| Project/Area Number |
08045039
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | University-to-University Cooperative Research |
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| Research Field |
計測・制御工学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
TATEIBA Mitsuo Kyushu University, Graduate School of Information Science and Electrical Engineering, Professor., 大学院・システム情報科学研究科, 教授 (40037924)
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| Co-Investigator(Kenkyū-buntansha) |
KUGA Yasuo University of Washington, Dept.of Electrical Engineering, Professor, 工学部, 教授
TSANG Leung University of Washington, Dept.of Electrical Engineering, Professor, 工学部, 教授
ISHIMARU Akira University of Washington, Dept.of Electrical Engineering, Professor, 工学部, 教授
FUJISAKI Kiyotaka Kyushu University, Graduate School of Information Science and Electrical Enginee, 大学院・システム情報科学研究科, 助手 (20253487)
REN Wei Kyushu University, Graduate School of Information Science and Electrical Enginee, 大学院・システム情報科学研究科, 講師 (00284547)
KUGA Ysuo ワシントン大学, 工学部, 教授
吉富 邦明 九州大学, 大学院・システム情報科学研究科, 助教授 (30150501)
LEUNG Tsang ワシントン大学, 工学部, 教授
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| Project Period (FY) |
1996 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | random medium / multiple scattering / effective dielectric constant / coherence attenuation / angular memory effect / angular correlation / radar cross-section / scattering problem |
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| Research Abstract |
We pursued the following two subjects as described in the application form.
The first subject is evaluation of scattering cross-sections of random media containing many dielectric particles and of reduction of target detection resolution due to random media. The Kyushu University(KU) group renewed a radiative transfer equation by using a method of evaluating the effective dielectric constants of random media, method which is based on a multiple scattering theory developed by the KU group. The renewal is based on derivation process of the University of Washington(UW) group in a dense random medium. The numerical analysis of the radiative transfer equation makes clear the characteristics of average polarization degree of scattered waves and shows that the evaluation of scattering cross-sections of random media depends largely on methods for evaluating the effective dielectric constants of random media. The subject on reduction of target detection resolution is intensively studied by the UW roup by using computer simulation and controlled experiment. The research results are reported in journals and proceedings of international symposia.
The second subject is to present imaging methods based on the results of the first subject and to evaluate the validity of the methods. The KU group tried to develop a space fi1tering technique in order to recover the loss of phase information and the UW group tried to develop a technique using pulse scattering and space or angle correlation.
Their research results will be reported in journals and proceedings of international symposia. Both groups point out that the combination of each technique plays an important role in imaging in biological-environmental random media.
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