Parameter Re-Initialization through Cyclical Batch Size Schedules [article]

Norman Mu and Zhewei Yao and Amir Gholami and Kurt Keutzer and Michael Mahoney
<span title="2018-12-04">2018</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Optimal parameter initialization remains a crucial problem for neural network training. A poor weight initialization may take longer to train and/or converge to sub-optimal solutions. Here, we propose a method of weight re-initialization by repeated annealing and injection of noise in the training process. We implement this through a cyclical batch size schedule motivated by a Bayesian perspective of neural network training. We evaluate our methods through extensive experiments on tasks in
more &raquo; ... age modeling, natural language inference, and image classification. We demonstrate the ability of our method to improve language modeling performance by up to 7.91 perplexity and reduce training iterations by up to 61%, in addition to its flexibility in enabling snapshot ensembling and use with adversarial training.
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