Results 21 to 30 of about 1,159,066 (265)

Mirror-induced reflection in the frequency domain

open access: yesNature Communications, 2022
We show frequency domain mirrors that provide reflections of optical mode propagation in the frequency domain. We theoretically investigated the mirror properties and experimentally demonstrate it using polarization and coupled-resonator-based coupling ...
Yaowen Hu   +6 more
doaj   +1 more source

A Frequency-Domain Convolutional Neural Network Architecture Based on the Frequency-Domain Randomized Offset Rectified Linear Unit and Frequency-Domain Chunk Max Pooling Method

open access: yesIEEE Access, 2020
It is of great importance to construct a convolutional neural network architecture in the frequency domain to explore the theory of deep learning in the frequency domain.
Jinhua Lin, Lin Ma, Jingxia Cui
doaj   +1 more source

Linearized frequency domain Landau-Lifshitz-Gilbert equation formulation

open access: yesAIP Advances, 2023
We present a general finite element linearized Landau-Lifshitz-Gilbert equation (LLGE) solver for magnetic systems under weak time-harmonic excitation field.
Zhuonan Lin, Vitaliy Lomakin
doaj   +1 more source

Frequency Domain Analysis of Load Frequency Control Using PIDTune Model Standard

open access: yesAndalas Journal of Electrical and Electronic Engineering Technology, 2023
The load frequency control system aims to regulate the frequency in the electric power system at a normal value with a predetermined tolerance limit. In practice, the load frequency control system does not always operate optimally, therefore a controller
Heru Dibyo Laksono   +2 more
doaj   +1 more source

Comparison of methodological approaches to identify economic activity regularities in transition economy

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2011
Presented paper focuses on consideration and evaluation of methodical approaches to analyze cyclical structure character of economic activity in transition economy.
Jitka Poměnková   +2 more
doaj   +1 more source

Nonlinearity-compensation-free optical frequency domain reflectometry based on electrically-controlled optical frequency sweep

open access: yesJournal of Electronic Science and Technology, 2021
A nonlinearity-compensation-free optical frequency domain reflectometry (OFDR) scheme is proposed and experimentally demonstrated based on the electrically-controlled optical frequency sweep.
Fan Yang   +4 more
doaj   +1 more source

Cointegration in frequency domain [PDF]

open access: yesJournal of Time Series Analysis, 2002
Existence of a cointegration relationship between two time series in the time domain imposes restrictions on the series zero‐frequency behaviour in terms of their squared coherence, phase and gain, in the frequency domain. I derive these restrictions by studying cross‐spectral properties of a cointegrated bivariate system.
openaire   +8 more sources

Towards phase-stabilized Fourier domain mode-locked frequency combs

open access: yesCommunications Physics, 2022
Fourier domain mode-locked lasers provide coherent, wavelength swept light useful for imaging applications, but the phase relation between frequencies is not understood.
Christin Grill   +9 more
doaj   +1 more source

Robust Audio Watermarks in Frequency Domain

open access: yesJournal of Telecommunications and Information Technology, 2014
In this paper an audio watermarking technique is presented, using log-spectrum, dirty paper codes and LDPC for watermark embedding. This technique may be used as a digital communication channel, transmitting data at about 40 b/s.
Przemysław Dymarski, Robert Markiewicz
doaj   +1 more source

Frequency Domain Repercussions of Instantaneous Granger Causality

open access: yesEntropy, 2021
Using directed transfer function (DTF) and partial directed coherence (PDC) in the information version, this paper extends the theoretical framework to incorporate the instantaneous Granger causality (iGC) frequency domain description into a single ...
Luiz A. Baccalá, Koichi Sameshima
doaj   +1 more source

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