Now showing items 1-20 of 241

• #### 4IR Integration of information technology best practice framework in operational technology ﻿

(OmniaScience, 2021)
Article
Open Access
Purpose: Since inception in the 1970s, Operational Technology (OT) systems were designed to operate in isolation from Information Technology (IT) systems mainly due to differences in objectives relating to Confidentiality, ...
• #### A branch and bound approach for the capacitated plant location problem using cuts from the partial convex hull ﻿

(1984)
Research report
Open Access
The efficient solution of capacitated plant location problems usually requires the development of specific software mainly when the problems are pure integer ones, standard mathematical programming codes being highly ...
• #### A case study for the assessment of a dynamic passenger ride sharing mobility service ﻿

(2017)
Conference report
Restricted access - publisher's policy
Sustainable mobility is not merely a technological question. While automotive technology will be part of the solution, it will also be combined with a paradigm shift from car ownership to vehicle usage, which itself will ...
• #### A Dynamic Stochastic Model For Balance Sheet Optimization ﻿

(Universitat Politècnica de Catalunya / Illinois Institute of Technology, 2013)
Bachelor thesis
Restricted access - author's decision
Covenantee:   Illinois Institute of Technology
• #### A flexoelectric microelectromechanical system on silicon ﻿

(2016)
Article
Open Access
Flexoelectricity allows a dielectric material to polarize in response to a mechanical bending moment and, conversely, to bend in response to an electric field. Compared with piezoelectricity, flexoelectricity is a weak ...
• #### A flow formulation for the optimum communication spanning tree ﻿

(Universidad de La Laguna, 2013)
Conference report
Open Access
In this paper we address the Optimum Communication Spanning Tree Problem. We present a formulation that uses three index variables and we propose several families of inequalities, which can be used to reinforce the ...
• #### A local multiple proper generalized decomposition based on the partition of unity ﻿

(John Wiley & sons, 2019-10-12)
Article
Open Access
It is well known that model order reduction techniques that project the solution of the problem at hand onto alow-dimensional subspace present difficulties when this solution lies on a non-linear manifold. To overcomethese ...
• #### A method of multiobjective decision making using a vector value function ﻿

(Institut d'Estadística de Catalunya, 1994)
Article
Open Access
A decision situation with partial information on preferences by means of a vector value function is assumed. The concept of minimum value dispersion solution as a reference point joined with a pseudodistance function from ...
• #### A mixed-integer linear program for real-time train platforming management ﻿

(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 model and an algorithm for the grouping problem in telecom networks ﻿

(Universitat Politècnica de Catalunya. Centre de Càlcul, 1991)
Article
Open Access
This paper deals with the so called grouping problem which arises in telecommunication network optimization when transmission equipment with a certain hierarchy is used. It is shown how this problem is embedded in the ...
• #### A model for the simultaneous selection of bus lines and frequency setting problems in the expansion of public transit systems ﻿

(Elsevier, 2020-03-02)
Article
Open Access
When expanding an existing public transport system a common practice consists of defining a set of candidate new lines andfrom them, choose those that will revert into a greater increase of the system’s performance while ...
• #### A new optimal electricity market bid model solved through perspective cuts ﻿

(Springer, 2011-11)
Article
Restricted access - publisher's policy
On current electricity markets the electrical utilities are faced with very sophisticated decision making problems under uncertainty. Moreover, when focusing in the short-term management, generation companies must include ...
• #### A production planning problem in FMS ﻿

(Universitat Politècnica de Barcelona. Centre de Càlcul, 1987)
Article
Open Access
We present in this work a hierarchical approach for generating alternatives for production planning in a generic floor shop problem within the environment of Flexible Manufacturing Systems (hereafter, FMS). Briefly, the ...
• #### A Proper Generalized Decomposition (PGD) approach to crack propagation in brittle materials: with application to random field material properties ﻿

(Springer, 2020-02)
Article
Open Access
Understanding the failure of brittle heterogeneous materials is essential in many applications. Heterogeneities in materialproperties are frequently modeled through random fields, which typically induces the need to solve ...
• #### A review of impact damage detection in structures using strain data ﻿

(2010)
Article
Open Access
This paper aims to provide a state-of-the-art review on impact damage detection techniques in structures using strain data. An overview of impact detection systems is provided. These include sensors, specimens, and impact ...
• #### A semi-parametric joint model for two sequential times to events and one longitudinal covariate ﻿

(2012)
Conference lecture
Open Access
The present work proposes a joint model for two sequential times to events together with longitudinal information, as an extension of the joint model by Wolfsohn and Tsiatis (1997) for one time to event and one longitudinal ...
• #### A simulation-enhanced lean design process ﻿

(School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2009-06)
Article
Open Access
A traditional lean transformation process does not validate the future state before implementation, relying instead on a series of iterations to modify the system until performance is satisfactory. An enhanced lean process ...
• #### A stochastic programming model for the optimal electricity market bid problem with bilateral contracts for thermal and combined cycle units ﻿

(2008-10)
Article
Open Access
This paper developed a stochastic programming model that integrated the most recent regula- tion rules of the Spanish peninsular system for bilateral contracts in the day-ahead optimal bid problem. Our model allows a ...
• #### A stochastic version of the strategy-based congested transit assignment model and a technique by smoothing approximations ﻿

(Springer, 2018)
Article
Restricted access - publisher's policy
This paper develops a stochastic version for the strategybased congested transit assignment problem stated by Cominetti and Correa (Trans. Sci. 35(3):250-267, 2001). As a distinctive approach, this stochastic version takes ...
• #### A submodular approach to the efficient placement of electric vehicle charging stations ﻿

(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 ...