Before revision:  Identification of promising classifiers is dependent, in part, on hyperparameter optimization (HO) , for which a number of approaches including grid search, random sampling and Bayesian optimization have been shown to be effective.
After revision:  Identification of promising classifiers is dependent, in part, on hyperparameter optimization (HO) for which a number of approaches including grid search, random sampling and Bayesian optimization have been shown to be effective.