Search Results for author: Huong Ha

Found 10 papers, 5 papers with code

High-dimensional Bayesian Optimization via Covariance Matrix Adaptation Strategy

1 code implementation5 Feb 2024 Lam Ngo, Huong Ha, Jeffrey Chan, Vu Nguyen, Hongyu Zhang

To address this issue, a promising solution is to use a local search strategy that partitions the search domain into local regions with high likelihood of containing the global optimum, and then use BO to optimize the objective function within these regions.

Bayesian Optimization

Provably Efficient Bayesian Optimization with Unbiased Gaussian Process Hyperparameter Estimation

no code implementations12 Jun 2023 Huong Ha, Vu Nguyen, Hongyu Zhang, Anton Van Den Hengel

Our method uses a multi-armed bandit technique (EXP3) to add random data points to the BO process, and employs a novel training loss function for the GP hyperparameter estimation process that ensures unbiased estimation from the observed data.

Bayesian Optimization

Uncertainty-Aware Performance Prediction for Highly Configurable Software Systems via Bayesian Neural Networks

no code implementations27 Dec 2022 Huong Ha, Zongwen Fan, Hongyu Zhang

We also develop a novel uncertainty calibration technique to ensure the reliability of the confidence intervals generated by a Bayesian prediction model.

An Efficient Framework for Monitoring Subgroup Performance of Machine Learning Systems

no code implementations16 Dec 2022 Huong Ha

Particularly importance is the problem of monitoring the performance of machine learning systems across all the data subgroups (subpopulations).

Bayesian Optimization

ALT-MAS: A Data-Efficient Framework for Active Testing of Machine Learning Algorithms

no code implementations11 Apr 2021 Huong Ha, Sunil Gupta, Santu Rana, Svetha Venkatesh

Machine learning models are being used extensively in many important areas, but there is no guarantee a model will always perform well or as its developers intended.

BIG-bench Machine Learning Data Augmentation

High Dimensional Level Set Estimation with Bayesian Neural Network

1 code implementation17 Dec 2020 Huong Ha, Sunil Gupta, Santu Rana, Svetha Venkatesh

In particular, we consider two types of LSE problems: (1) \textit{explicit} LSE problem where the threshold level is a fixed user-specified value, and, (2) \textit{implicit} LSE problem where the threshold level is defined as a percentage of the (unknown) maximum of the objective function.

Vocal Bursts Intensity Prediction

Sub-linear Regret Bounds for Bayesian Optimisation in Unknown Search Spaces

no code implementations NeurIPS 2020 Hung Tran-The, Sunil Gupta, Santu Rana, Huong Ha, Svetha Venkatesh

To this end, we propose a novel BO algorithm which expands (and shifts) the search space over iterations based on controlling the expansion rate thought a hyperharmonic series.

Bayesian Optimisation

Distributionally Robust Bayesian Quadrature Optimization

1 code implementation19 Jan 2020 Thanh Tang Nguyen, Sunil Gupta, Huong Ha, Santu Rana, Svetha Venkatesh

We adopt the distributionally robust optimization perspective to this problem by maximizing the expected objective under the most adversarial distribution.

Cannot find the paper you are looking for? You can Submit a new open access paper.