← Search

Xiao Hu

20 accepted papers

2026

CogStereo: Neural Stereo Matching with Implicit Spatial Cognition Embedding

ICRA 2026poster

Deep stereo matching has advanced significantly on benchmark datasets through fine-tuning but falls short of the zero-shot generalization seen in foundation models in other vision tasks. We introduce CogStereo, a novel framework that addresses challenging regions, such as occlusions or weak textures…

2026

Position: Beyond Prediction: Toward Verifiable Physiological Waveform Reasoning with Foundation Models and Agentic LLMs

ICML 2026poster

Physiological waveforms (e.g., ECG, PPG, EEG) encode clinically meaningful information in fine-grained morphology, precise timing, and cross-channel dynamics, yet most machine learning systems still treat them as generic time series and optimize end-to-end prediction. In this position paper, **we ar…

Cited by 0SourceScholar
2026

R1-Reward: Training Multimodal Reward Model Through Stable Reinforcement Learning

ICLR 2026poster

Multimodal Reward Models (MRMs) play a crucial role in enhancing the performance of Multimodal Large Language Models (MLLMs). While recent advancements have primarily focused on improving the model structure and training data of MRMs, there has been limited exploration into the effectiveness of long…

Cited by 0SourcecodeScholar
2026

SIGMA-PPG: Statistical-prior Informed Generative Masking Architecture for PPG Foundation Model

ICML 2026poster

Current foundation model for photoplethysmography (PPG) signals is challenged by the intrinsic redundancy and noise of the signal. Standard masked modeling often yields trivial solutions while contrastive methods lack morphological precision. To address these limitations, we propose a Statistical-pr…

Cited by 0SourceScholar
2025

CLARIFY: Contrastive Preference Reinforcement Learning for Untangling Ambiguous Queries

ICML 2025poster

Preference-based reinforcement learning (PbRL) bypasses explicit reward engineering by inferring reward functions from human preference comparisons, enabling better alignment with human intentions. However, humans often struggle to label a clear preference between similar segments, reducing label ef…

2025

Data Center Cooling System Optimization Using Offline Reinforcement Learning

ICLR 2025poster

The recent advances in information technology and artificial intelligence have fueled a rapid expansion of the data center (DC) industry worldwide, accompanied by an immense appetite for electricity to power the DCs. In a typical DC, around 30-40% of the energy is spent on the cooling system rather…

Cited by 0SourcePDFScholar
2025

GeLLM³O: Generalizing Large Language Models for Multi-property Molecule Optimization

ACL 2025long

Despite recent advancements, most computational methods for molecule optimization are constrained to single- or double-property optimization tasks and suffer from poor scalability and generalizability to novel optimization tasks. Meanwhile, Large Language Models (LLMs) demonstrate remarkable out-of-…

2025

Large Language Models for Controllable Multi-property Multi-objective Molecule Optimization

EMNLP 2025

In real-world drug design, molecule optimization requires selectively improving multiple molecular properties up to pharmaceutically relevant levels, while maintaining others that already meet such criteria. However, existing computational approaches and instruction-tuned LLMs fail to capture such n

2025

Motion Decoupled 3D Gaussian Splatting for Dynamic Object Representation

AAAI 2025technical

Dynamic object modeling is a critical challenge in 3D scene reconstruction. Previous methods typically maintain a canonical space to represent the object model, and a deformation field to express the object motion. However, this approach fails when the object undergoes large motions. The position va…

2025

Offline Guarded Safe Reinforcement Learning for Medical Treatment Optimization Strategies

NeurIPS 2025spotlight

When applying offline reinforcement learning (RL) in healthcare scenarios, the out-of-distribution (OOD) issues pose significant risks, as inappropriate generalization beyond clinical expertise can result in potentially harmful recommendations. While existing methods like conservative Q-learning (C…

Cited by 0SourceScholar
2024

DecisionNCE: Embodied Multimodal Representations via Implicit Preference Learning

ICML 2024poster

Multimodal pretraining is an effective strategy for the trinity of goals of representation learning in autonomous robots: $1)$ extracting both local and global task progressions; $2)$ enforcing temporal consistency of visual representation; $3)$ capturing trajectory-level language grounding. Most ex…

2024

Query-Policy Misalignment in Preference-Based Reinforcement Learning

ICLR 2024spotlight

Preference-based reinforcement learning (PbRL) provides a natural way to align RL agents’ behavior with human desired outcomes, but is often restrained by costly human feedback. To improve feedback efficiency, most existing PbRL methods focus on selecting queries to maximally improve the overall qua…

2023

Deep Joint Source-Channel Coding with Iterative Source Error Correction

AISTATS 2023poster

In this paper, we propose an iterative source error correction (ISEC) decoding scheme for deep-learning-based joint source-channel coding (Deep JSCC). Given a noisy codeword received through the channel, we use a Deep JSCC encoder and decoder pair to update the codeword iteratively to find a (modifi…

2023

Mind the Gap: Offline Policy Optimization for Imperfect Rewards

ICLR 2023poster

Reward function is essential in reinforcement learning (RL), serving as the guiding signal to incentivize agents to solve given tasks, however, is also notoriously difficult to design. In many cases, only imperfect rewards are available, which inflicts substantial performance loss for RL agents. In…

2023

On Differentially Private Sampling from Gaussian and Product Distributions

NeurIPS 2023poster

We study the problem, where given a dataset of $n$ i.i.d. samples from an unknown distribution $P$, we seek to generate a sample from a distribution that is close to $P$ in total variation distance, under the constraint of differential privacy. We study the settings where $P$ is a multi-dimensional…

Cited by 7SourcePDFScholar
2020

A Large-scale Annotated Mechanical Components Benchmark for Classification and Retrieval Tasks with Deep Neural Networks

ECCV 2020poster

We introduce a large-scale annotated mechanical components benchmark for classification and retrieval tasks named MechanicalComponents Benchmark (MCB): a large-scale dataset of 3D objects of mechanical components. The dataset enables data-driven feature learn-ing for mechanical components. Exploring…

2020

Gyroscope Aided Video Stabilization Using Nonlinear Regression on Special Orthogonal Group

ICASSP 2020accepted

This paper presents a novel approach for gyroscope aided video stabilization. With the raw 3D rotational motion captured by a gyroscope, it is then smoothed through nonlinear regression directly on the Special Orthogonal Group. Instead of solving a variational problem, the regression problem is disc…

Cited by 0SourceScholar