Buscar
Mostrando ítems 61-70 de 491
Meiotic Chromosome Behavior and Capsule Setting in Doritaenopsis Hybrids
(J. AMER. SOC. HORT. SCI. 133(1):107–116. 2008, 2008-10-06)
The development of new cultivars in Doritaenopsis Guillaum. & Lami orchids is often hindered by factors such as low seed count in hybrids. Cytological study may offer the ability to develop new hybrids by revealing cultivars ...
Estudo e aplicação de conversor multinível híbrido com uma única fonte CC
(Universidade Federal de Santa MariaBREngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia Elétrica, 2013-03-07)
This study proposes a modulation strategy based on geometric approach for a hybrid multilevel converter with single dc voltage source. This multilevel converter is composed of a three-phase three-level multilevel converter ...
Programmable PFC based hybrid multipulse power rectifier for ultra clean power application
(Institute of Electrical and Electronics Engineers (IEEE), 2006-07-01)
A novel hybrid three-phase rectifier is proposed. It is capable to achieve high input power factor (PF) and low total harmonic input currents distortion (THDI). The proposed hybrid high power rectifier is composed by a ...
Programmable PFC based hybrid multipulse power rectifier for ultra clean power application
(Institute of Electrical and Electronics Engineers (IEEE), 2006-07-01)
A novel hybrid three-phase rectifier is proposed. It is capable to achieve high input power factor (PF) and low total harmonic input currents distortion (THDI). The proposed hybrid high power rectifier is composed by a ...
Conversores híbridos aplicados a audio: estudo comparativo com amplificadores classe D
(Universidade Federal de Santa MariaBrasilEngenharia ElétricaUFSMPrograma de Pós-Graduação em Engenharia ElétricaCentro de Tecnologia, 2019-09-13)
The convergence of knowledge related to mechanics, electronics and music has resulted in the development of a series of audio devices. Initially, signal amplifiers were developed working in linear region. Due to the ...
Building a bridge between performance management, radical innovation, and innovation networks: A systematic literature review
(2019-12-01)
Research on performance management (PM) of networks and radical innovation has largely developed along two isolated paths. On the one hand, a growing body of knowledge addresses the use of performance management systems ...
Accelerated ultraviolet aging of structural and luminescent properties of the ureasil-polyether hybrid materials U-PEO:Eu3+ and U-PPO:Eu3+
(2019-08-26)
In this paper, we evaluate the role played by the polyether type and chain length on the complexation of Eu3+ by the urea group of siloxane-polyether organic-inorganic hybrid materials based on polyethylene oxide (U-PEO, ...
Polypropylene blends and composite: Processing-morphology-performance relationship of injected pieces
(IntechOpen, 2020)
Polypropylene (PP) is a low-cost plastic commodity, which currently is in a transition zone between massive use and engineering applications due mainly to its limited mechanical properties, such as low tensile and impact ...
Coordenação local do Eu(III) em híbridos orgânicos/inorgânicos emissores de luz branca
(Sociedade Brasileira de Química, 2001-08-01)
Eu3+ luminescence and EXAFS (Extended X-ray Absorption Fine Structure) results are presented for organic-inorganic hybrid gel hosts composed of a siliceous network to which small chains of oxyethylene units are covalently ...
Coordenaçāo local do Eu(III) em híbridos orgânicos/inorgânicos emissores de luz branca
(2001-07-01)
Eu3+ luminescence and EXAFS (Extended X-ray Absorption Fine Structure) results are presented for organic-inorganic hybrid gel hosts composed of a siliceous network to which small chains of oxyethylene units are covalently ...