Search Results for author: Joemon M. Jose

Found 13 papers, 3 papers with code

Reinforcement Learning-based Recommender Systems with Large Language Models for State Reward and Action Modeling

no code implementations25 Mar 2024 Jie Wang, Alexandros Karatzoglou, Ioannis Arapakis, Joemon M. Jose

The LE is learned from a subset of user-item interaction data, thus reducing the need for large training data, and can synthesise user feedback for offline data by: (i) acting as a state model that produces high quality states that enrich the user representation, and (ii) functioning as a reward model to accurately capture nuanced user preferences on actions.

Offline RL Reinforcement Learning (RL) +1

Cross-modal Semantic Enhanced Interaction for Image-Sentence Retrieval

no code implementations17 Oct 2022 Xuri Ge, Fuhai Chen, Songpei Xu, Fuxiang Tao, Joemon M. Jose

To correlate the context of objects with the textual context, we further refine the visual semantic representation via the cross-level object-sentence and word-image based interactive attention.

Object Retrieval +1

TransRec: Learning Transferable Recommendation from Mixture-of-Modality Feedback

no code implementations13 Jun 2022 Jie Wang, Fajie Yuan, Mingyue Cheng, Joemon M. Jose, Chenyun Yu, Beibei Kong, Xiangnan He, Zhijin Wang, Bo Hu, Zang Li

That is, the users and the interacted items are represented by their unique IDs, which are generally not shareable across different systems or platforms.

Recommendation Systems Transfer Learning

MGRR-Net: Multi-level Graph Relational Reasoning Network for Facial Action Units Detection

no code implementations4 Apr 2022 Xuri Ge, Joemon M. Jose, Songpei Xu, Xiao Liu, Hu Han

While the region-level feature learning from local face patches features via graph neural network can encode the correlation across different AUs, the pixel-wise and channel-wise feature learning via graph attention network can enhance the discrimination ability of AU features from global face features.

Graph Attention Relational Reasoning

Automatic Facial Paralysis Estimation with Facial Action Units

no code implementations3 Mar 2022 Xuri Ge, Joemon M. Jose, Pengcheng Wang, Arunachalam Iyer, Xiao Liu, Hu Han

In this paper, we propose a novel Adaptive Local-Global Relational Network (ALGRNet) for facial AU detection and use it to classify facial paralysis severity.

Supervised Advantage Actor-Critic for Recommender Systems

no code implementations5 Nov 2021 Xin Xin, Alexandros Karatzoglou, Ioannis Arapakis, Joemon M. Jose

However, the direct use of RL algorithms in the RS setting is impractical due to challenges like off-policy training, huge action spaces and lack of sufficient reward signals.

Q-Learning Reinforcement Learning (RL) +1

Structured Multi-modal Feature Embedding and Alignment for Image-Sentence Retrieval

no code implementations5 Aug 2021 Xuri Ge, Fuhai Chen, Joemon M. Jose, Zhilong Ji, Zhongqin Wu, Xiao Liu

In this work, we propose to address the above issue from two aspects: (i) constructing intrinsic structure (along with relations) among the fragments of respective modalities, e. g., "dog $\to$ play $\to$ ball" in semantic structure for an image, and (ii) seeking explicit inter-modal structural and semantic correspondence between the visual and textual modalities.

Retrieval Semantic correspondence +1

Graph Highway Networks

1 code implementation9 Apr 2020 Xin Xin, Alexandros Karatzoglou, Ioannis Arapakis, Joemon M. Jose

Graph Convolution Networks (GCN) are widely used in learning graph representations due to their effectiveness and efficiency.

A Simple Convolutional Generative Network for Next Item Recommendation

3 code implementations15 Aug 2018 Fajie Yuan, Alexandros Karatzoglou, Ioannis Arapakis, Joemon M. Jose, Xiangnan He

Convolutional Neural Networks (CNNs) have been recently introduced in the domain of session-based next item recommendation.

Recommendation Systems

Improving Negative Sampling for Word Representation using Self-embedded Features

no code implementations26 Oct 2017 Long Chen, Fajie Yuan, Joemon M. Jose, Wei-Nan Zhang

Although the word-popularity based negative sampler has shown superb performance in the skip-gram model, the theoretical motivation behind oversampling popular (non-observed) words as negative samples is still not well understood.

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