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Quelques difficultés liées à la soustraction (Partie 1)
décembre 2012, Berlanger, Isabelle; Cuisinier, Ginette; GILBERT, Thérèse; NINOVE, Laure,
- HE Galilée
- HE Léonard de Vinci
,
- Article scientifique
Article scientifique
Cet article a comme point de départ certaines difficultés fondamentales liées à la soustraction, difficultés
auxquelles les enseignants sont confrontés d’année en année et qui les laissent parfois démunis. Nous y rassemblons quelques approches relatives à la soustraction en primaire et au début du secondaire sous forme d’activités, et en proposons une analyse épistémologique. Pour cela, nous avons ...
Rencontre avec la droite mère : un élégant problème d’origami de Kazuo Haga
Article scientifique
Dominant vectors of nonnegative matrices : application to information extraction in large graphs
TFE
Objects such as documents, people, words or utilities, that are related in some way, for instance by citations, friendship, appearance in definitions or physical connections, may be conveniently represented using graphs or networks. An increasing number of such relational databases, as for instance theWorldWideWeb, digital libraries, social networking web
sites or phone calls logs, are available. ...
Multiple equilibria of nonhomogeneous Markov chains and self-validating web rankings
janvier 2008, Akian, Marianne; Gaubert, Stéphane; NINOVE, Laure,
- HE Léonard de Vinci
,
- Article scientifique
Article scientifique
PageRank is a ranking of the web pages that measures how often a given web page is visited by a random surfer on the web graph, for a simple model of web surfing. It seems realistic that PageRank may also have an influence on the behavior of web surfers. We propose here a simple model taking into account the mutual influence between web ranking and web surfing. Our ranking, the T-PageRank, is a ...
Maximizing PageRank via outlinks
2008, de Kerchove, Cristobald; NINOVE, Laure; Van Dooren, Paul,
- HE Léonard de Vinci
,
- Article scientifique
Article scientifique
We analyze linkage strategies for a set of webpages for which the webmaster wants to maximize the sum of Google’s PageRank scores. The webmaster can only choose the hyperlinks starting from the webpages of and has no control on the hyperlinks from other webpages. We provide an optimal linkage strategy under some reasonable assumptions.
The T-PageRank : a Model of Self-Validating Effects of Web Surfing
Article scientifique
Affine iterations on nonnegative vectors
2004, Blondel, Vincent; NINOVE, Laure; Van Dooren, Paul,
- HE Louvain en Hainaut
,
- Article scientifique
Article scientifique