46 citations · 92 across the 7 of their papers we have counts for
7 papers
Observation Site Selection for Physical Model Parameter Estimation toward Process-Driven Seismic Wavefield Reconstruction
Kumi Nakai, Takayuki Nagata, Keigo Yamada +5
The ``big'' seismic data not only acquired by seismometers but also acquired by vibrometers installed in buildings and infrastructure and accelerometers installed in smartphones wi…
Adjoint-based uncertainty quantification for inhomogeneous friction on a slow-slipping fault
Shin-ichi Ito, Masayuki Kano, Hiromichi Nagao
Long-term slow-slip events (LSSEs) usually occur on the deep, shallow parts of subducting plates and have substantial relation with adjacent megathrust fault motion. Conventional t…
A Phase Prediction Method for Pattern Formation in Time-Dependent Ginzburg-Landau Dynamics for Kinetic Ising Model without a priori Assumptions on Domain Patterns
Ryoji Anzaki, Shin-ichi Ito, Hiromichi Nagao +3
We propose a phase prediction method for the pattern formation in the uniaxial two-dimensional kinetic Ising model with the dipole-dipole interactions under the time-dependent Ginz…
Forecasting temporal variation of aftershocks immediately after a main shock using Gaussian process regression
Kosuke Morikawa, Hiromichi Nagao, Shin-ichi Ito +3
Uncovering the distribution of magnitudes and arrival times of aftershocks is a key to comprehend the characteristics of the sequence of earthquakes, which enables us to predict se…
Adjoint-based exact Hessian computation
Shin-ichi Ito, Takeru Matsuda, Yuto Miyatake
We consider a scalar function depending on a numerical solution of an initial value problem, and its second-derivative (Hessian) matrix for the initial value. The need to extract t…
Data assimilation for massive autonomous systems based on second-order adjoint method
Shin-ichi Ito, Hiromichi Nagao, Akinori Yamanaka +4
Data assimilation (DA) is a fundamental computational technique that integrates numerical simulation models and observation data on the basis of Bayesian statistics. Originally dev…