Recent Submissions

  • The geometry of Hermitian self-orthogonal codes 

    Ball, Simeon Michael; Vilar Algueró, Ricard (Elsevier, 2021-12-20)
    Article
    Restricted access - publisher's policy
    We prove that if n>k2 then a k-dimensional linear code of length n over Fq2 has a truncation which is linearly equivalent to a Hermitian self-orthogonal linear code. In the contrary case we prove that truncations of linear ...
  • Graph polynomials and group coloring of graphs 

    Bosek, Bartlomiej; Grytczuk, Jaroslaw; Gutowski, Grzegorz; Serra Albó, Oriol; Zajac, Mariusz (2022-05-01)
    Article
    Open Access
    Let A be an Abelian group and let G be a simple graph. We say that G is A-colorable if, for some fixed orientation of G and every edge labeling l:E(G)¿A, there exists a vertex coloring c by the elements of A such that ...
  • Early fault detection in the main bearing of wind turbines based on Gated Recurrent Unit (GRU) neural networks and SCADA data 

    Encalada-Dávila, Ángel; Moyón, Luis; Tutivén Gálvez, Christian; Puruncajas Maza, Bryan; Vidal Seguí, Yolanda (Institute of Electrical and Electronics Engineers (IEEE), 2022)
    Article
    Open Access
    Failures in the main bearings of wind turbines are critical in terms of downtime and replacement cost. Early diagnosis of their faults would lower the levelized cost of wind energy. Thus, this work discusses a gated recurrent ...
  • Legibilidad y letras 

    Molinero Albareda, Xavier; Laamiri, Arm (2022)
    Conference report
    Open Access
    In the present, there are different indices that measure the difficulty level of reading a text, i.e. the readability of a text. Different studies have been made on the frequency of occurrence of letters in several languages, ...
  • Optimal control of variable-speed wind turbines modeled as Markov jump systems 

    Vargas, Alessandro N.; Acho Zuppa, Leonardo (2022-07)
    Article
    Restricted access - publisher's policy
    This paper shows the solution for the control problem of operating wind turbines through Markov jump nonlinear systems. The idea is to represent wind speed acting on the turbine blades into modes of Markov chain. The main ...
  • Bohr-Sommerfeld quantization of b-symplectic toric manifolds 

    Miranda Galcerán, Eva; Mir Garcia, Pau; Weitsman, Jonathan (2022-03-07)
    Research report
    Open Access
    We define the Bohr-Sommerfeld quantization via T-modules for a b-symplectic toric manifold and show that it coincides with the formal geometric quantization of [GMW18b]. In particular, we prove that its dimension is given ...
  • SARS-CoV2 hospital surveillance and control system with contact tracing for patients and health care workers at a large reference hospital in Spain during the first wave: An observational descriptive study 

    Llupià, Anna; De la Torre, Laura; Olivé, Victòria; Baron Miras, Lourdes; Marín, Clara; Solé Sugrañes, L.; Torá Rocamora, Isabel; Guinovart Florensa, Caterina; García Basteiro, Alberto L.; VILELLA, A; Puig Sadurní, Joaquim (John Wiley & sons, 2022-03)
    Article
    Open Access
    Background and Aims During the first peak of the COVID-19 pandemic, the Preventive Medicine Department and the Occupational Health Department at Hospital Clinic de Barcelona (HCB), a large Spanish referral hospital, developed ...
  • b-Structures on Lie groups and Poisson reduction 

    Miranda Galcerán, Eva; Kiesenhofer, Anna; Braddell, Roisin (2022-02-11)
    Article
    Restricted access - publisher's policy
    Motivated by the group of Galilean transformations and the subgroup of Galilean transformations which fix time zero, we introduce the notion of a b-Lie group as a pair where G is a Lie group and H is a codimension-one Lie ...
  • Rank axioms and supersimplicity 

    Cárdenas Martín, Santiago; Farré Cirera, Rafael (2022-02-13)
    Research report
    Open Access
    Just as Lascar’s notion of abstract rank axiomatizes the U rank, we propose axioms for the ranks SUd and SUf , the foundation ranks of dividing and forking. We study the relationships between these axioms. As with superstable, ...
  • Universal singular exponents in catalytic variable equations 

    Drmota, Michael; Noy Serrano, Marcos; Yu, Guan-Ru (2021-08-19)
    Article
    Restricted access - publisher's policy
    Catalytic equations appear in several combinatorial applications, most notably in the enumeration of lattice paths and in the enumeration of planar maps. The main purpose of this paper is to show that the asymptotic estimate ...
  • Early fault diagnosis strategy for WT main bearings based on SCADA data and one-class SVM 

    Tutivén Gálvez, Christian; Vidal Seguí, Yolanda; Insuasty, Andrés; Campoverde-Vilela, Lorena; Achicanoy, Wilson (2022-06-16)
    Article
    Open Access
    To reduce the levelized cost of wind energy, through the reduction in operation and maintenance costs, it is imperative that the wind turbine downtime is reduced through maintenance strategies based on condition monitoring. ...
  • A deep learning pproach for the morphological recognition of reactive lymphocytes in patients with COVID-19 infection 

    Rodellar Benedé, José; Barrera Llanga, Kevin Iván; Alférez Baquero, Edwin Santiago; Boldú Nebot, Laura; Laguna Moreno, Javier; Molina Borrás, Ángel; Merino González, Anna (2022-05-23)
    Article
    Open Access
    Laboratory medicine plays a fundamental role in the detection, diagnosis and management of COVID-19 infection. Recent observations of the morphology of cells circulating in blood found the presence of particular reactive ...

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