We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Optimized Refraction Travel Time Tomography.
- Authors
Liu, Sixin; Jia, Zhuo; Zhu, Yinuo; Zhao, Xueran; Cheng, Siyuan
- Abstract
In seismic refraction exploration, travel time tomography is the most widely used method in engineering and environmental geophysical exploration. In this paper, we mainly optimize the travel time tomography of refraction. First, with respect to the forward algorithm, we introduce a new travel time calculation method to improve the accuracy and efficiency of forward calculation. Based on the fast marching method (FMM), we introduce an improved forward calculation method called the multi-stencil fast marching method (MSFM). In the process of inversion, we propose a dynamic prior model composite constraint (DPMCC) method based on the T0 difference method from the idea of multi-scale inversion. Meanwhile, we use the prior information to improve the accuracy of inversion. Furthermore, we use the dynamic regularization factor selection method to make the inversion solution more stable and reliable. Finally, we test and analyze the synthetic data and the measured data to verify the effectiveness of the optimized travel time tomography algorithm.
- Subjects
GEOPHYSICAL prospecting; TOMOGRAPHY; SEISMIC prospecting; ENVIRONMENTAL engineering; TIKHONOV regularization; PROGRESSIVE collapse
- Publication
Applied Sciences (2076-3417), 2019, Vol 9, Issue 24, p5439
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app9245439