RÉSUMÉ. Cet article décrit une contrainte d’un modèle de recherche d’information décrivant les comportement attendu d’un système si un document du corpus est posé en requête, la contrainte DDMC (Document-Document Matching Constraint). Cette contrainte n’étant pas vérifiée par un modèle classique de recherche d’information (modèle de langue basé sur un calcul de négative de Divergence de Kullbac...

We present an extensive empirical comparison of several smoothing techniques in the domain of language modeling, including those described by Jelinek and Mer-cer (1980), Katz (1987), and Church and Gale (1991). We investigate for the rst time how factors such as training data size, corpus (e.g., Brown versus Wall Street Journal), and n-gram order (bigram versus trigram) aaect the relative perfo...

This paper present a principled SVM based speaker verification system. We propose a new framework and a new sequence kernel that can make use of any Mercer kernel at the frame level. An extension of the sequence kernel based on the Max operator is also proposed. The new system is compared to state-of-the-art GMM and other SVM based systems found in the literature on the Banca and Polyvar databa...

This paper contributes a tutorial level discussion of some interesting properties of the recent Cauchy–Schwarz (CS) divergence measure between probability density functions. This measure brings together elements from several different machine learning fields, namely information theory, graph theory and Mercer kernel and spectral theory. These connections are revealed when estimating the CS dive...

The trigram-based noisy-channel model of real-word spelling-error correction that was presented by Mays, Damerau, and Mercer in 1991 has never been adequately evaluated or compared with other methods. We analyze the advantages and limitations of the method, and present a new evaluation that enables a meaningful comparison with the WordNet-based method of Hirst and Budanitsky. The trigram method...

It is proven that there is a two-coloring of the first n integers forwhich all arithmetic progressions have discrepancy less than const.n1/4. Thisshows that a 1964 result of K. F. Roth is, up to constants, best possible. Department of Applied Mathematics, Charles University, Malostranské nám. 25,118 00 Praha 1, Czech RepublicE-mail address: [email protected] Courant Insti...

Recent studies suggest that atmospheric wind bursts in the tropical Pacific have played a major role during the 2014-2016 period marked by a failed El Niño favoring a subsequent super El Niño with dramatic worldwide impacts. Here we show that this new type of major event or so-called delayed super El Niño is realistically and easily captured by simple dynamical models with emphasis on the role ...

Take a big gulp of pox A poxvirus tricks cells into drinking it up, say Jason Mercer and Ari Helenius (Institute of Biochemistry, Zurich). Vaccinia, studied here, is a prototypical poxvirus, whose members also include the human smallpox virus. In studying how vaccinia enters cells, the authors observed that mature virus particles bound to fi lopodia and surfed toward the cell. After arriving at...

Take a big gulp of pox A poxvirus tricks cells into drinking it up, say Jason Mercer and Ari Helenius (Institute of Biochemistry, Zurich). Vaccinia, studied here, is a prototypical poxvirus, whose members also include the human smallpox virus. In studying how vaccinia enters cells, the authors observed that mature virus particles bound to fi lopodia and surfed toward the cell. After arriving at...


 The current study was motivated by recent interest in the effect of positive and negative emotions context foreign language learning resulting from rise psychology movement (Dewaele & MacIntyre, 2016; MacIntyre Mercer, 2014). It examines construct enjoyment (FLE) its relationship with classroom anxiety (FLCA) among a group 487 English as (EFL) students (340 females, 147 males) enroll...