Author

Weikai Xu

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#machine learning Preprint Oct 2026

Understanding and Mitigating Training Instability in Large-Scale Recommender Systems: A Cascade Perspective

Training large-scale recommender systems on dynamic industrial platforms, such as Short-Form Video (SFV) services with billions of daily interactions, faces critical stability challenges. Rapid distribution shifts in user data and increasing model complexity frequently trigger a divergence cascade, typically initiating...

Yue-Ning Li, Ze-Yu Wang, Zhen Zhang et al. · 0 citations

Preprint Aug 2026

AppDeltaWorld: Transition-Grounded Delta Code World Model for Mobile GUI Agents

AppDeltaWorld is proposed, a transition-grounded delta code world model that predicts the next GUI as a reachable code update rather than as an unconstrained image or text description, and achieves the highest fidelity on CMGUIBench-500 under Code2World evaluation.

Weikai Xu, Yu Feng, Haoxiang Lei et al. · 1 citation