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  1. Article

    Open Access

    Estimation with infinite-dimensional exponential family and Fisher divergence

    Infinite dimensional exponential families have been theoretically studied, but their practical applications are still limited because empirical estimation is not straightforward. This paper first gives a brief...

    Kenji Fukumizu in Information Geometry (2024)

  2. No Access

    Chapter and Conference Paper

    A Scaling Law for Syn2real Transfer: How Much Is Your Pre-training Effective?

    Synthetic-to-real transfer learning is a framework in which a synthetically generated dataset is used to pre-train a model to improve its performance on real vision tasks. The most significant advantage of usi...

    Hiroaki Mikami, Kenji Fukumizu, Shogo Murai in Machine Learning and Knowledge Discovery i… (2023)

  3. Article

    Open Access

    Model-based kernel sum rule: kernel Bayesian inference with probabilistic models

    Kernel Bayesian inference is a principled approach to nonparametric inference in probabilistic graphical models, where probabilistic relationships between variables are learned from data in a nonparametric man...

    Yu Nishiyama, Motonobu Kanagawa, Arthur Gretton, Kenji Fukumizu in Machine Learning (2020)

  4. Article

    Open Access

    Robust Bayesian model selection for variable clustering with the Gaussian graphical model

    Variable clustering is important for explanatory analysis. However, only few dedicated methods for variable clustering with the Gaussian graphical model have been proposed. Even more severe, small insignifican...

    Daniel Andrade, Akiko Takeda, Kenji Fukumizu in Statistics and Computing (2020)

  5. Article

    Open Access

    Convergence Analysis of Deterministic Kernel-Based Quadrature Rules in Misspecified Settings

    This paper presents convergence analysis of kernel-based quadrature rules in misspecified settings, focusing on deterministic quadrature in Sobolev spaces. In particular, we deal with misspecified settings whe...

    Motonobu Kanagawa, Bharath K. Sriperumbudur in Foundations of Computational Mathematics (2020)

  6. No Access

    Chapter and Conference Paper

    Exchangeable Deep Neural Networks for Set-to-Set Matching and Learning

    Matching two different sets of items, called heterogeneous set-to-set matching problem, has recently received attention as a promising problem. The difficulties are to extract features to match a correct pair ...

    Yuki Saito, Takuma Nakamura, Hirotaka Hachiya in Computer Vision – ECCV 2020 (2020)

  7. No Access

    Article

    Multilocus phylogenetic analysis with gene tree clustering

    Both theoretical and empirical evidence point to the fact that phylogenetic trees of different genes (loci) do not display precisely matched topologies. Nonetheless, most genes do display related phylogenies; ...

    Ruriko Yoshida, Kenji Fukumizu, Chrysafis Vogiatzis in Annals of Operations Research (2019)

  8. No Access

    Chapter and Conference Paper

    From Black-Box to White-Box: Interpretable Learning with Kernel Machines

    We present a novel approach to interpretable learning with kernel machines. In many real-world learning tasks, kernel machines have been successfully applied. However, a common perception is that they are diff...

    Hao Zhang, Shinji Nakadai, Kenji Fukumizu in Machine Learning and Data Mining in Patter… (2018)

  9. No Access

    Article

    Unsupervised group matching with application to cross-lingual topic matching without alignment information

    We propose a method for unsupervised group matching, which is the task of finding correspondence between groups across different domains without cross-domain similarity measurements or paired data. For example...

    Tomoharu Iwata, Motonobu Kanagawa, Tsutomu Hirao in Data Mining and Knowledge Discovery (2017)

  10. Article

    Open Access

    Learning sparse structural changes in high-dimensional Markov networks

    Recent years have seen an increasing popularity of learning the sparse changes in Markov Networks. Changes in the structure of Markov Networks reflect alternations of interactions between random variables under ...

    Song Liu, Kenji Fukumizu, Taiji Suzuki in Behaviormetrika (2017)

  11. Article

    Open Access

    Computing functions of random variables via reproducing kernel Hilbert space representations

    We describe a method to perform functional operations on probability distributions of random variables. The method uses reproducing kernel Hilbert space representations of probability distributions, and it is ...

    Bernhard Schölkopf, Krikamol Muandet, Kenji Fukumizu in Statistics and Computing (2015)

  12. No Access

    Chapter and Conference Paper

    Reducing Hubness for Kernel Regression

    In this paper, we point out that hubness—some samples in a high-dimensional dataset emerge as hubs that are similar to many other samples—influences the performance of kernel regression. Because the dimension of ...

    Kazuo Hara, Ikumi Suzuki, Kei Kobayashi in Similarity Search and Applications (2015)

  13. No Access

    Chapter

    Nonparametric Bayesian Inference with Kernel Mean Embedding

    Kernel methods have been successfully used in many machine learning problems with favorable performance in extracting nonlinear structure of high-dimensional data. Recently, nonparametric inference methods wit...

    Kenji Fukumizu in Modern Methodology and Applications in Spatial-Temporal Modeling (2015)

  14. No Access

    Article

    Parameter estimation for von Mises–Fisher distributions

    When analyzing high-dimensional data, it is often appropriate to pay attention only to the direction of each datum, disregarding its norm. The von Mises–Fisher (vMF) distribution is a natural probability distr...

    Akihiro Tanabe, Kenji Fukumizu, Shigeyuki Oba in Computational Statistics (2007)

  15. No Access

    Article

    Preface

    Kenji Fukumizu, Yukito Iba, Takashi Tsuchiya in Annals of the Institute of Statistical Mat… (2003)

  16. No Access

    Chapter and Conference Paper

    An Efficient Learning Algorithm Using Natural Gradient and Second Order Information of Error Surface

    Natural gradient learning algorithm, which originated from information geometry, is known to provide a good solution for the problem of slow learning speed of gradient descent learning methods. Whereas the nat...

    Hyeyoung Park, Kenji Fukumizu in PRICAI 2000 Topics in Artificial Intellige… (2000)

  17. No Access

    Chapter and Conference Paper

    Generalization Error of Linear Neural Networks in Unidentifiable Cases

    The statistical asymptotic theory is often used in theoretical results in computational and statistical learning theory. It describes the limiting distribution of the maximum likelihood estimator (MLE) as an n...

    Kenji Fukumizu in Algorithmic Learning Theory (1999)

  18. No Access

    Chapter and Conference Paper

    Dynamics of Batch Learning in Multilayer Neural Networks

    We discuss the dynamics of batch learning of multilayer neural networks in the asymptotic limit, where the number of trining data is much larger than the number of parameters, emphasizing on the parameterizati...

    Kenji Fukumizu in ICANN 98 (1998)