Accuracy-constrained optimisation methods for staggered-grid elastic wave modelling

doi:10.1111/1365-2478.12571

	Accuracy-constrained optimisation methods for staggered-grid elastic wave modelling
	Chen, Jing-Bo 1,2; Dai, Meng-Xue 2
刊名	GEOPHYSICAL PROSPECTING
	2017-12-01
卷号	65 页码:150-165
ISSN号	0016-8025
DOI	10.1111/1365-2478.12571
文献子类	Article
英文摘要	The classical finite-difference methods for seismic wave modelling are very accurate at low wavenumbers but suffer from inaccuracies at high wavenumbers, particularly at Nyquist wavenumber. In contrast, the optimisation finite-difference methods reduce inaccuracies at high wavenumbers but suffer from inaccuracies at low wavenumbers, particularly at zero wavenumber when the operator length is not long and the whole range of wavenumbers is considered. Inaccuracy at zero wavenumber means that the optimisation methods only have a zeroth-order accuracy of truncation and thus are not rigorously convergent. To guarantee the rigorous convergence of the optimisation methods, we have developed accuracy-constrained optimisation methods. Different-order accuracy-constrained optimisation methods are presented. These methods not only guarantee the rigorous convergence but also reduce inaccuracies at low wavenumbers. Accuracy-constrained optimisation methods are applied to staggered-grid elastic wave modelling.
WOS关键词	FINITE-DIFFERENCE SCHEMES ; PSEUDOSPECTRAL METHOD ; LEAST-SQUARES ; EQUATION ; BOUNDARY ; PROPAGATION ; MEDIA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY
WOS记录号	WOS:000418757400010
资助机构	National Natural Science Foundation of China(41674132 ; National Natural Science Foundation of China(41674132 ; 41474104) ; 41474104) ; National Natural Science Foundation of China(41674132 ; National Natural Science Foundation of China(41674132 ; 41474104) ; 41474104) ; National Natural Science Foundation of China(41674132 ; National Natural Science Foundation of China(41674132 ; 41474104) ; 41474104) ; National Natural Science Foundation of China(41674132 ; National Natural Science Foundation of China(41674132 ; 41474104) ; 41474104)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82186]
专题	中国科学院地质与地球物理研究所
通讯作者	Chen, Jing-Bo
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jing-Bo,Dai, Meng-Xue. Accuracy-constrained optimisation methods for staggered-grid elastic wave modelling[J]. GEOPHYSICAL PROSPECTING,2017,65:150-165.
APA	Chen, Jing-Bo,&Dai, Meng-Xue.(2017).Accuracy-constrained optimisation methods for staggered-grid elastic wave modelling.GEOPHYSICAL PROSPECTING,65,150-165.
MLA	Chen, Jing-Bo,et al."Accuracy-constrained optimisation methods for staggered-grid elastic wave modelling".GEOPHYSICAL PROSPECTING 65(2017):150-165.