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Browsing by Author "Izquierdo Sebastián, Joaquín"

Now showing items 1-20 of 210

3D model evolution of a leak based on GPR image interpretations

Ocana-Levario, S.J.; Ayala Cabrera, David; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (IWA Publishing, 2015-12)

This paper presents some aspects of the time propagation of underground water leakage in controlled laboratory conditions using a drilled polyvinyl chloride (PVC) pipe and interpreting ground penetrating radar (GPR) images. ...
3D Representation of (Buried) Water Supply Elements using Pre-Processed GPR Images

Ayala Cabrera, David; Ocaña Levario, Silvia Janeth; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (2015)

[EN] In this paper, a ground penetrating radar (GPR) is used as a non-destructive method to assess the buried elements of water supply systems (WSSs). The aim is the detection of various pipe materials (such as plastic ...
A combined multi-criteria approach to support FMECA analyses: a real-world case

Carpitella, Silvia; Certa, A.; Izquierdo Sebastián, Joaquín; La Fata, C. M. (Elsevier, 2018)

[EN] The paper proposes an approach that combines reliability analyses and multi-criteria decision methods to optimize maintenance activities of complex systems. A failure mode, effects, and criticality analysts (FMECA) ...
A comparison of machine learning classifiers for leak detection and isolation in urban networks

Carreño-Alvarado, Elizabeth P.; Reynoso-Meza, Gilberto; Montalvo, Idel; Izquierdo Sebastián, Joaquín (International Center for Numerical Methods in Engineering (CIMNE), 2017-07-05)

[EN] Leak detection and isolation (LDI) is a problem of interest for water management companies and their technical staff. Main reasons for this are that early detection of leakages can reduce dramatically (1) water ...
A decision support system to assure high-performance maintenance service

Aiello, Giuseppe; Benítez López, Julio; Carpitella, Silvia; Certa, Antonella; Enea, Mario; Izquierdo Sebastián, Joaquín; La Cascia, Marco (Emerald, 2021-10-26)

[EN] Purpose This study aims to propose a decision support system (DSS) for maintenance management of a service system, namely, a street cleaning service vehicle. Referring to the information flow management, the blockchain ...
A Digital Twin of a Water Distribution System by Using Graph Convolutional Networks for Pump Speed-Based State Estimation

Bonilla, Carlos A.; Znafei, Ariele; Brentan, Bruno; Montalvo, Idel; Izquierdo Sebastián, Joaquín (MDPI AG, 2022-02)

[EN] Water distribution system monitoring is currently carried out using advanced real-time control technologies to achieve a higher operational efficiency. Data analysis techniques can be implemented for condition estimation, ...
A Flexible Methodology to Sectorize Water Supply Networks Based on Social Network Theory Concepts and on Multi-objective Optimization

Campbell-Gonzalez, Enrique; Izquierdo Sebastián, Joaquín; Montalvo Arango, Idel; Ilaya-Ayza, Amilkar Ernesto; Pérez García, Rafael; Tavera, Mario (IWA Publishing, 2016-01)

A novel methodology to sectorize water supply networks (WSNs) depending on a main transmission line is presented in this paper. The methodology is based on concepts derived from the social network theory and graph theory ...
A hybrid multicriteria approach to GPR image mining applied to water supply system maintenance

Carpitella, Silvia; Ocaña-Levario, Silvia Janeth; Benítez López, Julio; Certa, A.; Izquierdo Sebastián, Joaquín (Elsevier, 2018)

[EN] Data processing techniques for Ground Penetrating Radar (GPR) image mining provide essential information to optimize maintenance management of Water Supply Systems (WSSs). These techniques aim to elaborate on radargrams ...
A hybrid, auto-adaptive, and rule-based multi-agent approach using evolutionary algorithms for improved searching

Izquierdo Sebastián, Joaquín; Montalvo Arango, Idel; Campbell, E.; Pérez García, Rafael (Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2015-11-19)

Selecting the most appropriate heuristic for solving a specific problem is not easy, for many reasons. This article focuses on one of these reasons: traditionally, the solution search process has operated in a given manner ...
A multi-objective and multi-criteria approach for district metered area design: water operation and quality analysis

