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This paper mainly studied the semilinear biharmonic elliptic equation with multi-singularity and critical exponcnt,in which we mainly studied,where N≥5,k∈N,(λ_1,λ_2,…,λ_k)∈R~4,(a_1,a_2,"",a_k)∈R~(4n) and 2~*=2N/N-4 is the critical Sobolev exponent.

文章主要在有界域Ω中研究了如下含多奇性的半线形椭圆型问题其中N≥5，k∈N，(λ_1，λ_1，…，λ_k)∈R~k，(a_1，a_2，…，a_k)∈R~且2~*=2N/N-4是临界的嵌入指数，由于Sobolev嵌入失去紧性，所以文章将通过集中紧原理得到正解的存在性。

In this thesis, we developed chiral proton N-O type ligands and employed them in the enantioselective addition of diethylzinc to N-diphenylphosphinoyl imines. The relationship between the structure of the ligands and the enantioselectivity was systematically studied. Furthermore, enantioselective butylation of N-diphenylphosphinoyl imines withBu〓Zn and enantioselective diphenylzinc addition to imine were also examined.

本文致力于亚胺的不对称催化有机锌试剂加成反应的研究：以手性质子型N-O配体为促进剂，对N-二苯基次膦酰亚胺进行不对称乙基锌加成反应而展开研究工作，系统地考查了手性配体的结构对反应的影响；另外，对N-二苯基次膦酰亚胺的不对称催化丁基锌加成进行了研究，并首次对亚胺的不对称苯基锌加成反应进行了初步探索。

For an n-variable function, the cardinal numbers of universal test sets for the two realizations were (n+4) and (n+5) respectively.

对于1个n变量的逻辑函数，两种实现结构下通用测试集的基数分别为(n+4)和(n+5)。

Methods :Sixty patients with CHF were randomly divided into routine therapy group(control group,n=18),which were administered cardiotonic,diuretic and vascellum expander;low dose atorvastatin group (n=20)and high dose atorvastatin group (n=22),which were supplemented by atorvastatin 10mg/day and 40mg/day separately, besides the routine therapy for 8 weeks.

60例CHF患者分为3组，对照组(n=18)常规予强心、利尿和血管扩张剂治疗，小剂量阿托伐他汀组(n=20)在前者基础上加用阿托伐他汀片(10mg/d)，大剂量阿托伐他汀组(n=22)则在基础治疗上加用阿托伐他汀片(40mg/d)，各治疗8周。

In section 4,we research the solvable groups of finite rank,and provethat the union set of all quasi-cyclic subgroups of G is a characteristic subgroup andthe Hirsch number hdoes not exceed n if G is a solvable group of rank n.Inparticular,for an arbitrary solvable torsion-free group G of rank n,we give theupper bound fof the derived length of G.

在第4节里，我们研究了有限秩的可解群，证明了这类群的所有拟循环子群构成它的一个特征子群，且对秩n的可解群G来说，其Hirsch数h≤n，另外，我们给出了秩n的无挠可解群的导出长度的一个上界。

In this research, the index for Hadley circulation intensity is defined as the maximum positive value of the zonal mean streamfunction occurring within the latitudinal zone of 0°~30°N, and index for NPO as normalized sea level pressure difference between the region (20°N, 180°~160°W) and the region (60°N, 180°~160°W).

本文选取0°~30°N区域里最大质量流函数来描述北半球Hadley环流强度随时间的演变，利用(20°N， 180°~160°W)和(60°N， 180°~160°W)区域平均的标准化海平面气压差代表NPO强度。

In Chapter 4, in the above system, the definitions of sensitive dependence on initial value, strong sensitive dependence on initial value and chaos set of a sequence of maps are put forward; Meanwhile, sensitive dependence on initial value of a sequence of maps is promited, and the concept of N - sensitive factor is also proposed; That at the local connected space λ_2/(N-1) is a N—sensitive factor, and a chaotic map containing strong sensitive dependence on initial value of a sequence of maps is proved.

第四章，在上述系统中给出了一列映射的初值敏感依赖、初值强敏感依赖和混沌集的定义；同时又对一列映射的初值敏感依赖进行了推广，提出了该系统下一个N-敏感系数的概念：证明了在局部连通空间中λ_2/N-1是系统的一个N-敏感系数；又证明了一列映射的混沌集蕴涵一列映射对初始条件具有强敏感依赖性。

According to the building blocks concept dicyandiamide N≡C-NH-C (NH〓=NH was selected as the precursor to improve the nitrogen content in the electrodeposited carbon nitride films.

以丙酮为分散介质，在阳极电沉积过程中制备得N含量为48％的氮化碳薄膜，此膜中有一定量的C=N和C≡N键，热退火使得C≡N减弱，C-N增强。

The samplings of water samples were made from Suzhou and Huangpu River (Station Beixinjing, Henan Road Bridge, Shiliupu Dock and Nenjiang Dock) for the determination of NH4-N, NO2-N, NO3-N, PO4-P and SiO3-Si by a Continuous Flow Analyzer.

于2002年4~7月在苏州河、黄浦江4个采样点采集水样，并用连续流动分析仪进行NH3-N、NO2-N、NO3-N、PO4-P、SiO3-S1等5个项目含量的测定。

A ring of integers derived from the set of all integers according to the following rule: Let N be an integer greater than 1, and A and B be two other integers; if N is a factor of A·B, then A is said to be congruent to a B modulo-N.

由全体整数的集合按下列规则产生的整数环：设N为大于1的整数，A和B是两个其它整数，若N是A·B的因子，则称A与B是模N的同余式。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