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Browsing by Subject "Uncertainty"

Now showing items 1-20 of 147

A comparative analysis of a CO2 evaporator model using experimental heat transfer correlations and a flow pattern map

Patino, J.; Llopis, R.; Sanchez, D.; Sanz-Kock, C.; Cabello, R.; Torrella Alcaraz, Enrique (Elsevier, 2014-04)

This work analyses and compares two approaches to evaluate the boiling heat transfer of CO2 in a real evaporation process: classical empirical correlations and flow pattern maps. We develop a finite-volume mathematical ...
A conceptual framework for crop-based agri-food supply chain characterization under uncertainty

Alemany Díaz, María Del Mar; Esteso, Ana; Ortiz Bas, Ángel; Hernández Hormazabal, Jorge Esteban; Fernández, A.; Garrido, A.; Martin, J.; Liu, S.; Zao, G.; Guyon, C.; Iannacone, R. (Springer, 2021)

[EN] Crop-based Agri-food Supply Chains (AFSCs) are complex systems that face multiple sources of uncertainty that can cause a significant imbalance between supply and demand in terms of product varieties, quantities, ...
A Conceptual Framework for the Operations Planning of the Textile Supply Chains: insights for Sustainable and Smart Planning in Uncertain and Dynamic Context

Lorente-Leyva, Leandro; Alemany Díaz, María Del Mar; Peluffo-Ordóñez, Diego H. (Elsevier, 2024)

[EN] Recent practices in textile supply chains (SC) show a growing concern for sustainability not only in its economic dimension, but fundamentally in its environmental and social ones. One of the key management processes ...
A coupled stochastic inverse / sharp interface seawater intrusion approach for coastal aquifers under groundwater parameter uncertainty

Llopis Albert, Carlos; Merigó -Lindahl, José María; Xu, Yejun (Elsevier, 2016-09)

This paper presents an alternative approach to deal with seawater intrusion problems, that overcomes some of the limitations of previous works, by coupling the well-known SWI2 package for MODFLOW with a stochastic inverse ...
A decentralized production and distribution planning model in an uncertain environment

HEGEMAN, JOHANNES; Peidro Payá, David; Alemany Díaz, María del Mar; Díaz-Madroñero Boluda, Francisco Manuel (Springer Verlag, 2014-02-16)

[EN] Distributed Decision Making (DDM) is a discipline of decision theory in which decision making power is distributed among several decision making units. Supply Chain planning problems usually involve multiple ...
A fuzzy model for shortage planning under uncertainty due to lack of homogeneity in planned production lots

Alemany Díaz, María del Mar; Grillo Espinoza, Hanzel; Ortiz Bas, Ángel; Fuertes Miquel, Vicente Samuel (Elsevier, 2015-08-01)

Lack of homogeneity in the product (LHP) affects several sectors like horticulture, reverse logistics, furniture, ceramics and leathers, among others. Productive processes with LHP are characterized by manufacturing units ...
A Fuzzy Order Promising Model With Non-Uniform Finished Goods

Grillo-Espinoza, Hanzel; Alemany Díaz, María Del Mar; Ortiz Bas, Ángel; Mula, Josefa (Springer-Verlag, 2018)

[EN] In this paper, in order to reliably meet the homogeneity required by customers, a fuzzy model is proposed to support the promising process in LHP contexts after taking into account uncertainty in planned homoge- neous ...
A model-driven decision support system for reallocation of supply to orders under uncertainty in ceramic companies

Alemany Díaz, María del Mar; Ortiz Bas, Ángel; Boza, Andres; Fuertes Miquel, Vicente Samuel (Taylor & Francis, 2015-07-06)

In ceramic companies, uncertainty in the tone and gage obtained in first quality units of the same finished good (FG) entails frequent discrepancies between planned homogeneous quantities and real ones. This fact can lead ...
A review of mathematical models for supporting the order promising process under Lack of Homogeneity in Product and other sources of uncertainty

Grillo-Espinoza, Hanzel; Alemany Díaz, María Del Mar; Ortiz Bas, Ángel (Elsevier, 2016)

[EN] This paper presents a review of mathematical programming models for supporting the order promising process (OPP) under Lack of Homogeneity in Product (LHP) conditions and uncertainty in a modelling approach. LHP appears ...
A Review of Multi-Criteria Assessment of the Social Sustainability of Infrastructures

