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Xuefeng Liu

24 accepted papers

2026

Enhancing Visual Representation with Textual Semantics: Textual Semantics-Powered Prototypes for Heterogeneous Federated Learning

CVPR 2026

Federated Prototype Learning (FedCL) has emerged as an effective strategy for handling data heterogeneity in Federated Learning (FL). In FedCL, clients collaboratively construct a set of global feature centers (prototypes), and let local features align with these prototypes to mitigate the effects o

Cited by 0SourcecodeScholar
2026

FedPDG: Prediction Discrepancy–Guided Data Generation for Heterogeneous Federated Learning

ICML 2026poster

One emerging approach to mitigating data heterogeneity in Federated Learning (FL) is to employ diffusion models to generate synthetic data for clients, thereby aligning local data distributions with the global distribution. Prior work has primarily focused on balance-oriented augmentation, which ass…

Cited by 0SourceScholar
2026

Learning to Optimize Job Shop Scheduling Under Structural Uncertainty

AAAI 2026technical

The Job-Shop Scheduling Problem (JSSP), under various forms of manufacturing uncertainty, has recently attracted considerable research attention. Most existing studies focus on parameter uncertainty, such as variable processing times, and typically adopt the actor-critic framework. In this paper, we

Cited by 0SourcePDFScholar
2026

Regime-Adaptive Bayesian Optimization via Dirichlet Process Mixtures of Gaussian Processes

ICML 2026poster

Standard Bayesian Optimization (BO) assumes uniform smoothness across the search space—an assumption violated in multi-regime problems such as molecular conformation search through distinct energy basins or drug discovery across heterogeneous molecular scaffolds. A single GP either oversmooths sharp…

Cited by 0SourceScholar
2025

Can Federated Learning Safeguard Private Data in LLM Training? Vulnerabilities, Attacks, and Defense Evaluation

EMNLP 2025

Fine-tuning large language models (LLMs) with local data is a widely adopted approach for organizations seeking to adapt LLMs to their specific domains. Given the shared characteristics in data across different organizations, the idea of collaboratively fine-tuning an LLM using data from multiple so

Cited by 0SourcePDFScholar
2025

Causality Inspired Federated Learning for OOD Generalization

ICML 2025poster

The out-of-distribution (OOD) generalization problem in federated learning (FL) has recently attracted significant research interest. A common approach, derived from centralized learning, is to extract causal features which exhibit causal relationships with the label. However, in FL, the global fea…

Cited by 0SourcePDFScholar
2025

DiffDVC: Accurate Event Detection for Dense Video Captioning via Diffusion Models

AAAI 2025technical

Dense video captioning (DVC) aims to describe multiple events within a video, and its performance is greatly affected by the accuracy of video event detection. Video event detection involves predicting the proposal boundaries (start and end times) and the classification score of each event in a vide…

Cited by 0SourcePDFScholar
2025

Keep Your Friends Close, and Your Enemies Farther: Distance-aware Voxel-wise Contrastive Learning for Semi-supervised Multi-organ Segmentation

ICCV 2025poster

Based on pseudo-labels, voxel-wise contrastive learning (VCL) is a prominent approach designed to learn effective feature representations for semi-supervised medical image segmentation. However, in multi-organ segmentation (MoS), the complex anatomical structures of certain organs often lead to many…

Cited by 0SourcePDFScholar
2025

Learning from Imperfect Human Feedback: A Tale from Corruption-Robust Dueling

ICLR 2025poster

This paper studies Learning from Imperfect Human Feedback (LIHF), addressing the potential irrationality or imperfect perception when learning from comparative human feedback. Building on evidences that human's imperfection decays over time (i.e., humans learn to improve), we cast this problem as a…

Cited by 1SourcePDFScholar
2025

OpenVIS: Open-vocabulary Video Instance Segmentation

AAAI 2025technical

Open-vocabulary Video Instance Segmentation (OpenVIS) can simultaneously detect, segment, and track arbitrary object categories in a video, without being constrained to categories seen during training. In this work, we propose InstFormer, a carefully designed framework for the OpenVIS task that achi…

2025

Tackling Feature-Classifier Mismatch in Federated Learning via Prompt-Driven Feature Transformation

NeurIPS 2025poster

Federated Learning (FL) faces challenges due to data heterogeneity, which limits the global model’s performance across diverse client distributions. Personalized Federated Learning (PFL) addresses this by enabling each client to process an individual model adapted to its local distribution. Many exi…

