Results 31 to 40 of about 2,435,332 (149)

UWB microstrip filter design using a time-domain technique [PDF]

, 2005
A time-domain technique is proposed for ultra-wideband (UWB) microstrip-filter design. The design technique uses the reflection coefficient (S11) specified in the frequency domain. When the frequency response of the UWB filter is given, the response will
Bennett, Bertoni, Chahravarty, Cusick, Foerster, Levy, Mokari, Pozar, Roberts, Sobhy, Tascone   +10 more
core   +1 more source

Evaluation of data representation techniques for vibration based road surface condition classification

Scientific Reports
The accurate classification of road surface conditions plays a vital role in ensuring road safety and effective maintenance. Vibration-based techniques have shown promise in this domain, leveraging the unique vibration signatures generated by vehicles to
E. Raslan, Mohammed F․ Alrahmawy, Y. A. Mohammed, A. S․ Tolba   +3 more
doaj   +1 more source

A Comprehensive Evaluation of Features and Simple Machine Learning Algorithms for Electroencephalographic-Based Emotion Recognition

Applied Sciences
The study of electroencephalographic (EEG) signals has gained popularity in recent years because they are unlikely to intentionally fake brain activity.
Mayra Álvarez-Jiménez, Tania Calle-Jimenez, Myriam Hernández-Álvarez   +2 more
doaj   +1 more source

An explicit mapping between the frequency domain and the time domain representations of nonlinear systems [PDF]

, 2005
Explicit expressions are presented that describe the input-output behaviour of a nonlinear system in both the frequency and the time domain. The expressions are based on a set of coefficients that do not depend on the input to the system and are ...
Bassani, Billings, Brazil, Jackson, Landau, Mandal, Marissa Condon, Mees, Peyton Jones, Peyton Jones, Peyton Jones, Rossen Ivanov, Schetzen, Smet, Ulriksson, Volterra   +15 more
core   +3 more sources

Association between Disease Severity, Heart Rate Variability (HRV) and Serum Cortisol Concentrations in Horses with Acute Abdominal Pain

Animals, 2020
Heart rate variability (HRV) is a noninvasive technique to detect changes in the autonomous nervous system. It has rarely been investigated in horses with colic.
Heidrun Gehlen, Maria-Dorothee Faust, Remigiusz M. Grzeskowiak, Dagmar S. Trachsel   +3 more
doaj   +1 more source

Short-time Fourier transform laser Doppler holography [PDF]

, 2013
We report a demonstration of laser Doppler holography at a sustained acquisition rate of 250 Hz on a 1 Megapixel complementary metal-oxide-semiconductor (CMOS) sensor array and image display at 10 Hz frame rate.
Atlan, Michael, Samson, Benjamin
core   +4 more sources

Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis

International Journal of Rotating Machinery, 2016
Unsteady flow around an oscillating plate cascade and that through a single compressor rotor subject to vibration have been computationally studied, aimed at examining the predictive ability of two low fidelity frequency methods compared with a high ...
M. T. Rahmati
doaj   +1 more source

2D CNN-Based Multi-Output Diagnosis for Compound Bearing Faults under Variable Rotational Speeds

Machines, 2021
Bearings prevent damage caused by frictional forces between parts supporting the rotation and they keep rotating shafts in their correct position. However, the continuity of work under harsh conditions leads to inevitable bearing failure.
Minh-Tuan Pham, Jong-Myon Kim, Cheol-Hong Kim   +2 more
doaj   +1 more source

Calculation of nonzero-temperature Casimir forces in the time domain

, 2010
We show how to compute Casimir forces at nonzero temperatures with time-domain electromagnetic simulations, for example using a finite-difference time-domain (FDTD) method.
A. Taflove, Alejandro W. Rodriguez, Alexander P. McCauley, Jacob K. White, K. A. Milton, Kai Pan, L. D. Landau, L. D. Landau, M. T. Homer Reid, Steven G. Johnson   +9 more
core   +1 more source

Nonlinear time domain and multi-scale frequency domain feature fusion for time series forecasting

Scientific Reports
Time series analysis plays a critical role in informed decision-making across domains like energy management, transportation systems, and financial markets.
Kejiang Xiao, Yefeng Li, Yaning Dong, Wenqi Yang, Binting Yao, Liang Chen   +5 more
doaj   +1 more source