Results 31 to 40 of about 17,921 (317)

Urban Agglomerations in European Infrastructure Networks [PDF]

Urban Studies, 1993
Infrastructure networks are often assumed to be important determinants of the economic potential of urban agglomerations. This paper addresses the position of 42 major European cities in three infrastructure networks: road, rail and air. A ranking of cities in terms of a gravity-based accesibility index is produced.
Bruinsma, F., Rietveld, P.
openaire   +3 more sources

Multi-dimensional Sources Apportionment of PM2.5 in Zhongyuan Urban Agglomeration Based on the CAMx Mode

Aerosol and Air Quality Research, 2022
Based on the comprehensive air quality model with extensions (CAMx), the quantitative simulation was conducted on the transport impact of PM2.5 between Zhongyuan Urban Agglomeration and surrounding cities in 2017, and the contribution of 5 major emission
Jinyu He, Wenbo Xue, Li Yan, Xurong Shi, Yanchao Wang, Yu Lei, Yixuan Zheng, Yu Zhang   +7 more
doaj   +1 more source

Spatio-temporal dynamic evolution characteristics and driving mechanism analysis of urban pseudo human settlements

Frontiers in Earth Science
Pseudo human settlements in the information age is an important part of human settlements geography, which has a comprehensive and profound impact on urban production, life and ecology in China and even the world, but the existing research on pseudo ...
Hang Li, Hang Li, Hang Li, Hang Li, Lin Lou, Lin Lou, Lin Lou, Yadan Wang, Yadan Wang, Yadan Wang, Shenzhen Tian, Shenzhen Tian, Shenzhen Tian, Shenzhen Tian, Jun Yang, Jun Yang, Jun Yang, Jun Yang, Xueping Cong   +18 more
doaj   +1 more source

Spatio-temporal difference analysis of land use efficiency in Lanxi Urban Agglomeration based on SBM-Undesirable model [PDF]

E3S Web of Conferences, 2020
Based on the connotation of green development, SBM-Undesirable model was used to measure the land use efficiency of Lanxi Urban Agglomeration in 2006, 2010, 2014 and 2018, and Theil Index and Spatial Autocorrelation Methods were used to reveal the ...
Fu Chunyu, Shi Peiji, Feng Tao, Zhang Weiping   +3 more
doaj   +1 more source

Projected hydroclimatic changes in Xinjiang under bias-corrected CMIP6 scenarios

Frontiers in Plant Science
Understanding future hydroclimatic variability in arid regions is essential for sustainable development and climate adaptation. This study uses bias-corrected CMIP6 daily climate projections, derived by applying the BCCAQ method to ERA5 reanalysis and ...
Yang Xu, Yang Xu, Yang Xu, Shenzhen Tian, Shenzhen Tian, Shenzhen Tian, Shenzhen Tian, Xueping Cong, Xueping Cong, Xueping Cong, Mengxin Bai, Juncheng Zhang   +11 more
doaj   +1 more source

基于压缩感知理论的远震P波数据重建研究

Dizhen xuebao
本文将基于压缩感知理论的地震观测数据重建方法用于天然远震事件的P波到时处理之中，基于曲波（curvelet）变换，建立基于L1范数的正则化反演模型，并采用迭代收缩阈值算法（ISTA）求解该模型。针对在内蒙古布设的流动地震台阵记录到的远震波形数据，对其进行稀疏采样，采用稀疏反演重建方法对欠采样数据进行重建，并拾取重建数据的P波到时，之后开展远震P波层析成像进行验证。研究结果表明，远震天然地震观测数据在曲波变换中表现出稀疏性，可利用压缩感知方法实现远震P波数据的完备化处理 ...
Qiyan Yang, Qingju Wu, Yajie Wei, Jingjie Cao, Zhicheng Cai, Zhiquan Yang, Yanrui Sheng   +6 more
doaj   +1 more source

Study on the Mechanism of Haze Pollution Affected by Urban Population Agglomeration

Atmosphere, 2022
Population agglomeration and haze pollution are two major problems that urban development will inevitably face in the future. Population agglomeration has a spatial impact on smog pollution through scale and intensive effects.
Xuesong Li, Min Zhou, Wenyu Zhang, Kewei Yu, Xin Meng   +4 more
doaj   +1 more source

The Impact of Spatial Structure on Economic Efficiency of Beijing-Tianjin-Hebei Megalopolis in China

Complexity, 2020
This study constructs a theoretical model and empirical framework concerning how spatial structure affects economic efficiency using data on the Beijing-Tianjin-Hebei (BTH) megaregion between 2008 and 2017.
Xingling Huang, Guoping Li, Jianguo Liu
doaj   +1 more source

The coupling coordination degree between urbanization and air environment in the Beijing(Jing)-Tianjin(Jin)-Hebei(Ji) urban agglomeration

Ecological Indicators, 2022
Urban agglomeration is an important geospatial unit for achieving SDGs. At the same time, air environment is the key to ensure the healthy life and safe production of mankind.
Xiaoyang Li, Zhaohua Lu, Yingdong Hou, Guoying Zhao, Lin Zhang   +4 more
doaj   +1 more source

Non‐Equilibrium Synthesis Methods to Create Metastable and High‐Entropy Nanomaterials

Advanced Science, EarlyView.
ABSTRACT Stabilizing multiple elements within a single phase enables the creation of advanced materials with exceptional properties arising from their complex composition. However, under equilibrium conditions, the Hume–Rothery rules impose strict limitations on solid‐state miscibility, restricting combinations of elements with mismatched crystal ...
Shuo Liu, Chaochao Dun, Jeffrey J. Urban, Mark T. Swihart   +3 more
wiley   +1 more source