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Itens para a visualização no momento 251-260 of 304
Efeito de elevadas temperaturas, resfriamento e reidratação nas propriedades de argamassas para assentamento de alvenaria estrutural
(Universidade Federal de Santa Maria, 2023-02-24)
Bedding mortars are important components for predicting the performance of structural
masonry. In fire situations, bedding mortars can be severely damaged. The effects of
high temperature exposure, cooling regimes and ...
Construção e validação de um instrumento para avaliação do perfil inovador de produtos e serviços em pequenas e médias empresas do nordeste brasileiro
(Universidade Federal de Santa Maria, 2023-03-23)
Innovation is a priority in developed countries, whose strategy for growth and competitiveness
is differentiation in research and development of new technologies. To carry out the innovation
process as an organizational ...
Modelo de avaliação de desempenho de operação e manutenção de usinas fotovoltaicas de minigeração distribuída
(Universidade Federal de Santa Maria, 2023-03-27)
With the increasing demand for electrical energy, it is important that power generation plants are managed efficiently and economically. Among the options for generating electricity, one of the fastest growing worldwide ...
Controle adaptativo de corrente aplicado a conversores estáticos conectados à rede elétrica
(Universidade Federal de Santa Maria, 2013-02-28)
This thesis addresses the design of adaptive current controllers applied for voltagesource
grid-connected converters with LCL-filter. Due to the grid equivalent impedance
uncertainty and/or variation at the point of ...
Algoritmo de alto desempenho para proteção numérica de linhas de transmissão imune a oscilações de potência
(Universidade Federal de Santa Maria, 2012-05-04)
This Doctoral Thesis proposes a new methodology for transmission line protection
tolerant to power swings. The algorithm developed has the ability to detect, classify and
locate all fault types with and without power ...
Sistemas eletrônicos para iluminação de exteriores empregando diodos emissores de luz (LEDs) alimentados pela rede elétrica e por baterias
(Universidade Federal de Santa Maria, 2012-11-30)
This work presents a design methodology and analysis of electronic circuits applied to
outdoor lighting systems using light emitting diodes (LEDs). The goal of topologies developed
here is to supply the LEDs from the ...
Gerador de indução com excitação estática, filtro ativo e armazenamento de energia para sistemas eólicos isolados
(Universidade Federal de Santa Maria, 2013-03-01)
The growing global demand for electricity, increasing scarcity of the conventional
energy sources and the need to reduce environmental impacts contributed to the pronounced
development of new technologies based on clean ...
Sistemas eletrônicos de iluminação baseados nos conversores CA/CA
(Universidade Federal de Santa Maria, 2011-08-23)
This thesis proposes to improve the efficiency of public illumination systems by means of AC chopper based power converters. A comparative study of high performance AC/AC converters feeding high pressure sodium lamps on ...
Sistema de eletrocoagulação-flotação: uma unidade de tratamento de água inovadora para demandas eventuais e remotas do saneamento básico
(Universidade Federal de Santa Maria, 2020-04-30)
The need for an innovative, compact, portable and automated technology, originating from the
operating sector of the sanitation companies, to meet the growing demand for water treatment,
this study aimed to develop an ...
Influência de variáveis climáticas no peso de colmeias Apis mellifera por meio de modelos estatísticos
(Universidade Federal de Santa Maria, 2023-03-30)
Increased bee mortality around the world has worried the researchers due to their environmental and economic importance, especially for pollination. New technologies are being developed to reduce this problem, such as the ...