BIRD, BCAM's Institutional Repository Data: Recent submissions
Now showing items 120 of 962

Robust combination of the Morris and Sobol methods in complex multidimensional models
(Environmental Modelling and Software, 2019)Conducting global sensitivity analysis using variance decomposition methods in complex simulation models with many input factors is usually unaffordable. An alternative is to first apply a screening method to reduce the ... 
Asymptotic behaviour of some nonlocal equations in mathematical biology and kinetic theory
(201909)We study the longtime behaviour of solutions to some partial differential equations arising in modeling of several biological and physical phenomena. In this work, the type of the equations we consider is mainly nonlocal, ... 
Clinical correlates of mathematical modeling of cortical spreading depression: Single‐cases study
(Brain and Behavior, 20190728)Introduction: Considerable connections between migraine with aura and cortical spreading depression (CSD), a depolarization wave originating in the visual cortex and traveling toward the frontal lobe, lead to the hypothesis ... 
Data generation approaches for topic classification in multilingual spoken dialog systems
(ACM International Conference Proceeding Series, 2019)The conception of spokendialog systems (SDS) usually faces the problem of extending or adapting the system to multiple languages. This implies the creation of modules specically for the new languages, which is a time ... 
Anatomy of the attraction basins: Breaking with the intuition
(Evolutionary Computation, 2019)olving combinatorial optimization problems efficiently requires the development of algorithms that consider the specific properties of the problems. In this sense, local search algorithms are designed over a neighborhood ... 
Characterising the rankings produced by combinatorial optimisation problems and finding their intersections
(GECCO '19 Proceedings of the Genetic and Evolutionary Computation Conference, 2019)The aim of this paper is to introduce the concept of intersection between combinatorial optimisation problems. We take into account that most algorithms, in their machinery, do not consider the exact objective function ... 
Approaching the Quadratic Assignment Problem with Kernels of Mallows Models under the Hamming Distance
(Proceedings of the Genetic and Evolutionary Computation Conference Companion, 201907)The Quadratic Assignment Problem (QAP) is a specially challenging permutationbased nphard combinatorial optimization problem, since instances of size $n>40$ are seldom solved using exact methods. In this sense, many ... 
Minimizers of a Landaude Gennes energy with a subquadratic elastic energy
(Archive for Rational Mechanics and Analysis, 2019)We study a modified Landaude Gennes model for nematic liq uid crystals, where the elastic term is assumed to be of subquadratic growth in the gradient. We analyze the behaviour of global minimizers in two and threedimensional ... 
ExplicitinTime Variational Formulations for GoalOriented Adaptivity
(201910)GoalOriented Adaptivity (GOA) is a powerful tool to accurately approximate physically relevant features of the solution of Partial Differential Equations (PDEs). It delivers optimal grids to solve challenging engineering ... 
Portable simulation framework for diffusion MRI
(Journal of Magnetic Resonance, 20190923)The numerical simulation of the diffusion MRI signal arising from complex tissue microstructures is helpful for understanding and interpreting imaging data as well as for designing and optimizing MRI sequences. The ... 
A roadmap to integrate astrocytes into Systems Neuroscience
(Glia, 20190506)Systems Neuroscience is still mainly a neuronal field, despite the plethora of evidence supporting the fact that astrocytes modulate local neural circuits, networks, and complex behaviors. In this article, we sought to ... 
Sentiment analysis with genetically evolved Gaussian kernels
(GECCO '19 Proceedings of the Genetic and Evolutionary Computation Conference, 2019)Sentiment analysis consists of evaluating opinions or statements based on text analysis. Among the methods used to estimate the degree to which a text expresses a certain sentiment are those based on Gaussian Processes. ... 
Metastable resting state brain dynamics
(Frontiers in Computational Neuroscience, 20190906)Metastability refers to the fact that the state of a dynamical system spends a large amount of time in a restricted region of its available phase space before a transition takes place, bringing the system into another state ... 
Optimal multiimpulse space rendezvous considering limited impulse using a discretized Lambert problem combined with evolutionary algorithms
(8th European Conference for Aeronautics and Space Sciences, 20190701)In this paper, a direct approach is presented to tackle the multiimpulse rendezvous problem considering the impulse limit. Particularly, the standard Lambert problem is extended toward several consequential orbit transfers ... 
Reconstruction of the Derivative of the Conductivity at the Boundary
(201908)We describe a method to reconstruct the conductivity and its normal derivative at the boundary from the knowledge of the potential and current measured at the boundary. This boundary determination implies the uniqueness ... 
A Bilinear Strategy for Calderón's Problem
(201908)Electrical Impedance Imaging would suffer a serious obstruction if for two different conductivities the potential and current measured at the boundary were the same. The Calder\'on's problem is to decide whether the ... 
An evolutionary discretized Lambert approach for optimal longrange rendezvous considering impulse limit
(Aerospace Science and Technology, 20190918)In this paper, an approach is presented for finding the optimal longrange space rendezvous in terms of fuel and time, considering limited impulse. In this approach , the Lambert problem is expanded towards a discretized ... 
Analyzing rare event, anomaly, novelty and outlier detection terms under the supervised classification framework
(Artificial Intelligence Review, 20190901)In recent years, a variety of research areas have contributed to a set of related problems with rare event, anomaly, novelty and outlier detection terms as the main actors. These multiple research areas have created a ... 
Singletrajectory spectral analysis of scaled Brownian motion
(New Journal of Physics, 201906)A standard approach to study timedependent stochastic processes is the power spectral density (PSD), an ensembleaveraged property defined as the Fourier transform of the autocorrelation function of the process in the ... 
CrowdCentric Counting via Unsupervised Learning
(2019 IEEE International Conference on Communications Workshops (ICC Workshops), 20190711)Counting targets (people or things) within a monitored area is an important task in emerging wireless applications,including those for smart environments, safety, and security.Conventional devicefree radiobased ...