In the article the mutual coupling between radiators influence on electrical parameters of convex antenna array with doubly curved radiators placement surface is investigated. Yagi-Uda antennas are used as radiators. The integral equations method is incorporated.  

A process based on the role approach for the synthesis of information security models of cloud computing systems based on applied system and threat models is described; the result is a security model, expressed, for example, in recommendations for improving information security or containing elements of the security configuration. The architecture of the system for analyzing models of information security of cloud computing systems is proposed. It includes a subsystem of analysis and modeling, a knowledge base and a subsystem of integration with external sources of knowledge. The system is model-oriented (detailed, high-level, applied, synthesized) and involves automatic processing of knowledge in the field of vulnerability management and software configuration. It is proposed an approach to solve the problem of constructing hierarchies of architectures models and threat models, realizing a combined analysis of functions and components.  

It's proposed a classification method based on the analysis of the feature subspaces properties. A procedure of automatic space identification where classes do not intersect is described. It's presented a possibility to use these spaces for automatic construction of classifiers.  

It is shown that the ideas about the electron motion into electric and magnetic crossed fields existing in the modern literature are incorrected. For relativistic velocity case the electron motion can't be imagined by the superposition of the drift with velocity u = E0/B0 and the rotation with frequency  = eB0/m (e, m is charge and mass of relativistic electron). In the relativistic case these motions are not separated, moreover the instantaneous rotation frequency  of relativistic electron is unstable for fixed coordinate system (E0, B0):  depends on m, which varies considerably during rotation.

Porous silicon layers were formed on a p-type silicon wafers by electrochemical anodisation. Dependencies of thickness and porosity of porous silicon layers as well as effective valence of silicon dissolution versus anodizing time and current density were obtained and analysed. A mathematical model for growth of layers of porous silicon was developed.  

The technique of subpixel processing of the position of the edge with increased resolution when the object is registered for lumen is proposed. Simulation modeling of the results of subpixel registration is carried out on the example of an ideal registration system. The limitations of the system operation in high and low light conditions are established, the conditions of stable operation of the system are formulated. The behavior of the system in the registration of translucent objects is studied, the value of the standard deviation σsub is estimated for the results of modeling the ideal registration system on the 8-bit CCD-line. The estimated calculations of the standard deviation σsub for the 12-bit CCD-line are carried out.  

It was developed the web application allowing to process large-volume images, affecting the minimum temporal characteristics. The flowcharts for implementing of the application logic are presented.  

The structure of the construction of the calibration measuring complex and calibration of the power meters in the millimeter wavelength range is given. The possibility of correcting one of the dominant components of the power measurement error, the mismatch error when using a vector network analyzer, is considered.  

The results of investigation of luminous intensity distribution and color quantities of LED lamps of different design are presented. It is demonstrated that measurement of angular luminous intensity distribution is more accurately indicates characteristics of LED lamp emission than measured luminous intensity value alongside its mechanical axis. It is established that color quantities of investigated LED lamps declared by manufacturer are different from values defined by applicable normative documents.

In this paper the term of «intelligent data analysis» is discussed, the cloud computing concept is described. The system developed and deployed on the computer cluster by ECM department of BSUIR is shown as an example of the intelligent data analysis by means of cloud computing. Some results of research with the help of this system are given.

An algorithm for solving the knapsack problem based on the proposed multi-criteria model is considered. The implementation of this algorithm allows to define the structure of the optimal subset as a union of certain elements of a Pareto layers group into which a initial data set is divided. The first such layer is the Pareto set. The optimal subset allows to find a specific subset of the initial data. Its elements as a result of belonging to the Pareto layers with large numbers cannot enter the optimal subset. The most expensive in terms of the number of operations required are knapsack problems, in which the number of elements in the set of initial data is quite large. The article shows that with a relatively small value of the knapsack volume, the number of elements required to find the optimal subset is significantly less than their total number in the original set. It can lead to a significant decrease in the total time to solve the combinatorial problem.  

The approach to detection and monitoring of Internet-facing technogenic objects has been described. The method of analysis of public services Shodan and Censys has been proposed. The automation monitoring software has been developed.  

The transmission model for optical diapason was developed for multilayer coatings consisting of alternating layers of copper and zirconium dioxide deposited on K8 glass substrates. The model is based on the laws of light interference. It was shown that the transmission in the optical range of a 60 nm thick Cu layer with a surface resistance ρ = 1 Ohm/sq is 4–5 %, and the transmission of the ZrO2/Cu/ZrO2/Cu/К8 coating obtained by dividing a 60 nm thick copper layer into two sublayers at 30 nm with the application of antireflection layers of ZrO2 on them, at ρ = 1.2 Ohm/sq it reaches 25 %. The thicknesses and the number of layers of the Cu-ZrO2 system were calculated, which ensure a transmission in the wavelength range of 400–700 nm of at least 45 %. The permissible thickness of Cu layers (≥ 20 nm) was determined, below which, due to their insular structure and partial oxidation with the formation of Cu2O, the electrical conductivity of the multilayer coating sharply decreases (ρ ≥ 100 Ohm/sq).  

Single crystals of solid solutions (MnIn2S4)1-х–(AgIn5S8)х have been grown with the Bridgeman method in the whole range of temperatures. The crystals structure and composition were determined. The study of the given single crystals in the temperature range 2–300 К and magnetic fields to 10 T was carried out. It is set that the given crystals are paramagnetic in the whole studied range. The specific magnetic moment increases with the temperature.  

The method to produce electromagnetic radiation shields using a non-woven needle-punched fabric containing carbon additives and foamed polyethylene coated with aluminum foil is proposed. To increase the reflection and absorption coefficients, it is proposed to create a cellular structure containing fragments of both types of materials with length from 20 to 40 mm and width from 5 to 8 mm. The measurement of the shielding characteristics was carried out on the automated meter of the transmission and reflection coefficient SNA 0.01–18 in the frequency range 0.7…17.0 GHz. It is shown that the values of the reflection coefficients in the frequency range 0.7…17.0 GHz were –0.5…–4.5 dB and the values of the transmission coefficient of electromagnetic radiation were –4.0…–25.0 dB.  

The paper presents the results of thermal studies for a sample of aluminum with nanoporous alumina using thermal imaging measurements. As a heating element, a carbon thread based on a viscose technical thread was used. On the base of results, it was established that local heating of the sample surface by the contact method using a linear heat source can be used in thermometry to determine the thermal conductivity of solid multicomponent dielectric materials.