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We engineer a self-index based retrieval system capable of rank-safe evaluation of top-k queries. The framework generalizes the GREEDY approach of Culpepper et al. (ESA 2010) to handle multi-term queries, including over phrases. We propose…

Data Structures and Algorithms · Computer Science 2014-06-13 Simon Gog , Matthias Petri

Generative models for Information Retrieval, where ranking of documents is viewed as the task of generating a query from a document's language model, were very successful in various IR tasks in the past. However, with the advent of modern…

Computation and Language · Computer Science 2020-10-08 Cicero Nogueira dos Santos , Xiaofei Ma , Ramesh Nallapati , Zhiheng Huang , Bing Xiang

Search engine plays a crucial role in satisfying users' diverse information needs. Recently, Pretrained Language Models (PLMs) based text ranking models have achieved huge success in web search. However, many state-of-the-art text ranking…

Information Retrieval · Computer Science 2023-06-05 Canjia Li , Xiaoyang Wang , Dongdong Li , Yiding Liu , Yu Lu , Shuaiqiang Wang , Zhicong Cheng , Simiu Gu , Dawei Yin

Web search provides a promising way for people to obtain information and has been extensively studied. With the surgence of deep learning and large-scale pre-training techniques, various neural information retrieval models are proposed and…

Information Retrieval · Computer Science 2022-03-02 Yujia Zhou , Jing Yao , Zhicheng Dou , Ledell Wu , Ji-Rong Wen

When building recommendation systems, we seek to output a helpful set of items to the user. Under the hood, a ranking model predicts which of two candidate items is better, and we must distill these pairwise comparisons into the user-facing…

Information Retrieval · Computer Science 2022-07-05 Anastasios N. Angelopoulos , Karl Krauth , Stephen Bates , Yixin Wang , Michael I. Jordan

With the growing popularity of LLM agents and RAG, it has become increasingly important to retrieve documents that are essential for solving a task, even when their connection to the task is indirect or implicit. Addressing this problem…

Information Retrieval · Computer Science 2025-10-14 Junwei Lan , Jianlyu Chen , Zheng Liu , Chaofan Li , Siqi Bao , Defu Lian

When estimating the relevancy between a query and a document, ranking models largely neglect the mutual information among documents. A common wisdom is that if two documents are similar in terms of the same query, they are more likely to…

Machine Learning · Computer Science 2019-09-17 Shihao Zou , Zhonghua Li , Mohammad Akbari , Jun Wang , Peng Zhang

We propose a new approach for the problem of relative depth estimation from a single image. Instead of directly regressing over depth scores, we formulate the problem as estimation of a probability distribution over depth and aim to learn…

Computer Vision and Pattern Recognition · Computer Science 2020-10-15 Alican Mertan , Yusuf Huseyin Sahin , Damien Jade Duff , Gozde Unal

Answering multiple-choice questions in a setting in which no supporting documents are explicitly provided continues to stand as a core problem in natural language processing. The contribution of this article is two-fold. First, it describes…

Computation and Language · Computer Science 2019-11-15 George-Sebastian Pîrtoacă , Traian Rebedea , Stefan Ruseti

Learning to rank has been intensively studied and widely applied in information retrieval. Typically, a global ranking function is learned from a set of labeled data, which can achieve good performance on average but may be suboptimal for…

Information Retrieval · Computer Science 2018-04-25 Qingyao Ai , Keping Bi , Jiafeng Guo , W. Bruce Croft

For many internet businesses, presenting a given list of items in an order that maximizes a certain metric of interest (e.g., click-through-rate, average engagement time etc.) is crucial. We approach the aforementioned task from a…

Machine Learning · Statistics 2017-02-28 Swayambhoo Jain , Akshay Soni , Nikolay Laptev , Yashar Mehdad

With over 200 million published academic documents and millions of new documents being written each year, academic researchers face the challenge of searching for information within this vast corpus. However, existing retrieval systems…

Information Retrieval · Computer Science 2024-05-21 Gengchen Wei , Xinle Pang , Tianning Zhang , Yu Sun , Xun Qian , Chen Lin , Han-Sen Zhong , Wanli Ouyang

Large Language Models (LLMs) often generate inaccurate responses (hallucinations) when faced with questions beyond their knowledge scope. Retrieval-Augmented Generation (RAG) addresses this by leveraging external knowledge, but a critical…

Information Retrieval · Computer Science 2025-09-10 Haoxiang Jin , Ronghan Li , Zixiang Lu , Qiguang Miao

We introduce a new framework for web page ranking -- reinforcement ranking -- that improves the stability and accuracy of Page Rank while eliminating the need for computing the stationary distribution of random walks. Instead of relying on…

Information Retrieval · Computer Science 2013-03-26 Hengshuai Yao , Dale Schuurmans

In the rapidly evolving landscape of digital content, the task of summarizing multimedia documents, which encompass textual, visual, and auditory elements, presents intricate challenges. These challenges include extracting pertinent…

Multimedia · Computer Science 2024-12-30 Azze-Eddine Maredj , Madjid Sadallah

Dense passage retrieval (DPR) is the first step in the retrieval augmented generation (RAG) paradigm for improving the performance of large language models (LLM). DPR fine-tunes pre-trained networks to enhance the alignment of the…

Computation and Language · Computer Science 2024-10-07 Benjamin Reichman , Larry Heck

Recently, neural networks have been successfully employed to improve upon state-of-the-art performance in ad-hoc retrieval tasks via machine-learned ranking functions. While neural retrieval models grow in complexity and impact, little is…

Information Retrieval · Computer Science 2021-07-13 Michael Völske , Alexander Bondarenko , Maik Fröbe , Matthias Hagen , Benno Stein , Jaspreet Singh , Avishek Anand

With the explosive growth of accessible information, expecially on the Internet, evaluation-based filtering has become a crucial task. Various systems have been devised aiming to sort through large volumes of information and select what is…

Data Analysis, Statistics and Probability · Physics 2007-05-23 P. Laureti , L. Moret , Y. -C. Zhang , Y. -K. Yu

Retrieval with extremely long queries and documents is a well-known and challenging task in information retrieval and is commonly known as Query-by-Document (QBD) retrieval. Specifically designed Transformer models that can handle long…

Information Retrieval · Computer Science 2023-11-03 Arian Askari , Suzan Verberne , Amin Abolghasemi , Wessel Kraaij , Gabriella Pasi

Most content-based image retrieval systems consider either one single query, or multiple queries that include the same object or represent the same semantic information. In this paper we consider the content-based image retrieval problem…

Information Retrieval · Computer Science 2015-06-18 Ko-Jen Hsiao , Jeff Calder , Alfred O. Hero