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Unique identification of discontinuity, anisotropy and memory of viscoelastic media

Research Project

Project/Area Number 19K03554
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12020:Mathematical analysis-related
Research InstitutionHokkaido University

Principal Investigator

Nakamura Gen  北海道大学, 電子科学研究所, 客員研究員 (50118535)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords粘弾性方程式 / 非等方性 / 履歴 / Holmgrenの一意性定理 / 地盤解析 / バイブロサイス法 / 電気探査法 / 弾性方程式 / バイブロサイス / 逆問題 / 一意性 / 一意接続定理 / ノイマン・ディリクレ写像 / バイブロサイス地盤解析法 / 履歴型粘性 / ND- map / 断層 / 緩和テンソル / 同定の一意性 / Neumann-Dirichlet map / 弾性 / 粘性 / 粘弾性 / 非等方 / バイブロサイス地盤解析
Outline of Research at the Start

固体の微小な変形と流動は線形粘弾性方程式で記述される。固体の非破壊検査は、典型的な逆問題の一つであり、応用上極めて重要である。この逆問題の研究の為にはこの方程式に対する初期値境界値問題の適切性を出発点として、この問題のGreen関数の構成とその性質、解の台の有限伝搬性、そして一意接続定理などの解の性質等について深く研究する必要がある。本研究では非等方性と履歴を視野に入れて、固体の変形と流動に係わる逆問題研究とそれに必要な解の性質の研究を行う。特に地盤解析手法の一般的な解析手法としてよく知られる バイブロサイス反射地盤解析法の数学的正当化による地盤構造同定逆問題の一意性について研究する。

Outline of Final Research Achievements

In this study, concerning the anisotropy and memory, the following two methods, which are well known as general analysis methods for ground analysis, were analyzed mathematically. Namely
1) Holmgren's uniqueness theorem was proved for an anisotropic viscoelastic equation with a memory term necessary for the mathematical justification of the vibroseis seismic reflection exploration method.
2) Regarding the electrical geophysical prospecting method, it was shown that a piecewise homogeneous anisotropic two-dimensional ground model can be identified (same as determination) by a finite number of measurements on the ground surface.

Academic Significance and Societal Importance of the Research Achievements

非等方性或いは履歴を持つ粘弾性方程式の逆問題の数学的研究は、地盤解析法として良く知られたバイブロサイス反射地震波解析法や電気探査法に於いて重要である。しかしながら、非等方性地盤に対する数学的研究は少なく、さらに履歴を持つ非等方粘弾性方程式として表せる粘弾性地盤に対しては、非常に少ないのが現状である。本研究では、研究成果の概要で述べた様にこれらの地盤解析法の基礎となる重要な研究成果を得ることが出来た。これらの研究成果は、これらの研究領域に於ける極めて先駆的な研究成果であり、更なる研究の発展が期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (54 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (14 results) Journal Article (18 results) (of which Int'l Joint Research: 16 results,  Peer Reviewed: 18 results) Presentation (22 results) (of which Int'l Joint Research: 11 results,  Invited: 18 results)

  • [Int'l Joint Research] Rice University/George Town University(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] 浙江大学/東南大学(中国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Southeast Univ./Shanghai Univ. Finance Economics(中国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] German Weather Service/National Cheng Kung Univ.(その他の国・地域)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Rice Univ.(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Indian Inst. Tech., Jammu(インド)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Rice University(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University College London(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Southeast University/SUFE(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Indian Institute of Technology, Jammu(インド)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Rice University(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Sichuan University/Beijing Comp. Sci. Res. Center(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Southeast University(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] National Cheng Kung University(その他の国・地域)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Numerical studies of domain sampling methods for inverse boundary value problems by one measurement2023

    • Author(s)
      S. Sun, G. Nakamura, H. Wang
    • Journal Title

      Journal of Computational Physics

      Volume: 484 Pages: 112099-112099

    • DOI

      10.1016/j.jcp.2023.112099

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Perturbation of Bleustein-Gulyaev waves in piezoelectric media: Barnett and Lothe integral formalism revisited2023

    • Author(s)
      Kazumi Tanuma、Xiang Xu、Gen Nakamura
    • Journal Title

      Journal of Elasticity

      Volume: 153 Issue: 3 Pages: 423-453

    • DOI

      10.1007/s10659-023-10005-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local recovery of a piecewise constant anisotropic conductivity in EIT on domains with exposed corners2023

    • Author(s)
      M. de Hoop, T. Furuya, C-L. Lin, G. Nakamura, M.Vashisth
    • Journal Title

      Inverse Problems

      Volume: 39

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Born approximation and sequence for hyperbolic equation2021

    • Author(s)
      C-L. Lin, L. Lin, G. Nakamura
    • Journal Title

      asymptot. Anal.

