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Author

Guozhong Li

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Book Open access Aug 2026

Structure-Aware Abstraction of Hierarchical Time Series

This work provides the first formal analysis of HTSA, proving its NP-hardness and showing that the objective is neither monotone nor submodular, and proposes OSS, whose discretized search provides a 1/alpha-approximation guarantee for each single optimal-subtree computation.

Yihan Wu, Xuliang Zhu, Guozhong Li et al. · 0 citations
Preprint Aug 2026

KVDiagnosis: A Diagnostic Benchmark for KV-Cache Compression in Long-Context Language Models

This work presents KVDiagnosis, a diagnostic dataset and benchmark with three contributions, a 25-method taxonomy that groups methods into five mechanism families and links them to eight verified implementations and their valid diagnostic measurements, and a common record format.

Chen Qiu, Ziwu Liu, Chao Fei et al. · 1 citation

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