Dividing the application into tiers (or layers) is an essential technique for separating concerns within the architecture.
将应用程序划分为层，这是一种在体系结构中关注点分离的基本技术。
Provide the vectograph of dividing layers , the realization course of the attribute data on the basis of west institute's planning drawing.
在规划图的基础上给出了分层的矢量图和属性数据的实现过程。
This paper brings forward the method of dividing a city into different circle layers, make certain the property of each layer, to make sure the urban population and urbanization level.
但由于城市行政界限的频繁变动和一些城市无限制地扩大市区行政面积 ，使城市人口和城市化水平的统计数字失真。
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