19 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
12 papers
Performance evaluation of accelerated complex multiple-precision LU decomposition
Tomonori Kouya
The direct method is one of the most important algorithms for solving linear systems of equations, with LU decomposition comprising a significant portion of its computation time. T…
Evaluation of POSIT Arithmetic with Accelerators
Naohito Nakasato, Yuki Murakami, Fumiya Kono +1
We present an evaluation of 32-bit POSIT arithmetic through its implementation as accelerators on FPGAs and GPUs. POSIT, a floating-point number format, adaptively changes the size…
Acceleration of multiple precision solver for ill-conditioned algebraic equations with lower precision eigensolver
Tomonori Kouya
There are some types of ill-conditioned algebraic equations that have difficulty in obtaining accurate roots and coefficients that must be expressed with a multiple precision float…
Acceleration of multiple precision matrix multiplication based on multi-component floating-point arithmetic using AVX2
Tomonori Kouya
In this paper, we report the results obtained from the acceleration of multi-binary64-type multiple precision matrix multiplication with AVX2. We target double-double (DD), triple-…
Performance Evaluation of an Extrapolation Method for Ordinary Differential Equations with Error-free Transformation
Tomonori Kouya
The application of error-free transformation (EFT) is recently being developed to solve ill-conditioned problems. It can reduce the number of arithmetic operations required, compar…
Performance evaluation of multiple precision matrix multiplications using parallelized Strassen and Winograd algorithms
Tomonori Kouya
It is well known that Strassen and Winograd algorithms can reduce the computational costs associated with dense matrix multiplication. We have already shown that they are also very…
Multimodal Hierarchical Dirichlet Process-based Active Perception
Tadahiro Taniguchi, Toshiaki Takano, Ryo Yoshino
In this paper, we propose an active perception method for recognizing object categories based on the multimodal hierarchical Dirichlet process (MHDP). The MHDP enables a robot to f…
Accelerated Multiple Precision Matrix Multiplication using Strassen's Algorithm and Winograd's Variant
Tomonori Kouya
The Strassen algorithm and Winograd's variant accelerate matrix multiplication by using fewer arithmetic operations than standard matrix multiplication. Although many papers have b…
Practical Implementation of High-Order Multiple Precision Fully Implicit Runge-Kutta Methods with Step Size Control Using Embedded Formula
Tomonori Kouya
We propose a practical implementation of high-order fully implicit Runge-Kutta(IRK) methods in a multiple precision floating-point environment. Although implementations based on IR…
Evaluation of specific heat for superfluid helium between 0 - 2.1 K based on nonlinear theory
Shosuke Sasaki
The specific heat of liquid helium was calculated theoretically in the Landau theory. The results deviate from experimental data in the temperature region of 1.3 - 2.1 K. Many theo…
Frequency Dependence of Diagonal Resistance in Fractional Quantum Hall Effect via Periodic Modulation of Magnetic Field
Shosuke Sasaki
Energy spectrum of fractional quantum Hall (FQH) states is composed of single electron energy (Landau energy) neglecting the Coulomb interactions between electrons, classical Coulo…
Energy Spectra for Fractional Quantum Hall States
Shosuke Sasaki
Fractional quantum Hall states (FQHS) with the filling factor nu = p/q of q < 21 are examined and their energies are calculated. The classical Coulomb energy is evaluated among man…