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 The historical reference of the appearance of the formwork is given.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

The article discusses the need for a cost examination in the implementation of investment activities of renovated objects. The article is devoted to the actual problem of renovation of real estate objects. The key stages of technical expertise and methods for assessing the technical condition are investigated to determine the cost indicators of the renovated object. The article is devoted to a comprehensive study of the factor space, which is formed by technical and geo-economic factors and has a significant impact on the cost indicators of an investment renovation project. The article deals with the problem of determining the investment attractiveness and economic efficiency of renovation. The scientific novelty of the work lies in a comprehensive study of the factor space and cost indicators of the renovated object to determine its investment attractiveness.

Keywords: renovation, cost expertise, cost indicators, investment attractiveness, geo-economic and technical factors

The article discusses the methods and ways of protecting the environment by cleaning the exhaust gases of power plants, using the effect of vibration turbulization. The advantages of using jet devices over the use of vibration technology in eco-protective installations are theoretically substantiated.

Keywords: vibration turbulization, environmental protection technologies, energy efficiency

A study of the quality of drinking water (spring and centralized water supply) was conducted. Determination of water hardness and alkalinity was carried out by titrimetric analysis methods in a chemical laboratory. The dependence of these parameters in the autumn and spring period is established. The limits of changes in water hardness values are 3.4-9.9 mmol / l in autumn, 3.2-9.8 mmol / l in spring. Most of the studied natural waters are of medium hardness and hard water, therefore, there is a need for water softening. The limits of change in the alkalinity of water are 0.6 - 5.1 mmol / l in autumn, 0.8-5.3 mmol / l in spring. The alkalinity values of all samples are within the limits of the MPC norms. A comparative analysis of the results of the study is carried out, which establishes the dependence of the hardness and alkalinity of water in different seasons. The values of water hardness decrease during the flood, while the values of alkalinity increase during this period. It is recommended to conduct further research in order to determine the feasibility of using water softening methods for objects where water has high hardness values, and to choose the optimal softening methods.

Keywords: alkalinity, hardness, methods of titrimetric analysis, natural water, softening, autumn period, spring period

In modern times due to the growth of mass production of electronic devices, it becomes necessary to quickly and accurately verify their characteristics. At the same time, device testing, as a rule, includes a set of different types of checks performed at different stages of the production process. In particular, the analog signature analysis method is used for these purposes. It allows you to quickly detect faults at the component level, which makes it useful in various stages of production, such as incoming inspection, testing printed circuit boards or repairing faulty devices. This article discusses the basic principles of the method, as well as the features of its application.

Keywords: analog signature analysis, component level testing, current-voltage characteristic, fault localization

This article presents the existing technologies for implementing ground anchors - inside a casing pipe, without the use of a casing pipe and under using a bentonite clay. As a result, a method for selecting the technology for strengthening the retaining walls has been developed by using injection anchors.

Keywords: excavation, ground anchors, spacer mounts, foundation pit cofferdam, technology of the device

This article proposes the development of a method for fixing changes in the galvanic skin response and human pulse, depending on the viewing of a video fragment, which presumably causes a certain emotional reaction of a person. The creation of a prototype device on the Arduino Leonardo platform and compatible with this platform sensors for fixing galvanic skin response and a human pulse sensor is described, with the help of which data is collected for further use in determining the emotional state of a person.

Keywords: galvanic skin reaction, pulse, emotional state, arduino, emotion

a study of a ventilation system with a local recirculating diffuser was carried out. A three-dimensional model of the office space has been built. Using the STAR-CCM + hydrodynamic computing complex, a numerical simulation of the ventilation system has been performed. The calculation results are analyzed, the advantages of the investigated system are given.

Keywords: ventilation systems, local recirculating diffuser, indoor air quality, energy saving, numerical simulation, STAR-CCM +

Bar structures are widespread in construction due to their economy, freedom of design shapes and sizes. As a result, automation of design and calculation of such structures is an urgent task. As part of the study, the task of developing a software module that generates output documents of a web application for calculating bar metal structures has been implemented. The software is developed on the .NET platform using the Spire.Doc and netDxf plug-in libraries. The developed module generates AutoCAD-compatible drawings and text reports in accordance with Russian standard SP 16.13330. The possibility of automated generation of reports allows more efficient use of the computing complex in production, cost reduction and calculation accuracy increase.

Keywords: Design in construction, bar structure, computing system, web development, report, drawing