Results 41 to 50 of about 22,053,960 (269)
Wasserstein Archetypal Analysis
Applied Mathematics & OptimizationArchetypal analysis is an unsupervised machine learning method that summarizes data using a convex polytope. In its original formulation, for fixed k, the method finds a convex polytope with k vertices, called archetype points, such that the polytope is contained in the convex hull of the data and the mean squared Euclidean distance between the data ...
Katy Craig +3 more
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, 2015 We present an extension of classical archetypal analysis (AA). It is motivated by the observation that classical AA is not invariant against strictly monotone increasing transformations. Establishing such an invariance is desirable since it makes AA independent of the chosen measure: representing a data set in meters or log(meters) should lead to ...
Dinu Kaufmann +2 more
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Archetypal Analysis++ : Rethinking the Initialization Strategy [PDF]
Archetypal analysis is a matrix factorization method with convexity constraints. Due to local minima, a good initialization is essential, but frequently used initialization methods yield either sub-optimal starting points or are prone to get stuck in ...
Sjölund, Jens, Mair, Sebastian
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Archetypal analysis as an autoencoder
, 2022 815We present an efficient approach to archetypal analysis where we use sub-gradient algorithms for optimization over the simplex to determine archetypes and reconstruction coefficients.
Kersting, Kristian +3 more
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Traces of unconscious mental processes in introspective reports and physiological responses. [PDF]
PLoS ONE, 2015 Unconscious mental processes have recently started gaining attention in a number of scientific disciplines. One of the theoretical frameworks for describing unconscious processes was introduced by Jung as a part of his model of the psyche. This framework
Leonid Ivonin +5 more
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VERBAL AND NON-VERBAL MEANS OF ARCHETYPAL IMAGES REPRESENTATION IN THE US PRESIDENTIAL CAMPAIGN ADS [PDF]
Alfred Nobel University Journal of PhilologyIn recent years, a considerable upsurge of the interdisciplinary research of the means of suggestive influence, exerted on the electorate through various products of political discourse, has been displayed.
Alla A. Kalyta, Nataliia V. Derkach
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SUnAA: Sparse Unmixing Using Archetypal Analysis
IEEE Geoscience and Remote Sensing Letters, 2023 This paper introduces a new sparse unmixing technique using archetypal analysis (SUnAA). First, we design a new model based on archetypal analysis. We assume that the endmembers of interest are a convex combination of endmembers provided by a spectral library and that the number of endmembers of interest is known.
Rasti, Behnood +3 more
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A Survey on Archetypal Analysis
CoRR27 pages, 14 figures, under ...
Aleix Alcacer +3 more
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The human gut microbiome across the life course
FEBS Letters, EarlyView.Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero +4 more
wiley +1 more source
, 2023 Imatge utilitzada per fer publicitat de novetats del CRAI de la Universitat de Barcelona - Vitrina Octubre 2023.El CRAI de la Universitat de Barcelona ha renovat la subscripció a ARAS: Archive for Research in Archetypal Symbolism.
Universitat de Barcelona. CRAI
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