Browsing by Subject "Administració--Models matemàtics"

Now showing items 1-20 of 25

    • A mixed-integer linear program for real-time train platforming management 

      Garcia Ródenas, Ricardo; López García, Maria Luz; Cadarso Morga, Luis; Codina Sancho, Esteve (Elsevier, 2022-03-11)
      Article
      Open Access
      Unexpected events may perturb operations and generate conflicts that must be addressed promptly to limit delay propagation and other negative impacts on the network. The real-time railway traffic management problem deals ...

    • A submodular approach to the efficient placement of electric vehicle charging stations 

      Barceló Castelló, Mariola (Universitat Politècnica de Catalunya, 2021-10)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Immense
      Our contribution is an algorithm for the cardinality constrained placement of EV charge stations that achieves a $1-\frac{1}{e}-\epsilon$ (63\%) approximation guarantee with a computational complexity of $\mathcal{O}(n ...

    • Algoritmos para la asignación de pasajeros en redes de transporte público 

      Rosell Camps, Francisca (Universitat Politècnica de Catalunya, 2014-06)
      Master thesis
      Restricted access - author's decision
      Los modelos para la asignación de pasajeros son una magnífica herramienta para facilitar la planificación de las redes de transporte público y ayudan en la predicción de la utilización de las diferentes líneas por parte ...

    • An heuristic algorithm for dynamic network loading 

      Codina Sancho, Esteve; Barceló Bugeda, Jaime (International Federation of Automatic Control (IFAC), 1997-06-01)
      Article
      Open Access
      This paper describes an heuristic procedure for the problem of determining the time evolution of traffic flows and routes on a road net work with the key requirement that its computational costs must be appealing so as to ...

    • Analyzing SPSA approaches to solve the non-linear non-differentiable problems arising in the assisted calibration of traffic simulation models 

      Ros Roca, Xavier (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2017-01)
      Master thesis
      Open Access
      Mathematical and simulation models of systems lay at the core of decision support systems, and their role become more critical as more complex is the system object of decision. The decision process usually encompasses the ...

    • Caracterització de formulacions fortes del problema Unit Commitment 

      Escandell Planells, Jordan (Universitat Politècnica de Catalunya, 2017-07)
      Bachelor thesis
      Open Access
      El problema del unit commitment (UC) és un dels problemes combinatoris de major rellevància en l'aplicació de l'optimització matemàtica als sistemes d'energia i mercats elèctrics, essent fonamental per a la resolució ...

    • Development of heuristic methods for solving detection layout models 

      Valdivia García, Ana (Universitat Politècnica de Catalunya, 2014-07)
      Bachelor thesis
      Restricted access - author's decision
      The Information and Communications Technologies penetration in the transport sector has led to the emergence of new mechanisms for attracting trac data. The importance of nding the best location for these mechanisms into ...

    • Dynamic user equilibrium on traffic networks. An analysis and a discretized model 

      Codina Sancho, Esteve; Barceló Bugeda, Jaime (International Federation of Automatic Control (IFAC), 1997-06-01)
      Article
      Open Access
      This paper formulates a discretized version of the Dynamic User Equilibrium problem on traffic networks as a variational inequality problem with special emphasys on the traffic dynamics. A finite difference approximation ...

    • Estudi de la cohort de pacients d'Insuficiència Cardíaca tractats amb Teràpia de Resincronització a l'Hospital Clínic de Barcelona 

      Borràs Amoraga, Roger (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2018-01)
      Master thesis
      Restricted access - author's decision
      En aquest projecte, estudiarem una cohort de pacients amb Teràpia de Resincronització Cardíaca (TRC). Els pacients de resincronització cardíca són una tipologia de pacients que pateixen mala sincronització en el funcionament ...

    • ICT based estimation of time-dependent origin-destination matrices 

      Barceló Bugeda, Jaime; Montero Mercadé, Lídia; Marqués, Laura; Carmona Bautista, Carlos (2011)
      Conference report
      Open Access
      Time-Dependent Origin-Destination (OD) matrices are a key input to Dynamic Traffic Models, microscopic and mesoscopic traffic simulators are relevant examples of such models, traditionally used to assist in the design and ...

