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18-PULSE AUTOTRANSFORMER RECTIFIER UNIT USING SEPIC CONVERTERS FOR REGULATED DC-BUS AND HIGH FREQUENCY ISOLATION
(Ieee, 2015-01-01)
Multipulse rectifier topologies based on phase-shifting auto-connected transformers are increasingly applied in power electronics devices for power quality improvement. Due their construction, they mitigate many low-harmonic ...
Analysis of the transistor efficiency of Gas Phase Zn Diffusion In0.53Ga0.47As nTFETs at different temperatures
(Ieee, 2017-01-01)
In this work, the influence of the temperature and the different equivalent oxide thickness (EOT) of In0.53Ga0.47As nTFETs fabricated with gas phase Zn diffusion is analyzed. The different devices have in their gates stacks ...
COMBINED UNSUPERVISED AND SEMI-SUPERVISED LEARNING FOR DATA CLASSIFICATION
(Ieee, 2016-01-01)
Semi-supervised learning methods exploit both labeled and unlabeled data items in their training process, requiring only a small subset of labeled items. Although capable of drastically reducing the costs of labeling ...
Unsupervised Similarity Learning through Cartesian Product of Ranking References for Image Retrieval Tasks
(Ieee, 2016-01-01)
Despite the consistent advances in visual features and other Content-Based Image Retrieval techniques, measuring the similarity among images is still a challenging task for effective image retrieval. In this scenario, ...
Motivating Engineering Students to Math Classes: practical experience teaching Ordinary Differential Equations
(Ieee, 2017-01-01)
Teaching mathematics for engineering students is very important. New undergraduate students are aware that they will need mathematical concepts in professional activities. It is still usual to observe not only the difficulty ...
Challenges to integrate software testing into introductory programming courses
(Ieee, 2017-01-01)
Several studies suggest that the teaching of software testing should begin as early as possible, since introductory programming courses. In this way, the teaching of both subjects, programming and testing, becomes an ...
Simulation of a Distributed Generator with Wireless Communication using TrueTime and PLECS
(Ieee, 2015-01-01)
The increasing demand for the use of electricity results in a necessary expansion of the energy matrix through alternative sources, including the participation of small power generators in low or medium voltage. In this ...
A comparative study between recent wavelet nonthresholding methods and the well-established spectral subtractive and statistical-model-based algorithms for speech enhancement under real noisy conditions
(Ieee, 2016-01-01)
In this paper, a comparative study between current wavelet nonthresholding methods for speech enhancement and the well-established spectral subtractive and statistical-modelbased algorithms is performed. The development ...
Increasing the Hosting Capacity for Renewable Energy in Distribution Networks
(Ieee, 2017-01-01)
Environmental concerns and the need to decarbonize the supply side of power systems are spurring the integration of renewable energy sources (RES). Consequently, an unprecedented increase of RES, particularly photovoltaic ...
Ozone sensing properties of nickel phthalocyanine:ZnO nanorod heterostructures
(Ieee, 2016-01-01)
We report on the chemiresistive gas sensing characteristics of ZnO nanorods (NRs) modified by a thin layer of nickel phthalocyanine (NiPc). Ozone detection was carried out through electrical measurements with an optimized ...