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Zikai Xiao

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#artificial intelligence Preprint Oct 2026

Linear Fitness Subspace in Protein Language Models Enables Sample-Efficient Directed Evolution

Model-guided directed evolution seeks to identify high-fitness protein variants under limited oracle budgets. Protein language models (PLMs) provide rich representations for this task, but task-agnostic zero-shot scores can be misaligned with a target assay, while supervised search in high-dimensional embedding spaces...

Si-Yuan Ma, Can-Ran Xiao, Zi-Kai Xiao et al. · 0 citations

Revisiting Lossy Verification in Speculative Decoding: Mechanisms, Trade-offs, and Failure Modes

This work presents a principled analysis of the distributions induced by lossy verification methods, and shows that many seemingly distinct approaches differ only superficially and can be unified into two categories: truncation-based verification and collaborative verification.

Tian-Yu Wang, Yuxuan Zhou, Heng Li et al. · 0 citations
Open access Aug 2026

Bridging Model Heterogeneity in Federated Learning with Group Prototypical Alignment

FedGPA is proposed, a hierarchical framework in which clients with comparable resources and identical architectures form a group and a server mediates knowledge transfer across groups of diverse models, and at its core, the lightweight, model-agnostic Aligned Co-decision (Alco) Unit aligns class-level prototypical info...

Liyinglan Liu, Zikai Xiao, Zi-Han Chen et al. · 0 citations
Preprint Aug 2026

MemPrism: Task-Conditioned Relational Memory Views for Long-Horizon Agents

Experiments on long-horizon embodied and web-agent benchmarks show that MemPrism consistently improves the task performance, especially as trajectories become longer, while reducing memory token consumption.

Zhi-Sheng Chen, Bingfan Zeng, Bangde Cao et al. · 0 citations

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