Cited by 0SourceScholar
2024

BeyondVision: An EMG-driven Micro Hand Gesture Recognition Based on Dynamic Segmentation

IJCAI 2024poster

Hand gesture recognition (HGR) plays a pivotal role in natural and intuitive human-computer interactions. Recent HGR methods focus on recognizing gestures from vision-based images or videos. However, vision-based methods are limited in recognizing micro hand gestures (MHGs) (e.g., pinch within 1cm)…

2024

Blending Imitation and Reinforcement Learning for Robust Policy Improvement

ICLR 2024spotlight

While reinforcement learning (RL) has shown promising performance, its sample complexity continues to be a substantial hurdle, restricting its broader application across a variety of domains. Imitation learning (IL) utilizes oracles to improve sample efficiency, yet it is often constrained by the qu…

Cited by 12SourcePDFScholar
2024

Entropy-Reinforced Planning with Large Language Models for Drug Discovery

ICML 2024poster

The objective of drug discovery is to identify chemical compounds that possess specific pharmaceutical properties toward a binding target. Existing large language models (LLMS) can achieve high token matching scores in terms of likelihood for molecule generation. However, relying solely on LLM decod…

2024

Estimating before Debiasing: A Bayesian Approach to Detaching Prior Bias in Federated Semi-Supervised Learning

IJCAI 2024poster

Federated Semi-Supervised Learning (FSSL) leverages both labeled and unlabeled data on clients to collaboratively train a model. In FSSL, the heterogeneous data can introduce prediction bias into the model, causing the model's prediction to skew towards some certain classes. Existing FSSL method…

2024

Why Go Full? Elevating Federated Learning Through Partial Network Updates

NeurIPS 2024poster

Federated learning is a distributed machine learning paradigm designed to protect user data privacy, which has been successfully implemented across various scenarios. In traditional federated learning, the entire parameter set of local models is updated and averaged in each training round. Although…

2023

Active Policy Improvement from Multiple Black-box Oracles

ICML 2023poster

Reinforcement learning (RL) has made significant strides in various complex domains. However, identifying an effective policy via RL often necessitates extensive exploration. Imitation learning aims to mitigate this issue by using expert demonstrations to guide exploration. In real-world scenarios,…

2023

Bold but Cautious: Unlocking the Potential of Personalized Federated Learning through Cautiously Aggressive Collaboration

ICCV 2023poster

Personalized federated learning (PFL) reduces the impact of non-independent and identically distributed (non-IID) data among clients by allowing each client to train a personalized model when collaborating with others. A key question in PFL is to decide which parameters of a client should be localiz…

Cited by 32PDFcodeScholar
2021

ArtCoder: An End-to-End Method for Generating Scanning-Robust Stylized QR Codes

CVPR 2021poster

Quick Response (QR) code is one of the most worldwide used two-dimensional codes. Traditional QR codes appear as random collections of black-and-white modules that lack visual semantics and aesthetic elements, which inspires the recent works to beautify the appearances of QR codes. However, these wo…

Cited by 13PDFcodeScholar
2021

MangaGAN: Unpaired Photo-to-Manga Translation Based on The Methodology of Manga Drawing

AAAI 2021technical

Manga is a world popular comic form originated in Japan, which typically employs black-and-white stroke lines and geometric exaggeration to describe humans' appearances, poses, and actions. In this paper, we propose MangaGAN, the first method based on Generative Adversarial Network (GAN) for unpaire…

Cited by 39SourcePDFScholar
2021

Visformer: The Vision-Friendly Transformer

ICCV 2021poster

The past year has witnessed the rapid development of applying the Transformer module to vision problems. While some researchers have demonstrated that Transformer-based models enjoy a favorable ability of fitting data, there are still growing number of evidences showing that these models suffer over…

Cited by 274PDFcodeScholar
2020

Network Adjustment: Channel Search Guided by FLOPs Utilization Ratio

CVPR 2020poster

Automatic designing computationally efficient neural networks has received much attention in recent years. Existing approaches either utilize network pruning or leverage the network architecture search methods. This paper presents a new framework named network adjustment, which considers network acc…

Cited by 15PDFcodeScholar
2020

SelectScale: Mining More Patterns from Images via Selective and Soft Dropout

IJCAI 2020poster

Convolutional neural networks (CNNs) have achieved remarkable success in image recognition. Although the internal patterns of the input images are effectively learned by the CNNs, these patterns only constitute a small proportion of useful patterns contained in the input images. This can be attribut…

Cited by 0SourcePDFScholar