Ara es mostren els items 4786-4805 de 244457

    • A MAP approach for convex non-negative matrix factorization in the diagnosis of brain tumors 

      Vilamala Muñoz, Albert; Belanche Muñoz, Luis Antonio; Vellido Alcacena, Alfredo (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Convex non-negative matrix factorization is a blind signal separation technique that has previously demonstrated to be well-suited for the task of human brain tumor diagnosis from magnetic resonance spectroscopy data. This ...
    • A map characterizing the fuzzy points and columns of a T-indistinguishability operator 

      Boixader Ibáñez, Dionís; Recasens Ferrés, Jorge (2005-10)
      Article
      Accés obert
      A new map (ΛE) between fuzzy subsets of a universe X endowed with a T-indistinguishability operator E is introduced. The main feature of ΛE is that it has the columns of E as fixed points, and thus it provides us with a ...
    • A Maple package for semidefinite programming 

      Xhafa Xhafa, Fatos; Navarro, Gonzalo (1996-05-02)
      Report de recerca
      Accés obert
      We present a package in Maple for solving Semidefinite Programming. Semidefinite Programming (SP) is the problem of optimizing a linear function of a symmetric matrix subject to linear equality constraints and ...
    • A margin adaptive scheduling algorithm for FBMC/OQAM systems 

      Caus López, Marius; Pérez Neira, Ana Isabel; Moretti, Marco; Kliks, Adrian (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper addresses the margin adaptive problem for the filter bank multicarrier (FBMC) modulation based on the offset QAM (OQAM), referred to as FBMC/OQAM. The analysis conducted in this paper reveals that due to the ...
    • A Markovian-based simulation model for the evolution of employees’ emotional states during an organizational change 

      Castillo Gutiérrez, Cristian; Fernández Alarcón, Vicenç; Lordan González, Oriol (2021-06-30)
      Article
      Accés obert
      This study aims to create a simulation model with which to analyse the spread of emotional states among the employees of an organization. The model takes into account the fact that workers are influenced by their co-workers ...
    • A massive data processing approach for effective trustworthiness in online learning groups 

      Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep (2015-06-10)
      Article
      Accés obert
      This paper proposes a trustworthiness-based approach for the design of secure learning activities in online learning groups. Although computer-supported collaborative learning has been widely adopted in many educational ...
    • A Massively Parallel Algorithm for the Approximate Calculation of Inverse p-th Roots of Large Sparse Matrices 

      Lass, Michael; Mohr, Stephan; Wiebeler, Hendrik; Kühne, Thomas D.; Plessl, Christian (Association for Computing Machinery (ACM), 2018-07)
      Comunicació de congrés
      Accés obert
      We present the submatrix method, a highly parallelizable method for the approximate calculation of inverse p-th roots of large sparse symmetric matrices which are required in different scientific applications. Following ...
    • A massively parallel implementation of multilevel Monte Carlo for finite element models 

      Badia, Santiago; Hampton, Jerrad; Principe, Ricardo Javier (2023-11-01)
      Article
      Accés obert
      The Multilevel Monte Carlo (MLMC) method has proven to be an effective variance-reduction statistical method for Uncertainty Quantification (UQ) in Partial Differential Equation (PDE) models, combining model computations ...
    • A master equation for force distributions in polydisperse frictional particles 

      Saitoh, Kuniyasu; Magnanimo, Vanessa; Luding, Stefan (CIMNE, 2015)
      Text en actes de congrés
      Accés obert
      An incremental evolution equation, i.e. a Master equation in statistical mechanics, is introduced for force distributions in polydisperse frictional particle packings. As basic ingredients of the Master equation, the ...
    • A material characterisation framework for assessing brickwork masonry arch bridges: from material level to component level testing 

      Liu, Bowen; Drougkas, Anastasios; Sarhosis, Vasilis (2023-09)
      Article
      Accés obert
      This paper aims to present a systematic framework for material characterisation to assess brickwork masonry arch bridges. An extensive laboratory campaign was carried out to characterise brickwork and backfill material in ...
    • A materialidade da luz. A imaterialidade do sólido. Casa Guiette. Antuérpia 1926. 

