Results 21 to 30 of about 17,125 (245)

STUDY OF IMPORTANT VARIABLES OF AERODYNAMICS FOR SUBSONIC AIRCRAFT USING ADVANCED AIRCRAFT ANALYSIS SOFTWARE

Journal of Engineering, 2010
This study presents the important variables of aerodynamics of subsonic aircraft using AAA software, moreover to comprehensive preview of some imperical and mathematical equations where needs in this analysis process. Cruise mission chose for this study
Asaad T. Al-Omran, Sattar J. Habeeb, Israa Yheaa Daood   +2 more
doaj   +1 more source

Experimental Investigation of Two Switching States of an Active Foil Bearing during Start-Up

Machines, 2022
The next few years will be marked by major changes in the mobility sector in order to come closer to CO2 neutrality. Especially in the commercial vehicle sector, fuel cells can make an important contribution.
Hannes Schmiedeke, Jan-Hinrich Sick, Michael Sinapius   +2 more
doaj   +1 more source

Research on Transition Corridor of Ducted Vertical Take-off and Landing Fixed-wing UAV

Hangkong gongcheng jinzhan, 2022
The accurate description of the transition corridor is important for vertical take-off and landing(VTOL)fixed-wing unmanned aerial vehicle(UAV)flight. In order to study the transitional flight process of VTOL fixedwing UAV,a transition corridor model of ...
WANG Chunyang, ZHOU Zhou
doaj   +1 more source

Research on Design Method of Short Take-off Performance of Tilt-rotor Aircraft during Preliminary Design Stage

Hangkong gongcheng jinzhan, 2018
Tilt-rotor aircraft has both vertical take-off and high-speed cruise capability, and has been widely applied in many fields. It is of great significance to study the take-off performance design of the tilt-rotor aircraft in the short take-off mode.
Qi Wantao
doaj   +1 more source

Demonstration of Vertical GaN Schottky Barrier Diode With Robust Electrothermal Ruggedness and Fast Switching Capability by Eutectic Bonding and Laser Lift-Off Techniques

IEEE Journal of the Electron Devices Society, 2022
In this letter, we have successfully transferred the 4-inch crack-free GaN films from sapphire substrate to conductive silicon wafer by employing eutectic bonding and laser lift-off (LLO) techniques.
Qi Wei, Feng Zhou, Weizong Xu, Fangfang Ren, Dong Zhou, Dunjun Chen, Rong Zhang, Youdou Zheng, Hai Lu   +8 more
doaj   +1 more source

The Research of 30 mm Detecting Distance of Testing Device for Wire Rope Based on Open Magnetizer

Applied Sciences, 2022
Wire rope will have defects such as local faults (LF) and loss of metal area (LMA) during the long-term using process. The nondestructive testing method of magnetic flux leakage (MFL) has been widely used in wire rope defect detection.
Mengqi Liu, Chi Zhang, Xiaoyuan Jiang, Yanhua Sun, Xiaotian Jiang, Ran Li, Lingsong He   +6 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Investigating the Impact of Flow Control Devices on the Low-Speed Performance of a Blended-Wing-Body UAV

Engineering Proceedings
This study investigates the effect of active and passive flow control devices on the aerodynamic behavior and stability of a Blended-Wing-Body (BWB) Unmanned Air Vehicle (UAV), emphasizing the low-speed segments of a typical flight.
Spyridon Antoniou, Konstantinos Antoniou, Pericles Panagiotou, Kyros Yakinthos   +3 more
doaj   +1 more source

Research on Distributed Jet Blowing Wing Based on the Principle of Fan-Wing Vortex-Induced Lift and Thrust

International Journal of Aerospace Engineering, 2019
Based on the numerical calculation and analysis of the principle of the lift and thrust of the Fan-wing. A new scheme for the wing of Fan-wing aircraft-distributed jet blowing wing was presented.
Du Siliang, Zhao Qijun, Wang Bo
doaj   +1 more source

Acute Neurological Events in Children With Hemoglobin SC Disease: A Multicenter Retrospective Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Neurological manifestations in children with hemoglobin SC (HbSC) disease remain insufficiently characterized, particularly regarding acute events. The aim of this study was to describe the spectrum and frequency of acute neurological events in a multicenter cohort of children with HbSC disease.
Célia Paulmin, Bérengère Koehl, Audrey Maudoux, Hanine Mansour, Marie‐Hélène Odievre, Nathalie Garrec, Emilie Georget, Cécile Arnaud, Slimane Allali, Lydia Doumdo, Marie Belloy, Corinne Guitton   +11 more
wiley   +1 more source