Search Results for author: Hiroaki Shiino

Found 2 papers, 1 papers with code

Whitening-Free Least-Squares Non-Gaussian Component Analysis

1 code implementation3 Mar 2016 Hiroaki Shiino, Hiroaki Sasaki, Gang Niu, Masashi Sugiyama

Non-Gaussian component analysis (NGCA) is an unsupervised linear dimension reduction method that extracts low-dimensional non-Gaussian "signals" from high-dimensional data contaminated with Gaussian noise.

Dimensionality Reduction

Exploration of Unranked Items in Safe Online Learning to Re-Rank

no code implementations2 May 2023 Hiroaki Shiino, Kaito Ariu, Kenshi Abe, Togashi Riku

In this paper, we propose a safe OLTR algorithm that efficiently exchanges one of the items in the current ranking with an item outside the ranking (i. e., an unranked item) to perform exploration.

Learning-To-Rank Safe Exploration

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