情境感知视域下移动图书馆服务系统模型构建策略  

Spatio-temporal differentiation of Nanjing urban area based on long-termnighttime light data

作　　者：江立宇 习海旭 Tang Yun;Wang Yifeng;Gui Zhou(Geological Survey of Jiangsu Province,Nanjing 210018,China)

机构地区：[1]江苏理工学院图书馆,江苏常州213000 [2]江苏理工学院计算机工程学院,江苏常州213000

出　　处：《江苏科技信息》2023年第13期63-65,80,共4页Jiangsu Science and Technology Information

基　　金：国家社科基金2019年度项目;项目编号:19BTQ045。

摘　　要：移动图书馆服务系统设计中可借助情境因素提高感知能力,进而实现个性化、智慧化的服务功能,情境因素分为用户、社会、环境等多种类型。基于情境感知的服务系统模型由情境因素感知层、情境因素汇聚层、情境数据存储层以及情境应用服务层构成。系统设计的核心是情境感知推理和计算,这一功能依赖于算法程序。文章研究过程中结合书籍个性化推荐服务,介绍了情境感知与矩阵分解推荐算法的融合方式,取得了良好的推荐效果,说明情境感知能够有效提升系统的服务水平。With the continuous improvement of urbanization level,the evolution of urban spatio-temporal pattern has become an important research aspect of urban sustainable development,which can provide direct assistance for national spatial planning.Taking the three major urban areas of Nanjing(the main urban area,Gaochun district and Lishui district)as the research object,this paper extracts the urban area based on the long time sequence nighttime light images from 2000 to 2019,and studies the spatio-temporal evolution process of Nanjing urban area and the spatial difference of urban expansion by integrating the urban compactness,fractal dimension,barycenter coordinate transfer model and sector analysis.The results indicate that nighttime lighting can better represent the spatial evolution trend of urban areas;the main expansion direction of the main urban area is to the south,east by north,and north.Lishui district is to the north,north by east,and Gaochun district is to the east by north.

关 键 词：情境感知 移动图书馆 服务系统模型 构建策略 

分 类 号：G250.7[文化科学—图书馆学]