Results 11 to 20 of about 4,622,355 (269)
Nonparametric frequency domain analysis of nonstationary multivariate time series [PDF]
, 2002 We analyse the properties of nonparametric spectral estimates when applied to long memory and trending nonstationary multiple time series. We show that they estimate consistently a generalized or pseudo-spectral density matrix at frequencies both close ...
Velasco, Carlos
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Fast finite difference time domain analysis of microstrip patch antennas [PDF]
, 1991 Although the finite-difference-time-domain method has been successfully used to model microstrip-fed patch antennas, this has been achieved using uniform grids.
Daniel, EM, Railton, CJ
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Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps
Energies, 2020 Light emitting diode (LED) lamps are now an established lighting technology, which is becoming prevalent in all load sectors. However, LED lamps are non-linear electrical loads, and their impact on distribution system voltage quality must be evaluated ...
Adam J. Collin +6 more
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On the Time Domain Error Caused By the Frequency Domain Sampling Rate in a Reverberation Chamber
IEEE Access, 2019 The time domain (TD) response of a reverberation chamber (RC) can be obtained from the inverse Fourier transform of the measured S-parameters in the frequency domain (FD).
Jianhua Xu, Yongjiu Zhao, Qian Xu
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Frontiers in Marine Science, 2023 To investigate the vibrational impact of vehicular traffic on the ancient Qiantang River seawall, on-site measurements of the seawall’s pulsation and forced vibrations under different vehicle speeds and axle loads were conducted.
Shenming Zhu +4 more
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工程科学学报, 2018 In the harsh marine environment, the traditional aluminum alloy coating has difficulty meeting the requirements of use, which can affect equipment performance.
SUN Xiao-feng +4 more
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A non-invasive method of glucose monitoring using FR4 material based microwave antenna sensor
Science and Engineering of Composite Materials, 2023 This work presents a unique non-invasive method for monitoring glucose levels in blood using a planar Yagi–Uda antenna as a microwave sensor. The proposed antenna, operating at 5.5 GHz, exhibits a directional radiation pattern with a peak gain of 6.74 ...
Nella Anveshkumar +3 more
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Time domain analysis of a wideband common-mode suppression filter for bent interconnects [PDF]
, 2011 A technique to efficiently reduce differential-to-common mode conversion occuring at a bend discontinuity in coupled microstrip lines is investigated. Total signal integrity in the interconnect structure has been improved by minimizing the differential ...
De Zutter, Daniël +4 more
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FDTD Simulation of Dispersive Metasurfaces With Lorentzian Surface Susceptibilities
IEEE Access, 2020 A Finite-Difference Time-Domain (FDTD) simulation of broadband electromagnetic metasurfaces based on direct incorporation of Generalized Sheet Transition Conditions (GSTCs) into a conventional Yee-cell region has been proposed for arbitrary wave ...
Tom J. Smy +3 more
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Timescale Spectra in High Energy Astrophysics [PDF]
, 2002 A technique of timescale analysis performed directly in the time domain has been developed recently. We have applied the technique to studying rapid variabilities of hard X-rays from neutron star and black hole binaries, gamma-ray bursts and terrestrial ...
D Kazanas +6 more
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