presence of symmetries can exhibit new structures which are referred to as symmetry enriched topological (SET) phases.
Chen, Xie, Huang, Ching-Yu, Pollmann, Frank   +2 more
core   +1 more source

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

The Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

Exploration of the Phytochemical and Antidiabetic Properties of Teucrium polium: A Natural Asset for Type 2 Diabetes Management

ChemistryOpen, EarlyView.
Teucrium polium shows antidiabetic activity with its phytochemical composition and biological activities. The essential oil is rich in carvacrol, thymol, γ‐terpinene, and o‐cymene, while the aqueous and hydroethanolic extracts are characterized by poliumoside, verbascoside, isorhamnetin‐3‐O‐rutinoside, and apigenin‐7‐rutinoside. Antioxidant activity is
Hajar El Ouadni, Aziz Drioiche, Fadoua El Makhoukhi, Omkulthom Al kamaly, Hannou Zerkani, Smail Amalich, Imane Tagnaout, Mohamed Radi, Yahya Cherrah, Touriya Zair, Katim Alaoui   +10 more
wiley   +1 more source

Natural products from stem bark of Calophyllum andersonii [PDF]

, 2018
Phytochemical study on the stem bark of Calophyllum andersonii has resulted in the isolation of five xanthones, namely (1) caloxanthone I, (2) pyranojacareubin, (3) macluraxanthone, (4) caloxanthone C, and (5) euxanthone.
Ee, Gwendoline Cheng Lian, Jong, Vivien Yi Mian, Karunakaran, Thiruventhan, Tee, Keng Hong, Teh, Soek Sin, Wong, Ka Woong   +5 more
core  

Isoskeletal Schiff base polynuclear coordination clusters: synthetic and theoretical aspects [PDF]

, 2016
This work addresses and enlightens synthetic aspects derived from our effort to systematically construct isoskeletal tetranuclear coordination clusters (CCs) of the general formula [TR2Ln2(LX)4(NO3)2(solv)2] possessing a specific defected dicubane ...
Abdul-Sada, Alaa, Dokorou, Vassiliki N, Griffiths, Kieran, Kostakis, George E, Spencer, John, Vargas, Alfredo   +5 more
core   +1 more source