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Watanabe, Tree-structured parzen estimator: Understanding its al- gorithm components and their roles for better empirical performance (2023)

18 Pith papers cite this work. Polarity classification is still indexing.

18 Pith papers citing it
abstract

Recent scientific advances require complex experiment design, necessitating the meticulous tuning of many experiment parameters. Tree-structured Parzen estimator (TPE) is a widely used Bayesian optimization method in recent parameter tuning frameworks such as Hyperopt and Optuna. Despite its popularity, the roles of each control parameter in TPE and the algorithm intuition have not been discussed so far. The goal of this paper is to identify the roles of each control parameter and their impacts on parameter tuning based on the ablation studies using diverse benchmark datasets. The recommended setting concluded from the ablation studies is demonstrated to improve the performance of TPE. Our TPE implementation used in this paper is available at https://github.com/nabenabe0928/tpe/tree/single-opt. OptunaHub now provides our standalone TPE implementation at https://hub.optuna.org/samplers/tpe_tutorial/.

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PENEX: AdaBoost-Inspired Neural Network Regularization

cs.LG · 2025-10-02 · unverdicted · novelty 6.0

PENEX is a new formulation of the multi-class exponential loss for neural networks that supports first-order optimization and improves generalization in low-data regimes.

Toto 2.0: Time Series Forecasting Enters the Scaling Era

cs.LG · 2026-05-19 · unverdicted · novelty 5.0 · 2 refs

Time series foundation models scale under a single training recipe, with forecast quality improving from 4M to 2.5B parameters and new SOTA results on BOOM, GIFT-Eval, and TIME benchmarks.

ORTHOBO: Orthogonal Bayesian Hyperparameter Optimization

cs.LG · 2026-05-07 · unverdicted · novelty 5.0

OrthoBO introduces an orthogonal acquisition estimator subtracting an optimally weighted score-function control variate to reduce Monte Carlo variance, preserve the acquisition target, and improve ranking stability in Bayesian hyperparameter optimization.

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