| 基于BP网络的视电阻率快速计算 |
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| 引用本文： | 谢品芳,谢林涛,付志红,张淮清.基于BP网络的视电阻率快速计算[J].重庆大学学报(自然科学版),2009,32(9):1111-1116. |
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| 作者姓名： | 谢品芳 谢林涛 付志红 张淮清 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(40874094);;三峡库区生态环境教育部重点实验室访问学者基金资助项目(KLVF-2007-1) |
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| 摘 要： | 为避开复杂的电磁场数值计算,判断地下异常,用于现场指导,提出了神经网络的方法。讨论了实际发射机电流的非阶跃下降,并结合所用发射机对响应公式进行了关断延时校正。分析了常规的数值计算方法,由核函数的特点选用三层反向传播(back propagation,BP)网络结构,通过训练确定隐含层单元数和收敛较好的算法。用2种常规的数值算法与文中方法做仿真实验的对比,实验表明,用BP网络计算能快速实现瞬变电磁数据的处理,指导瞬变电磁探测。
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| 关 键 词： | 瞬变电磁法 关断效应 BP网络 视电阻率 |
| 收稿时间： | 2009/5/16 0:00:00 |
Fast algorithm for apparent resistivity calculation based on back propagation neural networks |
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| XIE Pin fang,XIE Lin tao,FU Zhi hong and ZHANG Huai qing.Fast algorithm for apparent resistivity calculation based on back propagation neural networks[J].Journal of Chongqing University(Natural Science Edition),2009,32(9):1111-1116. |
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| Authors: | XIE Pin fang XIE Lin tao FU Zhi hong and ZHANG Huai qing |
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| Affiliation: | State Key Laboratory of Power Transmission Equipment & System Security and New Technology;Chongqing University;Chongqing 400030;P.R.China |
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| Abstract: | To avoid the complex numerical calculation for the electromagnetic field and determine underground abnormality,a neural network based method is proposed.In consideration of turn-off transmitter current,the effect of a linear ramp turn-off current on transmitter is corrected.The characteristics of transient expression and the traditional calculation algorithm for apparent resistivity are analyzed,and a predigest structure of network is obtained based on the kernel expression.The three-layer back propagation(... |
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| Keywords: | transient electromagnetic method turn-off effect BP neural networks apparent resistivity |
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