The theoretical analysis of regularities in colmatation of highly dispersed particles from gas streams in porous fibrous materials influenced by electric field has been carried out in the paper. The paper reveals  that the use of an electric field can significantly increase colmatation efficiency of highly dispersed d_p < 0,5 µm sized particles and what is especially important that is colmatation efficiency of the most hard-to-capture d_p ≈  0,3 μm sized particles. Its highest values are achieved in the case of charged particle filtration through charged fibers. The colmatation efficiency is increased with higher particle and fiber charge, higher  packaging density and specific surface and decrease of filtration speed.

The paper describes how to obtain boride coatings on steel 20, 4X5MФС, X12M being treated in a boiling layer of metallothermic powder environment. Phase and chemical compositions, hardness and wear- resistance of boride coatings

The present paper investigates element composition,  regularities of structural and phase transformations in Si–Fe–Si and TiN–Ti–Si thin film systems in the process of impulse photon annealing depending on radiation energy density while applying such methods as transmission  electron microscopy, electron  diffraction analysis and energy dispersive x-ray microanalysis. Optimum characteristics of impulse photon annealing for formation FeSi₂ thin films of β-modification on silicon and TiSi₂ films in C54 modification have been determined in the paper.

A systematic analysis of factors that influence on the processes of  protective coating formation based on mixed matrices has been presented in the paper. The paper demonstrates a significant role of energy parameters of modifier drop-phase dispersed particles formed in the process of pneumatic spraying  and surface layer of a metal substrate on the mechanisms pertaining to formation of coating structure with optimal characteristics. Compositions of anticorrosive and tribological coatings for application in the designs of higher resource automotive components  have been proposed in the paper.

The paper presents recognition results of nanomaterial structure and sensory properties while using a developed optical «electronic eye» (e-eye) «ISON-4» and an intelligent self-learning system «ISNM» with the purpose of non-invasive fast prediction of structurе, properties and quality in respect of nanomaterial production  during their synthesis and high-precision control of micro-nanosensory device manufacturing process.

The paper proposes additionally to transmit bidimensional periodic circulation motion to a blanket occurring in the sawing plane surface with the purpose to intensify the sawing process of diamond mono-crystals with simultaneous quality improvement of sawed semi-finished products. An industrial sawing section modernization of the ШП-2-machine tool has been carried out in accordance with the above-mentioned approach. The purpose of the paper is an experimental determination of force value which is exerted on elastic washer by boom support screws in relation to conditions and excitation mode of a vibrating system of the modernized sawing section. The obtained data make it possible to determine optimal excitation parameters of forced vibrations.

The paper presents results of experimental investigations and points out the fact that conventional approaches to design and calculations of road pavements that presuppose application of porous asphalt concrete on compact bedding can cause some deformations and destructions initiated due to humidity migration in large internal material pores and lead to material destruction during warm season of the year when water is characterized by high activity. Such processes result in bitumen washing-out, white spot occurrence on the pavement and quick destruction of the pavement.

The paper proposes to reconsider existing approaches to design and calculation of road pavements, estimation of reliability and service-ability levels of the applied construction materials. In particular it is necessary to calculate a road pavement with respect to thermo-physical action while excluding condensate and humidity accumulation in porous materials.

The paper describes hydraulic tests of discharge capacity and pools conjunction pertaining to a dam spillway of round-crested weir at the Polotsk Hydroelectric Power Station. The process of ice passage through the spillway dam has been studied in the paper. The paper contains recommendations on safety depth downstream.

The paper reveals that while executing quantitative monitoring of technogenic earth surface deformations in geomechanical tasks geodetic and distance methods for measuring displacement of check points must be uniformly precise. Geometric leveling is recommended to execute on enclosed ground; traverse leveling is more rational to execute on open ground with the help of electronic tachymeter. Satellite leveling is characterized by high productivity and adequate accuracy and it is recommended for creation of reference high-altitude point network that ensures area monitoring with the help of an unified system of geodetic coordinates.

The paper presents investigation results pertaining to influence of such additive agent as used clay of oil production on concrete properties. Some examples are given to demonstrate usage of such concrete while manufacturing step plates. The paper shows that introduction of the given additive increases their waterproofing qualities and reduces water absorption.

Natural foundations of the buildings located in the middle Iraq region are represented by quaternary deposits that have been formed as residue of fine (clay and dusty) particles being transported by low-speed water flow. Density of clay soil is changeable within the following limits 1.38–1.47 g/cm³, and module of general deformation is equal to 1.6–1.9 МPа. In accordance with such characteristics foundation residues reach limit values at contact pressure of  80–100 kPa though design resistance
of soil is within the range of  180–250 kPа. In the case of significant soil load transfer it is necessary to consider variants of deep foundation. In this connection while executing engineering and geological research it is recommended to drill some exploration wells at the depth of 40–60 м.

 The paper considers the possibility of activation methods for asphalt mineral fillers while using the present process equipment at the asphalt plant.

The paper describes a methodology for calculation of concrete carbonization in respect of reinforced concrete structures used under conditions of the Republic of Belarus. The equation of concrete carbonization rate is presented in the probabilistic form. Such approach makes it possible to predict the service life as new structures at the design stage so the service life of the applied structures.

The paper investigates an influence of component quantity (lignin, cellulose and hemicellulose) on qualitative (physical and mechanical) indices of waste-paper in relation to its storage period and weather conditions. It has been established that while storing (in waste dumps) waste paper it is to be kept at a definite temperature and humidity in order to reduce impact of weather conditions.

Hydrous titanium dioxide has been obtained by hydrolysis of titanium tetrachloride in aqueous solution both with and without alcohol. Method of atomic force microscopy has been used in order to investigate morphology of air dried samples of  hydrous titanium dioxide. The paper shows  formation of conglomerates in case of hydrolysis without addition of isobutyl alcohol. According to turbidimetric data particle radius of hydrosol has varied in the suspension within the range of (135 ± 5) nm that is in good correlation with atomic force microscopy data.

The paper describes investigation pertaining to compоund fertilizer technology using circular-phosphoric-acid processing method of the Karatau basin phosphate raw materials. In accordance with the investigation results the optimal conditions required for obtaining monocalcium phosphate from low-grade phosphate by cyclic method have been determined in the paper. The obtained  ferzilizer meets all the requirements  prescribed to agricultural mineral fertilizers.

The paper proposes a theoretical methodology of all-round sampled population analysis. The methodology permits to evaluate unknown symptom scope of universe general population with high level of reliability and also evaluate a number of its units having a defined value of the symptom.

The method for asymptotic polynomials has been applied to an equation in wing theory which is described with the help of  a singular integro-differential equation. An approximate solution is based on the use of the Chebyshev polynomials of the second kind. Similar solutions were known previously for the spaces C and L₂. The paper presents an effective error estimates for the space C, allowing to calculate an error at any point in the reporting period and to determine an extent of the desired polynomial, which will approximate the exact solution in accordance with the given accuracy.

The paper presents a calculation of two-mass vibrating system, which has a resilient element in an energy  storage device. Graphical results of calculations in the form of sampling analogue-frequency characteristics are given in the paper.

The calculation technique for economic efficiency of implementation of innovative TPP automatic control systems has been developed in the paper. The technique allows to prioritize implementation process of the proposed technical solutions, especially the implementation of those solutions that provide high economic effect and calculate the economic efficiency of the introduction of a concrete innovation project.