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【GNN】图解GNN： A gentle introduction（含视频）
2022-07-07 01:12:00 【静静喜欢大白】
目录
GNN
Why
What
Tasks
目前最常见还是节点分类和链接预测
图分类常见于蛋白质、药物领域
How
特征X
邻接矩阵A（连接情况）
通过局部邻域表示
2层GNN示例
计算C节点表示
计算D节点 表示
关键
核心：置换不变性
即无论如何交换任意节点顺序等，都会得到唯一输出，对应唯一图
等变性
即输入变化，输出也做出对应变化
MP
GCN
紫色：聚合邻域
蓝色：W消息，f激活，B参数
橙色：对最终输出影响做大的其实就是节点自身信息
GAT
参考
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