Letteratura scientifica selezionata sul tema "Efficacité calculatoire"
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Tesi sul tema "Efficacité calculatoire":
Bateni, Amir-Hossein. "Contributions to robust estimation : minimax optimality vs. computational tractability". Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAG004.
In statistics and learning theory, it is common to assume that samples are independently and identically distributed according to a reference probability distribution. A more realistic approach could be to relax this assumption by allowing a fraction of samples to not necessarily follow the reference distribution. These disobeying samples, called outliers, may drastically skew the classical estimators. In this work, we aim to estimate the mean of reference distributions by estimators robust to outliers. We are interested in the non-asymptotic behavior of the estimators. At the first stage, we describe various contamination models which determine the nature of the outliers among our observations. Then, we consider the problem of estimating the mean of a distribution supported by the k-dimensional probability simplex in the setting where an fraction of observations are outliers generated by an adversary. A simple particular example is the problem of estimating the distribution of a discrete random variable. At the second stage, we study the problem of robust estimation of the mean of a Gaussian distribution. The known minimax-optimal estimators for this problem are not computationally tractable. We introduce a computationally efficient estimator based on spectral dimension reduction and establish a finite sample upper bound on its error that is minimax-optimal up to a logarithmic factor
Delespierre, Tiba. "Etude de cas sur architectures à mémoires distribuées : une maquette systolique programmable et l'hypercube d'Intel". Paris 9, 1987. https://portail.bu.dauphine.fr/fileviewer/index.php?doc=1987PA090073.
Libri sul tema "Efficacité calculatoire":
Powell, Guy R. Marketing calculator: Measuring and managing return on marketing investment. Singapore: John Wiley & Sons (Asia), 2008.
Powell, Guy R. Marketing Calculator. Wiley & Sons, Incorporated, John, 2014.
Powell, Guy R. Marketing Calculator: Measuring and Managing Return on Marketing Investment. Wiley & Sons, Incorporated, John, 2012.
Powell, Guy R. Marketing Calculator: Measuring and Managing Return on Marketing Investment. Wiley & Sons, Incorporated, John, 2012.
Powell, Guy R. Marketing Calculator: Measuring and Managing Return on Marketing Investment. Wiley & Sons, Incorporated, John, 2012.