Search Results for author: Abhijit Anand

Found 8 papers, 1 papers with code

The Surprising Effectiveness of Rankers Trained on Expanded Queries

no code implementations3 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.

Document Ranking Passage Ranking

NUMTEMP: A real-world benchmark to verify claims with statistical and temporal expressions

no code implementations25 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.

Claim Verification Fact Checking +1

Data Augmentation for Sample Efficient and Robust Document Ranking

no code implementations26 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.

Data Augmentation Document Ranking

Context Aware Query Rewriting for Text Rankers using LLM

no code implementations31 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.

Document Ranking Passage Ranking

Query Understanding in the Age of Large Language Models

no code implementations28 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).

Retrieval

Supervised Contrastive Learning Approach for Contextual Ranking

no code implementations7 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.

Contrastive Learning Data Augmentation +2

Efficient Neural Ranking using Forward Indexes

1 code implementation12 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.

Document Ranking Retrieval +2

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