The results were obtained in the form of time series, frequency responses and phase trajectories.
The oscillation of system frequency may sustain and grow to cause a series frequency stability problem if no adequate damping is available.
Although, migraine constituted 60% of our study series, frequency of SLUH among migraineurs and those with non-migraine headaches did not reach statistical significance (11.5% vs 13%).
To analyze the fluctuations, we used the Fourier transform of 1-h time series (frequency resolution approximately 0.28 mHz); each spectrum was smoothed over nine frequency bands using a triangular moving window (final frequency resolution approximately 1.39 mHz).
The review also identifies the major challenges and opportunities for prospective research, including, a new scheme for modeling the inflow, a novel method for preprocessing time series frequency based on Fast Orthogonal Search FOSS) techniques, and Swarm Intelligence (SI) as an optimization approach.
This study, hence, mainly utilized the power spectrum analysis since it is a remarkably adequate method in terms of the time series frequency analysis of the raw data.
In recognition of this fact, a number of methods have been applied in an attempt to generate more informative descriptive data, including, for example, the application of bridge-coding algorithms to historically coded data (Sant et al, 2010; Turner et al, 2010; Maynadié et al, 2011) and the reporting of specialist hospital-based case-series frequencies (Yoon et al, 2010; Mozaheb et al, 2011).
When —for instance — applying an appropriate low-pass filter to a time series, all frequencies above the cutoff frequency are omitted, which results in a signal with less information.
Here, we consider Raman spectra as a time series of frequencies (Raman Shifts) and the output from frequency domain analysis based methods contains information about the underlying variations (frequencies) in the time series of Raman Shifts.
According to the methodology of the protocol, slots are allocated at periodic intervals, determined by a series of frequencies that approximate the requested rate.
