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Médiathèque Valais

Le Saint-Gothard et le Simplon

Anglade, Eugène

Bruxelles : Ch. et A. Vanderauwera, 1870

Médiathèque Valais

Le tunnel du Simplon

Fooz, G. de

Bruxelles : Impr. de l'économie financière, 1905

Università della Svizzera italiana

From context to system and back : how systems emerge from actors cognitive and social interactions : a system dynamics perspective

Colombo, Gianluca ; Mollona, Edoardo

In this paper, the system is viewed as a construction based on the actors’ cognitive and social interactions. The system is the result of multiple – actor sense making (Weick 1995), but at the same time it orients social sense making. In this process each actor’s point of view is a representation of both the system and the context perceived as pertinent by the actor. In other words, the...

Université de Fribourg

Eine statistische Methode zur Erkennung von Dokumentstrukturen

Brugger, Rolf ; Ingold, Rolf (Dir.)

Thèse de doctorat : Université de Fribourg : 1999 ; Nr. 1251.

This PhD thesis is on the topic of document recognition. It particularly discusses the aspects of learning document models and the recognition of the logical structure of documents. In order to achieve high reliability and user friendliness, we describe an interactive system which can easily be adapted to new document classes. In an initial learning session the system is able to generate a...

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...

Université de Fribourg

Une approche uniforme pour la reconnaissance de la structure physique de documents composites fondée sur l'analyse des espaces

Azokly, Antoine Sourou ; Ingold, Rolf (Dir.) ; Stamon, Georges (Codir.)

Thèse de doctorat : Université de Fribourg : 1995 ; 1105.

We present in this thesis a uniform approach to recognize the physical structure of printed documents that may contain various kinds of blocks: we call such documents composite documents. After an introduction to the subject of this thesis, we present first the state of the art in the field of document recognition. In this part, we present models and standards used to represent document...

Université de Fribourg

Argumentation systems and belief functions

Lehmann, Norbert ; Kohlas, Jürg (Dir.) ; Moral, Serafin (Codir.)

Thèse de doctorat : Université de Fribourg : 2001 ; 1340.

Uncertain knowledge can be represented in the framework of argumentation systems. In this framework, uncertainty is expressed using so-called assumptions. Depending on the setting of the assumptions, a given hypothesis of interest can be proved or falsified. The main goal of assumption-based reasoning is to determine the set of all supporting arguments for a given hypothesis. Such a supporting...

Université de Fribourg

Content-based image retrieval using hand-drawn sketches and local features : a study on visual dissimilarity

Banfi, Folco ; Ingold, Rolf (Dir.)

Thèse de doctorat : Université de Fribourg : 2000 ; no 1312.

This thesis addresses the question of content-based image retrieval (CBIR) in heterogeneous databases. In an analysis of the existing CBIR tools that was done at the beginning of this work, we have shown that there was room for improvement in three key areas: query form, image and query representation, and computation of similarity. This analysis led us to studying the usability of a method for...