      Volume: 121 Pages: 101-123

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Duality between range and no-response tests and its aplications for inverse problems2021

    • Author(s)
      Y-H. Lin, G. Nakamura, R. Potthast, H. Wang
    • Journal Title

      Inverse Probl. Imaging

      Volume: 15 Pages: 367-387

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Levenberg-Marquardt method for solving inverse problem of MRE based on the modified stationary Stokes system2021

    • Author(s)
      Y. Jiang, G. Nakamura, K. Shirota
    • Journal Title

      Inverse Problems

      Volume: 37

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unique continuation property of solutions to general second order elliptic systems2021

    • Author(s)
      N. Honda, C-L. Lin, G. Nakamura, S. Sasayama
    • Journal Title

      J. Inverase Ill-Posed Probl.

      Volume: 30 Pages: 5-21

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Classical unique continuation property for multi-term time-fractional evolution equations2021

    • Author(s)
      C-L. Lin, G. Nakamura
    • Journal Title

      Math. Annalen

      Volume: 「-」 Issue: 1-2 Pages: 551-574

    • DOI

      10.1007/s00208-021-02341-0

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Duality between range and no-response tests and its application for inverse problems2021

    • Author(s)
      Y-H. Lin, G. Nakamura, R. Potthast, H. Wang
    • Journal Title

      Inverse Problems and Imaging

      Volume: 15 Pages: 367-386

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Inverse boundary value problem for a non-linear hyperbolic partial differential equation2021

    • Author(s)
      G. Nakamura, M. Vashisth, M. Watanabe
    • Journal Title

      Inverse Problems

      Volume: 37

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local solvability of an inverse problem to the Navier-Stokes equation with memory term2020

    • Author(s)
      Y. Jiang, J. Fan, S. Nagayasu, G. Nakamura
    • Journal Title

      Inverse Problems

      Volume: 36

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Uniqueness for the inverse boundary value problem of piecewise homogeneous anisotropic elasticity in the time domain2020

    • Author(s)
      C. Carstea, G. Nakamura, M. Vashisth
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 373 Pages: 3423-3443

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Born series for the photon diffusion equation perturbing the Robin boundary condition2020

    • Author(s)
      M. Machida, G. Nakamura
    • Journal Title

      J. Math. Phys

      Volume: 61

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Uniqueness for the inverse boundary value problem of picewise homogeneous elasticity in the time domain2020

    • Author(s)
      C. Carstea, G. Nakamura, L. Oksanen
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 373 Pages: 3423-3443

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Born series for the photon diffusion equation perturbing the Robin boundary condition2020

    • Author(s)
      M. Machida, G. Nakamura
    • Journal Title

      J. Math. Phys.

      Volume: 61 Issue: 1 Pages: 13502-13518

    • DOI

      10.1063/1.5095179

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unique recovery of piecewise analytic density and stiffness tensor from the elastic-wave Dirichlet to Neumann map2019

    • Author(s)
      M. de Hoop, G. Nakamura, J. Zhai
    • Journal Title

      SIAM J. Appl. Math.

      Volume: 79 Pages: 2359-2384

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Reconstruction for the coefficients of a quasilinear elliptic partial differential equations2019

    • Author(s)
      C. Carstea, G. Nakamura, M. Vashisth
    • Journal Title

      Appl. Math. Lett.

      Volume: 98 Pages: 121-127

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Completeness of representation of solutions for stationary homogeneous isotropic elastic-viscoelastic systems2019

    • Author(s)
      J. Eom, G. Nakamura
    • Journal Title

      Quart. Appl. Math.

