Now showing items 1-20 of 192

• #### A comparative analysis of mathematical models for relating indoor and outdoor toxic gas concentrations in accidental releases ﻿

(2009-04)
Article
Restricted access - publisher's policy
This paper surveys various models for estimating indoor concentration as a function of outdoor concentration in the event of an accidental release or chemical attack involving toxic substances. It is essential to know ...
• #### A GEE moving average analysis of the relationship between air pollution and mortality for asthma in Barcelona, Spain ﻿

(1999-08)
Article
Restricted access - publisher's policy
Several studies have assessed the association between air pollution and hospital admissions or emergency room visits for asthma. Because of both the presence of missing data and the small number of observations, the ...
• #### A general framework for softening regularisation based on gradient elasticity ﻿

(2011-05-01)
Article
Open Access
A general non-local approach to regularise strain-softening continua is presented. The key idea is to introduce the gradient-type enrichment at the level of displacements (rather than some internal variable), so the model ...
• #### A generalization of the Caginalp phase-field system based on the Cattaneo law ﻿

(Elsevier, 2009)
Article
Restricted access - publisher's policy
We consider in this article a generalization of the Caginalp model for phase transitions based on the Maxwell Cattaneo law, instead of the classical Fourier law. In particular, we prove the existence and uniqueness of ...
• #### A mathematical model for dynamic memory networks ﻿

(Iniciativa Digital Politècnica, 2011)
Conference report
Open Access
The aim of this paper is to bring together the work done several years ago by M.A. Fiol and the other authors to formulate a quite general mathematical model for a kind of permutation networks known as dynamic memories. A ...
• #### A mathematical model of carbon capture by adsorption ﻿

(2021-08-02)
Part of book or chapter of book
Restricted access - publisher's policy
We present a model to describe the capture of carbon by an adsorbing porous material occupying a circular cross-section column. The model consists of an advection-reaction-diffusion equation for the gas concentration coupled ...
• #### A mathematical perspective on how test-type exams are evaluated ﻿

(2020)
Conference report
Restricted access - confidentiality agreement
Typically, the test type exams with binary answers (true / false) are corrected by adding a +1 to the correct answers, a -1 to the incorrect ones and 0 to non-answered questions. This mainly obeys to a purely statistic ...
• #### A microfluidics and agent-based modeling framework for investigating spatial organization in bacterial colonies: the case of Pseudomonas Aeruginosa and H1-Type VI secretion interactions ﻿

(2018-02-06)
Article
Open Access
The factors leading to changes in the organization of microbial assemblages at fine spatial scales are not well characterized or understood. However, they are expected to guide the succession of community development and ...
• #### A new structured mathematical model of the composting process ﻿

(2004)
Conference lecture
Open Access
• #### A novel approach for hybrid performance modelling and prediction of large-scale computing systems ﻿

(2009)
Article
Restricted access - publisher's policy
We present a novel approach for hybrid performance modeling and prediction of large-scale parallel and distributed computing systems, which combines mathematical modeling and discrete-event simulation. We use mathematical ...
• #### A novel model to predict a slap avalanche configuration using m:n-CAk cellular automata ﻿

(Elsevier, 2010-08-23)
Article
Restricted access - publisher's policy
The paper introduces a novel method to represent slap avalanche phenomena. The model is based on a cellular automaton generalization named m:n-$CA^k$. This generalization allows the use of different layers in a single ...
• #### A recursive LMI-based algorithm for efficient vertex reduction in LPV systems ﻿

(2021-01-01)
Article
Open Access
This paper proposes a new algorithm to reduce the number of gains of a polytopic LPV controller considering generic tuples of vertices, for which a common controller gain can be used. The use of Frobenius norm and the ...
• #### A simple discrete simulation model to explore in the classroom some rules involved in the decision-making process: the cellular automata ﻿

(2013)
Article
Restricted access - publisher's policy
The aim of this contribution is to pr esent teaching material elaborated to work with a very simple discrete model, the cellular automata called “Voting” (free access from the social science section of NetLogo ...
• #### Advanced Spatial Temporal Regularization for Inverse Electrocardiography (ECG) ﻿

(Universitat Politècnica de Catalunya, 2014-07-23)
Bachelor thesis
Open Access
Covenantee:   Northeastern University
[ANGLÈS] Heart diseases are the first cause of Mortality in the world. The percentage of the deceased who dies because of a cardiac infarction rises every year. Therefore, an early identification of typical signs may be ...
• #### Algorithms for three-dimensional atmospheric simulations ﻿

(Universitat Politècnica de Catalunya, 2021-09-28)
Master thesis
Open Access
In this project, an atmospheric model based on the Navier-Stokes equations and the incorpo-ration of the Boussinesq’s approximation is introduced. The model is applicable to pseudo-incompressible adiabatic three-dimensional ...
• #### Alternativas para a medida do erro na representação do carregamento no método da superposição de vetores de Lanczos ﻿

(Centro Internacional de Métodos Numéricos en Ingeniería, 1995)
Article
Open Access
O desenvolvimento de um método de reduçáo de coordenadas, que utiliza uma base constituída por vetores de Lanczos gerados a partir da distribuiçáo espacial do carregamento, suposta fixa, é apresentado. O erro relativo na ...
• #### An Approach to enhance efficiency of DEM modelling of soils with crushable grains ﻿

(Thomas Telford, 2015-02)
Article
Open Access
In this study oedometric compression tests of hydrocarbon coke, Fontainebleau sand and silica sand are simulated in three dimensions using breakable particles. The method adapts a rigorous breakage criterion for elasto-brittle ...
• #### An optimization model for the long-term planning of energy distribution networks ﻿

(2016)
Conference lecture
Open Access
Although design is a problem that has been addressed in the literature, maintaining, upgrading and expanding energy distribution networks along the entire life-cycle is a topic that has received scarce attention. The problem ...
• #### Analyses of the coinfection of respiratory viruses using compartmental mathematical models ﻿

(Universitat Politècnica de Catalunya, 2022-07-19)
Bachelor thesis
Open Access
Viral coinfection presented in humans has important value in clinical and epidemiological studies. The relationship between viruses determines the consequences of viral coinfection. These consequences could be inhibition ...
• #### Analysis and assessment of tuberculosis epidemiology dynamics with a compartment based mathematical model ﻿

(Universitat Politècnica de Catalunya, 2016-07-09)
Bachelor thesis
Open Access
Tuberculosis (TB) is an airborne infectious disease caused by Mycobacterium tuberculosis that has co-evolved with humanity. Its strategy for success consists of remaining almost hidden and acting slowly. The Global ...