The influence of modifying annealing and technological modes of sintering under pressure on the structure and phase composition of polycrystalline superhard materials on the basis of nanodiamonds and diamond blend of detonation synthesis was studied. It is shown that the atmosphere in which the annealing is occurred affects the content of the diamond phase and the crystallite size of nanodiamonds after sintering under pressure. As a result of the modification of anodiamonds by silicon in combination with vacuum annealing the composite nanopowder diamond- SiC was synthesized, which provides a basis for sintering of diamond nanostructured compacts of increased diameter.

Using the SiO2 porous templates on silicon substrate, Si/SiO2(Cu) nanostructures have been synthesized by electrochemical method. A comprehensive study by means of scanning electron, transmission electron, atomic force microscopy and diffraction analysis techniques have been conducted. The morphological features and the lateral dimensions of metal nanostructures, deposited in the pores, have been defined. A tendency to form copper agglomerates with dendritic shape have been shown. This structures are promising for using as catalyst or substrates for SERS.

Single-phase nanosized Sr2FeMoO6-d powders were synthesized by the citrate-gel-method at pH = 4, 6, 9, with various degrees of superstructural ordering of Fe3+ and Mo5+ (P = 65% for pH = 4, P = 51% for pH = 6 and P = 20 % for pH = 9). Grain size of the powders are in the range of 200–600 nm. With that, the largest number of grains having a size of 550 nm was characteristic for powders with pH = 9 and 230 nm for pH = 4. It was established that the value of P decreases with increasing pH, which indicates an increase in the number of –Fe2+-О2--Fe2+- clusters with antiparallel distribution of iron spins which leads to a decrease in the total magnetic moment and the Curie temperature. In powders with pH = 4 the number of low dimensional grain is significantly larger than in powders with pH = 6 and 9, which led to their large magnetization value at T = 4,2- 19 K.

A method of impedance control and diagnostics of quality of insulating materials, used in electrotechnical industry, is proposed. Electric-capacitive transmitters are created. Formulas to make monitoring and diagnostics of dielectric parameters of insulating materials, such as relative permittivity, dielectric loss tangent, and relevant standards are developed.

A version of forming elements for rollers of rolling presses in the form of circumferential slots with a concave profile, forming arched lugs is proposed. On the basis of comparative analysis the authors have proved a rational method of their processing when slots are profiled by the method of copying and they are formed lengthwise by the method of contact. The regularities of speed variations of the instrument and workpiece movements, providing stabilization of cutting conditions when arch lugs processing by special end-milling cutter are established.

Verification methods of computer models of mechanical structures were developed on the basis of processing of the results of experimental data. Two approaches to construction of mathematical models were considered: the method of «black box» and the analytical method based on differential equations. All theoretical points were demonstrated on the example of long-stroke suspension elements verification.

The results of research of the processes of electrolytic-plasma polishing using analysis of 3–6% of the electrolyte aqueous solution of ammonium sulfate (NH4)2SO4 and the solid residue in the EPO of stainless steels AISI 321 and AISI 316L are presented. Based on research and experience, a model analyzes the origin, development of vapor-gas shell in time, formation of a solid precipitate and changing of the chemical composition of the electrolyte. The results of studies of the chemical composition of the electrolyte and sludge confirm the physicochemical nature of material removal at electrolytic-plasma polishing.

A description of motion of foam in hose line of compressed air foam system by finite volume method is presented. Computational domain and formulated boundary conditions of numerical simulation is determined. We assessed the Reynolds number for the flow and selected a turbulence model. The flow characteristics of the gas-liquid mixture in each cross section of the channel are determined and analyzed. Expression to calculate the pressure loss, as well as changes of values of density and velocity of the gas-liquid mixture along the channel is determined.

Results of numerical analysis of accuracy and convergence of solutions on the basis of the integral method of boundary characteristics are presented. It is shown by the example of consideration of a semi-bounded space with the first-kind boundary conditions that the solutions constructed are exact in essence because their error for parameters changing within a wide range comprises hundredth–ten-thousandth fractions of a percent.

An approximate method is suggested for calculating heat and mass transfer in cylindrical porous bodies with deepening of the evaporation boundary with account of the variability of vapor temperature and pressure on it. Dependences of evaporation boundary deepening and kinetics of drying on the parameters of porous medium and external thermal effect have been found.

Heat removal in nuclear reactors with micro fuel has been analyzed. The area of heat transfer fluid sustainable filtration in the fuel bed has been defined. It appears that heat removal stability does not depend on the size of the core power density. It is influenced by the ratio of thermodynamic parameters of coolant inlet and outlet of the fuel bed and by the level of flow turbulence. It shows that the bulk fuel assembly harmoniously combines all the advantages of micro fuel and the side inlet of coolant in the bed.

Single-dimensional models of contaminants migration in soil do not always adequately reflect the processes that occur in real life. Transition to two- or three- dimensional modeling would help enormously improving accuracy of calculations.

A review of references on application of the atomic force microscopy for biological subjects’ investigation is submitted. Advantages of this method in comparison with other types of microscopy are shown. Achievements in this area and the problems arising during the work with biological cells are described.

Considerable efforts have been made to develop non-destructive methods for testing internal stress/strain condition of polymer composite materials. A new method of monitoring internal stresses is presented. The method can be referred to as embedded sensing technique, where the sensing element is a glass-coated ferromagnetic microwire with a specific magnetic anisotropy. With a diameter 10–100 microns, the microwire does not affect the structural integrity. When the microwire is remagnetized the sharp voltage is induced which is characterized by high frequency harmonics. The amplitude of these harmonics sensitively depends on various stresses. The experimental results are analyzed using simple magnetostatic models.

The results of Monte Carlo simulations of measurement of uniformly in-depth contaminated with Cs nuclides soil using scintillation detector in situ measuring geometry have been discussed. The dependence of detector response functions on contamination depth is studied for nuclides 134Cs and 137Cs. Using the in situ methodology has shown the possibility of determining the depth of Cs nuclides distribution in soil without a preliminary sampling and analysis.

An approach to automatic categorization of text documents and summaries is proposed. This approach is based on the use of thematic text corpora. The developed algorithms can be used to categorize unstructured texts on different input languages. A rubricator for each language must be built «by hand», where each item of which is associated with the search image relevant to her corpus.

With the usage of fundamental and special methods of research the characteristics of brown coal ashes, asphalt concrete mixtures, asphalt concrete samples which contain these ashes have been explored. The results of the research showed the ability of use of Zhitkovichi brown coal deposit and Turov ash deposit for building materials production. The novelty of the research is to develop formulations of asphalt concrete mixtures, methods for their preparation with the use of brown coal ash and oil shale ash.