Vol 19, No 4 (2016)

We compare three methods of calculating the dispersion characteristics of open dielectric waveguides. We consider the spectral method, implying the expansion of the autonomous components of the field. Numerical results obtained by this method are compared with the results given by the method of partial areas, which when applied to the analysis of the open circular dielectric waveguides allows you to find the exact solution. The question of the correctness of the application of the ray method for calculation of the strip of dielectric waveguides.

The main ideas and strategic directions in synthesis of fundamentally new topological radar detectors of low-contrast objects have been considered. The objects detection is conducted against the background of reflections from the ground, sea and precipitations. The new topologic signs and methods of detection of low-contrast objects against the background of high-intensity noise are presented. The methods are based on the textural and fractal analysis and also on the theory of deterministic chaos. The main purpose of this work is to interpret the main directions of radio physics, radio engineering and radio location in «fractal» language that makes new ways and generalizations on future promising radio systems. The new kind and approach of up-to-date radiolocation: fractal-scaling or scale-invariant radiolocation has been proposed.

New discrete mappings of Thomson type self-oscillatory systems with the delayed feedback are offered. Mappings are received by method of structural synthesis with use of the sequences of discrete counting of pulse characteristics of the resonators which are a part of self-oscillatory systems. The method of the slow-changing amplitudes is used for the analysis of response characteristics of self-oscillations in the discrete time. The example of generation of self-oscillations with discrete mapping of the oscillator of Van der Pol with delay is given.

This article discusses the development ravnokontrastnogo color space. This new color space ellipses known (for a two-dimensional space) or ellipsoids in three-dimensional space are transformed into a circle or regular spheres (balls), respectively. It is important to have ravnokontrastnuyu color system, in which the geometric difference of color differences would not depend on the compared colors (color) on the color chart.