Instantaneous FrequencyEnsemble Empirical Mode Decomposition (EEMD)To investigate the value of decomposed short-time digital volume pulse (DVP) signals in discerning systemic vascular anomaly in diabetic patient
Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with theinstantaneousvalue of the modulating signal. 频率调制:载波的频率依照调校讯号的瞬时值而改变的一种调制。 属类:行业术语-印刷- ...
IMFn(t) must also be a monocomponent function. Eq. (13) allows the amplitude and the instantaneous frequency to be presented in a 3-D plot, in which the amplitude is represented by the height in the time–frequency plane. This time–frequency distribution...
The core idea of the HHT is to use Empirical Mode Decomposition (EMD) to decompose a time-series signal into Intrinsic Mode Functions (IMFs) with a trend and then apply the Hilbert spectral analysis (HSA) method to the IMFs to obtain instantaneous frequency data. The HHT assumes that any...
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In 2012 [1], the triboelectric nanogenerator (TENG) was invented to collect and convert mechanical energy into electrical energy, with the merits of lightweight, low cost [2], and low-frequency energy harvesting [3]. Furthermore, because it can capture energy from a variety of scenarios, ...
The runout parameters were inferred from the frequency components of the cutting forces. This paper presents a new methodology to calibrate the cutting force coefficients and the cutter runout parameters based on the measurement of the cutting forces. Both the radial and the axis tilt runout ...
John P. Castagna et al.; Instantaneous spectral analysis: Detection of low-frequency shadows associated with hydrocarbons, The Leading Edge, Feb. 2003, pp. 120-127, 14 Figs. John P. Castagna et al.; The Use of Spectral Decomposition as a Hydrocarbon Indicator, Gas TIPS, Summer 2002, pp...
Accordingly, another object of this invention is to provide such an indicator. Therefore, there is added to the indicator of the instant invention, means for generating another D.C. reference signal having an amplitude related to the nominal frequency of the alternating voltage signal and ...
(SIG) series of protocols, specifications, profiles, and so forth. Other examples of shorter range wireless networks may employ infrared (IR) techniques or near-field communication techniques and protocols, such as electromagnetic induction (EMI) techniques including passive or active radio-frequency ...