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Mostrando ítems 11-20 de 130
Artículo
On sparse optimal regression trees
(Elsevier, 2021-12-18)
In this paper, we model an optimal regression tree through a continuous optimization problem, where a compromise between prediction accuracy and both types of sparsity, namely local and global, is sought. Our approach can ...
Artículo
Solving nonconvex planar location problems by nite dominating sets
(Springer, 2000-10)
It is well-known that some of the classical location problems with polyhedral gauges can be solved in polynomial time by nding a fi nite dominating set, i.e. a finite set of candidates guaranteed to contain at least one ...
Artículo
Pareto-Optimality in Linear Regression
(Academic Press Inc. Elsevier Science, 2002-05-25)
In this paper the linear regression problem is studied in the context of vector optimization theory. The set of Pareto-optimal solutions is represented as the set of optimal solutions to certain optimization problems, and ...
Artículo
A global optimisation approach for parameter estimation of a mixture of double Pareto lognormal and lognormal distributions
(PERGAMON-ELSEVIER SCIENCE LTD, 2013-10-30)
The double Pareto Lognormal(dPlN) statistical distribution, defined interms of both an exponentiated skewed Laplace distribution and alog normal distribution, has proven suitable for fitting heavy tailed data. In this ...
Artículo
The determination of a "least quantile of squares regression line" for all quantiles
(Elsevier Science, 1994-09-01)
Least median of squares regression has shown to be an extremely useful tool in robust regression analysis. In this note, we extend this concept to least quantile of squares regression, and propose a polynomial algorithm ...
Artículo
A discretizing algorithm for location problems
(ELSEVIER SCIENCE BV, 1995)
A new and simple methodology is proposed to solve both constrained and unconstrained planar continuous single-facility location problems. As particular instances, the classical location problems with mixed gauges can be ...
Artículo
An exact global optimization method for deriving weights from pairwise comparison matrices
(Springer, 2006-09-06)
Some multiple-criteria decision making methods rank actions by associating weights to the different criteria or actions, which are pairwise compared via a positive reciprocal matrix A. There is a vast literature on proposals ...
Artículo
A fractional model for locating semi-desirable facilities on networks
(ELSEVIER SCIENCE BV, 2002-01-01)
In this paper, we address the problem of locating a series of facilities on a network maximizing the average distance to population centers (assumed to be distributed in the plane) per unit transportation cost (a function ...
Artículo
Minmax-distance approximation and separation problems: geometrical properties
(Springer, 2010-04-01)
A center hyperplane in the d-dimensional space minimizes the maximum of its distances from a finite set of points A with respect to possibly different gauges. In this note it is shown that a center hyperplane exists which ...
Artículo
Locating an undesirable facility by generalized cutting planes
(Informs, 1998-08-03)
We address the problem of locating an undesirable facility within a compact set by minimizing a strictly decreasing boundedly lower subdifferentiable function of the squared Euclidean distances to a set of fixed points. ...