Article
Urban Studies
Jean-Marie Halleux, Mathieu Treffer, Hubert Maldague
Summary: The phenomenon of multipolarization in urban outskirts, driven by home-to-work commutes, is growing but has received little research attention. This challenges the traditional framework of urban geography based on intra- and inter-urban scales. Research in Belgium suggests that the concept of multipolarization is significant for urban and economic geographers.
Article
Multidisciplinary Sciences
Masanobu Kii, Tetsuya Tamaki, Tatsuya Suzuki, Atsuko Nonomura
Summary: In this study, a method for analyzing the functional spatial structure of cities based on satellite remote sensing data is proposed. Using the estimated trip attraction, a contour tree is created to identify the spatial extent and hierarchical structure of central functions. When applied to the Tokyo metropolitan area, the method reproduced a high percentage of urban and non-urban areas, extracted multiple urban centers, and aligned with the master plans for the metropolitan area.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Jing Tao, Ying Wang, Hashim Zameer
Summary: With rapid urbanization, the economic agglomeration within cities is associated with severe air pollution. Urban spatial structure adjustment has been recognized as an effective strategy for improving air quality. However, the research on how to mitigate air pollution originating from economic agglomeration through urban spatial structure adjustment is unclear.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Economics
Michiel van Meeteren
Summary: This paper analyzes the origin of the polycentric urban region (PUR), focusing on the Dutch Randstad. By examining the economic modernization of the 1950s and the preceding decades of crisis and war, the paper constructs a prehistory of the PUR through the biographical trajectories of Dutch geography and planning pioneers. It argues that planning the PUR should be seen as a gentle modernization strategy, leading to new interpretations of the contemporary utility of polycentricity.
Article
Urban Studies
Ben Derudder, Xingjian Liu, Mingshu Wang, Weiyang Zhang, Kang Wu, Freke Caset
Summary: In recent years, much research has been focused on developing appropriate analytical frameworks to capture polycentric urban development. A recent study provides a comprehensive review of the consistency of different analytical frameworks. Two key dimensions, the definition of centers and the balance between centers, are highlighted for future comparative analyses of PUD.
Article
Green & Sustainable Science & Technology
Will W. Qiang, Haowen Luo, Yuxuan Xiao, David W. H. Wong, Alex S. Shi, Ziwei Lin, Bo Huang, Harry F. Lee
Summary: This study uses population grid data from 2004 to 2018 to analyze the urban polycentricity in 284 Chinese prefecture-level cities. A new method is developed to measure urban polycentricity and its effects on air pollution are investigated. The findings suggest that the distance and size difference between urban centers can reduce air pollution within the city, but a strong clustering of urban centers with significant size disparity can shift pollution to other centers. This highlights the importance of considering the spatial inequality of air pollution in relation to polycentric urban structures.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Economics
Yuting Yang, Freke Caset, Ben Derudder
Summary: Research on the economic effects of urban polycentricity in Chinese urban regions is inconclusive. However, a longitudinal study reveals that the relationship between polycentricity and economic growth depends on population size and city interactions. Furthermore, the borrowing of size between cities in large urban regions contributes to regional economic growth. These findings offer insights for China's regional economic and urban development strategies.
Article
Computer Science, Theory & Methods
Rob Churchill, Lisa Singh
Summary: This study provides a comprehensive analysis of unsupervised topic models, including their origins, different types of models, and evaluation methods. It also summarizes the areas where topic models have been successful and identifies areas where further research is needed.
ACM COMPUTING SURVEYS
(2022)
Article
Environmental Sciences
Cheng Wang, Jingyuan Chen, Dan Li, Yunbin Zhang, Meng Zhu, Fang Rong, Zhiqiang Gan
Summary: This study examines the level of urban polycentricity in 41 cities in China's Yangtze River Delta region and investigates the driving factors behind its spatial differentiation. The results show that the distribution of hot and cold spots of the urban polycentricity index varies between different periods, and population size and topographic relief play key roles in driving urban polycentricity.
GEOCARTO INTERNATIONAL
(2023)
Article
Environmental Studies
Mingshu Wang
Summary: This paper empirically examines the relationship between polycentricity and the provision of urban amenities in 309 Chinese cities, finding that a higher degree of intra-urban polycentricity is associated with a larger number and greater diversity of urban amenities when controlling for other factors. The possible explanations of this relationship are provided from both the producer and consumer perspectives.
ENVIRONMENT AND PLANNING B-URBAN ANALYTICS AND CITY SCIENCE
(2021)
Article
Engineering, Civil
Haitao Ma, Xuanfang Xu
Summary: The study found that the morphological polycentricity of urban agglomerations is generally higher than the functional polycentricity, with no obvious correlation between the two. Most urban agglomerations are characterized by high morphological and low functional polycentricities, while those with both low morphological and functional polycentricities are rare.
JOURNAL OF URBAN PLANNING AND DEVELOPMENT
(2022)
Article
Development Studies
Wei Xiao, Wenhua Liu, Chunzhi Li
Summary: This study reveals that the monocentricity and compactness of a city have significant effects on urban employment growth, exhibiting a non-linear relationship and accelerating urbanization. Governments should pay attention to the impact of urban spatial structure on labor transfer when planning urban development.
Article
Environmental Studies
Liang Zhang, Linlin Zhang, Xue Liu
Summary: Although polycentrism is widely promoted as a solution for urban sprawl, there is a lack of empirical evidence to support this claim. Our study examines the performance of Hangzhou's polycentric spatial development and finds significant improvement, especially from 2010 to 2020. The development performance of different city centers varies, with Jiangnan city starting early, Xiasha city showing significant improvement, and Linping city being relatively weak. Socioeconomic factors and urban spatial organization play a crucial role in the temporal and spatial variability of Hangzhou's performance.
Article
Construction & Building Technology
Sheng Zheng, Yukuan Huang, Yuyuan Fu
Summary: Environmental pollution is a major concern in China due to rapid urbanization and expansion of urban areas. This study examines the impact of spatial structure on PM2.5 pollution by analyzing population centers in 369 Chinese cities from 2001 to 2018. The results show that the polycentric spatial structure significantly increases PM2.5 pollution, especially in the eastern region. However, there is a threshold effect, where the impact of polycentricity becomes weaker when the population exceeds 1.75 million. These findings provide valuable empirical analysis for urban planning to prevent and manage PM2.5 pollution.
SUSTAINABLE CITIES AND SOCIETY
(2023)
Article
Plant Sciences
Shuaishuai Han, Mei-Po Kwan, Changhong Miao, Bindong Sun
Summary: The process of urbanization has led to the loss of green spaces due to the agglomeration of population in cities and the conversion of rural landscapes. This study examines the effects of monocentric and polycentric urban spatial structures on the size and accessibility of green space in Chinese cities. The findings suggest that compact monocentric structures can improve the size of urban green space, while polycentric structures enhance its accessibility.
URBAN FORESTRY & URBAN GREENING
(2023)