部分

The research which is the important part of the tunable erbium-doped fiber laser is composed of two main parts: 1. the gain part of the tunable erbium-doped fiber laser, which in fact is an erbium-doped fiber amplifier, its output characteristics are discussed both in theory and experiment, and the differences are also discussed between theory and experiment; 2. the saturated absorber part of the tunable erbium-doped fiber laser, also the part to narrow the line width of the fiber laser. The line-width narrowing mechanism in fiber laser induced by unpumped Er-doped fiber is presented from the aspect of coupling wave equation, and the main factor is considered as the standing wave induced by interference. The line-width is narrower when the standing wave is stronger, and the narrowing effect disappears with the disappearance of the standing wave. In the experiment, when adding a Faraday mirror in the laser cavity to remove the standing wave , the narrowing effect disappears. So the theory is proved by the result of the experiment.

本课题的研究内容是集成光学声光可调谐掺铒光纤激光器的重要组成部分，主要分两部分：1、声光可调谐掺铒光纤激光器中增益部分的研究，相当于对掺铒光纤放大器的研究，理论上对掺铒光纤放大器的输出特性进行分析，实验上实现了掺铒光纤放大器系统，并将实验数据与理论计算数据进行对比，分析了误差产生原因；2、声光可调谐掺铒光纤激光器中饱和吸收体部分的研究，即压窄光纤激光器输出线宽的研究，从耦合波方程出发，理论上解释了未泵浦掺铒光纤压窄光纤激光器线宽的原理，分析了影响该作用的主要因素是未泵浦掺铒光纤中相对传输的光干涉形成的驻波：驻波越强，压窄效果越好，相反当没有驻波时，没有压窄效果，在实验上通过在激光器腔内加入法拉第旋转镜使驻波消失，同时压窄效果消失，从而验证了理论分析的正确性。

In the tune "the old city" represents Beijing, the music take the Peking opera as the source material, will divide the slow movement and the musical beat two parts, the slow movement sub-system will be persuasive the exquisite Peking opera melody to further process, causes it music, has displayed the urheen timbre delightful gentle performance special skill, will listen both to express feelings, the Beijing style to be full exquisitely, and will not lose the sonorous powerful place, music mood fluctuation repeat swings, the change will be careful, musical beat partial melodies sprightly smooth, by the urheen continuously the fast figure and the clear bright timbre, will entrust with this section of musics fresh and the active characteristic, but long will draw out a syllable appearance, also will then cause it alone lyricism, this music from differentThe angle expresses thinks of the ancient exquisite feeling, takes to the people infinite province to think with recalls.

曲中&古城&意指北京城，乐曲以京剧为素材，分慢板与流水板两部分，慢板部分系将婉转优美的京剧唱腔进一步加工，使之更加音乐化，发挥了二胡音色甜美柔和的演奏特长，听来既抒情优美、京味十足，又不失铿锵有力之处，音乐情绪起伏迭荡，变化细致，流水板部分旋律明快流畅，以二胡的连续快速音型和清脆明亮的音色，赋予本段音乐清新而活跃的特色，而长拖腔的出现，则又使之独具抒情性，本乐曲从不同角度抒发思古幽情，带给人们无限的省思与回忆。

At last,a convergent and general protocol to marine natural product,as demonstrated by the enantioselective total synthesis of malyngamides O,P,Q,R, 5"-epi-Q and 5"-epi-R bearing terminal vinylic chloride structure,was developed in detail.E,(7S)-7-methoxytetradec-4-enoic acid was prepared using the above described Johnson-Clainsen rearrangement,the terminal vinyl chloride was constructed using Wittig reaction as key step,the pyrrolidone derivative was constructed using L-serine as natural chiral pool.Starting from the synthesis of malyngamides O and P to explore the general route,an aldol reaction of methyl acetate with the vinyl chloride part in the presence of LDA gave the skeleton of amine portion,followed by amidation with the fatty acid finished the synthesis of malyngamide P.

