Publications

Publications in the Last Five Years

2026

Preprints and Manuscripts

QUAD: Q-Gradient Uncertainty-Aware Guidance for Diffusion Policies in Offline Reinforcement Learning

Hongtu Zhou, Qian Chen, Junqiao Zhao*, Haoqi Zhao, Changhao Yin, Qingjun Wang, Hang Yu, Ziqiao Wang, Jun Wang, Chen Ye and Guang Chen

arXiv, 2026.

GeoUniPR: A Geometry-Consistent Unified Framework for Cross-Modal Place Recognition

Wonbong Kim, Jiatong Xiao, Rui Li, Xufei Wang, Qiwen Gu, Junqiao Zhao*, Chen Ye and Guang Chen

arXiv, 2026.

Learning Geometrically-Grounded Amodal 3D Representations for View-Generalizable Robotic Manipulation

Di Zhang, Weicheng Duan, Dasen Gu, Hongye Lu, Hai Zhang, Hang Yu, Guang Chen, Chuan Wen and Junqiao Zhao*

arXiv, 2026.

R2M-Bench: Evaluating Revisit Memory via Relative Consistency in Interactive Video World Models

Qiwen Gu, Bingjie Gao, Rui Chen, Geng Li, Jifan Li, Qishuai Wen, Li Niu, Jing Tang, Xiangxiang Chu and Junqiao Zhao*

arXiv, 2026.

SC-JSRL: Training-Safe Policy Improvement via Certified Handoff

Jialin Liu, Qian Chen and Junqiao Zhao*

Unpublished manuscript, 2026.

ACSAC: Adaptive Chunk Size Actor-Critic with Causal Transformer Q-Network

Qian Chen, Junqiao Zhao*, Hongtu Zhou, Hang Yu, Yanping Zhao, Chen Ye and Guang Chen

arXiv, 2026.

GWM-VLA: Geometry-Aware Latent World Modeling for Vision-Language-Action Learning

Yanping Zhao, Hang Yu, Yiwei Wang, Chen Ye, Siyu Tian, Di Zhang, Qingjun Wang, Qian Chen, Junqiao Zhao* and Guang Chen

arXiv, 2026.

UG-Diff: Improving Neural Rendering in Distractor-Corrupted Scenes via Uncertainty-Guided Diffusion

Wenjie Mu, Zhan Li, Jingxiao Han, Tong Wu, Ziniu Liu, Chuanzhou Su, Xuanyi Shen, Fan Lu, Junqiao Zhao*, Tiantian Feng, Chen Ye and Guang Chen

Unpublished manuscript, 2026.

PersistSplat: Streaming Feed-Forward Reconstruction with Persistent Gaussian Memory

Ziniu Liu, Wenjie Mu, Jingxiao Han, Zhan Li, Tong Wu, Chuanzhou Su, Xuanyi Shen, Fan Lu, Junqiao Zhao*, Tiantian Feng, Chen Ye and Guang Chen

Unpublished manuscript, 2026.

HIERAMEM: Evidence-Anchored Hierarchical Memory for Self-Evolving LLM Agents

Xiying Chen, Junqiao Zhao*, Zekai Zhu, Yanping Zhao, Chen Ye, Lianghua He and Guang Chen

Unpublished manuscript, 2026.

Conference Papers

Beyond Penalization: Diffusion-based Out-of-Distribution Detection and Selective Regularization in Offline Reinforcement Learning

Qingjun Wang, Hongtu Zhou, Hang Yu, Junqiao Zhao*, Yanping Zhao, Chen Ye, Ziqiao Wang and Guang Chen

International Conference on Learning Representations (ICLR 2026), Rio de Janeiro, Brazil, 2026.

TL;DR: Uses diffusion models to detect out-of-distribution actions and selectively regularize them while preserving beneficial actions.

Potentially Optimal Joint Actions Recognition for Cooperative Multi-Agent Reinforcement Learning

Chang Huang, Shatong Zhu, Junqiao Zhao*, Hongtu Zhou, Hai Zhang, Di Zhang, Chen Ye, Ziqiao Wang and Guang Chen

International Conference on Learning Representations (ICLR 2026), Rio de Janeiro, Brazil, 2026.

TL;DR: Identifies potentially optimal joint actions and adaptively adjusts training weights to improve convergence and policy recovery in cooperative multi-agent reinforcement learning.

