DEVELOPMENT OF AN EFFICIENT DIFFRACTION TOMOGRAPHY TECHNIQUE WITH FAST-CONVERGENCE AND HIGH-RESOLUTION PROPERTIES APPLIED TO IMAGING OF UNDERGROUND OBJECTS
开发具有快速收敛和高分辨率特性的高效衍射断层扫描技术,应用于地下物体成像
基本信息
- 批准号:08650503
- 负责人:
- 金额:$ 1.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1996
- 资助国家:日本
- 起止时间:1996 至 1997
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1.The problem of imaging a homogeneous rectangular object in cross-well geometry is considered using the revised Marquardt method. Numerical results prove that the iterative scheme provides high-quality reconstructions with fast cnvergence property regardless of the polarization of the received electric field. Furthermore we investigate the inverse scattering of an inhomogeneous cubic object, which is located in free space. It is seen from the numerical results that the object's permittivity can be successfully reconstructed even in the presence of measurement error in the scattered field data.2.In the electromagnetic scattering by a circular cylinder, we expand the permittivity profile of the object in a wavelet series to obtain the scattered field. It is shown that the memory storage and the computation time can be cosiderably reduced in comparison with the conventional moment method. Next, we deal with the scattering of a pulsed wave by a two-layred cylinder using the FDTD method. Numerical results confirm the we can esimate the inner structure and the medium parameter of the object from the scattering response.3.We study the reconstructinon of the permittivity of two-and four-layred media using the FDTD method. An iterative algorithm is derived employing the revised quasi-Newton method and wavelet expansion. It is concluded from the numerical results that we can obtain the fast-convergence and high-resolution image of the permittivity. This algorithm is also applied to imaging of a dielectric circular cylinder. Numerical examples demonstrate that we can successfully estimate the position and the permittivity of the object.It is neccessary to clarify the relationship between the object's properties and the waveform of the scattered field. Furthermore image reconstruction using real data is very important. These are the topics for future work.
1.利用修正的MarQuardt方法研究了井间几何中均匀矩形目标的成像问题。数值结果表明,无论接收电场的极化程度如何,迭代格式都能提供高质量的重建结果,且具有快速收敛的特性。此外,我们还研究了自由空间中非均匀立方体目标的逆散射问题。从数值结果可以看出,即使在散射场数据中存在测量误差的情况下,物体的介电常数也能被成功地重建。2.在圆柱体的电磁散射中,我们将物体的介电常数分布展开为小波级数,得到散射场。结果表明,与传统的矩量法相比,该方法可以显著减少内存和计算时间。接下来,我们用FDTD方法处理了脉冲波在双层柱体上的散射问题。数值结果证实了我们可以从散射响应中模拟出物体的内部结构和介质参数。3.研究了用FDTD方法重建两层和四层介质的介电常数。利用修正的拟牛顿法和小波展开,推导了一种迭代算法。从数值结果可以看出,我们可以得到快速收敛和高分辨率的介电常数图像。该算法也适用于介质圆柱的成像。数值例子表明,我们可以成功地估计物体的位置和介电常数,有必要弄清楚物体的性质与散射场的波形之间的关系。此外,利用真实数据进行图像重建是非常重要的。这些都是今后工作的主题。
项目成果
期刊论文数量(34)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Takenaka, D.J.N.Wall, H.Harada, M.Tanaka: "Reconstruction Algorithm of the Refractive Index of a Cylindrical Object from the Intensity Measurements of the Total Field" Microwave and Optical Technology Letters. 14. 182-188 (1997)
T.Takenaka、D.J.N.Wall、H.Harada、M.Tanaka:“根据总场强度测量重建圆柱形物体折射率的算法”微波和光学技术快报。
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- 影响因子:0
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T.Hiraoka, M.Tanaka, W.-M.Boerner: "Three-Dimensional Inverse Scattering of Buried Dielectric Objects in Cross-Well Geometry" Proc.6th International Conference on Ground Penetrating Radar. 223-228 (1996)
T.Hiraoka、M.Tanaka、W.-M.Boerner:“跨井几何中埋藏电介质物体的三维逆散射”Proc.6th 国际探地雷达会议。
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T.Takenaka, D.J.N.Wall, H.Harada, and M.Tanaka: "Reconstruction Algorithm of the Refractive Index of a Cylindrical Object from the Intensity Measurements of the Total Field" Microwave and Optical Technology Letters. Vol.14, No.3. 182-188 (1997)
T.Takenaka、D.J.N.Wall、H.Harada 和 M.Tanaka:“根据总场强度测量重建圆柱形物体的折射率”微波和光学技术快报。
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- 影响因子:0
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M.Tanaka and T.Hiraoka: "Three-Dimensional Inverse Scattering Applicable to Electromagnetic Imaging of Dielectric Objects" Proc.Sino-Japanese Joint Meeting on Optical Fiber Science and Electromagnetic Theory. 103-108 (1997)
M.Tanaka 和 T.Hiraoka:“适用于介电物体电磁成像的三维逆散射”中日光纤科学与电磁理论联席会议论文集。
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- 影响因子:0
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T.Kudou and M.Tanaka: "Reconstruction of Permittivity Distributions of Stratified Media Using Back-Scattering Responses of a Pulsed Wave" Digests of Seoul National University-Oita University Joint Symposium on the Applied Electromagnetics. 47-48 (1998)
T.Kudou 和 M.Tanaka:“利用脉冲波的反向散射响应重建分层介质的介电常数分布”首尔国立大学-大分大学应用电磁学联合研讨会摘要。
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TANAKA Mitsuru其他文献
TANAKA Mitsuru的其他文献
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{{ truncateString('TANAKA Mitsuru', 18)}}的其他基金
Research on the synergistic enhancement of physiological functions by food components
食品成分协同增强生理功能的研究
- 批准号:
22880024 - 财政年份:2010
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Research Activity Start-up
Development of High-Accuracy Visualization Algorithm for Concrete Structure with Electromagnetic Radar
电磁雷达混凝土结构高精度可视化算法开发
- 批准号:
19560348 - 财政年份:2007
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Theoretical Study on High-Quality Visualization of Breast Cancer Using Microwaves
利用微波对乳腺癌进行高质量可视化的理论研究
- 批准号:
13680943 - 财政年份:2001
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Studies on the State Change of Surface Active Sobstances in Solution.
溶液中表面活性物质状态变化的研究。
- 批准号:
60470011 - 财政年份:1985
- 资助金额:
$ 1.34万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
相似海外基金
Next-Generation Imaging Technique for Underground Object Detection
用于地下物体检测的下一代成像技术
- 批准号:
0324348 - 财政年份:2003
- 资助金额:
$ 1.34万 - 项目类别:
Continuing Grant