Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Hoàng Việt Hà"'
Autor:
Pham, Quang Huy, Hoang, Viet Ha
We study the Electrical Impedance Tomography Bayesian inverse problem for recovering the conductivity given noisy measurements of the voltage on some boundary surface electrodes. The uncertain conductivity depends linearly on a countable number of un
Externí odkaz:
http://arxiv.org/abs/2306.08557
Autor:
Stein, Andreas, Hoang, Viet Ha
We propose a multilevel Monte Carlo-FEM algorithm to solve elliptic Bayesian inverse problems with "Besov random tree prior". These priors are given by a wavelet series with stochastic coefficients, and certain terms in the expansion vanishing at ran
Externí odkaz:
http://arxiv.org/abs/2302.00678
Autor:
Pang, Chen Hui, Hoang, Viet Ha
Publikováno v:
In Computers and Mathematics with Applications 1 February 2025 179:17-40
We develop an essentially optimal finite element approach for solving ergodic stochastic two-scale elliptic equations whose two-scale coefficient may depend also on the slow variable. We solve the limiting stochastic two-scale homogenized equation ob
Externí odkaz:
http://arxiv.org/abs/2201.04780
Autor:
Yeo, Zhan Fei, Hoang, Viet Ha
We study the Bayesian inverse problem for inferring the log-normal slowness function of the eikonal equation given noisy observation data on its solution at a set of spatial points. We study approximation of the posterior probability measure by solvi
Externí odkaz:
http://arxiv.org/abs/2111.11087
Autor:
Park, Jun Sur Richard, Hoang, Viet Ha
We study homogenization of a locally periodic two-scale dual-continuum system where each continuum interacts with the other. Equations for each continuum are written separately with interaction terms (exchange terms) added. The homogenization limit d
Externí odkaz:
http://arxiv.org/abs/1910.07098
Publikováno v:
Journal of Computational and Applied Mathematics Volume 374, 15 August 2020, 112782
We consider in this paper a challenging problem of simulating fluid flows, in complex multiscale media possessing multi-continuum background. As an effort to handle this obstacle, model reduction is employed. In \cite{rh2}, homogenization was nicely
Externí odkaz:
http://arxiv.org/abs/1909.04722
Autor:
Park, Jun Sur Richard, Hoang, Viet Ha
Simulation in media with multiple continua where each continuum interacts with every other is often challenging due to multiple scales and high contrast. One needs some types of model reduction. One of the approaches is multi-continuum technique, whe
Externí odkaz:
http://arxiv.org/abs/1906.04635
Autor:
Hoang, Viet Ha, Quek, Jia Hao
We consider the Bayesian inverse homogenization problem of recovering the locally periodic two scale coefficient of a two scale elliptic equation, given limited noisy information on the solution. We consider both the uniform and the Gaussian prior pr
Externí odkaz:
http://arxiv.org/abs/1807.06258
Autor:
Chu, Van Tiep, Hoang, Viet Ha
We develop an essentially optimal numerical method for solving multiscale Maxwell wave equations in a domain $D\subset{\mathbb R}^d$. The problems depend on $n+1$ scales: one macroscopic scale and $n$ microscopic scales. Solving the macroscopic multi
Externí odkaz:
http://arxiv.org/abs/1708.01966