A calculation method that allows assessing the impact of external cooling and circulation intensity of melt in the liquid core of the workpiece formation of outer crust of fine disoriented crystals is presented. One can also obtain the time when the plane front will lose stability and growth of columnar dendrites begins. When solving the inverse problem it is possible to set the parameters of an existing layer of slag-forming mixture on top of the mold.

The results of kinetics research of Sn–Bi coatings deposition under different plating conditions (plating pulse and ultrasonic, stirring with a magnetic agitator), were demonstrated. It has been shown influence of frequency, pulse period-to-pulse duration ratio, ultrasonic strength, stirring on limiting diffusion current, range of cathodic potential.

Geometry and phase composition of copper nanotubes obtained by template synthesis were studied using scanning electron microscopy, energy dispersive and structural X-ray analysis. Based on the results of studies of interaction of fast heavy ions with Cu-nanotubes, the influence of ionized radiation on the change in crystal lattice, crystallite size and phase composition was shown.

 Properties of WC–6Co hard alloy powders obtained by the method of spark plasma dispersion (SPD) are presemed. Powders of WC–6Co hard alloy were produced using spark erosion in distilled water. The properties of powders, such as specific surface area, morphology, structure and size distribution, were studied. Investigation of the powder properties was made using the methods of scanning electron microscopy, X-ray phase analysis and disk centrifugal sedimentation particle size analysis. The principal possibility of SPD method to produce highly active additives, suitable to use during creation of tools and hardening of wear-resistant coatings from hard alloy waste is shown. 

The results of studies of effect of structural state of chromium in the composite SHS-powder FeAl(Cr)/Al₂O₃ on its resistance to oxidation are presented. To study the possibility of alloying of mono-aluminide iron with chromium, the synthesis reaction mixture containing a source of chromium as chromium oxide powders or alloy PХ-30 were used. Powders were prepared by self-propagating mechanoactivated high-temperature synthesis (MASHS). Cyclic oxidation tests were conducted at a temperature of 700–1000°C in an air atmosphere for 2 hours. In the case of alloying the intermetallic alloy PX-30, the resultant powder exhibits a greater weight gain in contrast to powders prepared from a reaction mixture comprising a chromium oxide in which chromium is not only alloyed aluminide but is present in a free state.

An optimization of magnetic-abrasive finishing process for radial cylindrical surfaces has been performed. The optimization relies on stochastic models derived from statistical analysis of experimental data obtained by applying experimental design techniques. Dependencies of surface roughness and specific material removal rate from technological modes described by regression models in the form of 3rd-degree polynomial functions have been studied. Complex relationships and interdependencies between technological modes of magnetic-abrasive finishing process for radial cylindrical surfaces of ball-bearing races have been discovered and explained. As the result of the multi-criteria optimization, such parameters of technological modes have been identified, that ensure greater specific material removal rate within the targeted surface roughness tolerances.

It is determined that linearization of displacement equation of a bent beam makes a significant relative error in the definition of displacements for flat metal and leaf springs. It is found that modeling of behavior of flat springs and beams using the ANSYS ED 10 must be carried out with the use of BEAM188 and SHELL18 1elements and with the enabled LargeDisplacementStatic option. It is because of non-linearized equation used for determination of displacements that corresponds to large deflections and displacements of elastic line.

With rapid development of automotive industry, the demand of automobile semi-axis is increasing. However, it increases the cost investing in dies as automobile semi-axis are stile produced with single-wedge cross-wedge rolling. Therefore, the study on deformation of MCWR forming automobile semi-axis is of great significance. The software PRO/E is adopted in setting up three-dimensional model, with the advanced explicit dynamic finite element DEFORM, the simulation of rolling automobile semi-axis with MCWR was analyzed systematically. The influence of rolling parameters on rolling force were attained by a practical computed method. It was shown that side wedge forming angles and side wedge transition angles had little influence on the force, the coefficient friction had critical influence on force.

On the basis of systems of identical equalities formed by 2n-multiple integrals of the desired temperature function and integral boundary characteristics, analytical solutions of the boundary problem on the nonstationary heat conduction of an extended plate with the first-kind boundary conditions have been obtained. The method proposed surpasses the known integral methods in accuracy and convergence of solutions by several orders of magnitude.

The results of experimental studies of kinetics of the reaction CaO + CO₂ = CaСО₂ performed at isothermal conditions at temperatures of 773, 873, 973 and 1123 K are being discussed. Pyrolysis gas, containing approximately 14.5% vol. of CO₂ was fed during the experiments into the reaction zone, which housed the sample of calcinated dolomite. The extent of the reaction was determined from the weight gain of the sample kept at a constant temperature. Analysis of the data has shown that the kinetics of the CaO carbonation reaction is characterized by typical periods of heterogeneous processes, such as periods of induction, reaction acceleration and deceleration. The rate-determining step of the overall process for small degrees of conversion is a chemical reaction of CaO and CO₂ . Activation energy and pre-exponential factor of the Arrhenius equation were estimated for this stage on the basis of the performed study. They are 29.6 kJ / mol and 0.36·10^–1 min^-1 (6.0·10^–3 s^-1 ) respectively.

Conditions of self-similarity of heat removal relative to the reactor power for bulk active zones have been determined. In this case the thermal stresses of structural elements at partial loads remain unchanged. The power intensity of 10 MW/dm³ and neutron fluxes over 5⋅1016 neutron/(cm^2.s) can be achieved in such active zones. This opens a way for creation of compact and mobile nuclear devices of different using.

Results of numerical modeling of non-isothermal moisture transfer in porous absorber of electromagnetic energy in view of the phenomena of heat and moisture are presented. An analysis of the moisture content of fields, steam pressure and temperature for different times shows a significant distribution of moisture in non-isothermal conditions, which must be considered when masking object.

A method for computer-aided diagnosis of skin lesions based on image retrieval scheme is proposed. The suggested method is rather simple, reliable and robust. The results of the tests carried out on a publically available image dataset suggest that the performance of the method proposed is comparable with one of a rather complicated conventional method of melanoma diagnosis. The best performance is achieved when combining both methods together.

A multiobjective optimization problem of a condensing unit frame is considered. Abstract of multiobjective optimization methods and algorithms is given. The article provides an example of genetic algorithm usage for seeking optimal parameters of the unit frame.

The modeling of formation of topological structures with 3D elements of various sizes and configurations in а vacuum resist exposed to pulsed laser radiation with different energy density was carried out. It was found experimentally that the simulation allows predicting the actual parameters of lithography laser systems for high-quality formation of 3D topology elements in layers of vacuum resist when creating masks.

One of the major technical problems of industry of the Republic of Belarus is the measurement of mass and volume flow rate, as the basis for technological consideration in energy-saving and resource-saving technologies. To solve this task many measuring instruments subject to metrological control are developed. This article provides an analysis of the main types of means of discharge measurements, which are used at the industrial enterprises of the Republic of Belarus, the modern requirements for flow meters, as well as assessment of the metrological reliability in time for some types of flowmeters.

Agency of viscosity of an aqueous solution of chloride of the sodium inducted into expanded clay, on its values of coefficients of reflexion and transfer over the range frequencies of 0,9–17 GHz is determined. Optimum values of concentrations of an aqueous solution are spotted. Use of the gained effects of examination is offered by working out of constructions of shields of an electromagnetic radiation for making shielding premises.

For increase of reliability of radar objects classification it is offered to use sequential Bayesian recognition algorithm, providing minimisation risk of accepted decisions on an object class and further supervision continuation. For sequential specification of data it is proposed to use a posteriori probability of solving statistics of the previous step of classification as a priori information for the following step.