进行选择

As a result,the paper selected spatial structure of urban recreation as a study object to expound its possibly ideal spatial forms. The article presents its frame as below: Firstly,through comprehensive analysis of urban recreation,urban leisure and tourism,the article clarifies the basic connotation of the concept of recreation; namely, recreation invariably refers to outdoors activities in spare time with purpose of seeking self-contentment to the greatest extent,which attach importance to their social effect.

因此，本文选择城市游憩空间结构作为研究对象，对城市游憩空间的合理结构进行了研究与探讨，具体内容为：通过对游憩、休闲和旅游的三种基本现象进行比较分析，廓清游憩概念的基本内涵：闲暇时间内发生的各种户外活动，这种活动的目的是最大程度的满足自我，十分注重社会效应。

The first part states in a comprehensive way the research on Zhou Zuoren so as to define the purpose, methodology and significance of the dissertation. The second part analyzes the experience of Zhou's self-culture creation from a personal angle-Yue culture in Zhejiang gave Zhou a perceptual knowledge of folklore, while the idea of world folklore gave him a rational cognition of folk' culture. The combination forms a dual folklore. The third part observes Zhou Zuoren's examination of literarure from folklore's perspective as well as its pioneering significance. The fourth part explores in a further way Zhou's perspective of folk culture, and analyzes the method he has established to conduct literary criticism from the angle of folklore as well as his research on Chinese Culture. The fifth part analyzes the impacts folklore theory and folk culture have on the formation of Zhou' literary ideas, focusing more his folklore interpretation and humanism perspective about the origin and hist ory of literature, also his literary aesthetic standards about "ordinary humanism" and "loving amusement" from the position of folklore. The sixth part expounds Zhou's achievement in combining literature and folklore and explores the consistency of their focus on human, thereby presenting a complete picture of Zhou's literature. The last part generalizes the revelation drawing from the research done in this dissertation.

本文分为六章：第一章综述周作人研究的历史与现状，从而确定本文的研究目的、方法及意义；第二章从社会、时代背景、区域文化传统和个人文化选择的角度，阐释周作人选取民俗学视角观照文学的原因，侧重分析周作人自我文化建构的心路历程——浙江越文化传统的浸润给周作人以民俗学的感性认识，而世界民俗学的理念赋予他注重民间文化的理性精神；第三章考察周作人的民俗学研究及先锋意义；第四章进一步探讨周作人的民俗文化观，分析他确立的从民俗文化角度进行文学批评的方法，兼及他从民俗学视角进行的中国文化研究；第五章分析民俗学理论及民俗文化观在周作人文学思想生成中的影响，着重论述周作人关于文学起源和文学发展史的民俗学阐释、文学的民俗人性观，以及从民间立场出发所具有的"平凡的人道"、"有情的滑稽"等文学审美原则；第六章从创作实践方面，探讨周作人文学作品的民俗文化意蕴，进一步论述周作人将文学与民俗结合在一起的实绩，并揭示二者以"人"为核心的内在精神的一致性，从而呈现出周作人较为完整的文学风貌；最后是余论，指出这一研究的启示。

Based on generator self excitation theory and the characteristics of black-start, we choose this simple method to be the criterion of generator self excitation problem in black start. Later, simulation of hydraulic generator self-excitation study is given.

从适用於黑启动快速这一特点出发，在已有的方法中选择了一种简单的近似方法来作为黑启动研究中自励磁产生与否的判据，从自励磁现象本质出发进行了阐述，并对水轮机组自励磁产生的暂态过程进行了仿真计算。

Before the experiments, the selection of grass seed, the semination density and the amount of fertilizer were analyzed in terms of theory and practice.

在了解地膜物理性能的基础上，在内蒙古高速公路和北京郊区进行了地膜的野外应用试验，在野外试验前，对草种的选择以及播种密度和施肥量进行了理论及实验分析。

Recent years as development of the computer and software, it becomes reality using numeric simulation to research grouting in clay. Using the software of PFC2D, the grouting in clay is lucubrated and such achievements are reached: Grouting technologies in existence grouting material and serosity are studied and rational methods are put forward in choosing grouting technology and serosity.(2) Base on numeric simulation biax test a method is explored to simulate clay with PFC2D.(3) A method is explored to simulate grouting using PFC2D.(4) The relation between serosity pressure and diffuseness of grouting in clay with different initial stress is studied.(5) The stress transformation of clay is studied during grouting.(6) The stress distribution is studied under different serosity pressure.(7) The normal stresss and shear stresss at any section are studied.

