| Presentation | 2017-11-17 Three-dimensional underground imaging Yudai Kikuyama, Ryo Toh, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | When image the underground objects, the reflected waves from underground objects are interfered with Rayleigh wave, and this influence may cause a significant reduction in image quality. In this research, we study the method to reduce the Rayleigh wave component. First, Rayleigh wave components are mathematically modeled, and parameters of the mathematical model are estimated by the least-square numerical analysis method, comparing with the part of Rayleigh wave component before the underground reflected waves in the measured received signals. As the least-square method, the Gauss-Newton method and the Levenberg-Marquardt method were compared and discussed. In addition, the initial value setting method considering the characteristics of Rayleigh wave used in this work was studied. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Underground imaging / Rayleigh wave / Levenberg-Marquardt method / Initial value |
| Paper # | US2017-71 |
| Date of Issue | 2017-11-10 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2017/11/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Honda Electronics Co. Ltd. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) |
| Vice Chair | Nobuyuki Endoh(Kanagawa Univ.) / Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Secretary | Nobuyuki Endoh(Univ. of Toyama) / Shinichi Takeuchi(Univ. of Tokyo) |
| Assistant | Takenobu Tsuchiya(Kanagawa Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Three-dimensional underground imaging |
| Sub Title (in English) | Study on surface wave reduction method using LM algorithm |
| Keyword(1) | Underground imaging |
| Keyword(2) | Rayleigh wave |
| Keyword(3) | Levenberg-Marquardt method |
| Keyword(4) | Initial value |
| 1st Author's Name | Yudai Kikuyama |
| 1st Author's Affiliation | Chiba Institute Of Technology(Chiba Inst. Tech.) |
| 2nd Author's Name | Ryo Toh |
| 2nd Author's Affiliation | Chiba Institute Of Technology(Chiba Inst. Tech.) |
| Date | 2017-11-17 |
| Paper # | US2017-71 |
| Volume (vol) | vol.117 |
| Number (no) | US-311 |
| Page | pp.pp.37-39(US), |
| #Pages | 3 |
| Date of Issue | 2017-11-10 (US) |