For the first time cumulative distribution function and histogram of crossover frequency a contemporary operational amplifier ADA4898-2 is experimentally studied. Using USB lock–in amplifier, which allows automatic sweep current response non-inverting with significant static amplification, we measure 200 samples amplifiers. This new method gives advantage in accuracy speed study every amplifier...

A new member of the Cohen’s class time-frequency distribution is proposed. The kernel function is determined adaptively based on the signal of interest. The kernel preserves the chirp-like components while removing interference terms generated due to the quadratic characteristic of Wigner-Ville distribution. This approach is based on the chirplet as an underlying model of biomedical signals. We...

the fisher information matrix for a mixture of two pareto distributions is derived. numericaltabulations of the matrix are also provided for practical purposes. the work is motivated by a real-lifeexample.

a new derivation of the quantum boltzmann transport equation for the fermion system from the quantum time evolution equation for the wigner distribution function is presented. the method exhibits the origin of the time - irreversibility of the boltzmann equation. in the present work, the spin dependent and indistinguishibility of particles are also considered.

The Wigner distribution (WD) is perhaps the most prominent quadratic time–frequency signal representation. In this paper, which has mainly tutorial character but also contains some new results, we describe extensions of the WD concept to multidimensional vector signals, nonstationary random processes, linear time-varying systems (deterministic and random), linear signal spaces, and frames. We d...

background: alopecia areata (aa) is a noncicatricial (nonscarring) alopecia. the association between aa and celiac disease (cd) is debatable. several studies declare the relationship between aa and cd as measurement of celiac autoantibodies (anti‑gliadin iga and anti‑gliadin igg), but a few studies consider anti‑tissue transglutaminase iga. the aim of this study was to evaluate the frequency di...