Results 21 to 30 of about 12,261,514 (349)

Using shifted Legendre orthonormal polynomials for solving fractional optimal control problems [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2022
‎‎shifted Legendre orthonormal polynomials (SLOPs) are used to approximate the numerical solutions of fractional optimal control problems‎. ‎To do so‎, ‎first‎, ‎the operational matrix of the Caputo fractional derivative‎, ‎the SLOPs‎, ‎and Lagrange ...
R. Naseri, A. Heydari, A.S. Bagherzadeh
doaj   +1 more source

Approximate Solutions of Multidimensional Wave Problems Using an Effective Approach

open access: yesJournal of Function Spaces, 2023
The main goal of this paper is to introduce a new scheme for the approximate solution of 1D, 2D, and 3D wave equations. The recurrence relation is very important to deal with the approximate solution of differential problems.
Muhammad Nadeem   +2 more
doaj   +1 more source

Comparing Different Approaches for Subtyping Children with Conduct Problems: Callous-Unemotional Traits Only Versus the Multidimensional Psychopathy Construct

open access: yesJournal of Psychopathology and Behavioral Assessment, 2018
The aim of this study was to compare two youth psychopathy models (i.e., callous-unemotional versus multidimensional model) in their ability to predict future and stable conduct problems (CP).
O. Colins   +3 more
semanticscholar   +1 more source

APPLICATION OF DARBOUX TRANSFORMATION TO MULTIDIMENSIONAL INHOMOGENEOUS PROBLEMS

open access: yesTASK Quarterly, 2016
General properties of ladder operators applied to inhomogeneous problems are studied in the context of their usefulness for solving practical problems with stress put on the possibility of embedding the interwine relation onto a wider class of operators.
GRZEGORZ KWIATKOWSKI
doaj   +1 more source

On Construction of Partially Dimension-Reduced Approximations for Nonstationary Nonlocal Problems of a Parabolic Type

open access: yesMathematics, 2023
The main aim of this article is to propose an adaptive method to solve multidimensional parabolic problems with fractional power elliptic operators.
Raimondas Čiegis   +3 more
doaj   +1 more source

Computational Methods for Multidimensional Neutron Diffusion Problems

open access: yesScience and Technology of Nuclear Installations, 2009
A neutronic module for the solution of two-dimensional steady-state multigroup diffusion problems in nuclear reactor cores is developed. The module can produce both direct fluxes as well as adjoints, that is, neutron importances.
Song Han, Sandra Dulla, Piero Ravetto
doaj   +1 more source

General Stieltjes moment problems for rapidly decreasing smooth functions [PDF]

open access: yes, 2017
We give (necessary and sufficient) conditions over a sequence $\left\{ f_{n}\right\} _{n=0}^{\infty}$ of functions under which every generalized Stieltjes moment problem \[ \int_{0}^{\infty} f_{n}(x)\phi(x)\mathrm{d} x=a_{n}, \ \ \ n\in\mathbb{N}, \] has
Estrada, Ricardo, Vindas, Jasson
core   +2 more sources

Well-posedness of the Dirichlet and Poincaré problems for one class of hyperbolic equations in a multidimensional domain

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
In early works the author studied the Dirichlet and Poincaré problems for multidimensional hyperbolic equations, which shows the well-posedness of these problems in cylindrical domains, significantly dependent on the height of the considered cylindrical ...
Serik A Aldashev
doaj   +1 more source

Flexible Wolf Pack Algorithm for Dynamic Multidimensional Knapsack Problems

open access: yesResearch, 2020
Optimization problems especially in a dynamic environment is a hot research area that has attracted notable attention in the past decades. It is clear from the dynamic optimization literatures that most of the efforts have been devoted to continuous ...
Husheng Wu, Renbin Xiao
doaj   +1 more source

On the Truncated Multidimensional Moment Problems in Cn

open access: yesAxioms, 2022
We consider the problem of finding a (non-negative) measure μ on B(Cn) such that ∫Cnzkdμ(z)=sk, ∀k∈K. Here, K is an arbitrary finite subset of Z+n, which contains (0,…,0), and sk are prescribed complex numbers (we use the usual notations for multi ...
Sergey Zagorodnyuk
doaj   +1 more source

Home - About - Disclaimer - Privacy