| 二维密度界面的遗传算法反演 |
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| 引用本文： | 刘云峰 沈晓华. 二维密度界面的遗传算法反演[J]. 物探化探计算技术, 1997, 19(2): 138-142 |
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| 作者姓名： | 刘云峰 沈晓华 |
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| 作者单位： | 浙江大学 |
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| 摘 要： | 二维密度界面的反演可表述成非线性优化问题，本文用遗传算法进行反演计算，首先把连续的密度界面分割成若干单元，在单元中用形函数拟合，再用高斯积分求解重力异常值，把约束条件和拟合方差组合成目标函数，用园柱体和二维盆地模型的反演实例表明，用遗传算法，反演二维密度界面是可行的
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| 关 键 词： | 重力反演 遗传算法 数值积分 正则化条件 |
NONLINEAR INVERSION OF GRAVITY ANOMALIES CAUSED BY 2 D SURFACE OF GEOLOGIC STRUCRURES GENETIC ALGORITHMS |
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| Liu Yunfeng Shen Xiaohua. NONLINEAR INVERSION OF GRAVITY ANOMALIES CAUSED BY 2 D SURFACE OF GEOLOGIC STRUCRURES GENETIC ALGORITHMS[J]. Computing Techniques For Geophysical and Geochemical Explorationxploration, 1997, 19(2): 138-142 |
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| Authors: | Liu Yunfeng Shen Xiaohua |
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| Abstract: | Inversion of gravity anomalies caused by 2 D surface geologic structures is one of many geophysical problems whichcan be identified as a nonlinear optimization problem. We have investigated the applicability of "genetic algorithms"(GA) to calculate this inverse problem. The continuous surface of geologic structures is divided into several elements. Thr surface in the elements is matched with polynomial. Gauss numericalintegration is employed to calculated gravity anomalies. The Combination of matching error and restraint condition is used as the fitness function. Two examples are presented in the paper, the results show to be ideal, which prove it available for GA to inverse gravity data caused by 2 D surface of geologic structures. |
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| Keywords: | gravity inversion GA numerical integral restraint condition |
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