Publications

Displaying 551 - 575 of 1307

Publication	Date
KETpic-Matlab Toolbox for LaTeX High-Quality Graphical Artwork in Educational Materials on Bézier Curve Algorithms at a Master Level Authors: Akemi Gálvez,Akemi Gálvez,Javier Del Ser,Javier Del Ser,Andrés Iglesias,Andrés Iglesias,Setsuo Takato,Masataka Kaneko This paper introduces a new toolbox to generate high-quality graphical artwork about the main algorithms for Bézier curves and related topics. The package has been implemented by the authors as a supporting middleware tool to generate educational materials for a computer-aided geometric design (… Springer International Publishing	2017-01-01
Solving Strategy Board Games using a CSP-based ACO Approach Authors: Antonio Gonzalez-Pardo,Javier Del Ser,David Camacho In the last years, there have been a huge increase in the number of research contributions that use games and video-games as an application domain for testing different artificial intelligence algorithms. Some of these problems can be represented as a constraint satisfaction problem (CSP), and… Inderscience Publishers	2017-01-01
Output-only identification of rigid body motions of floating structures: a case study Authors: Ruzzo, C.,Failla, G.,Collu, Maurizio,Nava, V.,Fiamma, V.,Arena, Felice In order to identify rigid body motions of floating offshore structures, output-only techniques are very useful for developing low-cost intermediate-scale experimental activities directly into the sea, instead of wave tanks. A crucial parameter, however, is the length of the response records used… Elsevier BV	2017-01-01
A Meta-heuristic Learning Approach for the Non-Intrusive Detection of Impersonation Attacks in Social Networks Authors: Miren Nekane Bilbao,Javier Del Ser,Sancho Salcedo-Sanz,Esther Villar-Rodriguez,Sergio Gil-Lopez Cyber attacks have recently gained momentum in the research community as a sharply concerning phenomenon further ignited by the proliferation of social networks, which unfold a variety of ways for cybercriminals to access compromised information of their users. This paper gravitates on… Inderscience Publishers	2017-01-01
The Weighted Independent Domination Problem: ILP Model and Algorithmic Approaches Authors: Pedro Pinacho Davidson,Pedro Pinacho Davidson,Christian Blum,Jose A. Lozano,Jose A. Lozano This work deals with the so-called weighted independent domination problem, which is an N P -hard combinatorial optimization problem in graphs. In contrast to previous theoretical work from the liter- ature, this paper considers the problem from an algorithmic perspective. The first contribution… Springer International Publishing	2017-01-01
On the Creation of Diverse Ensembles for Nonstationary Environments Using Bio-inspired Heuristics Authors: Lobo, J.L.,Del Ser, J.,Villar-Rodriguez, E.,Salcedo-Sanz, S.,Bilbao, M.N. Recently the relevance of adaptive models for dynamic data environments has turned into a hot topic due to the vast number of sce- narios generating nonstationary data streams. When a change (concept drift) in data distribution occurs, the ensembles of models trained over these data sources are… Springer Singapore	2017-01-01
Optimal Phase Swapping in Low Voltage Distribution Networks Based on Smart Meter Data and Optimization Heuristics Authors: Mendia, Izaskun,Gil-López, Sergio,Del Ser, Javier,Bordagaray, Ana González,Prado, Jesús García,Vélez, Manuel In this paper a modified version of the Harmony Search algorithm is proposed as a novel tool for phase swapping in Low Voltage Distribution Networks where the objective is to determine to which phase each load should be connected in order to reduce the unbalance when all phases are added into the… Springer Singapore	2017-01-01
Joint Feature Selection and Parameter Tuning for Short-Term Traffic Flow Forecasting Based on Heuristically Optimized Multi-layer Neural Networks Authors: Oregi, I.,Del Ser, J.,Laña, I.,Vélez, M. Short-term traffic flow forecasting is a vibrant research topic that has been growing in interest since the late 70’s. In the last decade this vibrant field has shifted its focus towards machine learning methods. These techniques often require fine-grained parameter tuning to obtain satisfactory… Springer Singapore	2017-01-01
