The merits of the modelling philosophy of Box & Jenkins (1970) are illustrated with a summary of our recent work on seasonal river flow forecasting. Specifically, this work demonstrates that the principle of parsimony, which has been questioned by several authors recently, is helpful in selecting the best model for forecasting seasonal river flow. Our work also demonstrates the importance of mo...

L'intervalle de temps variable existante entre le debut du traitement par la prenylamine et la sur­venu de toisade de pointe et d'autre oart la raretee de· telle camplication est considere par les auteurs c0mme une indice de !'intervention de d'autres fac­teurs, parmie Jes quelles, la perturbation electroly­tique doit jouer le role principal. 

– We study translation surfaces with rich groups of affine diffeomorphisms—“prelattice” surfaces. These include the lattice translation surfaces studied by W. Veech. We show that there exist prelattice but nonlattice translation surfaces. We characterize arithmetic surfaces among prelattice surfaces by the infinite cardinality of their set of points periodic under affine diffeomorphisms. We giv...

Autoregressive models are among the best performing neural density estimators. We describe an approach for increasing the flexibility of an autoregressive model, based on modelling the random numbers that the model uses internally when generating data. By constructing a stack of autoregressive models, each modelling the random numbers of the next model in the stack, we obtain a type of normaliz...

This paper introduces a new class of models for non-negative integer-valued time series with periodic and seasonal autoregressive structure. Some properties the model are discussed conditional quasi-maximum likelihood method is used to estimate parameters. The consistency asymptotic normality estimators established. Their performances investigated finite sample sizes empirical results indicate ...

Le terme d'allergiti cree par VON PIRQUET en 1906 designe "l'etat d'un individu qui sensi­bilise a un substance, y reagit ulterieurement d'une facon anormale, c'est a dire exageree (Pasteur Vallery Ra dot).  On distingue schematiquement deux types d'allergie: L'hypersensibilie imme<liat de type humorale et l'hypersensibilite du type retarde ou cellulaire.  Si dans la. clinique, les lesions cu...

Voice over IP (VoIP) applications are now very popular and widely used on the Internet. Such applications use receiver playout buffers to smooth delay variations so as to reconstruct the periodic form of the transmitted packets. Packets arriving after their scheduled playout time are considered late and are not played out. Playout delay control algorithms often operate by updating the playout d...