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Sheng Xu

48 accepted papers

2026

FAIR-Calib: Frontier-Aware Instability-Reweighted Calibration for Post-Training Quantization of Diffusion Large Language Models

ICML 2026poster

Diffusion Large Language Models (dLLMs) refine tokens iteratively but commit them irreversibly, leading to a "stability lag" where early decisions remain fragile even after being written. We reveal that Post-Training Quantization (PTQ) error easily flips these borderline decisions at the write front…

Cited by 0SourceScholar
2026

Focus-Then-Contact: Speeding Up Robotic Contact-Rich Task Learning with Affordance-Guided Real-World Residual Reinforcement Learning

ICML 2026poster

Real-World Reinforcement Learning (RL) has shown significant potential in robotic manipulation tasks. However, many methods still require substantial human-in-the-loop involvement to complete contact-rich tasks, especially when there are disruptions such as visual backgrounds or positional changes. …

Cited by 0SourceScholar
2026

From Reaction to Anticipation: Proactive Failure Recovery through Agentic Task Graph for Robotic Manipulation

RSS 2026poster

Recent advances in robotic manipulation remain hindered by the inevitability of task failures, particularly in dynamic and unstructured environments. To handle such failure, existing frameworks typically follow a stepwise detect–reason–recover pipeline, which often incurs high latency and limited ro…

Cited by 0SourceScholar
2026

PartDiffuser: Part-wise 3D Mesh Generation via Discrete Diffusion

CVPR 2026

Existing autoregressive (AR) methods for generating artist-designed meshes struggle to balance global structural consistency with high-fidelity local details, and are susceptible to error accumulation. To address this, we propose PartDiffuser, a novel semi-autoregressive diffusion framework for poin

Cited by 0SourceScholar
2026

PortraitDirector: A Hierarchical Disentanglement Framework for Controllable and Real-time Facial Reenactment

CVPR 2026

Existing facial reenactment methods struggle with a trade-off between expressiveness and fine-grained controllability. Holistic facial reenactment models often sacrifice granular control for expressiveness, while methods designed for control may struggle with fidelity and robust disentanglement. Ins

Cited by 0SourceScholar
2026

RoboFlow4D: A Lightweight Flow World Model Toward Real-Time Flow-Guided Robotic Manipulation

ICML 2026poster

Planning and acting in 3D environments is a fundamental capability for robotic manipulation in the real world. Although prior work has explored predictive flow planners to guide 3D manipulation, existing approaches often rely on modular pipelines stacking multiple submodels, resulting in high comput…

Cited by 3SourceScholar
2026

Sim2Real VLA: Zero-Shot Generalization of Synthesized Skills to Realistic Manipulation

ICLR 2026poster

Vision-Language-Action (VLA) models represent a critical milestone toward embodied intelligence in robotic manipulation. To support their training, recent research has developed high-performance simulation engines for data synthesis. However, their effectiveness is still significantly limited by the…

Cited by 0SourceScholar
2025

A Distributional Approach to Uncertainty-Aware Preference Alignment Using Offline Demonstrations

ICLR 2025poster

Designing reward functions in Reinforcement Learning (RL) often demands significant task-specific expertise. Offline Preference-based Reinforcement Learning (PbRL) provides an effective alternative to address the complexity of reward design by learning policies from offline datasets that contain hum…

2025

Bidirectional Representations Augmented Autoregressive Biological Sequence Generation: Application in De Novo Peptide Sequencing

NeurIPS 2025poster

Autoregressive (AR) models, common in sequence generation, are limited in many biological tasks like de novo peptide sequencing and protein modeling by their unidirectional nature, failing to capture crucial global bidirectional token dependencies. Non-Autoregressive (NAR) models offer holistic, bid…

Cited by 0SourcecodeScholar
2025

Claim veracity assessment for explainable fake news detection

COLING 2025main

With the rapid growth of social network services, misinformation has spread uncontrollably. Most recent approaches to fake news detection use neural network models to predict whether the input text is fake or real. Some of them even provide explanations, in addition to veracity, generated by Large L…

2025

Curriculum Learning for Biological Sequence Prediction: The Case of De Novo Peptide Sequencing

ICML 2025poster

Peptide sequencing—the process of identifying amino acid sequences from mass spectrometry data—is a fundamental task in proteomics. Non-Autoregressive Transformers (NATs) have proven highly effective for this task, outperforming traditional methods. Unlike autoregressive models, which generate token…

2025

MaskGaussian: Adaptive 3D Gaussian Representation from Probabilistic Masks

CVPR 2025poster

While 3D Gaussian Splatting (3DGS) has demonstrated remarkable performance in novel view synthesis and real-time rendering, the high memory consumption due to the use of millions of Gaussians limits its practicality. To mitigate this issue, improvements have been made by pruning unnecessary Gaussian…

2025

OmniTalker: One-shot Real-time Text-Driven Talking Audio-Video Generation With Multimodal Style Mimicking

NeurIPS 2025poster

Although significant progress has been made in audio-driven talking head generation, text-driven methods remain underexplored. In this work, we present OmniTalker, a unified framework that jointly generates synchronized talking audio-video content from input text while emulating the target identity'…

