Results 21 to 30 of about 326 (101)

Off-Line TLC-IR (UATR) Characterization of Additives in EPDM Rubber

Polymer Testing, 2019
Abstract Sulfur donor accelerators and vulcanization agents, such as peroxides, due to their chemical characteristics and good thermal stability properties in rubber formulations, are essential to provide solutions in different sectors, such as aerospace and automotive, since they reduce the polymer degradation process (reversal), which can influence
Rita de Cássia Lazzarini Dutra, Milton F Diniz, Lidia Mattos Silva Murakami   +2 more
exaly   +2 more sources

Design of Siamese Network for Underwater Target Recognition with Small Sample Size

Applied Sciences, 2022
The acquisition of target data for underwater acoustic target recognition (UATR) is difficult and costly. Although deep neural networks (DNN) have been used in UATR, and some achievements have been made, the performance is not satisfactory when ...
Dali Liu, Wenhao Shen, Wenjing Cao, Weimin Hou, Baozhu Wang   +4 more
doaj   +2 more sources

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   +2 more sources

Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications

Journal of Aerospace Technology and Management, 2019
When some materials need to be characterized, the hydroxyl number (IOH) determination is especially useful, mainly for those applied in the aerospace field.
Laís Lopes Jesus, Lídia Mattos Silva Murakami, Talita de Souza Dias Mello, Milton Faria Diniz, Leandro Mattos Silva, Elizabeth da Costa Mattos, Rita de Cássia Lazzarini Dutra   +6 more
doaj   +5 more sources

Avaliação da aplicabilidade de técnicas FT-IR de reflexão (UATR) e de transmissão para a determinação do teor de acrilonitrila (AN) em NBR Evaluation of FT-IR (UATR and transmission) techniques for determination of AN content in NBR samples

Polímeros, 2008
Amostras vulcanizadas de copolímero de butadieno e acrilonitrila (NBR), contendo teor conhecido de acrilonitrila (AN), foram preparadas nos laboratórios do IAE como amostras de referência para a elaboração de curvas analíticas (ou de calibração), visando
Natália B. Sanches, Milton F. Diniz, Luis C. Alves, Jorge C. N. Dutra, Silvana N. Cassu, Margarete F. P. Azevedo, Rita C. L. Dutra   +6 more
doaj   +2 more sources

Efficient One-Dimensional Network Design Method for Underwater Acoustic Target Recognition

Journal of Marine Science and Engineering
Many studies have used various time-frequency feature extraction methods to convert ship-radiated noise into three-dimensional (3D) data suitable for computer vision (CV) models, which have shown good results in public datasets.
Qing Huang, Xiaoyan Zhang, Anqi Jin, Menghui Lei, Mingmin Zeng, Peilin Cao, Zihan Na, Xiangyang Zeng   +7 more
doaj   +2 more sources

Risperidone/Randomly Methylated β-Cyclodextrin Inclusion Complex—Compatibility Study with Pharmaceutical Excipients

Molecules, 2021
Risperidone (RSP) is an atypical antipsychotic drug used in treating schizophrenia, behavioral, and psychological symptoms of dementia and irritability associated with autism.
Laura Sbârcea, Ionuț-Mihai Tănase, Adriana Ledeți, Denisa Cîrcioban, Gabriela Vlase, Paul Barvinschi, Marinela Miclău, Renata-Maria Văruţ, Oana Suciu, Ionuț Ledeți   +9 more
doaj   +2 more sources

Navigating the Depths: A Comprehensive Survey of Deep Learning for Passive Underwater Acoustic Target Recognition

IEEE Access
The field of deep learning is a rapidly developing research area with numerous applications across multiple domains. Sonar (SOund Navigation And Ranging) processing has traditionally been a field of statistical analysis.
Nils Muller, Jens Reermann, Tobias Meisen   +2 more
doaj   +2 more sources

Stability and Compatibility Studies of Levothyroxine Sodium in Solid Binary Systems—Instrumental Screening

Pharmaceutics, 2020
The influence of excipients on the stability of sodium levothyroxine pentahydrate (LTSS) under ambient conditions and thermal stress was evaluated.
Ionuț Ledeți, Mirabela Romanescu, Denisa Cîrcioban, Adriana Ledeți, Gabriela Vlase, Titus Vlase, Oana Suciu, Marius Murariu, Sorin Olariu, Petru Matusz, Valentina Buda, Doina Piciu   +11 more
doaj   +2 more sources

Avaliação da aplicabilidade de técnicas FT-IR de reflexão (UATR) e de transmissão para a determinação do teor de acrilonitrila (AN) em NBR [PDF]

Polimeros, 2008
Amostras vulcanizadas de copolímero de butadieno e acrilonitrila (NBR), contendo teor conhecido de acrilonitrila (AN), foram preparadas nos laboratórios do IAE como amostras de referência para a elaboração de curvas analíticas (ou de calibração), visando à determinação do teor de AN em NBR, por meio de técnicas FT-IR de reflexão (UATR) de última ...
Silvana Navarro Cassu, Milton F Diniz, Rita C L Dutra   +2 more
exaly   +4 more sources