[Turing-Southampton] S3RI seminar: Herwig Friedl (Graz University of Technology), Thursday 22 April

[Chieh-Hsi Wu]

Dear all,

Hope everyone is having a nice week.

Today at 2 pm, we have an S3RI seminar, where Prof Herwig Friedl (Graz University of Technology) is giving a talk on



"Mixture Models in Practice."



Please see below for the details of the talk and how to join the seminar online.

Hope to see you at the seminar today!



Kind regards,

Jessie



Mixture Models in Practice
Herwig Friedl (Graz University of Technology)

On the basis of two rather convincing applications of Mixture Models we will introduce into this model class. In a first study we deal with black and white C-SAM images of wafer structures. The statistical analysis is based on the corresponding multi-modal histograms of the greyscales. The objective is to draw conclusions on both, the quality of the wafers as also on the contrast of the images. A heterogeneous mixture of gamma densities together with a uniform component has been applied to enable such a two-fold failure analysis.

Another application deals with a homogeneous mixture of Generalized Non-Linear Models to estimate the daily maximum gas consumption depending on the outside temperature.  For this purpose, we implemented “flexmixNL” as an extension of the well-known R package “flexmix”.  This now allows for the analysis of such a mixture of linear exponential families in which the means are non-linearly modeled, here by a family of sigmoid functions.

(Joint work with Peter Scheibelhofer and Sanela Omerovic)


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Chieh-Hsi (Jessie) Wu, PhD

Lecturer in Statistics

School of Mathematics

University of Southampton

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