The precise method of measurement of ultrahigh own Q-factors of the superconducting cavity, based on excitation of oscillations in the cavity by an electronic beam is offered. At such measurement the resonator is not coupled to any external microwave chains, its own Q-factor is determined on a power loss of an electronic beam which can be measured with a high accuracy.

Characteristic properties of the formation of physical - chemical properties of a manganite with the composition La_0.6Sr_0.4MnO_3-d were considered. It was determined that two titration current minima depending on the heating rate and the partial pressure of oxygen (pO₂) exist at different temperatures, heating rates and partial pressures of oxygen. It is supposed that extreme values of the titration current are caused by breaking of bands of anions existing in two different forms with the tetravalent manganese, as well as by the excessive superstoichiometric oxygen which partially compensate the presence of Mn⁴⁺ cations, and by oxygen recovering the electroneutrality of the system appearing due to a decrease of the charge value due to the introduction of Sr²⁺. It was established that the activation energy of oxygen diffusion is decreasing and reached the minimal value 241 kJ/mole at pO₂=5 Pa, with a subsequent increase up to ~273 kJ/mole at pO₂= 150 Pa and d=0,004, with the increase of oxygen defects concentration in the La_0.6Sr_0.4MnO_3-d anion sublattice. Concentration dependence of the activation energy of oxygen diffusion is motivated by a formation of the stressed layer, placed near the surface of grains which are depleted with oxygen and at the same time they are a buffer for the oxygen diffusion.

The analysis of the terrestrial electromagnetic filling in severe radio-electronic environment specified by heterogeneity of the composition of stationary and mobile radio-electronic devices (RED), specified by presence of RED with a directivity and randomness of electromagnetic radiation power, and also by heterogeneity of power criteria of electromagnetic safety for RED of various kinds is made. The equations defining the relationship of terrestrial electromagnetic filling in such radio-electronic environment with total intensity of an electromagnetic background, created by stationary and mobile RED at a terrestrial surface, and also with probability of excess of maximum permissible level by the sum of total intensity of electromagnetic field from stationary and mobile RED, and of intensity of an external electromagnetic background, are received.

Methods are described for experimental studies of the spectral parameters of the reflected radiation from the surface of various materials. The methods of data processing are presented. The results of the determination of the spectral radiance factor of the reflected light materials for different viewing angles are shown.

The consideration is made of the ways leading to increasing the control of residual stresses in structures such as silicon dioxide-monocrystal silicon substrate. The results concerning the determination of the level of residual stresses in structures Si-SiO₂ are presented.

Thus, Al-Al₂O₃ structures characteristic features of which are the considerable height (300 - 450 μm ) of contact pads and conducting lines, the high thickness (150 - 600 μm ) of insulating anodic alumina with high breakdown voltages between the contact pads (up to 8 kV) were made in the present work. Such structures may be used in power electromechanical systems. Methods of the high-speed anodization, of the deep anodization and chemical etching were investigated to provide practically vertical walls in the Al-Al₂O₃ system.

The shielding effectiveness of flexible radioabsrobing materials on the basis of textile matrixes impregnated with aqueous solutions of chloride, sulfate solutions and their combinations in the frequency bands of 8…12 and 27…37 GHz is investigated.

Features of adaptive extended Kalman filter implementations are considered. Recommendations about practical application of adaptive extended Kalman filter modifications are listed.

The Cauchy problem for differential equations with Caputo fractional derivatives is given. New methods for studying the regions of existence of solutions of these equations are presented. Analysis of changes in these areas was done by changing the settings right and left sides of the equation.

The complexity of the norm decoding is exanimated. The results of computational experiments in the norm decoding for BCH codes are presented. Analysis of the results shows that part of the norm instead the whole norm of the syndrome can be used for the identification of multiple errors patterns. Properties of norms of syndrome for BCH codes are identified. Identification based on the combined use of main and supplementary norms if the value of the first component of the syndrome is zero are proposed.

The nonlinear error control code on the basis of cryptographic transformation of data through Rijndael algorithm is considered. Correction properties and fast decoding algorithms of a Rijndael-code are compare.

An analysis of nonlinear distortion in passive optical networks (PON), due to stimulated Mandel'shtam - Brillouin scattering is performed. It is shown that starting with a pump power of the signal / noise ratio at the input of the receiver opposite direction decreases sharply, which leads to increased likelihood of errors.

The calculation methods of the orientation angles of the transmitter and the noise receiver antennas, and also calculation of the true incremental angle are explained, dependence of an computation error of the incremental angle values is received, when using the approximate calculation formula .

In the given work the algorithm of calculation of co-ordinates of elements of MIMO radar antenna is presented. Initial data for algorithm are the number of transmitting, receiving elements, and also demanded number of channels of receiving.

Abstract The process of muzzle shot wave formation is considered taking into account features of small arms. Temporal and spectral structures of output signal of acoustic receiver that implements shot wave reception in a far field zone is determined.