Now showing items 21-40 of 42

    • Model predictive control strategy applied to different types of building for space heating 

      Gholamibozanjani, Gohar; Tarragona Roig, Joan; Gracia Cuesta, Alvaro de; Fernàndez Camon, César; Cabeza, Luisa F.; Farid, Mohammed M. (Elsevier, 2018)
      In recent years, the concept of energy-efficient buildings has attracted widespread attention due to growing energy consumption in different types of buildings. The application of thermal energy storage (TES) systems, ...
    • Modeling energy consumption in automated vacuum waste collection systems 

      Fernàndez Camon, César; Manyà Serres, Felip; Mateu Piñol, Carles; Solé Mauri, Francina (Elsevier, 2014)
      In a world where resources are scarce and urban areas consume the vast majority of these resources, it is vital to make cities greener and more sustainable. A smart city is a city in which information and communications ...
    • Modelling a grading scheme for peer-to-peer accommodation: Stars for Airbnb 

      Martín Fuentes, Eva; Fernàndez Camon, César; Mateu Piñol, Carles; Mariné Roig, Estela (Elsevier, 2018)
      This study aims, firstly, to determine whether hotel categories worldwide can be inferred from features that are not taken into account by the institutions in charge of assigning such categories and, if so, to create a ...
    • Obtención de Modelos 3D a partir de Proyecciones Axonométricas 

      Béjar Torres, Ramón; Cabiscol i Teixidó, Alba; Fernàndez Camon, César; López, M.; Manyà Serres, Felip (2002)
      En este artículo presentamos un método computacional para la resolución del problema de la interpretación de una escena 3D a partir de una proyección axonométrica de la misma. Si bien este problema había sido tratado ...
    • On balanced CSPs with high treewidth 

      Ansótegui Gil, Carlos José; Béjar Torres, Ramón; Fernàndez Camon, César; Mateu Piñol, Carles (Association for the Advancement of Artificial Intelligence, 2007)
      Tractable cases of the binary CSP are mainly divided in two classes: constraint language restrictions and constraint graph restrictions. To better understand and identify the hardest binary CSPs, in this work we propose ...
    • On the hardness of solving edge matching puzzles as SAT or CSP problems 

      Ansótegui Gil, Carlos José; Béjar Torres, Ramón; Fernàndez Camon, César; Mateu Piñol, Carles (Springer Verlag, 2013)
      Edge matching puzzles have been amongst us for a long time now and traditionally they have been considered, both, a children’s game and an interesting mathematical divertimento. Their main characteristics have already been ...
    • On the Performance of MaxSAT and MinSAT Solvers on 2SAT-MaxOnes 

      Argelich Romà, Josep; Béjar Torres, Ramón; Fernàndez Camon, César; Mateu Piñol, Carles; Planes Cid, Jordi (Springer International Publishing Switzerland, 2016-06-01)
      We analyze and compare two solvers for Boolean optimization problems: WMaxSatz, a solver for Partial MaxSAT, and MinSatz, a solver for Partial MinSAT. Both MaxSAT and MinSAT are similar, but previous results indicate that ...
    • Optimization of Design Variables of a Phase Change Material Storage Tank and Comparison of a 2D Implicit vs. 2D Explicit Model 

      Crespo, Alicia; Zsembinszki, Gabriel; Vérez, David; Borri, Emiliano; Fernàndez Camon, César; Cabeza, Luisa F.; Gracia Cuesta, Alvaro de (MDPI, 2021)
      In this study, a thermal energy storage tank filled with commercial phase change material flat slabs is investigated. The tank provides heat at around 15 C to the evaporator of a seasonal thermal energy storage system ...
    • Optimized demand side management (DSM) of peak electricity demand by coupling low temperature thermal energy storage (TES) and solar PV 

      Saffari Tabalvandani, Mohammad; Gracia Cuesta, Alvaro de; Fernàndez Camon, César; Belusko, Martin; Boer, Dieter; Cabeza, Luisa F. (Elsevier, 2018)
      Cooling in the industry sector contributes significantly to the peak demand placed on an electrical utility grid. New electricity tariff structures include high charges for electricity consumption in peak hours which leads ...
    • Regular-SAT: A many-valued approach to solving combinatorial problems 

