GNOM - Grup d'Optimització Numèrica i Modelització
El treball del grup comprèn l'optimització numèrica, la modelització de problemes resolubles amb optimització, i l'aplicació de tècniques adients a problemes de l'enginyeria, la indústria, la logística i les tecnologies de la informació. L'optimització numèrica inclou l'estudi de les propietats del problemes estudiats, l'anàlisi de nous algorismes d'optimització (lineal, no lineal, contínua, entera i combinatòria), el desenvolupament de procediments numèrics per a la seva implementació computacional eficient i la comparació amb algorismes previs, si existeixen. La part de modelització implica la cerca de formulacions escaients que permetin la resolució de problemes reals, sovint de gran dimensió. Els problemes reals en que el grup està treballant actualment són: protecció i privacitat de dades estadístiques; i generació òptima d'electricitat en un entorn multimercat.
The group works on both the numerical optimisation and the modelling of problems that can be solved through optimisation. Its work on numerical optimisation includes the analysis of new optimisation algorithms (linear, nonlinear, continuous and integer) and their convergence, the development of numerical procedures for their efficient computational implementation, and the comparison to existing algorithms. The work on modelling focuses on the solution of real problems, which are often large-scale, by finding an equivalentmathematical formulation leading to an optimisation problem, and applying a suitable solver, that has either been specially developed or is commercially available. The modelling languages that are available are used.
The group works on both the numerical optimisation and the modelling of problems that can be solved through optimisation. Its work on numerical optimisation includes the analysis of new optimisation algorithms (linear, nonlinear, continuous and integer) and their convergence, the development of numerical procedures for their efficient computational implementation, and the comparison to existing algorithms. The work on modelling focuses on the solution of real problems, which are often large-scale, by finding an equivalentmathematical formulation leading to an optimisation problem, and applying a suitable solver, that has either been specially developed or is commercially available. The modelling languages that are available are used.
Collections in this community
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Articles de revista [85]
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Llibres [1]
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Reports de recerca [33]
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Working papers [1]
Recent Submissions
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An algorithm for the microaggregation problem using column generation
(2020-06)
External research report
Open AccessThe field of Statistical Disclosure Control aims at reducing the risk of re-identification of an individualwhen disseminating data, and it is one of the main concerns of national statistical agencies. OperationsResearch ... -
Battery electric buses participation in electricity markets and power systems
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Restricted access - publisher's policyMany European cities have committed to procure only zero-emission buses by 2025, considering battery electric buses as the first choice to achieve this objective. However, whilst this technology promises to solve several ... -
Critical evaluation of European balancing markets to enable the participation of Demand Aggregators
(2020-04-15)
Article
Restricted access - publisher's policyEuropean Directives are incentivizing consumers to play an active role in the electricity system and to collaborate to maintain its stability, which has been historically provided by large generation power plants. However, ... -
Development of ARCADIA: a tool for assessing the quality of peer-review reports in biomedical research
(2020-06)
Article
Open AccessObjective To develop a tool to assess the quality of peer- review reports in biomedical research. Methods We conducted an online survey intended for biomedical editors and authors. The survey aimed to (1) determine if ... -
Management and activation of energy flexibility at building and market level: a residential case study
(2020-03-01)
Article
Open AccessThe electricity sector foresees a significant change in the way energy is generated and distributed in the coming years. With the increasing penetration of renewable energy sources, smart algorithms can determine the ... -
Comparison between economic and environmental drivers for demand side aggregator
(2020-08)
Article
Open AccessDemand-side flexibility is a promising source of the energy system that might enhance renewable energy penetration and help to democratize the electricity sector. However, it is not clear what is the best strategy to adopt ... -
Using interior point solvers for optimizing progressive lens models with spherical coordinates
(2019-12-19)
Article
Open AccessDesigning progressive lenses is a complex problem that has been previously solved by formulating an optimization model based on Cartesian coordinates. This work presents a new progressive lens model using spherical ... -
Optimal postponement in supply chain network design under uncertainty: an application for additive manufacturing
(Taylor & Francis, 2020-06-17)
Article
Open AccessThis study presents a new two-stage stochastic programming decision model for assessing how to introduce some new manufacturing technology into any generic supply and distribution chain. It additionally determines the ... -
SABINA: el proyecto que entiende la agregación de la demanda como el camino hacia la transición energética reduciendo las emisiones
(2019)
Conference report
Open AccessPersiguiendo los objetivos de incrementar el uso de energías renovables, reducción de las emisiones y del consumo, el proyecto H2020 SABINA maximiza las posibilidades de la flexibilidad de los edificios en base a dos ... -
How building and district algorithms enhance renewable energy integration in energy markets
(2019)
Conference report
Open AccessThis study shows the results of the SABINA H2020 project, which analyzes the effect of two level optimization algorithms to increase the consumption of renewable power sources and reduce greenhouse gas emissions. First, ... -
Miniature switchable millimeter-wave BiCMOS low-noise amplifier at 120/140 GHz using an HBT switch
(2019-10-01)
Article
Open AccessA 120–140 GHz frequency-switchable, very compact low-noise amplifier (LNA) fabricated in a 0.13 µm SiGe:C BiCMOS technology is proposed. A single radio-frequency (RF) switch composed of three parallel hetero junction bipolar ... -
Optimal energy management system for V2G chargers combined with PV and ESS in a real environment
(2019)
Conference report
Open AccessThe integration of Electric Vehicles in electricity grids is very likely to pose several challenges to the electrical grid operation and expansion. The potential flexibility of the load associated to the ...