Universitat Politècnica de Catalunya
Now showing items 1975-1994 of 5479
Se proponen nuevos elementos finitos para problemas en mecánica de sólidos en el marco de una formulación estabilizada novedosa en este ámbito. Esta formulación se basa en el método de las sub-escalas, y particularmente ...
The objective of this thesis is to develop and evaluate a methodology for the solution of the Navier-Stokes equations for Bingham Herschel-Bulkley viscoplastic fluids using stabilized mixed velocity/pressure finite elements. ...
Els sistemes absorbidors basats en l'efecte venturi (venturi 'scrubbers') han estat utilitzats tradicionalment per a l'eliminació de partícules i aerosols continguts en efluents gasosos. L'aplicació d'aquesta tecnologia a ...
In the current energy crisis and climate change context, energy use of biogas has gained relevance, since it is possible to get energy from waste, and also minimizes the emission of methane into the atmosphere. However, ...
El objetivo principal de esta tesis doctoral es profundizar en el conocimiento de los procesos biológicos responsables de la eliminación simultánea de nitrógeno y fósforo en un ARU de baja carga orgánica, mediante un reactor ...
Los objetivos de esta tesis doctoral son la caracterización de un agua residual urbana, la prefermentación del agua residual y la optimización de la eliminación biológica de nutrientes en el tratamiento del agua residual ...
This thesis is based on the study of colour elimination of textile effluents which contain reactive dyes. Reactive dyes are widely used in the dyeing of cotton and other cellulosic fibre. However they exhibit a low degree ...
La síntesis de tensión alterna a partir de continua mediante la generación de señales de modulación de anchura de pulsos (PWM) representa un método económico y eficaz de realización de dicha transformación, ya que se ...
The increasing use of DC electronic devices connected to mains lead to numerous complications of harmonic distortion and efficiency reduction in electrical energy transmission. These devices behave as a marked non linear ...
The thesis is divided into two parts. The first part is mainly concerned with regularity issues for integro-differential (or nonlocal) elliptic and parabolic equations. In the same way that densities of particles with ...
(English) This PhD dissertation deals with qualitative questions from the theory of elliptic Partial Differential Equations (PDE) and integro-differential equations. We are primarily interested in a distinguished class of ...
Polarization gating imaging is a popular and widely used imaging technique in biomedical optics to sense tissues, deeper volumes, and also selectively probe sub-superficial volumes. Due to the "polarization memory" effect ...
The lack of housing existing in Spain during post-war period lead Spanish government to implement housing policies with financial support to those projects that meet certain conditions both constructive and cost. Among ...
Ante la situación coyuntural de saturación en que se encuentra la costa brava, se propone un estudio sobre los itinerarios peatonales en las zonas rocosas de la misma, conocidos como caminos de ronda, como elementos ...
La tesi s’organitza en dos volums; el contingut del primer volum és la tesi pròpiament dita, mentre que el segon conté tota la documentació que s’ha fet servir per a la realització de la tesi. El primer volum consta de ...
The purchase management is strategic, being crucial to choose the right suppliers and therefore having the appropriate criteria. In order to make a proposal regarding standardized criteria for selection of suppliers current ...
This thesis aims to develop simple models that allow evaluating the relevance of the principal parameters that condition the energy flows in the ocean-atmosphere system, and how changes in these parameters impact the climate ...
Fa 150 anys que es van crear els estudis d'enginyeria industrial a Espanya amb l'objectiu de donar resposta a la creixent industrialització. Tanmateix, de totes les escoles inicialment creades sols l'Escola d'Enginyeria ...
Public surrenders of land in Spain must receive strong legislative support due to the existence of an eminently private town planning initiative. <br/>Thus, the quantities of facilities, green spaces and areas for road use ...
Aquesta tesi tracta de les possibles aplicacions que puguin tenir els sistemes de simulació física en el camp de l'arquitectura. Aquests mecanismes s'han fet servir profusament en la informàtica ja sigui per a generar ...