      Béjar Torres, Ramón; Manyà Serres, Felip; Cabiscol i Teixidó, Alba; Fernàndez Camon, César; Gomes, Carla (Elsevier, 2007)
      Regular-SAT is a constraint programming language between CSP and SAT that—by combining many of the good properties of each paradigm—offers a good compromise between performance and expressive power. Its similarity to SAT ...
    • Sensor networks and distributed CSP: communication, computation and complexity 

      Béjar Torres, Ramón; Domshlak, Carmel; Fernàndez Camon, César; Gomes, Carla; Krishnamachari, Bhaskar; Selman, Bart; Valls Marsal, Magda (Elsevier, 2005)
      We introduce SensorDCSP, a naturally distributed benchmark based on a real-world application that arises in the context of networked distributed systems. In order to study the performance of Distributed CSP (DisCSP) ...
    • Simulation-based optimization of PCM melting temperature to improve the energy performance in buildings 

      Saffari Tabalvandani, Mohammad; Gracia Cuesta, Alvaro de; Fernàndez Camon, César; Cabeza, Luisa F. (Elsevier, 2017)
      Globally, a considerable amount of energy is consumed by the building sector. The building envelope can highly influence the energy consumption in buildings. In this regard, innovative technologies such as thermal energy ...
    • Smart control of dynamic phase change material wall system 

      Gracia Cuesta, Alvaro de; Tarragona Roig, Joan; Crespo, Alicia; Fernàndez Camon, César (Elsevier, 2020)
      This work presents two different smart control algorithms to manage a novel phase change material system integrated into building walls and roofs. This system is able to move a phase change material layer with respect to ...
    • Solving the routing and wavelength assignment problem with conflict-driven ASP solvers 

      Béjar Torres, Ramón; Mateu Piñol, Carles; Fernàndez Camon, César; Guitart Bravo, Francesc (IOS Press, 2015)
      The Routing and Wavelength Assignment (RWA) problem is an optical networking problem that aims to improve data transmission by eliminating optoelectronic conversions through the network. The RWA problem is in the set of ...
    • Statistical modelling of CSP solving algorithms performance 

      Mateu Piñol, Carles; Béjar Torres, Ramón; Fernàndez Camon, César (Springer, 2005)
      The goal of this work is to try to create a statistical model, based only on easily computable parameters from the CSP problem to predict runtime behaviour of the solving algorithms, and let us choose the best algorithm ...
    • Statistical Regimes Across Constrainedness Regions 

      Gomes, Carla; Fernàndez Camon, César; Selman, Bart; Bessière, Christian (Springer Verlag, 2005)
      Much progress has been made in terms of boosting the effectiveness of backtrack style search methods. In addition, during the last decade, a much better understanding of problem hardness, typical case complexity, and ...
    • Study on the optimum PCM melting temperature for energy savings in residential buildings worldwide 

      Saffari Tabalvandani, Mohammad; Gracia Cuesta, Alvaro de; Fernàndez Camon, César; Zsembinszki, Gabriel; Cabeza, Luisa F. (IOP Publishing, 2017)
      To maintain comfort conditions in residential buildings along a full year period, the use of active systems is generally required to either supply heating or cooling. The heating and cooling demands strongly depend on the ...
    • Systematic review on model predictive control strategies applied to active thermal energy storage systems 

      Tarragona Roig, Joan; Pisello, Anna Laura; Fernàndez Camon, César; Gracia Cuesta, Alvaro de; Cabeza, Luisa F. (Elsevier, 2021)
      This paper presents a review of the application of model predictive control strategies to active thermal energy storage systems. To date, model predictive control has been used to manage such energy systems as heating, ...
    • The impact of balancing on problem hardness in a highly structured domain 

      Ansótegui Gil, Carlos José; Béjar Torres, Ramón; Fernàndez Camon, César; Gomes, Carla; Mateu Piñol, Carles (Association for the Advancement of Artificial Intelligence, 2006)
      Random problem distributions have played a key role in the study and design of algorithms for constraint satisfaction and Boolean satisfiability, as well as in ourunderstanding of problem hardness, beyond standard worst-case ...
    • The more the merrier? Number of reviews versus score on TripAdvisor and Booking.com 

      Martín Fuentes, Eva; Mateu Piñol, Carles; Fernàndez Camon, César (Taylor & Francis, 2018)
      The aim of this research is to confirm whether there is a relationship between the number of reviews and the hotel’s score on Booking.com and TripAdvisor and whether the relationship is different depending on the geographical ...