Universitat Politècnica de Catalunya
Now showing items 1966-1985 of 5477
Introduction of wireless communications systems in railway communications are at the origin of this thesis. Ifercat, the company in charge of the development of Línia 9 of Barcelona Metro, decided that wireless systems ...
Els models computacionals del cor són una eina important que pot donar als investigadors biomèdics una font addicional d’informació per entendre el funcionament del miocardi. Els models numèrics poden ajudar a interpretar ...
One of the grand challenges of modern science is to image chemical reactions and biological functions while they are taking place. To realize these molecular movie, experimental techniques need to resolve the relevant ...
The photosynthesis is the process used by the plants and bacteria cells to convert the inorganic matter in organic thanks to the light energy. This process consist on several steps, being one of them the plastoquinone-9 ...
The study of crystalline materials has played a prominent role in solid state physics, whose basic theories were formulated for crystalline matter. However, disordered materials are more abundant in nature than crystalline ...
The thesis presented is performed with the aim of studying the effect of electropulses (EPs) in machining processes such as drilling and round turning processes for different materials. When the EPs of short duration are ...
This thesis presents a study on the variation of the mechanical properties of some materials. These variations are registered for processes as bottom bending, wire drawing or round turning, which are performed under high ...
En aquesta tesi s’estudien diverses tècniques per a la decoloració d’efluents de tintura amb colorants reactius i per a la reutilització dels efluents decolorats en noves tintures. Les tècniques utilitzades per eliminar ...
Amb aquest treball es preté comprovar la universalitat de la relació estequiomètrica de Redfield i recercar patrons consistents de les desviacions d'aquesta raó promig en ambients oligotrofics. Per tal de dur a terme aquest ...
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 ...
