| 电磁散射问题的两种反演方法研究 |
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| 引用本文： | 张宇,杨曦,苟铭江,史庆藩.电磁散射问题的两种反演方法研究[J].物理学报,2010,59(6):3905-3911. |
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| 作者姓名： | 张宇 杨曦 苟铭江 史庆藩 |
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| 作者单位： | (1)北京理工大学理学院，北京 100081; (2)北京理工大学信息与电子学院，北京 100081 |
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| 基金项目： | 国防科技预研基金 (批准号:200907451256)资助的课题. |
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| 摘 要： | 提出了电磁散射问题的两种反演方法:确定性梯度搜索方法和MonteCarlo随机搜索方法.给出了两种方法的基本原理,并对反演性能包括对散射体的定位能力、反演精度、反演时间进行了系统的分析与比较.数值计算结果表明,确定性方法定位精确,而随机性方法对散射体电磁参数的反演精度高且速度快,利用两者优点可以增强反演效果.
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| 关 键 词： | 电磁散射 反演迭代 确定性方法 随机搜索 |
| 收稿时间： | 2009-07-20 |
Two inversion methods for electromagnetic scattering |
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| Zhang Yu,Yang Xi,Gou Ming-Jiang,Shi Qing-Fan.Two inversion methods for electromagnetic scattering[J].Acta Physica Sinica,2010,59(6):3905-3911. |
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| Authors: | Zhang Yu Yang Xi Gou Ming-Jiang Shi Qing-Fan |
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| Institution: | School of Science, Beijing Institute of Technology, Beijing 100081, China;School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China;School of Science, Beijing Institute of Technology, Beijing 100081, China;School of Science, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Two inversion methods for electromagnetic scattering, the deterministic gradient search method and the Monte Carlo random search method, are proposed in this paper. Firstly, the fundamental principles of the two methods are introduced. Inversion properties including the positioning capability of the scattering body, inversion accuracy and inversion time of the two methods are analyzed and compared. Simulation results demonstrates that the deterministic gradient search method can be used for scattering body positioning and the results using Monte Carlo random search method have high-precision at the same time have high speed. Successive applications of both methods fully realize the advantages of the two methods and improve the inversion result. |
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| Keywords: | electromagnetic scattering inversion iterative deterministic method random search |
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