Browsing by Subject "Seqüències (Matemàtica)"
Now showing items 1-20 of 23
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A data-driven learning method for constitutive modeling: application to vascular hyperelastic soft tissues
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
Article
Open AccessWe 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
(Springer, 2018)
Article
Restricted access - publisher's policyThis 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
(2006-02)
Article
Open AccessMaximal-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
(2008-03-31)
Article
Open AccessMaximal-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 ... -
Analysing gender equality in Barcelona through (spatiotemporal) segmentation
(2022-07-19)
Research report
Open AccessCitizens 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
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-26)
Article
Open AccessSequence 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
(2016-04-01)
Article
Open AccessBackground 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
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2017-06)
Master thesis
Open AccessBayesian 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
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2018-06)
Master thesis
Open AccessMediante 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 ... -
Contagion between United States and european markets during the recent crises
(2011-07)
Article
Open AccessThe 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 ... -
Disseny d'assaig clínic seqüencial de comparació de temps de supervivència amb aproximació bayesiana i models d'Ahmed i Beta-Binomial
(Universitat Politècnica de Catalunya, 2011-02)
Master thesis
Open AccessAquest 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
(Universitat Politècnica de Catalunya, 2015-07)
Master thesis (pre-Bologna period)
Restricted access - author's decisionProgramació 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 ... -
Ideal hierarchical secret sharing schemes
(Springer, 2010)
Conference report
Open AccessHierarchical 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 ... -
Introduction to natural language understanding and chatbots
(Universitat Politècnica de Catalunya, 2018-09)
Bachelor thesis
Open AccessThe 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 ... -
Inverse sampling and triangular sequential designs to compare a small proportion with a reference value
(Institut d'Estadística de Catalunya, 2002)
Article
Open AccessInverse sampling and formal sequential designs may prove useful in reducing the sample size in studies where a small population proportion p is compared with a hypothesized reference proportion p0. These methods are applied ... -
Lesiones en la lucha tradicional: el caso de la lucha leonesa (2005-2015)
(2018-12-01)
Article
Open AccessEl 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 sequential and fixed designs for estimation with comparisons and applications
(Institut d'Estadística de Catalunya, 2005)
Article
Open AccessHolaA fully sequential approach to the estimation of the difference of two population means for distributions belonging to the exponential family of distributions is adopted and compared with the best fixed design. Results ... -
Optimal non-perfect uniform secret sharing schemes
(Springer, 2014)
Conference report
Open AccessA 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
(2017-03-16)
Article
Open Access
