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Rui Ai

16 accepted papers

2026

Beyond Majority Voting: LLM Aggregation by Leveraging Higher-Order Information

ICML 2026poster

With the rapid progress of multi-agent large language model (LLM) reasoning, how to effectively aggregate answers from multiple LLMs has emerged as a fundamental challenge. Standard majority voting treats all answers equally, failing to consider latent heterogeneity and correlation across models. In…

Cited by 0SourceScholar
2025

An Instrumental Value for Data Production and its Application to Data Pricing

ICML 2025poster

We develop a framework for capturing the instrumental value of data production processes, which accounts for two key factors: (a) the context of the agent’s decision-making; (b) how much data or information the buyer already possesses. We "micro-found" our data valuation function by establishing its…

Cited by 0SourcePDFScholar
2025

Contextual Online Decision Making with Infinite-Dimensional Functional Regression

ICML 2025poster

Contextual sequential decision-making is fundamental to machine learning, with applications in bandits, sequential hypothesis testing, and online risk control. These tasks often rely on statistical measures like expectation, variance, and quantiles. In this paper, we propose a universal algorithmic…

Cited by 1SourcePDFScholar
2025

Diffusion-Based Planning for Autonomous Driving with Flexible Guidance

ICLR 2025oral

Achieving human-like driving behaviors in complex open-world environments is a critical challenge in autonomous driving. Contemporary learning-based planning approaches such as imitation learning methods often struggle to balance competing objectives and lack of safety assurance,due to limited adapt…

Cited by 3SourcePDFScholar
2025

Less is More: Improving LLM Alignment via Preference Data Selection

NeurIPS 2025spotlight

Direct Preference Optimization (DPO) has emerged as a promising approach for aligning large language models with human preferences. While prior work mainly extends DPO from the aspect of the objective function, we instead improve DPO from the largely overlooked but critical aspect of data selection.…

Cited by 0SourceScholar
2025

The Sample Complexity of Online Strategic Decision Making with Information Asymmetry and Knowledge Transportability

ICML 2025poster

Information asymmetry is a pervasive feature of multi-agent systems, especially evident in economics and social sciences. In these settings, agents tailor their actions based on private information to maximize their rewards. These strategic behaviors often introduce complexities due to confounding v…

Cited by 0SourcePDFScholar
2024

Cam4DOcc: Benchmark for Camera-Only 4D Occupancy Forecasting in Autonomous Driving Applications

CVPR 2024poster

Understanding how the surrounding environment changes is crucial for performing downstream tasks safely and reliably in autonomous driving applications. Recent occupancy estimation techniques using only camera images as input can provide dense occupancy representations of large-scale scenes based on…

2024

Contextual Decision-Making with Knapsacks Beyond the Worst Case

NeurIPS 2024poster

We study the framework of a dynamic decision-making scenario with resource constraints. In this framework, an agent, whose target is to maximize the total reward under the initial inventory, selects an action in each round upon observing a random request, leading to a reward and resource consumption…

Cited by 0SourcePDFScholar
2024

Dynamic Service Fee Pricing under Strategic Behavior: Actions as Instruments and Phase Transition

NeurIPS 2024poster

We study a dynamic pricing problem for third-party platform service fees under strategic, far-sighted customers. In each time period, the platform sets a service fee based on historical data, observes the resulting transaction quantities, and collects revenue. The platform also monitors equilibrium…

Cited by 0SourcePDFScholar
2024

Eliminating Warping Shakes for Unsupervised Online Video Stitching

ECCV 2024poster

"In this paper, we retarget video stitching to an emerging issue, named warping shake, when extending image stitching to video stitching. It unveils the temporal instability of warped content in non-overlapping regions, despite image stitching having endeavored to preserve the natural structures. Th…

2024

ModaLink: Unifying Modalities for Efficient Image-to-PointCloud Place Recognition

IROS 2024poster

Place recognition is an important task for robots and autonomous cars to localize themselves and close loops in pre-built maps. While single-modal sensor-based methods have shown satisfactory performance, cross-modal place recognition that retrieving images from a point-cloud database remains a chal…

Cited by 3SourcecodeScholar
2024

SuperFusion: Multilevel LiDAR-Camera Fusion for Long-Range HD Map Generation

ICRA 2024poster

High-definition (HD) semantic map generation of the environment is an essential component of autonomous driving. Existing methods have achieved good performance in this task by fusing different sensor modalities, such as LiDAR and camera. However, current works are based on raw data or network featu…

Cited by 54SourcecodeScholar
2024

WeatherDepth: Curriculum Contrastive Learning for Self-Supervised Depth Estimation under Adverse Weather Conditions

ICRA 2024poster

Depth estimation models have shown promising performance on clear scenes but fail to generalize to adverse weather conditions due to illumination variations, weather particles, etc. In this paper, we propose WeatherDepth, a self-supervised robust depth estimation model with curriculum contrastive le…

Cited by 15SourcecodeScholar
2023

I2P-Rec: Recognizing Images on Large-Scale Point Cloud Maps Through Bird's Eye View Projections

IROS 2023poster

Place recognition is an important technique for autonomous cars to achieve full autonomy since it can provide an initial guess to online localization algorithms. Although current methods based on images or point clouds have achieved satisfactory performance, localizing the images on a large-scale po…

Cited by 14SourceScholar
2022

Efficient Spatial-Temporal Information Fusion for LiDAR-Based 3D Moving Object Segmentation

IROS 2022poster

Accurate moving object segmentation is an es-sential task for autonomous driving. It can provide effective information for many downstream tasks, such as collision avoidance, path planning, and static map construction. How to effectively exploit the spatial-temporal information is a critical questio…

Cited by 86SourcecodeScholar
2022

OverlapTransformer: An Efficient and Yaw-Angle-Invariant Transformer Network for LiDAR-Based Place Recognition

RA-L 2022

Place recognition is an important capability for autonomously navigating vehicles operating in complex environments and under changing conditions. It is a key component for tasks such as loop closing in SLAM or global localization. In this letter, we address the problem of place recognition based on

Cited by 203SourceScholar