例句與造句

1. We will say that a finite-difference method is convergent if this condition is satisfied .
   若滿足了這個條件，我們就說有限差分法是收斂的。
2. Measurement of marine sediment and modeling acoustic wave with a finite - difference method
   海底沉積物聲波現(xiàn)場測試和有限差分?jǐn)?shù)值模擬研究
3. Temperature field analysis of concrete filled circular steel tubes in fire by finite - difference method
   四面均勻受火下圓鋼管混凝土溫度場非線性分析
4. It may serve as effective finite - difference method s for hyperbolic conservation laws
   本方法使用方便，易于推廣，是求解雙曲型守恒律非常有效的差分方法。
5. Prestack migration is performed by reverse - time migration method based on maxwell ' s equations using time - domain finite - difference method
   疊前偏移用時間域有限差分求解麥克斯韋方程組的逆時偏移方法實現(xiàn)。
6. It's difficult to find finite-difference method in a sentence. 用finite-difference method造句挺難的
7. The authors first infered the boundary condition for line source , then realised the forward calculation with finite - difference method
   針對垂直有限線源，首先推導(dǎo)了線電流源的邊界條件，利用有限差分實現(xiàn)了三維地電場的正演。
8. The heat transfer of the wall and the internal thermal mass is considered in this model . the control equation can be solved by an implicit finite - difference method
   利用有限差分方法對該數(shù)學(xué)模型得到的控制方程組進(jìn)行離散,并對離散得到的差分方程的計算求解過程進(jìn)行了編程。
9. The test results demonstrate that this new finite - difference method can be efficient and sufficiently accurate . it may also be an effective and robust tool in other areas involving the numerical computation of partial differential equations
   實驗的結(jié)果表明，本文的方法具有高效、精確、實用的特點，并且可以推廣應(yīng)用到其他涉及偏微分方程數(shù)值計算的領(lǐng)域，具有廣闊的應(yīng)用前景。
10. Firstly , much effort is put into the theoretic analysis and numerical algorithm research . to calculate the mode profile of soi rib waveguide with jumps in the refractive index , a new full - vectorial finite - difference method ( fdm ) based on the lagrange interpolation of the field is presented
    由于soi材料中作為波導(dǎo)芯層的硅折射率很大，與作為包層的sio _ 2之間有很大的折射率差，這勢必對模擬數(shù)值算法的精度和邊界處理等方面提出了更高的要求。
11. Compared with the conventional finite - difference method on the fixed grid - size rectangular grids , the new method can be more cost - effective in complex models . numerical tests for both seismic modeling and reverse - time migration are performed on various theoretical models and a physical experiment
    用該剖分方法得到的網(wǎng)格在各速度層內(nèi)的空間步長是不同的，而全區(qū)域上的時間步長卻近于恒定，因此在復(fù)雜模型上，本文方法的計算效率要高于傳統(tǒng)的矩形網(wǎng)格差分方法。
12. In chapter 2 , the first and the second section give explicit explanations of how to use split - step fourier transformation ( ssft ) algorithm and finite - difference methods to solve nonlinear equation . a code table , in which a list of normalized transmission formula is included , is given to facilitate programming
    第二章，前兩節(jié)詳細(xì)介紹了如何用分步傅里葉變換算法和有限差分法實際求解非線性方程，并給出了求解光束、脈沖及脈沖光束的歸一化方程編碼表，供編程參考。
13. In the procedure , the column is first divided into a finite number of small segments in equal length . the deflection - curvature relation of each segment is determined using the finite - difference method . the final nonlinear algebraic equations are then obtained by means of the equilibrium condition for each segment
    運用這種方法時，先將長柱離散成若干等長的柱段，利用差分方法求得各柱段截面上的撓度與曲率的關(guān)系，再根據(jù)各截面上力及力矩的平衡條件，得到一組關(guān)于荷載與變形關(guān)系的非線性代數(shù)方程組，本文采用曲率增量法求解該方程組。
14. In the procedure , the column is first divided into a finite number of small segments in equal length . the deflection - curvature relation of each segment is determined using the finite - difference method . the final nonlinear algebraic equations are then obtained by means of the equilibrium condition for each segment
    運用這種方法，先將長柱離散成若干等長的柱段，利用差分方法求得各柱段截面上的撓度與曲率的關(guān)系，再根據(jù)各截面上外力與抵抗力的平衡條件，得到一組關(guān)于荷載與變形關(guān)系的非線性代數(shù)方程組；本文對該方程組采用載荷增量法進(jìn)行迭代求解。
15. In order to simulate the electro - optical performance of a liquid crystal cell an iterative finite - difference method is proposed in the present thesis to calculate the distribution of lc directors under an applied voltage . this new method is very stable and simple , and can give accurate results quickly as compared with the existing methods . when the parameters of a lc cell are unknown , a new model with three characteristic parameters is introduced to predict the electro - optical performance of the lc cell
    本論文在液晶光器件的模擬計算方面，提出了液晶指向矢空間分布求解的新型算法，與已有算法相比較，具有簡單穩(wěn)定、精度高和通用性強的優(yōu)浙江大學(xué)博士學(xué)位論文點;對于液晶材料參數(shù)未知的情況，提出了用于預(yù)測液晶盒電光特性的新型近似模型，分析了己有模型的參數(shù)確定問題，新模型提高了在預(yù)測不同厚度下液晶盒電光特性的精度;提出了液晶光波傳輸2x2擴展瓊斯矩陣的簡便形式。
16. 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。
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