Search Results for author: Long Xia

Found 19 papers, 4 papers with code

HiGPT: Heterogeneous Graph Language Model

1 code implementation25 Feb 2024 Jiabin Tang, Yuhao Yang, Wei Wei, Lei Shi, Long Xia, Dawei Yin, Chao Huang

However, existing frameworks for heterogeneous graph learning have limitations in generalizing across diverse heterogeneous graph datasets.

Graph Learning Language Modelling +1

UrbanGPT: Spatio-Temporal Large Language Models

1 code implementation25 Feb 2024 Zhonghang Li, Lianghao Xia, Jiabin Tang, Yong Xu, Lei Shi, Long Xia, Dawei Yin, Chao Huang

These findings highlight the potential of building large language models for spatio-temporal learning, particularly in zero-shot scenarios where labeled data is scarce.

Text-Video Retrieval via Variational Multi-Modal Hypergraph Networks

no code implementations6 Jan 2024 Qian Li, Lixin Su, Jiashu Zhao, Long Xia, Hengyi Cai, Suqi Cheng, Hengzhu Tang, Junfeng Wang, Dawei Yin

Compared to conventional textual retrieval, the main obstacle for text-video retrieval is the semantic gap between the textual nature of queries and the visual richness of video content.

Retrieval Variational Inference +1

Consecutive Knowledge Meta-Adaptation Learning for Unsupervised Medical Diagnosis

no code implementations21 Sep 2022 Yumin Zhang, Yawen Hou, Xiuyi Chen, Hongyuan Yu, Long Xia

In the SAP, the semantic knowledge learned from the source lesion domain is transferred to consecutive target lesion domains.

Medical Diagnosis Unsupervised Domain Adaptation

Sequential Recommendation with User Evolving Preference Decomposition

no code implementations31 Mar 2022 Weiqi Shao, Xu Chen, Long Xia, Jiashu Zhao, Dawei Yin

To solve this problem, in this paper, we propose a novel sequential recommender model via decomposing and modeling user independent preferences.

Sequential Recommendation

User behavior understanding in real world settings

no code implementations6 Dec 2021 Weiqi Shao, Xu Chen, Jiashu Zhao, Long Xia, Dawei Yin

It is necessary to learn a dynamic group of representations according the item groups in a user historical behavior.

Gumble Softmax For User Behavior Modeling

no code implementations6 Dec 2021 Weiqi Shao, Xu Chen, Jiashu Zhao, Long Xia, Dawei Yin

We propose a sequential model with dynamic number of representations for recommendation systems (RDRSR).

Sequential Recommendation

Data-Efficient Reinforcement Learning for Malaria Control

no code implementations4 May 2021 Lixin Zou, Long Xia, Linfang Hou, Xiangyu Zhao, Dawei Yin

This work introduces a practical, data-efficient policy learning method, named Variance-Bonus Monte Carlo Tree Search~(VB-MCTS), which can copy with very little data and facilitate learning from scratch in only a few trials.

Decision Making Model-based Reinforcement Learning +2

Neural Interactive Collaborative Filtering

1 code implementation4 Jul 2020 Lixin Zou, Long Xia, Yulong Gu, Xiangyu Zhao, Weidong Liu, Jimmy Xiangji Huang, Dawei Yin

Therefore, the proposed exploration policy, to balance between learning the user profile and making accurate recommendations, can be directly optimized by maximizing users' long-term satisfaction with reinforcement learning.

Collaborative Filtering Meta-Learning +2

Off-policy Learning for Multiple Loggers

no code implementations23 Jul 2019 Li He, Long Xia, Wei Zeng, Zhi-Ming Ma, Yihong Zhao, Dawei Yin

To make full use of such historical data, learning policies from multiple loggers becomes necessary.

counterfactual

Toward Simulating Environments in Reinforcement Learning Based Recommendations

no code implementations27 Jun 2019 Xiangyu Zhao, Long Xia, Lixin Zou, Dawei Yin, Jiliang Tang

Thus, it calls for a user simulator that can mimic real users' behaviors where we can pre-train and evaluate new recommendation algorithms.

Generative Adversarial Network Recommendation Systems +2

Reinforcement Learning to Optimize Long-term User Engagement in Recommender Systems

no code implementations13 Feb 2019 Lixin Zou, Long Xia, Zhuoye Ding, Jiaxing Song, Weidong Liu, Dawei Yin

Though reinforcement learning~(RL) naturally fits the problem of maximizing the long term rewards, applying RL to optimize long-term user engagement is still facing challenges: user behaviors are versatile and difficult to model, which typically consists of both instant feedback~(e. g. clicks, ordering) and delayed feedback~(e. g. dwell time, revisit); in addition, performing effective off-policy learning is still immature, especially when combining bootstrapping and function approximation.

Recommendation Systems reinforcement-learning +1

Whole-Chain Recommendations

no code implementations11 Feb 2019 Xiangyu Zhao, Long Xia, Linxin Zou, Hui Liu, Dawei Yin, Jiliang Tang

With the recent prevalence of Reinforcement Learning (RL), there have been tremendous interests in developing RL-based recommender systems.

Multi-agent Reinforcement Learning Recommendation Systems +1

Deep reinforcement learning for search, recommendation, and online advertising: a survey

no code implementations18 Dec 2018 Xiangyu Zhao, Long Xia, Jiliang Tang, Dawei Yin

Search, recommendation, and online advertising are the three most important information-providing mechanisms on the web.

reinforcement-learning Reinforcement Learning (RL)

Deep Reinforcement Learning for Page-wise Recommendations

no code implementations7 May 2018 Xiangyu Zhao, Long Xia, Liang Zhang, Zhuoye Ding, Dawei Yin, Jiliang Tang

In particular, we propose a principled approach to jointly generate a set of complementary items and the corresponding strategy to display them in a 2-D page; and propose a novel page-wise recommendation framework based on deep reinforcement learning, DeepPage, which can optimize a page of items with proper display based on real-time feedback from users.

Recommendation Systems reinforcement-learning +1

Deep Reinforcement Learning for List-wise Recommendations

7 code implementations30 Dec 2017 Xiangyu Zhao, Liang Zhang, Long Xia, Zhuoye Ding, Dawei Yin, Jiliang Tang

Recommender systems play a crucial role in mitigating the problem of information overload by suggesting users' personalized items or services.

Recommendation Systems reinforcement-learning +1

A Surrogate-based Generic Classifier for Chinese TV Series Reviews

no code implementations8 Nov 2016 Yu-feng Ma, Long Xia, Wenqi Shen, Mi Zhou, Weiguo Fan

With the emerging of various online video platforms like Youtube, Youku and LeTV, online TV series' reviews become more and more important both for viewers and producers.

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