期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：3
页码：1-7
DOI：10.1088/1755-1315/304/3/032019
出版社：IOP Publishing
摘要：Full-wave adjoint inversion method can be formulated via the Lagrange multiplier approach, taking the forward seismic wave equation as an additional independent constraint on synthetic wavefield. The adjoint wave equation is explained as the Lagrange multiplier where the local minimum existed, in case the model parameters are unperturbed. Such an explanation is unsatisfactory, due to the fact that the variation of synthetic wavefield equals to zero in case the model parameters are unperturbed. To avoid such a contradiction, we give a more clear explanation about the meaning of the adjoint wave equation, that it serves for converting the gradient of misfit function with respect to synthetic wavefield to the gradient of misfit function with respect to the model parameter.
