Search Results for author: Jun-Ichiro Hirayama

Found 7 papers, 3 papers with code

SPD domain-specific batch normalization to crack interpretable unsupervised domain adaptation in EEG

1 code implementation2 Jun 2022 Reinmar J Kobler, Jun-Ichiro Hirayama, Qibin Zhao, Motoaki Kawanabe

To achieve this, we propose a new building block for geometric deep learning, which we denote SPD domain-specific momentum batch normalization (SPDDSMBN).

Brain Computer Interface EEG +2

On the interpretation of linear Riemannian tangent space model parameters in M/EEG

1 code implementation30 Jul 2021 Reinmar J. Kobler, Jun-Ichiro Hirayama, Lea Hehenberger Catarina Lopes-Dias, Gernot R. Müller-Putz, Motoaki Kawanabe

Riemannian tangent space methods offer state-of-the-art performance in magnetoencephalography (MEG) and electroencephalography (EEG) based applications such as brain-computer interfaces and biomarker development.

EEG

Neural dSCA: demixing multimodal interaction among brain areas during naturalistic experiments

no code implementations5 Jun 2021 Yu Takagi, Laurence T. Hunt, Ryu Ohata, Hiroshi Imamizu, Jun-Ichiro Hirayama

In this paper, we develop a new method for cross-areal interaction analysis that uses the rich task or stimulus parameters to reveal how and what types of information are shared by different neural populations.

Dimensionality Reduction Experimental Design

Demixed shared component analysis of neural population data from multiple brain areas

1 code implementation NeurIPS 2020 Yu Takagi, Steven W. Kennerley, Jun-Ichiro Hirayama, Laurence T. Hunt

This yields interpretable components that express which variables are shared between different brain regions and when this information is shared across time.

Neurons and Cognition

SPLICE: Fully Tractable Hierarchical Extension of ICA with Pooling

no code implementations ICML 2017 Jun-Ichiro Hirayama, Aapo Hyvärinen, Motoaki Kawanabe

We present a novel probabilistic framework for a hierarchical extension of independent component analysis (ICA), with a particular motivation in neuroscientific data analysis and modeling.

EEG

Bregman divergence as general framework to estimate unnormalized statistical models

no code implementations14 Feb 2012 Michael Gutmann, Jun-Ichiro Hirayama

We show that the Bregman divergence provides a rich framework to estimate unnormalized statistical models for continuous or discrete random variables, that is, models which do not integrate or sum to one, respectively.

Structural equations and divisive normalization for energy-dependent component analysis

no code implementations NeurIPS 2011 Jun-Ichiro Hirayama, Aapo Hyvärinen

Here, we propose a principled probabilistic model to model the energy- correlations between the latent variables.

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