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Zhiyong Xu

4 accepted papers

2026

Mixture-Of-Experts Policy for Smooth and Stable Multi-Posture Fall Recovery in Bipedal Robot

ICRA 2026poster

Bipedal robots are inherently prone to falling due to their higher center of mass and narrower support polygon, making automatic fall recovery a long-standing challenge. Existing approaches often rely on posture-specific strategies or exhibit limited robustness and generalization, restricting their …

Cited by 0Scholar
2026

PromptEnhancer: Taming Your Rewriter for Text-to-Image Generation via Fine-Grained Reward

CVPR 2026

Recent text-to-image (T2I) diffusion models have achieved impressive progress in generating high-fidelity images, yet they often fail to faithfully follow complex user prompts, especially in attribute binding, negation, and compositional reasoning. To address this limitation, we propose PromptEnhanc

Cited by 0SourcecodeScholar
2026

Ripple Shapley: Data Influence Attribution in One Federated Training Run

AAAI 2026technical

Contribution evaluation is essential for incentivizing high-quality data sharing in federated learning (FL), yet existing Shapley-value-based methods are prohibitively expensive and overlook temporal influence propagation. In this paper, we propose Ripple Shapley, a novel attribution framework that

Cited by 0SourcePDFScholar
2025

Enhancing the Flexibility of a Quadruped Robot with a 2-DOF Active Spine Using Nonlinear Model Predictive Control

IROS 2025

For quadrupeds, a flexible spine allows them to traverse space and make quick turns. From the perspective of mechanical design in quadruped robots, an active spine with 2 degrees of freedom (2-DOF) can achieve dynamic posture adjustment similar to biological organisms which allows for pitch and yaw

Cited by 0SourceScholar