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  • 1. Analyse de l’usage des sytèmesVLS (Velib)pistes et travaux en coursEtienne Côme16/03/2012
  • 2. PlanPlan1 Introduction Données Problématique Statistique globales2 Clustering des stations à partir de la matrice OD3 Clustering des stations à partir de leurs profils d’usage temporel Modèle génératif étudié Analyse des résultats4 Clustering spatio-temporel Approche Générative Autre pistes, factorisation de tenseur ... Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 2 / 54
  • 3. Introduction DonnéesDonnéesDonnées d’usage système VLSDate départ ; Station départ ; Date retour ; Station de retour ; Typeabon.Sources de données Ouvertes : Barclays (Londre) ! Velib, 2 mois 600 mg de fichier texte ! :)MinningDonnées spatio-temporelles riches Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 3 / 54
  • 4. Introduction DonnéesUn mots sur les données VelibVelib en quelques chiffres 1200 stations ≈ 40000 bornes ≈ 16000 vélos ≈ 100 000 trajets/jour 27% trajets = abonnements courte durée 73% trajets = abonnements longue durée Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 4 / 54
  • 5. Introduction ProblématiqueProblématiqueObjectifs finaux mise en oeuvre de nouveaux systèmes : planification des nouveaux systèmes amélioration du service : optimisation des politiques de re-distributionProblématiques modèle de prédiction d’usage recherche de motifs spatio-temporels compréhension des usages Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 5 / 54
  • 6. Introduction Statistique globalesEffets temporels 35000 30000 25000# Trajets 20000 Abonnement : Courte durée 15000 Longue durée 10000 5000 Lundi Mardi Mercredi Jeudi Vendredi Samedi Dimanche Temps Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 6 / 54
  • 7. Introduction Statistique globalesEffets temporels 150000 100000 Trajets 50000 0 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 20h 21h 22h 23h heure de la journée Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 7 / 54
  • 8. Introduction Statistique globalesEffets temporels 60000 50000 40000 Trajets 30000 20000 10000 0 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h 10h 11h 12h 13h 14h 15h 16h 17h 18h 19h 20h 21h 22h 23h heure de la journée Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 8 / 54
  • 9. Introduction Statistique globalesEffets spatiaux q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q indegree q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q 10 q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q 50 q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q 100 q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q 200 q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q qq q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q F IGURE 4: Degrés entrants dans les intervalles [7h,8h] Etienne Côme () Analyse de l’usage des sytèmes VLS (Velib) 16/03/2012 9 / 54
  • 10. Introduction Statistique globalesEffets spatiaux q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q q