下图展示了一个有趣的现象：在法国斗牛犬的图像上添加一小块对抗性补丁后，VGG分类器竟然以极高的置信度将其判定为足球。Grad-CAM可视化清楚地显示，模型的注意力完全从狗身上转移到了那块补丁——一个精心构造的小扰动就足以劫持整个决策过程。

Just one day after the U.S. raid in Venezuela and capture of Nicolas Maduro, President Trump turned his sights northward to the island of Greenland. On January 5, President Trump affirmed, “we need ...

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