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Journal Articles

Estimation of planes of a rock mass in a gallery wall from point cloud data based on MD PSO

Matsuura, Yuto*; Hayano, Akira; Itakura, Kenichi*; Suzuki, Yukinori*

Applied Soft Computing, 84, p.105737_1 - 105737_9, 2019/11

https://doi.org/10.1016/j.asoc.2019.105737
 Times Cited Count：2 Percentile：14.62(Computer Science, Artificial Intelligence)

LiDAR (laser imaging detection and ranging) has been developed to obtain a high-resolution point cloud data indicating the detailed 3D shapes of an object. To identify discontinuities in a rock mass of a tunnel gallery wall, it is necessary to approximate the rock mass surface with small planes. Normal vectors of the planes are important to identify discontinuities. We developed an algorithm for estimation of planes based on multi-dimensional particle swarm optimization (MD PSO) from point cloud data. Point cloud data were segmented into bounding boxes and grouped into clusters by MD PSO. Planes were estimated using the least squares method for point cloud data in the respective clusters. The newly developed MD PSO algorithm was evaluated using point cloud data obtained from a gallery wall. Evaluation was carried out in comparison with the previous developed variable-box segmentation (VBS) algorithm. The MD PSO-based algorithm showed a 7% higher accuracy than that of the VBS algorithm.

JAEA Reports

Multi-dimensional numerical analyses for the IFMIF target jet flows

*; ; Nakamura, Hideo

JAERI-Research 98-022, 46 Pages, 1998/03

JAERI-Research-98-022.pdf:1.92MB

no abstracts in English

Journal Articles

Experimental and analytical studies on high-speed plane jet along concave wall simulating IFMIF Li target flow

Nakamura, Hideo; Ito, Kazuhiro*; Kukita, Yutaka*; *; ; Maekawa, Hiroshi; Katsuta, Hiroji

Journal of Nuclear Materials, 258-263, p.440 - 445, 1998/00

https://doi.org/10.1016/S0022-3115(98)00235-9
 Times Cited Count：7 Percentile：53.73(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Large-scale multi-dimensional phenomena found in CCTF and SCTF experiments

Murao, Yoshio; Iguchi, Tadashi; ; Iwamura, Takamichi

Nucl. Eng. Des., 145, p.85 - 95, 1993/00

https://doi.org/10.1016/0029-5493(93)90060-M
 Times Cited Count：4 Percentile：44.86(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Loss of Residual Heat Removal(RHR) event during PWR mid-loop operation; ROSA-IV/LSTF experiment without opening on primary loop pressure boundary

Nakamura, Hideo; Katayama, Jiro; Kukita, Yutaka

Power Plant Transients,1992; FED-Vol. 140, p.9 - 16, 1993/00

no abstracts in English

Journal Articles

Importantness of three-dimensional thermal-hydraulic codes for advanced light water reactors with unknown characteristics

Murao, Yoshio; Araya, Fumimasa; Iwamura, Takamichi; ; ; Iguchi, Tadashi

Proc. of the Int. Conf. on Design and Safety of Advanced Nuclear Power Plants,Vol. 3, p.24.1_1 - 24.1_10, 1992/00

no abstracts in English

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