Disentangling relations between dynamic urban structure and its efficiency in 287 cities across China
文献类型：期刊论文
| 作者 | Wang, Nan2,3; Du, Yunyan2,3; Liang, Fuyuan1; Yi, Jiawei2,3; Qian, Jiale2,3; Tu, Wenna2,3; Huang, Sheng2,3; Luo, Peixian2,3 |
| 刊名 | SUSTAINABLE CITIES AND SOCIETY
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 99页码:17 |
| ISSN号 | 2210-6707 |
| 关键词 | Dynamic urban structure Urban efficiency Urban scaling law Lorenz Curve Chinese cities |
| 通讯作者 | Du, Yunyan(duyy@lreis.ac.cn) |
| 英文摘要 | Conventionally urban structures are mainly inferred from the spatial arranges of related urban elements such as land use and population density. China's unprecedented urbanization process has significantly changed urban spatial structure and it is not clear how urban structure impacts the sustainability and livability of cities across a large geographic space. Furthermore, urban structure always shows dynamical variations during the day and over the night, which are a challenge to be captured by the conventional research methods and data. In this paper, we evaluated and compared the characteristics of the urban structure of the 287 cities in China by examining the dynamic changes of urban human activities distribution inferred from location requests collected by Tencent's platform. We developed two new indexes, the Dispersion Variation Index (DVI) and Spatial Dispersion Variation Index (SDVI), using the Lorenz curve, Gini coefficient, and adjusted Ripley's K function to describe the overall agglomeration intensity and the temporal variability of human activities. We also applied the urban scaling law to create two further indexes, the Scale-Adjusted Metropolitan Indicator DVI (SAMI_DVI) and the Scale-Adjusted Metropolitan Indicator SDVI (SAMI_SDVI), which enable us to evaluate the efficiency of urban structures. Our results show that the daily fluctuations of the urban structure are related to urban population, and also impacted by urban planning, topography, and other factors. The 1st-tier cities have the highest DVI (median: 0.020) and SDVI (0.052) values, which suggest the most volatile urban structure during the day. The 2nd-tier cities have the lowest urban structure efficiency, as suggested by higher SAMI_DVI (0.17) and SAMI_SDVI (0.28) values. Also, 69.2% and 76.9% of the 2nd-tier cities have DVI and SDVI values over the predicted values based on their population sizes. We also demonstrate that cities with high unstable structural characteristics tend to exhibit lower commuting efficiency and higher carbon emission intensity. Our framework outperforms previous metrics, is highly scalable, and can be implemented at little cost, allowing studies to be conducted even in small and medium-sized cities with little traditional data. |
| WOS关键词 | POPULATION-DENSITY ; SCALING LAWS ; PATTERNS ; SEOUL |
| 资助项目 | Innovation Project of State Key Laboratory of Resources and Environmental Information System[KPI002] ; Innovation Project of State Key Laboratory of Resources and Environmental Information System[YPI006] ; National Natural Science Foundation of China[41901395] |
| WOS研究方向 | Construction & Building Technology ; Science & Technology - Other Topics ; Energy & Fuels |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001069861400002 |
| 资助机构 | Innovation Project of State Key Laboratory of Resources and Environmental Information System ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/198056]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Du, Yunyan |
| 作者单位 | 1.Western Illinois Univ, Dept Earth Atmospher & Geog Informat Sci, Macomb, IL 61455 USA 2.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Nan,Du, Yunyan,Liang, Fuyuan,et al. Disentangling relations between dynamic urban structure and its efficiency in 287 cities across China[J]. SUSTAINABLE CITIES AND SOCIETY,2023,99:17. |
| APA | Wang, Nan.,Du, Yunyan.,Liang, Fuyuan.,Yi, Jiawei.,Qian, Jiale.,...&Luo, Peixian.(2023).Disentangling relations between dynamic urban structure and its efficiency in 287 cities across China.SUSTAINABLE CITIES AND SOCIETY,99,17. |
| MLA | Wang, Nan,et al."Disentangling relations between dynamic urban structure and its efficiency in 287 cities across China".SUSTAINABLE CITIES AND SOCIETY 99(2023):17. |
入库方式： OAI收割
来源：地理科学与资源研究所
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