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Learning Imbalanced Datasets with Label-Distribution-Aware Margin Loss
TLDR
A theoretically-principled label-distribution-aware margin (LDAM) loss motivated by minimizing a margin-based generalization bound is proposed that replaces the standard cross-entropy objective during training and can be applied with prior strategies for training with class-imbalance such as re-weighting or re-sampling.
Generalization and equilibrium in generative adversarial nets (GANs) (invited talk)
Generative Adversarial Networks (GANs) have become one of the dominant methods for fitting generative models to complicated real-life data, and even found unusual uses such as designing good
MOPO: Model-based Offline Policy Optimization
TLDR
A new model-based offline RL algorithm is proposed that applies the variance of a Lipschitz-regularized model as a penalty to the reward function, and it is found that this algorithm outperforms both standard model- based RL methods and existing state-of-the-art model-free offline RL approaches on existing offline RL benchmarks, as well as two challenging continuous control tasks.
Finding approximate local minima faster than gradient descent
We design a non-convex second-order optimization algorithm that is guaranteed to return an approximate local minimum in time which scales linearly in the underlying dimension and the number of
Matrix Completion has No Spurious Local Minimum
TLDR
It is proved that the commonly used non-convex objective function for positive semidefinite matrix completion has no spurious local minima --- all local minata must also be global.
Fixup Initialization: Residual Learning Without Normalization
TLDR
This work proposes fixed-update initialization (Fixup), an initialization motivated by solving the exploding and vanishing gradient problem at the beginning of training via properly rescaling a standard initialization that enables residual networks without normalization to achieve state-of-the-art performance in image classification and machine translation.
A Latent Variable Model Approach to PMI-based Word Embeddings
TLDR
A new generative model is proposed, a dynamic version of the log-linear topic model of Mnih and Hinton (2007) to use the prior to compute closed form expressions for word statistics, and it is shown that latent word vectors are fairly uniformly dispersed in space.
Verified Uncertainty Calibration
TLDR
The scaling-binning calibrator is introduced, which first fits a parametric function to reduce variance and then bins the function values to actually ensure calibration, and estimates a model's calibration error more accurately using an estimator from the meteorological community.
Algorithmic Framework for Model-based Reinforcement Learning with Theoretical Guarantees
TLDR
A novel algorithmic framework for designing and analyzing model-based RL algorithms with theoretical guarantees is introduced and a meta-algorithm with a theoretical guarantee of monotone improvement to a local maximum of the expected reward is designed.
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