Results 31 to 40 of about 7,825,197 (282)

A New Fractional-order Derivative-based Nonlinear Anisotropic Diffusion Model for Biomedical Imaging

open access: yesChaos Theory and Applications, 2023
Medical imaging, the process of visual representation of different organs and tissues of the human body, is employed for monitoring the normal as well as abnormal anatomy and physiology of the body. Imaging which can provide healthcare solutions ensuring
Yeliz Karaca   +2 more
doaj   +1 more source

Path-Dependent Optimal Stochastic Control and Viscosity Solution of Associated Bellman Equations [PDF]

open access: yes, 2012
In this paper we study the optimal stochastic control problem for a path-dependent stochastic system under a recursive path-dependent cost functional, whose associated Bellman equation from dynamic programming principle is a path-dependent fully ...
Shanjian Tang, Fu Zhang
semanticscholar   +1 more source

On Zero-Sum Stochastic Differential Games with Jump-Diffusion Driven State: A Viscosity Solution Framework [PDF]

open access: yesSIAM Journal of Control and Optimization, 2010
A zero-sum differential game with controlled jump-diffusion driven state is considered and studied by a combination of dynamic programming and viscosity solution techniques. We prove, under certain conditions, that the value of the game exists. Moreover,
Imran H. Biswas
semanticscholar   +1 more source

Approximate solutions of the Riemann problem for a two-phase flow of immiscible liquids based on the Buckley–Leverett model [PDF]

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2022
The article proposes an approximate method based on the "vanishing viscosity" method, which ensures the smoothness of the solution without taking into account the capillary pressure.
Y.S. Aldanov   +2 more
doaj   +3 more sources

The vanishing viscosity limit for Hamilton-Jacobi equations on Networks [PDF]

open access: yes, 2012
For a Hamilton-Jacobi equation defined on a network, we introduce its vanishing viscosity approximation. The elliptic equation is given on the edges and coupled with Kirchhoff-type conditions at the transition vertices. We prove that there exists exactly
Camilli, Fabio   +2 more
core   +2 more sources

Deterministic minimax impulse control in finite horizon: the viscosity solution approach [PDF]

open access: yes, 2010
We study here the impulse control minimax problem. We allow the cost functionals and dynamics to be unbounded and hence the value functions can possibly be unbounded. We prove that the value function of the problem is continuous.
B. E. Asri
semanticscholar   +1 more source

Generalized Liouville theorem for viscosity solutions to a singular Monge-Ampère equation

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we study the asymptotic behaviour at infinity for viscosity solutions to a singular Monge-Ampère equation in half space from affine geometry.
Jian Huaiyu, Wang Xianduo
doaj   +1 more source

An approximation scheme for an Eikonal Equation with discontinuous coefficient [PDF]

open access: yes, 2013
We consider the stationary Hamilton-Jacobi equation where the dynamics can vanish at some points, the cost function is strictly positive and is allowed to be discontinuous. More precisely, we consider special class of discontinuities for which the notion
Adriano Festa   +4 more
core   +3 more sources

Viscosity Control of Protein Solution by Small Solutes: A Review

open access: yesCurrent protein and peptide science, 2017
Viscosity of protein solution is one of the most troublesome issues for the high-concentration formulation of protein drugs. In this review, we summarize the practical methods that suppress the viscosi-ty of protein solution using small molecular ...
Taehun Hong, Kazuki Iwashita, K. Shiraki
semanticscholar   +1 more source

Optimal control problems on stratified domains

open access: yesNetworks and Heterogeneous Media, 2007
We consider a class of optimal control problems defined on a stratified domain. Namely, we assume that the statespace $\mathbb{R}^N$ admits a stratification as a disjoint union of finitely many embedded submanifolds $\mathcal{M}_i$.
Alberto Bressan, Yunho Hong
doaj   +1 more source

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