Results 31 to 40 of about 701,176 (312)

Measurement error in time-series analysis: a simulation study comparing modelled and monitored data. [PDF]

, 2013
BACKGROUND: Assessing health effects from background exposure to air pollution is often hampered by the sparseness of pollution monitoring networks. However, regional atmospheric chemistry-transport models (CTMs) can provide pollution data with national ...
Richard W Atkinson, Doherty, Ruth M., Butland, BK, Massimo Vieno, Ruth M Doherty, Doherty, Ruth M, Ben Armstrong, Doherty, RM, Heal, Mathew R, Heal, MR, Paul Wilkinson, Vieno, Massimo, Armstrong, Ben, Atkinson, Richard W., Heal, Mathew R., Vieno, M, Mathew R Heal, Butland, Barbara K, Wilkinson, Paul, Armstrong, B, Atkinson, RW, Atkinson, Richard W, Butland, Barbara K., Barbara K Butland, Wilkinson, P, Heal, Mathew R; id_orcid   +25 more
core   +1 more source

Cluster robust error estimates for the Rayleigh–Ritz approximation I: Estimates for invariant subspaces

, 2006
This is the first part of a paper that deals with error estimates for the Rayleigh–Ritz approximations to the spectrum and invariant subspaces of a bounded Hermitian operator in a Hilbert or Euclidean space.
Ovtchinnikov, E.
core   +1 more source

A priori error estimates for optimal control problems with pointwise constraints on the gradient of the state [PDF]

, 2011
We analyze a finite element approximation of an elliptic optimal control problem with pointwise bounds on the gradient of the state variable. We derive convergence rates if the control space is discretized implicitly by the state equation. In contrast to
Ortner, Christoph, W. Wollner, Wollner, Winnifried, C. Ortner, Wollner, W.   +4 more
core   +1 more source

Quantum Calculus-Based Error Estimations in Hermite-Hadamard Type Inequalities [PDF]

Sahand Communications in Mathematical Analysis
The main aim of this article is to present error approximations for Hermite-Hadamard inequalities, which are connected with $_{\omega_{1}}\mathfrak{q}$-fractional calculus operators and are based on $\mathrm{(\rho, m)}$-convex functions.
Muhammad Samraiz, Kanwal Saeed, Gauhar Rahman, Saima Naheed   +3 more
doaj   +1 more source

A Comparative Study on the Estimation of the Parameters of the Markovian Processes- II [PDF]

The Egyptian Statistical Journal, 1983
Consider the stationary autoregressive process with order one and non-zero mean. The weight parameter is taken to be priori distributed as uniform, standard normal and normal with zero mean. The Bayes' estimates are obtained and compared with conditional
A.A. Abd-Alla, A.M. Abouammoh
doaj   +1 more source

Numerical validation of probabilistic laws to evaluate finite element error estimates

Mathematical Modelling and Analysis, 2021
We propose a numerical validation of a probabilistic approach applied to estimate the relative accuracy between two Lagrange finite elements Pk and Pm,(k < m).
Jöel Chaskalovic, Franck Assous
doaj   +1 more source

On improved P1-interpolation error estimates in W1,p(0, 1): application to the finite element method

Mathematical Modelling and Analysis
Based on a new Taylor-like formula, we derived an improved interpolation error estimate in W1,p. We compare it with the classical error estimates based on the standard Taylor formula, and also with the corresponding interpolation error estimate, derived
Joel Chaskalovic, Franck Assous
doaj   +1 more source

Perona‐Malik equation ‐ error estimates for explicit finite volume scheme

Mathematical Modelling and Analysis, 2005
Error estimates in the L2 norm for the explicit fully discrete numerical finite volume scheme are derived and proved for Perona‐Malik equation. Numerical example is also presented.
A. Handlovičová, Z. Krivá
doaj   +1 more source

Reliable Eigenspace Error Estimation Using Source Error Estimators

Computational Methods in Applied Mathematics
Abstract We introduce a framework for repurposing error estimators for source problems to compute an estimator for the gap between eigenspaces and their discretizations. Of interest are eigenspaces of finite clusters of eigenvalues of unbounded nonselfadjoint linear operators with compact resolvent.
Jay Gopalakrishnan, Gabriel Pinochet-Soto   +1 more
openaire   +2 more sources

Quantum solutions of a nonlinear Schrödinger equation [PDF]

Iranian Journal of Numerical Analysis and Optimization
In the present paper, we precisely conduct a quantum calculus method for the numerical solutions of PDEs. A nonlinear Schrödinger equation is considered. Instead of the known classical discretization methods based on the finite difference scheme, Adomian
S. Arfaoui, Ben Mabrouk
doaj   +1 more source