Results 81 to 90 of about 299,357 (239)
Factors influencing aircraft ground handling performance [PDF]
Problems associated with aircraft ground handling operations on wet runways are discussed and major factors which influence tire/runway braking and cornering traction capability are identified including runway characteristics, tire hydroplaning, brake ...
Yager, T. J.
core +1 more source
Wear rates in urban rail systems [PDF]
, 2017 A significant part of maintenance costs in urban rail systems (metro, tram, light rapid transit/light metro) is due to wheel-rail wear. Wear rates - measured for example as depth of wear per kilometre run (rolling stock) or per train passage (rails ...
Licciardello, R. +3 more
core +1 more source
A Soft Microrobot for Single‐Cell Transport, Spheroid Assembly, and Dual‐Mode Drug Screening
Advanced Materials, EarlyView.A soft, untethered hydrogel microrobot enables precise single‐cell delivery, self‐assembly into 3D spheroids, and real‐time thermal actuation. Driven by light‐induced convection and embedded with gold nanorods and temperature sensors, the microrobot guides cells, modulates local microenvironments, and supports drug testing.
Philipp Harder +3 more
wiley +1 more source
Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
wiley +1 more source
Моделирование устройств системы управления асинхронным тяговым электроприводом дизель-поезда [PDF]
, 2012 Разработана математическая модель системы управления тяговым асинхронным электроприводом дизель-поезда, которая позволяет исследовать работу дизель-поезда в различных режимах, оценивать эффективность предлагаемых регуляторов и осуществлять поиск их ...
Носков, Валентин Иванович
core
On the convergence of stresses in fretting fatigue [PDF]
, 2016 Fretting is a phenomenon that occurs at the contacts of surfaces that are subjected to oscillatory relative movement of small amplitudes. Depending on service conditions, fretting may significantly reduce the service life of a component due to fretting ...
Abdel Wahab, Magd +6 more
core +2 more sources
Advancements in TLP Bonding for Power Electronics Die‐Attach Applications
Advanced Materials Technologies, EarlyView.Transient Liquid Phase (TLP) bonding is gaining traction as a lead‐free die‐attach technology in power electronics packaging. This review examines the state of TLP bonding, its key elements, reliability aspects, and practical limitations. This review also highlights emerging trends, such as nanostructured interfaces, that may improve scalability of TLP
Fatin Battal +4 more
wiley +1 more source
Research on Key Technologies of Traction System Based on Power Electronic Transformer
Kongzhi Yu Xinxi Jishu, 2017 This paper proposed a main circuit structure of a new traction drive system based on power electronic transformer (PET). Compared with traditional traction drive system, the new transmission system has lighter weight and smaller size , has more flexible ...
SONG Pinggang, GE Wang, ZHU Weichang
doaj
Universal characteristics of magnetic losses in electric traction machines
Science and Transport Progress, 2013 The analysis of dependence of the magnetic losses in hauling electric motors on the frequency of armature remagnetization is presented. A universal characteristics of the magnetic losses reduced to the frequency of remagnetization of 50 Hertz is offered.
openaire +2 more sources
NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
core +1 more source