摘要
本文研究同轴线中分层媒质电特性重建的病态问题 ,对病态出现以及病态加剧的原因进行分析 ,指出与改变同轴线终端负载进行多次测量相比 ,改变频率多次测量可获得更多有效的信息以确保重建结果的唯一性和改善问题的病态特性 .采用Levenberg Marquardt算法的模拟重建结果证实了这一点 .该结论对实际测量结果重建具有指导意义 .
Ill-conditioned problem in reconstruction of layered medium inside coaxial line is considered.The cause of appearance and aggravation of ill-conditionedness is discussed and it is presented that compared with multi-impedance measurements,multi-frequencies measurements are easier to get more effective information so as to ensure the uniqueness of reconstruction solution and weaken the ill-conditionedness.Using Levenberg-Marquardt algorithm,the numerical simulation results confirm this conclusion which can direct the practical reconstruction.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第6期911-914,共4页
Acta Electronica Sinica
基金
国家自然科学基金杰出青年科学基金 (No 60 1 2 51 0 2 )
关键词
分层媒质
重建
病态
layered medium
reconstruction
Ill-conditioned
