Now showing items 712-731 of 988

    • 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 refined Isogeometric Analysis in 3D 

      Siwik L.; Wozniak M.; Trujillo V.; Pardo D.; Calo V.M.; Paszynski M. (IEEE Transactions on Parallel and Distributed Systems, 2018-11)
      We study three-dimensional isogeometric analysis (IGA) and the solution of the resulting system of linear equations via a direct solver. IGA uses highly continuous $C^{p-1}$ basis functions, which provide multiple benefits ...
    • 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 ...
    • Patient-specific modelling of cortical spreading depression applied to migraine studies 

      Kroos J.M. (2019-06-17)
      Migraine is a common neurological disorder and one-third of migraine patients suffer from migraine aura, a perceptual disturbance preceding the typically unilateral headache. Cortical spreading depression (CSD), a ...
    • 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 ...
    • perm mateda: A matlab toolbox of estimation of distribution algorithms for permutation-based combinatorial optimization problems 

      Irurozki E.; Ceberio J.; Santamaria J.; Santana R.; Mendiburu A. (ACM Transactions on Mathematical Software, 2018)
      Permutation problems are combinatorial optimization problems whose solutions are naturally codified as permutations. Due to their complexity, motivated principally by the factorial cardinality of the search space of ...
    • 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. ...
    • Perverse sheaves on semi-abelian varieties -- a survey of properties and applications 

      Liu Y.; Maxim L.; Wang B. (European Journal of Mathematics, 2019-05)
      We survey recent developments in the study of perverse sheaves on semi-abelian varieties. As concrete applications, we discuss various restrictions on the homotopy type of complex algebraic manifolds (expressed in terms ...
    • 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, ...