Listar MA - Artículos por título
Mostrando ítems 16-35 de 67
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Chains in evolution algebras
(ELSEVIER, 2021-08-01)In this work we approach three-dimensional evolution algebras from certain constructions performed on two-dimensional algebras. More precisely, we provide four different constructions producing three-dimensional evolution ... -
Comparing and Tuning Machine Learning Algorithms to Predict Type 2 Diabetes Mellitus
(Elsevier, 2023)The main goals of this work are to study and compare machine learning algorithms to predict the development of type 2 diabetes mellitus. Four classification algorithms have been considered, studying and comparing the ... -
Conformal Vector Fields and Null Hypersurfaces
(Springer, 2022-05-03)We give conditions for a conformal vector field to be tangent to a null hypersurface. We particularize to two important cases: a Killing vector field and a closed and conformal vector field. In the first case, we obtain a ... -
Connecting ideals in evolution algebras with hereditary subsets of its associated graph
(2023)In this article, we introduce a relation including ideals of an evo-lution algebra and hereditary subsets of vertices of its associated graph andestablish some properties among them. This relation allows us to determinemaximal ... -
Cost-driven screening of network constraints for the unit commitment problem
(The Institute of Electrical and Electronics Engineers (IEEE), 2022-03-16)In an attempt to speed up the solution of the unit commitment (UC) problem, both machine-learning and optimization-based methods have been proposed to lighten the full UC formulation by removing as many superfluous line-flow ... -
Derivations and loops of some evolution algebras
(Springer, 2023)In this work we study the space of derivations of non-degenerate evolution algebras. We improve some results obtained recently in the literature and, as a consequence, we advance in the description of the derivations for ... -
Distributionally Robust Optimal Power Flow with Contextual Information
(Elsevier B. V., 2022-10)In this paper, we develop a distributionally robust chance-constrained formulation of the Optimal Power Flow problem (OPF) whereby the system operator can leverage contextual information. For this purpose, we exploit an ... -
Distributionally robust stochastic programs with side information based on trimmings
(Springer, 2021-11)We consider stochastic programs conditional on some covariate information, where the only knowledge of the possible relationship between the uncertain parameters and the covariates is reduced to a finite data sample of ... -
Electricity Cost-Sharing in Energy Communities Under Dynamic Pricing and Uncertainty
(IEEE, 2021-02-15)Most of the prosumers nowadays are constrained to trade only with the supplier under a flat tariff or dynamic time-of-use price signals. This paper models and discusses the cost-saving benefits of flexible prosumers as ... -
Feature-driven improvement of renewable energy forecasting and trading
(2020-02-26)Inspired from recent insights into the common ground of machine learning, optimization and decision-making, this paper proposes an easy-to-implement, but effective procedure to enhance both the quality of renewable energy ... -
Fuzzy algebras of concepts
(MDPI, 2023-03-26)Preconcepts are basic units of knowledge that form the basis of formal concepts in formal concept analysis (FCA). This paper investigates the relations among different kinds of preconcepts, such as protoconcepts, meet and ... -
Fuzzy closure relations
(Elsevier, 2022-05-25)The concept of closure operator is key in several branches of mathematics. In this paper, closure operators are extended to relational structures, more specifically to fuzzy relations in the framework of complete fuzzy ... -
Fuzzy closure structures as formal concepts
(Elsevier, 2022-12-28)Galois connections seem to be ubiquitous in mathematics. They have been used to model solutions for both pure and application-oriented problems. Throughout the paper, the general framework is a complete fuzzy lattice over ... -
Fuzzy Closure Structures as Formal Concepts II
(Elsevier, 2023-09-24)This paper is the natural extension of Fuzzy Closure Structures as Formal Concepts. In this paper we take into consideration the concept of closure system which is not dealt with in the previous one. Hence, a connection must ... -
Fuzzy closure systems: Motivation, definition and properties
(Elsevier, 2022-09)The aim of this paper is to extend closure systems from being crisp sets with certain fuzzy properties to proper fuzzy sets. The presentation of the paper shows a thorough discussion on the different alternatives that ... -
Fuzzy relational Galois connections between fuzzy transitive digraphs
(Elsevier, 2022-12-28)We present a fuzzy version of the notion of relational Galois connection between fuzzy transitive directed graphs (fuzzy T-digraphs) on the specific setting in which the underlying algebra of truth values is a complete ... -
Hankel matrices acting on the Hardy space H1 and on Dirichlet spaces.
(Springer, 2018-12-03)If μ is a positive Borel measure on the interval [0, 1) we let H_μ be the Hankel matrix H_μ={ μ_{n,k} }_{n,k} with entries μ_{n,k} =μ_{n+k} where μ_n denotes the moment of order n of μ. This matrix induces formally an ... -
Inner Ideals of Real Simple Lie Algebras
(Springer, 2022-07-18)A classification up to automorphism of the inner ideals of the real finite-dimensional simple Lie algebras is given, jointly with precise descriptions in the case of the exceptional Lie algebras. -
Inverse optimization with kernel regression: Application to the power forecasting and bidding of a fleet of electric vehicles
(Elsevier, 2021-10)This paper considers an aggregator of Electric Vehicles (EVs) who aims to learn the aggregate power of his/her fleet while also participating in the electricity market. The proposed approach is based on a data-driven inverse ... -
Kitainik axioms do not characterize the class of inclusion measures based on contrapositive fuzzy implications
(Elsevier, 2022-05-17)In this short communication, we refute the conjecture by Fodor and Yager from [5] that the class of inclusion measures proposed by Kitainik coincides with that of inclusion measures based on contrapositive fuzzy implications. ...