Amin Bigdeli

2026

Query Performance Prediction Using Neural Query Space Proximity.

Amin Bigdeli|Sajad Ebrahimi|Negar Arabzadeh|Sara Salamat|Shirin Seyedsalehi|Maryam Khodabakhsh|Fattane Zarrinkalam|Ebrahim Bagheri

ACM Transactions on Intelligent Systems and Technology (TIST) 2026 Volume 17 Issue 1

EMPRA: Embedding Perturbation Rank Attack against Neural Ranking Models.

Amin Bigdeli|Negar Arabzadeh|Ebrahim Bagheri|Charles L. A. Clarke

ACM Transactions on Information Systems (TOIS) 2026 Volume 44 Issue 4

ReFormeR: Learning and Applying Explicit Query Reformulation Patterns.

Amin Bigdeli|Mert Incesu|Negar Arabzadeh|Charles L. A. Clarke|Ebrahim Bagheri

Advances in Information Retrieval - 48th European Conference on Information Retrieval, ECIR 2026, Delft, The Netherlands, March 29 - April 2, 2026, Proceedings, Part II

QueryGym: A Toolkit for Reproducible LLM-Based Query Reformulation.

Amin Bigdeli|Radin Hamidi Rad|Mert Incesu|Negar Arabzadeh|Charles L. A. Clarke|Ebrahim Bagheri

Companion Proceedings of the ACM Web Conference 2026, WWW Companion 2026, Dubai, United Arab Emirates, 29 June 2026 - 3 July 2026

2025

Understanding and Mitigating Gender Bias in Information Retrieval Systems.

Shirin Seyedsalehi|Amin Bigdeli|Negar Arabzadeh|Batool AlMousawi|Zack Marshall|Morteza Zihayat|Ebrahim Bagheri

Foundations and Trends in Information Retrieval 2025 Volume 19 Issue 3

Datasets for Supervised Adversarial Attacks on Neural Rankers.

Amir Khosrojerdi|Amin Bigdeli|Radin Hamidi Rad|Morteza Zihayat|Charles L. A. Clarke|Ebrahim Bagheri

Proceedings of the 34th ACM International Conference on Information and Knowledge Management, CIKM 2025, Seoul, Republic of Korea, November 10-14, 2025

2024

LaQuE: Enabling Entity Search at Scale.

Negar Arabzadeh|Amin Bigdeli|Ebrahim Bagheri

Advances in Information Retrieval - 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24-28, 2024, Proceedings, Part II

Adapting Standard Retrieval Benchmarks to Evaluate Generated Answers.

Negar Arabzadeh|Amin Bigdeli|Charles L. A. Clarke

Advances in Information Retrieval - 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24-28, 2024, Proceedings, Part II

Learning to Jointly Transform and Rank Difficult Queries.

Amin Bigdeli|Negar Arabzadeh|Ebrahim Bagheri

Advances in Information Retrieval - 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24-28, 2024, Proceedings, Part IV

2023

Neural Disentanglement of Query Difficulty and Semantics.

Sara Salamat|Negar Arabzadeh|Shirin Seyedsalehi|Amin Bigdeli|Morteza Zihayat|Ebrahim Bagheri

Proceedings of the 32nd ACM International Conference on Information and Knowledge Management, CIKM 2023, Birmingham, United Kingdom, October 21-25, 2023

De-biasing Relevance Judgements for Fair Ranking.

Amin Bigdeli|Negar Arabzadeh|Shirin Seyedsalehi|Bhaskar Mitra|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Dublin, Ireland, April 2-6, 2023, Proceedings, Part II

Don't Raise Your Voice, Improve Your Argument: Learning to Retrieve Convincing Arguments.

Sara Salamat|Negar Arabzadeh|Amin Bigdeli|Shirin Seyedsalehi|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Dublin, Ireland, April 2-6, 2023, Proceedings, Part II

Understanding and Mitigating Gender Bias in Information Retrieval Systems.

Amin Bigdeli|Negar Arabzadeh|Shirin Seyedsalehi|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 45th European Conference on Information Retrieval, ECIR 2023, Dublin, Ireland, April 2-6, 2023, Proceedings, Part III

Quantifying Ranker Coverage of Different Query Subspaces.

Negar Arabzadeh|Amin Bigdeli|Radin Hamidi Rad|Ebrahim Bagheri

Proceedings of the 46th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2023, Taipei, Taiwan, July 23-27, 2023

2022

A Light-Weight Strategy for Restraining Gender Biases in Neural Rankers.

Amin Bigdeli|Negar Arabzadeh|Shirin Seyedsalehi|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part II

Gender Fairness in Information Retrieval Systems.

Amin Bigdeli|Negar Arabzadeh|Shirin Seyedsalehi|Morteza Zihayat|Ebrahim Bagheri

SIGIR '22: The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval, Madrid, Spain, July 11 - 15, 2022

Addressing Gender-related Performance Disparities in Neural Rankers.

Shirin Seyedsalehi|Amin Bigdeli|Negar Arabzadeh|Morteza Zihayat|Ebrahim Bagheri

SIGIR '22: The 45th International ACM SIGIR Conference on Research and Development in Information Retrieval, Madrid, Spain, July 11 - 15, 2022

2021

Matches Made in Heaven: Toolkit and Large-Scale Datasets for Supervised Query Reformulation.

Negar Arabzadeh|Junseok Park|Shirin Seyedsalehi|Alexander Schill|Morteza Zihayat|Ebrahim Bagheri|Sungji Choo|Amin Bigdeli|Shirin Seyedsalehi|Junseok Park|Alexander Schill|Morteza Zihayat|Sungji Choo|Ebrahim Bagheri

CIKM '21: The 30th ACM International Conference on Information and Knowledge Management, Virtual Event, Queensland, Australia, November 1 - 5, 2021

Query Performance Prediction Through Retrieval Coherency.

Negar Arabzadeh|Amin Bigdeli|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II

Exploring Gender Biases in Information Retrieval Relevance Judgement Datasets.

Amin Bigdeli|Negar Arabzadeh|Morteza Zihayat|Ebrahim Bagheri

Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II

On the Orthogonality of Bias and Utility in Ad hoc Retrieval.

Amin Bigdeli|Negar Arabzadeh|Shirin Seyedsalehi|Morteza Zihayat|Ebrahim Bagheri

SIGIR '21: The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval, Virtual Event, Canada, July 11-15, 2021