Search Results for author: Luigi Nardi

Found 28 papers, 16 papers with code

Vanilla Bayesian Optimization Performs Great in High Dimensions

1 code implementation3 Feb 2024 Carl Hvarfner, Erik Orm Hellsten, Luigi Nardi

High-dimensional problems have long been considered the Achilles' heel of Bayesian optimization algorithms.

Bayesian Optimization

A General Framework for User-Guided Bayesian Optimization

1 code implementation24 Nov 2023 Carl Hvarfner, Frank Hutter, Luigi Nardi

The optimization of expensive-to-evaluate black-box functions is prevalent in various scientific disciplines.

Bayesian Optimization

High-dimensional Bayesian Optimization with Group Testing

1 code implementation5 Oct 2023 Erik Orm Hellsten, Carl Hvarfner, Leonard Papenmeier, Luigi Nardi

We propose a group testing approach to identify active variables to facilitate efficient optimization in these domains.

Bayesian Optimization

Bounce: Reliable High-Dimensional Bayesian Optimization for Combinatorial and Mixed Spaces

1 code implementation NeurIPS 2023 Leonard Papenmeier, Luigi Nardi, Matthias Poloczek

Impactful applications such as materials discovery, hardware design, neural architecture search, or portfolio optimization require optimizing high-dimensional black-box functions with mixed and combinatorial input spaces.

Bayesian Optimization Neural Architecture Search +1

Out-of-Distribution Detection for Adaptive Computer Vision

no code implementations16 May 2023 Simon Kristoffersson Lind, Rudolph Triebel, Luigi Nardi, Volker Krueger

It is well known that computer vision can be unreliable when faced with previously unseen imaging conditions.

Out-of-Distribution Detection

Increasing the Scope as You Learn: Adaptive Bayesian Optimization in Nested Subspaces

2 code implementations22 Apr 2023 Leonard Papenmeier, Luigi Nardi, Matthias Poloczek

Recent advances have extended the scope of Bayesian optimization (BO) to expensive-to-evaluate black-box functions with dozens of dimensions, aspiring to unlock impactful applications, for example, in the life sciences, neural architecture search, and robotics.

Bayesian Optimization Neural Architecture Search

BaCO: A Fast and Portable Bayesian Compiler Optimization Framework

1 code implementation1 Dec 2022 Erik Hellsten, Artur Souza, Johannes Lenfers, Rubens Lacouture, Olivia Hsu, Adel Ejjeh, Fredrik Kjolstad, Michel Steuwer, Kunle Olukotun, Luigi Nardi

We introduce the Bayesian Compiler Optimization framework (BaCO), a general purpose autotuner for modern compilers targeting CPUs, GPUs, and FPGAs.

Compiler Optimization

Falsification of Cyber-Physical Systems using Bayesian Optimization

no code implementations14 Sep 2022 Zahra Ramezani, Kenan Šehić, Luigi Nardi, Knut Åkesson

For some of the benchmark problems, the choice of acquisition function clearly affects the number of simulations needed for successful falsification.

Bayesian Optimization

Joint Entropy Search for Maximally-Informed Bayesian Optimization

2 code implementations9 Jun 2022 Carl Hvarfner, Frank Hutter, Luigi Nardi

As a light-weight approach with superior results, JES provides a new go-to acquisition function for Bayesian optimization.

Bayesian Optimization Decision Making

$π$BO: Augmenting Acquisition Functions with User Beliefs for Bayesian Optimization

1 code implementation23 Apr 2022 Carl Hvarfner, Danny Stoll, Artur Souza, Marius Lindauer, Frank Hutter, Luigi Nardi

To address this issue, we propose $\pi$BO, an acquisition function generalization which incorporates prior beliefs about the location of the optimum in the form of a probability distribution, provided by the user.

Bayesian Optimization Hyperparameter Optimization

LassoBench: A High-Dimensional Hyperparameter Optimization Benchmark Suite for Lasso

1 code implementation4 Nov 2021 Kenan Šehić, Alexandre Gramfort, Joseph Salmon, Luigi Nardi

While Weighted Lasso sparse regression has appealing statistical guarantees that would entail a major real-world impact in finance, genomics, and brain imaging applications, it is typically scarcely adopted due to its complex high-dimensional space composed by thousands of hyperparameters.

Bayesian Optimization Hyperparameter Optimization +2

$\pi$BO: Augmenting Acquisition Functions with User Beliefs for Bayesian Optimization

no code implementations ICLR 2022 Carl Hvarfner, Danny Stoll, Artur Souza, Luigi Nardi, Marius Lindauer, Frank Hutter

To address this issue, we propose $\pi$BO, an acquisition function generalization which incorporates prior beliefs about the location of the optimum in the form of a probability distribution, provided by the user.

