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模拟退火法计算大定源瞬变电磁法的视电阻率

Keywords: 模拟退火法,大定源瞬变电磁法,矩形回线,视电阻率

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Abstract:

?利用模拟退火法拟合理论感应电动势和实测感应电动势,可获得大定源瞬变电磁法矩形发射回线内测点的视电阻率,本文采用均匀半空间和三层地电模型验证了算法的精度和稳定性。以均匀半空间地电模型验证时,采用不同初始模型运行该算法20次,得到的视电阻率大部分与真实电阻率误差在0.5%以内,部分误差在1.5%~6.0%之间,这些误差较大的时刻随机分布。每次迭代计算约40次即可获得高精度的视电阻率值。以三层地电模型验证时,通过与翁爱华利用二分法计算的视电阻率比较,进一步验证了本文算法的正确性。

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