Results 31 to 40 of about 1,981,461 (291)

Statistical significance of fine structure in the frequency spectrum of Aharonov-Bohm conductance oscillations [PDF]

, 2003
We discuss a statistical analysis of Aharonov-Bohm conductance oscillations measured in a two-dimensional ring, in the presence of Rashba spin-orbit interaction.
A. F. Morpurgo, A. Stern, A.F. Morpurgo, A.G. Aronov, A.G. Malshukov, B.L. Altshuler, C.W.J. Beenakker, D. Loss, F. E. Meijer, H.A. Engel, J. Nitta, J. Nitta, J. Nitta, J.B. Yau, R. Washburn, S.L. Zhu, T. Koga, T. Koga, T. M. Klapwijk, Y.S. Yi   +19 more
core   +4 more sources

A synchronous scanning measurement method for resistive sensor arrays based on Hilbert-Huang transform

Journal of Measurement Science and Instrumentation, 2023
The current spectrum analysis method cannot perform synchronous scanning on the resistance sensor array. The Hilbert-Huang transform (HHT) with improved empirical mode decomposition is innovatively applied for the spectrum analysis of the response signal
TONG Zhixue, FENG Wenjun, CAO Hengyuan, CHANG Sheng, ZHANG Xuefeng   +4 more
doaj  

A Comparative Study between Machine Learning Algorithm and Artificial Intelligence Neural Network in Detecting Minor Bearing Fault of Induction Motors

Energies, 2019
Most of the mechanical systems in industries are made to run through induction motors (IM). To maintain the performance of the IM, earlier detection of minor fault and continuous monitoring (CM) are required.
Shrinathan Esakimuthu Pandarakone, Yukio Mizuno, Hisahide Nakamura   +2 more
doaj   +1 more source

Influence of cavity lifetime on high-finesse microcavity two-photon absorption photodetectors [PDF]

, 2007
For optical pulse incidence as compared with continuous-wave incidence, the enhancement of two-photon absorption inside a high-finesse planar microcavity is reduced, the pulse inside the cavity and the cavity spectrum are broadened.
Barry, Liam P., Bradley, Ann Louise, Donegan, John Francis, Guo, Wei Hua, Lynch, Michael, O'Dowd, John   +5 more
core   +1 more source

The effect of impeller–diffuser interactions on diffuser performance in a centrifugal compressor

Engineering Applications of Computational Fluid Mechanics, 2016
The unsteady phenomenon abounds in centrifugal compressors and significantly affects the compressor performance. In this paper, unsteady simulations are carried out to investigate the aerodynamic performance of a process-unshrouded centrifugal compressor
Peng-Fei Zhao, Yan Liu, Hong-Kun Li, Xiao-Fang Wang, Jin-Guang Yang   +4 more
doaj   +1 more source

Diffusion-induced dephasing in nanomechanical resonators [PDF]

, 2010
We study resonant response of an underdamped nanomechanical resonator with fluctuating frequency. The fluctuations are due to diffusion of molecules or microparticles along the resonator.
A. Isacsson, A. N. Cleland, H. Risken, J. Atalaya, L. Landau, M. A. Ivanov, M. Gitterman, M. I. Dykman, M. I. Dykman   +8 more
core   +2 more sources

Group Iterative Spectrum Thresholding for Super-Resolution Sparse Spectral Selection [PDF]

, 2013
Recently, sparsity-based algorithms are proposed for super-resolution spectrum estimation. However, to achieve adequately high resolution in real-world signal analysis, the dictionary atoms have to be close to each other in frequency, thereby resulting ...
Li, Huanghuang, She, Yiyuan, Wang, Jiangping, Wu, Dapeng   +3 more
core   +1 more source

The Ricker wavelet and the Lambert W function [PDF]

, 2014
The Ricker wavelet has been widely used in the analysis of seismic data, as its asymmetrical amplitude spectrum can represent the attenuation feature of seismic wave propagation through viscoelastic homogeneous media.
Wang, Y
core   +1 more source

Study of the Reasonable Acquisition Frequency Evaluation Method of Midspan Deflection of Medium- and Small-Span Beam Bridges

Applied Sciences, 2023
The objective of this study is to further promote and apply the structural monitoring system to medium and small bridges, given the relative delays in scientific research, technical specifications, and engineering practice for the safety monitoring of ...
Zhengjun Tan, Haijun Wu, Qingcui Tang
doaj   +1 more source

A spectrum-of-spectrum filtering method to extract direct and multipath arrivals from simulations and measurements

MethodsX, 2023
In measurements and numerical modelling of wave propagation, undesired interference between direct and multipath arrivals can be reduced using Fourier-based signal processing methods.
Eivind Nag Mosland, Per Lunde, Jan Kocbach   +2 more
doaj   +1 more source