Stochastic Re-weighted Gradient Descent via Distributionally Robust Optimization

• URL: http://arxiv.org/abs/2306.09222v5
• Date: Sun, 13 Oct 2024 04:07:11 GMT
• Title: Stochastic Re-weighted Gradient Descent via Distributionally Robust Optimization
• Authors: Ramnath Kumar, Kushal Majmundar, Dheeraj Nagaraj, Arun Sai Suggala,
• Abstract summary: We present Reweighted Gradient Descent (RGD), a novel optimization technique that improves the performance of deep neural networks through dynamic sample re-weighting. We demonstrate the effectiveness of RGD on various learning tasks, including supervised learning, meta-learning, and out-of-domain generalization.
• Score: 14.23697277904244
• License:
• Abstract: We present Re-weighted Gradient Descent (RGD), a novel optimization technique that improves the performance of deep neural networks through dynamic sample re-weighting. Leveraging insights from distributionally robust optimization (DRO) with Kullback-Leibler divergence, our method dynamically assigns importance weights to training data during each optimization step. RGD is simple to implement, computationally efficient, and compatible with widely used optimizers such as SGD and Adam. We demonstrate the effectiveness of RGD on various learning tasks, including supervised learning, meta-learning, and out-of-domain generalization. Notably, RGD achieves state-of-the-art results on diverse benchmarks, with improvements of +0.7% on DomainBed, +1.44% on tabular classification, \textcolor{blue}+1.94% on GLUE with BERT, and +1.01% on ImageNet-1K with ViT.

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