Automatic Setting of DNN Hyper-Parameters by Mixing Bayesian Optimization and Tuning Rules
This work addresses the challenge of manual hyper-parameter setting errors in deep learning for industrial and research applications, presenting an incremental improvement over existing methods.
The paper tackles the problem of hyper-parameter optimization for deep neural networks by improving Bayesian Optimization through a new algorithm that uses tuning rules to adjust hyper-parameters and reduce search space, resulting in enhanced performance.
Deep learning techniques play an increasingly important role in industrial and research environments due to their outstanding results. However, the large number of hyper-parameters to be set may lead to errors if they are set manually. The state-of-the-art hyper-parameters tuning methods are grid search, random search, and Bayesian Optimization. The first two methods are expensive because they try, respectively, all possible combinations and random combinations of hyper-parameters. Bayesian Optimization, instead, builds a surrogate model of the objective function, quantifies the uncertainty in the surrogate using Gaussian Process Regression and uses an acquisition function to decide where to sample the new set of hyper-parameters. This work faces the field of Hyper-Parameters Optimization (HPO). The aim is to improve Bayesian Optimization applied to Deep Neural Networks. For this goal, we build a new algorithm for evaluating and analyzing the results of the network on the training and validation sets and use a set of tuning rules to add new hyper-parameters and/or to reduce the hyper-parameter search space to select a better combination.