Results 81 to 90 of about 306,242 (273)

Double Helical Plasmonic Antennas

Advanced Functional Materials, EarlyView.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source

Suppression Strategy of Background Harmonic Voltage Based on Cooperative Control in Weak Grid

CSEE Journal of Power and Energy Systems
Distributed generation (DG) systems with renewable energy are often connected to weak grids. However, there may be large background harmonics in weak grids, which can easily cause power quality issues at the point of common coupling (PCC).
Xiuhui Chai, Wenqing Nie, Chunjiang Zhang, Xiaojun Zhao, Songlin Zeng   +4 more
doaj   +1 more source

Quantum Harmonic Oscillator in a Time Dependent Noncommutative Background

International Journal of Theoretical Physics
19 pages Latex, To appear in International Journal of Theoretical ...
Dutta, Manjari, Ganguly, Shreemoyee, Gangopadhyay, Sunandan   +2 more
openaire   +2 more sources

Miniature Nanomesh Mechano‐Acoustic Sensor with Wide Linear Dynamic Range, Broad Bandwidth, and Flat Frequency Response

Advanced Functional Materials, EarlyView.
A miniaturized mechano‐acoustic sensor is developed using an electrospun PVDF nanomesh as the diaphragm in a capacitive sensor structure. Unlike conventional nanomesh‐based sensors, it achieves high linear sensitivity, a broad and flat frequency response, and a compact form factor.
Jeng‐Hun Lee, Kang Hyuk Cho, Seojin Yun, Siyoung Lee, Woongji Kim, Yunsik Kim, Wonkyu Moon, Yoonyoung Chung, Kilwon Cho   +8 more
wiley   +1 more source

Method for determining the harmonic contribution of consumer installations based on the application of passive filters

IET Generation, Transmission & Distribution
The paper presents a new method for estimating the contribution of distortion sources based on the application of passive harmonic filters. The method does not require the measurement of harmonic network impedance and is based on the measurement of ...
Aleksandr Skamyin
doaj   +1 more source

The emergence of space-time gravitational physics as an effective theory from the c=1 matrix model

, 1997
We discuss further a recent space-time interpretation of the $c=1$ matrix model which retains both sides of the inverted harmonic oscillator potential in the underlying free fermion theory and reproduces the physics of the discrete state moduli of two ...
Avan, Avinash Dhar, Brezin, Brezin, Das, Das, Dhar, Dhar, Dhar, Dhar, Di Francesco, Di Francesco, Douglas, Ginsparg, Gross, Gross, Gross, Mandal, Minic, Moore, Natsuume, O'Loughlin, Parisi, Polchinski, Polchinski, Polchinski, Polchinski, Polyakov, Sengupta, Wilten, Witten   +30 more
core   +2 more sources

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

Advanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou, Yu Mao, Mengyao Chang, Ziyun Wang, Wenke Xie, Cuizhu Ye, Shanghai Wei, Lars Thomsen, Geoffrey I. N. Waterhouse   +8 more
wiley   +1 more source

Secondary sideband harmonic emission characteristics of individual/multi-parallel grid-connected inverters

International Journal of Electrical Power & Energy Systems
The analog/digital (A/D) sampling and the pulse width modulation (PWM) processes of grid-connected inverters have sideband effects. Under the influence of sideband effects, the interaction between background harmonics in the distribution network and grid-
Shaobo Xu, Shun Tao, Yonghai Xu
doaj   +1 more source

Novelty method for the utility harmonic impedance estimation based on Gaussian mixed model

IET Generation, Transmission & Distribution, 2020
The accurate estimation of harmonic impedance on the utility side of a point of common coupling (PCC) is much important to harmonic control, harmonic emission level, and harmonic responsibility analysis.
Zhirong Tang, Qin Shu, Fangwei Xu, Yue Jiang   +3 more
doaj   +1 more source

Chen's conjecture and epsilon-superbiharmonic submanifolds of Riemannian manifolds

, 2013
B.-Y. Chen famously conjectured that every submanifold of Euclidean space with harmonic mean curvature vector is minimal. In this note we establish a much more general statement for a large class of submanifolds satisfying a growth condition at infinity.
Wheeler, Glen
core   +1 more source