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Electrocardiogram (ECG) is almost periodic signals that echo the activity of the heart.
And thus these periodic signals have features of periodic statistics and spectral correlation which are absent in the noise only signals [10].
By introducing the periodic signal method, using 4-5 order variable step Runge Kutta method to carry on the numerical simulation, the bifurcation diagram of the control system is illustrated in Fig.
ref](t) of closed-loop feedback control system is a periodic signal, which can be decomposed into the summation of all harmonic components, that is, dc, fundamental component and any order harmonic component using FFT, its D-GP or R-GP, that is, [[GAMMA].
The 1-year periodic signal of the BU case series was associated with Nyong River flow from the end of 2005 to the end of 2009 (Figure 1) and with rainfall from the end of 2005 to the beginning of 2011 (online Technical Appendix Figure 3).
Figure 2 shows the difference function D(k) normalized to 1 and a threshold value used as criterion in selection of well periodic signal segments.
In that waveform, the movement of the chest wall shows up as slow periodic signal with approximately a four second period, while individual heartbeats can be seen at around 1/s (60 bpm).
To understand the operation of CIS, consider coherent sampling of a periodic signal such as a repeating bit pattern.
They then present chapters on digital image processing, fringe contouring and polynomial fitting, periodic signal phase detection and algorithm analysis, phase-shifting interferometry, spatial linear and circular carrier analysis, space-domain phase demodulation with a linear carrier, inteferogram analysis with Moire methods, interferogram analysis without a carrier, phase unwrapping, and wavefront curvature sensing.
Such sensitivity may arise from an effect known as stochastic resonance--the ability of randomly varying sound or other input to enhance the detection of a weak periodic signal.
If the sampling frequency is an integer of the periodic signal frequency, then the time delay resolution would be limited to the voltage equivalent to a LSB of the A/D converter divided by the maximum slew rate of the signal, as shown in Figure 4.
The IMP states that if any exogenous signal can be regarded as the output of an autonomous system, the inclusion of the model of the signal in a stable closed-loop system can promise ideal tracking or complete elimination of the periodic signal.