Now showing items 49-68 of 220

• #### Continuous adjoint approach for the spalart-allmaras model in aerodynamic optimization ﻿

(2012-12-31)
In this paper, the continuous adjoint method to compute shape sensitivities in aerodynamic design with turbulence modeling is described and developed. The focus is on compressible flows described by the Reynolds-averaged ...
• #### Control and stabilization of waves on 1-d networks ﻿

(2013-12-31)
We present some recent results on control and stabilization of waves on 1-d networks.The fine time-evolution of solutions of wave equations on networks and, consequently, their control theoretical properties, depend in a ...
• #### Control of 2D scalar conservation laws in the presence of shocks ﻿

(2016-01-01)
We analyze a model optimal control problem for a 2D scalar conservation law-the so-called inverse design problem-with the goal being to identify the initial datum leading to a given final time configuration. The presence ...
• #### Control of a hysteresis model subject to random failures ﻿

(2015-12-31)
The note presents conditions to assure weak stability in the mean for a hysteresis Bouc-Wen model controlled by a proportional-integral controller subject to random failures. When a failure happens, the controller turns ...
• #### Control of temperature to suppress the population of Rhyzopertha dominica (F.) (Coleoptera, Bostrichidae) in a grain silo prototype ﻿

(2013-12-31)
This note presents some results from laboratory experiments that were conducted to characterize the influence of temperature in the mortality of adults of the insect known as lesser grain borer, Rhyzopertha dominica (F.). ...
• #### Control of underwater vehicles in inviscid fluids: I. Irrotational flows ﻿

(2014-12-31)
In this paper, we investigate the controllability of an underwater vehicle immersed in an infinite volume of an inviscid fluid whose flow is assumed to be irrotational. Taking as control input the flow of the fluid through ...
• #### Controllability of fast diffusion coupled parabolic systems ﻿

(2014-12-31)
In this work we are concerned with the null controllability of coupled parabolic systems depending on a parameter and converging to a parabolic-elliptic system. We show the uniform null controllability of the family of ...
• #### Convergence of a two-grid algorithm for the control of the wave equation ﻿

(2009-12-31)
We analyze the problem of boundary observability of the finite-difference space semidiscretizations of the 2-d wave equation in the square.We prove the uniform (with respect to the meshsize) boundary observability for the ...
• #### Convergence rates for dispersive approximation schemes to nonlinear Schrödinger equations ﻿

(2012-12-31)
This article is devoted to the analysis of the convergence rates of several numerical approximation schemes for linear and nonlinear Schrödinger equations on the real line. Recently, the authors have introduced viscous and ...
• #### Convergence to equilibrium of a linearized quantum Boltzmann equation for bosons at very low temperature ﻿

(2015-09-01)
We consider an approximation of the linearised equation of the homogeneous Boltzmann equation that describes the distribution of quasipar-ticles in a dilute gas of bosons at low temperature. The corresponding collision ...
• #### Convergence to equilibrium of some kinetic models ﻿

(2013-12-31)
We introduce in this paper a new constructive approach to the problem of the convergence to equilibrium for a large class of kinetic equations. The idea of the approach is to prove a 'weak' coercive estimate, which implies ...
• #### Counter-examples of regularity behavior for σ-evolution equations ﻿

(2011-12-31)
In this paper, we mainly discuss the infinite loss of regularity and μ-loss for a σ-evolution type model with oscillating in time coefficients. On the one hand, an explicit counter-example has been constructed in the ...
• #### Counterexample of loss of regularity for fractional order evolution equations with both degenerating and oscillating coefficients ﻿

(2014-12-31)
For weak evolution models of fractional order with singularity near the origin, the joint influence from the principal œÉ-Laplacian operator, degenerating part and oscillating part is of prime concern in the discussion of ...
• #### Critical points and symmetries of a free energy function for biaxial nematic liquid crystals ﻿

(2015-12-31)
We describe a general mean field model for the free energy function for a homogeneous medium of mutually interacting molecules, based on the formalism for a biaxial nematic liquid crystal set out by Katriel et al (1986) ...
• #### Derivation of a homogenized nonlinear plate theory from 3d elasticity ﻿

(2014-12-31)
We derive, via simultaneous homogenization and dimension reduction, the (Formula presented.)-limit for thin elastic plates whose energy density oscillates on a scale that is either comparable to, or much smaller than, the ...
• #### Derivation of a homogenized von-Kármán plate theory from 3D nonlinear elasticity ﻿

(2013-12-31)
We rigorously derive a homogenized von-Kármán plate theory as a Γ-limit from nonlinear three-dimensional elasticity by combining homogenization and dimension reduction. Our starting point is an energy functional that ...
• #### Derivation of a homogenized von-Kármán shell theory from 3D elasticity ﻿

(2014-12-31)
We derive homogenized von Kármán shell theories starting from three dimensional nonlinear elasticity. The original three dimensional model contains two small parameters: the period of oscillation $\epsilon$ of the material ...
• #### A direct algorithm in some free boundary problems ﻿

(2016-06-28)
In this paper we propose a new algorithm for the well known elliptic obstacle problem and for parabolic variational inequalities like one and two phase Stefan problem and of obstacle type. Our approach enters the category ...
• #### Dispersion for 1-d Schrödinger and wave equations with bv coefficients ﻿

(2016-01-01)
In this paper we analyze the dispersion for one dimensional wave and Schrödinger equations with BV coefficients. In the case of the wave equation we give a complete answer in terms of the variation of the logarithm of the ...
• #### Dispersion for the Schrödinger equation on networks ﻿

(2011-12-31)
In this paper, we consider the Schrödinger equation on a network formed by a tree with the last generation of edges formed by infinite strips. We give an explicit description of the solution of the linear Schrödinger ...