Search Results for author: Siddharth Ramchandran

Found 4 papers, 1 papers with code

A Variational Autoencoder for Heterogeneous Temporal and Longitudinal Data

1 code implementation20 Apr 2022 Mine Öğretir, Siddharth Ramchandran, Dimitrios Papatheodorou, Harri Lähdesmäki

In this work, we propose the heterogeneous longitudinal VAE (HL-VAE) that extends the existing temporal and longitudinal VAEs to heterogeneous data.

Imputation

Learning Conditional Variational Autoencoders with Missing Covariates

no code implementations2 Mar 2022 Siddharth Ramchandran, Gleb Tikhonov, Otto Lönnroth, Pekka Tiikkainen, Harri Lähdesmäki

Conditional variational autoencoders (CVAEs) are versatile deep generative models that extend the standard VAE framework by conditioning the generative model with auxiliary covariates.

Variational Inference

Longitudinal Variational Autoencoder

no code implementations17 Jun 2020 Siddharth Ramchandran, Gleb Tikhonov, Kalle Kujanpää, Miika Koskinen, Harri Lähdesmäki

Longitudinal datasets measured repeatedly over time from individual subjects, arise in many biomedical, psychological, social, and other studies.

Imputation Time Series Analysis

Latent Gaussian process with composite likelihoods and numerical quadrature

no code implementations4 Sep 2019 Siddharth Ramchandran, Miika Koskinen, Harri Lähdesmäki

Clinical patient records are an example of high-dimensional data that is typically collected from disparate sources and comprises of multiple likelihoods with noisy as well as missing values.

Clustering Dimensionality Reduction +1

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