Sierra-Varela, Leonardo Andres; Yepes, V.; Pellicer, Eugenio (Elsevier, 2018-06)

[EN] Nowadays multi-criteria methods enable non-monetary aspects to be incorporated into the assessment of infrastructure sustainability. Yet evaluation of the social aspects is still neglected and the multi-criteria ...
A review on staged design of water distribution networks

Tsiami, Lydia; Makropoulos, Christos; Savic, Dragan (Editorial Universitat Politècnica de València, 2024-03-06)

[EN] Water distribution networks (WDNs) evolve continuously over time. Changes in water demands and pipe deterioration require construction upgrades to be performed on the network during its entire lifecycle. However, ...
A rolling horizon approach for material requirement planning under fuzzy lead times

Díaz-Madroñero Boluda, Francisco Manuel; Mula, Josefa; Jiménez, Mariano; Peidro Payá, David (Taylor & Francis, 2017)

[EN] This paper proposes a fuzzy multi-objective integer linear programming (FMOILP) approach to model a material requirement planning (MRP) problem with fuzzy lead times. The objective functions minimise the total costs, ...
A stochastic goal programming model to derive stable cash management policies

Salas-Molina, Francisco; Rodriguez-Aguilar, Juan A.; Pla Santamaría, David (Springer-Verlag, 2020-02)

[EN] In this paper, we consider cash management systems with multiple bank accounts described by a given particular relationship between accounts and by a linear state transition law. Since cash managers may simultaneously ...
Accounting for climate change uncertainty in long-term dam risk management

Fluixá-Sanmartín, Javier; Escuder Bueno, Ignacio; Morales-Torres, Adrián; Castillo-Rodríguez, J.T. (American Society of Civil Engineers, 2021-04)

[EN] This paper presents a practical approach to adaptive management of dam risk based on robust decision-making strategies coupled with estimation of climate scenario probabilities. The proposed methodology, called ...
Achieving Autonomic Web Service Compositions with Models at Runtime

Alférez Salinas, Germán Harvey (Universitat Politècnica de València, 2013-12-26)

Over the last years, Web services have become increasingly popular. It is because they allow businesses to share data and business process (BP) logic through a programmatic interface across networks. In order to reach the ...
Adequacy of DEA as a regulatory tool in the water sector. The impact of data uncertainty

Cabrera Rochera, Enrique; Estruch-Juan, María Elvira; Molinos-Senante, M. (Elsevier, 2018)

[EN] The regulation of water services shares many similarities with that of other utilities such as electricity or telecommunications. As a result, similar methods are often used by regulators to assess the efficiency of ...
Advanced methods and models in uncertainty for the order promising process in supply chain characterized by the lack of homogeneity in product

Grillo Espinoza, Hanzel (Universitat Politècnica de València, 2019-09-22)

The Lack of Homogeneity in the Product (LHP) appears in productive processes with raw materials, which directly stem from nature and/or production processes with operations that confer heterogeneity to the characteristics ...
Advances on the Failure Analysis of the Dam-Foundation Interface of Concrete Dams

Altarejos García, Luis; Escuder Bueno, Ignacio; Morales Torres, Adrián (MDPI, 2015)

[EN] Failure analysis of the dam-foundation interface in concrete dams is characterized by complexity, uncertainties on models and parameters, and a strong non-linear softening behavior. In practice, these uncertainties ...
Advantages of using relevant nearly optimal solutions in multi-objective tuning of robust controllers

Pajares-Ferrando, Alberto; Blasco, Xavier; Herrero Durá, Juan Manuel; Veyna-Robles, Uriel (Elsevier, 2023-08)

[EN] This paper presents a new approach for the multiobjective optimal design of robust controllers in systems with stochastic parametric uncertainty. Traditionally, uncertainty is incorporated into the optimization process. ...
Aggregation operators in economic growth analysis and entrepreneurial group decision-making

Merigó, José M.; Peris-Ortiz, Marta; Navarro-García, Antonio; Rueda-Armengot, Carlos (Elsevier, 2016-10)

[EN] An economic crisis can be measured from different perspectives. A very commonly used measure is that of a country's economic growth. When growth is lower than desired, the economy is assumed to be near stagnation or ...