Results 11 to 20 of about 7,527 (250)

Solving Multiple Fleet Airline Disruption Problems Using a Distributed-Computation Approach to Integer Programming

open access: yesIEEE Access, 2017
The execution of the airline operation is often deviated from the original schedule due to some unexpected disruptions, such as aircraft breakdowns and severe weather conditions. In this situation, a recovery plan is needed to get the irregular operation
Zhengtian Wu, Benchi Li, Chuangyin Dang
doaj   +1 more source

Positioning and recovering of fixed-wing UAV using updating final-state control and adaptive nonstationary control

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2023
Descent deceleration using parachutes is widely used in the aerospace field for scenarios such as weather observation using the descent of high-altitude balloons (radiosondes), re-entry during space sample return, and emergency drone landings.
Susumu HARA, Mizuki HIRAI
doaj   +1 more source

Integrated aircraft and passenger recovery with cruise time controllability [PDF]

open access: yesAnnals of Operations Research, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ugur Arikan   +2 more
openaire   +3 more sources

Aircraft Upset Recovery Strategy and Pilot Assistance System Based on Reinforcement Learning

open access: yesAerospace
The upset state is an unexpected flight state, which is characterized by an unintentional deviation from normal operating parameters. It is difficult for the pilot to recover the aircraft from the upset state accurately and quickly.
Jin Wang   +5 more
doaj   +1 more source

Integrated airline recovery considering passengers’ decision-making under disruptions

open access: yesFrontiers in Future Transportation
This paper investigates the integrated airline recovery problem by incorporating passengers’ decision-making, with disrupted passengers categorized into three types: those experiencing delays, those opting for refunds, and those denied boarding due to ...
Shuai Wu   +4 more
doaj   +1 more source

Evaluation of the Thrust Recovery of an Aircraft Flapped Outflow Valve [PDF]

open access: yesJournal of Aircraft, 2010
This paper presents a detailed study of a flapped outflow valve. Well-known as part of the pressurization system of aircraft, this type of valve is also designed for thrust recovery even if the efficiency of the system has never been demonstrated. Aground experimental test rig is first designed to provide global and local measurements to be used as ...
Carbonneau, Xavier   +2 more
openaire   +3 more sources

Polyproline: A Synthetic Polypeptide With Unique Properties

open access: yesAngewandte Chemie, EarlyView.
Poly‐L‐proline is a unique polypeptide distinguished by its well‐defined secondary structures and unusual thermal behavior. This mini review highlights recent advances in the synthesis of poly‐L‐proline by N‐carboxyanhydride (NCA) polymerization, the formation of structurally defined architectures and nanostructures, and emerging strategies that ...
Rosanna Le Scouarnec   +3 more
wiley   +2 more sources

Study on Cushioning Simulation of Double Airbags for Aircraft Recovery

open access: yesNanjing Hangkong Hangtian Daxue Xuebao
Based on technical characteristics of current airbags for aircraft recovery, this paper studies the airbag cushion process by thermodynamic theory and the finite element method in order to satisfy the design of aircraft recovery.
SUN Yingchao   +5 more
doaj   +1 more source

Analysis of the influence of the scheme of flight of the stage with a reactive recovry system on the energy characteristics of a two-stage medium class launch vehicle

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016
The paper presents various schemes of flight of a separated part of the first stage, equipped with the reactive recovery system taking a two-stage oxygen-kerosene medium class launch vehicle assembled on the basis of the results of ballistic design and ...
U. L. Kuznetsov, D. S. Ukraintsev
doaj   +1 more source

A Vision-Based Method for Determining Aircraft State during Spin Recovery

open access: yesSensors, 2020
This article proposes a vision-based method of determining in which of the three states, defined in the spin recovery process, is an aircraft. The correct identification of this state is necessary to make the right decisions during the spin recovery ...
Tomasz Kapuscinski   +4 more
doaj   +1 more source

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