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Université de Fribourg

2(CREM) : une méthode de reconnaissance structurelle de documents complexes basée sur des patterns bidimensionnels

Robadey, Lyse ; Ingold, Rolf (Dir.) ; Bapst, Frédéric (Codir.)

Thèse de doctorat : Université de Fribourg : 2001 ; No 1364.

This thesis addresses the question of printed document recognition. We studied existing systems, first in a general context, by making the distinction between physical and logical structure recognition systems. Then, we focused on methods specific for complex layout documents and on methods having a learning aptitude. Since there do not seem to exist learning systems which are able to recognise...

Università della Svizzera italiana

Adaptive routing in ad hoc wireless multi-hop networks

Ducatelle, Frederick ; Gambardella, Luca Maria (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2007 ; 2007INFO001.

Ad hoc wireless multi-hop networks (AHWMNs) are communication networks that consist entirely of wireless nodes, placed together in an ad hoc manner, i.e. with minimal prior planning. All nodes have routing capabilities, and forward data packets for other nodes in multi-hop fashion. Nodes can enter or leave the network at any time, and may be mobile, so that the network topology continuously...

Università della Svizzera italiana

Advanced metaheuristics for the probabilistic orienteering problem

Chou, Xiaochen ; Gambardella, Luca Maria (Dir.) ; Montemanni, Roberto (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2020 ; 2020INFO020.

Stochastic Optimization Problems take uncertainty into account. For this reason they are in general more realistic than deterministic ones, meanwhile, more difficult to solve. The challenge is both on modelling and computation aspects: exact methods usually work only for small instances, besides, there are several problems with no closed-form expression or hard- to-compute objective functions....

Università della Svizzera italiana

Advances in barycentric rational interpolation of a function and its derivatives

Cirillo, Emiliano ; Hormann, Kai (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2019 ; 2019INFO007.

Linear barycentric rational interpolants are a particular kind of rational interpolants, defined by weights that are independent of the function f. Such interpolants have recently proved to be a viable alternative to more classical interpolation methods, such as global polynomial interpolants and splines, especially in the equispaced setting. Other kinds of interpolants might indeed suffer...

Università della Svizzera italiana

Advances in deep learning for vision, with applications to industrial inspection : classification, segmentation and morphological extensions

Masci, Jonathan ; Schmidhuber, Jürgen (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2014 ; 2014INFO001.

Learning features for object detection and recognition with deep learning has received increasing attention in the past several years and recently attained widespread popularity. In this PhD thesis we investigate its applications to the automatic surface inspection system of our industrial partner ArcelorMittal, for classification and segmentation problems. Currently employed algorithms, in...

Università della Svizzera italiana

Advances in humanoid control and perception

Stollenga, Marijn Frederik ; Schmidhuber, Jürgen (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2016 ; 2016INFO004.

One day there will be humanoid robots among us doing our boring, time-consuming, or dangerous tasks. They might cook a delicious meal for us or do the groceries. For this to become reality, many advances need to be made to the artificial intelligence of humanoid robots. The ever-increasing available computational processing power opens new doors for such advances. In this thesis we develop...

Università della Svizzera italiana

Agents in superposition

Baumann, Veronika ; Brukner, Caslav (Dir.) ; Wolf, Stefan (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2021 ; 2021INFO010.

The idea of agents in superposition is central to both encapsulated observers, i.e. Wigner’s-friend-type experiments, and correlations without definite causal order. An agent might be regarded as a thinking or computing entity that is able to perform operations on (other) quantum systems. In case of Wigner’s-friend setups, an agent’s ability to make predictions about other agents...

Université de Fribourg

Algebras of gaussian linear information

Eichenberger, Christian ; Kohlas, Jürg (Dir.)

Thèse de doctorat : Université de Fribourg, 2009 ; Nr. 1640.

Gaussian linear information arises in many real-world models of the natural and social sciences. The Gaussian distribution has turned out to appropriately represent uncertainty in many linear models. The main goal of this thesis is to describe and to compare different algebras of Gaussian linear information: Corresponding elements and operations in the various algebras are revealed and the...

Università della Svizzera italiana

Algorithms and complexity results for discrete probabilistic reasoning tasks

Mauá, Denis Deratani ; Schmidhuber, Jürgen (Dir.) ; Zaffalon, Marco (Codir.) ; Polpo de Campos, Cassio (Codir.)

Thèse de doctorat : Università della Svizzera italiana, 2013 ; 2013INFO005.

Many solutions to problems in machine learning and artificial intelligence involve solving a combinatorial optimization problem over discrete variables whose functional dependence is conveniently represented by a graph. This thesis addresses three types of these combinatorial optimization problems, namely, the maximum a posteriori inference in discrete probabilistic graphical models, the...

Università della Svizzera italiana

Analysis and new constructions of generalized barycentric coordinates in 2D

Anisimov, Dmitry ; Hormann, Kai (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2017 ; 2017INFO004.

Different coordinate systems allow to uniquely determine the position of a geometric element in space. In this dissertation, we consider a coordinate system that lets us determine the position of a two-dimensional point in the plane with respect to an arbitrary simple polygon. Coordinates of this system are called generalized barycentric coordinates in 2D and are widely used in computer...