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Comparison of outlier detection methods on astronomical image data

Abstract (Expand)

Among the many challenges posed by the huge data volumes produced by the new generation of astronomical instruments there is also the search for rare and peculiar objects. Unsupervised outlier detection … algorithms may provide a viable solution. In this work we compare the performances of six methods: the Local Outlier Factor, Isolation Forest, k-means clustering, a measure of novelty, and both a normal and a convolutional autoencoder. These methods were applied to data extracted from SDSS stripe 82. After discussing the sensitivity of each method to its own set of hyperparameters, we combine the results from each method to rank the objects and produce a final list of outliers.

Authors: Lars Doorenbos, Stefano Cavuoti, Massimo Brescia, Antonio D'Isanto, Giuseppe Longo

Date Published: 2020

Publication Type: Journal

Theory and methodology of scoring functions: Tail properties, interval forecasts, and point processes

Abstract

Not specified

Author: Jonas R. Brehmer

Date Published: 2020

Publication Type: Doctoral Thesis

Robust forecast evaluation of expected shortfall

Abstract

Not specified

Authors: Johanna F Ziegel, Fabian Krüger, Alexander Jordan, Fernando Fasciati

Date Published: 2020

Publication Type: Journal

Skill of global raw and postprocessed ensemble predictions of rainfall in the tropics

Abstract

Not specified

Authors: Peter Vogel, Peter Knippertz, Andreas H. Fink, Andreas Schlueter, Tilmann Gneiting

Date Published: 2020

Publication Type: Journal

Integration of Distributed Parallel Simulation Environment with Cloud-Infrastructures

Abstract (Expand)

This article describes an integration of the subsystems of the distributed parallel simulation environment with cloud infrastructures. A complex support for simulation of the dynamic network object … with distributed parameters on Amazon AWS cloud is provided. As well as a tool helping to significantly save running costs for cloud simulations.

Authors: O. Shcherbakov, Kai L. Polsterer, V. A. Svyatnyy

Date Published: 2020

Publication Type: InProceedings

Independent subspace analysis for unsupervised learning of disentangled representations

Abstract

Not specified

Authors: Jan Stühmer, Richard Turner, Sebastian Nowozin

Date Published: 2020

Publication Type: InProceedings

The plakin domain of C. elegans VAB-10/plectin acts as a hub in a mechanotransduction pathway to promote morphogenesis

Abstract

Not specified

Authors: Shashi Kumar Suman, Csaba Daday, Teresa Ferraro, Thanh Vuong-Brender, Saurabh Tak, Sophie Quintin, François Robin, Frauke Gräter, Michel Labouesse

Date Published: 13th Dec 2019

Publication Type: Journal

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