概述

This work, concentrated on the asymmetric allylation of aldehydes controlled by different chiral auxiliaries prepared from rotational pure tartaric acid, can be divided into three parts.The first part aims to review the developments of chiral drugs and asymmetric synthesis, from which derived the present research topic backgrounds and works.Synthesis and applications of allylation from aldehydes are the second part of the thesis. By optimizing the reaction conditions, such as solvents, temperature, time and chiral auxiliaries like N,N\'-dibenzyl tartamide, N,N\'-p-dimethylphenyl tartamide, N,N\'-o-dimethylphenyl tartamide, N,N\'-o-dichlorophenyl tartamide, N,N\'-a-dinaphyl tartamide, N,N\'-dicyclohexyl tartamide and N,N\'-diphenyl tartamide, ideal experimenttal conditions are obtained according to HPLC monitoring, as well as the auxiliaries\' recoveries experiments. Starting from benzaldehyde and 3-bromopropaldehyde, N,N\'-dibenzyl tartamide is considered the best auxiliary in this reaction.

本文介绍了醛的不对称烯丙基化反应，以光学纯酒石酸为原料，研究了不同构型手性配体在醛的烯丙基化反应中的立体选择性，全文共分三部分十个章节：第一部分对当前手性药物和手性技术进行了概述，并由此展开了本文的研究背景和任务；第二部分为有机合成部分，对醛的不对称烯丙基化反应进行了深入探讨，以苯甲醛为原料对反应条件进行优化，在优化的反应条件下对制备的七种可回收手性酰胺配体(N-苄基酒石酸二酰胺、N-对甲苯基酒石酸二酰胺、N-邻甲苯基酒石酸二酰胺、N-邻氯苯基酒石酸二酰胺、N-a-萘基酒石酸二酰胺、N-环己基酒石酸二酰胺和N-苯基酒石酸二酰胺)进行筛选，优化配体回收实验条件，最终确定出N-苄基酒石酸二酰胺在苯甲醛的不对称烯丙基化反应中具有较大优越性，结晶回收的手性配体光学纯度保持不变。

The problem of statistical discission in finite mixing distribution model and linear model is discussed in this thesis,including:Firstly,in the aspect of hypothesis test,we mainly discuss the general homogeneous hypothesis testing problem.

现将主要内容概述如下：一、在假设检验方面，本文主要研究了正态混合分稚模型的同构性检验问题，也就是说，检验观测数据究竟是来自单一的正态总体，还是混合正态总体。

This article believed that, under the new class sign idea teacher role dislodgement and the quality renewal are an eternal process, the role dislodgement and the quality renewal is in the identical developing process unification of opposites two aspects, the two is a condition mutually, complements one another.

本文在综合各家理论研究的基础上，联系中学语文教学实际，概述了教师角色变位的主要形式及素质更新的基本内容，并运用马克思主义哲学的基本原理初步探讨了教师角色变位和素质更新的辩证法。

This article in synthesizes various fundamental research in the foundation, the relation middle school language teaching reality, has outlined the basic content which the teacher role dislodgement main form and the quality renews, and has discussed the diagnostic method initially using the Marxist philosophy basic principle which the teacher role dislodgement and the quality renews.

本文在综合各家理论研究的基础上，联系中学语文教学实际，概述了教师角色变位的主要形式及素质更新的基本内容，并运用马克思主义哲学的基本原理初步探讨了教师角色变位和素质更新的辩证法。

This article in synthesizes various fundamental research in the foundation, the relation middle school language teaching reality, has outlined the basic content which the teacher role dislodgement main form and the quality renews, and has discussed the diagnostic method initially using the Marxist philosophy basic principle which the teacher role dislodgement and the quality renews.

本文在综合各家理论研究的基础上，联系中学语文教学实际，概述了教师角色变位的主要形式及素质更新的基本内容，并运用马克思主义哲学的基本原理初步探讨我国基础教育课程改革正在深入发展，有关新课改下教师角色变位和素质更新的讨论也随之日趋热烈。

First, this paper introduces the conception and content of configuration management, summarizes the defects of traditional configuration management method, and dissertate the necessity and feasibility of apply information technology into configuration management.

本文首先介绍了技术状态管理的基本体系，概述了传统的技术状态管理手段的不足，遵循ISO标准和我国军用航空标准的要求，阐述了采用信息技术进行技术状态管理的必要性和可行性。

This article takes the famous figures in the history of science as its main thread,and gives a brief summary of the main ideas and achievement of modern philosophy and natural science at its different period of develoqment,and mainly examines the dominative effect of philosophy uqon natural science.

本文以科学史上的杰出人物为线索，概述了近代哲学和自然科学在不同发展时期的主要思想和成就、着重考察了哲学对自然科学的支配作用。

The paper outlined the basic structure of landforms, analysed the external agencies which acted on the modern landforms, and discussed the geologic structure and the surface material which affected the Iandforms in the Drung river basin.

文章首先概述独龙江流域的地貌基本形态结构，分析现代地貌作用的外营力，讨论地质构造和地表物质对研究区地貌形成的作用和影响。

Meanwhile, the econometric models and testing methods used in researching this problem is also compared and analyzed in this article.

同时，本文还对研究金融发展与经济增长关系采用的计量实证检验方法进行了概述与比较。

Ectodermal dysplasias: An overview and update of clinical and molecular-functional mechanisms.

外胚层发育不良：临床分子功能机制的更新和概述 _文摘译讯_医脉通，www.medlive.cn

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。