
Intelligent Retrieval and Information Systems (IRIS) Group
Transforming how humans and machines discover, interpret, and interact with knowledge in the digital age.
The IRIS Lab is dedicated to advancing the frontier of intelligent information systems research. We explore the fascinating challenge of teaching machines to move beyond simple data retrieval toward genuine understanding, reasoning, and natural interaction with knowledge repositories.
Our work sits at the convergence of Information Retrieval (IR), Natural Language Processing (NLP), and Large Language Models (LLMs), creating systems that evolve alongside users’ increasingly sophisticated information needs. Rather than treating search as a static process, we envision it as an adaptive dialogue between humans and machines.
At the IRIS Lab, we blend the foundations of traditional IR with cutting-edge neural architectures to develop systems that don’t just locate information—they enhance comprehension, uncover meaningful connections, and deliver contextually relevant results. A central focus of our research is Retrieval-Augmented Generation (RAG), leveraging the remarkable capabilities of LLMs while ensuring precision, transparency, and reliability.
Through this work, we aim to fundamentally transform the digital information landscape, building technologies that bridge vast, complex data ecosystems and intuitive human understanding. Our efforts carry broad implications across domains where intelligent information access is critical, from science and education to business, healthcare, and governance.
Join us as we push the boundaries of Large Language Models, Retrieval-Augmented Generation, and Neural IR to advance how machines understand and interact with information.
Important Notice
Please do not contact us for PhD positions or paid RA (Research Assistant) positions. We currently do not have funding and will not be able to reply to such emails.
We do not plan to hire more RAs or PhD students in the foreseeable future unless we secure a major grant.
However, if you are looking to gain research experience and work with us on a project that could lead to a research paper, please contact the PI; he would be happy to collaborate with you. Please note that these positions will be unpaid.
Thank you for your understanding.
Announcements
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Paper accepted to SIGIR 2025
Our paper titled “QDER: Query-Specific Document and Entity Representations for Multi-Vector Document Re-Ranking” has been accepted to SIGIR 2025!! The conference would be held in Italy in July. This was a collaborative work with Dr. Jeff Dalton at the University of Edinburgh in the UK…. Read more
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Paper accepted to EMNLP 2024
Our paper titled “DyVo: Dynamic Vocabularies for Learned Sparse Retrieval with Entities” has been accepted to EMNLP 2024!! This is a collaborative work with Thong Nguyen and Dr. Andrew Yates at the University of Amsterdam, The Netherlands; Dr. Sean MacAvaney at the University of Glasgow, UK; and Iain Mackie and Dr. Jeff Dalton at the University… Read more
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Call for Missouri S&T BS/MS Students Interested in Research
Are you a BS/MS student enrolled in a thesis or project and eager to gain hands-on research experience in cutting-edge areas of Information Retrieval (IR), Natural Language Processing (NLP), and Conversational AI? If so, this is an excellent opportunity to collaborate with me on innovative topics that align with your academic goals and help you build a strong foundation in research. Who… Read more