Results 31 to 40 of about 253 (176)

Optical vortices in dispersive nonlinear Kerr‐type media

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 18, Page 949-967, 2004., 2004
The applied method of slowly varying amplitudes gives us the possibility to reduce the nonlinear vector integrodifferential wave equation of the electrical and magnetic vector fields to the amplitude vector nonlinear differential equations. Using this approximation, different orders of dispersion of the linear and nonlinear susceptibility can be ...
Lubomir M. Kovachev
wiley   +1 more source

Joint location and pricing within a user-optimized environment

open access: yesEURO Journal on Computational Optimization, 2020
In the design of service facilities, whenever the behaviour of customers is impacted by queueing or congestion, the resulting equilibrium cannot be ignored by a firm that strives to maximize revenue within a competitive environment.
Teodora Dan   +2 more
doaj   +1 more source

A remark on a complementarity problem in Banach space

open access: yesInternational Journal of Stochastic Analysis, Volume 2004, Issue 3, Page 283-285, 2004., 2004
We give a modified proof of the theorem given in an earlier paper of the author (1994).
Sudarsan Nanda
wiley   +1 more source

Numerical construction of structured matrices with given eigenvalues

open access: yesSpecial Matrices, 2019
We consider a structured inverse eigenvalue problem in which the eigenvalues of a real symmetric matrix are specified and selected entries may be constrained to take specific numerical values or to be nonzero.
Sutton Brian D.
doaj   +1 more source

Hemiequilibrium problems

open access: yesInternational Journal of Stochastic Analysis, Volume 2004, Issue 3, Page 235-244, 2004., 2004
We consider a new class of equilibrium problems, known as hemiequilibrium problems. Using the auxiliary principle technique, we suggest and analyze a class of iterative algorithms for solving hemiequilibrium problems, the convergence of which requires either pseudomonotonicity or partially relaxed strong monotonicity. As a special case, we obtain a new
Muhammad Aslam Noor
wiley   +1 more source

A modification of the αBB method for box-constrained optimization and an application to inverse kinematics

open access: yesEURO Journal on Computational Optimization, 2016
For many practical applications it is important to determine not only a numerical approximation of one but a representation of the whole set of globally optimal solutions of a non-convex optimization problem.
Gabriele Eichfelder   +2 more
doaj   +1 more source

An economic order quantity model with reverse logistics program

open access: yesOperations Research Perspectives, 2020
The economic order quantity (EOQ) model has evolved greatly over past decades on the strength of incorporating realistic factors. In recent times, interest has been geared towards studying the effect of reverse flow of products into inventory system.
S. Sanni, Z. Jovanoski, H.S. Sidhu
doaj   +1 more source

Polynomial algorithms for projecting a point onto a region defined by a linear constraint and box constraints in ℝn

open access: yesJournal of Applied Mathematics, Volume 2004, Issue 5, Page 409-431, 2004., 2004
We consider the problem of projecting a point onto a region defined by a linear equality or inequality constraint and two‐sided bounds on the variables. Such problems are interesting because they arise in various practical problems and as subproblems of gradient‐type methods for constrained optimization.
Stefan M. Stefanov
wiley   +1 more source

An inertial forward–backward algorithm for the minimization of the sum of two nonconvex functions

open access: yesEURO Journal on Computational Optimization, 2016
We propose a forward–backward proximal-type algorithm with inertial/memory effects for minimizing the sum of a nonsmooth function with a smooth one in the nonconvex setting.
Radu Ioan Boţ   +2 more
doaj   +1 more source

Existence of solutions of minimization problems with an increasing cost function and porosity

open access: yesAbstract and Applied Analysis, Volume 2003, Issue 11, Page 651-670, 2003., 2003
We consider the minimization problem f(x) → min, x ∈ K, where K is a closed subset of an ordered Banach space X and f belongs to a space of increasing lower semicontinuous functions on K. In our previous work, we showed that the complement of the set of all functions f, for which the corresponding minimization problem has a solution, is of the first ...
Alexander J. Zaslavski
wiley   +1 more source

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