Now showing items 607-626 of 847

    • Parabolic H-measures 

      Antonić N.; Lazar M. (Journal of Functional Analysis, 2013-12-31)
      Classical H-measures introduced by Tartar (1990) and independently by Gérard (1991) are not well suited for the study of parabolic equations. Recently, several parabolic variants have been proposed, together with a number ...
    • A parallel Branch-and-Fix Coordination based matheuristic algorithm for solving large sized multistage stochastic mixed 0-1 problems 

      Aldasoro U.; Escudero L.F.; Merino M.; Pérez G. (European Journal of Operational Research, 2016-08-26)
      A parallel matheuristic algorithm is presented as a spin-off from the exact Branch-and-Fix Coordination (BFC) algorithm for solving multistage stochastic mixed 0-1 problems. Some steps to guarantee the solution’s optimality ...
    • Parallel Schwarz wave form relaxation algorithm for an n-dimensional semilinear heat equation 

      Tran M.-B. (ESAIM Mathematical Modelling and Numerical Analysis, 2014-12-31)
      We present in this paper a proof of well-posedness and convergence for the parallel Schwarz Waveform Relaxation Algorithm adapted to an N-dimensional semilinear heat equation. Since the equation we study is an evolution ...
    • Parallelizing the Kolmogorov-Fokker-Planck Equation 

      Gerardo-Giorda L.; Tran M.-B. (ESAIM M2AN: Mathematical Modelling and Numerical Analysis, 2015-12-31)
      We design two parallel schemes, based on Schwarz Waveform Relaxation (SWR) procedures, for the numerical solution of the Kolmogorov equation. The latter is a simplified version of the Fokker-Planck equation describing the ...
    • Parameterization of Invariant Manifolds for Periodic Orbits I: Efficient Numerics via the Floquet Normal Form 

      Castelli R.; Lessard J.-P.; James J.D.M. (SIAM Journal on Applied Dynamical Systems, 2015-12-31)
      We present an efficient numerical method for computing Fourier-Taylor expansions of (un)stable manifolds associated with hyperbolic periodic orbits. Three features of the method are that (1) we obtain accurate representation ...
    • Partial regularity and smooth topology-preserving approximations of rough domains 

      Ball J.M.; Zarnescu A. (Calculus of Variations and Partial Differential Equations, 2017-01-01)
      For a bounded domain $\Omega\subset\mathbb{R}^m, m\geq 2,$ of class $C^0$, the properties are studied of fields of `good directions', that is the directions with respect to which $\partial\Omega$ can be locally represented ...
    • Particle Morphology 

      Mercado Y.R.; Akhmatskaya E.; Leiza J.R.; Asua J.M. (Chemistry and Technology of Emulsion Polymerisation: Second Edition, 2013-12-31)
      This chapter discusses the morphology of latex particles obtained mainly by (mini)emulsion polymerisation. It describes some applications of these particles, and discusses the factors that influence the particle morphology. ...
    • A partition of unity finite element method for computational diffusion MRI 

      Nguyen V.D.; Jansson J.; Hoffman J.; Li J.R. (Journal of Computational Physics, 2018)
      The Bloch–Torrey equation describes the evolution of the spin (usually water proton) magnetization under the influence of applied magnetic field gradients and is commonly used in numerical simulations for diffusion MRI ...
    • Path Planning for Single Unmanned Aerial Vehicle by Separately Evolving Waypoints 

      Yang P.; Tang K.; Lozano J.A.; Cao X. (IEEE Transactions on Robotics, 2015-12-31)
      Evolutionary algorithm-based unmanned aerial vehicle (UAV) path planners have been extensively studied for their effectiveness and flexibility. However, they still suffer from a drawback that the high-quality waypoints in ...
    • Patient-specific computational modeling of Cortical Spreading Depression via Diffusion Tensor Imaging 

      Kroos J.M.; Marinelli I.; Diez I.; Cortes J.M.; Stramaglia S.; Gerardo-Giorda L. (International Journal for Numerical Methods in Biomedical Engineering, 2016-06-29)
      Cortical Spreading Depression (CSD), a depolarization wave originat- ing in the visual cortex and traveling towards the frontal lobe, is com- monly accepted as a correlate of migraine visual aura. As of today, little is ...
    • Penalized composite link mixed models for two-dimensional count data 

