Results 31 to 40 of about 147,710 (303)
A Stochastic Programming Approach on Aircraft Recovery Problem [PDF]
Mathematical Problems in Engineering, 2015 The unexpected aircraft failure is one of the main disruption factors that cause flight irregularity. The aircraft schedule recovery is a challenging problem in both industrial and academic fields, especially when aircraft restoration time is uncertain, which is often ignored in previous research.
Bo Zhu, Jin-fu Zhu, Qiang Gao
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Advanced Science, EarlyView.A high‐entropy oxide ceramic of (Gd1/2Lu1/2)2(Ti1/3Zr1/3Hf1/3)2O7 is prepared through a molecular synthesis route of pyrolytic solid‐solution reactions. The architectured nanofiber aerogel manifests unprecedented thermomechanical properties, including superelastic compressibility of 98% from −196 to 1500 °C, and thermal superinsulation capacity (24.14 ...
Xiaoke Jiang +9 more
wiley +1 more source
Zhongguo Jianchuan YanjiuObjectiveThe causal factors underlying anomalies during carrier-based aircraft launch and recovery are often rare and unpredictable. To address the hallucination issues commonly encountered by large language models (LLMs) when generating these anomaly ...
Zhengqing HU +7 more
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Aircraft Spin Recovery Technique Based on Deep Reinforcement Learning [PDF]
Hangkong bingqiThis paper builds an aircraft simulation environment, and establishes a test model of an automated spin recovery algorithm based on proximal policy optimization (PPO) algorithm.
Tan Jianmei, Wang Junqiu
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Helicopter recovery in an oil and gas industry: Model and solution approaches
EURO Journal on Transportation and Logistics, 2022 Although optimization techniques have been successfully applied for a number of airline operations, aircraft recovery remains a challenge for both practitioners and researchers due to its complexity and the usual need of a quick response in practical ...
Jonathan De La Vega +7 more
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Laboratory and on-site tests for rapid runway repair [PDF]
, 2017 The attention to rapid pavement repair has grown fast in recent decades: this topic is strategic for the airport management process for civil purposes and peacekeeping missions.
Cassata, Mauro +6 more
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Advanced Science, EarlyView.Electrospinning a composite of PVDF, HfO2, and nano‐Cu transforms the discrete precursors into a continuous nanofiber mesh, forming a multi‐interface heterostructure with embedded nanoparticles. The presence of HfO2 and nano‐Cu at the fiber interfaces induces a highly aligned β‐phase, which enhances piezoelectric crystallinity and improves the material'
Jiawei Gu +9 more
wiley +1 more source
Scoop attachment makes helicopter recoveries easier and safer [PDF]
, 1965 Helicopter with rigid boom and net attachment performs rescue or recovery operations easily and safely. The attachment in the front of the helicopter scoops objects from difficult and otherwise inaccessible areas and pivots to the side hatch of the ...
Koons, W. E.
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Advanced Science, EarlyView.A kind of new CNDs‐based materials with reversible mechano‐responsive phosphorescence emission through incorporating CNDs into the supramolecular rigid network is leveraged for aerospace applications, where the CND‐embedded film demonstrated memorable visualization of stress distribution in wings under sudden mechanical events (e.g., micro‐impacts ...
Yachuan Liang +7 more
wiley +1 more source
Overtaking collision avoidance for small autonomous uncrewed aircraft using geometric keep-out zones
Frontiers in Aerospace Engineering, 2023 Autonomous uncrewed aircraft will require collision avoidance systems (CASs) designed with autonomy in mind as they integrate into the increasingly crowded national airspace system.
Nathaniel C. Hawes, Jay P. Wilhelm
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