例句與造句

1. in this paper, we consider the subspace iteration method for solving large symmetric eigenproblems
   本文研究求解大型對稱矩陣特征值問題的子空間迭代法。
2. in order to get a finite element formulation to analyze singular heat flux fields, the weak form of basic equations and boundary conditions describing the 2d heat conduction eigenproblems is derived for the sectorial domains in the vicinity of the interfacial crack tip
   摘要為得到用于分析奇異熱流密度場的高效的有限元列式，針對不同材料中界面裂紋尖端的扇形區(qū)域，推導(dǎo)出二維熱傳導(dǎo)特征解問題的基本方程和邊界條件的弱形式。
3. to some eigenproblems, the corresponding ritz vectors always converge very slowly even sometimes do n't converge when ritz values have converged . so in order to improve the convergence of ritz vectors, firstly, refining-strategy is applied to the davidson method in this paper . the process restarts with the refined ritz vectors as the initial vectors, and then we get the refined block davidson method
   為了改善ritz向量的收斂性，本文首先在塊davidson方法的執(zhí)行過程中，運用精化策略，求出相應(yīng)的精化向量并將其作為初始向量進行重新開始過程，由此得到了精化塊davidson方法，并對精化塊davidson方法進行了收斂性分析；其次，本文將精化塊davidson方法結(jié)合收縮技術(shù)，提出了收縮的精化塊davidson方法。
4. and in the second part, we consider the following four inverse eigenproblems : the reconstruction of normal five-diagonal matrix by two or three ordered eigenvalues and corresponding eigenvectors, and the reconstruction of real symmetric tridiagonal matrix and irreducible real symmetric tridiagonal matrix by three eigenvalues and corresponding eigenvectors, some sufficient conditions for existence of unique solution to the problems are given here, and some necessary and sufficient conditions for the existence of both unique solution and solution ( not unique ) to the latter are also given
   第二個部分則討論四類矩陣逆特征值問題：在考慮給定的兩個或三個特征值次序的情況下構(gòu)造唯一的規(guī)范五對角線矩陣：由三個給定的特征值和相應(yīng)特征向量來構(gòu)造唯一的實對稱三對角線矩陣和不可約實對稱三對角線矩陣。文章中給出了前者有唯一解的充分條件以及后者有唯一解和有解(不唯一)的充要條件，并且分別給出了其中唯一解的表達方式。
5. It's difficult to find eigenproblems in a sentence. 用eigenproblems造句挺難的