The front of electromagnetic wave generated by coherent sources of radiation from two points of space is analyzed in the article. General expressions are obtained that allow to estimate the directions of the arrival of the wave at a point in the space where the observer is situated (the angle-system), depending on the parameters of the radiators system. It is shown that the obtained relations for some particular cases coincide with the expressions presented in known publications on the subject under consideration.

The model of client-server interaction with local and remote non-resident servers is developed, which allows to bind the server lifetime on the client lifetime. The proposed model is applied to the extensible programming of Microsoft Office applications, which allows to solve such issues like organization of cross-module interaction, elimination of code and data duplication in each module and export of common functionality for all modules.

This article describes the system for collecting, analyzing and visualizing of technical information about devices connected to the Internet based on the Censys platform. It was developed using Python programming language and it's intended for primary data analysis. The system can be used by security administrators to prevent potential threats in automated systems. This project was tested on the example of information about devices serving the most popular Internet resources in Belarus.

The estimates of the total electromagnetic background intensity created by mobile and base stations of GSM cellular communication networks in urban area in places of subscribers gathering on business hours are made by computer modeling of cellular radionetwork fragment with use of three-dimensional multibeam model of radiowave propagation (X3D model) and three-dimensional model of typical urban area fragment (by example of Minsk) at different base station antenna height and various spatial density of active mobile stations.

The article introduces method of vibration signals representation based on phase trajectories. The method is proposed as a supplement for current methods in expert systems of vibration analysis to solve tasks of prior uncertainty. Preliminary feasibility analysis of the method was carried out by visual comparison using large data selection.

Authors describe a new software and computer complex designed and developed for the processing of the data of the whole genomes of mycobacterium tuberculosis with the purpose of obtaining information about the profile of tuberculosis resistance and virulence.

Influence of pulse and reverse current on the composition, physical-mechanical and functional properties of Ag-W coatings was studed. It's established that adding tungsten oxides to composition of silver coating, depositing with pulse and reverse currents allow to reduce a grit size, to increase microhardness and wear resistance. Depositing of coatings with periodic currents increases a process efficiency and expands a technological capabilities of the electrophysical properties control of the electroplated composite coatings.

The approach to analysis of speech signal in order to amyotrophic lateral sclerosis diagnosis is proposed. As a features of pathological changes in the voice the results of a format analysis of vowel /aa/ and /iy/, the distance between the envelopes of these vowel, and information about pauses between words in the test speech signal were used. To perform the classification, the linear discriminant analysis was used.

The unaveraged mathematical model is formulated on the large-particle method basis for researching a free-electron laser with a longitudinal electrostatic periodic undulator. The parameter optimization is realized and the characteristics of the interaction processes in optimal regimes are studied.

A method for estimating and accounting for the statistical distributions of angels for the spatial orientation of an aircraft in the interest of adapting radar systems to changing observation conditions is considered. The influence of the object observation condition on the distribution parameters of the angles of its orientation is analyzed by the method of mathematical modeling. Estimates of the analyzed distribution laws were formed by two methods: the method of statistical test and the Monte-Carlo method. The advantages and disadvantages of each method are considered. The obtained estimates of current distributions of object orientation angles allow adapting radar portraits to changing observation conditions.

The study results of parameters of main high-frequency range mobile antennas are presented: whip antenna, sloping wire antenna, inverted V symmetrical vibrator (dipole), T-shaped antenna, sloping V antenna, NVIS, traveling wave antenna, λ-shaped antenna. The analysis of the input active and reactive resistances of the antennas, as well as standing wave ratio is performed depending on the frequency. The corresponding graphical dependencies are presented.

The results of a numerical study of the envelopes of radio pulses scattered from а сruise missile are given. The spectral method and the method of moments are used.