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Liquan Wang

9 accepted papers

2026

Hierarchical Policy Learning via Spectral Decomposition

ICML 2026poster

In this paper, we identify a semantic decomposition in robot action sequences, separating task-level motion intent from execution-level refinements. By analyzing actions in the spectral domain using the discrete cosine transform (DCT), we observe that low-frequency components capture global motion t…

Cited by 0SourceScholar
2026

ReSteer: Quantifying and Refining the Steerability of Multitask Robot Policies

RSS 2026poster

Despite strong multi-task pretraining, existing policies often exhibit poor task steerability. For example, a robot may fail to respond to a new instruction “put the bowl in the sink” when moving towards the oven, executing “close the oven”, even though it can complete both tasks when executed separ…

Cited by 0SourceScholar
2025

TopoCut: Learning Multi-Step Cutting with Spectral Rewards and Discrete Diffusion Policies

CoRL 2025poster

Robotic manipulation tasks involving cutting deformable objects remain challenging due to complex topological behaviors, difficulties in perceiving dense object states, and the lack of efficient evaluation methods for cutting outcomes. In this paper, we introduce TopoCut, a comprehensive benchmark f…

Cited by 0SourceScholar
2024

Discovering Robotic Interaction Modes with Discrete Representation Learning

CoRL 2024poster

Abstract: Human actions manipulating articulated objects, such as opening and closing a drawer, can be categorized into multiple modalities we define as interaction modes. Traditional robot learning approaches lack discrete representations of these modes, which are crucial for empirical sampling and…

Cited by 1SourcecodeScholar
2024

Enhancing Joint Dynamics Modeling for Underwater Robotics Through Stochastic Extension

RA-L 2024

Accurate joint dynamics models are essential for the compliance and robustness of robot control, especially for robots operating in complex underwater environments. To improve the precision of joint dynamics models, much research focuses on refining specific parameters or incorporating previously ov

Cited by 1SourceScholar
2024

Learning Locomotion for Quadruped Robots via Distributional Ensemble Actor-Critic

RA-L 2024

Domain randomization introduces perturbations in the simulation to make controllers less susceptible to the reality gap, which enables remarkable sim-to-real transfer on real quadruped robots. However, aleatoric uncertainty originating from perturbations could often lead to suboptimal controllers. I

Cited by 10SourceScholar
2023

Self-Supervised Learning of Action Affordances as Interaction Modes

ICRA 2023poster

When humans perform a task with an articulated object, they interact with the object only in a handful of ways, while the space of all possible interactions is nearly endless. This is because humans have prior knowledge about what interactions are likely to be successful, i.e., to open a new door we…

Cited by 5SourcecodeScholar
2022

Grasp’D: Differentiable Contact-Rich Grasp Synthesis for Multi-Fingered Hands

ECCV 2022poster

"The study of hand-object interaction requires generating viable grasp poses for high-dimensional multi-finger models, often relying on analytic grasp synthesis which tends to produce brittle and unnatural results. This paper presents Grasp’D, an approach to grasp synthesis by differentiable contact…

2021

GIFT: Generalizable Interaction-aware Functional Tool Affordances without Labels

RSS 2021poster

Tool use requires reasoning about the fit between an object’s affordances and the demands of a task. Visual affordance learning can benefit from goal-directed interaction experience; but current techniques rely on human labels or expert demonstrations to generate this data. In this paper; we describ…

Cited by 35SourcePDFScholar