Search Results for author: Ruriko Yoshida

Found 10 papers, 4 papers with code

Tropical Decision Boundaries for Neural Networks Are Robust Against Adversarial Attacks

no code implementations1 Feb 2024 Kurt Pasque, Christopher Teska, Ruriko Yoshida, Keiji Miura, Jefferson Huang

We introduce a simple, easy to implement, and computationally efficient tropical convolutional neural network architecture that is robust against adversarial attacks.

Tropical Geometric Tools for Machine Learning: the TML package

1 code implementation3 Sep 2023 David Barnhill, Ruriko Yoshida, Georgios Aliatimis, Keiji Miura

In the last decade, developments in tropical geometry have provided a number of uses directly applicable to problems in statistical learning.

Density Estimation

Imputing phylogenetic trees using tropical polytopes over the space of phylogenetic trees

no code implementations30 Jun 2023 Ruriko Yoshida

When we apply comparative phylogenetic analyses to genome data, it is a well-known problem and challenge that some of given species (or taxa) often have missing genes.

Tropical Density Estimation of Phylogenetic Trees

no code implementations9 Jun 2022 Ruriko Yoshida, David Barnhill, Keiji Miura, Daniel Howe

In order to discover ``outlying'' gene trees which do not follow the ``main distribution(s)'' of trees, we propose to apply the ``tropical metric'' with the max-plus algebra from tropical geometry to a non-parametric estimation of gene trees over the space of phylogenetic trees.

Density Estimation

Solving reward-collecting problems with UAVs: a comparison of online optimization and Q-learning

1 code implementation30 Nov 2021 Yixuan Liu, Chrysafis Vogiatzis, Ruriko Yoshida, Erich Morman

Uncrewed autonomous vehicles (UAVs) have made significant contributions to reconnaissance and surveillance missions in past US military campaigns.

Autonomous Vehicles Q-Learning

SARS-CoV-2 Dissemination using a Network of the United States Counties

no code implementations26 Nov 2021 Patrick Urrutia, David Wren, Chrysafis Vogiatzis, Ruriko Yoshida

County officials can provide targeted information, preparedness training, as well as increase testing in these areas.

Time Series Time Series Analysis

Tropical Support Vector Machines: Evaluations and Extension to Function Spaces

no code implementations27 Jan 2021 Ruriko Yoshida, Misaki Takamori, Hideyuki Matsumoto, Keiji Miura

Similar to SVMs, tropical SVMs classify data points using a tropical hyperplane under the tropical metric with the max-plus algebra.

Tropical Data Science

no code implementations13 May 2020 Ruriko Yoshida

Phylogenomics is a new field which applies to tools in phylogenetics to genome data.

BIG-bench Machine Learning

Tropical Support Vector Machine and its Applications to Phylogenomics

2 code implementations2 Mar 2020 Xiaoxian Tang, Houjie Wang, Ruriko Yoshida

For hard margin tropical SVMs, we prove the necessary and sufficient conditions for two categories of data points to be separated, and we show an explicit formula for the optimal value of the feasible linear programming problem.

Tropical Principal Component Analysis and its Application to Phylogenetics

1 code implementation7 Oct 2017 Ruriko Yoshida, Leon Zhang, Xu Zhang

Principal component analysis is a widely-used method for the dimensionality reduction of a given data set in a high-dimensional Euclidean space.

Combinatorics Populations and Evolution

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