| 广域电磁法H-HZ方式波数域的一次场特征 |
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| 引用本文： | 王顺国,熊彬,王有学,李长伟.广域电磁法H-HZ方式波数域的一次场特征[J].桂林工学院学报,2012,32(2):179-183. |
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| 作者姓名： | 王顺国 熊彬 王有学 李长伟 |
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| 作者单位： | 1. 中南大学地球科学与信息物理学院,长沙410083;桂林理工大学地球科学学院,广西桂林541004
2. 桂林理工大学地球科学学院,广西桂林,541004 |
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| 基金项目： | 国家自然科学基金项目，国家高技术研究发展计划项目，广西自然科学基金项目，广西高校优秀人才资助计划项目资助 |
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| 摘 要： | 电磁法2.5维正反演中,逆傅里叶变换是不可缺少的步骤,而波数选取是否合理决定逆变换精度.以广域电磁法H-HZ方式为例,从多个角度进行计算分析,讨论了波数域中一次场hz的特征及相关问题.结果表明,波数域中磁场曲线形态与空间域是相似的,且过大的波数对应的磁场值非常小,对提高计算精度没有帮助.选取了一组波数,经验证是合理的.从计算结果看,Chave算法的积分结果比Anderson算法的精度要高.
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| 关 键 词： | 广域电磁法 波数域 一次场特征 Chave算法 Anderon算法 |
Wave-Number Domain Features of Primary Field of H -Hz Arrangement Wide Field Electromagnetic Method |
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| WANG Shun-guo
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XIONG Bin
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WANG You-xue
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LI Chang-wei.Wave-Number Domain Features of Primary Field of H -Hz Arrangement Wide Field Electromagnetic Method[J].Journal of Guilin University of Technology,2012,32(2):179-183. |
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| Authors: | WANG Shun-guo XIONG Bin WANG You-xue LI Chang-wei |
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| Affiliation: | 1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China ; 2. College of Earth Sciences, Guilin University of Technology, Guilin 541004, China) |
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| Abstract: | In the 2.5D forward and inverse modeling of controlled source electromagnetic method （ CSEM）, inverse Fourier transform is unavoidable, whether the results are right or wrong is decided by the wave-numbers. In order to research the key point, the wave-number domain primary field of H - Hz wide field electromagnetic method is calculated, the corresponding features are analyzed at the same time. The conclusions show us that both in space domain and in wave-number domain, the characteristics of magnetic curves are alike. Besides, large wave-number leads to very smaller magnetic value. These only can waste the time, but have no use for improving the precision of the results. A group wave-numbers are selected which is reasonable. The computation of the Chave＇s algorithm is superior to the Anderson＇s algorithm. |
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| Keywords: | wide field electromagnetic method wave-number domain features of the primary field Chave＇s algorithm Anderson＇s algorithm |
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