Results 31 to 40 of about 11,295 (169)

Inverse Source Problem for Sobolev Equation with Fractional Laplacian

Journal of Function Spaces, 2022
In this paper, we are interested in the problem of determining the source function for the Sobolev equation with fractional Laplacian. This problem is ill-posed in the sense of Hadamard.
Nguyen Duc Phuong, Van Tien Nguyen, Le Dinh Long   +2 more
doaj   +1 more source

Adaptivní nepřesné newtonovy metody s a posteriorními zastavovacími kritérii [PDF]

ACC Journal, 2012
V této práci uvažujeme systémy nelineárních algebraických rovnic vznikající při numerické diskretizaci nelineárních parciálnich diferenciálních rovnic difúzního typu.
Alexandre Ern, Vohralík. Martin
doaj  

Reservoir Simulator Runtime Enhancement Based on a Posteriori Error Estimation Techniques

Oil & Gas Science and Technology, 2016
In this work, we show how the a posteriori error estimation techniques proposed in [Di Pietro et al. (2014) Computers & Mathematics with Applications 68, 2331-2347] can be efficiently employed to improve the performance of a compositional reservoir ...
Gratien Jean-Marc, Ricois Olivier, Yousef Soleiman   +2 more
doaj   +1 more source

Identification of source term for the ill-posed Rayleigh–Stokes problem by Tikhonov regularization method

Advances in Difference Equations, 2019
In this paper, we study an inverse source problem for the Rayleigh–Stokes problem for a generalized second-grade fluid with a fractional derivative model. The problem is severely ill-posed in the sense of Hadamard. To regularize the unstable solution, we
Tran Thanh Binh, Hemant Kumar Nashine, Le Dinh Long, Nguyen Hoang Luc, Can Nguyen   +4 more
doaj   +1 more source

State of charge estimation of li-ion batteries based on the noise-adaptive interacting multiple model

Energy Reports, 2021
This paper presents a type of noise-adaptive (NA) interacting multiple model (IMM) algorithm combined with an unscented Kalman filter (UKF) in order to address problems in poor filtering accuracy and filtering divergence of IMM caused by the statistical ...
Ce Huang, Xiaoyang Yu, Yongchao Wang, Yongqin Zhou, Ran Li   +4 more
doaj   +1 more source

Adaptive FEM and CIPFEM for a nonlinear Helmholtz equation with high wave number

European Journal of Applied Mathematics
A nonlinear Helmholtz (NLH) equation with high frequencies and corner singularities is discretized by the linear finite element method (FEM) and the continuous interior penalty finite element method (CIPFEM).
Run Jiang, Haijun Wu, Yifeng Xu, Jun Zou
doaj   +1 more source

A Posteriori Error Estimates for DDDAS Inference Problems

Procedia Computer Science, 2014
AbstractInference problems in dynamically data-driven application systems use physical measurements along with a physical model to estimate the parameters or state of a physical system. Errors in measurements and uncertainties in the model lead to inaccurate inference results. This work develops a methodology to estimate the impact of various errors on
Rao, V., Sandu, Adrian
openaire   +2 more sources

FPU-Supported Running Error Analysis

Acta Polytechnica, 2010
A-posteriori forward rounding error analyses tend to give sharper error estimates than a-priori ones, as they use actual data quantities. One of such a-posteriori analysis – running error analysis – uses expressions consisting of two parts; one generates
T. Zahradnický, R. Lórencz
doaj  

Bayesian Network Demand-Forecasting Model Based on Modified Particle Swarm Optimization

Applied Sciences, 2023
With the increasing variety of products, the increasing substitutability of products, and the trend of customized products, the volatility of market demand is increasing, which poses a challenge to make accurate demand forecasting. The Bayesian method is
Shebiao Hu, Kun Li
doaj   +1 more source

Neural functional a posteriori error estimates

CoRR
Under review for ICML2024, was reviewed at https://openreview.net/forum?id=z62Xc88jgF for ...
Vladimir Fanaskov, Alexander Rudikov, Ivan V. Oseledets   +2 more
openaire   +3 more sources