نتایج جستجو برای: aircraft propeller
تعداد نتایج: 28733 فیلتر نتایج به سال:
The interaction between the slipstream of propellers and wing an aircraft with distributed electric propulsion (DEP) could benefit aerodynamics. A conceptual design optimization are carried out in order to increase range general aviation without affecting its takeoff landing velocity same fuselage condition. Propellers modelled using actuator disk (AD) theory, is vortex lattice method (VLM) obt...
High spin levels in 'Nb and 'Zr have been studied with the reactions Sr{GI,i, 3n) ~ Nb and 8 Sr(GLi, P2n) 'Zr by pulsed-beam-p, p-p, and p-W(&) measurements. Isomers were found which agree with theoretical predictions: a v =5.42 + 0.18-p, sec state at 2035 keV in Nb, l(g&g2) pqg2, $ ), and a v=6.15+0.50-psec state at (8188) keV in 'Zr, [(g9~2) &&d5y2, ~~+). The ~+9y2P, y2d&y2, + ) state in ~'Zr...
Hydrodynamic analysis of the marine propulsors with complex geometry such as podded drive systems, ducted propellers, and waterjet systems are more complicated than conventional propeller systems. This fact has caused the usage and development of numerical methods and techniques. The hybrid method to couple the Blade Element Momentum Theory (BEMT) with Reynolds-Averaged Navier Stokes method (RA...
BACKGROUND Henan Province has been in the malaria elimination stage, with all reports of the disease being imported since 2012 and over 90% coming from Africa. Surveillance and population studies are essential for the early detection and subsequent prevention of the spread of drug resistance. The K13-propeller gene was recently identified as a proposed molecular marker of artemisinin (ART) resi...
PURPOSE Hippocampal sclerosis (HS) is the most common cause of refractory temporal lobe epilepsy. Histopathologically, HS is characterized by neuron loss and gliosis. HS can be identified on MRI by signal increase on T(2)-weighted images and volume loss on T(1)-weighted volume images. The Periodically Rotated Overlapping Parallel Lines with Enhanced Reconstruction ("PROPELLER") sequence has exc...
Fixed-wing aircraft with vertical takeoff and landing capabilities need a lower speed higher lift during transition. To meet these needs, tandem-channel wing layout has been developed, including FLR (front than rear wing) configuration FUR upper configuration, which differ in height differences between the front wings. Numerical simulations have performed to investigate aerodynamic characterist...
Mutations in the Plasmodium falciparum K13-propeller domain have recently been shown to be important determinants of artemisinin resistance in Southeast Asia. This study investigated the prevalence of K13-propeller polymorphisms across sub-Saharan Africa. A total of 1212 P. falciparum samples collected from 12 countries were sequenced. None of the K13-propeller mutations previously reported in ...
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