Search Results for author: Xiaocong Chen

Found 21 papers, 2 papers with code

Uncertainty-aware Distributional Offline Reinforcement Learning

no code implementations26 Mar 2024 Xiaocong Chen, Siyu Wang, Tong Yu, Lina Yao

Offline reinforcement learning (RL) presents distinct challenges as it relies solely on observational data.

Offline RL reinforcement-learning +1

Retentive Decision Transformer with Adaptive Masking for Reinforcement Learning based Recommendation Systems

no code implementations26 Mar 2024 Siyu Wang, Xiaocong Chen, Lina Yao

Reinforcement Learning-based Recommender Systems (RLRS) have shown promise across a spectrum of applications, from e-commerce platforms to streaming services.

Computational Efficiency Decision Making +1

On the Opportunities and Challenges of Offline Reinforcement Learning for Recommender Systems

no code implementations22 Aug 2023 Xiaocong Chen, Siyu Wang, Julian McAuley, Dietmar Jannach, Lina Yao

Offline reinforcement learning empowers agents to glean insights from offline datasets and deploy learned policies in online settings.

Recommendation Systems reinforcement-learning

Causal Disentangled Variational Auto-Encoder for Preference Understanding in Recommendation

no code implementations17 Apr 2023 Siyu Wang, Xiaocong Chen, Quan Z. Sheng, Yihong Zhang, Lina Yao

This paper introduces the Causal Disentangled Variational Auto-Encoder (CaD-VAE), a novel approach for learning causal disentangled representations from interaction data in recommender systems.

Decision Making Disentanglement +1

Intrinsically Motivated Reinforcement Learning based Recommendation with Counterfactual Data Augmentation

no code implementations17 Sep 2022 Xiaocong Chen, Siyu Wang, Lina Yao, Lianyong Qi, Yong Li

It is more challenging to balance the exploration and exploitation in DRL RS where RS agent need to deeply explore the informative trajectories and exploit them efficiently in the context of recommender systems.

counterfactual Data Augmentation +3

Contrastive Counterfactual Learning for Causality-aware Interpretable Recommender Systems

no code implementations13 Aug 2022 Guanglin Zhou, Chengkai Huang, Xiaocong Chen, Xiwei Xu, Chen Wang, Liming Zhu, Lina Yao

Recognizing that confounders may be elusive, we propose a contrastive self-supervised learning to minimize exposure bias, employing inverse propensity scores and expanding the positive sample set.

Causal Inference counterfactual +2

Plug-and-Play Model-Agnostic Counterfactual Policy Synthesis for Deep Reinforcement Learning based Recommendation

no code implementations10 Aug 2022 Siyu Wang, Xiaocong Chen, Lina Yao, Sally Cripps, Julian McAuley

Recent advances in recommender systems have proved the potential of Reinforcement Learning (RL) to handle the dynamic evolution processes between users and recommender systems.

counterfactual Data Augmentation +3

Model-agnostic Counterfactual Synthesis Policy for Interactive Recommendation

no code implementations1 Apr 2022 Siyu Wang, Xiaocong Chen, Lina Yao

Recent advances have convinced that the ability of reinforcement learning to handle the dynamic process can be effectively applied in the interactive recommendation.

counterfactual reinforcement-learning +1

Adversarial Robustness of Deep Reinforcement Learning based Dynamic Recommender Systems

no code implementations2 Dec 2021 Siyu Wang, Yuanjiang Cao, Xiaocong Chen, Lina Yao, Xianzhi Wang, Quan Z. Sheng

Finally, we study the attack strength and frequency of adversarial examples and evaluate our model on standard datasets with multiple crafting methods.

Adversarial Robustness counterfactual +3

Locality-Sensitive Experience Replay for Online Recommendation

no code implementations21 Oct 2021 Xiaocong Chen, Lina Yao, Xianzhi Wang, Julian McAuley

Existing studies encourage the agent to learn from past experience via experience replay (ER).

Recommendation Systems

A Survey of Deep Reinforcement Learning in Recommender Systems: A Systematic Review and Future Directions

no code implementations8 Sep 2021 Xiaocong Chen, Lina Yao, Julian McAuley, Guanglin Zhou, Xianzhi Wang

In light of the emergence of deep reinforcement learning (DRL) in recommender systems research and several fruitful results in recent years, this survey aims to provide a timely and comprehensive overview of the recent trends of deep reinforcement learning in recommender systems.

Recommendation Systems reinforcement-learning +1

Generative Adversarial Reward Learning for Generalized Behavior Tendency Inference

no code implementations3 May 2021 Xiaocong Chen, Lina Yao, Xianzhi Wang, Aixin Sun, Wenjie Zhang, Quan Z. Sheng

Recent advances in reinforcement learning have inspired increasing interest in learning user modeling adaptively through dynamic interactions, e. g., in reinforcement learning based recommender systems.

Recommendation Systems reinforcement-learning +2

Adversarial Attacks and Detection on Reinforcement Learning-Based Interactive Recommender Systems

no code implementations14 Jun 2020 Yuanjiang Cao, Xiaocong Chen, Lina Yao, Xianzhi Wang, Wei Emma Zhang

Finally, we study the attack strength and frequency of adversarial examples and evaluate our model on standard datasets with multiple crafting methods.

Recommendation Systems reinforcement-learning +1

Knowledge-guided Deep Reinforcement Learning for Interactive Recommendation

no code implementations17 Apr 2020 Xiaocong Chen, Chaoran Huang, Lina Yao, Xianzhi Wang, Wei Liu, Wenjie Zhang

Interactive recommendation aims to learn from dynamic interactions between items and users to achieve responsiveness and accuracy.

Decision Making Knowledge-Aware Recommendation +3

Residual Attention U-Net for Automated Multi-Class Segmentation of COVID-19 Chest CT Images

no code implementations12 Apr 2020 Xiaocong Chen, Lina Yao, Yu Zhang

The novel coronavirus disease 2019 (COVID-19) has been spreading rapidly around the world and caused significant impact on the public health and economy.

Computed Tomography (CT) Segmentation

Multi-task Generative Adversarial Learning on Geometrical Shape Reconstruction from EEG Brain Signals

2 code implementations31 Jul 2019 Xiang Zhang, Xiaocong Chen, Manqing Dong, Huan Liu, Chang Ge, Lina Yao

In light of this, we propose a novel multi-task generative adversarial network to convert the individual's EEG signals evoked by geometrical shapes to the original geometry.

EEG Generative Adversarial Network +1

Deep Neural Network Hyperparameter Optimization with Orthogonal Array Tuning

1 code implementation31 Jul 2019 Xiang Zhang, Xiaocong Chen, Lina Yao, Chang Ge, Manqing Dong

Deep learning algorithms have achieved excellent performance lately in a wide range of fields (e. g., computer version).

Bayesian Optimization Hyperparameter Optimization

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