Results 71 to 80 of about 264,581 (310)

Optimized power converters for electrically augmented on-orbit propulsion systems

, 2002
Advances in satellite thruster technology have produced the requirement for high power electrical supplies to operate electrically augmented on-orbit propulsion systems.
Olyniec, Lee Michael
core   +1 more source

3D‐Printed Sulfur‐Derived Polymers With Controlled Architectures for Lithium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
Rheology‐guided formulation design for direct ink writing enables the fabrication of 3D sulfur copolymer cathodes with controlled architectures for lithium‐sulfur batteries. The printed electrodes exhibit multiscale porosity and high sulfur utilization, delivering enhanced electrochemical performance compared to conventional cast electrodes.
Bin Ling, Haoran Wang, Pan Yang, Rishav Agrawal, Alex R. Neale, Laurence J. Hardwick, Tom Hasell, Esther García‐Tuñón   +7 more
wiley   +1 more source

Numeral simulation of solution mixing effect and product preparation effect in the process of preparing cerium oxide by microwave heating

Case Studies in Thermal Engineering
Microwave heating has the characteristics of simple control and high efficiency, in which electromagnetic force plays an important role. Using the UDF function and energy equation in FLUENT software, the electromagnetic force model in the tube is ...
Chao Lv, Yanlong Liu, Guannan Li, Tao Yang, Hongliang Zhao, Xuxin Chen   +5 more
doaj   +1 more source

A Surface‐engineered Microfluidic Device for Antibody‐Mediated Negative Selection of High‐Quality Sperm for Assisted Reproduction

Advanced Functional Materials, EarlyView.
This study reports a microfluidic device with a functionalized surface utilizing a polyoxazoline coating and covalently immobilized gold nanoparticles and anti‐phosphatidylserine antibody. The device efficiently eliminates pre‐apoptotic and apoptotic spermatozoa and yields sperm with substantially improved quality and low DNA damage, offering a simple ...
Soraya Rasi Ghaemi, David J. Sharkey, Nicole O. McPherson, Markos Negash Alemie, Krasimir Vasilev, Sarah A. Robertson   +5 more
wiley   +1 more source

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

Energies, 2019
Combined-cycle engine is a potential propulsion system for hypersonic aircraft. To ensure long-term, normal operation of combined-cycle engine under the harsh environment of high thermal load, it is of great significance to study the thermal protection ...
Yiwei Dong, Ertai Wang, Yancheng You, Chunping Yin, Zongpu Wu   +4 more
doaj   +1 more source

Designing Electric Propulsion Systems for UAVs [PDF]

, 2011
Due to the advantages of electric motors and electric batteries, the electric propulsion systems are widely used in UAVs [1,2]. The UAV's performance and endurance, the payload capacity and the flight time of the vehicle are affected highly by the structure and design of the electric propulsion system. In this paper, a new systematic design methodology
Mohamed Kara Mohamed, Sourav Patra, Alexander Lanzon   +2 more
openaire   +1 more source

Clustered engine study [PDF]

Several topics are presented in viewgraph form which together encompass the preliminary assessment of nuclear thermal rocket engine clustering. The study objectives, schedule, flow, and groundrules are covered.
Campion, AL, Glunt, George, Koontz, Rob, Kusunoki, Sid, Mouritzan, Gunnar, Porter, John, Sager, Paul, Shepard, Kyle, Vegter, George   +8 more
core   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

Propulsion Rig: A multirotor performance measurement test platform [PDF]

MATEC Web of Conferences
Off-the-shelf multirotor propulsion system components can produce uncertain static and dynamic performance. Commercially, solutions exist to characterise the inexact performance of the propulsion system, yet they are prohibitively expensive. To that end,
Hasewinkel Guy, Pretorius Arnold
doaj   +1 more source

A Nonlinear Propulsion System Simulation Technique for Piloted Simulators [PDF]

In the past, propulsion system simulations used in flight simulators have been extremely simple. This resulted in a loss of simulation realism since significant engine and aircraft interactions were neglected and important internal engine parameters were
Mihaloew, J. R.
core   +1 more source