FULL-VECTORIAL PARALLEL FINITE-ELEMENT CONTRAST SOURCE INVERSION METHOD
FULL-VECTORIAL PARALLEL FINITE-ELEMENT CONTRAST SOURCE INVERSION METHOD
复制标题
全矢量并行有限元对比源反演方法
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Lovetri
中科院分区：
文献类型：
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作者：
A. Zakaria;I. Jeffrey;J. Lovetri
采用乘性正则化细颗粒元素对比源反演法(MR-FEM-CSI)求解全矢量三维逆散射问题。对比度和对比度源优化变量位于问题域内四面体的质心；而电磁场则根据同一四面体上的边基函数展开。为了应用乘法正则化，创建了一个双重网格。为了处理大规模问题，利用MPI库实现了求逆算法的并行化，并利用PETSC支持稀疏矩阵和向量计算。使用从Institut Fresnel数据库获得的实验数据集对该算法进行了测试。合成实例表明，该技术能够成功地对部分褶皱的粮仓内的水分热点进行成像。
The multiplicatively regularized flnite-element contrast source inversion algorithm (MR-FEM-CSI) is used to solve the full- vectorial three-dimensional (3D) inverse scattering problem. The contrast and contrast-source optimization variables are located at the centroids of tetrahedra within the problem domain; whereas the electric fleld is expanded in terms of edge basis functions on the same tetrahedra. A dual-mesh is created in order to apply the multiplicative regularization. To handle large-scale problems the inversion algorithm is parallelized using the MPI library, with sparse matrix and vector computations supported by PETSc. The algorithm is tested using experimental datasets obtained from the Institut Fresnel database. A synthetic example shows that the technique is able to successfully image moisture hot-spots within a partially fllled grain bin.