Results 41 to 50 of about 217,424 (259)

A new constructing auxiliary function method for global optimization

open access: yesMathematical and Computer Modelling, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wang, Yong-Jun, Zhang, Jiang-She
openaire   +2 more sources

Spatial prediction of soil electrical conductivity using soil axillary data, soft data derived from general linear model and error measurement [PDF]

open access: yesDesert, 2020
Indirect measurement of soil electrical conductivity (EC) has become a major data source in spatial/temporal monitoring of soil salinity. However, in many cases, the weak correlation between direct and indirect measurement of EC has reduced the accuracy ...
N. Hamzehpour, M. Rahmati, B. Roohzad
doaj   +1 more source

A new auxiliary function method for general constrained global optimization

open access: yesOptimization, 2013
In this article, we first propose a method to obtain an approximate feasible point for general constrained global optimization problems (with both inequality and equality constraints). Then we propose an auxiliary function method to obtain a global minimizer or an approximate global minimizer with a required precision for general global optimization ...
Z.Y. Wu   +3 more
openaire   +2 more sources

On optimal solution error covariances in variational data assimilation problems [PDF]

open access: yes, 2010
The problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem to find unknown parameters such as distributed model coefficients or boundary conditions. The equation for the optimal solution error
(Funder), Scottish Founding Council via GRPE   +3 more
core   +3 more sources

Solving nonlinearly constrained global optimization problem via an auxiliary function method

open access: yesJournal of Computational and Applied Mathematics, 2009
Constrained continuous global minimization problems can be converted to unconstrained ones by adding a penalty term to the objective function. Penalty function methods require usually the determination of parameters, so that constrained and unconstrained problems have global minimizers.
Zhu, Wenxing, Ali, M.M.
openaire   +1 more source

Optimal auxiliary function method for analyzing nonlinear system of coupled Schrödinger–KdV equation with Caputo operator

open access: yesOpen Physics, 2023
Abstract The optimal auxiliary function method (OAFM) is introduced and used in the analysis of a nonlinear system containing coupled Schrödinger–KdV equations, all within the framework of the Caputo operator. The OAFM, known for its efficiency in solving nonlinear issues, is used to obtain approximate solutions for the coupled equations’
Alshehry Azzh Saad   +4 more
openaire   +2 more sources

Multilevel Preconditioning of Discontinuous-Galerkin Spectral Element Methods, Part I: Geometrically Conforming Meshes [PDF]

open access: yes, 2013
This paper is concerned with the design, analysis and implementation of preconditioning concepts for spectral Discontinuous Galerkin discretizations of elliptic boundary value problems.
C. Canuto   +4 more
core   +2 more sources

Extension of optimal auxiliary function method to non-linear fifth order lax and Swada-Kotera problem

open access: yesAlexandria Engineering Journal, 2023
In this article, a semi-analytical approach known as the optimal auxiliary function method is extended to the approximate solution of non-linear partial differential equations. The fifth order lax and swada-kotera equations are taken as test examples. Utilizing the well-known least squares method, the optimal convergence control parameter values in the
Rashid Nawaz   +5 more
openaire   +2 more sources

A bi-level programming approach for trip matrix estimation and traffic control problems with stochastic user equilibrium link flows [PDF]

open access: yes, 2001
This paper deals with two mathematically similar problems in transport network analysis: trip matrix estimation and traffic signal optimisation on congested road networks. These two problems are formulated as bi-level programming problems with stochastic
Bard   +21 more
core   +1 more source

Exploring the impact of different cost heuristics in the allocation of safety integrity levels [PDF]

open access: yes, 2014
Contemporary safety standards prescribe processes in which system safety requirements, captured early and expressed in the form of Safety Integrity Levels (SILs), are iteratively allocated to architectural elements.
Araújo, Rui Esteves   +6 more
core   +2 more sources

Home - About - Disclaimer - Privacy