Universitat Politècnica de Catalunya
Now showing items 44-63 of 99
Distribution of goods is essential for the economic development of cities but at the same time it entails several problems to the urban systems and different stakeholders. Carriers spend a significant portion of their cost ...
La necesidad del análisis de supervivencia aparece cuando necesitamos estudiar las propiedades estadísticas de una variable que describe el tiempo hasta que ocurre un evento único. En algunas ocasiones, podemos observar ...
The objective of the current doctoral thesis is the theoretical and experimental application of Kansei engineering in the field of design. Kansei engineering is a method that aims to develop or improve products, services ...
Los ensayos clínicos son a menudo muy costosos y pueden tener una duración considerable. Un error en el diseño de un ensayo clínico puede implicar la imposibilidad de verificar la hipótesis que se pretendía probar por falta ...
Aquesta tesi tracta sobre tècniques d'anàlisi de supervivència en situacions amb múltiples esdeveniments i patrons complexes de censura. Proposem una nova metodologia per tractar la situació de riscos semi-competitius quan ...
Semiconductor lasers in high-power regime typically manifest a poor beam quality due to its asymmetric beam divergence and its large beam quality factor (M2). The emission along one of the transverse directions (slow axis) ...
Per les seves característiques intrínseques (coexistència de variables quantitatives i qualitatives amb gran nombre de modalitats , coneixement addicional sobre l'estructura del domini per part d'un expert), els dominis ...
Computer modelling and complex systems simulation have dominated the scientific debate over the last decade, providing important outcomes in biology, geology and life sciences. In the social sciences, the number of research ...
This PhD thesis is concerned with evaluating the long-term effects of interventions in the editorial peer review process of a biomedical journal. The growing need to increase the value of research and avoid waste motivates ...
The thesis deals with the theoretical and practical study of mathematical programming methodologies to the analysis complex networks and their application in economic and social problems. More specifically, it applies ...
(English) Searching to achieve an ambitious reduction in greenhouse gas emissions, the European Union has set as a goal a modal shift in freight transport of 30\% by rail or waterborne for the near future. The increasing ...
Editorial peer review is the gateway to scientific publication. It was established to ensure that research papers were vetted by independent experts before they are published. Despite the importance of this process, its ...
The problem addressed in this thesis is the medium-term generation planning over a yearly horizon of a generation company participating in a liberalized electricity market with pool auction of generation and consumption ...
(English) The Internet has changed the way companies sell and users shop. Nowadays, having an online presence is an opportunity, while not doing so is a competitive disadvantage, and companies strive to appear as the first ...
La validación de un cluster sigue siendo un problema abierto por no haberse encontrado aún un criterio objetivo para determinar la calidad de un conjunto de clases en el contexto del clustering. La interpretación de un ...
Tal i com indica el seu títol, la present memòria de tesi té com objecte d'estudi el desenvolupament d'algorismes i implementacions eficients per resoldre el problema conegut dins del món de l'Optimització i Investigació ...
(English) We are living in an era where the complexity of environmental challenges is unprecedented. Biodiversity loss, habitat degradation, and climate change are interconnected issues requiring a comprehensive and ...
When collecting survey data for a specific study it is usual to have some background information, in the form for example, of socio-demographic variables. In our context, these variables may be useful in identifying potential ...
Esta tesis se centra en el estudio de la serie temporal de volatilidades asociada a la rentabilidad de las acciones a partir de un modelo no lineal, el modelo SETAR "Self-Exciting Threshold AutoRegressive model". <br/>El ...
The most common decisions to be taken in the design of logistic systems are related to the location of facilities and the management of vehicle fleets.<br><br/>In this thesis, we study three of the optimization problems ...
