8 Tesi di dottorato

8 Tesi di dottorato: [475] Home page macrotipologia

Sfoglia

8.1 Tesi di dottorato 475

Prodotti recenti

Thermoelastic and Fracture Responses of Periodic Materials: Theory and Applications to Laminates and Triply Periodic Minimal Surfaces

In order to provide better quality on a variety of equipment, services and new technologies to the community, periodic materials as laminates and periodic structures as foams are constantly gaining more attention world- wide, due to the fact that these structures present suitable mechanical behaviours, enhanced physical properties and are yet low-cost. There- fore, it is crucial to understand how these structures respond for different physical and mechanical problems. The present thesis ex...

A multi-site image-based data sharing initiative to assess structural brain changes in large cohorts of early and late blind individuals

Blindness is a widely studied phenomena in order to under- stand the neuroplasticity in case of sensory deprivation. Num- ber of studies focusing on the structural plasticity during vi- sual deprivation is fewer compared to the functional plastic- ity. In addition, samples and the results of those studies are heterogeneous. This dissertation utilized the largest dataset of MRI of blind subjects, that is gathered by the efforts of 10 different research labs. The aim was to overcome the previ...

Essays on Firms’ Competitiveness

As competition becomes intense, firms seek strategies to keep afloat. Among others, they carefully choose their activity lo- cation, recruit a talented workforce, and engage in innova- tion. In this thesis, we shed light on these three features em- pirically, mainly using econometric techniques. Our contri- bution is in the literature of firms’ competitiveness, industrial organization and economic geography. At first, we study regional productivity disparities and their interplay with local...

Cohesive and Variational Methods for Fracture Mechanics in Statics and Fatigue

The widespread use of material over the past century has dramatically changed the world today. The reliability of any machine depends on the multiple com- plex interactions in the system leading to a failure. Hence, it is necessary to understand the failure mechanism of the structures with a multi-physics inter- action. The present thesis explores the role of complex multi-physics in failure to understand the overall structural performance, including an interface between different material...

Learning optimal control policies from data: a partially model-based actor-only approach

This dissertation presents new algorithms for learning optimal feed- back controllers directly from experimental data, considering the plant to be controlled as a black-box source of streaming input and output data. The presented methods fall in the Reinforcement Learning “actor-only” family of algorithms, employing a represen- tation (policy parameterization) of the controller as a function of the feedback values and of a set of parameters to be tuned. The optimization of a policy paramet...

Scopri

Accesso al fulltext

open375
reserved54
embargoed37
no fulltext9