Now showing items 1-20 of 22

  • Absolute-type shaft encoding using LFSR sequences with a prescribed length 

    Fuertes Armengol, José Mª; Balle Pigem, Borja de; Ventura Capell, Enric (2008-03-31)
    Article
    Open Access
    Maximal-length binary sequences have existed for a long time. They have many interesting properties, and one of them is that, when taken in blocks of n consecutive positions, they form 2n - 1 different codes in a closed ...
  • Absolute type shaft encoding using LFSR sequences with prescribed length 

    Fuertes Armengol, José Mª; Balle, Borja; Ventura Capell, Enric (2006-02)
    Article
    Open Access
    Maximal-length binary sequences have been known for a long time. They have many interesting properties, one of them is that when taken in blocks of n consecutive positions they form 2 n ° 1 diÆerent codes in a ...
  • Association between time to reperfusion and outcome is primarily driven by the time from imaging to reperfusion 

    Ribó, Marc; Molina, Carlos A.; Cobo Valeri, Erik; Cerda, Neus; Tomasello, Alejandro; Urra, Xabier; Sanroman, Luis; Dávalos Errando, Antoni; Jovin, Tudor G. (2016-04-01)
    Article
    Open Access
    Background and Purpose A progressive decline in the odds of favorable outcome as time to reperfusion increases is well known. However, the impact of specific workflow intervals is not clear.; Methods We studied the mechanical ...
  • A stochastic version of the strategy-based congested transit assignment model and a technique by smoothing approximations 

    Codina Sancho, Esteve; Rosell Camps, Francisca (Springer, 2018)
    Article
    Restricted access - publisher's policy
    This paper develops a stochastic version for the strategybased congested transit assignment problem stated by Cominetti and Correa (Trans. Sci. 35(3):250-267, 2001). As a distinctive approach, this stochastic version takes ...
  • Bayesian Optimization in Machine Learning 

    Jiménez Luna, José (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2017-06)
    Master thesis
    Open Access
    Bayesian optimization has risen over the last few years as a very attractive approach to find the optimum of noisy, expensive to evaluate, and possibly black-box functions. One of the fields where these functions are common ...
  • Comparación de la estimación de la volatilidad de una serie financiera, a través de la metodología del filtro de Kalman y el filtro de partículas en el contexto de los modelos de espacio-estado 

    Quispe Anastacio, Erick Mauricio (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2018-06)
    Master thesis
    Open Access
    Mediante un ejercicio comparativo, el objetivo del presente trabajo, es estimar la volatilidad de una serie financiera a través de dos algoritmos; el filtro de Kalman y el filtro de partículas, abordados en el contexto de ...
  • CONSORT 2010 statement: extension to randomised pilot and feasibility trials 

    Eldridge, Sandra; Chan, Claire L; Campbell, Michael J.; Bond, Christine M.; Hopewell, Sally; Thabane, Lethana; Lancaster, Gilian A.; Cobo Valeri, Erik (Springer, 2016-10-21)
    Article
    Open Access
    The Consolidated Standards of Reporting Trials (CONSORT) statement is a guideline designed to improve the transparency and quality of the reporting of randomised controlled trials (RCTs). In this article we present an ...
  • Contagion between United States and european markets during the recent crises 

    Muñoz Gracia, María del Pilar; Márquez Cebrián, Dolores; Sánchez Espigares, Josep Anton (2011-07)
    Article
    Open Access
    The main objective of this paper is to detect the existence of financial contagion between the North American and European markets during the recent crises. To accomplish this, the relationships between the US and the Euro ...
  • Correlation among runners and some results on the lonely runner conjecture 

    Perarnau, Guillem; Serra Albó, Oriol (2016-10-03)
    Article
    Open Access
    The Lonely Runner Conjecture, posed independently by Wills and by Cusick, states that for any set of runners running along the unit circle with constant different speeds and starting at the same point, there is a time where ...
  • Disseny d'assaig clínic seqüencial de comparació de temps de supervivència amb aproximació bayesiana i models d'Ahmed i Beta-Binomial 

