Sharpan O.B.

Bioimpedancometry variants in studies of human age physiology

This study describes the possibilities and specificity of adequate use of various impedancometry methodologies. The experimental results obtained by two independent methods indicate that bioimpedancometry may be an effective tool for studying involutive processes of human age physiology. Furthermore, bioimpedancometry is also effective when one-frequency and two-frequency methods are used, especially for estimating the secondary index of full impedance of human body – polarization index and phase shearing angle.

The increase of the precision of the orthogonal transformations for the analysis of the linear systems

The study proposes the analysis of application of the nonminimum derivation formulas, using the method of the orthogonal transformation. We determine that it leads to the increase of precision of the chosen method, comparing with the application of the formula of the difference quotient.

Normal discrete transformation with the real core of the arbitrary shape signal

In this article, the method of formation of the discrete orthogonal transformation, named normal, is proposed. The transformation spectrum has only one nonzero transformation for the arbitrary shape test signal.