查询词典 A.N.

However, no examples of a copper-catalyzed combination of N-alkenylation and N-alkylation of amides had been reported.

然而，组合铜催化的酰胺N—烯基化和N—烷基化偶联生成二氢吡咯衍生物的反应未见文献报道。

Adding transition metals into the TiN films by arc ion plating (1) The hardnesses of theN films are higher that that of the TiN films, proving that the alloy hardening effect is a common phenomenon;(2) The structures of the alloyed films are determined by the added element properties such as covalent radius, electro negativity, free energy and lattice parameters of the MN compound;(3) theN film consists of a mixture of multi phases with high hardness but quite brittle, while the other MN films are composed of single phase with the fcc TiN structure and their hardesses, functions of the added amounts of the elements, manifest always a maximum at a certain M percentage.

一、将过渡金属M用电弧离子镀方法添加于TiN薄膜中：1。N薄膜硬度均高于TiN薄膜硬度，合金强化效应普遍存在；2。薄膜相结构决定于添加元素M的周期律信息，包括M的共价半径、电负性，及MN化合物的自由能、晶格常数等；3。N为多相混合结构，薄膜硬度高，但韧性差；其它N的相结构为TiN类型的单一fcc结构，薄膜硬度随M添加量变化并出现峰值；4。

By using polymerizable surfactants, the stability of the latex and water resistance of the film can be improved. Sodium monoalkyl maleates polymerizable surfactants, sodium monoalkylpolyoxyethylene maleates polymerizable surfactants and N-methyl-N-monododecylfumaroyl taurine polymerizable surfactants are synthesized, by using normal fatty alcohols, alkyl poly ether and maleic anhydride.

以直链脂肪醇、脂肪醇聚氧乙烯醚和马来酸酐为起始原料，设计合成了马来酸单脂肪醇酯钠盐A系列、马来酸单脂肪醇聚氧乙烯醚酯钠盐B系列、N-甲基-N-脂肪醇单酯富马酰基-牛磺酸钠D系列的可聚合乳化剂。

Methods: Sixty male rabbits with 8 weeks of age were randomly divided into the experimental group (n=36) and control group (n=24). The mandibles of rabbits in the experimental groups were induced to forward position by a functional appliance.

60只8周龄的日本大耳白兔，随机分成实验组(n=36)和对照组(n=24)，实验组动物每日24h戴用咬合前导矫正器。

A novel ligand, N, N'-bis (2-hydroxy-1-naphthylidene)-3-oxa-1, 5-diaminopentane , and its Zn , Ni , Co , Cu complex were synthesized. The compositions and structures of the ligand and its complexes were characterized by elemental analyses, MS , IR spectra, DTA-TG and molar conductivity.

合成了含萘酚环Schiff碱开链冠醚配体H〓L〓（N，N'-双-二甘醇二胺）及其过渡金属(Zn、Ni、Co、Cu)配合物，通过元素分析、质谱、红外光谱、摩尔电导对配体及配合物的组成、结构进行了详细的表征，对配体和配合物的溶液和固体荧光性质进行了研究。

First, we introduce and discuss the various methods of multivariate polynomial interpolation in the literature. Based on this study, we state multivariate Lagrange interpolation over again from algebraic geometry viewpoint:Given different interpolation nodes A1,A2 .....,An in the affine n-dimensional space Kn, and accordingly function values fi(i = 1,..., m), the question is how to find a polynomial p K[x1, x2,...,xn] satisfying the interpolation conditions:where X=(x1,X2,....,xn). Similarly with univariate problem, we have provedTheorem If the monomial ordering is given, a minimal ordering polynomial satisfying conditions (1) is uniquely exsisted.Such a polynomial can be computed by the Lagrange-Hermite interpolation algorithm introduced in chapter 2. Another statement for Lagrange interpolation problem is:Given monomials 1 ,2 ,.....,m from low degree to high one with respect to the ordering, some arbitrary values fi(i= 1,..., m), find a polynomial p, such thatIf there uniquely exists such an interpolation polynomial p{X, the interpolation problem is called properly posed.

文中首先对现有的多元多项式插值方法作了一个介绍和评述，在此基础上我们从代数几何观点重新讨论了多元Lagrange插值问题：给定n维仿射空间K~n中两两互异的点A_1，A_2，…，A_m，在结点A_i处给定函数值f_i(i=1，…，m)，构造多项式p∈K[X_1，X_2，…，X_n]，满足Lagrange插值条件：p=f_i，i=1，…，m (1)其中X=(X_1，X_2，…，X_n)，与一元情形相似地，本文证明了定理满足插值条件(1)的多项式存在，并且按&序&最低的多项式是唯一的，上述多项式可利用第二章介绍的Lagrange-Hermite插值算法求出，Lagrange插值另一种描述是：按序从低到高给定单项式ω_1，ω_2，…，ω_m，对任意给定的f_1，f_2，…，f_m，构造多项式p，满足插值条件：p=sum from i=1 to m=Ai=f_i，i=1，…，m (2)如果插值多项式p存在且唯一，则称插值问题适定。

In order to determine that,a conventional CG scheme is modified for our superlattices:First,apart from the former scheme,for the fixed electron density n,the eigenvalues and eigenfunctions are calculated,and then by using those,reconstruct the new n.

根据超晶格的基本方程，在固定电子密度 n下，求解了基本方程的本征值和本征函数，并由它们组成新的 n ，重复此过程直到得自洽解。

A novel composite-channel Al x Ga1- x N/Al y Ga1- y N/GaN high electron mobility transistor has designed and optimized.

对新型复合沟道Al x Ga1- x N/Al y Ga1- y N/GaN高电子迁移率晶体管进行了优化设计。

At ψ=30°. 2. To obtain 〓 from the background of a direct Auger spectrum N Because the total Auger electron yields are only about 10〓 of the backscattered electron yields in the N spectra, the backgrounds of the N spectra are mainly formed by the backscattered electrons.

由于N谱中俄歇电子的产额只占背散射电子产额的10〓左右，因此背景主要由来自样品的背散射电子构成，其中包含着与背散射电子能量分布有关的信息。

The whole thing registered N domain name, built N way station, it is one fashionable interest, gradually cross paragraph of time to bore, run those way station no longer, before paragraph time, I feel to begin serious doing to have a website.

前前后后注册了N个域名，建了N个小站，都是一时爱好，渐渐的过段时间就厌烦了，就不再治理那些小站了，前段时间，我觉得开始认真的做有一个网站。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