Various options for connecting wooden structures are described. Examples of the use of various compounds, the most common today, are described. The advantages and disadvantages of such compounds are analyzed, and the technical characteristics of the elements used are given. Advantages and disadvantages of joints of wooden structures with the use of composite materials are described.

Keywords: wooden structures, joints of wooden structures, analysis, mechanical connections, comparison, load, strength, nagel, cool connection, mating, toothed plates

The article deals with the issue of production of electrode tapes. A mathematical model of the parameters of the electrode tape forming process is described. Mathematical calculations of the porosity, thickness and mass of the active layer are given. A conclusion is made about the composition of the impregnating rolls and the accuracy of dosing fractions. An example of calculating the molding parameters with an active CuO layer is given.

Keywords: electrode tapes, technologies, composite materials, thickness and porosity of the active layer

This work considers the controversial situations in the field of construction control, technical supervision and оbtaining a commissioning permit. The problematic situation, in which there was no (partially or completely) construction control at the construction stage, is considered. The difficulties of obtaining a Conclusion on Compliance in a similar situation and appealing the decision of the technical supervision authorities in court are picked out. Poor elaboration of mechanisms for obtaining a Conclusion on Compliance in the absence of construction control is noted. The shortcomings of the existing document and the lack of a prescribed legal status of the construction and technical expertise are highlighted. The ways of solving the existing problem at the legislative level are offered. Amending the existing legislative framework, reforms of existing or creating new mechanisms for resolving problematic situations in the absence of construction control are suggested as the main solutions.

Keywords: construction control, technical supervision, construction and technical expertise, commissioning, Conclusion on Compliance, amendment to the legislative framework

The article presents an analysis of project management in terms of the construction industry. The specific features of the management of production activities of construction enterprises have been studied and the effectiveness of this management has been determined. The main problems in the field of project management of construction activities are identified, the main of which is the absence in Russian legislation of a single normative act regulating the development and implementation of a project only in the construction sector. The project management methodology was also considered, using the example of the American methods PMBOK and PRINCE2. The authors analyzed the statistical data of domestic companies involved in the development and management of projects in various industries. The results of the study showed that Russian construction companies are not actively involved in project management compared to organizations in other areas of activity.

Keywords: project management, construction companies, project management methodology, production activities, legislation, monitoring

The article deals with the features of the occurrence of hydraulic shocks in urban drainage systems. It is noted that when starting up pumping units, a hydraulic shock can occur if the operational personnel do not comply with the maintenance regulations. Significantly more likely to cause hydraulic shocks when the pump units or the unit suddenly stops. In addition, in long water pipes with a complex profile, there is a high probability of a high vacuum and, accordingly, the occurrence of breaks in the continuous flow of waste liquid. The probability of a hydraulic shock is affected by the method of starting the pumping units. Measures to prevent the occurrence of hydraulic shocks are considered: improving the reliability of external power supply; the use of a combined power supply scheme; the use of check valves with smooth closing and other methods.

Keywords: hydraulic shock, sewage system, pumping station, pressure pipelines, power supply

The most popular methods of reliability control are considered. In this work, attention is paid to an analytical review of methods for assessing the reliability of measured parameters, their advantages and disadvantages. In the process of analyzing statistical information, the types of inaccuracies that arise and the reasons for their appearance have been established. Methods of dealing with unreliability are given using: the method of level processing, a method for assessing the rate of change of a signal, digital filtering. The solution of the problem of detecting implicit unreliability using the support vector machine is shown.

Keywords: measurement uncertainty, implicit uncertainty, time series, sensor, APCS, level processing, Kalman filter, support vector machine

The article is devoted to improving the processing of radon flux density measurement data using mathematical processing. The article considers the influence of construction works on the radon flux density (RDP) indicators. for the purpose of the study, real measurements were taken at a mining and processing plant in the volgograd region. The article presents the construction of histograms and frequency polygons for measurements performed at different stages, as well as graphs of the empirical distribution function of a random variable. They clearly showed the impact of construction, the hypothesis of the influence of clay soils on the radon output from the soil was confirmed, namely, it was proved that the permeability of the near-surface layer of soil is one of the key factors determining the spatial PPR within homogeneous areas, that is, the permeability of near-surface deposits is one of the leading factors determining the distribution of PPR. analysis of the obtained results allows us to conclude that there is a correlation between the calculated data obtained and the data obtained at the measurement input, i.e. relationship of two or more random variables.

