AlexNet 2048 2048 dense 192 192 128 11 48 128 3 13 *28 224 5 I3. 03 dense dense 27 11 755 1000 192 192 128Ma× 2048 224 Max pooling 2048 Stride 128 Max of 4 pooling pooling 3 48 D2L.ai AlexNet