Results 31 to 40 of about 2,015,900 (233)

An Algorithm for Unconstrained Quadratically Penalized Convex Optimization [PDF]

open access: yesCommunications in Statistics - Simulation and Computation, 2011
A descent algorithm, "Quasi-Quadratic Minimization with Memory" (QQMM), is proposed for unconstrained minimization of the sum, $F$, of a non-negative convex function, $V$, and a quadratic form. Such problems come up in regularized estimation in machine learning and statistics. In addition to values of $F$, QQMM requires the (sub)gradient of $V$.
openaire   +3 more sources

Robust optimisation of unconstrained binary quadratic problems

open access: yesInternational Journal of Operational Research, 2019
In this paper we focus on the unconstrained binary quadratic optimization model, maximize x^t Qx, x binary, and consider the problem of identifying optimal solutions that are robust with respect to perturbations in the Q matrix.. We are motivated to find robust, or stable, solutions because of the uncertainty inherent in the big data origins of Q and ...
Mark W. Lewis   +2 more
openaire   +3 more sources

A Multilevel Algorithm for Large Unconstrained Binary Quadratic Optimization [PDF]

open access: yes, 2012
The unconstrained binary quadratic programming (UBQP) problem is a general NP-hard problem with various applications. In this paper, we present a multilevel algorithm designed to approximate large UBQP instances. The proposed multilevel algorithm is composed of a backbone-based coarsening phase, an asymmetric uncoarsening phase and a memetic refinement
Yang Wang 0030   +3 more
openaire   +3 more sources

A novel hybrid backtracking search optimization algorithm for continuous function optimization [PDF]

open access: yesDecision Science Letters, 2019
Stochastic optimization algorithm provides a robust and efficient approach for solving complex real world problems. Backtracking Search Optimization Algorithm (BSA) is a new stochastic evolutionary algorithm and the aim of this paper is to introduce a ...
Sukanta Nama, Apu Kumar Saha
doaj   +1 more source

Quantum Algorithms for Mixed Binary Optimization Applied to Transaction Settlement

open access: yesIEEE Transactions on Quantum Engineering, 2021
In this article, we extend variational quantum optimization algorithms for quadratic unconstrained binary optimization problems to the class of mixed binary optimization problems.
Lee Braine   +3 more
doaj   +1 more source

Approach to development of algorithms of Newtonian methods of unconstrained optimization, their software implementation and benchmarking [PDF]

open access: yesКомпьютерные исследования и моделирование, 2013
The approach to increase efficiency of Gill and Murray's algorithm of Newtonian methods of unconstrained optimization with step adjustment creation is offered, rests on Choleskys factorization.
Gennadiy Anatolievich Zelenkov   +1 more
doaj   +1 more source

Exploiting Hardware and Software Advances for Quadratic Models of Wind Farm Layout Optimization

open access: yesIEEE Access, 2022
A key aspect of the design of a wind farm is the wind farm layout optimization (WFLO) problem: given a wind farm site and information about the wind patterns, the problem is to decide the location of individual wind turbines to maximize energy production
Arik Senderovich   +3 more
doaj   +1 more source

Practical Implementation of Unconstrained Optimization Methods Tested on Quadratic Functions [PDF]

open access: yes, 2017
In this work we give a detailed look to the Practical implementation of unconstrained optimization tested on quadratic functions. Section (1) speak about the theory of optimization problems, introduce definitions and theorems of linear programming ...
El Siddieg, Awatif M. A.
core   +1 more source

Physics-Inspired Optimization for Quadratic Unconstrained Problems Using a Digital Annealer

open access: yesFrontiers in Physics, 2019
The Fujitsu Digital Annealer is designed to solve fully connected quadratic unconstrained binary optimization (QUBO) problems. It is implemented on application-specific CMOS hardware and currently solves problems of up to 1,024 variables.
Maliheh Aramon   +7 more
doaj   +1 more source

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