Improving Vision Transformers by Revisiting High-Frequency Components
, 2022 The transformer models have shown promising effectiveness in dealing with various vision tasks. However, compared with training Convolutional Neural Network (CNN) models, training Vision Transformer (ViT) models is more difficult and relies on the large-scale training set.
Jiawang Bai +5 more
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High frequency transformation of Bordetella by electroporation [PDF]
FEMS Microbiology Letters, 1988 A simple and efficient system is described for the transformation of Bordetella species with a plasmid of the P incompatibility group. The parameters tested to obtain the highest frequency of transformation were strain, initial field strength, number of pulses and DNA and cell concentration. The most important variable was found to be the initial field
Gavin Zealey +4 more
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Bridging in contaminated transformer oil under DC and AC electric field [PDF]
, 2013 One of the key components in high voltage transmission and distribution systems are power transformers and their consistent operation is of utmost importance to energy utilities and users.
Wilson, G +9 more
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A New Modular Multilevel AC/AC Converter Using HF Transformer
IEEE Access, 2020 This paper proposes a new modular multilevel AC/AC converter using high-frequency (HF) transformer, which has the advantages of modular design, easy expansion, high power density, no circulation current, good output voltage waveform quality and low cost.
Yongqing Meng +6 more
doaj +1 more source
Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil [PDF]
, 2015 Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S. +4 more
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Electric Field Simulations and Analysis for High Voltage High Power Medium Frequency Transformer
Energies, 2017 The electronic power transformer (EPT) raises concerns for its notable size and volume reduction compared with traditional line frequency transformers.
Pei Huang, Chengxiong Mao, Dan Wang
doaj +1 more source
Convolution-Transformer Adaptive Fusion Network for Hyperspectral Image Classification
Applied Sciences, 2022 Hyperspectral image (HSI) classification is an important but challenging topic in the field of remote sensing and earth observation. By coupling the advantages of convolutional neural network (CNN) and Transformer model, the CNN–Transformer hybrid model ...
Jiaju Li +5 more
doaj +1 more source
Modular High-Frequency High-Power Transformers for Offshore Wind Turbines [PDF]
, 2021 Conventional line frequency transformers are commonly used for wind turbines to step up the low-level voltage of the generators to reduce the transmission losses.
Weichong Yao +7 more
core +1 more source
Low and high frequency model of three phase transformer by frequency response analysis measurement
Open Physics, 2018 The behavior analysis of the transformer is usually achieved by the frequency response analysis (FRA), which is obtained by the application of a very low AC voltage in over a wide frequency range.
Chaouche Moustafa Sahnoune +2 more
doaj +1 more source
Frequency Domain Modeling of High Voltage Transformers Using a Nonlinear Least-Square Estimation Technique [PDF]
, 2009 The development of transformer models can be achieved based on experimental frequency response measurements providing access to the windings is available and the physical dimensions are known in order to calculate R, L and C parameter values. Of interest
Mohamed, R, Lewin, P L
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