Over frames of short time duration, filtered speech may be described as a finite linear combination of sinusoidal components. In the case of a frame of voiced speech the frequencies are considered to be harmonics of a fundamental frequency. It can be assumed further that the speech samples are observed in additive white noise of zero mean, resulting in a standard signal-plus-noise model. This m...

The concept of phasor measurement and its application in power system monitoring and control are introduced in this paper. The example of application of PMU in a Campus Wide Area Monitoring System (WAMS) is then elaborated. With the availability of synchrophasor data measurement, it makes possible to establish the power system monitoring by directly employing spectral analysis of power or phase...

Recently the reconstruction of sparse trigonometric polynomials has attained much attention. There exist recovery methods based on random sampling related to compressed sensing (see e.g. [17, 10, 5, 4] and the references therein) and methods based on deterministic sampling related to Prony–like methods (see e.g. [15] and the references therein). Both methods are already generalized to other pol...

Nanodielectrics, typically defi ned as polymer composites with nanosized ceramic fi llers, have demonstrated significant improvements in electrical endurance, breakdown strength and dielectric constant relative to their constituent materials, which leads to enhanced energy storage capabilities. The key role played by the large interfacial area surrounding nanofi llers proves to be essential to ...

Recently, we obtained the simple metrics of a spherically symmetric black hole in dark matter halo, and extended to case rotation. As characteristic sound holes, quasinormal modes (QNMs) are one important means understand holes currently. Based on these two hole, study QNMs cold (CDM) scalar field (SFDM) models using methods material perturbations gravitational perturbation, make comparisons wi...

The "Sompi" method of Hori et al. [1989] (henceforth H89) is an autoregressive (AR) method for finding the exponentially decaying/growing sinusoidal components (henceforth simply "sinusolds") in a time series corrupted by noise. H89 made numerous references to an earlier study by Chao and Gilbert [1980] (henceforth CG80), which has described a similar spectral analysis method genetically (and p...

The interline power flow controller (IPFC) can control the active and reactive of different lines in system. To utilize flexible ability IPFC increase damping characteristic its AC system, this paper proposes a low-frequency oscillation (LFO) suppress method through IPFC. LFO is designed by adding supplementary signals to outer current loop In addition signals, are also added related loop, whic...