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A jumping regularization approach based on reconstruction of stabilizing functional for constrained inverse problem

机译:基于稳定泛函重构的约束反问题跳跃正则化方法

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In the framework of regularization theory, a priori geologic information is included in the inversion process and formalized by means of the stabilizer. Based on available geologic information, which specific stabilizer to choose is still lack of evidence among the alternatives. In order to provide a selection strategy of the stabilizer in the unified framework, we develop a new technique to solve the inverse problems constrained by different stabilizers, called jumping regularization approach based on reconstruction of stabilizing functional. First, we reconstruct stabilizers as the weighted least-squares norm of a kernel function. Reconstruction idea in our technique provides a better understanding of how stabilizers differ from each other and what the core of minimization of stabilizing functional is. Then, in the simple and unified framework of jumping approach, which iteratively solves for model itself during the inversion, the solution to each inverse problem with the specific stabilizer can be readily achieved by replacing the form of kernel function and weight function. Each constrained inverse problem solved with our technique has been successfully tested on the synthetic data of layered magnetotelluric models. Our research provides a more reasonable basis for selecting different stabilizers in inversion, meanwhile providing a solving method for more flexible tests.
机译:在正则化理论框架下,反演过程中包含先验地质信息,并通过稳定器将其形式化。根据现有的地质信息,在备选方案中选择哪种特定的稳定剂仍然缺乏证据。为了在统一的框架下提供稳定器的选择策略,我们开发了一种新的技术来解决受不同稳定器约束的反问题,称为基于稳定泛函重构的跳跃正则化方法。首先,我们将稳定器重构为核函数的加权最小二乘范数。我们的技术中的重构思想提供了一个更好的理解,即稳定器之间的差异,以及稳定函数最小化的核心是什么。然后,在简单统一的跳跃法框架下,在反演过程中为模型本身迭代求解,通过替换核函数和权函数的形式,可以很容易地解决带有特定稳定器的每个反问题。用我们的技术解决的每个约束反问题都已在层状大地电磁模型的合成数据上成功地进行了测试。我们的研究为反演中选择不同的稳定器提供了更合理的依据,同时也为更灵活的试验提供了解决方法。

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