Search Results for author: Dharmashankar Subramanian

Found 16 papers, 3 papers with code

Self-Supervised Contrastive Pre-Training for Multivariate Point Processes

no code implementations1 Feb 2024 Xiao Shou, Dharmashankar Subramanian, Debarun Bhattacharjya, Tian Gao, Kristin P. Bennet

Self-supervision is one of the hallmarks of representation learning in the increasingly popular suite of foundation models including large language models such as BERT and GPT-3, but it has not been pursued in the context of multivariate event streams, to the best of our knowledge.

Point Processes Representation Learning +1

Adaptive Primal-Dual Method for Safe Reinforcement Learning

no code implementations1 Feb 2024 Weiqin Chen, James Onyejizu, Long Vu, Lan Hoang, Dharmashankar Subramanian, Koushik Kar, Sandipan Mishra, Santiago Paternain

In this paper, we propose, analyze and evaluate adaptive primal-dual (APD) methods for SRL, where two adaptive LRs are adjusted to the Lagrangian multipliers so as to optimize the policy in each iteration.

reinforcement-learning Safe Reinforcement Learning

Matching Table Metadata with Business Glossaries Using Large Language Models

no code implementations8 Sep 2023 Elita Lobo, Oktie Hassanzadeh, Nhan Pham, Nandana Mihindukulasooriya, Dharmashankar Subramanian, Horst Samulowitz

The resulting matching enables the use of an available or curated business glossary for retrieval and analysis without or before requesting access to the data contents.

Retrieval

The Information Pathways Hypothesis: Transformers are Dynamic Self-Ensembles

1 code implementation2 Jun 2023 Md Shamim Hussain, Mohammed J. Zaki, Dharmashankar Subramanian

However, the dynamic (i. e., input-dependent) nature of these pathways makes it difficult to prune dense self-attention during training.

Graph Learning Graph Regression +3

AutoDOViz: Human-Centered Automation for Decision Optimization

no code implementations19 Feb 2023 Daniel Karl I. Weidele, Shazia Afzal, Abel N. Valente, Cole Makuch, Owen Cornec, Long Vu, Dharmashankar Subramanian, Werner Geyer, Rahul Nair, Inge Vejsbjerg, Radu Marinescu, Paulito Palmes, Elizabeth M. Daly, Loraine Franke, Daniel Haehn

AutoDOViz seeks to lower the barrier of entry for data scientists in problem specification for reinforcement learning problems, leverage the benefits of AutoDO algorithms for RL pipeline search and finally, create visualizations and policy insights in order to facilitate the typical interactive nature when communicating problem formulation and solution proposals between DO experts and domain experts.

AutoML reinforcement-learning +1

Learning Temporal Rules from Noisy Timeseries Data

no code implementations11 Feb 2022 Karan Samel, Zelin Zhao, Binghong Chen, Shuang Li, Dharmashankar Subramanian, Irfan Essa, Le Song

Events across a timeline are a common data representation, seen in different temporal modalities.

Neural Temporal Logic Programming

no code implementations29 Sep 2021 Karan Samel, Zelin Zhao, Binghong Chen, Shuang Li, Dharmashankar Subramanian, Irfan Essa, Le Song

Events across a timeline are a common data representation, seen in different temporal modalities.

Global Self-Attention as a Replacement for Graph Convolution

3 code implementations7 Aug 2021 Md Shamim Hussain, Mohammed J. Zaki, Dharmashankar Subramanian

The resultant framework - which we call Edge-augmented Graph Transformer (EGT) - can directly accept, process and output structural information of arbitrary form, which is important for effective learning on graph-structured data.

Edge Classification Graph Classification +7

A Multi-Channel Neural Graphical Event Model with Negative Evidence

no code implementations21 Feb 2020 Tian Gao, Dharmashankar Subramanian, Karthikeyan Shanmugam, Debarun Bhattacharjya, Nicholas Mattei

Event datasets are sequences of events of various types occurring irregularly over the time-line, and they are increasingly prevalent in numerous domains.

Proximal Graphical Event Models

no code implementations NeurIPS 2018 Debarun Bhattacharjya, Dharmashankar Subramanian, Tian Gao

Event datasets include events that occur irregularly over the timeline and are prevalent in numerous domains.

Solution Methods for Constrained Markov Decision Process with Continuous Probability Modulation

no code implementations26 Sep 2013 Marek Petrik, Dharmashankar Subramanian, Janusz Marecki

We propose solution methods for previously-unsolved constrained MDPs in which actions can continuously modify the transition probabilities within some acceptable sets.

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