Results 31 to 40 of about 211,702 (296)

Dual-Gap Dual-Pole Composite Machine for Mechanical Rotor Position Estimation [PDF]

open access: yes, 2021
Position sensorless control has been widely studied for electrical rotor position estimation. However, because of the magnetic periodicity, mechanical rotor position sensorless control of multipole electric machine was hardly reported.
Nie, Shuxin   +5 more
core   +1 more source

Chromium and copper dual-doped zinc sulfide nanoparticles: Synthesis, structural, morphological and optical properties

open access: yesResults in Optics, 2023
Copper (Cu) and chromium (Cr) dual-doped zinc sulfide (ZnS) nanoparticles (NPs) were fabricated via a chemical co-precipitation technique at 24±°C without any capping agent used.
Annas Al-Sharabi   +3 more
doaj   +1 more source

Quiescent Gap Solitons in Coupled Nonuniform Bragg Gratings with Cubic-Quintic Nonlinearity

open access: yesApplied Sciences, 2021
We study the stability characteristics of zero-velocity gap solitons in dual-core Bragg gratings with cubic-quintic nonlinearity and dispersive reflectivity. The model supports two disjointed families of gap solitons (Type 1 and Type 2).
Afroja Akter   +2 more
doaj   +1 more source

Permanent Magnet Motor Design for Satellite Attitude Control With High Torque Density and Low Torque Ripple

open access: yesIEEE Access, 2020
This paper proposes a high-precision permanent magnet (PM) motor primarily used for the satellite attitude control. Considering aerospace applications, the dynamic response, weight and torque ripple are primarily concerns.
Po-Huan Chou   +4 more
doaj   +1 more source

Factors Influencing the Knowledge Gap regarding Influenza and Influenza Vaccination in the Context of COVID-19 Pandemic: A Cross-Sectional Survey in China

open access: yesVaccines, 2022
In the context of the COVID-19 global pandemic, promoting influenza knowledge and vaccine helps reduce the risk of dual pandemics and relieve the pressure on healthcare systems.
Huimin Yin   +3 more
doaj   +1 more source

A Critical Analysis of the Scientific and Commercial Rationales for the De Novo Synthesis of Horsepox Virus

open access: yesmSphere, 2018
This article evaluates the scientific and commercial rationales for the synthesis of horsepox virus. I find that the claimed benefits of using horsepox virus as a smallpox vaccine rest on a weak scientific foundation and an even weaker business case that
Gregory D. Koblentz
doaj   +1 more source

CFD Analysis and Performance Evaluation of an Interlocked (Negative-Gap) Savonius Dual-Rotor Configuration

open access: yesWind
This study investigates whether aerodynamic interaction effects in an interlocked (negative-gap) counter-rotating dual Savonius rotor configuration can improve the efficiency of drag-based vertical-axis wind turbines in urban wind conditions.
Konrad M. Hartung   +2 more
doaj   +1 more source

An effective screening model for subjective cognitive decline in community-dwelling older adults based on gait analysis and eye tracking

open access: yesFrontiers in Aging Neuroscience
ObjectiveTo evaluate the effectiveness of multimodal features based on gait analysis and eye tracking for elderly people screening with subjective cognitive decline in the community.MethodsIn the study, 412 cognitively normal older adults aged over 65 ...
Chenxi Hao   +13 more
doaj   +1 more source

AdS bulk locality from sharp CFT bounds

open access: yesJournal of High Energy Physics, 2021
It is a long-standing conjecture that any CFT with a large central charge and a large gap ∆gap in the spectrum of higher-spin single-trace operators must be dual to a local effective field theory in AdS.
Simon Caron-Huot   +3 more
doaj   +1 more source

Symmetry and asymmetry from MEMS variable capacitor by nonlinear micro stoppers

open access: yesMechanics & Industry, 2021
Mechanical stoppers in MEMS capacitive systems can dramatically affect electrical performances and result in complicated mechanical dynamic responses.
Zhu Jianxiong, Shi Yunde, Ma Feng
doaj   +1 more source

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