Search Results for author: Weiming Liu

Found 21 papers, 2 papers with code

Pareto-Optimal Estimation and Policy Learning on Short-term and Long-term Treatment Effects

no code implementations5 Mar 2024 Yingrong Wang, Anpeng Wu, Haoxuan Li, Weiming Liu, Qiaowei Miao, Ruoxuan Xiong, Fei Wu, Kun Kuang

This paper focuses on developing Pareto-optimal estimation and policy learning to identify the most effective treatment that maximizes the total reward from both short-term and long-term effects, which might conflict with each other.

Representation Learning

Personalized Behavior-Aware Transformer for Multi-Behavior Sequential Recommendation

1 code implementation22 Feb 2024 Jiajie Su, Chaochao Chen, Zibin Lin, Xi Li, Weiming Liu, Xiaolin Zheng

To tackle these challenges, we propose a Personalized Behavior-Aware Transformer framework (PBAT) for MBSR problem, which models personalized patterns and multifaceted sequential collaborations in a novel way to boost recommendation performance.

Sequential Recommendation

Learning Uniform Clusters on Hypersphere for Deep Graph-level Clustering

no code implementations23 Nov 2023 Mengling Hu, Chaochao Chen, Weiming Liu, Xinyi Zhang, Xinting Liao, Xiaolin Zheng

However, most existing graph clustering methods focus on node-level clustering, i. e., grouping nodes in a single graph into clusters.

Clustering Contrastive Learning +2

Federated Learning for Short Text Clustering

no code implementations23 Nov 2023 Mengling Hu, Chaochao Chen, Weiming Liu, Xinting Liao, Xiaolin Zheng

The robust short text clustering module aims to train an effective short text clustering model with local data in each client.

Clustering Federated Learning +1

In-processing User Constrained Dominant Sets for User-Oriented Fairness in Recommender Systems

no code implementations4 Sep 2023 Zhongxuan Han, Chaochao Chen, Xiaolin Zheng, Weiming Liu, Jun Wang, Wenjie Cheng, Yuyuan Li

By combining the fairness loss with the original backbone model loss, we address the UOF issue and maintain the overall recommendation performance simultaneously.

Fairness Recommendation Systems

Joint Local Relational Augmentation and Global Nash Equilibrium for Federated Learning with Non-IID Data

no code implementations17 Aug 2023 Xinting Liao, Chaochao Chen, Weiming Liu, Pengyang Zhou, Huabin Zhu, Shuheng Shen, Weiqiang Wang, Mengling Hu, Yanchao Tan, Xiaolin Zheng

In server, GNE reaches an agreement among inconsistent and discrepant model deviations from clients to server, which encourages the global model to update in the direction of global optimum without breaking down the clients optimization toward their local optimums.

Federated Learning

HyperFed: Hyperbolic Prototypes Exploration with Consistent Aggregation for Non-IID Data in Federated Learning

no code implementations26 Jul 2023 Xinting Liao, Weiming Liu, Chaochao Chen, Pengyang Zhou, Huabin Zhu, Yanchao Tan, Jun Wang, Yue Qi

Firstly, HPTI in the server constructs uniformly distributed and fixed class prototypes, and shares them with clients to match class statistics, further guiding consistent feature representation for local clients.

Federated Learning

PPGenCDR: A Stable and Robust Framework for Privacy-Preserving Cross-Domain Recommendation

no code implementations11 May 2023 Xinting Liao, Weiming Liu, Xiaolin Zheng, Binhui Yao, Chaochao Chen

Privacy-preserving cross-domain recommendation (PPCDR) refers to preserving the privacy of users when transferring the knowledge from source domain to target domain for better performance, which is vital for the long-term development of recommender systems.

Generative Adversarial Network Privacy Preserving +1

Entire Space Counterfactual Learning: Tuning, Analytical Properties and Industrial Applications

no code implementations20 Oct 2022 Hao Wang, Zhichao Chen, Jiajun Fan, Yuxin Huang, Weiming Liu, Xinggao Liu

As a basic research problem for building effective recommender systems, post-click conversion rate (CVR) estimation has long been plagued by sample selection bias and data sparsity issues.

Auxiliary Learning counterfactual +2

DDGHM: Dual Dynamic Graph with Hybrid Metric Training for Cross-Domain Sequential Recommendation

no code implementations21 Sep 2022 Xiaolin Zheng, Jiajie Su, Weiming Liu, Chaochao Chen

However, the short interaction sequences limit the performance of existing SR. To solve this problem, we focus on Cross-Domain Sequential Recommendation (CDSR) in this paper, which aims to leverage information from other domains to improve the sequential recommendation performance of a single domain.

Metric Learning Sequential Recommendation

Exploiting Variational Domain-Invariant User Embedding for Partially Overlapped Cross Domain Recommendation

no code implementations13 May 2022 Weiming Liu, Xiaolin Zheng, Mengling Hu, Chaochao Chen

Most of the existing CDR models assume that both the source and target domains share the same overlapped user set for knowledge transfer.

Recommendation Systems Transfer Learning +1

Leveraging Distribution Alignment via Stein Path for Cross-Domain Cold-Start Recommendation

no code implementations NeurIPS 2021 Weiming Liu, Jiajie Su, Chaochao Chen, Xiaolin Zheng

To address this issue, we propose DisAlign, a cross-domain recommendation framework for the CDCSR problem, which utilizes both rating and auxiliary representations from the source domain to improve the recommendation performance of the target domain.

Recommendation Systems

Equivalence Analysis between Counterfactual Regret Minimization and Online Mirror Descent

no code implementations11 Oct 2021 Weiming Liu, Huacong Jiang, Bin Li, Houqiang Li

Follow-the-Regularized-Lead (FTRL) and Online Mirror Descent (OMD) are regret minimization algorithms for Online Convex Optimization (OCO), they are mathematically elegant but less practical in solving Extensive-Form Games (EFGs).

counterfactual

Actor-Critic Policy Optimization in a Large-Scale Imperfect-Information Game

no code implementations ICLR 2022 Haobo Fu, Weiming Liu, Shuang Wu, Yijia Wang, Tao Yang, Kai Li, Junliang Xing, Bin Li, Bo Ma, Qiang Fu, Yang Wei

The deep policy gradient method has demonstrated promising results in many large-scale games, where the agent learns purely from its own experience.

counterfactual Policy Gradient Methods

Model-free Neural Counterfactual Regret Minimization with Bootstrap Learning

no code implementations3 Dec 2020 Weiming Liu, Bin Li, Julian Togelius

Experimental results show that Neural ReCFR-B is competitive with the state-of-the-art neural CFR algorithms at a much lower training cost.

counterfactual

Learn a Prior for RHEA for Better Online Planning

no code implementations14 Feb 2019 Xin Tong, Weiming Liu, Bin Li

In this paper, we propose to learn a prior for RHEA in an offline manner by training a value network and a policy network.

Evolutionary Algorithms OpenAI Gym

On Redundant Topological Constraints

no code implementations3 Mar 2014 Sanjiang Li, Zhiguo Long, Weiming Liu, Matt Duckham, Alan Both

In this paper, we show that this problem is in general intractable, but becomes tractable if $\Gamma$ is over a tractable subalgebra $\mathcal{S}$ of a qualitative calculus.

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