Articles publicats Departament d'Informàtica, Matemàtica Aplicada i Estadística: Recent submissions
Now showing items 41-60 of 441
Efficient multiple bichromatic mutual nearest neighbor query processing
In this paper we propose, motivate and solve multiple bichromatic mutual nearest neighbor queries in the plane considering multiplicative weighted Euclidean distances. Given two sets of facilities of different types, a ...
Exploring the Relationship between two Compositions using Canonical Correlation Analys
The aim of this article is to describe a method for relating two compositions which combines compositional data analysis and canonical correlation analysis (CCA), and to examine its main statistical properties. We use ...
Cognition of Industrial Innovation in Latin America: Advances and Challenges
This paper makes a comparative study and relational levels and technological advances that lead society to a more efficient use of productive resources and transform new ideas into viable solutions through products and ...
Energy-saving light positioning using heuristic search
A new definition is given to the problem of light positioning in a closed environment, aiming at obtaining, for a global illumination radiosity solution, the position and emission power for a given number of lights that ...
Real-Time Solar Exposure Simulation in Complex Cities
In urban design, estimating solar exposure on complex city models is crucial but existing solutions typically focus on simplified building models and are too demanding in terms of memory and computational time. In this ...
On the overlap area of a disk and a piecewise circular domain
We provide an approach to solve the problem of locating a disk so that its overlap area with a piecewise circular domain is near-optimal when considering partial converage. To this purpose, we introduce the concept of ...
Anàlisis del modelo de la telaraña en contexto de incertidumbre
In the present work the behavior of a model acquaintance of market is analyzed with an only one, in that is considered that the parameters that tie the variables that it incorporates the pattern come expressed through ...
Topological and algebraic reducibility for patterns on trees
We extend the classical notion of block structure for periodic orbits of interval maps to the setting of tree maps and study the algebraic properties of the Markov matrix of a periodic tree pattern having a block structure. ...
On strictly convex central configurations of the 2n-body problem
We consider planar central configurations of the Newtonian 2n-body problem consisting in two twisted regular n-gons of equal masses. We prove the conjecture that for n≥5 all convex central configurations of two twisted ...
Interactive Applications for Sketch-Based Editable Polycube Map
In this paper, we propose a sketch-based editable polycube mapping method that, given a general mesh and a simple polycube that coarsely resembles the shape of the object, plus sketched features indicating relevant ...
Análisis composicional de datos en Ciencias Geoambientales
Compositional data (concentrations) are common in geosciences. Neglecting its character mey lead to erroneous conclusions. Spurious correlation (K. Pearson, 1897) has disastrous consequences. On the basis of the pioneering ...
Color Channel Compensation (3C): A Fundamental Pre-Processing Step for Image Enhancement
This article introduces a novel solution to improve image enhancement in terms of color appearance. Our approach, called Color Channel Compensation (3C), overcomes artifacts resulting from the severely non-uniform color ...
A Bounded Measure for Estimating the Benefit of Visualization (Part I): Theoretical Discourse and Conceptual Evaluation
Information theory can be used to analyze the cost-benefit of visualization processes. However, the current measure of benefit contains an unbounded term that is neither easy to estimate nor intuitive to interpret. In this ...
Efficient inverse lighting: A statistical approach
Given a scene to illuminate satisfying a specific set of lighting intentions, the inverse lighting techniques allow us to obtain the unknown light source parameters, such as light position or flux emission. This paper ...
A bootstrap estimation scheme for chemical compositional data with nondetects
The bootstrap method is commonly used to estimate the distribution of estimators and their associated uncertainty when explicit analytic expressions are not available or are difficult to obtain. It has been widely applied ...
Effective Local Backscattering Estimation for Underwater Image Enhancement
L'H2020 712949 está vinculat amb el programa ACCIO (Agència per a la Competitivitat de la Empresa). Programa ACCIÓ per fomentar la mobilitat d'investigadors amb un enfocament en la recerca aplicada i la transferència de tecnologia
Pseudo-heteroclinic connections between bicircular restricted four-body problems
In this paper, we show a mechanism to explain transport from the outer to the inner Solar system. Such a mechanism is based on dynamical systems theory. More concretely, we consider a sequence of uncoupled bicircular ...
Influence of heterogeneous age-group contact patterns on critical vaccination rates for herd immunity to SARS-CoV-2
Currently, several western countries have more than half of their population fully vaccinated against COVID-19. At the same time, some of them are experiencing a fourth or even a fifth wave of cases, most of them concentrated ...
Using a route planner to optimize door-to-door visits for a pediatric home-hospitalization program: Feasibility study
Background: Hospital Sant Joan de Déu (Barcelona) initiated a pediatric acute home-hospitalization program. Due to high patient turnover and the health staff's lack of planning training, daily scheduling was a time-consuming ...
Compositional Data Analysis in Time-Use Epidemiology: What, Why, How
In recent years, the focus of activity behavior research has shifted away from univariate paradigms (e.g., physical activity, sedentary behavior and sleep) to a 24-h time-use paradigm that integrates all daily activity ...
