The method of compaction of subsident soils by deep explosions is widely used in civil construction of buildings and structures. It is characterized by high efficiency of soil compaction and low financial costs for the production of works. This emphasizes the undoubted advantage of the method in comparison with other analogues. In this paper, some features of constructing a mathematical model of compaction of subsident soils by deep explosions are described. The conditions for the existence and uniqueness of the solution of boundary value problems in the framework of the investigated model are given.

Keywords: subsidence soil, loess, deep explosion, concentrated charge, elongated charge, soil compaction, mathematical model, diffusion equation, boundary value problem, solvability of the model

This article proposes the development of a method for transmitting secure messages using a combination of best practices for organizing data exchange and cryptographic instant messaging protocols using end-to-end encryption. It considers ways of organizing an application using a peer-to-peer network and client-server architecture. It analyzes popular instant messaging protocols using end-to-end encryption. The software components of the application based on the developed method are described.

Keywords: messenger, end-to-end encryption, cryptographic protocol, instant messaging, peer-to-peer network, client-server

This article briefly discusses recurrent neural networks and bidirectional recurrent neural networks. A conditional random field is also described. In particular, we consider the vector representation in the form of the ELMo model, the bidirectional language model and its fine-tuning. A diagram of the architecture of a bidirectional recurrent neural network with CRF is also given.

Keywords: named entity recognition, neural network, word vector representation, language model, conditional random field, neural network architecture, recurrent neural network, natural language processing, bidirectional recurrent neural network

A model for assessing the consumer attractiveness of commercial real estate objects is described on the example of assessing the quality of sports and entertainment centers in the city of Perm. In the course of the study, a sociological survey was conducted to identify the factors that influence the choice of consumers of a sports and entertainment center to visit. The results of the survey became the information base for the model of assessing the quality and consumer attractiveness of the studied objects. Two approaches to the definition of quality were compared – the mechanism of complex assessment and the qualimetric model.

Keywords: commercial real estate management, sports and entertainment centers, integrated assessment mechanisms, management efficiency, quality of commercial real estate, consumer attractiveness, probability of choice, decision trees, convolution matrices

The article discusses the speed and direction of the wind as one of the key factors affecting the spread of carbon monoxide in the linear city of Volgograd. It also investigates the intensity and rolling stock of the traffic flow, which have a negative impact on the pollution of the surface atmospheric layers of the air. Research has been carried out on Raboche-Krestyanskaya street in order to measure the concentration of carbon monoxide on the curb of the roadway.

Keywords: road transport, wind direction, wind speed, meteorological conditions, sources of pollution, highways, residential buildings, meteorological stations

The article presents the results of research of dryung asbestos ores in a suspended layer. Equations are obtained that reflect the effect of the initial moisture content of the ore on the Nusselt criterion. The obtained dependencies can be used for calculating tube-dryers for asbestos ores in a suspended layer.

Keywords: drying, tube-dryer, asbestos ore, suspended layer, moisture content, speed of the material, mass transfer coefficient, Reynolds criterion, Nusselt criterion, criterion equations

When designing vibration machines and calculating their dynamic models, great difficulties are encountered. The presence of contacts of the working body with the medium significantly complicates the determination of the dynamic and kinematic parameters of the oscillatory system. This is due to the fact that different layers of the vibrated medium have different vibration amplitudes, therefore it is necessary to introduce the concept of "mass attachment", which is, as it were, rigidly attached to the working body and vibrates with its amplitude. It is difficult to determine the coefficients of elastic and dissipative resistance of the elements of the oscillatory system. The authors propose an experimental-theoretical method for determining all parameters of an oscillatory two-mass system with two degrees of freedom, which can be easily extended to more complex linear dynamical systems.

Keywords: vibration machines, vibrating system, road-building machines, free vibrations, phase-frequency response

The article discusses an optical vector analyzer with high resolution and high accuracy based on optical double-sideband modulation and stimulated Brillouin scattering. A model of an optical vector analyzer is presented.

Keywords: optical vector analyzer, double-sideband modulation, stimulated Brillouin scattering, fiber Bragg grating with phase shift, simulation, Optisystem

Traditional analytical methods for determining critical forces lead to difficult solutions of transcendental equations, therefore they are not universal and are ineffective for rods with complex design schemes. The proposed numerical-graphical method for determining critical forces, can be easily adapted to complex non-classical problems.