    Navarro Pérez, Valentí (Universitat Politècnica de Catalunya, 2011-02)
    Master thesis
    Open Access
    Aquest treball de màster conté una proposta de disseny d'assaig clínic bayesià seqüencial basat en el model d'Ahmed pel càlcul de la supervivència i en el model conjugat beta-binomial per la variable de seguretat. A més ...
  • Disseny i anàlisi d'un assaig clínic seqüencial per a malalts d'ICTUS 

    Cerdà Ros, Maria Neus (Universitat Politècnica de Catalunya, 2015-07)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Programació amb SAS de l anàlisi de la variable principal d un assaig clínic de disseny seqüencial en pacients amb ictus. La assignació és dinàmica, minimitzant les diferències en 5 factors pronòstics mesurats immediatament ...
  • Entropy methods for sumset inequalities 

    Espuny Díaz, Alberto (Universitat Politècnica de Catalunya, 2016-07)
    Master thesis
    Open Access
    In this thesis we present several analogies betweeen sumset inequalities and entropy inequalities. We offer an overview of the different results and techniques that have been developed during the last ten years, starting ...
  • Farey graphs as models for complex networks 

    Comellas Padró, Francesc de Paula (2009-08-01)
    Article
    Open Access
    Farey sequences of irreducible fractions between 0 and 1 can be related to graph constructions known as Farey graphs. These graphs were first introduced by Matula and Kornerup in 1979 and further studied by Colbourn in ...
  • Ideal hierarchical secret sharing schemes 

    Farràs Ventura, Oriol; Padró Laimon, Carles (Springer, 2010)
    Conference report
    Open Access
    Hierarchical secret sharing is among the most natural generalizations of threshold secret sharing, and it has attracted a lot of attention from the invention of secret sharing until nowadays. Several constructions of ideal ...
  • Inequality involving sums of diferences of square roots of Fibonacci numbers 

    Díaz Barrero, José Luis (2017-05)
    Article
    Restricted access - author's decision
  • Introduction to natural language understanding and chatbots 

    Cristino Marcos, Víctor (Universitat Politècnica de Catalunya, 2018-09)
    Bachelor thesis
    Open Access
    The aim of this thesis is to give an introduction to Natural Language Understanding. Many tools and language models are described along this work in order to teach a machine the ability to analyze and understand human ...
  • Lesiones en la lucha tradicional: el caso de la lucha leonesa (2005-2015) 

    Blasco Carmona, M. J.; Casals Toquero, Martí; Fernández Villa, Tania; Langohr, Klaus (2018-12-01)
    Article
    Open Access
    El objetivo de este estudio fue describir la localización anatómica, el tipo y la gravedad de las lesiones ocurridas en las competiciones oficiales de las ligas de verano masculinas (2005-2015) de Lucha Leonesa. Al objeto ...
  • On doubling and volume: chains 

    Freiman, Gregory A.; Serra Albó, Oriol (\Institute of Mathematics, Polish Academy of Sciences\, 2018-10-01)
    Article
    Open Access
    The well-known Freiman–Ruzsa theorem provides a structural description of a set A of integers with |2A|=c|A| as a subset of a d–dimensional arithmetic progression P with |P|=c'|A|, where d and c' depend only on c. The ...
  • Optimal non-perfect uniform secret sharing schemes 

    Farràs Ventura, Oriol; Hansen, Torben; Kaced, Tarik; Padró Laimon, Carles (Springer, 2014)
    Conference report
    Open Access
    A secret sharing scheme is non-perfect if some subsets of participants that cannot recover the secret value have partial information about it. The information ratio of a secret sharing scheme is the ratio between the maximum ...
  • Safety and efficacy of thrombectomy in acute ischaemic stroke (REVASCAT): 1-year follow-up of a randomised open-label trial 

    Dávalos Errando, Antoni; Cobo Valeri, Erik; Molina, Carlos A.; Chamorro, Ángel; de Miquel, Maria Angeles; San Román, L.; Serena Leal, Joaquín; López-Cancio, Elena; Ribó, Marc; Millán, Mónica; Urra, Xabier; Cardona, Pere; Tomasello, Alejandro; Castaño, Carlos; Blasco, Jordi; Aja, Lucia; Rublera, Marta; Gomis Cortina, Meritxell; Renú, Arturo; Lara, Blanca; Fàbregas, Joan Martí; Jankowitz, Brian; Cerdà, Neus; Jovin, Tudor G. (2017-03-16)
    Article
    Open Access