Results 101 to 110 of about 558,955 (240)
AerospaceDistributed propulsion systems are strategically placed along the aircraft wingspan to ingest the fuselage boundary layer, thereby enhancing propulsion efficiency.
Wei Jia +4 more
doaj +1 more source
Zebrafish ventral gastrula fate map reveals neural crest progenitor domain
Developmental Dynamics, EarlyView.Abstract Background Fate maps relate progenitor cell positions to later fates and locations of their progeny, revealing early embryonic organization. Previous zebrafish fate maps identified the origin of germ layers and derivative cell fates, but ventral gastrula progenitor domains were not fully resolved. In particular, the neural crest, a multipotent
Elaine E. Kushkowski, Victoria E. Prince
wiley +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work systematically reviews the key factors influencing the performance of low‐temperature NH3‐SCR. The mechanism and challenges of defect engineering strategies, such as oxygen vacancies, heteroatom doping, crystal facet exposure, and surface reconstruction, in controlling both activity and selectivity were analyzed.
Rongrong Kan +3 more
wiley +1 more source
Energy Science &Engineering, EarlyView.Due to the depletion of fossil fuels, enhancing wind turbine efficiency is crucial. Utilizing airfoils with high lift‐to‐drag ratios significantly improves power generation by optimizing aerodynamic parameters. Furthermore, entropy generation analysis serves as an effective method for design optimization by minimizing energy losses and exergy ...
Mitra Yadegari
wiley +1 more source
Thrust Characteristics of a Ducted Fan of a Quadcopter in Various Flight Modes
FluidsDucted fans are widely used in vehicles with a high engine power per unit swept area, including hovercraft propulsors and vertical take-off aircraft. Computational fluid dynamics (CFD) is a powerful tool for selecting the aerodynamic configuration of new
Pavel Bulat, Pavel Chernyshov
doaj +1 more source
VehiclesSmall unmanned aerial vehicles (UAVs) are widely used in civil and military fields, and their noise problem has always been the industry’s focus.
Xulin Wang, Jianwei Ma
doaj +1 more source
Static Aero-Propulsion Experiment of an Electric Ducted Fan
AerospaceElectric ducted fans are gaining prominence in aviation due to their compact size, low noise, and zero emissions compared to conventional gas turbines. This study presents an experimental test system for a 390 mm electric Ducted Propulsion Fan developed ...
Hoang-Quan Chu +9 more
doaj +1 more source
International Journal of Cancer, EarlyView.ABSTRACT Spot‐based spatial transcriptomics (ST) allows for unbiased gene expression analysis within tissue architecture, overcoming the limitations of single‐cell RNA sequencing (scRNA‐seq) by preserving spatial context. However, the high spatial resolution in ST leads to cellular heterogeneity within spots, requiring computational deconvolution to ...
Stefan Altendorfer +2 more
wiley +1 more source
Time Optimal Altitude-Hold Flight Mode Transition Strategy for a Class of Ducted Fan Tail Sitter UAV
AerospaceFor special tail sitter configurations such as the ducted fan tail sitter unmanned aerial vehicle (UAV), the widely used trajectory planning methodology based on differential flatness might not be applicable due to complex aerodynamic coupling effects ...
Zihuan Cheng, Hailong Pei
doaj +1 more source
Synthesis of an Aircraft Featuring a Ducted-Fan Propulsive Empennage
, 2017 A study is done to investigate the feasibility of the conceptual design of the Delft University Unconventional Configuration (DUUC), an aircraft featuring a ducted-fan propulsive empennage.
Van den Dungen, N.H.M. (author)
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