Results 21 to 30 of about 32,976 (190)
Numerical Study on Parameters of the Airborne VLF Antenna by Quasi-Stationary Model
When a Very-Low-Frequency (VLF) antenna is towed in a circular flightpath at a constant altitude, the spatial configuration of the antenna can become relatively stationary with the orbiting aircraft.
Jiangfeng Cheng, Xueqiang Liu, Feng Deng
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Compression and energy absorption properties of Al foam-filled tube composite structure
The open-cell Al foam was fabricated by space-holder method and Al foam-filled tube was obtained by filling Al foam into Al alloy tube. The influences of wall thickness, bonding method and filling margin on the mechanical and energy absorbing properties ...
LI Sichao +3 more
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The correct installation of antenna-feeder devices on board a small spacecraft and the choice of their parameters make it possible to ensure the solution of target problems with high quality.
V. V. Eremina +4 more
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Research Progress on Measurement Methods and Influence Factors of Thin-film Stress
With the size of thin-film electronic devices decreasing, the film stress became an important reason for the failure of thin film devices. Film stress not only affected the membrane structure, but also associated with film optics, electricity, mechanics ...
MA Yibo +6 more
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The main aspects of the deployment of multi-module orbital manned stations are considered. The methodology for planning the delivery of spare parts, tools and accessories used in planning of transport operations to the International Space Station, is ...
I. V. Zheleznov +2 more
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Theoretical aspects of designing the components of an aircraft onboard cable network
The article presents theoretical foundations of designing the components of an aircraft onboard cable network, proposed as a methodology for solving the problems of designing onboard equipment.
A. Yu. Myasnikov
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Feasibility Study of Short Takeoff and Landing Urban Air Mobility Vehicles Using Geometric Programming [PDF]
Electric Short Takeoff and Landing (eSTOL) vehicles are proposed as a path towards implementing an Urban Air Mobility (UAM) network that reduces critical vehicle certification risks and offers advantages in vehicle performance compared to the widely ...
Antcliff K. R. +28 more
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Method of scanning thin surfaces in repairing gas turbine blades
Improving the efficiency of weld overlay repair of gas turbine blades by developing and implementing a method of scanning complex curved surfaces of gas turbine blades directly on the machine is the aim of this work.
D. I. Kotlyar, A. N. Lomanov
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Feasibility of Penetrant Testing on Surface Axial-Radial Cracks of GH4169 Super Alloy Turbine Disk
The post emulsifiable and water-washable fluorescent penetrant testing were carried out with ZL-27A and ZL67 respectively. Ultrasonic cleaning by detergent were used for 30 minutes before penetrant. The parts were immersed and drained for 60 minutes. The
QIAO Haiyan +3 more
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Model of the turboprop engine reduction gear tooth harmonic spectral component
The width of spectral components in rotary machines is determined by the frequency modulation of the carrier from the rotor speed deviation in the stationary operation mode.
A. E. Sundukov, E. V. Shakhmatov
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