    • Implementation of a Simulation Model for Inventory Level in Multi-Echelon Supply Chains 

      Oliveres Luna, Patrícia (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2019-06)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Accenture
      The objective of this paper was to implement an inventory level simulation model in order to reproduce the flow of inventory in any supply chain. The model we have created accepts any configuration of supply chain and is ...

    • Interactive simulation on a smart Phone 

      Cueto, E.; Huerta, Antonio; Chinesta, Francisco (2012-01)
      Article
      Restricted access - publisher's policy
      Traditionally, Simulationbased Engineering Sciences (SBES) made use of static data inputs to perform the simulations. Namely parameters of the model, boundary conditions, etc. were traditionally obtained by experimentation ...

    • Interdiction optimization approach to forest fuel treatment planning 

      Jiménez Piqueras, Celia (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2019-10)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Centre Tecnològic Forestal de Catalunya
      In this master s thesis, it is presented the problem of mitigating the damage caused in a landscape by a wildfire. Specifically, in the problem, wildfire managers aim to minimize the impact of a worst-case wildfire on the ...

    • Learning agent in heuristic architecture optimization 

      Abelló Gàllego, Clara (Universitat Politècnica de Catalunya, 2015-02)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Cornell University. Sibley School of Mechanical and Aerospace Engineering
      One of the main problems of current system design and architecture tools is the communication between the tool and the user and vice-versa. This work describes an on-going effort to improve that communication by incorporating ...

    • Microscopic disruption management: energy consumption and passenger compensation optimisation 

      Cadarso Morga, Luis; Codina Sancho, Esteve; Garcia Ródenas, Ricardo (Elsevier, 2022-03-11)
      Article
      Open Access
      Rail operations are often disrupted by accidents that cause traffic to diverge from the scheduled operations, rendering it difficult to run the schedule as planned. In such a case, the operator must change the schedule to ...

    • Minimizando el coste de operación entre centros de procesamiento de datos federados desde una aproximación estocástica 

      León León, Jorge (Universitat Politècnica de Catalunya, 2014-01)
      Master thesis
      Open Access
      En este proyecto se ha resuelto el problema de migración de máquinas virtuales en federaciones de centros de procesamiento de datos con el fin de reducir los costes de operacion (coste energético y de comunicación). Hemos ...

    • Modelling human network behaviour using simulation and optimization tools: the need for hybridization 

      Gruler, Aljoscha; de Armas, Jesica; Juan, Angel A.; Goldsman, David (Institut d'Estadística de Catalunya, 2019-12-16)
      Article
      Open Access
      The inclusion of stakeholder behaviour in Operations Research / Industrial Engineering (OR/IE) models has gained much attention in recent years. Behavioural and cognitive traits of people and groups have been integrated ...

    • Optimal management for innovative electric vehicle charging station with machine learning forecasting modules 

      Cardoner Valbuena, David (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2019-06)
      Master thesis
      Open Access
      In many situations, the resources in the organizations are focused on the improvement of processes in order to reduce their costs. Seen in this way, the use of an energy management system can offer a reduction of costs in ...

    • Optimización de stocks mediante simulación 

      Girbau Xalabarder, Joaquim (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2020-11)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Schneider Electric España S.A.U
      Se ha realizado un prototipo de simulación de stocks para obtener, de cada producto analizado, el punto de pedido óptimo y la cantidad a comprar óptima cada vez que el stock es menor al punto de pedido. Se ha modelizado ...

    • Problemas de diseño de red multiartículo mediante la descomposición de Benders 

      Rodríguez Barreiro, Marta (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2016-06)
      Master thesis
      Restricted access - author's decision
      Los problemas de diseño de red multiartículo pueden ser tratados como MILP, donde las variables binarias representan la toma de decisiones y las continuas el flujo que circula por la red. En esta memoria vamos a resolver ...