例句與造句

1. 1 and ( a2 ) are fulfilled , and , in addition , the second - order derivative ( x ) exists and is bounded , and let then theorem 6 . 1 let { xn , n > 2 } be stationary na sequence with identical distribution , satisfing assumption of theorem 4 . 1 , then for all x c ( ( z ) ) , we have
   三2為同分布na隨機變量序列，滿足條件ai （ n ）和az ，進一步設川叫非降或非升，且存在口0 ，使得太以丫1 ，則對八x ）的任一連續(xù)點。有人一）一j （ x ）
2. From absorption spectra and the second - order derivative spectra , three absorption speaks of excitons were clearly resolved . at the same time , the first exciton absorption peak got stronger with decreasing nanocrystals size . blue shifts due to quantum confinement were observed obviously
   納晶吸收譜及二次微分譜的測量結果表明，納晶在室溫出現了三個激子吸收峰，第一激子吸收峰隨納晶半徑減小而增強，同時清楚地觀察到納晶受限導致的光譜藍移。
3. In this paper , these two methods are employed to consider three kinds of singular perturbation boundary value problems . in the first section , the existence of solution for a class of non - linear systems with three - point boundary problem is obtained by applying the differential inequality theory . in the second section , we use the differential inequality theory to discuss the non - monotone interior layer solution for one kind of singularly perturbed quasilinear boundary value problems with a turning point . in the third section , the diagonalization method is applied to study the existence of solution for a class of vector differential systems with two - point or three - point boundary problems . meanwhile , the asymptotic estimate of the solution as well as its first - order derivative and its second - order derivative is obtained
   在第一部分中，我們應用微分不等式理論證明了一類非線性系統(tǒng)三點邊值問題解的存在性；在第二部分中，運用微分不等式理論研究了一類帶有轉向點的擬線性奇攝動邊值問題的非單調內層解；在第三部分中，利用對角化方法研究了一類向量二點或者三點邊值問題解的存在性，并獲得解及它的一、二階導數的漸近估計。
4. But the conventional structural approximate analysis methods based on the first - order or the second - order derivatives of the stresses and the displacements of structures are not global , while an efficient global structural approximate analysis methods is helpful to decrease the number of the times of structural analysis , so the amount of calculation of structural analysis in the structural optimum design is reduced
   但是常用的基于結構應力、位移的一階和二階導數的結構近似分析不具備全局性，而有效的全局性的結構近似分析可有效地降低結構分析次數，從而可減少結構優(yōu)化設計中結構分析所需的計算量。
5. It's difficult to find second-order derivative in a sentence. 用second-order derivative造句挺難的