Search Results for author: Maxim Panov

Found 34 papers, 13 papers with code

Uncertainty Estimation of Transformer Predictions for Misclassification Detection

1 code implementation ACL 2022 Artem Vazhentsev, Gleb Kuzmin, Artem Shelmanov, Akim Tsvigun, Evgenii Tsymbalov, Kirill Fedyanin, Maxim Panov, Alexander Panchenko, Gleb Gusev, Mikhail Burtsev, Manvel Avetisian, Leonid Zhukov

Uncertainty estimation (UE) of model predictions is a crucial step for a variety of tasks such as active learning, misclassification detection, adversarial attack detection, out-of-distribution detection, etc.

Active Learning Adversarial Attack Detection +7

Generalization error of spectral algorithms

no code implementations18 Mar 2024 Maksim Velikanov, Maxim Panov, Dmitry Yarotsky

In the present work, we consider the training of kernels with a family of $\textit{spectral algorithms}$ specified by profile $h(\lambda)$, and including KRR and GD as special cases.

Fact-Checking the Output of Large Language Models via Token-Level Uncertainty Quantification

no code implementations7 Mar 2024 Ekaterina Fadeeva, Aleksandr Rubashevskii, Artem Shelmanov, Sergey Petrakov, Haonan Li, Hamdy Mubarak, Evgenii Tsymbalov, Gleb Kuzmin, Alexander Panchenko, Timothy Baldwin, Preslav Nakov, Maxim Panov

Uncertainty scores leverage information encapsulated in the output of a neural network or its layers to detect unreliable predictions, and we show that they can be used to fact-check the atomic claims in the LLM output.

Fact Checking Hallucination +1

Predictive Uncertainty Quantification via Risk Decompositions for Strictly Proper Scoring Rules

no code implementations16 Feb 2024 Nikita Kotelevskii, Maxim Panov

Distinguishing sources of predictive uncertainty is of crucial importance in the application of forecasting models across various domains.

Uncertainty Quantification

Dirichlet-based Uncertainty Quantification for Personalized Federated Learning with Improved Posterior Networks

no code implementations18 Dec 2023 Nikita Kotelevskii, Samuel Horváth, Karthik Nandakumar, Martin Takáč, Maxim Panov

This paper presents a new approach to federated learning that allows selecting a model from global and personalized ones that would perform better for a particular input point.

Personalized Federated Learning Uncertainty Quantification

LM-Polygraph: Uncertainty Estimation for Language Models

no code implementations13 Nov 2023 Ekaterina Fadeeva, Roman Vashurin, Akim Tsvigun, Artem Vazhentsev, Sergey Petrakov, Kirill Fedyanin, Daniil Vasilev, Elizaveta Goncharova, Alexander Panchenko, Maxim Panov, Timothy Baldwin, Artem Shelmanov

Recent advancements in the capabilities of large language models (LLMs) have paved the way for a myriad of groundbreaking applications in various fields.

Text Generation

Selective Nonparametric Regression via Testing

no code implementations28 Sep 2023 Fedor Noskov, Alexander Fishkov, Maxim Panov

Prediction with the possibility of abstention (or selective prediction) is an important problem for error-critical machine learning applications.

regression

Conformal Prediction for Federated Uncertainty Quantification Under Label Shift

no code implementations8 Jun 2023 Vincent Plassier, Mehdi Makni, Aleksandr Rubashevskii, Eric Moulines, Maxim Panov

Federated Learning (FL) is a machine learning framework where many clients collaboratively train models while keeping the training data decentralized.

Conformal Prediction Federated Learning +2

Scalable Batch Acquisition for Deep Bayesian Active Learning

1 code implementation13 Jan 2023 Aleksandr Rubashevskii, Daria Kotova, Maxim Panov

In deep active learning, it is especially important to choose multiple examples to markup at each step to work efficiently, especially on large datasets.

Active Learning

Learning Confident Classifiers in the Presence of Label Noise

no code implementations2 Jan 2023 Asma Ahmed Hashmi, Aigerim Zhumabayeva, Nikita Kotelevskii, Artem Agafonov, Mohammad Yaqub, Maxim Panov, Martin Takáč

We evaluate the proposed method on a series of classification tasks such as noisy versions of MNIST, CIFAR-10, Fashion-MNIST datasets as well as CIFAR-10N, which is real-world dataset with noisy human annotations.

Image Segmentation Medical Image Segmentation +2

ScaleFace: Uncertainty-aware Deep Metric Learning

1 code implementation5 Sep 2022 Roman Kail, Kirill Fedyanin, Nikita Muravev, Alexey Zaytsev, Maxim Panov

The performance of modern deep learning-based systems dramatically depends on the quality of input objects.

