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Single gaussian - PowerPoint PPT Presentation

Ch15. Expectation Maximization for Gaussian mixture

Ch15. Expectation Maximization for Gaussian mixture. KH Wong. Overview. Introduction, Problem definition Basic Theory: ( i ) Probability , likelihood and log-likelihood functions, (ii) Gaussian mixture EM algorithm and example Further theory Summary. Problem definition.

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596 views • 59 slides

Fitting Sums of Gaussians

Fitting Sums of Gaussians. Can model fitting using sums of Gaussians provide an unbiased estimate of galaxy shear?. Lisa Voigt & Sarah Bridle UCL. Talk Overview. Can modelling with sums of Gaussians provide an unbiased estimate of the ellipticity of galaxies with elliptical isophotes?

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384 views • 25 slides

Update on scraper scans

Update on scraper scans. Lene Drosdal. New scan strategy. Large tail population observed ? Always scan up to 100% of beam Beam core: Fit single Gaussian of points >50% Beam with tails: Fit double Gaussian. Correct position. Tail identification . Drift of beam position.

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196 views • 6 slides

HES-HKS analysis meeting

HES-HKS analysis meeting. 23/Jan/2013 Toshi Gogami. Contents. Single Gaussian fitting of 12 ? B g.s . with background events. ? Mean value shift due to background shape How much is it? ( E05-115 data ) ( After and Before B.G. subtraction ). Peak finding with a ROOT function.

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125 views • 6 slides

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Single gaussian - PowerPoint PPT Presentation

Ch15. Expectation Maximization for Gaussian mixture

Fitting Sums of Gaussians

Update on scraper scans

HES-HKS analysis meeting