Signal Structure-Aware Gaussian Splatting for Large-Scale Scene Reconstruction

Weiyi Xue, Fan Lu, Chi Zhang, Tianhang Wang, Sanqing Qu, Zehan Zheng, Boyuan Zheng, Junqiao Zhao and Guang Chen

International Conference on Learning Representations (ICLR 2026), Rio de Janeiro, Brazil, 2026.

TL;DR: Introduces a signal-structure-aware Gaussian Splatting framework that improves geometric consistency and reconstruction efficiency for large-scale scenes.

PF-SGS: Pose-Free Streaming 3D Gaussian Splatting for Large-Scale Scene Reconstruction

Wenjie Mu, Ziniu Liu, Tong Wu, Zhan Li, Chuanzhou Su, Xuanyi Shen, Fan Lu, Junqiao Zhao, Tiantian Feng, Chen Ye and Guang Chen

The Fortieth Annual Conference on Neural Information Processing Systems (NeurIPS 2026), 2026.

TL;DR: Proposes a feedforward 3D Gaussian Splatting reconstruction method based on streaming data, introducing global state and gating mechanisms to improve geometric consistency and reconstruction efficiency in long-sequence scenes.

A Unified Framework for Image-to-3D Part Generation via Variable Granularity

Qiwen Gu, Xin Zhou, Xiwu Chen, Zhongyang Zhu, Zhuo Zhang and Junqiao Zhao*

The Fortieth Annual Conference on Neural Information Processing Systems (NeurIPS 2026), 2026.

TL;DR: Proposes a unified approach for generating 3D parts from point-to-mask geometric cues of varying granularity, enhancing cross-modal generation performance while providing flexibility through deep cross-modal fusion during training.

MU-GeNeRF: Multi-view Uncertainty-guided Generalizable Neural Radiance Fields for Distractor-aware Scene

Wenjie Mu, Zhan Li, Chuanzhou Su, Xuanyi Shen, Ziniu Liu, Fan Lu, Yujian Mo, Junqiao Zhao*, Tiantian Feng, Chen Ye and Guang Chen

The IEEE/CVF Conference on Computer Vision and Pattern Recognition 2026, Denver, Colorado, 2026.

TL;DR: Proposes an uncertainty capture mechanism in generalizable NeRF for dynamic distractor scenes, enabling robust feedforward 3D reconstruction in such scenarios.

Journal Articles

Ranking-aware Continual Learning for LiDAR Place Recognition

Xufei Wang, Gengxuan Tian, Junqiao Zhao*, Siyue Tao, Qiwen Gu, Qiankun You and Tiantian Feng

ISPRS Journal of Photogrammetry and Remote Sensing, vol. 236, pp. 197–211, 2026.

TL;DR: Introduces ranking-aware knowledge distillation and knowledge fusion to preserve LiDAR place-recognition performance as the model learns new environments.

Learning From Mistakes: Loss-Aware Memory Enhanced Continual Learning for LiDAR Place Recognition

Xufei Wang, Junqiao Zhao*, Siyue Tao, Qiwen Gu, Wonbong Kim and Tiantian Feng

IEEE Robotics and Automation Letters, vol. 11, no. 8, pp. 9391–9398, 2026.

TL;DR: Introduces loss-aware memory replay for LiDAR place recognition, selectively revisiting samples prone to forgetting to preserve continual-learning performance.

2025

Preprints and Manuscripts

ASTRO: Adaptive Stitching via Dynamics-Guided Trajectory Rollouts

Hang Yu, Di Zhang, Qiwei Du, Yanping Zhao, Hai Zhang, Guang Chen, Eduardo E. Veas and Junqiao Zhao*

arXiv, 2025.

Deep Bundle-Adjusting Local-to-Global Registration for Unposed Generalizable Neural Radiance Fields

Wenjie Mu, Xuanyi Shen, Chuanzhou Su, Zhan Li, Junqiao Zhao*, Tiantian Feng, Chen Ye and Changjun Jiang

arXiv, 2025.

Multi-LVI-SAM: A Robust LiDAR-Visual-Inertial Odometry for Multiple Fisheye Cameras

Xinyu Zhang, Kai Huang, Junqiao Zhao*, Zihan Yuan and Tiantian Feng

arXiv, 2025.

Conference Papers

Scrutinize What We Ignore: Reining Task Representation Shift In Context-Based Offline Meta Reinforcement Learning

Hai Zhang, Boyuan Zheng, Anqi Guo, Tianying Ji, Pheng-Ann Heng, Junqiao Zhao* and Lanqing Li

International Conference on Learning Representations (ICLR 2025), 2025.

