Results 51 to 60 of about 256,906 (176)

Investigation of aerodynamics and longitudinal stability of unmanned aerial vehicle with elevator deflection

open access: yesVietnam Journal of Mechanics, 2019
The elevator is usually hinged to the horizontal tail, which acts as a balance and controls the altitude, establishes a steady motion for the aircraft at all lift coefficients. During elevator rotating, the aircraft needs to be stable to establish a new
Hoang Thi Bich Ngoc, Bui Vinh Binh
doaj   +1 more source

Are tornado-like magnetic structures able to support solar prominence plasma? [PDF]

open access: yes, 2015
Recent high-resolution and high-cadence observations have surprisingly suggested that prominence barbs exhibit apparent rotating motions suggestive of a tornado-like structure. Additional evidence has been provided by Doppler measurements.
Luna, Manuel   +2 more
core   +2 more sources

Seismic Response of Tunnel Lining for Shallow-Bias Tunnel with a Small Clear Distance under Wenchuan Earthquake

open access: yesAdvances in Civil Engineering, 2018
In order to study the internal force characteristics of shallow-bias tunnel with a small clear distance in earthquake, a large-scale shaking table slope model test was designed, and the geometric scale was 1 : 10.
Yang Hui, Jiang Xueliang, Lian Pengyuan
doaj   +1 more source

Aerodynamic performance of control surfaces on Mars airplane balloon experiment two

open access: yesJournal of Fluid Science and Technology, 2019
We redesigned the Mars Airplane Balloon Experiment Two (MABE-2) based on MABE-1 to improve the vehicle’s stability and controllability. Following the redesign, the MABE-2 vehicle had a larger horizontal tail volume than that of MABE-1 for improved ...
Masahiro KANAZAKI   +4 more
doaj   +1 more source

Space craft soft landing system Patent [PDF]

open access: yes, 1965
Spacecraft shock absorbing system for soft ...
Eddins, T. O.
core   +1 more source

A macro-element based practical model for seismic analysis of steel-concrete composite high-rise buildings [PDF]

open access: yes, 2013
This is the post-print version of the final paper published in Engineering Structures. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting,
Bao   +22 more
core   +1 more source

Hydrothermal, mechanical responses and cryostructure of soft clay under horizontal freezing

open access: yesYantu gongcheng xuebao
Using the self-developed one-dimensional visual horizontal freezing device, one-way horizontal freezing tests are conducted on soft clay under various temperature gradients.
ZHANG Hu 1, 2, HU Jintao 1, ZHENG Bo 3, YANG Suiqiao 1, DONG Yuxuan 1, LU Ming 1, LIANG Yu 1, XING Lijun
doaj   +1 more source

Aerodynamic characteristics of an NASA supercritical-wing research airplane model with and without fuselage area-rule additions at Mach 0.25 to 1.00 [PDF]

open access: yes
Transonic pressure tunnel tests at Mach numbers from 0.25 to 1.00 were performed to determine the effects of area-rule additions to the sides of the fuselage on the aerodynamic characteristics of a 0.087 scale model of an NASA supercritical-wing research
Bartlett, D. W., Harris, C. D.
core   +1 more source

Study on Cumulative Damage Law of Stainless Steel-Reinforced Concrete Columns under Step Impact Loading

open access: yesAdvances in Materials Science and Engineering, 2019
In this study, an ultrahigh drop hammer impact test system was adopted for multiple horizontal impact tests on stainless steel-reinforced concrete columns and ordinary-reinforced concrete columns with the same longitudinal reinforcement diameter.
Bo Wu, Shixiang Xu, Guoxue Zhang
doaj   +1 more source

Can a charged ring levitate a neutral, polarizable object? Can Earnshaw's Theorem be extended to such objects? [PDF]

open access: yes, 2007
Stable electrostatic levitation and trapping of a neutral, polarizable object by a charged ring is shown to be theoretically impossible. Earnshaw's Theorem precludes the existence of such a stable, neutral particle trap.Comment: 11 pages, 1 ...
A. Ashkin   +9 more
core   +2 more sources

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