Results 131 to 140 of about 45,761 (309)

Study of Urban Unmanned Aerial Vehicle Separation in Free Flight Based on Track Prediction

Applied Sciences
In recent years, the application prospect of urban logistics unmanned aerial vehicles has attracted extensive attention. The high-density operation of UAVs requires autonomous separation maintenance capability.
Jian Zhang, Zongxiao Li, Xinyue Luo, Yifei Zhao, Fei Lu   +4 more
doaj   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Unveiling spatial heterogeneity in urban underground space development patterns and mechanisms for differentiated planning: A points of interest‐based study of Shanghai

Deep Underground Science and Engineering, EarlyView.
This study investigated the spatial patterns and development mechanisms of urban underground space (UUS) in Shanghai using underground points of interest data. It revealed distinct development mechanisms between the main city and suburbs, highlighting the need for differentiated UUS planning and policies to optimize underground space resources ...
Chenxiao Ma, Fangle Peng, Yongkang Qiao, Yunhao Dong   +3 more
wiley   +1 more source

Air traffic management innovation: the risks of STASIS [PDF]

, 2007
Stasis is a word used by the ancient Greeks to mean many different things: civil war, arguments between factions, ‘a stoppage’. Today it generally means a cessation of progress or change.
Brooker, Peter
core  

Spatial–temporal dynamics of airside congestion: a macroscopic fundamental diagram perspective [PDF]

Airport airside congestion, driven by the growing imbalance between air traffic demand and constrained capacity, presents significant operational challenges that affect efficiency, safety, and environmental impact.
Thai, Van Phat, Hoo, Xuan Tao, Pham, Duc-Thinh, Alam, Sameer, Ali, Hasnain   +4 more
core   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

A dynamic debris hazard corridor for space and air traffic management [PDF]

The airspace is a national asset shared by a multitude of users, including aircraft, drones, and spacecraft. Regulating airspace usage among various stakeholders has traditionally been achieved by segregating different operations.
Schultz, Michael, Dhief, Imen, Wang, Zhengyi, Rabus, Tobias, Alam, Sameer, Zhou, Wei, Kaltenhäuser, Sven   +6 more
core  

Mamba-VNPS: A Visual Navigation and Positioning System with State-Selection Space

Drones
This study was designed to address the challenges of autonomous navigation facing UAVs in urban air mobility environments without GPS. Unlike traditional localization methods that rely heavily on GPS and pre-mapped routes, Mamba-VNPS leverages a self ...
Longyang Huang, Zhiyuan Wang, Qiankai Xiong, Ruokun Qu, Chenghao Yao, Chenglong Li   +5 more
doaj   +1 more source

Synergistic Catalysis for Closed‐Loop Alcohol Refining: Concurrent H2 Evolution and Selective Oxidation

EcoEnergy, EarlyView.
Photocatalytic, electrocatalytic, and photoelectrocatalytic systems exhibit a clear synergistic integration logic in closed‐loop alcohol refining—concurrently driving hydrogen evolution and selective alcohol oxidation to enable the directed conversion of alcohols into high‐value chemicals.
Wei Ren, Jinhe Li, Banghu Wei, Mohamed Hussein Abdurahman, Ahmad Zuhairi Abdullah, Xiaohui Yu, Weikang Wang, Qinqin Liu   +7 more
wiley   +1 more source

Topography constrains the climatic response of treeline migration in Taiwan's subalpine forests

Ecography, EarlyView.
Treelines are moving upslope, but the rates and drivers differ among different regions, globally. Many studies have examined the relationship between treeline movement and climate change, particularly rising temperature, while the role of topographical factors has received much less attention, despite the longstanding recognition of its importance.
Kuan‐Yu Chen, Jonathan Peereman, J. Aaron Hogan, Teng‐Chiu Lin   +3 more
wiley   +1 more source