Keywords: Euler problem, rod, critical force, stability, differential equations, boundary conditions, finite difference method, eigenvalues

The paper is devoted to cellular automaton modeling based on the class of cellular automata with the Margolus neighborhood. A simulation of the kinetics of gas emission in the final volume of coal, including: convection, diffusion, sorption, is performed. To organize this kind of evolutionary process, the cell-automaton modeling method was supplemented with the Monte Carlo method.

Keywords: cellular automaton, Margolus neighborhood, Monte Carlo method, diffusion, convection, sorption, porous medium, coal

The main types of formwork systems used in monolithic construction are described. The types of formwork by construction, by the type of concreted structures, by the base material, by turnover, as well as the types of formwork during concreting under different temperature conditions are considered. The historical reference of the appearance of the formwork is given.

Keywords: formwork, frame-monolithic construction, structures, vertical, horizontal, large-panel, small-panel, block, volume-adjustable, heating, inventory formwork

The issues of modeling the interaction of humans and robots in a common operating environment are considered in order to select the optimal parameters of such a system. The context of the application of multi-agent robotic systems (MRTS) is the monitoring of a fire hazardous area. The homogeneous MRTS includes unmanned aerial vehicles (UAVs) that cyclically perform operations of flying around their area of ​​the territory (with identification of fires) in an autonomous mode, returning to the charging base, waiting for charging, charging, returning to their area of ​​responsibility, flying around their area, etc. etc. An operator works in the charging area, to which the UAVs should not approach less than a certain distance. The system is presented as a multi-channel queuing system (in the charging area). A simulation model is constructed that allows, according to the data of many runs, to construct polynomial regression dependences of the quality indicators of the MRTS operation on its parameters, by which to solve the multicriteria problem of choosing the optimal parameters of the MRTS charging terminal.

Keywords: cobots, simulation, unmanned aerial vehicles, queuing system, regression equations, optimization

The article deals with the forecasting of direct material damage to urban areas depending on the number of fires based on official data of the Ministry of Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters, presented in state reports on the state of protection of the population and territories of the Russian Federation from natural and man-made emergencies for five years, based on the model of correlation analysis, which allows us to determine the degree of mutual influence of the parameters under consideration and the linear regression responsible for determining trends for subsequent years. The analysis of the reasons associated with the lack of the possibility of assessing the damage resulting from the fire of the structures of the building or its premises and its subsequent extinguishing in order to increase the economic efficiency of the cost examination during the restoration of real estate is an auxiliary basis for the construction of a correlation-regressive forecasting model.

Keywords: fires, cost assessment, cost of restoration repairs, real estate objects, economic efficiency, statistics, direct material damage, correlation and regression analysis

This article examines the implications of the application of quantum computing in the field of image processing. A basic conversion associated with gray level processing, such as an image negative, is considered. The article shows how this operation can be expressed using quantum formalism. Whether quantum image processing (in some aspects or some specific applications) has an advantage over classical image processing in realistic scenarios remains to be seen. This depends on solving a number of problems, some of which are unique to quantum image processing, such as feature extraction of a quantum image. Some of them are common to quantum algorithms, such as noise processing. Identifying one of them will significantly speed up the study of this field.

Keywords: qubit, quantum circuit, entanglement, quantum circuit, register, quantum recognition, gate, parallelism, interference, quantum computer

This article is devoted to solving the problem of research and development of methods for the functioning of quantum algorithms and models of quantum computing devices. The quantum algorithm, implemented in the work, makes it possible to transform a classical image into a quantum state, isolate boundaries and convert a halftone image to a binary one, shows the possibilities of quantum information theory in the interpretation of classical problems. The aim of the work is computer simulation of a quantum algorithm for solving the problem of transforming a classical image using quantum computing tools and methods, studying existing pattern recognition algorithms and creating an effective recognition model using the properties and methods of quantum computing. The relevance of these studies lies in mathematical and software modeling and implementation of a quantum algorithm for solving classes of problems of a classical nature. The scientific novelty of this area is primarily expressed in the constant updating and supplementation of the field of quantum research in a number of areas, and the computer simulation of quantum physical phenomena and features is poorly covered in the world.

Keywords: quantum algorithm, quantum bit, quantum computing model, quantum circuit, entanglement, quantum circuit, register, quantum recognition, gate, parallelism, interference, quantum computer