Results 31 to 40 of about 1,353,376 (300)

Frequency-Domain Analysis of Linear Time-Periodic Systems [PDF]

open access: yes, 2004
In this paper, we study convergence of truncated representations of the frequency-response operator of a linear time-periodic system. The frequency-response operator is frequently called the harmonic transfer function. We introduce the concepts of input,
Bernhardsson, Bo   +2 more
core   +1 more source

Mapping of Agricultural Subsurface Drainage Systems Using a Frequency-Domain Ground Penetrating Radar and Evaluating Its Performance Using a Single-Frequency Multi-Receiver Electromagnetic Induction Instrument

open access: yesSensors, 2020
Subsurface drainage systems are commonly used to remove surplus water from the soil profile of a poorly drained farmland. Traditional methods for drainage mapping involve the use of tile probes and trenching equipment that are time-consuming, labor ...
Triven Koganti   +5 more
doaj   +1 more source

Frequency Synchronization in Frequency Domain OFDM-IM based WLAN Systems

open access: yesJournal of Communications Software and Systems, 2023
The next-generation of wireless local area network systems are being conceptualized with new applications, smart devices and use cases which mandate unprecedented levels of high data rates, spectral efficiency, reliability, low latency and high energy ...
Lalitha H, Navin Kumar
doaj   +1 more source

Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS

open access: yesSensors, 2022
To achieve multi-gas measurements of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors under a frequency-division multiplexing mode with a narrow modulation frequency interval, we report a frequency-domain detection method. A CH4 absorption line
Xiang Chen   +6 more
doaj   +1 more source

Iterative Frequency-Domain Response of Floating Offshore Wind Turbines with Parametric Drag

open access: yesJournal of Marine Science and Engineering, 2018
Methods for coupled aero-hydro-servo-elastic time-domain simulations of Floating Offshore Wind Turbines (FOWTs) have been successfully developed. One of the present challenges is a realistic approximation of the viscous drag of the wetted members of the ...
Frank Lemmer, Wei Yu, Po Wen Cheng
doaj   +1 more source

Implementation of wavelet transform based on switched current circuits

open access: yesDianzi Jishu Yingyong, 2018
In order to meet the engineering application requirement for low-power and real-time signal processing, an implementation of wavelet transform using switched current(SI) technique is presented in this paper.
Hu Qinchun   +5 more
doaj   +1 more source

Time- vs. Frequency-domain Identification of Parametric Radiation Force Models for Marine Structures at Zero Speed [PDF]

open access: yesModeling, Identification and Control, 2008
The dynamics describing the motion response of a marine structure in waves can be represented within a linear framework by the Cummins Equation. This equation contains a convolution term that represents the component of the radiation forces associated ...
Tristan Perez, Thor I. Fossen
doaj   +1 more source

Vehicle model response in frequency domain [PDF]

open access: yesMATEC Web of Conferences, 2020
The offered article deals with one of the possibilities of numerical analysis of the vehicle response in frequency domain. It works with quarter model of vehicle.
Melcer Jozef, Valašková Veronika
doaj   +1 more source

Evaluating the indicators of a heart rate variability analysis in dogs using Poincaré plots

open access: yesVeterinární Medicína
Heart rate variability analyses using Poincaré plots can be useful for evaluating the autonomic nervous system function. However, the interpretation of the quantitative indicators of Poincaré plots remains controversial.
T Kimura   +8 more
doaj   +1 more source

Measuring Online Battery AC Resistance Using a DC-DC Converter With Time and Frequency Hybrid Method

open access: yesIEEE Access
The estimation of battery state is important for ensuring the stability of batteries. The AC resistance of a battery is one of the factors used to estimate the battery state, and is measured using a Fast Fourier Transform (FFT), a technique that analyzes
Seong-Jong Kim   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy