提出全局约束多分辨率框架,高效学习脑功能网络高阶结构
Beyond Pairwise Connections: Extracting High-Order Functional Brain Network Structures under Global Constraints
- 基于四种全局约束,在多尺度上学习脑网络结构
- 相对准确率提升30.6%,计算时间减少96.3%
- 适合认知神经科学与跨学科脑网络研究
功能脑网络(FBN)建模常依赖局部成对交互,其难以捕捉高阶依赖关系的问题在本文中被理论分析。当前超图建模方法存在计算负担重、依赖启发式设计等问题,阻碍了从数据分布直接端到端学习FBN结构。为此,本文提出一种面向全局约束的多分辨率(GCM)FBN结构学习框架,引入信号同步、个体身份、期望边数和数据标签四类全局约束,实现样本/个体/组/项目四个层级的建模分辨率。实验表明,相比9种基线和10种先进方法,GCM在5个数据集和2类任务设置下,相对准确率最高提升30.6%,计算时间降低96.3%。大量实验验证了各组件贡献,并凸显其可解释性。本工作为FBN结构学习提供新视角,奠定跨学科应用基础。代码已公开于https://github.com/lzhan94swu/GCM。
原文摘要 · Abstract (English)
Functional brain network (FBN) modeling often relies on local pairwise interactions, whose limitation in capturing high-order dependencies is theoretically analyzed in this paper. Meanwhile, the computational burden and heuristic nature of current hypergraph modeling approaches hinder end-to-end learning of FBN structures directly from data distributions. To address this, we propose to extract high-order FBN structures under global constraints, and implement this as a Global Constraints oriented Multi-resolution (GCM) FBN structure learning framework. It incorporates 4 types of global constraint (signal synchronization, subject identity, expected edge numbers, and data labels) to enable learning FBN structures for 4 distinct levels (sample/subject/group/project) of modeling resolution. Experimental results demonstrate that GCM achieves up to a 30.6% improvement in relative accuracy and a 96.3% reduction in computational time across 5 datasets and 2 task settings, compared to 9 baselines and 10 state-of-the-art methods. Extensive experiments validate the contributions of individual components and highlight the interpretability of GCM. This work offers a novel perspective on FBN structure learning and provides a foundation for interdisciplinary applications in cognitive neuroscience. Code is publicly available on https://github.com/lzhan94swu/GCM.
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