社会趋势

With the development of society and demand of energy economy, it is the new direction and development trend that improving the focus and reducing optical losses of Fresnel lens.

随着社会的发展和节能经济的需求，提高菲涅尔透镜的聚焦性，降低透镜的光学损失成为了菲涅尔透镜研究的新动向和发展趋势。

A Style Description Framework Analysis of Gear Stick Based on GRA and ISM Grey Relation Analysis to locate the optimal solution for Gear sticks s design.

整合人性化生活产品和客制化需求用品的开发，并以消费者需求为导向，结合时代潮流、流行趋势、生活文化、设计美学及社会需求与风格为发展。

Based on analysis of the current development of sand and wind in Zhangjiakou and Chengde regions,the paper puts forward some sug- gestion in preventing sand in the work,according to the condition of nature,geography and society economy on different type areas in Hebei Prov- ince,such as the model of control sand.

在分析张家口、承德地区风沙形成原因及发展趋势的基础上，提出了河北省防沙治沙工作中存在的问题，根据河北省不同类型区的自然、地理及社会经济条件，提出了风沙治理模式和建议。

Globalisation is an inevitable trend which responds to the growth of productivity and advancement of science and technology.

全球化是社会生产力和科技发展的客观要求和必然趋势。

The development of new regionalism and globalism is the trend of contemporary economy, society and politics at present and in the future.

新区域主义以及全球主义的发展是当前和未来人类经济、社会、政治发展的主要趋势。

With the development of society and economy, the trend of globalization becomes indispensable to the world.

随着社会和经济的发展，全球化已经成为一个不可避免的趋势。

The first part is preface, on the basis of expounding the background, the purpose, the meaning and the thinking of the thesis study, briefly introduce the research achievements of domestic and international urban spatial structure; the second part is summary, expatiate on the connotation, component, research span and space type of urban spatial structure; The third part is theory foundation, mainly introduce the three classical models of city spatial structure in the west country (concentric circles mode, fan-shaped mode and multi-core mode) and the relative city development theories (growth pole theory, dot-axis theory, core-fringe theory, metropolis circle theory and city space evolution theory); The fourth part is general situations of study region; The fifth part is the analysis of Lanzhou city spatial structure evolution, along the historical venation Of city development, on the basis of analyzing industrial structure change, focus on and sumup the characteristics of spatial development and form, meanwhile, analyze factors which influences the spatial development; The sixth part is the analysis of Lanzhou city spatial development trend, put forward the development models of Lanzhou city spatial structure from three space aspects(the core city, the city, region) in the future, they are group gobbet structure, fingers structure, circle structure; The seventh part is to mainly put forward the development strategies for the different spatial structure models.

第一部分为前言，在阐明论文研究背景、目的及意义、思路的基础上，简要介绍了国内外城市空间结构相关研究成果；第二部分为概述，对城市空间结构的内涵、组成要素、研究尺度及其空间类型作以介绍；第三部分为理论基础，主要是对西方城市空间结构的3大经典模型(同心圆模式、扇形模式和多核心模式)以及与本研究相关的城市空间发展理论(增长极理论、点轴理论、核心——边缘理论、都市圈理论和城市空间演化理论)的介绍；第四部分为研究区概况，主要是对研究区域范围的界定及其社会经济发展概况介绍；第五部分是兰州城市空间结构演化分析，顺着兰州城市发展的历史脉络，在分析产业结构变动的基础上，着重对城市空间发展及其形态特征进行归纳总结，并分析了空间发展的主要影响因素；第六部分是兰州城市空间发展趋势分析，从中心城市、市域、区域3个空间层面上提出未来兰州城市空间结构的不同模式，即组团结构、指状结构、圈层结构；第七部分是城市空间发展策略，针对不同的城市空间发展模式提出一些对策建议。

The modernization city bring the problem of the environmental deterioration,here the deterioration is being build more and more buliding and the air being polluted by the unprimitive industry.People can't touch the ture nature,there more people choose to go into the groggery,ktv,and even some person consider gamble to the way of killing time.The trend of traffic accidents,family violence and many society's destabilizing factors will increasing instead of reducing pressure.

城市的现代化也带来了城市环境的"恶化"，这里的"恶化"指得是高楼地不断拔地而起，空气被工业的发展所污染，人们能接触到的真正的自然环境正日益在缩小它的范围，人们能选择的休闲方式也从大自然中走到了酒吧，KTV，甚至有的人以赌博作为自己的休闲方式，这些休闲方式往往会让交通事故，家庭暴力以及很多社会不安定因素成上升趋势，而并非能真正起到减少压力的效果。

Using the imbalance index of urbanization, taking 14 cities in Gansu Province as the basic unit, the differences between urbanization and social and economic indicators such as land area, population, cultivated land, grain yield, gross output of farming, gross output of industry and GDP and so on in 2004 were discussed. The trend of the imbalance index of urbanization responding to those indicators from 1995 to 2004 were analyzed.

本文利用城镇化不平衡指数，以甘肃省14个市州为基本单元，在时间断面上，探讨了2004年城镇化与土地面积、总人口、耕地面积、粮食产量、农业总产值、工业总产值和国内生产总值等社会经济指标之间的不平衡性；在时间序列上，分析了1995-2004年相对于这些指标的城镇化不平衡指数变动趋势。

Tall gyp business runs the social requirement of kind of professional, as a result of national economy fast with develop continuously and present a trend that expands increasingly.

高校工商管理类专业人才的社会需求，由于国民经济的快速与持续发展而呈现出日益扩大的趋势。

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。