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Knowledge tracing (KT) aims to leverage students' learning histories to estimate their mastery levels on a set of pre-defined skills, based on which the corresponding future performance can be accurately predicted. As an important way of…

Artificial Intelligence · Computer Science 2023-06-07 Fucai Ke , Weiqing Wang , Weicong Tan , Lan Du , Yuan Jin , Yujin Huang , Hongzhi Yin

Sequential recommendation models have achieved state-of-the-art performance using self-attention mechanism. It has since been found that moving beyond only using item ID and positional embeddings leads to a significant accuracy boost when…

Information Retrieval · Computer Science 2024-09-10 Linsey Pang , Amir Hossein Raffiee , Wei Liu , Keld Lundgaard

Training LLMs as interactive agents for multi-turn decision-making remains challenging, particularly in long-horizon tasks with sparse and delayed rewards, where agents must execute extended sequences of actions before receiving meaningful…

Machine Learning · Computer Science 2026-05-12 Jiangweizhi Peng , Yuanxin Liu , Ruida Zhou , Charles Fleming , Zhaoran Wang , Alfredo Garcia , Mingyi Hong

Hierarchical agents have the potential to solve sequential decision making tasks with greater sample efficiency than their non-hierarchical counterparts because hierarchical agents can break down tasks into sets of subtasks that only…

Artificial Intelligence · Computer Science 2019-09-05 Andrew Levy , George Konidaris , Robert Platt , Kate Saenko

In multi-agent reinforcement learning (MARL), the Centralized Training with Decentralized Execution (CTDE) framework is pivotal but struggles due to a gap: global state guidance in training versus reliance on local observations in…

Artificial Intelligence · Computer Science 2024-08-26 Pu Feng , Junkang Liang , Size Wang , Xin Yu , Xin Ji , Yiting Chen , Kui Zhang , Rongye Shi , Wenjun Wu

The training paradigm integrating large language models (LLM) is gradually reshaping sequential recommender systems (SRS) and has shown promising results. However, most existing LLM-enhanced methods rely on rich textual information on the…

Information Retrieval · Computer Science 2024-10-17 Dugang Liu , Shenxian Xian , Xiaolin Lin , Xiaolian Zhang , Hong Zhu , Yuan Fang , Zhen Chen , Zhong Ming

Multi-behavior sequential recommendation (MBSR) aims to incorporate behavior types of interactions for better recommendations. Existing approaches focus on the next-item prediction objective, neglecting the value of integrating the target…

Information Retrieval · Computer Science 2024-07-31 Zihan Liu , Yupeng Hou , Julian McAuley

Large Language Models (LLMs) have recently emerged as promising tools for recommendation thanks to their advanced textual understanding ability and context-awareness. Despite the current practice of training and evaluating LLM-based…

Information Retrieval · Computer Science 2025-06-12 Sein Kim , Hongseok Kang , Kibum Kim , Jiwan Kim , Donghyun Kim , Minchul Yang , Kwangjin Oh , Julian McAuley , Chanyoung Park

Meta-learning has been proposed as a framework to address the challenging few-shot learning setting. The key idea is to leverage a large number of similar few-shot tasks in order to learn how to adapt a base-learner to a new task for which…

Computer Vision and Pattern Recognition · Computer Science 2019-10-10 Qianru Sun , Yaoyao Liu , Zhaozheng Chen , Tat-Seng Chua , Bernt Schiele

Hierarchical text classification (HTC) is a special sub-task of multi-label classification (MLC) whose taxonomy is constructed as a tree and each sample is assigned with at least one path in the tree. Latest HTC models contain three…

Computation and Language · Computer Science 2024-08-13 Zhijian Chen , Zhonghua Li , Jianxin Yang , Ye Qi

Multitask learning (MTL) aims to develop a unified model that can handle a set of closely related tasks simultaneously. By optimizing the model across multiple tasks, MTL generally surpasses its non-MTL counterparts in terms of…

Machine Learning · Computer Science 2023-10-11 Chin-Chia Michael Yeh , Xin Dai , Yan Zheng , Junpeng Wang , Huiyuan Chen , Yujie Fan , Audrey Der , Zhongfang Zhuang , Liang Wang , Wei Zhang

Advanced recommender systems usually involve multiple domains (such as scenarios or categories) for various marketing strategies, and users interact with them to satisfy diverse demands. The goal of multi-domain recommendation (MDR) is to…

Information Retrieval · Computer Science 2023-04-20 Zixuan Xu , Penghui Wei , Shaoguo Liu , Weimin Zhang , Liang Wang , Bo Zheng

We introduce $\textbf{Hierarchical Taylor Series-based Continual Learning (HTCL)}$, a framework that couples fast local adaptation with conservative, second-order global consolidation to address the high variance introduced by random task…

Machine Learning · Computer Science 2026-02-04 Protik Nag , Krishnan Raghavan , Vignesh Narayanan

Hierarchical models are utilized in a wide variety of problems which are characterized by task hierarchies, where predictions on smaller subtasks are useful for trying to predict a final task. Typically, neural networks are first trained…

With the advent of deep learning, many dense prediction tasks, i.e. tasks that produce pixel-level predictions, have seen significant performance improvements. The typical approach is to learn these tasks in isolation, that is, a separate…

Computer Vision and Pattern Recognition · Computer Science 2021-01-26 Simon Vandenhende , Stamatios Georgoulis , Wouter Van Gansbeke , Marc Proesmans , Dengxin Dai , Luc Van Gool

In order to create machine learning systems that serve a variety of users well, it is vital to not only achieve high average performance but also ensure equitable outcomes across diverse groups. However, most machine learning methods are…

Machine Learning · Computer Science 2024-03-01 Atharva Kulkarni , Lucio Dery , Amrith Setlur , Aditi Raghunathan , Ameet Talwalkar , Graham Neubig

Automatic topic classification has been studied extensively to assist managing and indexing scientific documents in a digital collection. With the large number of topics being available in recent years, it has become necessary to arrange…

Computation and Language · Computer Science 2022-11-08 Mobashir Sadat , Cornelia Caragea

Many important classification problems in the real-world consist of a large number of closely related categories in a hierarchical structure or taxonomy. Hierarchical multi-label text classification (HMTC) with higher accuracy over large…

Computation and Language · Computer Science 2022-04-19 Pengfei Gao , Jingpeng Zhao , Yinglong Ma , Ahmad Tanvir , Beihong Jin

In Meta-Reinforcement Learning (meta-RL) an agent is trained on a set of tasks to prepare for and learn faster in new, unseen, but related tasks. The training tasks are usually hand-crafted to be representative of the expected distribution…

Machine Learning · Computer Science 2021-07-02 Ricardo Luna Gutierrez , Matteo Leonetti

Generative models have gained significant attention in multivariate time series forecasting (MTS), particularly due to their ability to generate high-fidelity samples. Forecasting the probability distribution of multivariate time series is…

Machine Learning · Computer Science 2025-02-13 Shibo Feng , Peilin Zhao , Liu Liu , Pengcheng Wu , Zhiqi Shen