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Dharmashankar Subramanian

12 accepted papers

2025

Knowledge Base Construction for Knowledge-Augmented Text-to-SQL

ACL 2025finding

Text-to-SQL aims to translate natural language queries into SQL statements, which is practical as it enables anyone to easily retrieve the desired information from databases. Recently, many existing approaches tackle this problem with Large Language Models (LLMs), leveraging their strong capability…

2024

Triplet Interaction Improves Graph Transformers: Accurate Molecular Graph Learning with Triplet Graph Transformers

ICML 2024poster

Graph transformers typically lack third-order interactions, limiting their geometric understanding which is crucial for tasks like molecular geometry prediction. We propose the Triplet Graph Transformer (TGT) that enables direct communication between pairs within a 3-tuple of nodes via novel triplet…

2023

Concurrent Multi-Label Prediction in Event Streams

AAAI 2023technical

Streams of irregularly occurring events are commonly modeled as a marked temporal point process. Many real-world datasets such as e-commerce transactions and electronic health records often involve events where multiple event types co-occur, e.g. multiple items purchased or multiple diseases diagnos…

2023

Pairwise Causality Guided Transformers for Event Sequences

NeurIPS 2023poster

Although pairwise causal relations have been extensively studied in observational longitudinal analyses across many disciplines, incorporating knowledge of causal pairs into deep learning models for temporal event sequences remains largely unexplored. In this paper, we propose a novel approach for e…

Cited by 3SourcePDFScholar
2023

Probabilistic Attention-to-Influence Neural Models for Event Sequences

ICML 2023poster

Discovering knowledge about which types of events influence others, using datasets of event sequences without time stamps, has several practical applications. While neural sequence models are able to capture complex and potentially long-range historical dependencies, they often lack the interpretabi…

Cited by 3SourcePDFScholar
2023

Score-Based Learning of Graphical Event Models with Background Knowledge Augmentation

AAAI 2023technical

Graphical event models (GEMs) are representations of temporal point process dynamics between different event types. Many real-world applications however involve limited event stream data, making it challenging to learn GEMs from data alone. In this paper, we introduce approaches that can work togeth…

2021

Causal Inference for Event Pairs in Multivariate Point Processes

NeurIPS 2021poster

Causal inference and discovery from observational data has been extensively studied across multiple fields. However, most prior work has focused on independent and identically distributed (i.i.d.) data. In this paper, we propose a formalization for causal inference between pairs of event variables i…

Cited by 15SourcePDFScholar
2021

Ordinal Historical Dependence in Graphical Event Models with Tree Representations

AAAI 2021technical

Graphical event models are representations that capture process independence between different types of events in multivariate temporal point processes. The literature consists of various parametric models and approaches to learn them from multivariate event stream data. Since these models are inter…

2020

Cause-Effect Association between Event Pairs in Event Datasets

IJCAI 2020poster

Causal discovery from observational data has been intensely studied across fields of study. In this paper, we consider datasets involving irregular occurrences of various types of events over the timeline. We propose a suite of scores and related algorithms for estimating the cause-effect associatio…

Cited by 0SourcePDFScholar
2020

Order-Dependent Event Models for Agent Interactions

IJCAI 2020poster

In multivariate event data, the instantaneous rate of an event's occurrence may be sensitive to the temporal sequence in which other influencing events have occurred in the history. For example, an agent’s actions are typically driven by preceding actions taken by the agent as well as those of other…

Cited by 0SourcePDFScholar