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Neural Network Pruning With Residual-Connections and Limited-Data

CVPR 2020 · Architectures and efficiency › Pruning and efficient tuning · approach: Structured network pruning · 128 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Prune channels inside and outside residual connections using a KL-divergence criterion, producing a wallet-shaped structureResNet50 · ImageNetTop-1 Acc.: 73.39% vs. 73.05%Helped
Use wallet-shaped pruning instead of hourglass-shaped pruningResNet50 · ImageNet, 1.39G MACsinference time per mini-batch of 256 images: 0.21s -> 0.19sHelped
Directly prune MobileNetV2-1.0 on the target dataset with CURL instead of fine-tuning MobileNetV2-0.5MobileNetV2 · CUB200-2011accuracy: 73.96% -> 78.72%Helped
Add mixup to standard fine-tuning (ablation)CURL · CUB200-2011accuracy: 70.76 -> 73.89Helped
Add knowledge distillation to standard fine-tuning (ablation)CURL · CUB200-2011accuracy: 70.76 -> 77.87Helped
Combine mixup with knowledge distillation (ablation)CURL · CUB200-2011accuracy: 77.87 -> 77.99Helped
Add data expansion and label refinement after mixup plus knowledge distillation (ablation)CURL · CUB200-2011accuracy: 77.99 -> 78.72Helped
Train the pruned model from scratch instead of fine-tuning pretrained weights (ablation)CURL · CUB200-2011accuracy: 70.76 -> 64.39Hurt
Use KL-divergence rather than random selection, weight sum, or loss change to score filters (ablation)MobileNetV2 · CUB200-2011, pruning without fine-tuningaccuracy: 6.80% / 8.25% / 21.83% -> 66.33%Helped
Add label refinement (ablation)MobileNetV2 · CUB200-2011accuracy: 77.43% -> 78.72%Helped
Add label refinement (ablation)ResNet50 · Oxford Petsaccuracy: 90.32% -> 90.30%No clear effect
Update teacher soft targets during label refinement rather than keeping them fixed (ablation)MobileNetV2 · CUB200-2011accuracy: 78.56% -> 78.72%Helped

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