| 广域视电阻率的数值计算方法 |
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| 引用本文： | 王顺国,熊彬. 广域视电阻率的数值计算方法[J]. 物探化探计算技术, 2012, 34(4): 380-383 |
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| 作者姓名： | 王顺国 熊彬 |
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| 作者单位： | 1. 中南大学地球科学与信息物理学院,湖南长沙410083;有色及贵金属隐伏矿床勘查教育部工程研究中心,广西桂林541004;广西地质工程中心重点实验室,广西桂林541004;桂林理工大学地球科学学院,广西桂林541004
2. 有色及贵金属隐伏矿床勘查教育部工程研究中心,广西桂林541004;广西地质工程中心重点实验室,广西桂林541004;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，国家高技术研究发展计划项目，广西自然科学基金 |
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| 摘 要： | 广域视电阻率与卡尼亚视电阻率相比,能更好地表征地下介质的电性变化规律,一般常使用迭代法和逆插值法求解,这里使用这两种算法对E—Ex方式广域视电阻率进行了计算.结果表明,使用这两种算法所得广域视电阻率,都正确反映了地下介质的电性变化规律,逆插值的影响因素较少,计算过程稳定.其不足之处在于要求插值目标函数单调,迭代法步骤简单,并存在迭代发散的情况.在实际应用时,可根据广域视电阻率公式的特点,选择适当的方法进行计算.
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| 关 键 词： | 广域电磁法 E-Ex方式广域视电阻率 迭代法 逆插值法 |
NUMERICAL CALCULATION METHODS OF WIDE FIELD APPARENT RESISTIVITY |
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| WANG Shun-guo,、,、,、,XIONG Bin. NUMERICAL CALCULATION METHODS OF WIDE FIELD APPARENT RESISTIVITY[J]. Computing Techniques For Geophysical and Geochemical Explorationxploration, 2012, 34(4): 380-383 |
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| Authors: | WANG Shun-guo 、 、 、 XIONG Bin |
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| Affiliation: | 2、3、4(1.School of Geosciences and Info-Physics,Central South University,Changsha 410083,China;2.Nonferrous and precious metal deposit prospecting engineering research center of Education Ministry,Guilin 541004,China;3.Guangxi Key Laboratory of Geological Engineering Center,Guilin 541004,China;4.College of Earth Sciences,Guilin University of Technology,Guilin 541004,China) |
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| Abstract: | Wide field apparent resistivity is superior to cagniard apparent resistivity in reflecting transformation rules of the homogeneous underground media,and we usually can acquire the value of wide field electromagnetic method by iterative algorithm and inverse interpolation algorithm.In order to compare the two methods,we have done some computation research.By the large calculating work to prove the results from both methods could correctly reflect transformation rules of the inhomogeneous underground media.The process of inverse interpolation algorithm is steady without too much constraint conditions,however,the iterative algorithm do not need the precondition that the objective function must be monotonic,and it has simple operation,but the algorithm maybe divergent.So the suggestion is that we should choose the calculation method by the characteristics the function has. |
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| Keywords: | wide field electromagnetic methodl wide field apparent resistivity iteration algorithm inverse interpolation algorithm |
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