TL;DR: Identifies task-representation shift caused by context-encoder updates and constrains those updates to stabilize context-based offline meta-RL.

CERTAIN: Context Uncertainty-aware One-Shot Adaptation for Context-based Offline Meta Reinforcement Learning

Hongtu Zhou, Ruiling Yang, Yakun Zhu, Haoqi Zhao, Hai Zhang, Di Zhang, Junqiao Zhao*, Chen Ye and Changjun Jiang

International Conference on Machine Learning (ICML 2025), 2025.

TL;DR: Models uncertainty in context representations and uses it to selectively gather task context for improved one-shot adaptation in offline meta-RL.

Convex Hull-based Algebraic Constraint for Visual Quadric SLAM

Xiaolong Yu, Junqiao Zhao*, Shuangfu Song, Zhongyang Zhu, Zihan Yuan, Chen Ye, Tiantian Feng and Qiankun Yu

2025 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2025.

TL;DR: Uses convex-hull-based algebraic constraints in visual quadric SLAM to strengthen object-geometry cues for pose and scale estimation.

MutualVPR: A Mutual Learning Framework for Resolving Supervision Inconsistencies via Adaptive Clustering

Qiwen Gu, Xufei Wang, Junqiao Zhao*, Siyue Tao, Tiantian Feng, Ziqiao Wang and Guang Chen

Advances in Neural Information Processing Systems (NeurIPS 2025), 2025.

TL;DR: Introduces a mutual-learning place-recognition framework that jointly refines image descriptors and adaptive clusters to reduce supervision inconsistency from viewpoint changes and occlusion.

CHPO: Constrained Hybrid-action Policy Optimization for Reinforcement Learning

Ao Zhou, Jiayi Guan, Li Shen, Fan Lu, Sanqing Qu, Junqiao Zhao, Ziqiao Wang, Ya Wu and Guang Chen

Advances in Neural Information Processing Systems (NeurIPS 2025), San Diego, USA, 2025.

TL;DR: Introduces constrained policy optimization for hybrid action spaces, with theoretical analysis of safe policy improvement.

Journal Articles

Batch Informed Vines (BIV*): Heuristically Guided Exploration of Narrow Passages by Batch Vine Expansion

Ziheng Jiang, Chang Huang, Hongtu Zhou, Linlin Zhou*, Chen Ye and Junqiao Zhao*

IEEE Robotics and Automation Letters, vol. 10, no. 2, pp. 1960–1967, 2025.

TL;DR: Introduces batch-informed Vine* search, using heuristic-guided batch expansion to improve exploration through narrow passages.

UN3-Mapping: Uncertainty-Aware Neural Non-Projective Signed Distance Fields for 3D Mapping

Shuangfu Song, Junqiao Zhao*, Eduardo Veas, Jiaye Lin, Qiuyi Cao, Chen Ye and Tiantian Feng

IEEE Robotics and Automation Letters, pp. 1–8, 2025.

TL;DR: Develops an uncertainty-aware neural non-projective signed distance field mapping method that improves stability and accuracy in complex 3D reconstruction.

2024

Conference Papers

Safe Reinforcement Learning with Dead-Ends Avoidance and Recovery

Xiao Zhang, Hai Zhang, Hongtu Zhou, Chang Huang, Di Zhang, Chen Ye* and Junqiao Zhao*

2024 IEEE International Conference on Robotics and Automation (ICRA), 2024.

TL;DR: Separates task and recovery policies and uses safety-value assessment with online correction to reduce dead-end risks in reinforcement learning.

LOG-LIO: A LiDAR-Inertial Odometry with Efficient Local Geometric Information Estimation

Kai Huang, Junqiao Zhao*, Zhongyang Zhu, Chen Ye and Tiantian Feng

2024 IEEE International Conference on Robotics and Automation (ICRA), 2024.

TL;DR: Introduces efficient local geometric-information estimation for tightly coupled LiDAR-inertial odometry.

N$^3$-Mapping: Normal Guided Neural Non-Projective Signed Distance Fields for Large-scale 3D Mapping

Shuangfu Song, Junqiao Zhao*, Kai Huang, Jiaye Lin, Chen Ye and Tiantian Feng

2024 IEEE International Conference on Robotics and Automation (ICRA), Yokohama, Japan, 2024.

TL;DR: Uses surface-normal constraints in neural non-projective signed distance fields, with voxel-based sliding windows and hierarchical sampling for efficient large-scale mapping.

