← Search

Ehsan Doostmohammadi

4 accepted papers

2025

Studying the Role of Input-Neighbor Overlap in Retrieval-Augmented Language Models Training Efficiency

EMNLP 2025

Retrieval-augmented language models have demonstrated performance comparable to much larger models while requiring fewer computational resources. The effectiveness of these models crucially depends on the overlap between query and retrieved context, but the optimal degree of this overlap remains une

2024

How Reliable Are Automatic Evaluation Methods for Instruction-Tuned LLMs?

EMNLP 2024finding

Work on instruction-tuned Large Language Models (LLMs) has used automatic methods based on text overlap and LLM judgments as cost-effective alternatives to human evaluation. In this paper, we perform a meta-evaluation of such methods and assess their reliability across a broad range of tasks. In eva…

2023

Surface-Based Retrieval Reduces Perplexity of Retrieval-Augmented Language Models

ACL 2023short

Augmenting language models with a retrieval mechanism has been shown to significantly improve their performance while keeping the number of parameters low. Retrieval-augmented models commonly rely on a semantic retrieval mechanism based on the similarity between dense representations of the query ch…

2020

Joint Persian Word Segmentation Correction and Zero-Width Non-Joiner Recognition Using BERT

COLING 2020main

Words are properly segmented in the Persian writing system; in practice, however, these writing rules are often neglected, resulting in single words being written disjointedly and multiple words written without any white spaces between them. This paper addresses the problems of word segmentation and…