no code implementations • 3 Apr 2024 • Abhijit Anand, Venktesh V, Vinay Setty, Avishek Anand
In our extensive experiments on the DL-Hard dataset, we find that a principled query performance based scoring method using base and specialized ranker offers a significant improvement of up to 25% on the passage ranking task and up to 48. 4% on the document ranking task when compared to the baseline performance of using original queries, even outperforming SOTA model.
no code implementations • 25 Mar 2024 • Venktesh V, Abhijit Anand, Avishek Anand, Vinay Setty
This addresses the challenge of verifying real-world numerical claims, which are complex and often lack precise information, not addressed by existing works that mainly focus on synthetic claims.
no code implementations • 26 Nov 2023 • Abhijit Anand, Jurek Leonhardt, Jaspreet Singh, Koustav Rudra, Avishek Anand
We then adapt a family of contrastive losses for the document ranking task that can exploit the augmented data to learn an effective ranking model.
no code implementations • 2 Nov 2023 • Jurek Leonhardt, Henrik Müller, Koustav Rudra, Megha Khosla, Abhijit Anand, Avishek Anand
Dual-encoder-based dense retrieval models have become the standard in IR.
no code implementations • 31 Aug 2023 • Abhijit Anand, Venktesh V, Vinay Setty, Avishek Anand
We find that there are two inherent limitations of using LLMs as query re-writers -- concept drift when using only queries as prompts and large inference costs during query processing.
no code implementations • 28 Jun 2023 • Avishek Anand, Venktesh V, Abhijit Anand, Vinay Setty
Querying, conversing, and controlling search and information-seeking interfaces using natural language are fast becoming ubiquitous with the rise and adoption of large-language models (LLM).
no code implementations • 7 Jul 2022 • Abhijit Anand, Jurek Leonhardt, Koustav Rudra, Avishek Anand
This paper proposes a simple yet effective method to improve ranking performance on smaller datasets using supervised contrastive learning for the document ranking problem.
1 code implementation • 12 Oct 2021 • Jurek Leonhardt, Koustav Rudra, Megha Khosla, Abhijit Anand, Avishek Anand
In this paper, we propose the Fast-Forward index -- a simple vector forward index that facilitates ranking documents using interpolation of lexical and semantic scores -- as a replacement for contextual re-rankers and dense indexes based on nearest neighbor search.