multi- grid method造句
例句與造句
- Multi - grid method
多重網(wǎng)格法 - Then the explicit finite - volume method for the two - dimensional steady navier - stocks equations is studied . in order to prevent odd - even decoupling of the solution and oscillations near the shock waves , artificial dissipation is added . local time step , residue averaging , enthalpy damping and multi - grid method are used to accelerate the convergence during the five - step runge - kutta explicit time marching
在計算中，采用五步runge - kutta顯式時間推進，引進人工耗散項以克服中心差分固有的奇偶不關聯(lián)性和抑制激波附近解的振蕩，應用了當?shù)貢r間步長、殘值光順、焓阻尼、多重網(wǎng)格法等措施加速計算收斂。 - Three finite - difference methods , i . e . , stagger grid , implicit and explicit algorithms , are analyzed in detail . multi - grid algorithm is firstly introduced in elastic wave simulation , to solve for the stability problem inherent in stagger grid and implicit algorithm , also for the efficiency problem inherent in explicit algorithm , and the precision , stability and efficiency for simulation of elastic wave arc increased by multi - grid method . phase - delay method is provided to effectively absorb boundary reflection and increase efficiency for wave motion simulation , based on phase delay and amplitude decaying features along wave propagation
在水平分層介質(zhì)接收函數(shù)的波形反演研究的基礎上，本文系統(tǒng)闡述了非均勻介質(zhì)中彈性波傳播數(shù)值模擬常用的三種有限差分方法：顯式差分、隱式差分和交錯網(wǎng)格法，首次將多重網(wǎng)格算法應用于彈性波方程的數(shù)值模擬問題，克服了交錯網(wǎng)格法和顯式差分法穩(wěn)定性差，以及隱式差分法計算效率低的缺點，大大提高了彈性波數(shù)值模擬的精度、穩(wěn)定性和計算效率。 - A highly efficient numerical algorithm by using multi - grid method ( mgm ) is introduced to solve the three dimensional field distribution in the present paper . formulae of the restriction and prolongation in mgm computation is deduced , and a 3d program of mgm is accomplished , which can solve the field distributions in electron optical systems for various electrostatic lenses . the 3d field distribution in an electrostatic concentric spherical model is tested with mgm algorithm and an algorithm based on finite difference method ( fdm ) respectively . comparing these two results in view of computational efficiency and computational accuracy , it appears that mgm is superior to fdm in solving electrostatic field distribution for the electron optics problem . this paper shows that the 3d field computation using mgm greatly improves the computational efficiency of field distributions in electron optical systems and shortens the computational time
本文將一種高效率的數(shù)值計算方法? ?多重網(wǎng)格法引入三維靜電場分布的計算，多重網(wǎng)格法利用限制和延拓可迅速求得滿足精度要求的場分布.研究了求解各種靜電透鏡電子光學系統(tǒng)三維場分布的多重網(wǎng)格法程序，驗算了靜電同心球模型的三維場分布.通過與目前在場計算中常用的有限差分法進行比較，可以看出多重網(wǎng)格法的計算效率和計算精度優(yōu)于有限差分法.本文表明利用多重網(wǎng)格法計算三維場大大提高了場分布的計算效率，縮短了計算時間，因此為后續(xù)計算打下了良好的基礎 - It's difficult to find multi- grid method in a sentence. 用multi- grid method造句挺難的