      Volume: 77 Pages: 497-506

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Uniqueness for the inverse boundary value problem of piecewise homogeneous anisotropic elasticity in the time domain2022

    • Author(s)
      Gen Nakamura
    • Organizer
      10th International Conference “Inverse Problems: Modeling and Simulation”
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Classical unique continuation property for multi-term time-fractional evolution equations2022

    • Author(s)
      Gen Nakamura
    • Organizer
      Days on Diffraction 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Tools for inverse analysis of anisotropic elasticity/viscoelasticity systems2022

    • Author(s)
      Gen Nakamura
    • Organizer
      Workshop on Inverse Problems for Partial Differential Equations
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Forward and inverse analyses for elastic and viscoelastic systems2022

    • Author(s)
      Gen Nakamura
    • Organizer
      The 6th International Workshop on Computational Inverse Problems and Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Forward and inverse analyses for elastic and viscoelastic systems2022

    • Author(s)
      Gen Nakamura
    • Organizer
      The 47th Sapporo Symposium on Partial Differential Equations
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] My miscellaneous impressions of inverse problems and my recent works2022

    • Author(s)
      Gen Nakamura
    • Organizer
      Workshop for young scholars Control and inverse problems on waves, oscillations and flows - Mathematical analysis and computational methods
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 境界値問題に対するサンプリング法2021

    • Author(s)
      中村 玄
    • Organizer
      2021年度日本数学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 非等方弾性方程式に対する境界値逆問題2021

    • Author(s)
      中村 玄
    • Organizer
      2021年度日本数学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Reconstruction Methods for Inverse Boundary Value Problems by Single Measuremen2021

    • Author(s)
      Gen Nakamura
    • Organizer
      XIII Intl. Sci. Conf. Young Scientist School
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Holmgren-John Unique Continuation Theorem for Viscoelastic Systems2021

    • Author(s)
      Gen Nakamura
    • Organizer
      Intl. Conf. “DAYS on DIFFRACTION 2021”
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 非線形双曲型方程式の初期値境界値逆問題2021

    • Author(s)
      中村 玄
    • Organizer
      2021年日本数学会秋季総合分科会
    • Related Report
      2021 Research-status Report
  • [Presentation] 粘弾性方程式に対するHolmgren-Johnの一意接続定理2021

    • Author(s)
      中村 玄
    • Organizer
      2021年日本数学会秋季総合分科会
    • Related Report
      2021 Research-status Report
  • [Presentation] Holmgren-John Unique Continuation Theorem for Viscoelastic Equation2021

    • Author(s)
      Gen Nakamura
    • Organizer
      2nd AAIP Workshop
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Classical unique continuation property for solutions of time fractional evolution equations2021

    • Author(s)
      Gen Nakamura
    • Organizer
      Eurasian Conference on Applied Mathematics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Vibroseis Reflection Exploration for Anisotropic Media,2021

    • Author(s)
      Gen Nakamura
    • Organizer
      The third Russia-Japan Workshop CoMFo21
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Application of the propagation of localized Neumann-Dirchlet map to the vibroseis reflection exploration2020

    • Author(s)
      G. Nakamura
    • Organizer
      Matsuyama Analysis Seminar
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] An inverse problem for anisotropic elastic equation2020

    • Author(s)
      G. Nakamura
    • Organizer
      Conference on Numerical Simulation and Analysis for Nonlinear Phenomena
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Application of the propagation of localized Neumann-Dirchlet map to the vibroseis reflection exploration2020

    • Author(s)
      G. Nakamura
    • Organizer
      12 th Theory and Computational Methods for Inverse and Ill-posed Problems
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Sampling methods for inverse boundary value problem2020

    • Author(s)
      G. Nakamura
    • Organizer
      One day conference, School of Mathematics, Southeast University
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Strong unique continuation for two dimensional anisotropic elliptic systems2019

    • Author(s)
      G. Nakamura
    • Organizer
      AIP conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Convergence of Levenberg-Marquardt method for MRE data analysis2019

    • Author(s)
      G. Nakamura
    • Organizer
      AIP conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Stationary viscoelastic wavefields generated by scalar wave functions2019

    • Author(s)
      G. Nakamura
    • Organizer
      Conference on Differential Equations and Inverse Problems
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-04-18   Modified: 2024-01-30  

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