电子异构的

The properties of single-chain and pauci-chain polystyrene microspheres and recent results on the electron microscopy and selected area electron diffraction of single-chain monocrystals of polyethylene oxide, isotactic polystyrene, cis-1, 4-polybutadiene and guttapercha are presented and discussed.

介绍和讨论了单链和寡链聚苯乙烯玻璃体微球的性质以及聚环氧乙烷、全同立构聚苯乙烯、顺-1， 4-聚丁二稀、反-1， 4-聚异戊二烯单链单晶电子显微镜和选区电子衍射观察的最新结果。

The development of E Business is hindered by distribution of data, isomerism of developing platforms, miscellany of Web technologies and lack of correspondence between business logic and data description.

数据的分布性、开发平台的异构性、WEB后台技术的多样性及业务逻辑定义和数据属性描述的不一致性阻碍了电子商务的发展。

Secondly, femtosecond time-resolved studies using fluorescence depletion spectroscopy were performed on Rhodamine 700 and Oxazine 750 in solutions to study the ultrafast dynamics, such as vibrational relaxation and the energy transfer from the solute to solvent.

本文的主要内容是利用飞秒时间分辨荧光亏蚀光谱探测技术对液相体系中的染料大分子在不同条件下的激发态振动弛豫、取向弛豫和分子间碰撞传能等超快动力学过程进行了研究，分析得到了这些超快过程与体系温度和溶剂性质之间的关系，同时为进一步研究DNA、蛋白质等生物分子体系的电子转移、质子转移、能量传递以及光致异构化等反应过程打下了基础。

The equilibrious geometries and electronic structures of possible isomers of Si4N4 clusters are studied by using density functional theorywith basis sets 6-31G*.17 possible isomers are obtained.

用密度泛函理论中的杂化密度泛函B3LYP方法，在6-31G的水平上对Si4N4团簇的可能结构进行了几何结构优化和电子结构计算，得到了可能的17个异构体。

In this thesis, two classes nonquaternary Cholinesterase Reactivators (1,2,4-oxadiazole and a -ketothio Hydroximic Acids derivatives ) and some clinical therapy used reactivators added to almost 40 cases have been caculated by using Comparative Molecular Field Analysis,ab initio and molecular mechanism methods. The characteristics of the molecular orbitals and the quantitative structure-activity relationship have been investigated.

本文利用比较分子力场法，量子化学从头算法，分子力学及计算化学回归分析等方法，对1，2，4-oxadiazole类非季铵肟胆碱酯酶复能剂，α—酮硫代异羟肟酸酯复能剂及部分现临床使用的复能剂，近40个化合物进行了计算，分析和研究了其电子结构和几何结构特征，建立了定量构效关系方程，得到了以下一些有意义的结果。

The properties of single chain and pauci chain polystyrene microspheres and recent results on the electron microscopy and selected area electron diffraction of single chain monocrystals of polyethylene oxide, isotactic polystyrene, cis1,4 polybutadiene and gutta percha are presented and discussed.

介绍和讨论了单链和寡链聚苯乙烯玻璃体微球的性质以及聚环氧乙烷、同立构聚苯乙烯、－，4－丁二稀、－，4－异戊二烯单链单晶电子显微镜和选区电子衍射观察的最新结果。

The correlation of such ultrafast process with the system temperature and property of solvents is analyzed, which is useful for the further study about the ultrafast process of DNA, protein and other biological molecules, such as intra- and intermolecular electron, proton and energy transfer and photoisomerization.

本文的主要内容是利用飞秒时间分辨荧光亏蚀光谱探测技术对液相体系中的染料大分子在不同条件下的激发态振动弛豫、取向弛豫和分子间碰撞传能等超快动力学过程进行了研究，分析得到了这些超快过程与体系温度和溶剂性质之间的关系，同时为进一步研究DNA、蛋白质等生物分子体系的电子转移、质子转移、能量传递以及光致异构化等反应过程打下了基础。

Femtosecond time-resolved studies using fluorescence depletion spectroscopy were performed on the vibrational relaxation; orientational relaxation and the intermolecular energy transfer of dye molecules in solutions under different conditions. The correlation of such ultrafast process with the system temperature and property of solvents is analyzed, which is useful for the further study about the ultrafast process of DNA, protein and other biological molecules, such as intra- and intermolecular electron, proton and energy transfer and photoisomerization.

本文的主要内容是利用飞秒时间分辨荧光亏蚀光谱探测技术对液相体系中的染料大分子在不同条件下的激发态振动弛豫、取向弛豫和分子间碰撞传能等超快动力学过程进行了研究，分析得到了这些超快过程与体系温度和溶剂性质之间的关系，同时为进一步研究DNA、蛋白质等生物分子体系的电子转移、质子转移、能量传递以及光致异构化等反应过程打下了基础。

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