Reports de recerca
Recent Submissions
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Un compilador per l'UPCLISP
(1990)
External research report
Open AccessEl report recull el desenvolupament d'un compilador per a una versió de LISP pròpia de la UPC, l'UPCLISP. El procés de compilació va prenent una a una les funcions i després per a cadascuna d'elles fa una anàlisi de tipus ... -
Using interior point solvers for optimizing progressive lens models with spherical coordinates
(2019-05)
External research report
Open AccessDesigning progressive lenses is a complex problem that has beenpreviously solved by formulating an optimization model based on Cartesiancoordinates. In this work a new progressive lens model using spherical co-ordinates ... -
A new interior-point approach for large two-stage stochastic problems
(2020-04)
External research report
Open AccessTwo-stage stochastic models give rise to very large optimization problems. Several approaches havebeen devised for efficiently solving them, including interior-point methods (IPMs). However, usingIPMs, the linking columns ... -
An assigment free data driven approach to the dynamic origin destination matrix estimation problem
(2020-02-05)
External research report
Open AccessDynamic traffic models require dynamic inputs, and one of the main inputs are the Dynamic Origin-Destinations (OD) matrices describing the variability over time of the trip patterns across the network. The Dynamic OD Matrix ... -
Simulació de la mobilitat pel pas del tramvia per l’avinguda Diagonal (Francesc Macià – Pl. de les Glòries)
(2017-05)
External research report
Open AccessL’1 de març de 2016, l’Ajuntament de Barcelona i la Generalitat van signar el protocol de col·laboració per impulsar la connexió de les dues xarxes de tramvia, que estableix que l’Ajuntament determinarà el traçat de la ... -
A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
(2019-01-28)
External research report
Open AccessThe computation of the Newton direction is the most time consuming step of interior-point methods. This direction was efficiently computed by a combination of Cholesky factorizations and conjugate gradients in a specialized ... -
MEET-UP: Suport als estudiants amb TEA en estadis inicials a la UPC
(2019-01-22)
External research report
Open AccessL’objectiu és posar en marxa un pilot anomenat Meet-Up per acollir a partir del Juliol del 2017 a nous estudiants de la UPC afectats de TEA, mitjançant una sessió d’acollida inicial, amb explicació de la plataforma Moodle ... -
Notes on the measure of the structural similarity of OD matrices
(2018-12-07)
External research report
Open Access -
A specialized interior-point algorithm for huge minimum convex cost flows in bipartite networks
(2018-11)
External research report
Open Access -
Black body radiation calculus through fermionic string theory
(2018-03-25)
External research report
Restricted access - author's decision -
A linear optimization based method for data privacy in statistical tabular data
(2017-05-23)
External research report
Open AccessNational Statistical Agencies routinely disseminate large amounts of data. Prior to dissemination these data have to be protected to avoid releasing confidential information. Controlled tabular adjustment (CTA) is one of ... -
Stabilized Benders methods for large-scale combinatorial optimization, with appllication to data privacy
(2017-10-24)
External research report
Open AccessThe Cell Suppression Problem (CSP) is a challenging Mixed-Integer Linear Problem arising in statistical tabular data protection. Medium sized instances of CSP involve thousands of binary variables and million of continuous ...
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