Browsing by Subject "625"
Now showing items 1-20 of 73
A mesoscopic traffic simulation based dynamic traffic assignment
In terms of sustainability, traffic is currently a significant challenge for urban areas, where the pollution, congestion and accidents are negative externalities which have strongly impacted the health and economy of ...
Active traffic management in metropolitan freeways : modeling and assessing dynamic speed limit strategies
Traffic congestion is a major source of inefficiencies in metropolitan freeways (e.g. productivity loss, energy waste, pollutant emissions, among other externalities). Active traffic management (ATM) strategies are used ...
An efficient methodology based on two-and-a-half-dimensional finite element and boundary element methods for ground-borne vibration radiated by underground railway tunnels and the re-radiated noise emitted inside them
This thesis presents a methodology for assessing induced ground-borne vibration due to Underground railway infrastructures in the context of an urban environment. The methodology is based on a comprehensive numerical ...
An overnight parcel logistics company's capillary distribution network design by stochastical modeling
In this research, an overnight parcel logistics company's (hereby referred to as OPLC) capillary distribution network will be modelled by stochastic techniques. Specifically, the capillary distribution networks this parcel ...
Analysis and modeling spatiotemporal events on complex spatial regions
Spatial statistics is traditionally based on stationary models like Matérn fields. However, applying stationary models to complex spatial regions having physical barriers like islands or coastal areas can result in ...
Análisis de la evolución de la interoperabilidad y de la seguridad ferroviaria en Europa en el periodo 1991-2011 y propuestas de mejora
The object of this thesis is to analyze the evolution of railway interoperability and safety in Europe in the period 1991-2011. This pretends to assess what has been the legislative process at EU level in the last 20 ...
Análisis de las variables que inciden en la movilidad en vehículos motorizados de dos ruedas en la ciudad de Barcelona
MOBILITY provides accessibility to people, goods, services and information, favoring the implementation of socio-economic activities. The more efficient mobility becomes, the greater human development and quality of life ...
Combination of vehicle routing models and dynamic traffic simulation for city logistics applications
The urban network is a highly dynamic system. Thus, a modern and efficient fleet management in urban areas should account for dynamics of traffic conditions, variability in travel times, changes in demand and fleet ...
Comparison of bus network structures versus urban dispersion : a monocentric analytical approach : evidences from Barcelona's bus network
This thesis discusses which transit network structure is the best option to serve urban mobility. As a consequence of the evolution of urban form, cities have undergone a dispersion process of their activities. This fact ...
Computational aeroacoustics in the automotive industry
The acoustic field inside a car cabin for low driving speeds is dominated by the engine or the tire noise. However, for mid to high velocities, the noise generated by the interaction of the car with the external air becomes ...
Conjoint design of railway lines and frequency setting under semi-congested scenarios
This thesis develops mathematical programming models which integrate network design (ND) and line frequency setting (LFS) phases. These appear in transport planning studies that extend an existing urban public transportation ...
Contribución a la reducción de los costes de mantenimiento de vías de alta velocidad mediante la opitimización de su rigidez vertical
La experiencia adquirida en las líneas de alta velocidad en explotación comercial ha puesto de relieve la importancia de la rigidez vertical de la vía y en particular la conveniencia de limitar su magnitud para minimizar ...
Contribución al diseño eficiente de la configuración en planta de líneas de alta velocidad
Building a high-speed line requires significant investment and its design strongly influences the operation, with the aggravating circumstance that subsequent modifications not initially planned are not always feasible at ...
Contribución al estudio del efecto de la alta velocidad en el consumo de energia y en los costes de explotación del ferrocarril
The thesis analyses the effect of an increase in speed on energy consumption, pollutant emissions and railway operating costs. Besides focusing on the direct consequences of speed variation, the analysis also considers ...
Critical raw materials for electric vehicles and battery technologies: supply risks, impact on the industry and strategic insights
En els darrers anys ha augmentat l'ús de vehicles elèctrics a la indústria de l'automòbil. Per fabricar aquests vehicles calen matèries primeres crítiques, entre les quals destaquen el cobalt, el níquel, el liti i el ...
Desarrollo de tecnologías de baja temperatura para la fabricación de células solares de heterounión de silicio
El desarrollo de la tecnología fotovoltaica de silicio cristalino ha llegado al punto en que la mejora de los dispositivos pasa, no tanto por un aumento de la eficiencia, como por la reducción del coste de fabricación. En ...
Desenvolupament i Caracterització d'un Accionament Rotatiu per a les Potes d'un Robot Caminador. Estudi de l'Eficiència Energètica
Els robots caminadors presenten alguns avantatges respecte als tradicionals robots mòbils amb rodes, que es resumeixen en major mobilitat i capacitat de superació d'obstacles. Un dels principals problemes actuals en el ...
Design, management, and simulation of mixed station-based and free-floating vehicle-sharing systems
(English) This thesis provides tools, based on mathematical modelling, for the analysis, optimization and simulation, of vehicle-sharing systems. The thesis addresses various implementation levels of such systems, from ...
Diseño e Implementación de una Arquitectura Multiagente para la Ayuda a la Toma de Decisiones en un Sistema de Control de Tráfico Urbano
El control de Tráfico Urbano es altamento complejo y dinámico: depende de la cantidad, tipo y calidad de los datos recibidos, de las previsiones de datos a recibir, del comportamiento del tráfico (actual, pasado y en ...
Driving towards sustainability: Decision support tools to guide the energy transition in the transport sector
Aquesta tesi pretén abordar els reptes emergents al sector del transport i facilitar una transició energètica sostenible proporcionant orientacions per a unes polítiques de sostenibilitat eficaces. Tot i els importants ...
