Výsledky vyhľadávania - "Fast-Fourier transform algorithms"

Is autonomic nervous system involved in restless legs syndrome during wakefulness? Autor Izzi, Francesca, Placidi, Fabio, Romigi, Andrea, Lauretti, Benedetta, Marfia, Girolama A., Mercuri, Nicola B., Marciani, Maria G., Rocchi, Camilla

“…) and fast Fourier transform algorithms in rest supine condition and during HUTT. There was a significant increase in systolic blood pressure values in supine rest…”
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Fast Discrete Fourier Transform of Complex Finite Signals with a Number of Samples Not Equal to a Power of Two with Limited Computing Function Autor Ponomarev, A. V., Ponomareva, N. V., Ponomareva, O. V.

“… Structure analysis of the discrete Fourier transform basis made it possible to eliminate a significant drawback of fast Fourier transform algorithms…”
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A Fast, Simplified Frequency-Domain Interpolation Method for the Evaluation of the Frequency and Amplitude of Spectral Components Autor Ferrero, A, Salicone, S, Toscani, S

“…The evaluation of the spectral components of a signal by means of discrete Fourier transform or fast Fourier transform algorithms is subject to leakage errors whenever the sampling frequency…”
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Optimal nonlinear fi ltering of stochastic processes in rescue radar Autor Sytnik, O.

“…Subject and Purpose. Smoke, fog, avalanches, debris of collapsed structures and other optically opaque obstacles in both natural and man-made disasters make optical sensors useless for detecting victims…”
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Initial Conditions Contribution in Frequency-Domain BEM Analysis Autor Mansur, W J, Abreu, A I, Carrer, J A M

“… (Fast Fourier Transform) algorithms. At the end of the paper four examples are presented in order to show the potentialities and accuracy of the approach…”
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Higher Time to Peak after Stent Implantation in Symptomatic High-Grade Intracranial Atherosclerotic Stenosis is Related to In-Stent Restenosis Autor Zhang, Longhui, Zhu, Haoyu, Zhang, Yupeng, Chen, Fangguang, Sun, Dapeng, Liu, Yufan, Jiang, Chuhan, Miao, Zhongrong, Jia, Baixue

“…), were derived from the time-density curve generated from digital subtraction angiography using the fast Fourier transform algorithm…”
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Electromyographic and Kinematic Analysis of the Flexion-Rotation Trunk Test Autor García-Vaquero, María P, Ruiz-Pérez, Iñaki, Barbado, David, Vera-Garcia, Francisco J

“…García-Vaquero, MP, Ruiz-Pérez, I, Barbado, D, and Vera-Garcia, FJ. Electromyographic and kinematic analysis of the flexion-rotation trunk test. J Strength…”
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Modeling cracks and inclusions near surfaces under contact loading Autor Zhou, Kun, Wei, Rongbing

“…In this work, a semi-analytic solution is developed for multiple cracks and inhomogeneous inclusions of arbitrary shape beneath a half-space surface subject to contact loading…”
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Extended C37.118.1 PMU Algorithms for Joint Tracking of Fundamental and Harmonic Phasors in Stressed Power Systems and Microgrids Autor Chakir, M., Kamwa, I., Le Huy, H.

“…) with the capability of accurately tracking single-phase harmonic phasors subject to varying nominal frequency and out-of band interharmonic interference…”
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Changes in Electromagnetic Activity Following Osteopathic Manipulative Treatment: A Novel Assessment Using Induction Sensors Autor Savla, Paras, Brazdzionis, James, Marino, Maxwell, Siddiqi, Imran, Sweiss, Raed, King, Christopher, Miulli, Dan E

“… This study aimed to evaluate whether these EMF changes could be identified post-treatment. Methods A pilot study was conducted with 35 subjects who had EMF measurements…”
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Tissue sodium concentration and sodium T 1 mapping of the human brain at 3 T using a Variable Flip Angle method Autor Coste, Arthur, Boumezbeur, Fawzi, Vignaud, Alexandre, Madelin, Guillaume, Reetz, Kathrin, Le Bihan, Denis, Rabrait-Lerman, Cécile, Romanzetti, Sandro

“…) maps using the VFA method. Images are reconstructed using the non-uniform Fast Fourier Transform algorithm and TSC maps are corrected for possible…”
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Skin blood flowmotion response to insulin iontophoresis in normal subjects Autor Rossi, M., Maurizio, S., Carpi, A.

“…). Using a Fast Fourier transform algorithm, power density (PD) of the total flowmotion spectrum, from 0.009…”
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Short- and long-term reproducibility of time and frequency domain heart rate variability measurements in normal subjects Autor Pitzalis, M V, Mastropasqua, F, Massari, F, Forleo, C, Di Maggio, M, Passantino, A, Colombo, R, Di Biase, M, Rizzon, P

“… (total power, low frequency, and high frequency) were made by means of both the Fast Fourier Transform algorithm (FFT…”
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Satellite borne radar altimetry : empirical orbit refinement and ocean signal recovery techniques Autor Jolly, Gordon W

“…Measurements of the sea surface obtained by satellite borne radar altimetry are irregularly spaced and contaminated with various modelling and correction…”
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Tissue sodium concentration and sodium T1 mapping of the human brain at 3 T using a Variable Flip Angle method Autor Coste, Arthur, Boumezbeur, Fawzi, Vignaud, Alexandre, Madelin, Guillaume, Reetz, Kathrin, Le Bihan, Denis, Rabrait-Lerman, Cécile, Romanzetti, Sandro

“…) maps using the VFA method. Images are reconstructed using the non-uniform Fast Fourier Transform algorithm and TSC maps are corrected for possible…”
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Numerical approach to second-order canonical perturbation theory in the planetary 3-body problem: Application to exoplanets Autor Alnajjarine, Aya, Mogavero, Federico, Laskar, Jacques

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Inverse coupling between ultradian oscillations in delta wave activity and heart rate variability during sleep Autor Brandenberger, Gabrielle, Ehrhart, Jean, Piquard, François, Simon, Chantal

“…)] calculated using spectral analysis of R-R intervals. EEG spectra were analyzed using a fast Fourier transform algorithm. Results…”
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Waking EEG in primary insomnia Autor Wolynczyk-Gmaj, Dorota, Szelenberger, Waldemar

“… Waking EEG from 21 scalp electrodes was subjected to spectral analyses using a fast Fourier transform algorithm…”
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Orthostatic sympathetic derangement in subjects with fibromyalgia Autor Martínez-Lavín, M, Hermosillo, A G, Mendoza, C, Ortiz, R, Cajigas, J C, Pineda, C, Nava, A, Vallejo, M

“… Spectral analysis of R-R intervals was done by the fast Fourier transform algorithm. Analyses of the different frequency components revealed significant difference between the 2 groups in the low frequency (0.050-0.150 Hz…”
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Sympathovagal balance of the heart in subjects with spinal cord injury Autor Grimm, D R, De Meersman, R E, Almenoff, P L, Spungen, A M, Bauman, W A

“… Measurements were collected at baseline and during provocative maneuvers. Spectral analysis using a fast-Fourier transform algorithm revealed two spectral components of HRV, termed low frequency (LF…”
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