Now showing items 1-20 of 939

• #### 2-D euler shape design on nonregular flows using adjoint rankine-hugoniot relations ﻿

(AIAA Journal, 2009-12-31)
Optimal aerodynamic shape design aims to find the minimum of a functional that describes an aerodynamic property, by controlling the partial differential equation modeling the dynamics of the flow that surrounds an aircraft, ...
• #### A Bochev-Dohrmann-Gunzburger stabilization method for the primitive equations of the ocean ﻿

(Applied Mathematics Letters, 2013-12-31)
We introduce a low-order stabilized discretization of the primitive equations of the ocean with highly reduced computational complexity. We prove stability through a specific inf-sup condition, and weak convergence to a ...
• #### A class of CTRWs: Compound fractional poisson processes ﻿

This chapter is an attempt to present a mathematical theory of compound fractional Poisson processes. It begins with the characterization of a well-known Lévy process: The compound Poisson process. The semi-Markov extension ...
• #### A comparison of the String Gradient Weighted Moving Finite Element method and a Parabolic Moving Mesh Partial Differential Equation method for solutions of partial differential equations ﻿

(Central European Journal of Mathematics, 2013-12-31)
We compare numerical experiments from the String Gradient Weighted Moving Finite Element method and a Parabolic Moving Mesh Partial Differential Equation method, applied to three benchmark problems based on two different ...
• #### A computational model of open-irrigated electrode for endocardial RF catheter ablation ﻿

(Computing in Cardiology, 2016-01-01)
Radiofrequency catheter ablation (RFCA) is an important curative treatment for cardiac arrhythmias. However, during RFCA thrombus formation can occur when the electrode-tissue interface temperature exceeds 80Â°C. Open-irrigated ...
• #### A decision tree to assess short-term mortality after an emergency department visit for an exacerbation of COPD: A cohort study ﻿

(Respiratory Research, 2015-12-31)
Background: Creating an easy-to-use instrument to identify predictors of short-term (30/60-day) mortality after an exacerbation of chronic obstructive pulmonary disease (eCOPD) could help clinicians choose specific measures ...
• #### A differential equation with state-dependent delay from cell population biology ﻿

(Journal of Differential Equations, 2015-12-31)
We analyze a differential equation, describing the maturation of a stem cell population, with a state-dependent delay, which is implicitly defined via the solution of an ODE. We elaborate smoothness conditions for the model ...
• #### A functional limit theorem for stochastic integrals driven by a time-changed symmetric sigma-stable Levy process ﻿

(Stochastic Processes and their Applications, 2014-12-31)
Under proper scaling and distributional assumptions, we prove the convergence in the Skorokhod space endowed with the $M_1$-topology of a sequence of stochastic integrals of a deterministic function driven by a time-changed ...
• #### A Geometric Toolbox for Tetrahedral Finite Element Partitions ﻿

(Efficient Preconditioned Solution Methods for Elliptic Partial Differential Equations, 2011-12-31)
In this work we present a survey of some geometric results on tetrahedral partitions and their refinements in a unified manner. They can be used for mesh generation and adaptivity in practical calculations by the finite ...
• #### A hybrid method for inversion of 3D DC resistivity logging measurements ﻿

(Natural Computing, 2014-12-31)
This paper focuses on the application of hp hierarchic genetic strategy (hp-HGS) for solution of a challenging problem, the inversion of 3D direct current (DC) resistivity logging measurements. The problem under consideration ...
• #### A Hyperbolic system and the cost of the controllability for the Stokes system ﻿

(Computational and Applied Mathematics, 2014-12-31)
• #### A kinetic scheme for transient mixed flows in non uniform closed pipes: A global manner to upwind all the source terms ﻿

(Journal of Scientific Computing, 2011-12-31)
We present a numerical kinetic scheme for an unsteady mixed pressurized and free surface model. This model has a source term depending on both the space variable and the unknown U of the system. Using the Finite Volume and ...
• #### A lower bound on local energy of partial sum of eigenfunctions for Laplace-Beltrami operators ﻿

(ESAIM - Control, Optimisation and Calculus of Variations, 2013-12-31)
In this paper, a lower bound is established for the local energy of partial sum of eigenfunctions for Laplace-Beltrami operators (in Riemannian manifolds with low regularity data) with general boundary condition. This ...
• #### A mathematical model for unsteady mixed flows in closed water pipes ﻿

(Science China Mathematics, 2012-12-31)
We present the formal derivation of a new unidirectional model for unsteady mixed flows in nonuniform closed water pipes. In the case of free surface incompressible flows, the FS-model is formally obtained, using formal ...
• #### A Mean-field model for spin dynamics in multilayered ferromagnetic media ﻿

(Multiscale Modeling and Simulation, 2015-12-31)
In this paper, we develop a mean-field model for describing the dynamics of spintransfer torque in multilayered ferromagnetic media. Specifically, we use the techniques of Wigner transform and moment closure to connect the ...
• #### A model for stem cell population dynamics with regulated maturation delay ﻿

(Discrete and Continuous Dynamical Systems- Series A, 2011-12-31)
We develop a structured population model for the maturation process of stem cells in the form of a state-dependent delay differential equation. Moreover, results on existence, uniqueness and positivity of solutions as well ...
• #### A modeling framework for optimizing the flow-level scheduling with time-varying channels ﻿

(Performance Evaluation, 2010-12-31)
We introduce a comprehensive modeling framework for the problem of scheduling a finite number of finite-length jobs where the available service rate is time-varying. The main motivation comes from wireless data networks ...
• #### A modified discontinuous Galerkin method for solving efficiently Helmholtz problems ﻿

(Communications in Computational Physics, 2012-12-31)
A new solution methodology is proposed for solving efficiently Helmholtz problems. The proposed method falls in the category of the discontinuous Galerkin methods. However, unlike the existing solution methodologies, this ...
• #### A multilayer method for the hydrostatic Navier-Stokes equations: A particular weak solution ﻿

(Journal of Scientific Computing, 2014-12-31)
In this work we present a multilayer approach to the solution of non-stationary 3D Navier-Stokes equations. We use piecewise smooth weak solutions. We approximate the velocity by a piecewise constant (in z) horizontal ...