One of the most massive polymer waste of consumption is car tires that are going out of service. The disposal of such tires at a solid waste landfill is an extremely inefficient way of their disposal, entailing an increase in the area of landfills and an increase in negative environmental impact. The least financially and labor-intensive way of processing automobile tires is grinding into fractional crumbs. To reduce the costs of sorting and further grinding of tires, a shredder with a dispersion of 3 mm is used. The article suggests the use of rubber crumbs as a binder when laying highways. Studies of indicators affecting the operational parameters of asphalt pavement at different values of the mass of rubber crumbs in comparison with a clean sample were carried out and the optimal specific mass of the added crumbs was determined, which was 15-20%.

Keywords: rubber crumb, tires, asphalt mix, optimal weight

The article discusses the selection and evaluation of energy-saving technologies for metallurgical production. Alternative energy sources are ordinary natural phenomena, inexhaustible resources that are produced naturally. Such energy is also called regenerative or "green". The article assessed the climatic characteristics, landscape, level of development of the territory of the location of the research object, analyzed the possibility of using solar and wind energy, hydropower, waste energy, low-potential energy using secondary energy resources. An engineering system based on the use of regenerative heat exchangers or economizers was proposed, which converts the heat of the exhaust gases from the electric steelmaking production into energy used for heating or hot water supply.

Keywords: metallurgical industry, electric steelmaking, alternative energy, energy saving, engineering systems, low-potential energy, secondary energy resources, heat of exhaust gases, regenerative heat exchangers, economizers

The paper considers the problem of bringing vibrations of a flat membrane to rest, controlled by forces applied to the entire area of the membrane and limited in absolute value. Sufficient conditions are given for the initial data of the deviation and velocity of the membrane, under which a complete stop of motion in a finite time is possible. The resting time is also evaluated. The theorem on estimating the eigenfunctions of the Dirichlet problem for the Laplace equation used in the work makes it possible to refine the mentioned sufficient condition in comparison with the work of F.L. Chernousko. In this work, a similar problem is considered, and the method of expanding the unknown control and the corresponding solution in terms of eigenfunctions of the Dirichlet problem for the Laplace equation is also applied. In this paper, the problem of bringing various elastic oscillatory systems with distributed parameters (membrane, rod, plate, etc.) to a state of rest in a finite time is reduced by means of expansion into a Fourier series in the corresponding system of eigenfunctions to the study of the problem of stopping a counting system of pendulums, connected with each other only through the values of external control actions, the sum of the values of which should not exceed in absolute value some given constant. In order to fulfill this limitation, it is necessary to use estimates for the absolute values of the eigenfunctions, normalized in the mean square. In this paper, we use some estimates for the absolute values of eigenfunctions, previously obtained by Eidus D.M. This allows us to refine the results of F.L. Chernousko for sufficient conditions on the initial functions of the oscillatory system, under which we must dampen the oscillations. These conditions consist in the fact that the initial functions belong to Sobolev spaces with certain indices and in the fulfillment of some additional boundary conditions on the boundary of the domain in which the system is defined.

Keywords: control, wave equation, limited distributed force, Fourier method, counting system of harmonic oscillators

The article considers a model for identifying the parameters of an electric motor by the free run-out method by creating a model of acceleration and deceleration processes in the Scilab Xcos environment. The model is based on a simplified model of an electric motor in the form of an aperiodic link of the first order, which is supplemented by a model of a mechanical link connected to the shaft of an electric motor. Taking into account the inertia of electromagnetic processes makes it possible to adequately model the state and parameters of the electric motor. Identification allows you to determine the moment of inertia of the mechanical part of the electric motor. The model is based on a system of differential equations describing the dynamics of the processes of acceleration and braking of an electric motor. The scheme of the model includes blocks for solving a system of differential equations and blocks for calculating an identifiable parameter. Simulation modeling was carried out in the Scilab Xcos environment to evaluate the functionality of the resulting model scheme. The values of the desired moment of inertia are calculated from the beginning to the end of the simulation process, and the correct value is obtained, with the exception of a short section at the beginning of acceleration. The obtained graphical dependences allow us to visually illustrate the process of acceleration and deceleration of an electric motor in the form of transient functions for torques.

Keywords: electric motor, moment of inertia, electromagnetic moment, run-out method, parameter identification, torque, model diagram, transient function

Many sources of environmental pollution affect human health. The concentration of harmful substances constantly changes during the day when the weather conditions change in different parts of the territory. Residents can repeatedly enter and leave areas of increased pollution without noticing it with their senses when moving around the city. The authors analyzed the existing solutions for monitoring the quality of atmospheric air, as well as key sources of pollution and their distribution in the air. The interrelation of distribution of pollutants with weather conditions is noted. Preparation of data on the presence of harmful substances on the example of the city of Volgograd has been carried out. A method for organizing monitoring of harmful substances in the atmosphere using a software and hardware complex is proposed. The developed method was applied to create a specialized web application. The implemented solution allows to monitor the state of the environment using sensors and build routes around areas with a high concentration of harmful substances.

