Author

Jiamian Wang

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Preprint Aug 2026

HindSearch: Trajectory-Level Hindsight Critique for Search-Augmented Reinforcement Learning

HindSearch is introduced, a hindsight self-distillation procedure for GRPO: after each rollout, a frozen judge writes a short critique of every failed trajectory using the gold answer, and the critique supplies an auxiliary on-policy distillation signal on the student's search actions.

Hao-Wei Liu, Jiamian Wang, Hsin-Tai Wu et al. · 0 citations

Preprint Jul 2026

Latent-Centroid Steering: Single-Pass Classifier-Free Guidance for Command-Aligned Autonomous Driving

This work shows that CFG can be interpreted as isolating the instruction-induced residual in the action space by contrasting conditional and unconditional predictions, thereby explicitly amplifying the effect of the navigation command at inference time, and proposes Latent-Centroid Steering (LCS), a single-pass guidanc...

Meibo Hu, Jiamian Wang, Pichao Wang et al. · 0 citations

#artificial intelligence Preprint Sep 2026

Spurious Advantage Hidden in GRPO

SignBALANCE is proposed, whose magnitude is composition-free: it keeps the verifier sign, uses a global scale, and restores zero-mean balance via a stop-gradient per-class rescaling.

Jiamian Wang, Samyadeep Basu, Koustava Goswami et al. · 0 citations