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Showing 1 to 11 of 11 for “"power spectral analysis"”.
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Randomized estimates in power spectral analysis
… specifically with the problem of estimating the power spectrum associated with a random process. It has shown how the power spectral density function φ(ω) can be used to specify completely a stationary Gaussian process. Estimation of this function is therefore one of the fundamental problems in …
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POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
… myoelectric signals (MES) requires the use of power spectral analysis for effective characterisation. Spectral changes during different types of muscular activity are monitored using spectral parameters like mean power frequency, ratios of powers in several arbitrarily chosen spectral bands and …
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QT variability calculation using a template matching algorithm and power spectral analysis
ECG interval measurement and variability analysis has proven to be a useful tool in investigating autonomic nervous system function. Traditionally, the R to R interval has been the thrust of research conducted in this field. QT variability is another topic on which little research has been done. …
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Measurement of the effectiveness of enhanced external counterpulsation on heart rate variability for patients with myocardial ischemia
… as data from the subjects. Frequency domain-power spectral analysis was performed on the data obtained using the LabVIEW 5.0 software. The time domain-SDNN analysis was also performed using MATLAB. The results of this study fail to indicate conclusively that the EECP treatment affects the …
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Effects of Proactive and Retroactive Augmented Information on Physiological Responses in Learning a Novel Motor Skill
… research by utilizing the physiological index, power spectral analysis of heart rate variability, previously shown to be sensitive to the degree of cognitive effort invested during the performance of a motor task (e.g., increase cognitive effort results in increased LF/HF ratio). Participants …
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Theory and Application of Joint Time-Frequency Analysis On Health Monitoring of Electric Cable and Guided-Waves Detection of Structural Corrosion
… In both applications, joint time-frequency analysis is found to be an effective tool. </p> <p> The Joint Time-Frequency Domain Reflectometry (JTFDR) which is based on time-frequency cross-correlation function is applied to health monitoring of XLPE, EPR and SIR insulated cables in …
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Electrophysiological analysis of the sleep onset period : a comparison between subjects with long term insomnia complaints associated with mild traumatic brain injury and matched controls /
… proportion ofREM sleep, reduced delta sleep); 2) Power spectral analysis was conducted over the SOP to determine if the sleep onset signature of those with MTBI would be similar to psychophysiological insomniacs (characterized by increased cortical arousal). Finally, exploratory analyses examined …
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Pilot Variability During Pilot-Induced Oscillation
… or increased pilot gain). By performing analysis in the frequency domain, determining such oscillations becomes easier. Using spectrograms and power spectral density functions, the frequency content of a signal in the pilot-aircraft system can also be investigated. An F-14 flight test was …
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Mathematical modelling and in-process monitoring techniques for cutting tools.
… all the essential information for statistical analysis and for the development of mathematical models. The testing conditions are chosen to reasonably conform with the practical requirements. Multi-coated carbide tool inserts [Sandvik GC435] are used to cut an alloy steel [EN 19] under normal …
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Measurement of Autonomic Function in Renal Disease and Diabetes
… SDNN, SDANN, RMSSD; frequency-domain: total power, low and high frequency) and symptomatology were obtained.</p> <p>Study 1 examined the development and psychometric testing of the Autonomic Symptom Checklist (ASC), an instrument designed to assess autonomic symptomatology, with uremic …