Keywords: radon, pollution, ionizing radiation, engineering surveys, random variable, histogram and frequency polygon, empirical distribution

The water recreation industry is actively developing. An individual pool at home is also not uncommon for a long time, because everyone wants to live in comfortable conditions. Modern country houses place the pool on the ground floor of the premises on the plot next to the house. Despite the financial costs and time for maintenance, the health benefits of the pool, as well as the variety of leisure activities through taking water procedures or playing with children, are a very powerful argument in order to arrange a pool at home.The number of pools is increasing and the number of pools built with defects is also increasing. it may be because use low-quality construction materials and reduce their volumes, perform work by unskilled employees, violate the requirements of construction documents of the project. therefore it is necessary to carry out construction and technical examination.

Keywords: construction, swimming pool, construction and technical expertise, regulatory documentation, defects

The paper presents an integrated approach using machine learning methods for choosing a trading strategy on the currency exchange. The presented approach uses the calculation of the linear regression angle coefficient by log return indicators and determination of the BTC/USD currency pair quotes trend in the next period based on the calculated coefficient sign. The feedforward multilayer neural network is used to predict the angle coefficient value in the next ten minute period for the current twenty minute period. The paper proposes a combined approach to the use of machine learning methods for choosing a trading strategy in foreign exchange. The study presents the results of experiments evaluating the practical results of effective and ineffective strategies based on the predicted values ​​of linear regression coefficients.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

This article analyzes the development of competition in the transport services market. The development of a competitive transport services market requires creating conditions for exceeding the level of supply of high-quality transport services over demand, as well as ensuring publicity and information openness of the market in terms of prices and quality of services. This will allow consumers to freely choose transport services, make the "price-quality" mechanism work, and make price and quality the subject of competition. Transport communications unite all territorial entities in the region, which is a necessary condition for the unity of its economic space.

Keywords: the transport services market, competition, the safety of passengers

The article presents the results of studying the effect of the loading of active metal on the physicochemical properties of cobalt catalysts for the Fischer-Tropsch synthesis on a silicate support, promoted with aluminum. Using the BET, XRF, TPR, TPD-H2 methods, it has been established that the optimum cobalt content is 15‒18 wt. %.

Keywords: Fischer-Tropsch synthesis, catalyst, cobalt, active component, loading

Urbanization and increased production have led to the fact that every year the world generates a large amount of plastic waste, which pollutes the environment. Using them in the construction industry will help solve this problem, as well as get profitable solutions in the production of building materials and mixtures.

Keywords: plastic waste, environment, construction, construction materials

The article deals with the issue of automation of technological production of dispersed materials. The mathematical model of dry charge dosing is described. A fast Fourier transform (FFT) method is proposed for the analysis of acoustic emission signals. The conclusion is made about the economic aspect of production and the accuracy of dosing fractions.

Keywords: automation of production, technology, dispersion composition, the method of fast Fourier transform

The article analyzes the current state of digital technologies that have a considerable impact on the technological and socio-economic development of industry, society, and the economy. The modern development of the industry in the model of the World Economic Forum (WEF) corresponds to the level of Industry 4.0, the development of society in the Japanese model is appropriate for the stage of Society 5.0, the development of the world economy, as the authors believe, refer to the stage of Economy 3.0. Various sets of technology, such as SMACT, DARQ, the digital technologies of the seventh wave, along with key technologies that have been emphasized by the companies IDC, Accenture, McKinsey, PwC and BCG, are considered. The reports of the US National Intelligence Council, WEF and UN are analyzed. Having studied lots of such documents, the authors proposed the following eight technologies to consider as key ones: Blockchain, Artificial Intelligence, Big Data, Internet of Things, Robots, 3D Printing, Extended Reality and Cloud Technology.

Keywords: SMACT, DARQ, Blockchain, Artificial Intelligence, Big Data, Internet of Things, Robots, 3D Printing, Extended Reality, Cloud Technology

hydroxyapatite, non-collagenous protein, implant, quantum-chemical analysis, molecular model, one-electron spectrum, vibrational mode, osseointegration.

Keywords: hydroxyapatite, non-collagenous protein, implant, quantum-chemical analysis, molecular model, one-electron spectrum, vibrational mode, osseointegration