A Grouping Harmony Search Algorithm for Assigning Resources to Users in WCDMA Mobile Networks Authors: Aybar-Ruiz, A.,Cuadra, L.,Salcedo-Sanz, S.,Portilla-Figueras, J.A.,Del Ser, J. This paper explores the feasibility of a particular implemen- tation of a Grouping Harmony Search (GHS) algorithm to assign re- sources (codes, aggregate capacity, power) to users in Wide-band Code Division Multiple Access (WCDMA) networks. We use a problem for- mulation that takes into account a… Springer Singapore	2017-01-01
A meta-heuristic learning approach for the non-intrusive detection of impersonation attacks in social networks Authors: Miren Nekane Bilbao,Javier Del Ser,Sancho Salcedo-Sanz,Esther Villar-Rodriguez,Sergio Gil-Lopez Cyber attacks have recently gained momentum in the research community as a sharply concerning phenomenon further ignited by the proliferation of social networks, which unfold a variety of ways for cybercriminals to access compromised information of their users. This paper gravitates on… Inderscience Publishers	2017-01-01
A Novel Grouping Harmony Search Algorithm for Clustering Problems Authors: Landa-Torres, I.,Del Ser, J.,Manjarres, D.,Gil-Lopez, S.,Salcedo-Sanz, S. The problem of partitioning a data set into disjoint groups or clusters of related items plays a key role in data analytics, in particular when the information retrieval becomes crucial for further data analysis. In this context, clustering approaches aim at obtaining a good parti- tion of the data… Springer Singapore	2017-01-01
Learning bilingual word embeddings with (almost) no bilingual data Authors: Artetxe Zurutuza, Mikel,Labaka Intxauspe, Gorka,Agirre Bengoa, Eneko Most methods to learn bilingual word embeddings rely on large parallel corpora, which is difficult to obtain for most language pairs. This has motivated an active research line to relax this requirement, with methods that use document-aligned corpora or bilingual dictionaries of a few thousand… Association for Computational Linguistics (ACL)	2017-01-01
A source time reversal method for seismicity induced by mining Authors: Brevis, Rodrigo I.,Ortega Palma, Jaime,Pardo, David In this work, we present a modified Time-Reversal Mirror (TRM) Method, called Source Time Reversal (STR), to find the spatial distribution of a seismic source induced by mining activity. This methodology is based on a known full description of the temporal dependence of the source, the Duhamel's… American Institute of Mathematical Sciences (AIMS)	2017-01-01
Quantitative Analysis and Performance Study of Ant Colony Optimization Models Applied to Multi-mode Resource Constraint Project Scheduling Problems Authors: Gonzalez-Pardo, A.,Del Ser, J.,Camacho, D. Constraint Satisfaction Problems (CSP) belongs to this kind of traditional NP-hard problems with a high impact in both, research and industrial domains. However, due to the complexity that CSP problems exhibit, researchers are forced to use heuristic algorithms for solving the problems in a… Springer Singapore	2017-01-01
Cost-Efficient Selective Network Caching in Large-Area Vehicular Networks Using Multi-objective Heuristics Authors: Cristina Perfecto,Javier Del Ser,Javier Del Ser,Miren Nekane Bilbao In the last decade the interest around network caching tech- niques has augmented notably for alleviating the ever-growing demand of resources by end users in mobile networks. This gained momentum stems from the fact that even though the overall volume of traffic re- trieved from Internet has… Springer Singapore	2017-01-01
Dimensionally adaptive hp-finite element simulation and inversion of 2D magnetotelluric measurements Authors: David Pardo,David Pardo,David Pardo,Julen Álvarez-Aramberri Magnetotelluric (MT) problems often contain different subdomains where the conductivity of the media depends upon one, two, or three spatial variables. Traditionally, when a MT problem incorporates a three-dimensional (3D) subdomain, the numerical method employed for simulation and inversion was 3D… Elsevier BV	2017-01-01
Sample Size Impact on the Categorisation of Continuous Variables in Clinical Prediction Authors: Inmaculada Arostegui,María Xosé Rodríguez-Álvarez,Irantzu Barrio MINECO: MTM2011-28285-C02-01, MTM2013-40941-P, MTM2014-55966-P. Basque Government: IT620-13. University of the Basque Country UPV/EHU: UFI11/52 Agrupamento INBIOMED from DXPCTSUG-FEDER unha maneira de facer Europa (2012/273). Springer International Publishing	2017-01-01
