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Petar Stojanov

8 accepted papers

2025

Causal Representation Learning from Multimodal Biomedical Observations

ICLR 2025poster

Prevalent in biomedical applications (e.g., human phenotype research), multimodal datasets can provide valuable insights into the underlying physiological mechanisms. However, current machine learning (ML) models designed to analyze these datasets often lack interpretability and identifiability guar…

Cited by 0SourcePDFScholar
2024

Gene Regulatory Network Inference in the Presence of Dropouts: a Causal View

ICLR 2024oral

Gene regulatory network inference (GRNI) is a challenging problem, particularly owing to the presence of zeros in single-cell RNA sequencing data: some are biological zeros representing no gene expression, while some others are technical zeros arising from the sequencing procedure (aka dropouts), wh…

2024

Towards Understanding Extrapolation: a Causal Lens

NeurIPS 2024poster

Canonical work handling distribution shifts typically necessitates an entire target distribution that lands inside the training distribution. However, practical scenarios often involve only a handful target samples, potentially lying outside the training support, which requires the capability of ext…

Cited by 1SourcePDFScholar
2022

Partial disentanglement for domain adaptation

ICML 2022spotlight

Unsupervised domain adaptation is critical to many real-world applications where label information is unavailable in the target domain. In general, without further assumptions, the joint distribution of the features and the label is not identifiable in the target domain. To address this issue, we re…

Cited by 81SourcePDFScholar
2021

Domain Adaptation with Invariant Representation Learning: What Transformations to Learn?

NeurIPS 2021poster

Unsupervised domain adaptation, as a prevalent transfer learning setting, spans many real-world applications. With the increasing representational power and applicability of neural networks, state-of-the-art domain adaptation methods make use of deep architectures to map the input features $X$ to a…

2020

Domain Adaptation as a Problem of Inference on Graphical Models

NeurIPS 2020poster

This paper is concerned with data-driven unsupervised domain adaptation, where it is unknown in advance how the joint distribution changes across domains, i.e., what factors or modules of the data distribution remain invariant or change across domains. To develop an automated way of domain adaptatio…

2019

Data-Driven Approach to Multiple-Source Domain Adaptation

AISTATS 2019poster

A key problem in domain adaptation is determining what to transfer across different domains. We propose a data-driven method to represent these changes across multiple source domains and perform unsupervised domain adaptation. We assume that the joint distributions follow a specific generating proce…

Cited by 38SourcePDFScholar
2019

Low-Dimensional Density Ratio Estimation for Covariate Shift Correction

AISTATS 2019poster

Covariate shift is a prevalent setting for supervised learning in the wild when the training and test data are drawn from different time periods, different but related domains, or via different sampling strategies. This paper addresses a transfer learning setting, with covariate shift between sourc…

Cited by 34SourcePDFScholar