Results 1 to 10 of about 1,008,820 (154)

Spectral domain analysis of double screen frequency selective surfaces

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a numerical investigation for a double screen frequency selective surface (FSS) with perfectly conducting rectangular patch elements. The analysis uses a full wave technique to obtain the scattering characteristics.
Antonio Luiz Pereira de Siqueira Campos   +1 more
doaj   +1 more source

Frequency domain based DC fault analysis for bipolar HVDC grids

open access: yesJournal of Modern Power Systems and Clean Energy, 2017
This paper proposes a frequency domain based methodology to analyse the influence of High Voltage Direct Current (HVDC) configurations and system parameters on the travelling wave behaviour during a DC fault.
Mian WANG, Jef BEERTEN, Dirk Van HERTEM
doaj   +1 more source

Dynamic Tests on a Concrete Slab with a Tuned Mass Damper

open access: yesMATEC Web of Conferences, 2015
Nowadays, structures became more slender and flexible due to lighter materials with great resistance, compared to traditional materials used in construction. This fact provides to structural systems with low natural frequencies. High amplitude vibrations
Campuzano Carmona Jorge Eliécer   +2 more
doaj   +1 more source

Comprehensive bearing condition monitoring algorithm for incipient fault detection using acoustic emission [PDF]

open access: yesJurnal Tribologi, 2014
The bearing reliability plays major role in obtaining the desired performance of any machine. A continuous condition monitoring of machine is required in certain applications where failure of machine leads to loss of production, human safety and ...
Amit R. Bhende   +2 more
doaj  

Frequency Domain Analysis of Lossy and Non-Uniform Twisted Wire Pair

open access: yesIEEE Access, 2019
In the study of the frequency domain crosstalk for twisted pair, the traditional alternating inversion model is often built under the ideal condition of lossless and uniform media, ignoring the length of the twisted section.
Yaxiu Sun   +3 more
doaj   +1 more source

Time-frequency Domain Analysis of an Automobile Transmission

open access: yesJixie chuandong, 2017
As a whole,the automobile transmission producing vibration and noise is an inevitable result under the action of exciting force,the bearing,shaft and box has influence on the vibration and noise of the gearbox.
Ma Weijin   +3 more
doaj  

Frequency Domain Analysis of Continuous Systems with Viscous Generalized Damping

open access: yesShock and Vibration, 2004
This paper deals with the effects of generalized damping distributions on vibrating linear systems. The attention is focused on continuous linear systems with distributed and possibly non-proportional viscous damping, which are studied in terms of modal ...
S. Sorrentino   +2 more
doaj   +1 more source

Frequency-domain analysis of biomolecular sequences [PDF]

open access: yesBioinformatics, 2000
Abstract Motivation: Frequency-domain analysis of biomolecular sequences is hindered by their representation as strings of characters. If numerical values are assigned to each of these characters, then the resulting numerical sequences are readily amenable to digital signal processing.
openaire   +2 more sources

Convergence Analysis of EFOP Estimate Based on Frequency Domain Smoothing

open access: yesJournal of Applied Mathematics, 2013
The classic methods for frequency domain transfer function estimation such as the Empirical Transfer Function Estimate (ETFE) and cross spectral method do not work well when the noise signal is complex.
Yulai Zhang, Kueiming Lo, Yang Su
doaj   +1 more source

Distributed Temperature Sensing through Network Analysis Frequency-Domain Reflectometry

open access: yesSensors
In this paper, we propose and demonstrate a network analysis optical frequency domain reflectometer (NA-OFDR) for distributed temperature measurements at high spatial (down to ≈3 cm) and temperature resolution. The system makes use of a frequency-stepped,
Rizwan Zahoor   +3 more
doaj   +1 more source

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