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Learning from human feedback has enabled the alignment of language models (LMs) with human preferences. However, collecting human preferences is expensive and time-consuming, with highly variable annotation quality. An appealing alternative…

In click-through rate prediction, click-through rate prediction is used to model users' interests. However, most of the existing CTR prediction methods are mainly based on the ID modality. As a result, they are unable to comprehensively…

Information Retrieval · Computer Science 2025-09-01 Xiaoxi Cui , Weihai Lu , Yu Tong , Yiheng Li , Zhejun Zhao

To capture user preference, transformer models have been widely applied to model sequential user behavior data. The core of transformer architecture lies in the self-attention mechanism, which computes the pairwise attention scores in a…

Information Retrieval · Computer Science 2024-04-05 Zhen Tian , Wayne Xin Zhao , Changwang Zhang , Xin Zhao , Zhongrui Ma , Ji-Rong Wen

Multi-modal recommendation (MMR) enriches item representations by introducing item content, e.g., visual and textual descriptions, to improve upon interaction-only recommenders. The success of MMR hinges on aligning these content modalities…

Information Retrieval · Computer Science 2026-04-06 Jing Du , Zesheng Ye , Congbo Ma , Feng Liu , Flora. D. Salim

While many production-ready and robust algorithms are available for the task of recommendation systems, many of these systems do not take the order of user's consumption into account. The order of consumption can be very useful and matters…

Information Retrieval · Computer Science 2022-05-03 Mehdi Soleiman Nejad , Meysam Varasteh , Hadi Moradi , Mohammad Amin Sadeghi

Multi-behavior recommendation (MBR) has garnered growing attention recently due to its ability to mitigate the sparsity issue by inferring user preferences from various auxiliary behaviors to improve predictions for the target behavior.…

Information Retrieval · Computer Science 2024-12-20 Yabo Yin , Xiaofei Zhu , Wenshan Wang , Yihao Zhang , Pengfei Wang , Yixing Fan , Jiafeng Guo

Data sparsity is an important issue for click-through rate (CTR) prediction, particularly when user-item interactions is too sparse to learn a reliable model. Recently, many works on cross-domain CTR (CDCTR) prediction have been developed…

Information Retrieval · Computer Science 2023-05-10 Xu Chen , Zida Cheng , Shuai Xiao , Xiaoyi Zeng , Weilin Huang

The exposure sequence is being actively studied for user interest modeling in Click-Through Rate (CTR) prediction. However, the existing methods for exposure sequence modeling bring extensive computational burden and neglect noise problems,…

Information Retrieval · Computer Science 2022-05-02 Xiaoxiao Xu , Zhiwei Fang , Qian Yu , Ruoran Huang , \\Chaosheng Fan , Yong Li , Yang He , Changping Peng , Zhangang Lin , Jingping Shao

User recommendation systems enhance user engagement by encouraging users to act as inviters to interact with other users (invitees), potentially fostering information propagation. Conventional recommendation methods typically focus on…

Information Retrieval · Computer Science 2025-08-20 Hongru Hou , Jiachen Sun , Wenqing Lin , Wendong Bi , Xiangrong Wang , Deqing Yang

Click-through rate (CTR) prediction is crucial in recommendation and online advertising systems. Existing methods usually model user behaviors, while ignoring the informative context which influences the user to make a click decision, e.g.,…

Information Retrieval · Computer Science 2023-01-31 Xiang Li , Shuwei Chen , Jian Dong , Jin Zhang , Yongkang Wang , Xingxing Wang , Dong Wang

Prompt learning has attracted increasing attention in the graph domain as a means to bridge the gap between pretext and downstream tasks. Existing studies on heterogeneous graph prompting typically use feature prompts to modify node…

Machine Learning · Computer Science 2025-02-14 Feiyang Wang , Zhongbao Zhang , Junda Ye , Li Sun , Jianzhong Qi

Multimodal recommendation combines the user historical behaviors with the modal features of items to capture the tangible user preferences, presenting superior performance compared to the conventional ID-based recommender systems. However,…

Information Retrieval · Computer Science 2026-01-27 Yuzhuo Dang , Xin Zhang , Zhiqiang Pan , Yuxiao Duan , Wanyu Chen , Fei Cai , Honghui Chen

Conversion Rate (\emph{CVR}) prediction in modern industrial e-commerce platforms is becoming increasingly important, which directly contributes to the final revenue. In order to address the well-known sample selection bias (\emph{SSB}) and…

Machine Learning · Computer Science 2021-04-21 Hong Wen , Jing Zhang , Fuyu Lv , Wentian Bao , Tianyi Wang , Zulong Chen

The Session-Based Recommendation System aims to predict the user's next click based on their previous session sequence. The current studies generally learn user preferences according to the transitions of items in the user's session…

Information Retrieval · Computer Science 2023-10-06 Jinpeng Chen , Haiyang Li , Xudong Zhang , Fan Zhang , Senzhang Wang , Kaimin Wei , Jiaqi Ji

Click-through rate (CTR) prediction is crucial for personalized online services. Sample-level retrieval-based models, such as RIM, have demonstrated remarkable performance. However, they face challenges including inference inefficiency and…

Information Retrieval · Computer Science 2024-10-07 Huanshuo Liu , Bo Chen , Menghui Zhu , Jianghao Lin , Jiarui Qin , Yang Yang , Hao Zhang , Ruiming Tang

User behavior sequences in modern recommendation systems exhibit significant length heterogeneity, ranging from sparse short-term interactions to rich long-term histories. While longer sequences provide more context, we observe that…

Artificial Intelligence · Computer Science 2026-01-28 Zhicheng Zhang , Zhaocheng Du , Jieming Zhu , Jiwei Tang , Fengyuan Lu , Wang Jiaheng , Song-Li Wu , Qianhui Zhu , Jingyu Li , Hai-Tao Zheng , Zhenhua Dong

Large language models (LLMs) have recently demonstrated strong potential for sequential recommendation. However, current LLM-based approaches face critical limitations in modeling users' long-term and diverse interests. First, due to…

Information Retrieval · Computer Science 2025-10-30 Jingyi Zhou , Cheng Chen , Kai Zuo , Manjie Xu , Zhendong Fu , Yibo Chen , Xu Tang , Yao Hu

With many frameworks based on message passing neural networks proposed to predict molecular and bulk properties, machine learning methods have tremendously shifted the paradigms of computational sciences underpinning physics, material…

Machine Learning · Computer Science 2021-09-03 Zun Wang , Chong Wang , Sibo Zhao , Yong Xu , Shaogang Hao , Chang Yu Hsieh , Bing-Lin Gu , Wenhui Duan

Traditional sequential recommendation (SR) methods heavily rely on explicit item IDs to capture user preferences over time. This reliance introduces critical limitations in cold-start scenarios and domain transfer tasks, where unseen items…

Information Retrieval · Computer Science 2025-02-20 Wuhan Chen , Zongwei Wang , Min Gao , Xin Xia , Feng Jiang , Junhao Wen

With the widespread application of personalized online services, click-through rate (CTR) prediction has received more and more attention and research. The most prominent features of CTR prediction are its multi-field categorical data…

Information Retrieval · Computer Science 2023-08-04 Jianghao Lin , Yanru Qu , Wei Guo , Xinyi Dai , Ruiming Tang , Yong Yu , Weinan Zhang