no code implementations • 6 May 2024 • Guy Zepko, Ofer M. Shir
Mixed-integer (MI) quadratic models subject to quadratic constraints, known as All-Quadratic MI Programs, constitute a challenging class of NP-complete optimization problems.
no code implementations • 2 May 2024 • Jacob de Nobel, Diederick Vermetten, Anna V. Kononova, Ofer M. Shir, Thomas Bäck
Na\"ive restarts of global optimization solvers when operating on multimodal search landscapes may resemble the Coupon's Collector Problem, with a potential to waste significant function evaluations budget on revisiting the same basins of attractions.
no code implementations • 1 Mar 2023 • Martin Feder, Michal Horovitz, Assaf Chen, Raphael Linker, Ofer M. Shir
We describe the lessons learned from targeting agricultural detection problem-solving, when subject to low resolution input maps, by means of Machine Learning-based super-resolution approaches.
no code implementations • 30 Oct 2022 • Veysel Kocaman, Ofer M. Shir, Thomas Bäck, Ahmed Nabil Belbachir
We propose an augmentation policy for Contrastive Self-Supervised Learning (SSL) in the form of an already established Salient Image Segmentation technique entitled Global Contrast based Salient Region Detection.
no code implementations • 27 Jun 2022 • Boris Yazmir, Ofer M. Shir
Knowledge of search-landscape features of BlackBox Optimization (BBO) problems offers valuable information in light of the Algorithm Selection and/or Configuration problems.
no code implementations • 18 Sep 2021 • Veysel Kocaman, Ofer M. Shir, Thomas Baeck
Early-stage disease indications are rarely recorded in real-world domains, such as Agriculture and Healthcare, and yet, their accurate identification is critical in that point of time.
no code implementations • 21 May 2021 • Anna V. Kononova, Ofer M. Shir, Teus Tukker, Pierluigi Frisco, Shutong Zeng, Thomas Bäck
Optimal Lens Design constitutes a fundamental, long-standing real-world optimization challenge.
no code implementations • 12 Nov 2020 • Veysel Kocaman, Ofer M. Shir, Thomas Bäck
We empirically observe that the initial F1 test score jumps from 0. 29 to 0. 95 for the minority class upon adding a final Batch Normalization (BN) layer just before the output layer in VGG19.
no code implementations • 4 Oct 2020 • Ofer M. Shir, Xi Xing, Herschel Rabitz
Such problems arise in engineering and scientific applications, which possess a multi-resolution control nature, and thus may be formulated either by means of low-resolution variants (providing coarser approximations with presumably lower accuracy for the general problem) or by high-resolution controls.
no code implementations • 19 Dec 2019 • Carola Doerr, Furong Ye, Naama Horesh, Hao Wang, Ofer M. Shir, Thomas Bäck
Automated benchmarking environments aim to support researchers in understanding how different algorithms perform on different types of optimization problems.
1 code implementation • 10 Jun 2018 • Ofer M. Shir, Amir Yehudayoff
We consider Evolution Strategies operating only with isotropic Gaussian mutations on positive quadratic objective functions, and investigate the covariance matrix when constructed out of selected individuals by truncation.
no code implementations • 1 Jul 2017 • 01 July 2017Sandeep V. Belure, Ofer M. Shir, Vikas Nanda
We formulate a bi-objective combinatorial minimization problem that targets both stability and specificity of the 4-level heterotrimer.
no code implementations • 23 Jun 2016 • Ofer M. Shir, Jonathan Roslund, Amir Yehudayoff
We study the theoretical capacity to statistically learn local landscape information by Evolution Strategies (ESs).