Results 11 to 20 of about 4,986 (224)

Analysis and Mitigation Strategies of Energy Backflow in an IPMSM Drive System With a Small DC‐Link Capacitor [PDF]

open access: yesIET Electric Power Applications
The energy backflow phenomenon is unavoidable in small dc‐link capacitor‐based PMSM drive systems, which is first identified and comprehensively analysed in this paper.
Jun Yan   +5 more
doaj   +4 more sources

Spectroscopy of two-dimensional interacting lattice electrons using symmetry-aware neural backflow transformations [PDF]

open access: yesCommunications Physics
Neural networks have shown to be a powerful tool to represent the ground state of quantum many-body systems, including fermionic systems. However, efficiently integrating lattice symmetries into neural representations remains a significant challenge.
Imelda Romero   +2 more
doaj   +3 more sources

Backflow Transformation for A=3 Nuclei with Artificial Neural Networks

open access: yesYuanzineng kexue jishu, 2023
A novel variational wave function defined as a Jastrow factor multiplying a backflow transformed Slater determinant was developed for A=3 nuclei. The Jastrow factor and backflow transformation were represented by artificial neural networks.
YANG Yilong, ZHAO Pengwei
doaj   +2 more sources

Energy backflow in strongly coupled non-Markovian continuous-variable systems [PDF]

open access: yesPhysical Review A, 2016
By employing the full counting statistics formalism, we characterize the first moment of energy that is exchanged during a generally non-Markovian evolution in non-driven continuous variables systems. In particular, we focus on the evaluation of the energy flowing back from the environment into the open quantum system.
Guarnieri, G.   +5 more
core   +12 more sources

Formation of an elongated region of energy backflow using ring apertures [PDF]

open access: yesКомпьютерная оптика, 2019
In this paper, we have investigated the focusing of a second-order cylindrical vector beam by using a high numerical aperture (NA) lens limited by a ring aperture using the Richards-Wolf formulae.
Sergey Stafeev, Victor Kotlyar
doaj   +2 more sources

Energy backflow in a focal spot of the cylindrical vector beam [PDF]

open access: yesКомпьютерная оптика, 2018
Using Richards-Wolf formulae it is shown that a tightly focused azimuthally-radially polarized m-th order laser beam with an arbitrary apodization function produces a reverse energy flow in the focal plane (m=2).
Sergey Stafeev   +2 more
doaj   +2 more sources

Energy dissipation characteristics of sharp-edged orifice plate

open access: yesAdvances in Mechanical Engineering, 2015
The energy loss coefficient, relating directly to the energy dissipation ratio, is an important index of this energy dissipater. In this article, this coefficient and its affecting parameters were analyzed by theoretical considerations, and their ...
Ai Wanzheng
doaj   +2 more sources

Enhanced optical trapping assisted by resonant energy backflow in a perforated dielectric microsphere

open access: yes, 2022
Optical energy flow inside a dielectric microsphere exposed to an optical wave is usually codirected with its wave vector. At the same time, if the optical field in a microparticle is in resonance with a high-quality spatial eigenmode, referred to as the whispering-gallery mode (WGM), at least two regions of reverse energy flow emerge in the ...
Geints, Yury E.   +2 more
openaire   +3 more sources

A Backflow Power Suppression Strategy for Dual Active Bridge Converter Based on Improved Lagrange Method

open access: yesEnergies, 2023
Dual-active bridge (DAB) converters are receiving increasing attention from researchers as a critical part of the power transmission of energy routers. However, the DAB converter generates a large backflow power in conventional control mode, and when the
Xinwen Zhang, Canlong Wang
doaj   +2 more sources

A Collaborative Modulation Method of Dual-Side Backflow Power Optimization and Zero-Voltage Switching for Dual Active Bridge

open access: yesEnergies
Dual active bridge (DAB) converters are widely used in DC microgrids because of their superior bidirectional energy flow regulation capability and characteristics, such as wide voltage gain and zero-voltage switching (ZVS).
Yun Zhang   +4 more
doaj   +2 more sources

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