Cited by 0SourceScholar
2025

On the Performance Analysis of Momentum Method: A Frequency Domain Perspective

ICLR 2025poster

Momentum-based optimizers are widely adopted for training neural networks. However, the optimal selection of momentum coefficients remains elusive. This uncertainty impedes a clear understanding of the role of momentum in stochastic gradient methods. In this paper, we present a frequency domain anal…

Cited by 0SourcePDFScholar
2025

Toward Exploratory Inverse Constraint Inference with Generative Diffusion Verifiers

ICLR 2025poster

An important prerequisite for safe control is aligning the policy with the underlying constraints in the environment. In many real-world applications, due to the difficulty of manually specifying these constraints, existing works have proposed recovering constraints from expert demonstrations by sol…

2025

Uncertainty-aware Preference Alignment for Diffusion Policies

NeurIPS 2025poster

Recent advancements in diffusion policies have demonstrated promising performance in decision-making tasks. To align these policies with human preferences, a common approach is incorporating Preference-based Reinforcement Learning (PbRL) into policy tuning. However, since preference data is practica…

Cited by 0SourceScholar
2025

Universal Biological Sequence Reranking for Improved De Novo Peptide Sequencing

ICML 2025poster

De novo peptide sequencing is a critical task in proteomics. However, the performance of current deep learning-based methods is limited by the inherent complexity of mass spectrometry data and the heterogeneous distribution of noise signals, leading to data-specific biases. We present RankNovo, the…

2024

BEACON: Benchmark for Comprehensive RNA Tasks and Language Models

NeurIPS 2024poster

RNA plays a pivotal role in translating genetic instructions into functional outcomes, underscoring its importance in biological processes and disease mechanisms. Despite the emergence of numerous deep learning approaches for RNA, particularly universal RNA language models, there remains a significa…

2024

Bi-ViT: Pushing the Limit of Vision Transformer Quantization

AAAI 2024technical

Vision transformers (ViTs) quantization offers a promising prospect to facilitate deploying large pre-trained networks on resource-limited devices. Fully-binarized ViTs (Bi-ViT) that pushes the quantization of ViTs to its limit remain largely unexplored and a very challenging task yet, due to their…

2024

ContraNovo: A Contrastive Learning Approach to Enhance De Novo Peptide Sequencing

AAAI 2024technical

De novo peptide sequencing from mass spectrometry (MS) data is a critical task in proteomics research. Traditional de novo algorithms have encountered a bottleneck in accuracy due to the inherent complexity of proteomics data. While deep learning-based methods have shown progress, they reduce the pr…

2024

CrossBind: Collaborative Cross-Modal Identification of Protein Nucleic-Acid-Binding Residues

AAAI 2024technical

Accurate identification of protein nucleic acid binding residues poses a significant challenge with important implications for various biological processes and drug design. Many typical computational methods for protein analysis rely on a single model that could ignore either the semantic context of…

2024

Enhancing Human-AI Collaboration Through Logic-Guided Reasoning

ICLR 2024poster

We present a systematic framework designed to enhance human-robot perception and collaboration through the integration of logical rules and Theory of Mind (ToM). Logical rules provide interpretable predictions and generalize well across diverse tasks, making them valuable for learning and decision-m…

Cited by 5SourcePDFScholar
2024

Learning 1-Bit Tiny Object Detector with Discriminative Feature Refinement

ICML 2024poster

1-bit detectors show impressive performance comparable to their real-valued counterparts when detecting commonly sized objects while exhibiting significant performance degradation on tiny objects. The challenge stems from the fact that high-level features extracted by 1-bit convolutions seem less co…

Cited by 1SourcePDFScholar
2024

Uncertainty-aware Constraint Inference in Inverse Constrained Reinforcement Learning

ICLR 2024poster

Aiming for safe control, Inverse Constrained Reinforcement Learning (ICRL) considers inferring the constraints respected by expert agents from their demonstrations and learning imitation policies that adhere to these constraints. While previous ICRL works often neglected underlying uncertainties dur…

2023

Angle-Of-Arrival Target Tracking Using A Mobile Uav In External Signal-Denied Environment

ICASSP 2023accepted

This paper focuses on the angle-of-arrival (AOA) target tracking problem using a mobile unmanned aerial vehicle (UAV) equipped with an angle-of-arrival (AOA) sensor to observe targets in an external-denied (no global positioning system, inertial navigation system aid) environment. The mathematical f…

Cited by 0SourceScholar
2023

CorefPrompt: Prompt-based Event Coreference Resolution by Measuring Event Type and Argument Compatibilities

EMNLP 2023long main

Event coreference resolution (ECR) aims to group event mentions referring to the same real-world event into clusters. Most previous studies adopt the "encoding first, then scoring" framework, making the coreference judgment rely on event encoding. Furthermore, current methods struggle to leverage hu…

Cited by 0SourcecodeScholar
2023

Implicit Diffusion Models for Continuous Super-Resolution

CVPR 2023poster

Image super-resolution (SR) has attracted increasing attention due to its wide applications. However, current SR methods generally suffer from over-smoothing and artifacts, and most work only with fixed magnifications. This paper introduces an Implicit Diffusion Model (IDM) for high-fidelity continu…

