Ara es mostren els items 1733-1752 de 91829

  • A device for improving the immunity of AC contactor during voltage dips 

    Andrada Gascón, Pedro; Perat Benavides, Josep Ignasi; Navarro, Gustavo (2008-03)
    Article
    Accés obert
    This paper describes an electronic device that enables AC contactors to ride through power quality dsturbances. The proposed device is connected to the contactor coil and consists of a power conversion excitation and hold-in ...
  • A Dichotomy theorem for learning quantified Boolean formulas 

    Dalmau Lloret, Víctor (1997-03)
    Report de recerca
    Accés obert
    We consider the following classes of quantified boolean formulas. Fix a finite set of basic boolean functions. Take conjunctions of these basic functions applied to variables and constants in arbitrary way. Finally ...
  • A Different View of Mies Van Der Rohe's work 

    Casas Cambra, Llogari (Universitat Politècnica de Catalunya, 2014-06)
    Treball Final de Grau
    Accés obert
    This project is intended to convey the beauty of the architecture made by Mies, taking into account the sunlight and the spaces that made his work recognized worldwide. Apart from this, I also want to convey the light ...
  • A differential approach for bounding the index of graphs under perturbations 

    Dalfó Simó, Cristina; Fiol Mora, Miquel Àngel; Garriga Valle, Ernest (2011-03)
    Report de recerca
    Accés obert
  • A differential approach for bounding the index of graphs under perturbations 

    Dalfó Simó, Cristina; Fiol Mora, Miquel Àngel; Garriga Valle, Ernest (2011-09-02)
    Article
    Accés obert
    This paper presents bounds for the variation of the spectral radius (G) of a graph G after some perturbations or local vertex/edge modifications of G. The perturbations considered here are the connection of a new vertex ...
  • A differential game approach to urban drainage systems control 

    Ramírez Jaime, Andrés Felipe; Quijano Silva, Nicanor; Ocampo-Martínez, Carlos (2016)
    Text en actes de congrés
    Accés obert
    Urban drainage systems (UDSs) are complex large-scale systems that carry stormwater and wastewater throughout urban areas. During heavy rain scenarios, UDSs are not able to handle the amount of extra water that enters the ...
  • A Diffserv transport network to bring 3G access to villages in the Amazon forest 

    Simó-Reigadas, Javier (GDEE, 2015)
    Capítol de llibre
    Accés obert
  • A diffusion-based distributed EM algorithm for density estimation in wireless sensor networks 

    Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
  • A diffusion-based em algorithm for distributed estimation in unreliable sensor networks 

    Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (2013-01)
    Article
    Accés restringit per política de l'editorial
    We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
  • A difícil inserção territorial das linhas elétricas de alta tensão: ferrovias, eletricidade e sistema de cidades no corredor fluvial do Noguera Pallaresa (Lleida) 

    Álvarez Palau, Eduard; Gangolells Alseda, Berenguer; Hernández, Mireia (2013)
    Comunicació de congrés
    Accés obert
    O processo de eletrificação do território catalão supôs ao igual que em muitas outras regiões, um salto quantitativo nas expectativas de progresso e desenvolvimento. O processo de industrialização e de aproveitamento de ...
  • A digital image processing method for urban scenes brightness assessment 

    López Besora, Judit; Isalgue Buxeda, Antonio; Coch Roura, Helena (Centre de Política del Sòl i Valoracions - Universitat Politècnica de Catalunya, 2016-10)
    Article
    Accés obert
    The appearance of the city is strongly linked to many aspects such as climate, culture and sociological background. In cities with a prevalence of clear skies, one of the determining aspects is the climatic condition, which ...
  • A digital memristor emulator for FPGA-based artificial neural networks 

    Vourkas, Ioanis; Abusleme, A.; Ntinas, V.; Sirakoulis, Georgios Ch.; Rubio Sola, Jose Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    FPGAs are reconfigurable electronic platforms, well-suited to implement complex artificial neural networks (ANNs). To this end, the compact hardware (HW) implementation of artificial synapses is an important step to obtain ...
  • A diminuiçào da precipitaçào em épocas do año como indício de mudança climática: casos estudiados em Portugal continental 

    Portela, Maria Manuela; Carvalho Quintela, Antonio de (Fundación para el Fomento de la Ingeniería del Agua, 2001-03)
    Article
    Accés obert
    Como manifestação da mudança climática que se julga estar a ocorrer no território português, têm sido referidas a maior irregularidade da distribuição da precipitação ao longo do ano e a sua apreciable diminuição em algumas ...
  • A direct approximation technique for designing digital equalizers with simultaneous specification of magnitude and phase 

    Mariño Acebal, José Bernardo; Figueiras Vidal, Aníbal R. (Georgi, 1978)
    Text en actes de congrés
    Accés obert
    A new direct method for designing nonrecursive and recursive digital equalizers approximating specified attenuation and phase responses is introduced . This method allows to control both magnitude and phase characteristics ...
  • A direct elimination algorithm for quasi-static and dynamic contact problems 

    Capua, Daniel di; Agelet de Saracibar Bosch, Carlos (2015-01-01)
    Article
    Accés obert
    This paper deals with the computational modeling and numerical simulation of contact problems at Unite deformations using the Finite element method. Quasi-static and dynamic problems are considered and two particular ...
  • A direct performance based seismic design method for irregular structures 

    Montoya Coronado, Luis Alberto; Bairán García, Jesús Miguel (2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The problem of designing structures to achieve a specified performance limit state has gain interest in seismic design practice. Currently, some methodologies have been proposed in order to take into account for inelastic ...
  • A direct-sequence spread-spectrum super-regenerative receiver 

    Moncunill Geniz, Francesc Xavier; Mas Casals, Orestes Miquel; Palà Schönwälder, Pere (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Comunicació de congrés
    Accés obert
    Current applications of the super-regenerative receiver use narrowband modulations. In this paper a new architecture that allows incoherent detection of spread-spectrum signals is presented. A pseudorandom code generator ...
  • A discontinuous galerkin formulation for solid dynamics 

    Peraire Guitart, Jaume; Bonet Carbonell, Javier; Huerta, Antonio; Persson, Per Olof; Vidal Seguí, Yolanda (Omnipress, 2006)
    Presentació
    Accés obert
  • A discrete bernoulli free boundary problem 

    González Nogueras, María del Mar; Gualdani, Maria; Shagholian, Henrick (2012-04)
    Report de recerca
    Accés obert
    We consider a free boundary problem for the p-Laplace operator which is related to the so-called Bernoulli free boundary problem. In this formulation, the classical boundary gradient condition is replaced by a condition ...
  • A discrete bit loading algorithm for FBMC/OQAM 

    Caus López, Marius; Pérez Neira, Ana Isabel; García Armada, Ana (2012-06)
    Article
    Accés restringit per política de l'editorial
    In this letter the discrete rate maximization problem is investigated for FBMC/OQAM. The analysis reveals that if there is crosstalk certain bit allocations violate the power constraints. Aiming at ensuring the feasibility ...