Results 21 to 30 of about 1,128 (134)

A Novel Deep Learning Method for Underwater Target Recognition Based on Res-Dense Convolutional Neural Network with Attention Mechanism

Journal of Marine Science and Engineering, 2023
Long-range underwater targets must be accurately and quickly identified for both defense and civil purposes. However, the performance of an underwater acoustic target recognition (UATR) system can be significantly affected by factors such as lack of data
Anqi Jin, Xiangyang Zeng
doaj   +1 more source

An Underwater Acoustic Target Recognition Method Based on Spectrograms with Different Resolutions

Journal of Marine Science and Engineering, 2021
This paper focuses on the automatic target recognition (ATR) method based on ship-radiated noise and proposes an underwater acoustic target recognition (UATR) method based on ResNet.
Xinwei Luo, Minghong Zhang, Ting Liu, Ming Huang, Xiaogang Xu   +4 more
doaj   +1 more source

Entre la movilización y la negociación: FAA y UATRE frente al agronegocio

Avances del Cesor, 2021
La configuración del agronegocio no estuvo exenta de conflictos que estructuraron formas de organización y demandas frente al avance y consolidación del nuevo paradigma productivo. El objetivo del presente artículo es historizar cómo emergió la conflictividad en el mundo rural y de qué manera la misma fue procesada y canalizada por las organizaciones ...
Carini, Gabriel Fernando, Gerbaldo, Juan Carlos   +1 more
openaire   +5 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   +1 more source

Fourier Transform Infrared Spectroscopy (FTIR) and Multivariate Analysis for Identification of Different Vegetable Oils Used in Biodiesel Production

Sensors, 2013
The main objective of this study was to use infrared spectroscopy to identify vegetable oils used as raw material for biodiesel production and apply multivariate analysis to the data.
Rosana de Cássia de Souza Schneider, Adilson Ben da Costa, Luciano Marder, Marco Flôres Ferrão, Daniela Mueller   +4 more
doaj   +1 more source

Cemaran Mikroplastik pada Ikan Pindang dan Potensi Bahayanya terhadap Kesehatan Manusia, Studi Kasus di Bogor

Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan, 2021
Tingginya akumulasi sampah plastik di perairan Indonesia dapat meningkatkan potensi cemaran mikroplastik. Ikan dan garam merupakan bahan baku utama pembuatan ikan pindang yang keduanya berpotensi membawa berbagai bahan cemaran, termasuk mikroplastik ...
Gunawan Gunawan, Hefni Effendi, Endang Warsiki   +2 more
doaj   +1 more source

A Deep Convolutional Neural Network Inspired by Auditory Perception for Underwater Acoustic Target Recognition

Sensors, 2019
Underwater acoustic target recognition (UATR) using ship-radiated noise faces big challenges due to the complex marine environment. In this paper, inspired by neural mechanisms of auditory perception, a new end-to-end deep neural network named auditory ...
Honghui Yang, Junhao Li, Sheng Shen, Guanghui Xu   +3 more
doaj   +1 more source

Development and characterization of sodium polyacrylate/bentonite hydrogel with epoxy resin coating [PDF]

Polímeros, 2023
Composites are relevant to high-performance materials in the aerospace sector and have attracted the attention of the scientific and technological communities. Bentonites present very fine granulometry which enables their use in composites.
Marcia Murakoshi Takematsu, Amanda Faria Baruel, Silvana Navarro Cassu, Milton Faria Diniz, David Alexandro Graves, Rita de Cássia Lazzarini Dutra   +5 more
doaj   +1 more source

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   +1 more source

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   +3 more sources