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- W4387211027 abstract "Advancements in neuroimaging technology have made it possible to measure the connectivity evolution between different brain regions over time. Emerging evidence shows that some critical brain regions, known as hub nodes, play a significant role in updating brain network connectivity over time. However, current spatiotemporal hub identification is built on static network-based approaches, where hub regions are identified independently for each temporal brain network without considering their temporal consistency, and fails to align the evolution of hubs with changes in connectivity dynamics. To address this problem, we propose a novel spatiotemporal hub identification method that utilizes dynamic graph embedding to distinguish temporal hubs from peripheral nodes. Specially, to preserve the time consistency information, we put the dynamic graph embedding learning upon a smooth physics model of network-to-network evolution, which mathematically expresses as a total variation of dynamic graph embedding with respect to time. A novel Grassmannian manifold optimization scheme is further introduced to learn the embeddings accurately and capture the time-varying topology of brain network. Experimental results on real data demonstrate the highest temporal consistency in hub identification, surpassing conventional approaches." @default.
- W4387211027 created "2023-10-01" @default.
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- W4387211027 date "2023-01-01" @default.
- W4387211027 modified "2023-10-17" @default.
- W4387211027 title "Spatiotemporal Hub Identification in Brain Network by Learning Dynamic Graph Embedding on Grassmannian Manifold" @default.
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- W4387211027 doi "https://doi.org/10.1007/978-3-031-43895-0_37" @default.
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