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Meta-Learning of Neural Architectures for Few-Shot Learning

CVPR 2020 · Architectures and efficiency › Neural architecture search · approach: Efficient NAS search strategies · 153 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Meta-learn and adapt both architecture and weights rather than using the REPTILE fixed architectureMetaNAS vs REPTILE · MiniImagenet, 1-shot, 5-wayaccuracy (%): 48.17 ± 0.93 -> 54.86 ± 0.77Helped
Meta-learn and adapt both architecture and weights rather than using the REPTILE fixed architectureMetaNAS vs REPTILE · Omniglot, 1-shot, 20-wayaccuracy (%): 89.33 ± 0.07 -> 94.40 ± 0.61Helped
Use MetaNAS instead of AutoMeta under the same REPTILE training pipelineMetaNAS vs AutoMeta · Omniglot, 1-shot, 20-wayaccuracy (%): 95.60 ± 0.12 -> 94.40 ± 0.61Hurt
Use MetaNAS instead of AutoMeta under the same REPTILE training pipelineMetaNAS vs AutoMeta · MiniImagenet, 1-shot, 5-wayaccuracy (%): 50.50 ± 0.76 -> 54.86 ± 0.77Helped
Scale up MetaNAS architecture, train longer, and add regularizationMetaNAS* · MiniImagenet, 1-shot, 5-wayaccuracy (%): 57.6 ± 0.2 -> 63.1 ± 0.3Helped
Scale up MetaNAS architecture, train longer, and add regularizationMetaNAS* · MiniImagenet, 5-shot, 5-wayaccuracy (%): 74.7 ± 0.2 -> 79.5 ± 0.2Helped
Scale up MetaNAS architecture, train longer, and add regularizationMetaNAS* · Omniglot, 1-shot, 20-wayaccuracy (%): 97.65 ± 0.05 -> 97.87 ± 0.07Helped
Sparsify both operation mixtures and input-node combinations before pruning (ablation)DARTS · CIFAR-10, after pruningaccuracy: 16.7 ± 2.1 % -> 84.7 ± 0.4 %Helped
Also sparsify input nodes, beyond sparsifying operations only (ablation)DARTS · CIFAR-10, after pruningaccuracy: 60.2 ± 4.0 % -> 84.7 ± 0.4 %Helped
Sparsify operations only, leaving input nodes unsparsified (ablation)DARTS · CIFAR-10, after pruningaccuracy: 16.7 ± 2.1 % -> 60.2 ± 4.0 %Helped
Hard-prune without sparsifying operations or inputs (ablation)DARTS · CIFAR-10, before vs after pruningaccuracy: 87.9 ± 0.2 % -> 16.7 ± 2.1 %Hurt
Hard-prune after sparsifying operations only (ablation)DARTS · CIFAR-10, before vs after pruningaccuracy: 84.4 ± 0.4 % -> 60.2 ± 4.0 %Hurt

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