Results 1 to 10 of about 26,499 (91)

Comparison of Actual Hybrid-Electric Flights with a Digital Twin in a Preliminary Aircraft Design Environment

Aerospace
To tackle climate change, aircraft designers envision new aircraft concepts which promise to reduce greenhouse gas emissions and enable greener flights. One option is hybrid-electric propulsion architectures.
Dominik Eisenhut, Andreas Bender, Niclas Grüning, Jonas Mangold, Andreas Strohmayer   +4 more
doaj   +1 more source

Evaluation of Aerodynamic and Sonic Boom Performance of Supersonic Transport Aircrafts with Multiple Wing Configurations

Aerospace
In this study, two-dimensional airfoil shapes obtained in aerodynamic optimizations are converted to three-dimensional wing models and then their aerodynamic and sonic boom performance are evaluated. The airfoil shapes analyzed are the diamond, Busemann,
Wataru Yamazaki, Shu Ishida
doaj   +1 more source

A Method for the Life Assessment of Aero-Engine Turbine Disks Based on a Time-Varying Load Spectrum

Aerospace
The load spectrum serves as the foundation for the life analysis of aero-engine turbine disks. To enhance the accuracy of life assessments for turbine disks, this study compiles a time-varying load spectrum for turbine disks.
Shunyu Yao, Xuming Niu, Zhigang Sun, Yingdong Song   +3 more
doaj   +1 more source

Relative Pose Estimation of an Uncooperative Target with Camera Marker Detection

Aerospace
Accurate and robust relative pose estimation is the first step in ensuring the success of an active debris removal mission. This paper introduces a novel method to detect structural markers on the European Space Agency’s Environmental Satellite (ENVISAT)
Batu Candan, Simone Servadio
doaj   +1 more source

Spectroscopic Quantification of Metallic Element Concentrations in Liquid-Propellant Rocket Exhaust Plumes

Aerospace
Accurate quantification of metallic contaminants in rocket exhaust plumes serves as a critical diagnostic indicator for engine wear monitoring. This paper develops a hybrid method combining atomic emission spectroscopy (AES) theory with a genetic ...
Siyang Tan, Song Yan, Xiang Li, Tong Su, Qingchun Lei, Wei Fan   +5 more
doaj   +1 more source

Pursuit-Interception Strategy in Differential Games Based on Q-Learning-Cover Algorithm

Aerospace
Due to the limited difference in maneuverability between the pursuer and the evader in three-dimensional space, it is difficult for a single pursuer to capture the evader. To address this, this paper proposes a strategy where three pursuers intercept one
Yu Bai, Di Zhou, Zhen He
doaj   +1 more source

DNA methylation in cord blood as mediator of the association between prenatal arsenic exposure and gestational age. [PDF]

Epigenetics, 2018
Bozack AK, Cardenas A, Quamruzzaman Q, Rahman M, Mostofa G, Christiani DC, Kile ML.   +6 more
europepmc   +1 more source

Dual method use among long-acting reversible contraceptive users. [PDF]

Eur J Contracept Reprod Health Care, 2018
Bernard C, Zhao Q, Peipert JF.
europepmc   +1 more source

Extending resuscitative endovascular balloon occlusion of the aorta: Endovascular variable aortic control in a lethal model of hemorrhagic shock. [PDF]

J Trauma Acute Care Surg, 2016
Williams TK, Neff LP, Johnson MA, Ferencz SA, Davidson AJ, Russo RM, Rasmussen TE.   +6 more
europepmc   +1 more source

Experimental Study on a Diesel Particulate Filter with Reciprocating Flow. [PDF]

ACS Omega, 2019
Deng Y, Wang X, Chen G, Wu H, Han Z, Li R.   +5 more
europepmc   +1 more source