Brentan, Bruno; Carpitella, Silvia; Izquierdo Sebastián, Joaquín; Luvizotto Jr., Edevar; Meirelles, Gustavo (R. Company, J. C. Cortés, L. Jódar and E. López-Navarro, 2019-07-12)
A novel water supply network sectorization methodology based on a complete economic analysis, including uncertainties

Campbell-Gonzalez, Enrique; Izquierdo Sebastián, Joaquín; Montalvo Arango, Idel; Pérez García, Rafael (MDPI AG, 2016)

[EN] The core idea behind sectorization of water supply networks (WSNs) is to establish areas partially isolated from the rest of the network to improve operational control. Besides the benefits associated to sectorization, ...
A risk evaluation framework for the best maintenance strategy: the case of a marine salt manufacture firm

Carpitella, Silvia; Mzougui, Ilyas; Benítez López, Julio; Carpitella, Fortunato; Certa, Antonella; Izquierdo Sebastián, Joaquín; La Cascia, Marco (Elsevier, 2021-01)

[EN] This paper intends to contribute with a multi-criteria decision-making (MCDM) framework to support risk evaluation for maintenance activities carried out on critical systems in industry. We propose to first select the ...
A simple formula to find the closest consistent matrix to a reciprocal matrix

Benítez López, Julio; Izquierdo Sebastián, Joaquín; Pérez García, Rafael; Ramos Martínez, Eva (Elsevier, 2014-08-01)

Achieving consistency in pair-wise comparisons between decision elements given by experts or stakeholders is of paramount importance in decision-making based on the AHP methodology. Several alternatives to improve consistency ...
A survey on pre-processing techniques: Relevant issues in the context of environmental data mining

Gibert, Karina; Sanchez-Marre, Miquel; Izquierdo Sebastián, Joaquín (IOS Press, 2016)

One of the important issues related with all types of data analysis, either statistical data analysis, machine learning, data mining, data science or whatever form of data-driven modeling, is data quality. The more complex ...
Achieving matrix consistency in AHP through linearization

Benítez López, Julio; Delgado Galván, Xitlali Virginia; Izquierdo Sebastián, Joaquín; Pérez García, Rafael (Elsevier, 2011-09)

Matrices used in the analytic hierarchy process (AHP) compile expert knowledge as pair-wise comparisons among various criteria and alternatives in decision-making problems. Many items are usually considered in the same ...
Advanced Hydroinformatic Techniques for the Simulation and Analysis of Water Supply and Distribution Systems

Herrera Fernández, Antonio Manuel; Meniconi, S.; Alvisi, Stefano; Izquierdo Sebastián, Joaquín (MDPI AG, 2018)

[EN] This document is intended to be a presentation of the Special Issue "Advanced Hydroinformatic Techniques for the Simulation and Analysis of Water Supply and Distribution Systems". The final aim of this Special Issue ...
Agent-based Division of Water Distribution Systems into District Metered Areas

Izquierdo Sebastián, Joaquín; Herrera Fernández, Antonio Manuel; Montalvo Arango, Idel; Pérez García, Rafael (Universitat Politècnica de València, 2011)
Aire atrapado

Izquierdo Sebastián, Joaquín (Universitat Politècnica de València, 2013-07-17)

Este objeto simula el comportamiento de una bolsa de aire atrapada en un extremo ciego de una tubería. En el otro extremo se considera una fuente de energía, representada por la altura constante que proporciona un depósito ...
Aire atrapado; modelo adimensional

Izquierdo Sebastián, Joaquín (Universitat Politècnica de València, 2013-07-17)

Este objeto simula el comportamiento de una bolsa de aire atrapada en un extremo ciego de una tubería. En el otro extremo se considera una fuente de energía, representada por la altura constante que proporciona un depósito ...
Ajuste y calibración, con la llegada de nuevos datos, de un modelo epidemiológico simple

Benítez López, Julio; Carpitella, Silvia; Izquierdo Sebastián, Joaquín (Universitat Politècnica de València, 2020-05-26)

Los denominados sistemas dinámicos están presentes en cualquier ámbito evolutivo. Modelos matemáticos adecuados (físicos, sociales, económicos, biológicos, etc.) constituyen un laboratorio `in vitro¿ de tales sistemas, que ...