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Efficient Forward Architecture Search

NeurIPS 2019 · Architectures and efficiency › Neural architecture search · approach: Bi-level differentiable NAS · 9 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Grow a macro-search network by adding selected shortcut connectionsmodified ResNet seed · CIFAR-10test error: 4.6 -> 2.85± 0.12Helped
Grow a cell-search network by adding selected shortcut connectionsmodified ResNet seed · CIFAR-10test error: 4.6 -> 2.87 ± 0.13Helped
Transfer the searched cell architecture to ImageNetPetridish cell · ILSVRC2012top-1 test error: 26.3 ± 0.20Helped
Search recurrent cells through iterative growthPetridish · PTBtest perplexity: 55.85 | 56.39± 0.38; Random search WS: 55.5Mixed
Search in proxy space rather than directly in final-scale space (ablation)Petridish cell · ILSVRC2012top-1 test error: 26.9 -> 26.3Helped
Add concat-projection each time weak learners are finalized instead of retaining weighted sums (ablation)Petridish macro · ILSVRC2012top-1 test error: 32.5 -> 29.4Helped
Add concat-projection each time weak learners are finalized instead of retaining weighted sums (ablation)Petridish cell · ILSVRC2012top-1 test error: 32.7 -> 26.9Helped
Add concat-projection during weak-learner finalization rather than only switching in the final model (ablation)Petridish macro · ILSVRC2012top-1 test error: 29.1 -> 29.4No clear effect
Add concat-projection during weak-learner finalization rather than only switching in the final model (ablation)Petridish cell · ILSVRC2012top-1 test error: 27.2 -> 26.9Helped
Isolate weak learners from the existing model during weak learning instead of jointly training random weak learners with it (ablation)Petridish cell · ILSVRC2012top-1 test error: 32.8 -> 26.9Helped
Select 3 operations per weak learner rather than 2 (ablation)Petridish · CIFAR-10average lowest error rate: 3.08 -> 2.88Helped
Select 3 operations per weak learner rather than 4 (ablation)Petridish · CIFAR-10average lowest error rate: 2.93 -> 2.88Helped

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