例句與造句

1. theconvergence towards the weak solution is proved for one-dimensional space with initial and boundaryconditions by using some subtle techniques such as the estimate of spatial derivative, perturbationtheory and weak compactness
   通過使用對空間導(dǎo)數(shù)的估計、弱緊性和奇異攝動理論證明了有限元方法的收斂性。
2. only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives of the considered partial equations are estimated using a least-square curve fit on local clouds of points
   與傳統(tǒng)的網(wǎng)格方法不同，無網(wǎng)格方法的核心是用“點云”離散求解區(qū)域，并基于當?shù)攸c云離散結(jié)構(gòu)，引入二次極小曲面逼近空間導(dǎo)數(shù)。
3. in the dissertation, the unstructured dynamic mesh technique is investigated . full implicit dual-time temporal derivatives and cell-center finite volume method spatial derivatives are adopted to simulate unsteady flow fields of 2-d airfoil, 3-d wing and wing-body configuration
   在非結(jié)構(gòu)運動網(wǎng)格技術(shù)方面，本文發(fā)展了一種適用于解決非定常氣動力計算的、高效的、魯棒性較好的非結(jié)構(gòu)運動網(wǎng)格方法。
4. only clouds of points instead of grids are distributed over the computational domain and the spatial derivatives are estimated using a least-square curve fit on local clouds of points . the paper gives discrete form for euler equations on base of gridless method, and adopts five steps runge-kutta scheme for time-marching . the numerical results have been obtained for the 2-d flows over airfoils or multi-element airfoils using the method presented
   本文首先對無粘euler方程進行無網(wǎng)格離散，并運用顯式runge-kutta格式推進求解，成功地數(shù)值模擬了二維單段和多段翼型的繞流；在此成功的基礎(chǔ)上通過在euler方程的右端加入粘性項，使求解方程變?yōu)閷恿鱪avier?stokes方程，得到了翼型繞流，數(shù)值結(jié)果顯示出粘性的影響。
5. It's difficult to find spatial derivative in a sentence. 用spatial derivative造句挺難的