Departament de Matemàtiques

Recent Submissions

  • Report on the final TechTIDE products 

    Altadill, David; Belehaki, Anna; Segarra, Antoni; Blanch, Estefania; Buresova, Dalia; Ioanna, Tsagouri; Borries, Claudia; Galkin, Ivan; Haralambous, Haris; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Oikonomou, Christina; Chum, Jaroslav; Timote Bejarano, Cristhian Camilo (2019-10-31)
    External research report
    Open Access
    The document presents a report on the final products in TechTIDE. The TID identification codes in TechTIDE have been adjusted since its first release driven by the assessment of the TID impact on aerospace and ground systems ...

  • Embeddability of Kimura 3ST Markov matrices 

    Roca Lacostena, Jordi; Fernández Sánchez, Jesús (2018-05-14)
    Article
    Open Access
    In this note, we characterize the embeddability of generic Kimura 3ST Markov matrices in terms of their eigenvalues. As a consequence, we are able to compute the volume of such matrices relative to the volume of all Markov ...

  • Report on the design and specifications of the TID algorithms and products 

    Altadill, David; Belehaki, Anna; Blanch, Estefania; Buresova, Dalia; Galkin, Ivan; Juan Zornoza, José Miguel; Sanz Subirana, Jaume; Segarra, Antoni; Timote Bejarano, Cristhian Camilo (2018-05-31)
    External research report
    Open Access
    TechTIDE project, funded by the European Commission Horizon 2020 research and innovation program [AD-1], will establish a pre-operational system to demonstrate reliability of a set of TID (Travelling Ionospheric Disturbances) ...

  • Answer to the comments on “Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS” 

    Curto Subirats, Juan Jose; Juan Zornoza, José Miguel; Timote Bejarano, Cristhian Camilo (2020-04-20)
    Article
    Open Access
    Hernández-Pajares and García-Rigo have written a document criticizing our paper “Confirming geomagnetic Sfe by means of a solar flare detector based on GNSS. J Space Weather Space Clim 9: A42. https://doi.org/10.1051/swsc/2019040” ...

  • Application of manifold learning algorithms to improve the classification performance of an electronic nose 

    León Medina, Jersson Xavier; Anaya Vejar, Maribel; Pozo Montero, Francesc; Tibaduiza Burgos, Diego Alexander (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    The problem of classification and the use of robust methodologies in electronic nose sensor arrays applications are still open. Among the several steps in the developed method- ologies, it is clear that feature extraction ...

  • Enumeration of labelled 4-regular planar graphs 

    Noy Serrano, Marcos; Requilé, Clément; Rué Perna, Juan José (2019-08-01)
    Article
    Open Access
    We present the first combinatorial scheme for counting labelled 4-regular planar graphs through a complete recursive decomposition. More precisely, we show that the exponential generating function of labelled 4-regular ...

  • A new proof of the boundedness results for stable solutions to semilinear elliptic equations 

    Cabré Vilagut, Xavier (American Institute of Mathematical Sciences, 2019-12-01)
    Article
    Restricted access - publisher's policy
    We consider the class of stable solutions to semilinear equations -¿u=f(u) in a bounded smooth domain of Rn. Since 2010 an interior a priori L8 bound for stable solutions is known to hold in dimensions n=4 for all C1 ...

  • Open loop testing for optimizing the closed loop operation of chemical systems 

    Domínguez Pumar, Manuel; Olm Miras, Josep Maria; Kowalski, Lukasz; Jiménez Serres, Vicente (Pergamon Press, 2020-04-06)
    Article
    Restricted access - publisher's policy
    One way to optimize the operation of chemical systems consists on using closed loop controls while the system is operated. This way, it is possible to optimize the operating point in the plant, process or chemical system ...

  • Analysis of a thermoelastic problem of type III 

    Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (2020-06)
    Article
    Restricted access - publisher's policy
    This paper investigates several aspects of the linear type III thermoelastic theory. First, we consider the most general system of equations for this theory in the case that the conductivity rate is not definite and we ...

  • Lord–Shulman thermoelasticity with microtemperatures 

    Bazarra, Noelia; Fernández, José Ramón; Quintanilla de Latorre, Ramón (2020-06-06)
    Article
    Restricted access - publisher's policy
    In this paper we consider the Lord–Shulman thermoelastic theory with porosity and microtemperatures. The new aspect we propose here is to introduce a relaxation param- eter in the microtemperatures. Then we obtain an ...

  • The quality of urban air in Barcelona: a new approach applying compositional data analysis methods 

    Gibergans Bàguena, José; Hervada Sala, Carme; Jarauta Bragulat, Eusebio (Ital Publication, 2020-04)
    Article
    Open Access
    The main goal of this paper is to go some steps further to improve the understanding and manageability of air quality. Quality of atmospheric air in large cities is a matter of great importance because of its impact on the ...

  • Static output-feedback vibration control of seismically excited buildings: an effective multistep approach 

    Palacios Quiñonero, Francisco; Rubió Massegú, Josep; Rossell Garriga, Josep Maria; Karimi, Hamid Reza (Academic Press - Elsevier, 2020-06)
    Part of book or chapter of book
    Restricted access - publisher's policy
    Static output-feedback (SOF) controllers are particularly interesting for vibration control of complex structures under a multiactuation scheme. In this chapter, we present a novel iterative linear matrix inequality ...

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