Zobrazeno 1 - 9
of 9
pro vyhledávání: '"P. F. Seixas"'
Publikováno v:
Eletrônica de Potência, Vol 12, Iss 3 (2007)
This paper presents a design methodology for the digital controllers of a three-phase UPS (Uninterruptible Power Supply). Upon a state-feedback control topology, a systematic method for pole placement and determination of controller gains was develop
Externí odkaz:
https://doaj.org/article/7ccf4154e692493e84702a7cd349c0bd
Publikováno v:
Eletrônica de Potência, Vol 12, Iss 2 (2007)
Este trabalho estuda métodos de modulação PWM para conversores de tensão trifásicos de quatrobraços. O objetivo é estabelecer uma análise comparativa entre esses métodos e mostrar as vantagens de usar esse tipo de conversor. Há dois método
Externí odkaz:
https://doaj.org/article/4f58806c99ac421ebc787803d567f486
Autor:
André F. Seixas, Ana P. Quendera, João P. Sousa, Alda F. Q. Silva, Cecília M. Arraiano, José M. Andrade
Publikováno v:
Frontiers in Genetics, Vol 12 (2022)
Bacteria have to cope with oxidative stress caused by distinct Reactive Oxygen Species (ROS), derived not only from normal aerobic metabolism but also from oxidants present in their environments. The major ROS include superoxide O2−, hydrogen perox
Externí odkaz:
https://doaj.org/article/3ed3d27031744decbf37a29f506d2723
Autor:
Ana P. Quendera, André F. Seixas, Ricardo F. dos Santos, Inês Santos, João P. N. Silva, Cecília M. Arraiano, José M. Andrade
Publikováno v:
Frontiers in Molecular Biosciences, Vol 7 (2020)
Small non-coding RNAs (sRNAs) are critical post-transcriptional regulators of gene expression. Distinct RNA-binding proteins (RBPs) influence the processing, stability and activity of bacterial small RNAs. The vast majority of bacterial sRNAs interac
Externí odkaz:
https://doaj.org/article/ad28ba57ed9544a38ab5b789a811dcbb
Publikováno v:
Chemical Engineering Transactions, Vol 57 (2017)
The aim of this work was to prepare activated carbon (AC) from sugarcane bagasse by the physical activation process (CO2) and subsequently evaluate the physicochemical characteristics of the AC and of the bio oil produced. In a physical activation pr
Externí odkaz:
https://doaj.org/article/8b509b90c12f404bb5b8b34c1b087f81
Publikováno v:
Brazilian Journal of Medical and Biological Research, Vol 46, Iss 6, Pp 486-501 (2013)
The application of nanotechnology to medicine can provide important benefits, especially in oncology, a fact that has resulted in the emergence of a new field called Nanooncology. Nanoparticles can be engineered to incorporate a wide variety of chemo
Externí odkaz:
https://doaj.org/article/d6ed36a26637447ca2f472545702d9a4
Akademický článek
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Autor:
F. F. Rocha, P. F. Seixas, Bernardo Cougo, G. G. B. Coelho, L. de V. B. Machado Neto, P. C. Cortizo
Publikováno v:
2007 IEEE International Symposium on Industrial Electronics.
This paper presents the development of a photo-voltaic voltaic system used to feed a remote fault detector for 11.4kV and 22kV lines. The photovoltaic module also charges two 18Ah Lead-Acid batteries which maintain the circuit on at night. A Buck con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98f009696ccdb7fc098680fd49a13a8f
https://doi.org/10.1109/isie.2007.4374982
https://doi.org/10.1109/isie.2007.4374982
Publikováno v:
Eletrônica de Potência, Vol 12, Iss 3 (2007)
Este trabalho apresenta uma nova abordagem da modulação em largura de pulsos para um conversor estático ca-ca a três braços, utilizado em sistemas de energia ininterrupta (SEI), monofásico, on-line. Três modos de operação são apresentados:
Externí odkaz:
https://doaj.org/article/895c7d8e1e4a440bb737b3ba921e1ec4