From 1920s up to now , various techniques and methods for wave field decomposition , propagation and migration / imaging have been well developed , such as the kirchhoff asymptotic method , frequency - wavenumber domain phase - shift and phase - shift - plus - interpolation methods , and the one - way wave equation based phase - screen and generalized screen methods , etc . wave field extrapolation in these methods is implemented based on the expansion of the wave field by sets of basic functions like spatial fourier harmonies , modes , and green ' s functions 自上個(gè)世紀(jì)二十年代至今,波場(chǎng)分解、傳播與偏移成像技術(shù)經(jīng)歷了將近一個(gè)世紀(jì)的發(fā)展,形成了多種不同的方法,如kirchhoff波動(dòng)方程高頻近似解方法,頻率-波數(shù)域的相移( phase - shift )方法和相移-內(nèi)插( pspi )方法,以及在混合域中基于單向波動(dòng)方程的相位屏、廣義屏方法等。