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With the rapid development of recommender systems, accuracy is no longer the only golden criterion for evaluating whether the recommendation results are satisfying or not. In recent years, diversity has gained tremendous attention in…

Information Retrieval · Computer Science 2019-05-17 Qiong Wu , Yong Liu , Chunyan Miao , Yin Zhao , Lu Guan , Haihong Tang

In this paper, we introduce a novel approach to improve the diversity of Top-N recommendations while maintaining accuracy. Our approach employs a user-centric pre-processing strategy aimed at exposing users to a wide array of content…

Information Retrieval · Computer Science 2025-02-05 Manel Slokom , Savvina Danil , Laura Hollink

Recommendations Systems allow users to identify trending items among a community while being timely and relevant to the user's expectations. When the purpose of various Recommendation Systems differs, the required type of recommendations…

Information Retrieval · Computer Science 2022-05-05 Dinuka Ravijaya Piyadigama , Guhanathan Poravi

Bundle recommendation aims to recommend the user a bundle of items as a whole. Nevertheless, they usually neglect the diversity of the user's intents on adopting items and fail to disentangle the user's intents in representations. In the…

Information Retrieval · Computer Science 2022-08-26 Sen Zhao , Wei Wei , Ding Zou , Xianling Mao

Using multiple carousels, lists that wrap around and can be scrolled, is the basis for offering content in most contemporary movie streaming platforms. Carousels allow for highlighting different aspects of users' taste, that fall in…

Information Retrieval · Computer Science 2025-11-19 Daniël Wilten , Gideon Maillette de Buy Wenniger , Arjen Hommersom , Paul Lucassen , Emiel Poortman

Recent works in recommendation systems have focused on diversity in recommendations as an important aspect of recommendation quality. In this work we argue that the post-processing algorithms aimed at only improving diversity among…

Computers and Society · Computer Science 2018-07-18 Jurek Leonhardt , Avishek Anand , Megha Khosla

Recommender systems apply data mining techniques and prediction algorithms to predict users' interest on information, products and services among the tremendous amount of available items. The vast growth of information on the Internet as…

Information Retrieval · Computer Science 2016-11-25 Dhoha Almazro , Ghadeer Shahatah , Lamia Albdulkarim , Mona Kherees , Romy Martinez , William Nzoukou

Recommender systems take inputs from user history, use an internal ranking algorithm to generate results and possibly optimize this ranking based on feedback. However, often the recommender system is unaware of the actual intent of the user…

Information Retrieval · Computer Science 2017-11-30 Biswarup Bhattacharya , Iftikhar Burhanuddin , Abhilasha Sancheti , Kushal Satya

Recommender systems are effective tools for mitigating information overload and have seen extensive applications across various domains. However, the single focus on utility goals proves to be inadequate in addressing real-world concerns,…

Information Retrieval · Computer Science 2024-03-05 Yuying Zhao , Yu Wang , Yunchao Liu , Xueqi Cheng , Charu Aggarwal , Tyler Derr

In this work, we aim to learn multi-level user intents from the co-interacted patterns of items, so as to obtain high-quality representations of users and items and further enhance the recommendation performance. Towards this end, we…

Information Retrieval · Computer Science 2021-10-29 Wei Yinwei , Wang Xiang , He Xiangnan , Nie Liqiang , Rui Yong , Chua Tat-Seng

Many existing industrial recommender systems are sensitive to the patterns of user-item engagement. Light users, who interact less frequently, correspond to a data sparsity problem, making it difficult for the system to accurately learn and…

Information Retrieval · Computer Science 2024-08-08 Hanjia Lyu , Hanqing Zeng , Yinglong Xia , Ren Chen , Jiebo Luo

The query suggestion or auto-completion mechanisms help users to type less while interacting with a search engine. A basic approach that ranks suggestions according to their frequency in the query logs is suboptimal. Firstly, many candidate…

Information Retrieval · Computer Science 2013-12-06 Eugene Kharitonov , Craig Macdonald , Pavel Serdyukov , Iadh Ounis

People usually have different intents for choosing items, while their preferences under the same intent may also different. In traditional collaborative filtering approaches, both intent and preference factors are usually entangled in the…

Information Retrieval · Computer Science 2023-05-19 Chao Wang , Hengshu Zhu , Dazhong Shen , Wei wu , Hui Xiong

In micro-blogging platforms, people connect and interact with others. However, due to cognitive biases, they tend to interact with like-minded people and read agreeable information only. Many efforts to make people connect with those who…

Human-Computer Interaction · Computer Science 2016-01-05 Eduardo Graells-Garrido , Mounia Lalmas , Ricardo Baeza-Yates

Industrial recommendation systems are typically composed of multiple stages, including retrieval, ranking, and blending. The retrieval stage plays a critical role in generating a high-recall set of candidate items that covers a wide range…

Information Retrieval · Computer Science 2025-07-01 Zhibo Fan , Hongtao Lin , Haoyu Chen , Bowen Deng , Hedi Xia , Yuke Yan , James Li

Sequential recommender systems have shown effective suggestions by capturing users' interest drift. There have been two groups of existing sequential models: user- and item-centric models. The user-centric models capture personalized…

Information Retrieval · Computer Science 2022-09-15 Dongmin Hyun , Chanyoung Park , Junsu Cho , Hwanjo Yu

Recommendation systems play a critical role in enhancing user experience and engagement in various online platforms. Traditional methods, such as Collaborative Filtering (CF) and Content-Based Filtering (CBF), rely heavily on past user…

Information Retrieval · Computer Science 2025-01-22 Xiaochuan Xu , Zeqiu Xu , Peiyang Yu , Jiani Wang

Serendipity-oriented recommender systems expose users to unfamiliar items to counter filter bubbles, yet mere exposure does not ensure that users will understand or appreciate the content they encounter. We propose Peer Recommendation, a…

Human-Computer Interaction · Computer Science 2026-04-21 Sosui Moribe , Taketoshi Ushiama

The challenge of balancing user relevance and content diversity in recommender systems is increasingly critical amid growing concerns about content homogeneity and reduced user engagement. In this work, we propose a novel framework that…

Information Retrieval · Computer Science 2025-06-30 Hiba Bederina , Jill-Jênn Vie

Recommender systems often struggle with over-specialization, which severely limits users' exposure to diverse content and creates filter bubbles that reduce serendipitous discovery. To address this fundamental limitation, this paper…

Information Retrieval · Computer Science 2026-05-27 Edoardo Bianchi