Buscar
Mostrando ítems 101-110 de 2728
Self-adjoint operators on inner product spaces over fields of power series
(WALTER DE GRUYTER GMBH, 2008)
Theorems on orthogonal decompositions are a cornerstone in the classical theory of real (or complex) matrices and operators on R-n. In the paper we consider finite dimensional inner product spaces (E,Phi) over a field K = ...
Estabilizador de sistema de potência para máquinas síncronas de polos salientes utilizando a transformada Wavelet
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Engenharia ElétricaAutomação e Sistemas; Engenharia de Computação; Telecomunicações, 2013-07-05)
The power system stabilizers are used to suppress low-frequency electromechanical
oscillations and improve the synchronous generator stability limits. This master thesis
proposes a wavelet-based power system stabilizer, ...
A Magnus Wind Turbine Power Model Based on Direct Solutions Using the Blade Element Momentum Theory and Symbolic Regression
(IEEE, 2017-01)
A model of the power coefficient of a mid-scale Magnus wind turbine using numerical solutions of the Blade Element Momentum Theory and symbolic regression is presented. A direct method is proposed for solving the nonlinear ...
Power dissipation of a viscoelastic rolling wheel in finite deformations
(Pergamon-Elsevier Science Ltd, 2018-04)
A theoretical and numerical framework to evaluate rolling contact using a Lagrangian formulation in the sense of continuum mechanics is established. The treatment corresponds to a non-stationary and large deformation model ...
Comparison of oxygen mass transfer coefficient in simple and extractive fermentation systems
(ELSEVIER SCIENCE SA, 2009)
Aeration and agitation are important variables to ensure effective oxygen transfer rate during aerobic bioprocesses: therefore, the knowledge of the volumetric mass transfer coefficient (k(L)a) is required. In view of ...
Network reconfiguration and loss allocation in a deregulated environment of distribution systems
(2005-12-14)
Low flexibility and reliability in the operation of radial distribution networks make those systems be constructed with extra equipment as sectionalising switches in order to reconfigure the network, so the operation quality ...
Friction losses in valves and fittings for liquid food products
(Inst Chemical Engineers, 2014)