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Harald Vöhringer, PhD

Thoughts and observations.

Deconstructing the discrete Fourier transform

2025-07-11

A visual and intuitive breakdown of the discrete Fourier transform and how it reveals hidden frequencies in a signal.

Youtube notetaking with Obsidian

2025-07-09

How I write notes on Youtube with Obsidian.

Fully Connected Sigmoid Networks

2025-01-23

In this article, I explore how autoregression, typically used in temporal or sequential data, can be applied to images.

Revisiting Variational Inference for Statististican

2022-02-27

In this blogpost, I'll extend the derivations of the Gaussian Mixture model of the paper in the hope to elucidate some of the steps over which the authors went quickly.

Fitting a Poisson mixture model using Expectation Maximisation

2021-12-31

In this Blogpost we will derive the equations required to fit Poisson mixture from scratch and implement the model using Python.

Config Enumerate in Pyro

2020-06-21

Understanding Pyro’s enumeration strategy for discrete latent variables.