近年来随着计算技术的发展，使得采用数值模拟的方式研究均质土体中的注浆成为可能，本文则利用离散元程序PFC2D对均质土体中注浆进行了研究，主要做了以下几方面的工作：(1)研究了现有注浆加固技术、注浆材料以及浆液的性质，阐述了合理选择注浆方式以及浆液的方法；(2)采用数值双轴实验，探索了应用离散元模型模拟土体的方法：(3)探索了采用颗粒流程序进行注浆数值模拟的方法途径；(4)研究了在粘土中注浆不同侧向土压力条件下浆液扩散范围与注浆压力规律；(5)研究了注浆过程中不同阶段土体中压应力的变化；(6)研究了不同注浆压力对土体应力分稚的影响：(7)研究了注浆过程中土体中任一截面处正应力与剪应力的对比关系。

The introduction deals with these pieces composed before Beethoven so as to get the conclusion about the historical background of how specific color of C minor came into being. Chapter One studies three C minor piano pieces composed by Beethoven (Sonata No.5, Sonata No.8, Piano Concerto No.3), analyzes these first movements in detail from the perspective of the binary conflict, dotted rhythm, diminished seventh chord and the use of repeat notes. Chapter Two focuses on the similar backgrounds concerning compositions, general idea, theme design, heroic characters, etc. All of these characters could explain that how Beethoven understood and used the to...更多nality of C minor.

随后选择贝多芬1800年之前创作的三部C小调钢琴作品(《第五钢琴奏鸣曲》、《第八钢琴奏鸣曲》、《第三钢琴协奏曲》)进行研究，并着重第一乐章，从二元冲突、附点节奏、减七和弦、重复音的运用等方面进行具体分析，归纳三部作品在创作背景、总体构思、主题设计、英雄性格等方面的相似之处，从而解释贝多芬对C小调调性的理解与运用以及这三部作品对贝多芬英雄主义风格形成的影响。

In order to production needs, the structure of the pressure vessel, the design of the way, bringing them in line with customer demand factory, the design of the following: First, pressure vessels of the board of the design; two, shell hole size, location of the design; 3 , Welding technology of choice.

为了生产需要，对压力容器的结构、管程进行设计，使之符合工厂客户要求，进行了以下设计：一、压力容器管板形式的设计；二、筒体开孔大小、位置的设计；三、焊接工艺的选择。

Based the structure and function of Yangtze River Estuary Ecosystem, the energy expenditure of shorebird community staging at Yangtze River Estuary and the production of macro zoobenthos community were studied in this dissertation.

本文以长江河口湿地生态系统的结构和功能为基础，对鸻鹬群落在长江口地区中途停歇期间的能量需求和栖息地选择和利用进行了研究，探讨了底栖动物作为鸻鹬群落饵料的状况，并根据鸻鹬群落和底栖动物群落能量流动特点，构建了Stella计算模型，对鸻鹬群落中途停歇长江口期间所需要的栖息地面积进行了估算和探讨，以期为区域发展和鸻鹬栖息地保护提供依据。

It reveals that there are several types of phytoliths in bamboos including fan-shape, long-saddle, tower-shape, sinuate elongate, smooth elongate, silica stoma, silica hair and hair tip, among which long-saddle phytolith is diagnostic for Bambusoideae.

选择我国常见的竹亚科19属64种进行系统的植硅体形态学研究，对竹亚科特有的长鞍型植硅体的长度、宽度、高度和硅质颗粒数目等参数进行了测量。

This paper studies a single phase voltage SPWM inverter based on repetitive control, whose key point is achieving a good sinusoidal output wave. Firstly, this paper detailed discusses the inverter system"s working characters and mathematic model. Then repetitive control technique and the choice of its parameters, the whole system"s stability, the strategy of closed-loop control are discussed. Finally

本文首先阐述了逆变系统的工作原理，对单相逆变电源的建模进行了详细讨论；然后论述了重复控制技术理论的原理，重复控制系统参数的选择、整个系统的稳定性、闭环反馈控制的策略；最后给出了基于MATLAB的仿真结果和基于单片机C8051作控制系统的实验结果，并对实验过程中存在的问题进行了详细的讨论。

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