先以malyngamides O和P为试点探索通用合成路线，将乙酸甲酯和烯氯部分在LDA存在下进行aldol反应得到氨部分的骨架，再将手性不饱和脂肪酸和氨部分进行酰胺化反应完成了malyngamide P的合成，将P在碱性条件下进行烯醇甲基化反应完成了malyngamide O的全合成。

Model HL6000C harvester one rice wheat pairs of person who charges track half feed the entering type combined harvester, It have horsepowers of heavy, efficiency high, adaptable high humidity paddy field person who gather in merit, But because structure its complicated, exist many questions and drawbacks but also in the course of using actually, Through cut this text to it sets of part urge systematic analysis and calculate, find out existing problem its and put forward to among them some solution of problem, In order to improve it cut sets of quality of part, improve overall quality of harvester further.

HL6000C型收割机是一种稻麦双收履带式半喂入型联合收割机，它具有马力大、效率高、可适应高湿度稻田收割等优点，但由于其结构复杂，在实际应用过程中还存在不少问题和弊端，本文通过对其割台部分驱动系统的分析和计算，找出其存在的问题并提出对其中部分问题的解决方案，以提高其割台部分的质量，从而进一步提高收割机的总体质量。

It consists of two main parts, the first containing moral admonitions to several Christian churches in Asia Minor, and the second composed of extraordinary visions, allegories, and symbols that have been the subject of varying interpretations throughout history.

它有两个主要部分，第一部分包括对小亚细亚几个基督教会的道德告诫，第二部分是历史上曾作过各种解释的一些异常的幻象、寓言和象征。

It consists of two main parts, the first containing moral admonitions to several Christian churches in Asia Minor, and the second composed of extraordinary visions, allegories, and symbols that have been the subject of varying interpretations throughout history.

它有两个主要部分，第一部分包括对小亚细亚几个基督教会的道德告诫，第二部分是上曾作过各种解释的一些异常的幻象、寓言和象征。

In the first part there is an introduction in brief to the history and present market status of the Chinese motorcycle industry; In the second part, there is an introduction in brief to the international motorcycle market, analyzing the marketing characteristics of the Chinese motorcycle export business, find out the key characteristics which influence the Chinese motorcycle export; In the third part, through the analogizing and analyzing on the Chongqing motorcycle export, find out the main problems which have hindered the expansion of the Chongqing motorcycle export; In the forth part, based on the analysis of the China"s entry to "WTO which will influence the motorcycle and its spare-part industry, make out some new basic strategy and further countermeasures to the expansion of the Chongqing motorcycle in overseas market.

首先，在第一部份中简要介绍了我国摩托车工业的发展历史和市场现状，；在第二部分中，介绍了国际市场的摩托车贸易现状，对中国摩托车出口的国际市场特点进行研究，分析影响中国摩托车出口的各类因素；在第三部分中，通过对重庆市摩托车近期出口现状的分析，指出扩大重庆摩托车出口所面临的瓶颈问题；第四部分，在对加入&WTO&以后我国摩托车工业可能受到的影响进行分析的基础上，为扩大重庆摩托车产品的出口提出一些新的思路。

Where a valuation has to be apportioned, and particulars of the

一种货物的任何部分保险价值是该货物全部保险价值中占该部分货物价值同全部保险价值的比例部分。

This article plans from the following three parts to carry on the discussion: The first part discusses the Chinese negotiable securities dispute to arbitrate system's outline and the present situation, this part is for the purpose of through arbitrating the question elaboration which to the Chinese negotiable securities dispute system's historical development and the development present situation and exist in reality, then arbitrates the system to the Chinese negotiable securities dispute to carry on the analysis and the localization, lays the foundation for the later word elaboration.

本文拟从以下三部分进行探讨：第一部分讨论中国证券纠纷仲裁制度的概述和现状，本部分旨在通过对中国证券纠纷仲裁制度的发展历史和发展现状及在实践中存在的问题的论述，进而对中国证券纠纷仲裁制度进行分析和定位，为后文的论述奠定基础。

Academic analyze and plentiful experiments are done to design the ultrasonic saddle of ultrasonic suspended gyroscope, power supply of ultrasonic, gyroscope rotor, theory analyze and design have been done in magnetic field circumrotating part and angle acquisition system.

通过理论分析和大量的实验，设计并制作了超声陀螺仪的超声鞍部分、超声激励电源部分和陀螺球，对磁场加转部分和角度读取系统进行了原理分析及设计。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。