no code implementations • 16 Feb 2024 • Yasuo Sasaki, Keigo Yamada, Takayuki Nagata, Yuji Saito, Taku Nonomura
Sensor selection which prevents the overfitting of the resulting estimator can be realized by setting a positive regularization parameter.
no code implementations • 14 Jul 2022 • Naoki Kanda, Chihaya Abe, Shintaro Goto, Keigo Yamada, Kumi Nakai, Yuji Saito, Keisuke Asai, Taku Nonomura
In the wind tunnel test, the PIV measurement and real-time measurement using SPPIV were conducted for the flow velocity field around the NACA0015 airfoil model.
no code implementations • 9 Jun 2022 • Kumi Nakai, Takayuki Nagata, Keigo Yamada, Yuji Saito, Taku Nonomura, Masayuki Kano, Shin-ichi Ito, Hiromichi Nagao
The seismic wavefield is reconstructed by the numerical simulation using the parameters estimated based on the observed signals at only observation sites selected by the proposed method.
no code implementations • 12 May 2022 • Takayuki Nagata, Keigo Yamada, Taku Nonomura, Kumi Nakai, Yuji Saito, Shunsuke Ono
The proposed method can avoid the difficulty of sensor selection with strongly correlated measurement noise, in which the possible sensor locations must be known in advance for calculating the precision matrix for selecting sensor locations.
no code implementations • 9 May 2022 • Takayuki Nagata, Keigo Yamada, Kumi Nakai, Yuji Saito, Taku Nonomura
In the customized method, a part of the compressed sensor candidates is selected using the common greedy method or other low-cost methods.
no code implementations • 27 Apr 2022 • Kumi Nakai, Yasuo Sasaki, Takayuki Nagata, Keigo Yamada, Yuji Saito, Taku Nonomura
Specifically, a new index is iteratively added to the nondominated solutions of sets, and the multi-objective functions are evaluated for new sets.
no code implementations • 27 Apr 2021 • Keigo Yamada, Yuji Saito, Taku Nonomura, Keisuke Asai
A noise model is given using truncated modes in reduced-order modeling, and sensor positions that are optimal for generalized least squares estimation are selected.
1 code implementation • 10 Jul 2020 • Kumi Nakai, Keigo Yamada, Takayuki Nagata, Yuji Saito, Taku Nonomura
The objective functions based on various criteria of optimal design are adopted to the greedy method: D-optimality, A-optimality, and E-optimality, which maximizes the determinant, minimize the trace of inverse, and maximize the minimum eigenvalue of the Fisher information matrix, respectively.
2 code implementations • 20 Nov 2019 • Yuji Saito, Taku Nonomura, Keigo Yamada, Kumi Nakai, Takayuki Nagata, Keisuke Asai, Yasuo Sasaki, Daisuke Tsubakino
The maximization of the determinant of the matrix which appears in pseudo-inverse matrix operations is employed as an objective function of the problem in the present extended approach.
no code implementations • 30 May 2019 • Yuji Saito, Taku Nonomura, Koki Nankai, Keigo Yamada, Keisuke Asai, Yasuo Sasaki, Daisuke Tsubakino
A vector-measurement-sensor problem for the least squares estimation is considered, by extending a previous novel approach in this paper.