In this study, cardiac current source localization was simulated using the spatial filter method. We estimated sources data from two measurement surfaces, i.e., front and back of subject, to reduce large extension in depth direction. Three methods for creating filters were developed exact low-resolution brain electromagnetic tomography method based on different creation procedures. The first is...

Periodic noises are unwished and spurious signals that create repetitive pattern on images and decreased the visual quality. Firstly, this paper investigates various methods for reducing the effects of the periodic noise in digital images. Then an adaptive optimum notch filter is proposed. In the proposed method, the regions of noise frequencies are determined by analyzing the spectral of noisy...

in the current seismic data acquisition techniques, sources are fired with large time intervals in order to avoid interferences between the responses of successively firing sources, measured by the receivers. this leads to a time-consuming and expensive survey. theoretically the waiting time between two successively firing sources has to be infinite, since the wavefield never vanishes completel...

Background. A further increase in the speed of information transfer is determined by more stringent requirements for elements communication devices. One most important components such devices various filters, which are often made on basis dielectric resonators. Calculation parameters multi-section filters impossible without development theory their design. The filter based electrodynamic modell...

We show that the reduced-rank output signal computed via truncated (Q)SVD is identical to that from an array of parallelly connected analysis-synthesis finite impulse response (FIR) filter pairs. The filter coefficients are determined by the (Q)SVD, and the filters provide an explicit description of the reduced-rank noise reduction algorithm in the frequency domain.

the problem of downward continuation of the gravity field from the earth’s surface to the reference ellipsoid arises from the fact that the solution to the boundary value problem for geoid determination without applying stokes formula is sought in terms of the disturbing potential on the ellipsoid but the disturbing gravity observations are only available on the earth’s surface. downward contin...

This paper presents an efficient feature extraction method based on discrete wavelet transform for the classification of the power quality disturbances. Firstly, the decomposition coefficients are obtained by applying 10-level wavelet multi resolution analysis to the signals (normal, sag, swell, outage, harmonic, sag with harmonic and swell with harmonic) generated by using the parametric equat...