Focus On What Matters: Separated Models For Visual-Based RL Generalization

Di Zhang, Bowen Lv, Hai Zhang, Feifan Yang, Hongtu Zhou, Chang Huang, Hang Yu, Chen Ye, Junqiao Zhao* and Changjun Jiang

Advances in Neural Information Processing Systems (NeurIPS 2024), 2024.

TL;DR: Separates task-relevant and task-irrelevant visual factors in reinforcement learning and uses consistency constraints to improve policy generalization.

Towards an Information Theoretic Framework of Context-Based Offline Meta-Reinforcement Learning

Lanqing Li, Hai Zhang, Xinyu Zhang, Shatong Zhu, Junqiao Zhao* and Pheng-Ann Heng

Advances in Neural Information Processing Systems (NeurIPS 2024), Spotlight, 2024.

TL;DR: Develops an information-theoretic account of task information in context-based offline meta-RL and uses it to analyze context representation and policy learning.

Journal Articles

Safe Reinforcement Learning with Dead-Ends Avoidance and Recovery

Xiao Zhang, Hai Zhang, Hongtu Zhou, Chang Huang, Di Zhang, Chen Ye* and Junqiao Zhao*

IEEE Robotics and Automation Letters, vol. 9, no. 1, pp. 491–498, 2024.

TL;DR: Separates task and safety-recovery policies and uses safety assessment with online correction to avoid unrecoverable unsafe states in reinforcement learning.

LOG-LIO: A LiDAR-Inertial Odometry with Efficient Local Geometric Information Estimation

Kai Huang, Junqiao Zhao*, Zhongyang Zhu, Chen Ye and Tiantian Feng

IEEE Robotics and Automation Letters, vol. 9, no. 1, pp. 459-466, 2024.

TL;DR: Introduces efficient local geometric-information estimation for state estimation in LiDAR-inertial odometry.

DL-SLOT: Tightly-Coupled Dynamic LiDAR SLAM and 3D Object Tracking Based on Collaborative Graph Optimization

Xuebo Tian, Zhongyang Zhu, Junqiao Zhao*, Gengxuan Tian and Chen Ye

IEEE Transactions on Intelligent Vehicles, vol. 9, no. 1, pp. 1017–1027, 2024.

TL;DR: Jointly estimates ego pose and 3D object tracks through collaborative graph optimization, coupling localization and tracking in dynamic scenes.

Learning Sequence Descriptor Based on Spatio-Temporal Attention for Visual Place Recognition

Junqiao Zhao, Fenglin Zhang, Yingfeng Cai, Gengxuan Tian, Wenjie Mu, Chen Ye and Tiantian Feng

IEEE Robotics and Automation Letters, vol. 9, no. 3, pp. 2351–2358, 2024.

TL;DR: Aggregates image-sequence information with spatiotemporal attention to learn sequence-level descriptors for visual place recognition.

N$^3$-Mapping: Normal Guided Neural Non-Projective Signed Distance Fields for Large-scale 3D Mapping

Shuangfu Song, Junqiao Zhao*, Kai Huang, Jiaye Lin, Chen Ye and Tiantian Feng

IEEE Robotics and Automation Letters, vol. 9, no. 6, pp. 5935–5942, 2024.

TL;DR: Uses surface-normal constraints in neural non-projective signed distance fields, with voxel-based sliding windows and hierarchical sampling for efficient large-scale mapping.

LIMOT: A Tightly-Coupled System for LiDAR-Inertial Odometry and Multi-Object Tracking

Zhongyang Zhu, Junqiao Zhao*, Kai Huang, Xuebo Tian, Jiaye Lin and Chen Ye

IEEE Robotics and Automation Letters, vol. 9, no. 7, pp. 6600–6607, 2024.

TL;DR: Tightly couples LiDAR-inertial odometry and multi-object tracking, jointly estimating ego-vehicle and surrounding-object poses in a factor graph.

LOG-LIO2: A LiDAR-Inertial Odometry with Efficient Uncertainty Analysis

Kai Huang, Junqiao Zhao*, Jiaye Lin, Zhongyang Zhu, Shuangfu Song, Chen Ye and Tiantian Feng

IEEE Robotics and Automation Letters, vol. 9, no. 10, pp. 8226–8233, 2024.

TL;DR: Models LiDAR point uncertainty from range, incidence angle, and surface properties, and reduces propagation cost with an incremental local approximation.

