Results 21 to 30 of about 166,033,218 (291)

Accelerated surgery versus standard care in hip fracture (HIP ATTACK): an international, randomised, controlled trial

, 2020
Observational studies have suggested that accelerated surgery is associated with improved outcomes in patients with a hip fracture.
(HIP ATTACK Investigators), Landoni G.
core   +1 more source

The research of attack angle measurment of projectile with CCD vertical target system [PDF]

, 2011
Based on the coordinate measurement principle of the CCD vertical target system, a new method is proposed to measure the attack angle of flying projectile.
Xu Wei, Wang M(王苗), Wang Miao, Miao, Wang, Wei, Xu   +4 more
core   +1 more source

The influence of aspect ratio and attack angle on the field structure and dynamic characteristics of the flow around an ellipsoid [PDF]

AIP Advances
The flow of an incompressible viscous fluid around an ellipsoid at a moderate Reynolds number (Re = 300) is numerically investigated, revealing a series of variation laws related to vortex shedding, flow separation, and the lift and drag coefficients as ...
Junwei Li, 李俊伟, Changyun Lu, 卢昌云, Pei Xu, 徐佩, Jie Wei, 韦杰, Mengran Yan, 闫梦冉, Valerii Kuznetsov   +10 more
doaj   +1 more source

Influence of attack angle on vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement

Advances in Mechanical Engineering, 2019
The vortex-induced vibration and energy harvesting of two cylinders in side-by-side arrangement with different attack angles are numerically investigated using two-dimensional unsteady Reynolds-Averaged Navier–Stokes simulations.
Li Zhang, Xinru Mao, Lin Ding
doaj   +1 more source

Robust Pitch Autopilot Design Based on Logarithmic Barrier Lyapunov Method [PDF]

Hangkong bingqi
When the phased array radar-guided missile intercepts a high speed target with large maneuvering, the aerodynamic parameters of the missile body vary dramatically and become nonlinear, which affects the response of the control system to the large angle ...
Wang Wei, Yang Jing, Lin Shiyao, Wang Hong, Wang Shaolong
doaj   +1 more source

Study on correction technology of aircraft angle-of-attack signal based on estimation of side-slip angle

Hangkong gongcheng jinzhan
The angle-of-attack signal is very important for modern fly-by-wire flight control system aircraft. The inconsistency of the local airflow on both sides of the nose will cause the difference of the angle-of-attack signal.The signal-monitoring voting ...
XUE Yuan, LIU Shimin, WEI Jianlong
doaj   +1 more source

Attack-like camera angle.

, 2023
One of the hallmarks of the collective movement of large schools of pelagic fish are waves of shimmering flashes that propagate across the school, usually following an attack by a predator.
Assaf Pertzelan (16632091), Gil Ariel (203708), Moshe Kiflawi (134237)   +2 more
core   +1 more source

Aerofoil behaviour at high angles of attack and at Reynolds numbers appropriate for small wind turbines [PDF]

, 2014
The aerodynamic characteristics of a NACA0018 aerofoil have been investigated experimentally for incidence angles ranging from 0° to 180° in closed-jet and open-jet wind tunnels with different blockage coefficients at Reynolds numbers from 60,000 to 140 ...
Dominy, Robert G, Du, Longhuan, Berson, Arganthaël, Dominy, Robert   +3 more
core   +1 more source

The influence of the angle of attack on passenger comfort

, 2021
The angle of attack (AOA) of an airplane changes the direction of the gravitational force on passengers and thereby might influence passengers’ flying experience. However, the contribution of the AOA regarding comfort/discomfort is not fully explored. In
Song, Y. (author), Li, Juntian (author), Vink, P. (author), Ping, Y. (author), Yao, X. (author), Xu, J. (author)   +5 more
core  

Micromechanics of high temperature hydrogen attack [PDF]

, 1999
Hydrogen attack is a material degradation process that occurs at elevated temperatures in hydrogen-rich environments, such as found in petrochemical installations.
Giessen, Erik van der,, Schlögl, Sabine M.,, Giessen, Erik van der; id_orcid, van der Giessen, E., van der Giessen, E.; id_orcid, Erik Van der Giessen, Schl”gl, S.M., Schlogl, SM, Schlögl, Sabine M., Giessen, Erik van der, Sabine M. Schlögl   +10 more
core   +3 more sources