activity
20242026
most citedDiffusion Models for Tabular Data Imputation and Synthetic Data Generation

19 citations · 36 across the 15 of their papers we have counts for

collaborators

16 papers

cs.IR2026

RecRec: Latent Interests Recursive Reasoning for Sequential Recommendation

Wenhao Deng, Junchen Fu, Hanwen Du +6

Sequential recommender systems rely on a single forward pass to encode user interaction histories and predict the next item. Increasing inference-time computation through latent re…

cs.IR2026

Stream-aware Side Adaptation for Large Pre-trained Multimodal Embedding Models in Sequential Recommendation

Junchen Fu, Kaiwen Zheng, Ioannis Arapakis +4

Recently, large pretrained multimodal embedding models such as Qwen3-VL Embedding have shown strong promise for sequential recommendation, as they provide reusable semantic item re…

cs.IR2026

The 2nd EReL@MIR Workshop on Efficient Representation Learning for Multimodal Information Retrieval

Junchen Fu, Xuri Ge, Xin Xin +6

Multimodal representation learning has attracted increasing attention in AI, driven by the strong performance of large, pretrained multimodal foundation models such as Qwen, LLaVA,…

cs.MM2026

Benchmarking Multimodal Large Language Models for Missing Modality Completion in Product Catalogues

Junchen Fu, Wenhao Deng, Kaiwen Zheng +5

Missing-modality information on e-commerce platforms, such as absent product images or textual descriptions, often arises from annotation errors or incomplete metadata, impairing b…

cs.IR2026

Differentiable Semantic ID for Generative Recommendation

Junchen Fu, Xuri Ge, Alexandros Karatzoglou +4

Generative recommendation provides a novel paradigm in which each item is represented by a discrete semantic ID (SID) learned from rich content. Most existing methods treat SIDs as…

q-bio.NC2025

Brain-Language Model Alignment: Insights into the Platonic Hypothesis and Intermediate-Layer Advantage

Ángela López-Cardona, Sebastián Idesis, Mireia Masias-Bruns +2

Do brains and language models converge toward the same internal representations of the world? Recent years have seen a rise in studies of neural activations and model alignment. In…

cs.IR2025

Beyond One-Size-Fits-All: A Study of Neural and Behavioural Variability Across Different Recommendation Categories

Georgios Koutroumpas, Sebastian Idesis, Mireia Masias Bruns +4

Traditionally, Recommender Systems (RS) have primarily measured performance based on the accuracy and relevance of their recommendations. However, this algorithmic-centric approach…

cs.IR2025

The 1st EReL@MIR Workshop on Efficient Representation Learning for Multimodal Information Retrieval

Junchen Fu, Xuri Ge, Xin Xin +5

Multimodal representation learning has garnered significant attention in the AI community, largely due to the success of large pre-trained multimodal foundation models like LLaMA,…

cs.CL2025★ 3 cited

Integrating Cognitive Processing Signals into Language Models: A Review of Advances, Applications and Future Directions

Angela Lopez-Cardona, Sebastian Idesis, Ioannis Arapakis

Recently, the integration of cognitive neuroscience in Natural Language Processing (NLP) has gained significant attention. This article provides a critical and timely overview of r…

cs.IR2025

CROSSAN: Towards Efficient and Effective Adaptation of Multiple Multimodal Foundation Models for Sequential Recommendation

Junchen Fu, Yongxin Ni, Joemon M. Jose +4

In this paper, we explore a less-studied yet practically important problem: how to efficiently and effectively adapt multiple (2) multimodal foundation models (MFMs) for the seq…

cs.CL2025★ 3 cited

OASST-ETC Dataset: Alignment Signals from Eye-tracking Analysis of LLM Responses

Angela Lopez-Cardona, Sebastian Idesis, Miguel Barreda-Ángeles +2

While Large Language Models (LLMs) have significantly advanced natural language processing, aligning them with human preferences remains an open challenge. Although current alignme…

cs.CL2025

LLMPopcorn: Exploring LLMs as Assistants for Popular Micro-video Generation

Junchen Fu, Xuri Ge, Kaiwen Zheng +5

In an era where micro-videos dominate platforms like TikTok and YouTube, AI-generated content is nearing cinematic quality. The next frontier is using large language models (LLMs)…

cs.IR2025

Large Language Model driven Policy Exploration for Recommender Systems

Jie Wang, Alexandros Karatzoglou, Ioannis Arapakis +1

Recent advancements in Recommender Systems (RS) have incorporated Reinforcement Learning (RL), framing the recommendation as a Markov Decision Process (MDP). However, offline RL po…

cs.IR2024★ 10 cited

Efficient and Effective Adaptation of Multimodal Foundation Models in Sequential Recommendation

Junchen Fu, Xuri Ge, Xin Xin +5

Multimodal foundation models (MFMs) have revolutionized sequential recommender systems through advanced representation learning. While Parameter-efficient Fine-tuning (PEFT) is com…

cs.CL2024★ 1 cited

Seeing Eye to AI: Human Alignment via Gaze-Based Response Rewards for Large Language Models

Angela Lopez-Cardona, Carlos Segura, Alexandros Karatzoglou +2

Advancements in Natural Language Processing (NLP), have led to the emergence of Large Language Models (LLMs) such as GPT, Llama, Claude, and Gemini, which excel across a range of t…

cs.LG2024★ 19 cited

Diffusion Models for Tabular Data Imputation and Synthetic Data Generation

Mario Villaizán-Vallelado, Matteo Salvatori, Carlos Segura +1

Data imputation and data generation have important applications for many domains, like healthcare and finance, where incomplete or missing data can hinder accurate analysis and dec…