Results 21 to 30 of about 1,243,202 (267)

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

Multi-Distance Frequency-Domain Optical Measurements of Coherent Cerebral Hemodynamics

open access: yesPhotonics, 2019
We report non-invasive, bilateral optical measurements on the forehead of five healthy human subjects, of 0.1 Hz oscillatory hemodynamics elicited either by cyclic inflation of pneumatic thigh cuffs, or by paced breathing. Optical intensity and the phase
Giles Blaney   +4 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

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

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

Joint Identification of Infinite-Frequency Added Mass and Fluid-Memory Models of Marine Structures [PDF]

open access: yesModeling, Identification and Control, 2008
This paper addresses the problem of joint identification of infinite-frequency added mass and fluid memory models of marine structures from finite frequency data.
Tristan Perez, Thor I. Fossen
doaj   +1 more source

Evidence‐Informed Multidisciplinary Consensus Guidance for the Psychosocial Care of Adolescents With High‐Risk Cancer: Recommendations From the Italian Association of Pediatric Hematology and Oncology

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adolescents with high‐risk cancer face complex developmental, psychosocial, and ethical challenges that extend beyond disease‐directed treatment. Although international recommendations exist for communication, psychosocial care, pediatric palliative care, survivorship, and shared decision‐making, these have largely evolved within ...
Johanna M. C. Blom   +15 more
wiley   +1 more source

Statistical analysis of audible noise generated by AC corona discharge from single corona sources

open access: yesHigh Voltage, 2018
Time-domain waveforms of sound pressure pulses generated by alternate current (AC) corona discharge from single corona sources are measured. The pulse amplitude and time interval of sound pressure pulses in positive and negative half cycles are analysed ...
Xuebao Li   +4 more
doaj   +1 more source

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