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This paper presents the synthesis of three kinds of amine such as 2-(methyl- sulonyl)ethylamine,3-propylamine and 2--ethylamine via three different methods.

本文采用三种不同的方法合成了2-乙胺，3-丙胺，2-乙胺等3个含砜基伯胺；还合成了3--x-吲哚甲酸甲酯(x=5，6，7)， E-4-喹啉甲醛肟，E-6-氟-2-吡啶甲醛肟等三类芳环甲醛肟，其中吲哚类和吡啶类化合物未见文献报道。

Koblitz curves over a finite field of characteristic 2 and characteristic 3 disassembles k using prime element of simple Euclidean domain.To further improve the efficiency,presents an assumption of disassembling k based on prime element of quadratic Euclidean domain.

特征2和特征3的这类Koblitz曲线是以一次欧式环的素元来分解k，对此设想是否可以二次欧式环的素元为基底来二次分解k从而进一步提高效率。

Finally, this thesis presents an initial study on the splicing and alternative splicing mechanism of eukaryotic genes.

最后，我们对真核基因的剪接机制，以及选择性剪接的机制进行了初步的研究。

Chapter Five presents a pragmatic analysis of euphemistic expressions in English.

第五章对英语委婉表达进行语用分析，阐述其语用特征及语用功能。

This paper presents a method of evaluation reliability functions of electrical machines by the use of data analysis and statistical inference.

预测和评估需要电机的可靠性数据，获得数据有四种途径：实验室试验，运行现场观测，可靠性数据交换网和计算机数字仿真。

For some, family breakdown presents an opportunity for evangelism.

对一些人来说，家庭的衰落给福音主义一个机会。

This work also presents a computational model using the Surface Evolver program to analyze the stability of solder bridging for area array type package.

本论文接著利用Surface Evolver软体建立一计算模型以分析面积型态构装锡桥之稳定性。

This article mainly presents the design and relevant calculation of the hydraulic system in the mini excavator.

文章主要介绍小型挖掘机的液压系统的设计和有关计算。

Effective SEO ensures that your website presents exceptional value to the user experience, thereby appreciating in value to the search engines.

有效的徐确保您的网站介绍了非凡的价值，以用户的体验，从而在欣赏价值的搜索引擎。

There are totally five chapters in the paper. Chapter 1 is the introduc-tion,and extreme value theory and methods and modelling for returns fat tails are introduced systematically in Chapter 2.This chapter also presents mean excess function and de Haan's moment estimate to decide on the reasonable exceedance threshold. Chapter 3 describes in detail non-linear time series mod-els such as GARCH models and the corresponding statistical inferences,and it also gives modelling and statistical analysis methods for returns series. Chap-ter 4 uses the models in Chapter 2 to analyzes the daily returns for Shanghai complex index and Shenzhen complex index in the Shanghai and Shenzhen stock markets. Chapter 5 applies the models in Chapter 3 to the volatility analysis of the two stock indices returns.

论文总共五章：第一章是引言部分；第二章系统介绍了极值理论方法和收益率厚尾的建模方法，给出了平均剩余函数法和de Haan矩估计相结合的方法确定合理的超越门限；第三章详细论述了非线性时间序列模型GARCH类模型及其统计推断，并且给出了收益率时间序列波动的建模和统计分析方法；第四章利用第二章的模型对国内沪深两市大盘指数上证综指和深证综指日收益率数据分布的厚尾进行了实证分析；第五章将第三章的模型应用到两个股指日收益率时间序列的波动分析。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。