VNI-Net: Vector Neurons-based Rotation-Invariant Descriptor for LiDAR Place Recognition

Gengxuan Tian, Junqiao Zhao*, Yingfeng Cai, Fenglin Zhang, Xufei Wang, Wenjie Mu, Chen Ye and Sisi Zlatanova

ISPRS Journal of Photogrammetry and Remote Sensing, vol. 218, pp. 506–517, 2024.

TL;DR: Uses vector neurons to construct rotation-invariant LiDAR place descriptors for robust recognition across orientations.

2023

Conference Papers

Multi-agent Decision-making at Unsignalized Intersections with Reinforcement Learning from Demonstrations

Chang Huang, Junqiao Zhao*, Hongtu Zhou, Hai Zhang, Xiao Zhang and Chen Ye

2023 IEEE Intelligent Vehicles Symposium (IV), Anchorage, Alaska, IEEE IV2023, 2023.

TL;DR: Combines learning from demonstrations with reinforcement learning for cooperative multi-agent decision-making at unsignalized intersections.

How to Fine-tune the Model: Unified Model Shift and Model Bias Policy Optimization

Hai Zhang, Hang Yu, Junqiao Zhao*, Di Zhang, Chang Huang, Hongtu Zhou, Xiao Zhang and Chen Ye

Advances in Neural Information Processing Systems (NeurIPS 2023), 2023.

TL;DR: Unifies model shift and model bias in offline reinforcement learning and adaptively fine-tunes models to improve policy performance.

2022

Conference Papers

Scale Estimation with Dual Quadrics for Monocular Object SLAM

Shuangfu Song, Junqiao Zhao*, Tiantian Feng, Chen Ye and Lu Xiong

2022 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Kyoto, Japan, IEEE IROS2022, 2022.

TL;DR: Estimates absolute scale in monocular object SLAM using dual-quadric object models and physical-dimension priors.

UPC-Faster-RCNN: A Dynamic Self-Labeling Algorithm for Open-Set Object Detection Based on Unknown Proposal Clustering

Yujun Liao, Yan Wu, Yujian Mo, Feilin Liu, Yufei He and Junqiao Zhao

2022 IEEE International Conference on Multisensor Fusion and Integration (MFI), pp. 1–6, Bedford, UK, IEEE, 2022.

TL;DR: No public contribution summary is available.

Patch-NetVLAD+: Learned patch descriptor and weighted matching strategy for place recognition

Yingfeng Cai, Junqiao Zhao*, Jiafeng Cui, Fenglin Zhang, Tiantian Feng and Chen Ye

2022 IEEE International Conference on Multisensor Fusion and Integration (MFI), Cranfield, UK, IEEE MFI2022, 2022.

TL;DR: Improves visual place recognition by learning local patch descriptors and weighting their matches.

Journal Articles

LIO-Vehicle: A Tightly-Coupled Vehicle Dynamics Extension of Lidar Inertial Odometry

Hongru Xiao, Yanqun Han, Junqiao Zhao*, Jiafeng Cui, Lu Xiong and Zhuoping Yu

IEEE Robotics and Automation Letters (RAL), vol. 7, pp. 446-453, IEEE, 2022.

TL;DR: Tightly integrates a vehicle-dynamics model into LiDAR-inertial odometry to improve motion estimation for autonomous vehicles.

融合车辆动力学的双目视觉惯性SLAM研究

余卓平, 鞠然, 韩燕群 and 赵君峤*

华中科技大学学报(自然科学版), 2022.

TL;DR: Integrates vehicle-dynamics constraints into stereo visual-inertial SLAM to improve state estimation under degenerate ground-vehicle motion.

G-VIDO: A Vehicle Dynamics and Intermittent GNSS Aided Visual-Inertial State Estimator For Autonomous Driving

Lu Xiong, Rong Kang, Junqiao Zhao*, Peizhi Zhang, Mingyu Xu, Ran Ju, Chen Ye and Tiantian Feng

IEEE Transactions on Intelligent Transportation Systems, vol. 23, no. 8, pp. 11845-11861, 2022.

TL;DR: Combines vehicle-dynamics constraints and intermittent GNSS with visual-inertial estimation, using anomaly detection for robust localization across GNSS conditions.

Weighted octree-based 3D indoor pathfinding for multiple locomotion types

Junqiao Zhao, Qiaoyu Xu, Sisi Zlatanova, Liu Liu, Chen Ye and Tiantian Feng

International Journal of Applied Earth Observation and Geoinformation, vol. 112, pp. 102900, 2022.

TL;DR: Defines traversal costs for different locomotion types in a multiresolution octree to support indoor path planning for multiple robot types.