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- W2094882095 abstract "Proportional data (normalized histograms) have been frequently occurring in various areas, and they could be mathematically abstracted as points residing in a geometric simplex. A proper distance metric on this simplex is of importance in many applications including classification and information retrieval. In this paper, we develop a novel framework to learn an optimal metric on the simplex. Major features of our approach include: 1) its flexibility to handle correlations among bins/dimensions; 2) widespread applicability without being limited to ad hoc backgrounds; and 3) a real global solution in contrast to existing traditional local approaches. The technical essence of our approach is to fit a parametric distribution to the observed empirical data in the simplex. The distribution is parameterized by affinities between simplex vertices, which is learned via maximizing likelihood of observed data. Then, these affinities induce a metric on the simplex, defined as the earth mover's distance equipped with ground distances derived from simplex vertex affinities." @default.
- W2094882095 created "2016-06-24" @default.
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- W2094882095 date "2007-06-20" @default.
- W2094882095 modified "2023-09-26" @default.
- W2094882095 title "Dirichlet aggregation" @default.
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- W2094882095 doi "https://doi.org/10.1145/1273496.1273617" @default.
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