Higher harmonic generation in mesoscopic metal wires and loops interrupted by tunnel junctions is explored experimentally. When the sample is biased with a sinusoidal varying current, we observe giant higher harmonics in the conductance fluctuations and the Aharonov-Bohm oscillations. We demonstrate that the harmonic content is directly related to the probability for an electron to return to th...

This paper proposes novel robust speech F0 estimation using SRH (Summation Residual Harmonics) based on TV-CAR (Time-Varying Complex AR) analysis. We have already proposed robust F0 estimation based on the TV-CAR analysis in which weighted auto-correlation for complex residual signals is used as the criterion. In the SRH method, the criterion is calculated from LP residual signals. The criterio...

Miniaturized and tunable 3 dB hybrid and rat-race couplers using capacitively-loaded (C-loaded) transmission lines are designed. Couplers’ compactness has been achieved by substituting the conventional quarter wave transformers in both couplers by their equivalent C-loaded units. The tunable center frequency of the proposed couplers is realized by varying the transmission line loading capacitan...

Wind turbines with double output induction generators can operate at variable speed permitting conversion efficiency maximization over a wide range of wind velocities. This paper presents the performance analysis of a wind driven double output induction generator (DOIG) operating at varying shafts speed. A periodic transient state analysis of DOIG equipped with two converters is carried out usi...

Investigations of emission of harmonics from argon gas jet irradiated by 700 fs, 5 mJ pulses from a KrF laser are presented. Harmonics conversion was optimized by varying the experimental geometry and the nozzle size. For the collection of the harmonic radiation silicon and solar-blind diamond semiconductor detectors equipped with charge preamplifiers were applied. The possibility of using a si...

This paper is an extension of a previous work where a diagonally implicit harmonic balance method was developed and applied to simulate oscillatory motions of pitching airfoil and wing. A more detailed study on the accuracy, convergence, and the efficiency of the method is carried out in the current paperby varying the number of harmonics in the solution approximation. As the main advantage of ...

We present high resolution measurements of temperature dependence of low frequency ac magnetic susceptibility of superconducting Nb thin film in perpendicular time-varying periodic applied magnetic fields. We map this data, including harmonics, to the ac susceptibility calculated on basis of the complete analytical model of magnetization of thin superconducting disk in critical state. We find a...

In this paper, a single-channel speech enhancement system is presented that is capable of reducing (time-varying) harmonic noise. For this, the well-known Minimum Statistics approach is modified in order to track and suppress the harmonic noise based on the harmonics’ fundamental frequency which is assumed to be known a priori. The performance of the proposed noise suppression system is shown t...

Bright, circularly polarized, extreme ultraviolet (EUV) and soft x-ray high-harmonic beams can now be produced using counter-rotating circularly polarized driving laser fields. Although the resulting circularly polarized harmonics consist of relatively simple pairs of peaks in the spectral domain, in the time domain, the field is predicted to emerge as a complex series of rotating linearly pola...