Ara es mostren els items 1-20 de 35

    • A data-driven learning method for constitutive modeling: application to vascular hyperelastic soft tissues 

      González Ibáñez, David; García González, Alberto; Chinesta Soria, Francisco; Cueto Prendes, Elias (Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
      Article
      Accés obert
      We address the problem of machine learning of constitutive laws when large experimental deviations are present. This is particularly important in soft living tissue modeling, for instance, where large patient-dependent ...
    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Absolute type shaft encoding using LFSR sequences with prescribed length 

      Fuertes Armengol, José Mª; Balle, Borja; Ventura Capell, Enric (2006-02)
      Article
      Accés obert
      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 ...
    • 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
      Accés obert
      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 ...
    • An approximate structure theorem for small sumsets 

      Campos, Marcelo; Coulson, Matthew John; Serra Albó, Oriol; Wötzel, Maximilian (Birkhäuser, 2021-08-24)
      Capítol de llibre
      Accés obert
      Let A and B be randomly chosen s-subsets of the first n integers such that their sumset A+B has size at most Ks. We show that asymptotically almost surely A and B are almost fully contained in arithmetic progressions PA ...
    • Analysing gender equality in Barcelona through (spatiotemporal) segmentation 

      Montero Mercadé, Lídia; Mejía-Dorantes, Lucía; Barceló Bugeda, Jaime (2022-07-19)
      Report de recerca
      Accés obert
      Citizens take part in different activities to satisfy their needs, to invest in their socio-economic progress, participate in social and health activities that improve their well-being. However, activity participation is ...
    • Applying data analytics to analyze activity sequences for an assessment of fragmentation in daily travel patterns: a case study of the metropolitan region of Barcelona 

      Montero Mercadé, Lídia; Mejía-Dorantes, Lucía; Barceló Bugeda, Jaime (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-26)
      Article
      Accés obert
      Sequence analysis is a robust methodological approach that has gained popularity in various fields, including transportation research. It provides a comprehensive way to understand the dynamics and patterns of individual ...
    • 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
      Accés obert
      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 ...
    • Bayesian Optimization in Machine Learning 

      Jiménez Luna, José (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2017-06)
      Projecte Final de Màster Oficial
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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
      Accés obert
      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
      Accés obert
      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 Llobet, Guillem; Serra Albó, Oriol (2016-10-03)
      Article
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...
    • Extremal Sidon sets are Fourier uniform, with applications to partition regularity 

      Ortega Sánchez Colomer, Miquel; Prendiville, Sean (2023-01-01)
      Article
      Accés obert
      Generalising results of Erdos-Freud and Lindström, we prove that the largest Sidon subset of a bounded interval of integers is equidistributed in Bohr neighbourhoods. We establish this by showing that extremal Sidon sets ...
    • Farey graphs as models for complex networks 

      Comellas Padró, Francesc de Paula (2009-08-01)
      Article
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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
      Accés restringit per decisió de l'autor