Face Recognition Image Retrieval +2

Scalable computation of prediction intervals for neural networks via matrix sketching

no code implementations6 May 2022 Alexander Fishkov, Maxim Panov

Accounting for the uncertainty in the predictions of modern neural networks is a challenging and important task in many domains.

Computational Efficiency Prediction Intervals +1

Embedded Ensembles: Infinite Width Limit and Operating Regimes

no code implementations24 Feb 2022 Maksim Velikanov, Roman Kail, Ivan Anokhin, Roman Vashurin, Maxim Panov, Alexey Zaytsev, Dmitry Yarotsky

In this limit, we identify two ensemble regimes - independent and collective - depending on the architecture and initialization strategy of ensemble models.

Monte Carlo Variational Auto-Encoders

2 code implementations30 Jun 2021 Achille Thin, Nikita Kotelevskii, Arnaud Doucet, Alain Durmus, Eric Moulines, Maxim Panov

Variational auto-encoders (VAE) are popular deep latent variable models which are trained by maximizing an Evidence Lower Bound (ELBO).

Nonreversible MCMC from conditional invertible transforms: a complete recipe with convergence guarantees

no code implementations31 Dec 2020 Achille Thin, Nikita Kotelevskii, Christophe Andrieu, Alain Durmus, Eric Moulines, Maxim Panov

This paper fills the gap by developing general tools to ensure that a class of nonreversible Markov kernels, possibly relying on complex transforms, has the desired invariance property and leads to convergent algorithms.

EWS-GCN: Edge Weight-Shared Graph Convolutional Network for Transactional Banking Data

no code implementations30 Sep 2020 Ivan Sukharev, Valentina Shumovskaia, Kirill Fedyanin, Maxim Panov, Dmitry Berestnev

In this paper, we discuss how modern deep learning approaches can be applied to the credit scoring of bank clients.

Dropout Strikes Back: Improved Uncertainty Estimation via Diversity Sampling

1 code implementation6 Mar 2020 Kirill Fedyanin, Evgenii Tsymbalov, Maxim Panov

Uncertainty estimation for machine learning models is of high importance in many scenarios such as constructing the confidence intervals for model predictions and detection of out-of-distribution or adversarially generated points.

Point Processes

NCVis: Noise Contrastive Approach for Scalable Visualization

1 code implementation30 Jan 2020 Aleksandr Artemenkov, Maxim Panov

Modern methods for data visualization via dimensionality reduction, such as t-SNE, usually have performance issues that prohibit their application to large amounts of high-dimensional data.

Data Visualization Dimensionality Reduction

Linking Bank Clients using Graph Neural Networks Powered by Rich Transactional Data

no code implementations23 Jan 2020 Valentina Shumovskaia, Kirill Fedyanin, Ivan Sukharev, Dmitry Berestnev, Maxim Panov

Financial institutions obtain enormous amounts of data about user transactions and money transfers, which can be considered as a large graph dynamically changing in time.

Link Prediction Time Series +1

Geometry-Aware Maximum Likelihood Estimation of Intrinsic Dimension

1 code implementation12 Apr 2019 Marina Gomtsyan, Nikita Mokrov, Maxim Panov, Yury Yanovich

The existing approaches to intrinsic dimension estimation usually are not reliable when the data are nonlinearly embedded in the high dimensional space.

regression

Deeper Connections between Neural Networks and Gaussian Processes Speed-up Active Learning

1 code implementation27 Feb 2019 Evgenii Tsymbalov, Sergei Makarychev, Alexander Shapeev, Maxim Panov

Active learning methods for neural networks are usually based on greedy criteria which ultimately give a single new design point for the evaluation.

Active Learning Gaussian Processes

Constructing Graph Node Embeddings via Discrimination of Similarity Distributions

no code implementations6 Oct 2018 Stanislav Tsepa, Maxim Panov

The problem of unsupervised learning node embeddings in graphs is one of the important directions in modern network science.

Link Prediction

Dropout-based Active Learning for Regression

no code implementations26 Jun 2018 Evgenii Tsymbalov, Maxim Panov, Alexander Shapeev

Active learning is relevant and challenging for high-dimensional regression models when the annotation of the samples is expensive.

Active Learning regression

Sparse Group Inductive Matrix Completion

no code implementations27 Apr 2018 Ivan Nazarov, Boris Shirokikh, Maria Burkina, Gennady Fedonin, Maxim Panov

We consider the problem of matrix completion with side information (\textit{inductive matrix completion}).

feature selection Low-Rank Matrix Completion

Consistent Estimation of Mixed Memberships with Successive Projections

2 code implementations5 Jul 2017 Maxim Panov, Konstantin Slavnov, Roman Ushakov

This paper considers the parameter estimation problem in Mixed Membership Stochastic Block Model (MMSB), which is a quite general instance of random graph model allowing for overlapping community structure.

Statistics Theory Statistics Theory

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