Browsing Artículos (Matemática Aplicada I) by Title
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2D granular flows with the μ(I) rheology and side walls friction: A wellbalanced multilayer discretization [Article]
(Elsevier Inc., 201803)We present here numerical modelling of granular flows with the rheology in confined channels. The contribution is twofold: (i) a model to approximate the Navier–Stokes equations with the rheology through an asymptotic ...

3filiform Leibniz algebras of maximum length [Article]
(Springer, 2016)This work completes the study of the solvable Leibniz algebras, more precisely, it completes the classi cation of the 3 liform Leibniz algebras of maximum length [4]. Moreover, due to the good structure of the algebras ...

3D wellcomposed polyhedral complexes [Article]
(2015)A binary threedimensional (3D) image II is wellcomposed if the boundary surface of its continuous analog is a 2D manifold. In this paper, we present a method to locally “repair” the cubical complex Q(I)Q(I) (embedded in ...

A Class of Computationally Fast First Order Finite Volume Solvers: PVM Methods [Article]
(Society for Industrial and Applied Mathematics, 2012)In this work, we present a class of fast first order finite volume solvers, named as PVM (Polynomial Viscosity Matrix), for balance laws or, more generally, for nonconservative hyperbolic systems. They are defined in terms ...

A computational algebraic geometry approach to analyze pseudorandom sequences based on Latin squares [Article]
(Springer, 2019)Latin squares are used as scramblers on symmetrickey algorithms that generate pseudorandom sequences of the same length. The robustness and effectiveness of these algorithms are respectively based on the extremely large ...

A computational algebraic geometry approach to enumerate Malcev magma algebras over finite fields [Article]
(Wiley, 2016)The set of Mn(K) of ndimensional Malcev magma algebras over a finite field can be identified with algebraic sets defined by zerodimensional radical ideals for which the computation of their reduced Gröbner bases makes ...

A consistent intermediate wave speed for a wellbalanced HLLC solver. [Article]
(GauthierVillars, 2008)In this work, we present a HLLC scheme modification for application to nonhomogeneous shallowwater equations with pollutant transport. This new version is related to the definition of a consistent approximation of the ...

A continuous analog for 4dimensional objects [Article]
(2013)In this paper, we follow up on the studies developed by Kovalevsky (Comput Vis Graph Image Process 46:141–161, 1989) and Kenmochi et al. (Comput Vis Image Underst 71:281–293, 1998), which defined a continuous analog for a ...

A general approach for the location of transfer points on a network with a trip covering criterion and mixed distances [Article]
(Elsevier, 2017)In this paper we consider a trip covering location model in a mixed planarnetwork space. An embed ded network in the plane represents an alternative transportation system in which traveling is fasterthan traveling within ...

A HLLC scheme for nonconservative hyperbolic problems. Application to turbidity currents with sediment transport. [Article]
(Cambridge University Press, 2013)This paper focuses on the generalization of the HLLC Riemann solver for nonconservative problems. First, the general ideas of the extension of the HLLC solvers for nonconservative systems are discussed. Then, two particular ...

A logicalgebraic tool for reasoning with KnowledgeBased Systems [Article]
(Elsevier, 2018)A detailed exposition of foundations of a logicalgebraic model for reasoning with knowledge bases speci ed by propositional (Boolean) logic is presented. The model is conceived from the logical translation of usual ...

A Mixed Heuristic for Generating Cocyclic Hadamard Matrices [Article]
(Springer, 2018)A way of generating cocyclic Hadamard matrices is described, which combines a new heuristic, coming from a novel notion of fitness, and a peculiar local search, defined as a constraint satisfaction problem. Calculations ...

A multilayer method for the hydrostatic NavierStokes equations: a particular weak solution [Article]
(Ed. Plenum Press, 2014)In this work we present a mutilayer approach to the solution of nonstationnary 3D NavierStokes equations. We use piecewise smooth weak solutions. We approximate the velocity by a piecewise constant (in z) horizontal ...

A multilayer shallow model for dry granular ows with the (I)rheology: application to granular collapse on erodible beds [Article]
(Cambridge University Press, 2016)In this work we present a multilayer shallow model to approximate the Navier–Stokes equations with the μ(I)μ(I)rheology through an asymptotic analysis. The main advantages of this approximation are (i) the low cost ...

A multilayer shallow water system for polydisperse sedimentation [Article]
(Elsevier, 2013)This work considers the flow of a fluid containing one disperse substance consisting of small particles that belong to different species differing in size and density. The flow is modelled by combining a multilayer shallow ...

A new 2D tessellation for angle problems: The polar diagram [Article]
(2006)The new approach we propose in this paper is a plane partition with similar features to those of the Voronoi Diagram, but the Euclidean minimum distance criterion is replaced for the minimal angle criterion. The result is ...

A new bound on the Morse index of constant mean curvature tori of revolution in S3 [Article]
(Springer, 2012)In this work we give a new lower bound on the Morse index for constant mean curvature tori of revolution immersed in the threesphere S3, by computing some explicit negative eigenvalues for the corresponding Jacobi operator.

A new entropy based summary function for topological data analysis [Article]
(Elsevier, 2018)Topological data analysis (TDA) aims to obtain useful information from data sets using topological concepts. In particular, it may help to infer from nite sample when a con guration space is a manifold. So far, there ...

A new SavageHutter type model for submarine avalanches and generated tsunami [Article]
(Elsevier, 2008)In this paper we present a new twolayer model of SavageHutter type to study submarine avalanches. A layer composed of fluidized granular material is assumed to flow within an upper layer composed of an inviscid fluid (e. ...

A new topological entropybased approach for measuring similarities among piecewise linear functions [Article]
(Elsevier, 2017)In this paper we present a novel methodology based on a topological entropy, the socalled persistent entropy, for addressing the comparison between discrete piecewise linear functions. The comparison is certi ed by the ...