      Lepori, Ana Paula de Oliveira (Associació d'idees. Centre d'Investigacions Estètiques, 2005)
      Article
      Accés obert
    • A mathematical approach and review of the modeling of taxi services 

      Estrada Romeu, Miguel Ángel; Salanova Grau, Josep Maria (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a mathematical model for the estimation of the key performance indicators of the taxi markets in urban areas. These key parameters are basically the demand and supply for taxi services, the waiting time ...
    • A mathematical approach to virus therapy of glioblastomas 

      López de Rioja, Víctor; Isern, N.; Fort, J. (2016-12)
      Article
      Accés obert
      It is widely believed that the treatment of glioblastomas (GBM) could benefit from oncolytic virus therapy. Clinical research has shown that Vesicular Stomatitis Virus (VSV) has strong oncolytic properties. In addition, ...
    • A Mathematical Autobiographity 

      Goldberg, Michael (Université du Quebéc à Montréal / Université du Quebéc à Montréal, 1980)
      Article
      Accés obert
      Extrait de son autobiographie mathématique. “Mes recherches mathématiques proviennent en partie de l’intérèt que je Porte aux problèmes de dissection. J’ai montré, par exemple, comment découper un pentagone régulier en six ...
    • A mathematical formulation of the loop pipelining problem 

      Cortadella, Jordi; Badia Sala, Rosa Maria; Sánchez Carracedo, Fermín (Universitat Politècnica de Catalunya (UPC), 1996)
      Text en actes de congrés
      Accés obert
      This paper presents a mathematical model for the loop pipelining problem that considers several parameters for optimization and supports any combination of resource and timing constraints. The unrolling degree of the loop ...
    • A mathematical framework for structural control integration 

      Rossell Garriga, Josep Maria; Rodellar Benedé, José; Palacios Quiñonero, Francisco; Rubió Massegú, Josep (Trans Tech Publications, 2012)
      Text en actes de congrés
      Accés obert
      In this paper, some control strategies to design decentralized controllers are developed and discussed. These strategies are based on the Inclusion Principle, a very useful mathematical framework to obtain decentralized ...
    • A mathematical model coupling tumor growth and angiogenesis 

      Xu, Jiangping; Vilanova Caicoya, Guillermo; Gómez Díaz, Héctor (Public Library of Science (PLOS), 2016-02-18)
      Article
      Accés obert
      We present a mathematical model for vascular tumor growth. We use phase fields to model cellular growth and reaction-diffusion equations for the dynamics of angiogenic factors and nutrients. The model naturally predicts ...
    • A mathematical model for ammonium removal and recovery from real municipal wastewater using a natural zeolite 

      Sheikh, Mahdi; Vallés Nebot, Víctor; Valderrama Angel, César Alberto; Cortina Pallás, José Luís; Rezakazemi, Mashallah (Elsevier, 2023-10-01)
      Article
      Accés restringit per política de l'editorial
      A study was carried out to remove/recover ammonium (NH4+) from residual effluents in tertiary treatment by sorption/desorption processes onto a natural clinoptilolite zeolite (NZ) in batch and fixed-bed column systems. ...
    • A mathematical model for dynamic memory networks 

      Fàbrega Canudas, José; Fiol Mora, Miquel Àngel; Serra Albó, Oriol; Andrés Yebra, José Luis (Iniciativa Digital Politècnica, 2011)
      Text en actes de congrés
      Accés obert
      The aim of this paper is to bring together the work done several years ago by M.A. Fiol and the other authors to formulate a quite general mathematical model for a kind of permutation networks known as dynamic memories. A ...
    • A mathematical model for the COVID-19 pandemic in Tokyo through changing point calculus 

      Martínez Vázquez, Laura; Fonseca Casas, Pau (Multidisciplinary Digital Publishing Institute, 2023-11-12)
      Article
      Accés obert
      The great social and economic impact that the COVID-19 pandemic has had on a global level has encouraged the development of new mathematical models that make it possible to better manage this and future pandemics. Here, ...