2023

Q-DETR: An Efficient Low-Bit Quantized Detection Transformer

CVPR 2023highlight

The recent detection transformer (DETR) has advanced object detection, but its application on resource-constrained devices requires massive computation and memory resources. Quantization stands out as a solution by representing the network in low-bit parameters and operations. However, there is a si…

2023

Q-DM: An Efficient Low-bit Quantized Diffusion Model

NeurIPS 2023poster

Denoising diffusion generative models are capable of generating high-quality data, but suffers from the computation-costly generation process, due to a iterative noise estimation using full-precision networks. As an intuitive solution, quantization can significantly reduce the computational and mem…

Cited by 39SourcePDFScholar
2023

Representation Disparity-aware Distillation for 3D Object Detection

ICCV 2023poster

In this paper, we focus on developing knowledge distillation (KD) for compact 3D detectors. We observe that off-the-shelf KD methods manifest their efficacy only when the teacher model and student counterpart share similar intermediate feature representations. This might explain why they are less ef…

Cited by 10PDFcodeScholar
2023

Resilient Binary Neural Network

AAAI 2023technical

Binary neural networks (BNNs) have received ever-increasing popularity for their great capability of reducing storage burden as well as quickening inference time. However, there is a severe performance drop compared with {real-valued} networks, due to its intrinsic frequent weight oscillation during…

2023

Target-Referenced Reactive Grasping for Dynamic Objects

CVPR 2023poster

Reactive grasping, which enables the robot to successfully grasp dynamic moving objects, is of great interest in robotics. Current methods mainly focus on the temporal smoothness of the predicted grasp poses but few consider their semantic consistency. Consequently, the predicted grasps are not guar…

Cited by 14SourcePDFScholar
2022

IDa-Det: An Information Discrepancy-Aware Distillation for 1-Bit Detectors

ECCV 2022poster

"Knowledge distillation (KD) has been proven to be useful for training compact object detection models. However, we observe that KD is often effective when the teacher model and student counterpart share similar proposal information. This explains why existing KD methods are less effective for 1-bit…

2022

Improving Event Coreference Resolution Using Document-level and Topic-level Information

EMNLP 2022main

Event coreference resolution (ECR) aims to cluster event mentions that refer to the same real-world events. Deep learning methods have achieved SOTA results on the ECR task. However, due to the encoding length limitation, previous methods either adopt classical pairwise models based on sentence-leve…

2022

Q-ViT: Accurate and Fully Quantized Low-bit Vision Transformer

NeurIPS 2022accept

The large pre-trained vision transformers (ViTs) have demonstrated remarkable performance on various visual tasks, but suffer from expensive computational and memory cost problems when deployed on resource-constrained devices. Among the powerful compression approaches, quantization extremely reduces…

2022

Recurrent Bilinear Optimization for Binary Neural Networks

ECCV 2022poster

"Binary Neural Networks (BNNs) show great promise for real-world embedded devices. As one of the critical steps to achieve a powerful BNN, the scale factor calculation plays an essential role in reducing the performance gap to their real-valued counterparts. However, existing BNNs neglect the intrin…

2022

TransCG: A Large-Scale Real-World Dataset for Transparent Object Depth Completion and a Grasping Baseline

RA-L 2022

Transparent objects are common in our daily life and frequently handled in the automated production line. Robust vision-based robotic grasping and manipulation for these objects would be beneficial for automation. However, the majority of current grasping algorithms would fail in this case since the

Cited by 120SourcecodeScholar
2021

RGB Matters: Learning 7-DoF Grasp Poses on Monocular RGBD Images

ICRA 2021poster

General object grasping is an important yet unsolved problem in the field of robotics. Most of the current methods either generate grasp poses with few DoF that fail to cover most of the success grasps, or only take the unstable depth image or point cloud as input which may lead to poor results in s…

Cited by 132SourcecodeScholar
2020

A Neural Local Coherence Analysis Model for Clarity Text Scoring

COLING 2020main

Local coherence relation between two phrases/sentences such as cause-effect and contrast gives a strong influence of whether a text is well-structured or not. This paper follows the assumption and presents a method for scoring text clarity by utilizing local coherence between adjacent sentences. We…

2016

3D pseudolinear Kalman filter with own-ship path optimization for AOA target tracking

ICASSP 2016accepted

This paper investigates the problem of how to optimize the path of a single moving own-ship for angle-of-arrival (AOA) target tracking in three-dimensional (3D) space. First, a novel 3D pseudolinear Kalman filter (PLKF) is proposed to reduce computational complexity and to improve stability of an ex…

Cited by 0SourceScholar
2015

Robust Estimation of Transition Matrices in High Dimensional Heavy-tailed Vector Autoregressive Processes

ICML 2015poster

Gaussian vector autoregressive (VAR) processes have been extensively studied in the literature. However, Gaussian assumptions are stringent for heavy-tailed time series that frequently arises in finance and economics. In this paper, we develop a unified framework for modeling and estimating heavy-ta…

Cited by 50SourcePDFScholar