Bayesian Optimization Hyperparameter Optimization

Learning of Parameters in Behavior Trees for Movement Skills

1 code implementation27 Sep 2021 Matthias Mayr, Konstantinos Chatzilygeroudis, Faseeh Ahmad, Luigi Nardi, Volker Krueger

Reinforcement Learning (RL) is a powerful mathematical framework that allows robots to learn complex skills by trial-and-error.

Reinforcement Learning (RL)

Prior-guided Bayesian Optimization

no code implementations28 Sep 2020 Artur Souza, Luigi Nardi, Leonardo Oliveira, Kunle Olukotun, Marius Lindauer, Frank Hutter

While Bayesian Optimization (BO) is a very popular method for optimizing expensive black-box functions, it fails to leverage the experience of domain experts.

Bayesian Optimization

Bayesian Optimization with a Prior for the Optimum

no code implementations25 Jun 2020 Artur Souza, Luigi Nardi, Leonardo B. Oliveira, Kunle Olukotun, Marius Lindauer, Frank Hutter

We show that BOPrO is around 6. 67x faster than state-of-the-art methods on a common suite of benchmarks, and achieves a new state-of-the-art performance on a real-world hardware design application.

Bayesian Optimization

Polystore++: Accelerated Polystore System for Heterogeneous Workloads

no code implementations24 May 2019 Rekha Singhal, Nathan Zhang, Luigi Nardi, Muhammad Shahbaz, Kunle Olukotun

Modern real-time business analytic consist of heterogeneous workloads (e. g, database queries, graph processing, and machine learning).

DeepFreak: Learning Crystallography Diffraction Patterns with Automated Machine Learning

1 code implementation26 Apr 2019 Artur Souza, Leonardo B. Oliveira, Sabine Hollatz, Matt Feldman, Kunle Olukotun, James M. Holton, Aina E. Cohen, Luigi Nardi

In this paper, we introduce a new serial crystallography dataset comprised of real and synthetic images; the synthetic images are generated through the use of a simulator that is both scalable and accurate.

AutoML BIG-bench Machine Learning +1

Practical Design Space Exploration

no code implementations11 Oct 2018 Luigi Nardi, David Koeplinger, Kunle Olukotun

The proposed methodology follows a white-box model which is simple to understand and interpret (unlike, for example, neural networks) and can be used by the user to better understand the results of the automatic search.

DiffraNet: Automatic Classification of Serial Crystallography Diffraction Patterns

no code implementations27 Sep 2018 Artur Souza, Leonardo B. Oliveira, Sabine Hollatz, Matt Feldman, Kunle Olukotun, James M. Holton, Aina E. Cohen, Luigi Nardi

In this paper, we introduce a new serial crystallography dataset generated through the use of a simulator; the synthetic images are labeled and they are both scalable and accurate.

AutoML Classification

Analysis of DAWNBench, a Time-to-Accuracy Machine Learning Performance Benchmark

no code implementations4 Jun 2018 Cody Coleman, Daniel Kang, Deepak Narayanan, Luigi Nardi, Tian Zhao, Jian Zhang, Peter Bailis, Kunle Olukotun, Chris Re, Matei Zaharia

In this work, we analyze the entries from DAWNBench, which received optimized submissions from multiple industrial groups, to investigate the behavior of TTA as a metric as well as trends in the best-performing entries.

Benchmarking BIG-bench Machine Learning

Algorithmic Performance-Accuracy Trade-off in 3D Vision Applications Using HyperMapper

no code implementations2 Feb 2017 Luigi Nardi, Bruno Bodin, Sajad Saeedi, Emanuele Vespa, Andrew J. Davison, Paul H. J. Kelly

In this paper we investigate an emerging application, 3D scene understanding, likely to be significant in the mobile space in the near future.

Active Learning Scene Understanding

Comparative Design Space Exploration of Dense and Semi-Dense SLAM

no code implementations15 Sep 2015 M. Zeeshan Zia, Luigi Nardi, Andrew Jack, Emanuele Vespa, Bruno Bodin, Paul H. J. Kelly, Andrew J. Davison

SLAM has matured significantly over the past few years, and is beginning to appear in serious commercial products.

Benchmarking

Reasoning in complex environments with the SelectScript declarative language

3 code implementations17 Aug 2015 André Dietrich, Sebastian Zug, Luigi Nardi, Jörg Kaiser

SelectScript is an extendable, adaptable, and declarative domain-specific language aimed at information retrieval from simulation environments and robotic world models in an SQL-like manner.

Information Retrieval Retrieval

Introducing SLAMBench, a performance and accuracy benchmarking methodology for SLAM

3 code implementations8 Oct 2014 Luigi Nardi, Bruno Bodin, M. Zeeshan Zia, John Mawer, Andy Nisbet, Paul H. J. Kelly, Andrew J. Davison, Mikel Luján, Michael F. P. O'Boyle, Graham Riley, Nigel Topham, Steve Furber

Real-time dense computer vision and SLAM offer great potential for a new level of scene modelling, tracking and real environmental interaction for many types of robot, but their high computational requirements mean that use on mass market embedded platforms is challenging.

Benchmarking

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