LU decomposition with spectral factorization in seismic imaging
文献类型：期刊论文
| 作者 | Luo, MQ; Liu, H; Li, YM |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2003-05-01 |
| 卷号 | 46期号:3页码:421-427 |
| 关键词 | seismic imaging LU decomposition spectral factorization |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | The inversion of Helmholtz matrix, a finite-difference representation of Helmholtz operator, plays, a critical role in the numerical methods of seismic modeling and 3D depth migration. The Helmholtz matrix has a Toeplitz structure with a helical boundary condition. It is easy to be inversed by an efficient LU decomposition method I a spectral factorization method (SF method). In this paper we discuss the efficiency of SF method in LU decomposition, the errors of SF method in decomposing the matrix H of several different velocity models, errors distribution and their effects on seismic imaging. The result in this paper indicates that for constant velocity model all the arrays of matrix H have same nonzero values, and the errors brought by SF method will not affect the computation of wave fields if an absorb boundary condition is used; for non-constant velocity model, each array in matrix H has different nonzero values, and the error increases with variability degree of the velocity model, which are fatal to wave fields calculation. Therefore, once a SF method is used to calculate the wave field in seismic modeling and imaging, the errors given by this method should be considered to ensure a correct wave fields, which will be discussed in another paper. |
| WOS关键词 | WAVE-PROPAGATION ; EXTRAPOLATION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000183344600022 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78837]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Luo, MQ |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA |
| 推荐引用方式 GB/T 7714 | Luo, MQ,Liu, H,Li, YM. LU decomposition with spectral factorization in seismic imaging[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2003,46(3):421-427. |
| APA | Luo, MQ,Liu, H,&Li, YM.(2003).LU decomposition with spectral factorization in seismic imaging.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,46(3),421-427. |
| MLA | Luo, MQ,et al."LU decomposition with spectral factorization in seismic imaging".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 46.3(2003):421-427. |
入库方式： OAI收割
来源：地质与地球物理研究所
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