环

The present production situation and market prospects of the main epichlorohydrin downstream products,such as epoxy resin,synthetic glycerol, chlorohydrin rubber ,and so on,are described.

论述了环氧氯丙烷的主要下游产品环氧树脂、合成甘油、氯醇橡胶等的生产现状、市场前景等，指出：我国氯碱行业应该重视这些环氧氯丙烷下游精细化工产品的开发，以促进我国环氧氯丙烷的发展。

The low molacular hydrogenated bisphenol A epoxy resin was prepared by the ring-closing reaction of the chlorohydrin ether and alkali and high molecular hydrogenated bisphenol A epoxy resin was synthesis by the addition polymeration of the low one and hygenated bisphenol A.

氢化双酚A和环氧氯丙烷在催化剂作用下开环反应生成了氯醇醚，而后加碱进行闭环反应，制备了低分子质量氢化双酚A型环氧树脂，再将其进一步与氢化双酚A等进行加聚反应，得到高分子质量环氧树脂。

The fluorescence anisotropy using steady-state fluorescence polarization method was measured for the solution of β-CD and cinchonine mixed and sonicated for 1h. The anisotropy values for the solution increased with the increase of the concentrations of β-CD, which implied the existence of some complexes of large size or nanotube structure. Many type of large size complexes formed between β-CD and Cin under high concentrations in gas phase were characterized by ESI-MS in moderate experiment conditions.

将辛可宁与环糊精的混合溶液超声1个小时后，用稳态荧光偏振方法测定溶液的各向异性值，发现随着环糊精浓度的增大，溶液的荧光各向异性不断增强，这意味着溶液中形成了大尺寸即纳米级结构的环糊精与辛可宁复合物；用温和的质谱测定条件表征发现高浓度的β-CD与辛可宁在气相中可形成各种类型的大尺寸复合物。

Level circular canal fixed under stator coil, 'lower circular canal' for short, is installed according to number of line bars to connect it with insulation draft tube via airproof parts, and to ensure coolant in line bar evenly distributed.

定子绕组下方配置的水平环管，简称下环管。按定子线棒数在环管上装设接口，经密封构件与绝缘引流管连接，以确保所有线棒中冷却介质的均匀分配。

When grinding the bearing ring, the outside diameter of it was taken as locating datum to process the outer raceway with the assistance of electromagnetic centerless clamper.

轴承环磨削过程中，以轴承环外径作为定位基准，在电磁无心夹具上磨削轴承环外滚道。

Then it proves a necessary and sufficient condition for anamalgamation of two 3-manifolds with toms boundary with no new incompressible surfaces.Lastly, with the help of the condition and the theorem about the classification of allautomorphisms of a torus, it is proveed that there exists infinitely many 3-manifolds each ofwhich contains no incompressible surfaces besides a torus.

最后，文章给出了以环面作为边界的两个3维流形在作融合积时不产生新的不可压缩曲面的一个充分必要条件，并将这个结果与关于环面到自身的自同胚类的分类的结果相结合，证明了本文的一个核心结论，即存在无穷多个互不同胚的3维流形满足除了一个环面以外不含有其他的不可压缩曲面。

It is of instructive significance to the design of robust controller when the closed-loop gain shaping algorithm is used to decide the magnitude of the model perturbation.

为了给出闭环增益成形算法的模型摄动形式，用小增益理论和H 混合灵敏度算法的结果进行推导，发现闭环增益成形算法的模型摄动形式与灵敏度函数的形式相同，该结论对用闭环增益成形算法设计鲁棒控制器时系统所能忍受的模型摄动大小的确定具有指导意义。

The algorithm shapes the closed-loop gain without selecting weighting functions in H∞ control algorithm. Its core is to determine the final shape of the transfer function of the closed-loop system, the robust PID controller is directly constructed using parameters having engineering sense. The algorithm guarantees fundamentally that the designed controller has fine control performance and robustness.

该算法避免了常规H∞控制算法中权函数的选择而对系统进行闭环增益成形，其核心是确定闭环系统传递函数的最后希望的形状，用闭环系统具有工程意义的参数直接构造出鲁棒PID控制器，从根本上保证了设计出的控制器具有良好的鲁棒性和鲁棒稳定性。

At last,we give the definition of FGT rings which is the extension of cogenerator rings.

在第二章中，我们由FGT -内射模的启发引入了CT -内射模的概念，在这一章我们知道ann -自内射环其实就是CT -内射环，只是ann -自内射环是从零化子的角度来讨论，而CT -内射是从循环无挠模的角度来进行讨论的，同时也给出了一些等价条件。

Furthermore,we consider the relations between the general linear groups and the corresponding BN-pairs and show that they satisfy a commutative diagram of groups.In Chapter 2,we study the structure of unitary groups over finite group rings R and its applications.

第一章考虑任意局部环上典型群的BN-对问题，构造了局部环上一般线性群、辛群、正交群的BN-对，并且证明了局部环上一般线性群与对应的BN-对之间满足群交换图关系。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。