difference operator造句
例句與造句
- Oscillation of second order difference operator
一類二階差分算子的振動性 - Approximate difference operator
近似差分算子 - Backward difference operator
后向差分算子 - Multiscale decomposition of divided difference operators and nonstationary subdivision schemes of b - spline series
樣條級數(shù)的非均勻細分算法 - In explicit depth extrapolation method of frequency - space fields , wavefield depth extrapolation is completed with convolution of short explicit difference operators and the wavefield
摘要在頻率空間域顯式疊前深度偏移中，波場深度延拓是通過顯式差分短算子與波場的空間褶積完成的。 - It's difficult to find difference operator in a sentence. 用difference operator造句挺難的
- Based on the study of the method of creating short explicit difference operators , a method for creating short explicit operators is presented , which is based on discrete smooth interpolation with control of phase - shift operator
基于對顯式差分短算子的設(shè)計方法的研究，提出了一種基于相移算子約束的離散光滑插值的構(gòu)造一維顯式短算子的方法。 - 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行了系數(shù)優(yōu)化，進一步提高了計算的有效性。 - The content of the study as follow : 1 to choice the ship form , mainly ship ' s overall size ; draft , according to design of shanghai deep - water port and development of container ; 2 . to deside the date of width ; depth ; path ; tract and sinkage through simulator tests ; 3 . to replenish and modify some date for channel design to very large container vessels in " design code of general layout for sea port " 4 . to study ship ' s turning area ; ship ' s stop distance the new and special content of the study as follow : 1 . statistics of path at the channel given by difference operators with the affections certain wind . currents . seas and other influences shows the path really needed under certain condition
并可在各類航道和水域的通航安全評估及操船方法，航跡帶寬度，航道寬度，航跡帶分布，船舶各種航行狀態(tài)時的下沉量研究中應(yīng)用。本課題研究的內(nèi)容： ( 1 )根據(jù)洋山深水港設(shè)計規(guī)劃和集裝箱船舶的發(fā)展趨勢，通過研究、分析、比較，選擇最合適的船型，尤其是船舶主尺度和船舶吃水。 ( 2 )在大量模擬研究情況下，得出進港航道所需的航道寬度和深度。 - A hybrid migration method , named " fourier finite - difference migration " , is a post - stack depth migration scheme . the downward extrapolation operator is split into three operators : one operator is a phase - shift operator for a chosen constant background velocity , another operator is the well - known first - order correction term , and the third operator is a finite - difference operator for the varying of the velocity function . phase - shift downward extrapolation and finite - difference downward extrapolation preserves the advantage of phase - shift method and finite - difference method
傅立葉有限差分(簡稱ffd )偏移算法是一種疊后深度偏移算法，其向下延拓算子是一種混合算子，包括三項：一項是處理常速的相移算子，一項是一階相移修正算子，最后一項是類似45度方程的有限差分算子，用來處理劇烈橫向變速。 - Author , secondly , starts from the approximate expandness of square root operator , perform mathematical calculations for finite difference operator in frequency - space domain , fourier finite difference operator in mixing domain ( frequency - space and frequency - wavenumber domain ) and general screen operator in mixing domain , compare and discuss their precision of their wavefield , adaptability for lateral velocity variations , computation efficiency and stability . thirdly , author , applies the steady variational reference slowness rytov approximation general screen wavefield extrapolation operator ( vrselrf ) in frequency - wavenumber domain , to the prestack and poststack forward modeling and depth migration
第二，從平方根算子的近似展開出發(fā)對頻率?空間域的有限差分算子、混合域(頻率?空間域；頻率?波數(shù)域)的fourier有限差分算子、混合域的廣義屏算子進行了推導(dǎo)并對其波場描述精度、對橫向變速的適應(yīng)性、計算效率和穩(wěn)定性進行了比較與評述。