International audienceCall Detail Records (CDRs) are data recorded by telecommunications companies, consisting of basic informations related to several dimensions of the calls made through the network: the source, destination , date and time of calls. CDRs data analysis has received much attention in the recent years since it might reveal valuable information about human behavior. It has shown high added value in many application domains like e.g., communities analysis or network planning. In this paper, we suggest a generic methodology based on data grid models for summarizing information contained in CDRs data. The method is based on a parameter-free estimation of the joint distribution of the variables that describe the calls. We also suggest several well-founded criteria that allows one to browse the summary at various granularities and to explore the summary by means of insightful visualizations. The method handles network graph data, temporal sequence data as well as user mobility data stemming from original CDRs data. We show the relevance of our methodology on real-world CDRs data from Ivory Coast for various case studies, like network planning strategy and yield management pricing strategy
Abstract. When training classifiers, presence of noise can severely harm their performance. In this paper, we focus on "non-class" attribute noise and we consider how a frequent fault-tolerant (FFT) pattern mining task can be used to support noise-tolerant classification. Our method is based on an application independent strategy for feature construction based on the so-called δ-free patterns. Our experiments on noisy training data shows accuracy improvement when using the computed features instead of the original ones.
La distribution d'eau potable dans l'agglomération stéphanoise est restée longtemps caractérisée par la prédominance des régies municipales et par le monopole stéphanois de la ressource en eau auquel échappe cependant la vallée de I Ondaine. Les décisions de la municipalité stéphanoise d'augmenter fortement le prix de l'eau en 1990, puis de concéder la gestion du service des eaux en 1992, ont placé l'eau au cœur du débat politique dans l'agglomération et ont suscité la fronde des communes périphériques. Depuis 1994, les rapports entre la commune-centre et les communes périphériques se sont apaisés mais la question : de l'eau, qui a permis l'affirmation de nouveaux acteurs : S.I.CO.S. (Syndicat intercommunal de la Couronne Stéphanoise), collectif des usagers, société Stéphanoise des Eaux, est loin d'être résolue.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.