Search Results for author: Achintya Gopal

Found 10 papers, 0 papers with code

Towards Efficient Active Learning in NLP via Pretrained Representations

no code implementations23 Feb 2024 Artem Vysogorets, Achintya Gopal

Fine-tuning Large Language Models (LLMs) is now a common approach for text classification in a wide range of applications.

Active Learning text-classification +1

Causal Discovery in Financial Markets: A Framework for Nonstationary Time-Series Data

no code implementations28 Dec 2023 Agathe Sadeghi, Achintya Gopal, Mohammad Fesanghary

A deeper comprehension of financial markets necessitates understanding not only the statistical dependencies among various entities but also the causal dependencies.

Causal Discovery Time Series

Generative Machine Learning for Multivariate Equity Returns

no code implementations21 Nov 2023 Ruslan Tepelyan, Achintya Gopal

The use of machine learning to generate synthetic data has grown in popularity with the proliferation of text-to-image models and especially large language models.

Portfolio Optimization

DP-TBART: A Transformer-based Autoregressive Model for Differentially Private Tabular Data Generation

no code implementations19 Jul 2023 Rodrigo Castellon, Achintya Gopal, Brian Bloniarz, David Rosenberg

The generation of synthetic tabular data that preserves differential privacy is a problem of growing importance.

ELF: Exact-Lipschitz Based Universal Density Approximator Flow

no code implementations13 Dec 2021 Achintya Gopal

Normalizing flows have grown more popular over the last few years; however, they continue to be computationally expensive, making them difficult to be accepted into the broader machine learning community.

Why Calibration Error is Wrong Given Model Uncertainty: Using Posterior Predictive Checks with Deep Learning

no code implementations2 Dec 2021 Achintya Gopal

Within the last few years, there has been a move towards using statistical models in conjunction with neural networks with the end goal of being able to better answer the question, "what do our models know?".

Discovering Supply Chain Links with Augmented Intelligence

no code implementations2 Nov 2021 Achintya Gopal, Chunho Chang

One of the key components in analyzing the risk of a company is understanding a company's supply chain.

Estimation of Corporate Greenhouse Gas Emissions via Machine Learning

no code implementations9 Sep 2021 You Han, Achintya Gopal, Liwen Ouyang, Aaron Key

By training a machine learning model on disclosed GHG emissions, we are able to estimate the emissions of other companies globally who do not disclose their emissions.

BIG-bench Machine Learning

Normalizing Flows for Calibration and Recalibration

no code implementations1 Jan 2021 Achintya Gopal, Aaron Key

One approach to fix this is isotonic regression, in which a monotonic function is fit on a validation set to map the model's CDF to an optimally calibrated CDF.

regression

Quasi-Autoregressive Residual (QuAR) Flows

no code implementations16 Sep 2020 Achintya Gopal

Normalizing Flows are a powerful technique for learning and modeling probability distributions given samples from those distributions.

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