Results 61 to 70 of about 8,569,882 (345)

An Adipokinetic Hormone Acts as a Volume Regulator in the Intertidal Gastropod Mollusk, Aplysia californica

open access: yesFrontiers in Endocrinology, 2018
Adipokinetic hormone (AKH) is a multifunctional neuropeptide in the gonadotropin-releasing hormone superfamily. In insects, AKH acts to mobilize energy stores during times of high energetic demand, but has been shown to have other effects.
Anthony W. Martillotti, Pei-San Tsai
doaj   +1 more source

Introduzione. Donatori, istituzioni e comunità

open access: yes, 2021
Il saggio esamina criticamente il tema oggetto del volume collettaneo: i benefattori, le motivazioni e le strategie del dare fra Medioevo e prima Età contemporanea.
Edward, Loss, Mauro, Carboni
core   +1 more source

Analysis of AC winding loss of permanent magnet synchronous traction motor with high power

open access: yes机车电传动, 2022
In a multiple-pole and high-power PMSTM with high fundamental frequency, the harmonic frequency of the internal magnetic field increases accordingly. The harmonic magnetic field will induce eddy current in the winding, resulting in high-frequency eddy ...
LI Xiangcheng   +3 more
doaj  

The influence of frequency of AC component on space charge behaviours in polyethylene under combined AC and DC electric fields [PDF]

open access: yes, 2014
Combined ac and dc voltages may occur in high voltage power transmission system, which bring challenges to the dielectric materials. Generally speaking, space charge is well recognised under high voltage dc conditions but has received little attention ...
C. Zhou   +3 more
core   +2 more sources

Evaluation Method and Influence Law of UV-Cured Polyurethane on the Self-Healing Performance of Asphalt and Asphalt Mixtures

open access: yesBuildings, 2023
To explore the effect of UV-curable polyurethane (UV-PU) on the self-healing performance (SHP) of asphalt and asphalt mixtures, this article conducted research in this area of the evaluation method and influenced the law.
Huaizhang Sun   +9 more
doaj   +1 more source

The shielding effect of HTS power cable based on E-J power law [PDF]

open access: yes, 2004
A method for analysing the current distribution in high-T/sub c/ superconducting (HTS) power cable is examined by the aid of the novel use of anisotropic conductivity and 3-D finite element method considering E-J power law characteristic.
Torii, Shinji   +6 more
core   +1 more source

Effect of the magnetic material on AC losses in HTS conductors in AC magnetic field carrying AC transport current

open access: yesAIP Advances, 2015
This paper presents an investigation on the AC losses in several typical superconducting composite conductors using the H-formulation model. A single superconducting strip with ferromagnetic substrate or cores and a stack of coated conductors with ...
Xing-Xing Wan   +3 more
doaj   +1 more source

Role of Flux Diverters in Reducing AC Loss in a Single-Phase 6.5 MVA HTS Traction Transformer for Chinese High-Speed Train Carrying High-Order Harmonic Currents

open access: yesIEEE Access, 2022
The traction transformer is a critical electrical component in high-speed-trains. We are currently building a 6.5 MVA superconducting traction transformer which will increase transformer efficiency to 99%, halve the weight, and avoid the fire risk
Wenjuan Song   +5 more
doaj   +1 more source

Experimental studies of influence of DC and AC electric fields on bridging in contaminated transformer oil

open access: yes, 2015
Analysis of real operating condition revealed that HVDC transformers experience combined effect of DC biased AC electric field. The dynamics of pressboard particle in contaminated transformer oil under the influence of DC, AC and DC biased AC electric ...
Mahmud, S.   +4 more
core   +1 more source

An Electromagnetic Design of a Fully Superconducting Generator for Wind Application

open access: yesEnergies, 2021
A fully superconducting wind generator employs superconductors in stator and rotor to enable high torque density and low weight, that is, enable an ultra-light electric machine for wind application.
Yingzhen Liu   +8 more
doaj   +1 more source

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