Wireless Network Optimization for Massive V2I Data Collection Using Multiobjective Harmony Search Heuristics Authors: Sobron, I.,Alonso, B.,Del Ser, J.,Vélez, M. This paper proposes to improve the efficiency of the deploy- ment of wireless network infrastructure for massive data collection from vehicles over regional areas. The increase in the devices that are carried by vehicles makes it especially interesting being able to gain access to that data. From a… Springer Singapore	2017-01-01
Semisupervised Multiclass Classification Problems With Scarcity of Labeled Data: A Theoretical Study Authors: Jose A. Lozano,Iñaki Inza,Jonathan Ortigosa-Hernández In recent years, the performance of semisupervised learning (SSL) has been theoretically investigated. However, most of this theoretical development has focused on binary classification problems. In this paper, we take it a step further by extending the work of Castelli and Cover to the multiclass… Institute of Electrical and Electronics Engineers (IEEE)	2016-12-01
The value of agent-based modelling for assessing tourism–environment interactions in the Anthropocene Authors: Amelung, Bas,Student, Jillian,Nicholls, Sarah,Lamers, Machiel,Baggio, Rodolfo,Boavida-Portugal, Ines,Johnson, Peter,de Jong, Eline,Hofstede, Gert Jan,Pons, Marc,Steiger, Robert,Balbi, Stefano Tourism is one of the prime manifestations of the ‘great acceleration of humankind’ since the Anthropocene started around 1950. The almost 50-fold increase in international tourism arrivals has substantial implications for environmental sustainability, but these have not yet been fully explored.… Elsevier BV	2016-12-01
VENUS CLOUD MORPHOLOGY AND MOTIONS FROM GROUND-BASED IMAGES AT THE TIME OF THE AKATSUKI ORBIT INSERTION^∗ Authors: Javier Peralta,I. Mendikoa,Jose Félix Rojas,Agustín Sánchez-Lavega,Takeshi Horinouchi,R. Hueso,Shigeto Watanabe,Josep M. Gomez-Forrellad,Santiago Pérez-Hoyos,Yeon Joo Lee ABSTRACT We report Venus image observations around the two maximum elongations of the planet at 2015 June and October. From these images we describe the global atmospheric dynamics and cloud morphology in the planet before the arrival of JAXA’s Akatsuki mission on 2015 December 7.… American Astronomical Society	2016-12-01
Adaptive multi-stage integrators for optimal energy conservation in molecular simulations Authors: Jesús María Sanz-Serna,Elena Akhmatskaya,Elena Akhmatskaya,Mario Fernández-Pendás We introduce a new Adaptive Integration Approach (AIA) to be used in a wide range of molecular simulations. Given a simulation problem and a step size, the method automatically chooses the optimal scheme out of an available family of numerical integrators. Although we focus on two-stage splitting… Elsevier BV	2016-12-01
Simple or complicated agent-based models? A complicated issue Authors: Zhanli Sun,Iris Lorscheid,James D. Millington,Steffen Lauf,Nicholas R. Magliocca,Jürgen Groeneveld,Stefano Balbi,Henning Nolzen,Birgit Müller,Jule Schulze,Carsten M. Buchmann Agent-based models (ABMs) are increasingly recognized as valuable tools in modelling human-environmental systems, but challenges and critics remain. One pressing challenge in the era of Big Data and given the flexibility of representation afforded by ABMs, is identifying the appropriate level of… Elsevier BV	2016-12-01
A simulation-based quantitative analysis on the topological heritability of Dandelion-encoded meta-heuristics for tree optimization problems Authors: Cristina Perfecto,Miren Nekane Bilbao,Javier Del Ser,Armando Ferro The solutions to many optimization paradigms arising from different application domains can be modeled as a tree graph, in such a way that nodes represent the variables to be optimized and edges evince topological relationships between such variables. In these problems the goal is to infer an… Springer Science and Business Media LLC	2016-11-11
An enduring rapidly moving storm as a guide to Saturn’s Equatorial jet’s complex structure Authors: Sánchez-Lavega, A.,García-Melendo, E.,Perez-Hoyos, S.,Hueso, R.,Wong, M. H.,Simon, A.,Sanz-Requena, J. F.,Antuñano, A.,Barrado-Izagirre, N.,Garate-Lopez, I.,Rojas, J. F.,Gaztelurrutia, T. del Rio,Gómez-Forrellad, J. M.,de Pater, I.,Li, L.,Barry, T.,… AbstractSaturn has an intense and broad eastward equatorial jet with a complex three-dimensional structure mixed with time variability. The equatorial region experiences strong seasonal insolation variations enhanced by ring shadowing, and three of the six known giant planetary-scale storms have… Springer Science and Business Media LLC	2016-11-08