结构单元

The relationship between the structure and the performance of polycarboxylate superplasticizer was analyzed. The respective function of the structure unit of principal and branched chain was discussed. And the progress of synthesis and molecular structure design of polycarboxylate superplasticizer was reviewed according to the difference in the structure unit of principal chain.

分析了聚羧酸系高效减水剂的结构与性能之间的关系，探讨了减水剂分子的主链结构单元与支链结构单元的功能与作用，并分类介绍了聚羧酸系的分子结构设计及其合成的研究与进展。

For distinctly understanding the mutual influence between the structural units, a series of compounds from five and six-membered C-N heterocycle substituting the tetrazine ring are designed. These several types of compounds are studied by means of the quantum chemistry calcualtions and discussed the influence of the structural units upon the main performance (heat of formation, density, velocity and pressure of detonation) and found out the best combination of performance.

为了更清楚的了解结构单元之间的相互影响，设计了六元氮杂环和五元氮杂环取代1，2，4，5-四嗪得到了一系列化合物，采用量子化学计算方法对它们进行了详细的理论研究，讨论了各种氮杂环的改变对四嗪类化合物性能(包括生成热、密度以及爆速和爆压等)的影响，并找出爆轰性能较好的结构单元组合。

It was found that the section was brittle. The scales of the pangolin were composed of the very thin prismy construction units and the folded units. The scales of the pangolin included such trace elements as S,Si,Fe,Al and Ca, besides the element of C,H,O and N. There were small amount of P element in the internal layer of the pangolin's scale.

结果表明冲击断口为脆性断口；穿山甲鳞片是由极细的棱柱结构单元和叠片结构单元混合形成的；穿山甲鳞片除含有大量的碳、氢、氧及氮元素外，硫、硅、铁、铝、钙5种元素的含量也相对较高，鳞片内层中含有少量的磷元素。

Then the structure unit of hexangular lattice is found according to the principle of invariable symmetry. Renormalization transformation is processed when we regard the structure unit and the growth model as graphs before and after transformation respectively. After choosing the11thermodynamic function fugacity as parameter, we can write out the partition functions before and after transformation and the formula of renormalization transformation. At the same time, we also work out the fixed points of transformation.

然后根据对称性不变的原则，从整体晶格中选取结构单元，把结构单元和生长模型分别作为重整化变换前、后的图形来进行重整化变换，选取热力学函数易逸度为参量，写出了重整化变换前后的配分函数和重整化变换关系式，求出了这一变换的不动点。

Using the method of orthogonal design of experiment,the influences of the configuration of the needle surface nonsmooth structure unit,its interval,depth,and diameter or width on the drag on the injector needle against the human skin were investigated,and the influence order of factors and their optimal levels were determined.

运用试验优化技术，找出了针头表面几何非光滑结构单元形态、结构单元深度、间距及直径对注射时针头壁与皮肤间摩擦阻力的影响规律，分析了影响因素的主次和最优水平。

In the structures of these complexes, zinc can act as the vertex of the networks in various styles: single atom; dicarboxylate, tricarboxylate or tetracarboxylate bridged binuclear SBU ; and octacarboxylate bridged trinuclear SBU.

在这些配合物的结构中，锌离子可以按多种形式作为网络结构的顶点：单原子，双羧基、三羧基或四羧基桥连的双核锌次级结构单元，八羧基桥连的三核锌次级结构单元，再与配体组装成不同的配位聚合物网络。

Based on the methylation analysis of the glycan and 〓C NMR spectroscopy of the glycoconjugate, one of the probably structure of repeat unit of the glycoconjugate was estimated as follow:- [→4 βGlcp (1→4)βGlcp (1→4)βGlcp (1→4)βGlcp (1→4)βGlcp (1→4)βGlcp (1→4)-βGlcp (1→4)βGlcp (1→] 〓→4)βGlcp (1→3)βManp (1→3)βRhap (1→3)βRhap (1→3)-↓↓βGalp βArap -βRhap (1→3)βRhap 1→ GFPE, which was the extracellular polysaccharide, was sulfated and the production was called GFPEs, which sulfated radicals content was 20.02%.

以甲基化反应及核磁共振的方法分析糖链结构，假设糖链GFPI-g具有重复结构单元，其可能的一种重复单元结构为：〓对灰数花胞外多糖GFPE的硫酸化修饰产物命名为GFPE-s，硫酸根含量为20.02％。

It is one of the best methods to study sedimentary geology for outcrops.

结构单元分析就是结合古流数据对露头横剖面进行岩石相、界面和结构单元的划分，以揭示沉积体系的三维展布，恢复沉积体系的演化史，它是目前研究露头沉积地质的最佳方法之一。

The thesis recommended the theory of minimum strain energy, which says the total structural strain energy can be changed by the increase and decrease of constraint number.

本文介绍了通过在结构单元上增加或者减少不作功的不同约束点，可以改变结构单元应变能的大小的应变能极小原理。

Is a novel entirely of inter前一单元tation, the attempts of several characters -- Miss Rosa, Mr. Compson, Quentin, and Shreve -- to explain the past, characterized by involutions of narrative structure which ex前一单元ss corresponding complexities of meaning.

完全是一种跨前一单元诊察，企图几字--罗莎小姐，张康普，昆廷，而shreve--解释过去，它的特点是带有叙事结构当然前一单元SS的相应复杂的含义。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失