Search Results for author: Keisuke Yamazaki

Found 9 papers, 0 papers with code

Model Bridging: Connection between Simulation Model and Neural Network

no code implementations22 Jun 2019 Keiichi Kisamori, Keisuke Yamazaki, Yuto Komori, Hiroshi Tokieda

One approach is replacing the un-interpretable machine learning model with a surrogate model, which has a simple structure for interpretation.

BIG-bench Machine Learning Decision Making +1

Simulator Calibration under Covariate Shift with Kernels

no code implementations21 Sep 2018 Keiichi Kisamori, Motonobu Kanagawa, Keisuke Yamazaki

We propose a novel calibration method for computer simulators, dealing with the problem of covariate shift.

Bayesian Inference

Kernel Recursive ABC: Point Estimation with Intractable Likelihood

no code implementations ICML 2018 Takafumi Kajihara, Motonobu Kanagawa, Keisuke Yamazaki, Kenji Fukumizu

We propose a novel approach to parameter estimation for simulator-based statistical models with intractable likelihood.

Effects of Additional Data on Bayesian Clustering

no code implementations13 Jul 2016 Keisuke Yamazaki

The present paper presents a theoretical analysis of the accuracy of such a model and clarifies which factor has the greatest effect on its accuracy, the advantages of obtaining additional data, and the disadvantages of increasing the complexity.

Clustering Transfer Learning

Bayesian Estimation of Multidimensional Latent Variables and Its Asymptotic Accuracy

no code implementations5 Oct 2015 Keisuke Yamazaki

A previous study proposed a method that can be used when the range of the latent variable is redundant compared with the model generating data.

Clustering

Asymptotic Accuracy of Bayesian Estimation for a Single Latent Variable

no code implementations25 Aug 2014 Keisuke Yamazaki

In a previous study, we determined the accuracy of a Bayes estimation for the joint probability of the latent variables in a dataset, and we proved that the Bayes method is asymptotically more accurate than the maximum-likelihood method.

Accuracy of Latent-Variable Estimation in Bayesian Semi-Supervised Learning

no code implementations9 Aug 2013 Keisuke Yamazaki

Unsupervised learning tasks, such as cluster analysis, are regarded as estimations of latent variables based on the observable ones.

Asymptotic Accuracy of Bayes Estimation for Latent Variables with Redundancy

no code implementations15 May 2012 Keisuke Yamazaki

In the singular case, on the other hand, the models are not identifiable and the Fisher matrix is not positive definite.

Clustering

Asymptotic Accuracy of Distribution-Based Estimation for Latent Variables

no code implementations10 Apr 2012 Keisuke Yamazaki

Hierarchical statistical models are widely employed in information science and data engineering.

Active Learning Model Selection

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