Skip to main content

and
  1. No Access

    Article

    Moreau-Yoshida variational transport: a general framework for solving regularized distributional optimization problems

    We address a general optimization problem involving the minimization of a composite objective functional defined over a class of probability distributions. The objective function consists of two components: on...

    Dai Hai Nguyen, Tetsuya Sakurai in Machine Learning (2024)

  2. Article

    Mirror variational transport: a particle-based algorithm for distributional optimization on constrained domains

    We consider the optimization problem of minimizing an objective functional, which admits a variational form and is defined over probability distributions on a constrained domain, which poses challenges to both th...

    Dai Hai Nguyen, Tetsuya Sakurai in Machine Learning (2023)

  3. No Access

    Chapter and Conference Paper

    Image Data Recoverability Against Data Collaboration and Its Countermeasure

    The development machine learning and related techniques has accelerated the use of data in a variety of fields, including medicine, finance, and advertising. Because the amount of data is increasing extremely ...

    Takaya Yamazoe, Hiromi Yamashiro in Science of Cyber Security - SciSec 2022 Wo… (2022)

  4. No Access

    Chapter and Conference Paper

    Accelerating the Backpropagation Algorithm by Using NMF-Based Method on Deep Neural Networks

    Backpropagation (BP) is the most widely used algorithm for the training of deep neural networks (DNN) and is also considered a de facto standard algorithm. However, the BP algorithm often requires a lot of com...

    Suhyeon Baek, Akira Imakura, Tetsuya Sakurai in Knowledge Management and Acquisition for I… (2021)

  5. No Access

    Chapter and Conference Paper

    Collaborative Data Analysis: Non-model Sharing-Type Machine Learning for Distributed Data

    This paper proposes a novel non-model sharing-type collaborative learning method for distributed data analysis, in which data are partitioned in both samples and features. Analyzing these types of distributed ...

    Akira Imakura, **ucai Ye, Tetsuya Sakurai in Knowledge Management and Acquisition for I… (2021)

  6. No Access

    Chapter and Conference Paper

    Parameter Evolution Self-Adaptive Strategy and Its Application for Cuckoo Search

    Cuckoo Search (CS) is a simple yet efficient swarm intelligence algorithm based on Lévy Flight. However, its performance can depend heavily on the parameter settings. Though many studies have designed control ...

    Yifan He, Claus Aranha, Tetsuya Sakurai in Bioinspired Optimization Methods and Their… (2020)

  7. No Access

    Article

    Parallel Implementation of the Nonlinear Semi-NMF Based Alternating Optimization Method for Deep Neural Networks

    For computing weights of deep neural networks (DNNs), the backpropagation (BP) method has been widely used as a de-facto standard algorithm. Since the BP method is based on a stochastic gradient descent method...

    Akira Imakura, Yuto Inoue, Tetsuya Sakurai, Yasunori Futamura in Neural Processing Letters (2018)

  8. No Access

    Chapter and Conference Paper

    Structure-Preserving Technique in the Block SS–Hankel Method for Solving Hermitian Generalized Eigenvalue Problems

    The block SS–Hankel method is one of the most efficient methods for solving interior generalized eigenvalue problems (GEPs) when only the eigenvalues are required. However, even if the target GEP is Hermitian,...

    Akira Imakura, Yasunori Futamura in Parallel Processing and Applied Mathematics (2018)

  9. No Access

    Chapter and Conference Paper

    Alternating Optimization Method Based on Nonnegative Matrix Factorizations for Deep Neural Networks

    The backpropagation algorithm for calculating gradients has been widely used in computation of weights for deep neural networks (DNNs). This method requires derivatives of objective functions and has some diff...

    Tetsuya Sakurai, Akira Imakura, Yuto Inoue in Neural Information Processing (2016)