one-way wave equation造句
例句與造句
- We derive a scheme of the separable expression of the reflection / transmission operator is represented , which can be used to model primary reflected waves in the one - way wave equation seismic modeling
摘要本文導(dǎo)出了一種由單程波方程利用反射透射算子的可分表示方法模擬復(fù)雜介質(zhì)中一次反射地震波的數(shù)值算法。 - In the thesis , the fundamental formula of ffd method derives from the square root that is approximated by a continued fraction expansion in the one - way wave equation . optimizations of the parameters of the finite - difference operator improve the validity of the method
本論文用連分式近似單程波波動(dòng)方程中的平方根導(dǎo)出ffd算法的基本公式，并對ffd算法中的有限差分算子進(jìn)行了系數(shù)優(yōu)化，進(jìn)一步提高了計(jì)算的有效性。 - Different from the scattering theory used in the derivation of conventional generalized screen propagator , in this paper , a high order formula of generalized screen propagator for one - way wave equation is proposed by using the asymptotic expansion of single - square - root operator
摘要不同于常規(guī)廣義屏傳播算子的推導(dǎo)中使用散射理論，本文利用單平方根算子的漸近展開，推導(dǎo)出了單程波方程廣義屏傳播算子的高階表達(dá)式。 - Another contribution in this paper is that a novel absorbing boundary condition based on the one - way wave equations has been proposed . it is more effective both in theoretical analyses and numerical simulations when compared to other widely used boundary conditions such as second order mur abc ' s
本文的在應(yīng)用對時(shí)域有限差分法的同時(shí)，也對其吸收邊界條件進(jìn)行初步研究，提出了一種新的局域吸收邊界條件，并通過計(jì)算機(jī)仿真證明了這種邊界條件的有效性。 - Author , starts from the one - way wave equation of wavefield extrapolation , research the relationship and transform condition of wavefield extrapolation operators , and propose the steady variational reference slowness rytov approximation general screen wavefield extrapolation operator ( vrselrf ) which can adapt severe lateral velocity variations , in frequency - wavenumber domain , and the improved wavefield extrapolation scheme , also give the method to improve the computation efficiency . the achievement establishes the theoretic basis of the whole research
首先，從波場延拓的單程波方程出發(fā)，系統(tǒng)地研究了頻率波數(shù)域的波場延拓算子之間的相互關(guān)系和轉(zhuǎn)換條件并在此基礎(chǔ)上提出了能適應(yīng)劇烈橫向變速的頻率波數(shù)域穩(wěn)定的變參考慢度rytov近似廣義屏波場延拓算子( vrselrf )和部分波場延拓改進(jìn)方案及提高運(yùn)算效率的措施，為整個(gè)研究打下理論基礎(chǔ)。 - It's difficult to find one-way wave equation in a sentence. 用one-way wave equation造句挺難的
- The seismic modeling algorithm includes in two key steps in which one is for calculating effective elastic parameters in a fractured and caved media by using elastic wave equation , the other is for wave extrapolating by using acoustic one - way wave equation based on an equivalent geology model consisting of those effective parameters
地震正演方法包含兩個(gè)關(guān)鍵步驟，一是利用彈性波動(dòng)方程計(jì)算含縫洞介質(zhì)的有效彈性參數(shù)，另一步驟是根據(jù)有效彈性參數(shù)構(gòu)成的等效地質(zhì)模型，用單程聲學(xué)波動(dòng)方程進(jìn)行波場延拓。 - Firstly , the paper starts from the one - way wave equation of wavefield extrapolation , research the relationship and transform condition of wavefield extrapolation operators , and improves on the wavefield extrapolation operator and so heightens the operation efficiency , and chooses the pspi that fits to the lateral variation of velocity to resolve the wave - equation , which lay a foundation of the theoretic study
首先，從波場延拓的單程波方程出發(fā)，研究了頻率?波數(shù)域的波場延拓算子之間的相互關(guān)系和轉(zhuǎn)換條件，并在此基礎(chǔ)上改進(jìn)了波場延拓方案和提高了運(yùn)算效率，選擇了適合于縱橫向速度劇烈變化的pspi方法求解波動(dòng)方程，為整個(gè)研究打下了理論基礎(chǔ)。 - 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。