Search Results for author: Ryota Kawasumi

Found 3 papers, 0 papers with code

Automatic Hyperparameter Tuning in Sparse Matrix Factorization

no code implementations17 May 2023 Ryota Kawasumi, Koujin Takeda

We study the problem of hyperparameter tuning in sparse matrix factorization under Bayesian framework.

Pointwise convergence of Fourier series and deep neural network for the indicator function of d-dimensional ball

no code implementations17 Apr 2023 Ryota Kawasumi, Tsuyoshi Yoneda

In this paper, we clarify the crucial difference between a deep neural network and the Fourier series.

Approximate Method of Variational Bayesian Matrix Factorization/Completion with Sparse Prior

no code implementations14 Mar 2018 Ryota Kawasumi, Koujin Takeda

We derive analytical expression of matrix factorization/completion solution by variational Bayes method, under the assumption that observed matrix is originally the product of low-rank dense and sparse matrices with additive noise.

Matrix Completion

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