Author

Zi-Han Wang

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#machine learning Preprint Sep 2026

Embedded Graph Flows for Categorical Graph Generation

Generating categorical graphs requires choosing node and edge types that form a coherent structure without depending on node order. Many graph generators encode categories as fixed one-hot vectors, which can impose an artificial geometry in which categories are equidistant. We propose Embedded Graph Flows (EGF), a gene...

Ethan Ma, Zi-Han Wang, C. Chow et al. · 0 citations

#artificial intelligence Preprint Sep 2026

Shadow Queries for Private Retrieval in Vector Databases

SHAQ (shadow query generation), a semantic-decomposition and embedding-decoupling defense against EIAs, is proposed, which uses a generative language model to create diverse shadow queries that capture different semantic aspects of each document.

Xinguo Feng, Zhongkui Ma, Zi-Han Wang et al. · 0 citations