A detection method is provided to detect the normal harmonics of the first harmonic of Earth's atmospheric electromagnetic resonance frequency of 15.3 Hz and abnormal frequencies of corresponding to neurological diseases. The method will assist and guide neurological specialists in providing a good ...
Using Si3N4 TriPleX waveguides23,24 as first demonstrated by the pioneering work of the group of K.J. Boller, has enabled hybrid integrated lasers with Hz-level Lorentzian linewidth, that have shown steady improvements1. Using weak confinement Si3N4 waveguides and laser self-injection locking it...
Frequency of the methane-stabilized He-Ne laser at 3.39 μm measured relative to the 10.17 μm R(32) transition of the CO 2 laser The frequency difference between the methane-stabilized 3.39 μm He-Ne laser and the third harmonic of the 10.17 μm R(32) transition of the CO 2 laser ...
The first harmonic of f0, a result of the stepwise frequency tuning of the swept laser source, is clearly observed at around 1 MHz. By applying a set of analog and digital band pass filters around the modulation frequency f0, both higher harmonics and noise are suppressed, while f0 ...
This contradicts any crucial involvement of the trunk in squeak sound production and implies a sound source along the oral vocal tract. Fig. 3 Spectrogram and acoustic camera images: a Squeak (2nd harmonic) orally emitted (f, 60 years). b Squeak (F0) orally emitted by other individual (f...
Distributed parameter characteristics of Ultra-long Distance Transmission Lines (UDTLs) are prone to cause harmonic amplification. Amplified harmonic components deteriorate the quality of energy delivery, and consequently affect the safety and operations of a power grid. This paper proposes a method based...
In this paper, Hes parameter-expanding method is applied to coupled anharmonic oscillators. The frequency-amplitude relationship and the first-order approximate solution of the oscillators are obtained respectively. The solution procedure shows that the method is very powerful and convenient to nonlinear...
where β is the modulation index (β = fd/fm) and Jn denotes the Bessel function of the first kind, of order n [6, p. 226]. In the frequency domain, this becomes an infinite series of delta functions; one of these (the carrier) is at the mean frequency fc, and the remainder (...
Previous studies demonstrate the possibility to jointly control the multiple harmonics using space-time-coding digital metasurface, but suffer from the drawback of inherent harmonic entanglement. To overcome the difficulties, we propose a multi-partition asynchronous space-time-coding digital metasurface (...
related to the peak and the valley of the first harmonic signal were observed when the LIA detection bandwidth was 0.417 Hz as previously, which implies that the QTF-transient response gradually dominates in the excitation of a quasi-pulsed acoustic signal of the QTF. But the first decaying...