利用倾斜反斜面源近似反演台湾西南部活动泥质断裂带重力异常的饥饿游戏搜索优化方法

IF 2.2 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Hanbing Ai , Khalid S. Essa , Yunus Levent Ekinci , Çağlayan Balkaya , Yves Géraud
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引用次数: 0

摘要

海底泥流(MD)和火山通常与天然气水合物和碳氢化合物有关,是台湾西南部近海地区的普遍特征。尽管这些地貌非常重要,但除了少数研究外,还没有对这些泥质斜长岩的重力特征进行过调查。因此,我们的研究旨在利用最近提出的优化算法--饥饿游戏搜索(HGS)来估算代表活跃 MD 的倾斜二维反斜面结构的模型参数,从而填补这一空白。该方法应用于从台湾西南海岸获得的重力异常。在应用之前,我们通过生成模型参数对的误差景观图,探索了与该逆问题相关的成本函数的非线性和高维特性。随后,为了减轻挑战,我们执行了参数调整程序。利用从该程序中得出的最优控制参数,我们提高了 HGS 算法处理问题的效率。此外,我们还采用了标准粒子群优化算法(PSO)进行比较,这是一种在地球物理反演研究中广泛使用的元启发式算法。研究结果表明,与 PSO 相比,所提出的新算法具有更高的准确性和可靠性。此外,与基于倾斜堤状结构的近似值相比,倾斜反斜面结构与现有地震反射结果的解释具有更好的一致性。此外,HGS 与两种成熟技术(即相关成像和紧凑反演算法)的对比分析进一步验证了 HGS 的有效性。因此,我们断言,新颖的 HGS 优化器是反重力问题的一种稳健而有吸引力的工具。此外,假设二维倾斜反斜面源类型有望扩展到台湾西南部上坡区域的其他 MD。这些工作可以在更大范围内大大提高对区域泥质断裂和火山活动的认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hunger Games Search optimization for the inversion of gravity anomalies of active mud diapir from SW Taiwan using inclined anticlinal source approximation

Submarine mud diapirs (MDs) and volcanoes, often linked with gas hydrates and hydrocarbons, are prevalent features in the offshore region of SW Taiwan. Despite their significance, the gravity signatures of these MDs have not been investigated except for a few studies. Therefore, our study aims to address this gap by employing a recently proposed optimization algorithm, Hunger Games Search (HGS), to estimate model parameters of an inclined 2D anticlinal structure representative of an active MD. This approach was implemented to gravity anomaly obtained from SW coast of Taiwan. Before its application, we explored the nonlinear and high-dimensional characteristics of the cost function associated with this inverse problem by generating error landscape maps for model parameter pairs. Subsequently, to mitigate the challenges, a parameter tuning procedure was performed. Using the optimal control parameters derived from this procedure, we increased the efficacy of the HGS algorithm for the problem handled. Furthermore, we employed standard Particle Swarm Optimization (PSO), a widely utilized metaheuristic in geophysical inversion studies, for a comparison. The findings showed that the proposed novel algorithm yielded superior accuracy and reliability compared to PSO. Additionally, the inclined anticlinal structure exhibited better agreement with interpretation obtained from available seismic reflection outcomes, in contrast to approximation based on inclined dike-like structure. Besides, comparative analyses between HGS and two well-established techniques, namely correlation imaging and compact inversion algorithms further validated the effectiveness of HGS. Consequently, we assert that the novel HGS optimizer is a robust and appealing tool for inverse gravity problems. Moreover, assuming a 2D inclined anticlinal source type holds promise for extended investigations into other MDs in SW Taiwan's upper slope region. Such efforts can significantly enhance the understanding of regional mud diapirism and volcanism on a broader scale.

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来源期刊
Journal of Applied Geophysics
Journal of Applied Geophysics 地学-地球科学综合
CiteScore
3.60
自引率
10.00%
发文量
274
审稿时长
4 months
期刊介绍: The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.
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