Keywords: environment, air quality, air pollution, ecology, monitoring, web application, eco-route, spatial data, route building, cartographic visualization

The radiation-temperature dependence for fresh water in the temperature range of 30-50 degrees Celsius is experimentally investigated. It is established that the radiation temperature of the water surface on the waves of the millimeter range is determined exclusively by the effective temperature of the skin layer.

Keywords: radiation temperature, skin layer, water, emissivity,radiation temperature, skin layer, water, emissivity, heat exchange, atmosphere, air

This article discusses the problems of determining the organs of air respiration on computed tomography images using convolutional neural networks of the U-NET architecture. The prospects of using neural networks in the analysis of medical images, as well as the use of the U-NET architecture for semantic segmentation of images are described. The structure of an artificial neural network based on the U-NET architecture is being formed. The structure of the layers of this network is visualized and the components of this structure are described. Special attention is paid to the description and implementation of the convolution process. The formula for determining the weight coefficients of the separation boundary is presented. Algorithms for the formation of an artificial neural network model and an algorithm for constructing layers are proposed. A method of increasing data for a training sample of images of medical images is considered. The image of the result of the determination of the chest organs and the corresponding mask are presented.

Keywords: convolutional neural networks, U-NET architecture, deep learning, image recognition, machine learning

The problem of atmospheric air pollution in the regions is considered. Attention is paid to the development and implementation of automated air pollution control systems. The developed information and analytical system has a two-level system and consists of two subsystems: a city information system and a regional information system. The proposed software allows you to perform calculations of surface concentrations of pollutants with the formation of a data bank, as well as the construction of maps of pollution in the region and histograms of the distribution of the level of adverse effects of atmospheric pollution on humans.

Keywords: atmospheric air, pollution, monitoring, information and analytical system, maps of the pollution of the region

The dependence of the radio brightness temperature of water on the kinetic temperature in the temperature range of 50-90 degrees Celsius in the gigahertz frequency range has been experimentally investigated. It is established that the change in the radio brightness temperature of the water surface, depending on the kinetic temperature, is essentially nonlinear. The radiocontrast in the studied temperature range makes it possible to effectively detect thermal contrasts of the surfaces of hydro-objects.

Keywords: nonlinearity, kinetic temperature, radiation temperature, water, emissivity, radiocontrast, gigahertz range

The paper discusses the role of humanitarian education in the organizational system in training technical specialists in accordance with the movement towards the sixth techno-economic paradigm. The question is raised about the need to create in the conditions of digitalization, new mechanisms for training and making managerial decisions. The need for creation and development of a new type of thinking, namely projective thinking in the techno-humanitarian environment, is proved. It will increase the enterprise performance. As a result, the main sciences of humanistics were described and the relationships between them were determined, a scheme of direct and reverse projective control was drawn up, and possible ways to achieve the result were described. A conclusion has been drawn regarding the projection of humanitarian values on the technical aspects of thinking.

Keywords: organizational system, techno-economic paradigm, digitalization, education, projective thinking, techno-humanitarian environment, humanism, usefulness

The practical application of NIPU based on epoxy-amine compositions and five-membered CCs in coatings, sealants, adhesives, etc. was largely developed back in the USSR by O. Figovsky &V. Stroganov. Opportunities for optimizing the production of the key component of NIPU, cyclic carbonate, using carbon dioxide are considered. The article discusses sustainable synthesis routes for NIPC for industrial applications. An overview of solutions for the production of foam materials based on non-isocyanate polyurethanes is given.

Keywords: nonisocyanate polyurethanes, oligomeric cyclocarbonates, green solutions

The article analyzes the use of various machines and equipment for performing cultural works in the process of reclamation construction, road construction, soil cultivation for further use in agriculture, forestry production. A new design of replaceable working equipment for removing single stumps is proposed, consisting of a cylindrical knife, a screw and a cleaver. During the production of works, the screw of the working equipment is screwed into the stump by means of a drive. The paper evaluates the economic efficiency of using this equipment in the technological complex of machines, taking into account the cost of work and the timing of their implementation. The analysis carried out on a limited volume of work showed not only a reduction in the cost of work performed by the proposed equipment as part of the Masha technological complex, but also the possibility of reducing the time of work.

Keywords: uprooting technology; single stump; stump cleaver, cylindrical knife