      Ayma D.; Durbán M.; Lee D.-J.; Eilers P.H.C. (2015-05)
      Mortality data provide valuable information for the study of the spatial distribution of mortality risk, in disciplines such as spatial epidemiology, medical demography, and public health. However, they are often available ...
    • Penalized composite link models for aggregated spatial count data: a mixed model approach 

      Ayma D.; Durbán M.; Lee D.-J.; Eilers P.H.C. (Spatial Statistics, 2016-01-01)
      Mortality data provide valuable information for the study of the spatial distri- bution of mortality risk, in disciplines such as spatial epidemiology and public health. However, they are frequently available in an aggregated ...
    • Performance of a multi-frontal parallel direct solver for hp-finite element method 

      Paszynski M.; Pardo D.; Torres-Verdín C. (Proceedings of the IASTED International Conference on Advances in Computer Science and Engineering, ACSE 2009, 2009-12-31)
      In this paper we present the performance of our parallel multi-frontal direct solver when applied to solve linear systems of equations resulting from discretizations of a hp Finite Element Method (hp-FEM). The hp-FEM ...
    • Permanence and extinction for a nonautonomous SEIRS epidemic model 

      Kuniya T.; Nakata Y. (Applied Mathematics and Computation, 2012-12-31)
      In this paper, we study the long-time behavior of a nonautonomous SEIRS epidemic model. We obtain new sufficient conditions for the permanence (uniform persistence) and extinction of infectious population of the model. By ...
    • Permanence and global stability of a class of discrete epidemic models 

      Muroya Y.; Nakata Y.; Izzo G.; Vecchio A. (Nonlinear Analysis: Real World Applications, 2011-12-31)
      In this paper we investigate the permanence of a system and give a sufficient condition for the endemic equilibrium to be globally asymptotically stable, which are the remaining problems in our previous paper (G. Izzo, Y. ...
    • PetIGA-MF: A multi-field high-performance toolbox for structure-preserving B-splines spaces 

      Sarmiento A.F.; Côrtes A.M.A.; Garcia D.; Dalcin L.; Collier, N.; Calo V.M. (Journal of Computational Science, 2017-01)
      We describe a high-performance solution framework for isogeometric discrete differential forms based on B-splines: PetIGA-MF. Built on top of PetIGA, an open-source library we have built and developed over the last decade, ...
    • Predicting Pregnancy Outcomes Using Longitudinal Information: A Penalized Splines Mixed–Effects Model Approach 

      De la Cruz R.; Fuentes C.; Meza C.; Lee D.-J.; Arribas-Gil A. (Statistics in Medicine, 2017-02-09)
      We propose a semiparametric mixed–effects model (SNMM) using penalized splines to clas- sify longitudinal data and improve the prediction of a binary outcome. The work is motivated by a study in which different hormone ...
    • PrEveCOPD: A computer application to predict adverse events in the short-term evolution of patients with exacerbation of COPD 

      Arostegui I.; Legarreta Maria J.; Barrio I.; Esteban C.; Garcia-Gutierrez S.; Quintana J.M.; IRYSS-COPD Group (Journal of Medical Internet Research, 2018)
      Background: Chronic obstructive Pulmonary Disease (COPD) is a common chronic disease. Exacerbations of COPD (eCOPD) contribute to worsening of the disease and patient´s evolution. There are some clinical prediction rules ...
    • Price of anarchy in non-cooperative load balancing games 

      Ayesta U.; Brun O.; Prabhu B.J. (Performance Evaluation, 2011-12-31)
      We investigate the price of anarchy of a load balancing game with K dispatchers. The service rates and holding costs are assumed to depend on the server, and the service discipline is assumed to be processor-sharing at ...
    • Pro-C congruence properties for groups of rooted tree automorphisms 

      Garrido A.; Uria-Albizuri J. (Archiv der Mathematik, 2018-11-21)
      We propose a generalisation of the congruence subgroup problem for groups acting on rooted trees. Instead of only comparing the profinite completion to that given by level stabilizers, we also compare pro-$\mathcal{C}$ ...