Results 61 to 70 of about 693,378 (301)

ANALYSIS OF THE SPATIAL STRUCTURE OF URBAN ANTHROPOGENIC AREAS

Acta Scientiarum Polonorum. Formatio Circumiectus, 2019
Dynamiczny proces urbanizacji, zachodzący na skutek powszechnej antropogenizacji, wpływa na zmiany krajobrazu. Zmiany te, mierzone za pomocą różnorodnych współczynników i indeksów, są globalnym obiektem badań. Celem pracy była analiza struktury przestrzennej antropogenicznych elementów pokrycia terenu.
Katarzyna Cegielska, Piotr Piotrowski, Anita Kukulska, Marta Szylar   +3 more
openaire   +2 more sources

Spatially Selective Solvation Chemistry by Local Charge Enrichment for Stable Potassium‐Metal Anodes

Advanced Science, EarlyView.
A MoC/NC functional intermediate medium preferentially interacts with KFSI to reconstruct the interfacial solvation structure and form a KF‐rich inorganic SEI. The synergistic integration of the electronically insulating SEI and MoC/NC suppresses electron tunneling, enables fast and balanced K+/electron transport, and promotes uniform K deposition for ...
Lu‐Kang Zhao, Xi‐Ran Zhao, Zhimin Ding, Yu‐Hua Bian, Xuan‐Chen Wang, Dongdong Zhao, Yizhuo Zhao, Xuan‐Wen Gao, Zhaomeng Liu, Wen‐Bin Luo   +9 more
wiley   +1 more source

Hydrothermal Embedding of Pd Single Atoms Into SnO2 for Efficient CO Oxidation

Advanced Science, EarlyView.
By applying hydrothermal regulation to SnO2‐supported PdO, we achieve atomic dispersion of Pd into the SnO2 lattice, which activates the lattice oxygen neighboring Pd atoms to generate oxygen vacancies and facilitates subsequent O2 activation, thereby promoting CO oxidation to proceed via a low‐energy‐barrier MvK pathway while avoiding CO poisoning ...
Yingsheng An, Min Xiao, Mengyuan Zhang, Yao Lv, Yanwei Sun, Zhi Liu, Wenbo Pei, Hao Guo, Guangyan Xu, Yong Yan, Sheng Dai, Yunbo Yu, Hong He   +12 more
wiley   +1 more source

Flow space reveals the urban network structure and development mode of cities in Liaoning, China

Humanities & Social Sciences Communications, 2023
As an important supplement to “location space”, “flow space” has become an important trend in urban network research. At present, the theoretical basis and empirical research of urban network structure from the perspective of “flow space” are not ...
Shenzhen Tian, Jialin Jiang, Hang Li, Xueming Li, Jun Yang, Chuanglin Fang   +5 more
doaj   +1 more source

Hypercongestion, Autonomous Vehicles, and Urban Spatial Structure

Transportation Science
This paper examines the effects of hypercongestion mitigation by perimeter control and the introduction of autonomous vehicles on the spatial structures of cities. By incorporating a bathtub model, we develop a land use model where hypercongestion occurs in the downtown area and interacts with land use.
Takao Dantsuji, Yuki Takayama
openaire   +2 more sources

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Morphological transformation of the old city of Beijing after 1949 [PDF]

, 2004
The old city of Beijing has been recognized as the greatest masterpiece of urban planning and urban design. However, since 1949 it has experienced extensive and fast constructions and demolitions, a large number of papers argued that physical and ...
Yang, T.
core  

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Centrality Measures in Spatial Networks of Urban Streets

, 2005
We study centrality in urban street patterns of different world cities represented as networks in geographical space. The results indicate that a spatial analysis based on a set of four centrality indices allows an extended visualization and ...
A. Bavelas, A. Jacobs, B. Hillier, C. Dagum, D. B. West, G. A. Wilson, Paolo Crucitti, S. Wasserman, Sergio Porta, Vito Latora   +9 more
core   +2 more sources