Results 31 to 40 of about 134,026 (130)

A fatigue crack initiation model incorporating discrete dislocation plasticity and surface roughness [PDF]

open access: yes, 2007
Although a thorough understanding of fatigue crack initiation is lacking, experiments have shown that the evolution of distinct dislocation distributions and surface roughness are key ingredients.
Brinckmann, Steffen   +1 more
core   +4 more sources

Faster identification of optimal contraction sequences for tensor networks [PDF]

open access: yes, 2014
The efficient evaluation of tensor expressions involving sums over multiple indices is of significant importance to many fields of research, including quantum many-body physics, loop quantum gravity, and quantum chemistry.
Haegeman, Jutho   +2 more
core   +3 more sources

A Method of Projecting of Electric Drive for the Traction Vehicle with wn Asynchronous Motor

open access: yesCommunications, 1999
This contribution describes a computing method of the continuous rating for the traction vehicle with induction traction motors. A method of specifying probable mechanical and electrical parameters and characteristics of the asynchronous motor as well as
Bernard Bednarik   +3 more
doaj   +1 more source

Combination system of slide variations of electric motors when using a probabilistic modelling approach of tractive effort distribution in multimotor drives of multidrive belt conveyors [PDF]

open access: yesНаучно-технический вестник Брянского государственного университета, 2019
The paper is aimed at specifying and summarizing system-wide and internal slide variations of electric motors in the structures of multimotor drives of multidrive belt conveyors.
Goncharov K.A.
doaj   +1 more source

Analysis of theoretical line loss in metro distribution network

open access: yesFrontiers in Smart Grids
IntroductionNovel cable traction power supply can eliminate phase splits and improve regenerative energy utilization in metro systems. However, the cable-based traction network has a relatively complex structure, making internal energy consumption and ...
Ying Zhao   +8 more
doaj   +1 more source

Comparison of Induction and PM Synchronous motor drives for EV application including design examples [PDF]

open access: yes, 2012
Three different motor drives for electric traction are compared, in terms of output power and efficiency at the same stack dimensions and inverter size. Induction motor (IM), surface-mounted permanent-magnet (PM) (SPM), and interior PM (IPM) synchronous ...
Boazzo, Barbara   +3 more
core   +1 more source

Fitler compensating installations in AC traction networks

open access: yesВестник Научно-исследовательского института железнодорожного транспорта, 2016
The article discusses the design solutions to filter compensating installations (FCI), used in traction AC networks. The authors presented summarized calculations for new FCI schemes for the AC traction power system, with determination of circuit ...
L. A. German   +2 more
doaj   +1 more source

Measuring cellular traction forces on non-planar substrates

open access: yes, 2016
Animal cells use traction forces to sense the mechanics and geometry of their environment. Measuring these traction forces requires a workflow combining cell experiments, image processing and force reconstruction based on elasticity theory.
Dreissen, Georg   +6 more
core   +1 more source

Carrying and tractive belts loading of a multi-drive conveyor in case of accidental sliding deviations of electric motor drives [PDF]

open access: yesНаучно-технический вестник Брянского государственного университета, 2020
The paper contains the results of theoretical studies of loading parameters of carrying and tractive belts of a multidrive belt conveyor in case of accidental sliding deviations of electric motor drives.
Goncharov K.A.
doaj   +1 more source

Sizing criterial for traction drives [PDF]

open access: yes, 1983
A simplified traction drive fatigue analysis which was derived from the Lundberg-Palmgren theory is measured and the effects of rotational speed, multiplicity of contacts, and variation in the available traction coefficient on traction drive system life,
Coy, J. J.   +2 more
core   +1 more source

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