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Dropout is a simple and effective way to improve the generalization performance of deep neural networks (DNNs) and prevent overfitting. This paper discusses three novel observations about dropout when applied to DNNs with rectified linear unit (ReLU): 1) dropout encourages each local linear model of a DNN to be trained on data points from nearby regions; 2) applying the same dropout rate to different layers can result in significantly different (effective) deactivation rates; and 3) when batch normalization is also used, the rescaling factor of dropout causes a normalization inconsistency between training and testing. The above leads to three simple but nontrivial dropout modifications resulting in our proposed method ``jumpout.'' Jumpout samples the dropout rate from a monotone decreasing distribution (e.g., the right half of a Gaussian), so each local linear model is trained, with high probability, to work better for data points from nearby than from more distant regions. Jumpout moreover adaptively normalizes the dropout rate at each layer and every training batch, so the effective deactivation rate applied to the activated neurons are kept the same. Furthermore, it rescales the outputs for a better tradeoff that keeps both the variance and mean of neurons more consistent between training and test phases, thereby mitigating the incompatibility between dropout and batch normalization. Jumpout shows significantly improved performance on CIFAR10, CIFAR100, FashionMNIST, STL10, SVHN, ImageNet1k, etc., while introducing negligible additional memory and computation costs.
Author Information
Shengjie Wang ("University of Washington, Seattle")
Tianyi Zhou (University of Washington)
Tianyi Zhou is a tenuretrack assistant professor of Computer Science and UMIACS at the University of Maryland, College Park. He received his Ph.D. from the University of Washington, Seattle. His research interests are machine learning, optimization, and natural language processing. His recent works focus on curriculum learning, hybrid humanartificial intelligence, trustworthy and robust AI, plasticitystability tradeoff in ML, large language and multimodality models, reinforcement learning, federated learning, and metalearning. He has published ~90 papers at NeurIPS, ICML, ICLR, AISTATS, ACL, EMNLP, NAACL, COLING, CVPR, KDD, ICDM, AAAI, IJCAI, ISIT, Machine Learning (Springer), IEEE TIP/TNNLS/TKDE, etc. He is the recipient of the Best Student Paper Award at ICDM 2013 and the 2020 IEEE TCSC Most Influential Paper Award. He served as an SPC member or area chair in AAAI, IJCAI, KDD, WACV, etc. Tianyi was a visiting research scientist at Google and a research intern at Microsoft Research Redmond and Yahoo! Labs.
Jeff Bilmes (UW)
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2019 Poster: Jumpout : Improved Dropout for Deep Neural Networks with ReLUs »
Wed. Jun 12th 01:30  04:00 AM Room Pacific Ballroom #29
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