Remotely sensed images and historical aerial photographs at seven different periods are used to study urban expansion in yixing city , in the taihu lake region , east china in the last 50 years 摘要长期以来，由于历史数据的缺乏，很难获得解放后我国城市扩展的完整过程。
With the development of economy , the city expands , the number of part - time peasants increases , and the pressure of person to farmland slowing down , that has promoted the circulating of farmland 随着经济的发展，城市扩展，兼业农户增加，减缓了农地的人地压力，促进了农地的流转。
Therefore , in the city expansion process , to maintain the region scenery pattern , and the continuity with integrity of earth organism , is a big key to maintain the city ecology security 因此,城市扩展过程中,维护区域山水格局和大地机体的连续性和完整性,是维护城市生态安全的一大关键。
According as the urban land use maps in different period and airscape in 1996 and 1999 of jinan , its spatial and temporal process of urban spread was analyzed through growth vector 本文在全面分析济南市自然条件的基础上，通过扩展向量、扩展速率和不对称系数三个变量，分析济南市城市扩展的演变过程。
The villages have survived thanks to the haphazard expansion of chinese cities , driven more by the whims of developers and local governments than by grand municipal plans 由于中国城市无计划的扩展，这些村庄得以幸存，而城市扩展的推动力在多数情况下是开发商和当地政府的心血来潮，而不是宏伟的市政计划。
We are one of the largest media operators of outdoor advertising in the pan - china region , and stand to profit from this growth as we expand our exclusive advertising network in china s major urban centers . 媒体世纪经营全国其中一个最大的户外广告媒体网络，将逐步在国内主要商业城市扩展其广告业务，与中国广告业共同成长。
Prove synthetically that the city expands lead the interaction between people and environmental enlargement and promotion . then put forward the ecology lead targets of " human living impact on ecological reduce to smallest extent " 综合说明城市扩展是人与环境相互作用的扩大和深化，从而提出“人居对生态问题的影响降低到最小的程度”的生态导向目标。
To break down the excessive uniformity and claustrophobia of the proposed design that asks for closed blocks of six storey buildings ; this apartment volume was developed as a reference point for the city extension and region at large 为了打破原先设想的“以六层建筑形成封闭街区”的过分的统一性和闭塞感，公寓的体量被当作城市扩展以及整个区域的标志点。
However , a city is always allocated in some special natural environment , and the relation among natural environment , city planning and urban construction is very closely , and the development of a city always embodies natural conditions everywhere 城市社会经济发展水平是城市扩展的直接动力；但是，城市发展离不开其形成与发展所依赖的自然环境，自然环境条件与城市规划和城市建设的关系非常密切，城市的发展处处体现自然条件的烙印。
In the case of the city of shijiazhuang , using certain mathematics formulas and considering the spreading tendency and specific situation , it divided the idiographic scope and discussed the main features . such as , loose areas , varieties , too much traffic entrance , lower land price and automatic transition and so on . it is the base of farm production , avocation , and storage 本文以石家庄市为例，运用一定的数学公式，结合城市扩展趋势和具体情况，划分出城乡结合部的具体范围，阐述了其主要特征：具有用地松散、类型多样、过境交通量大、土地价格低和动态的过渡性等基本特征；作为城市的农副产品基地，仓储转运基地，城市职能的疏散地和藩篱的功能特征；具有内、中、外三个圈层带和土地用途变更迅速、土地价格攀升明显的土地利用特征。
