This article analyzes two systems of logistics for construction organizations based on the concept of Material Requirements Planning (MRP) and Just-in-Time (JIT). The main advantages and disadvantages of each system were investigated, and which of them are most effective in the current conditions were determined. Possible options for improving MTO systems are considered, as well as recommendations for the introduction of MRP and JIT into the practice of construction organizations to increase efficiency and reduce costs are proposed. The article will be useful for specialists in the field of construction and logistics, as well as for everyone who works in the field of management and optimization of business processes.

Keywords: logistics, Material Requirements Planning concept, Just-in-Time concept, construction project planning

The problem of computing symmetric Hadamard matrices of the Balonin-Siberry construction is considered. To obtain such matrices, a large number of random binary sequences are required to select three of them, which are bound by the requirements of the matrix design. Such sequences are the first rows of three cyclic blocks of Hadamard matrices. The background of the emergence of quantum computing and the advantage of quantum generation of binary sequences for subsequent selection are considered. The calculation of Hadamard matrices is proposed as a test problem for quantum computers, which allows to show quantum superiority.

Keywords: quantum computers, qubits, random number generators, orthogonal matrices, Mersenne matrices, Kronecker product

This article presents the results of a study of the process of decompaction of clay soils when they are used in soil structures. To study this issue, the following factors were chosen: the dimensions of the test samples, the amount of load on the samples, swelling when soils are moistened and shrinkage when they are dried, and the loss of strength of the samples during their decompaction was also estimated. All studies with soils were carried out in laboratory conditions. In the course of the research, dependences of relative decompaction on vertical load and changes in shear forces depending on the degree of moisture during decompaction of soils were obtained. The main conclusions of the work are given.

Keywords: clayey soil, decompaction of soils, mineralogical composition, optimal soil moisture content, density of the soil skeleton

The article contains statistics on the number of destroyed buildings as a result of emergencies that have occurred over the past twenty years. A table has been formed taking into account the factors of selection of the method of erecting buildings.

Keywords: earthquake, construction technology, factor, selection of construction method

The paper considers the operator model of the technological system for the production of caramel, assesses the stability of the subsystems and the content of the technological system. For a consistently stable caramel formation subsystem using the Shewhart map under specific production conditions, an analysis of the stability of the subsystem was carried out.

Keywords: operator model, subsystem, system integrity, process stability, control charts, average values, range

On the basis of the study, an analysis was made of the capacity of the roundabout according to the existing traffic intensity in the city, taking into account the composition of the traffic flow, the main factors affecting the passage of vehicles at the entrance to the self-regulated intersection are given. The possibilities of reducing congestion within the framework of the existing street and road network of the city are analyzed, conclusions and recommendations are given based on the results obtained.

Keywords: traffic capacity, traffic composition, roundabout, design speed, vehicle spacing, center island, load level, congestion, normalized traffic volume, number of lanes, service level

The relevance of forensic construction and technical expertise in the Russian Federation increases with the increase in the level of urbanization and at the same time the community of forensic construction experts with deep knowledge in the construction field obtained as a result of professional education is growing rapidly. The article raises the issues of lagging the level of preparedness of construction experts in procedural matters, in the skills of mastering the art of polemics, in the ability to flawlessly design the results of the examination in the form of an expert opinion. The authors of the article, based on the study of the practice of conducting judicial construction and technical examinations, analyzed the organizational and legal problems arising from the expert in connection with the violation of the principle of unity of form and content during the examination, underestimating the importance of putting evidence in a strict procedural form.

Keywords: construction and technical forensic examination, special knowledge, forensic expert, examination production, examination procedure

The article considers a probabilistic-temporal model for assessing the intelligence protection of a group of unmanned aerial vehicles for military purposes from enemy radio and radio intelligence complexes in service with the US Army, provides analytical expressions and a calculation sequence with examples.

Keywords: intelligence security, a group of unmanned aerial vehicles, the probability of temporary contact, the probability of energy detection, stealth, signal-to-noise ratio, surveillance reconnaissance zone, detailed reconnaissance zone, radio and radio intellig

The paper considers an example of solving a plane problem of the theory of plasticity as applied to concrete, which occurs when an absolutely rigid stamp acts on a concrete base. In this case, the solution was sought in the form of isolines of characteristics, the position of which made it possible to determine the stress state of the foundation. In this case, three areas were distinguished, differing in the stressed state. In the work, it was possible to analyze the effect of friction on the surface of the stamp on the boundaries of these regions and the isolines of stresses in them. Three conditions were considered: friction is absent, friction is constant, friction is proportional to the greater principal stress. The influence of various boundary conditions on the surface of the stamp on the stress state of the concrete base is revealed.

Keywords: concrete, theory of plasticity, plane problem, stress-strain state, stresses, friction, corner punch

The article discusses the development of an automated monitoring system for the lower position of the crusher cone KKD-1500/180-GWP of the processing plant of JSC Lebedinsky GOK based on a contactless inductive position sensor. The purpose of this system is to inform the technological personnel in a timely manner about the irregular lowering of the crusher cone to the lower level, followed by prompt measures to eliminate or repair the crusher hydraulic unit, as well as the constant maintenance of the crushing ore optimal mode with specified quality characteristics in size. The automated monitoring system for the lower position of the crusher cone will reduce the concentrating plant concentrate losses, increase production efficiency by reducing the electricity specific consumption, as well as improve the personnel working conditions.

Keywords: crushing of ferruginous quartzites, enrichment factory, cone crusher, granulometric composition of ore, automated system for monitoring the position of the cone crusher

When conducting quality control, it is necessary to consider the quality of both each individual element of the facade and the quality of the hinged facade as a system. When structuring the review of tools for instrumental quality control of curtain facade systems, their application should be considered according to controlled parameters, which can be divided into two groups. The quality control group of facade system elements combines methods and tools used in quality control of building materials and does not require the contractor to know about the principles of the hinged facade system. The quality control group of the device (assembly) of the hinged facade consists of operations to determine the quality of the operability of the hinged facade system. This group is entirely based on the idea of the work of the hinged facade as a single system. Based on the results of systematization and generalization of data, it was concluded that the current regulatory documentation regulates the use of instrumental control tools, leaving aside the issues of organization that come to the fore when quality control of the hinged facade of a construction object as a whole, when there is a task of choosing and using several tools of instrumental control at the same time. It is these questions that should be the subject of further research.

Keywords: systems of hinged facades, quality control organizations, a systematic approach in the organization, instrumental control, elements of the facade system, the device of the hinged facade, methods and means of control

The article describes the algorithmic realisation of a software module for evidence of learner’s identification in the testing process. The advantage of this module is simple operation, ease of implementation and execution as well as convenience of application by various categories of users. The need for such a module was engendered by the problem of examinee identification during testing in the e-learning system. The technology of program module operation is based on forming questions with the use of information stored in the learner’s personal account; the operation result is demonstrated through confirmation or non-confirmation of the examinee’s identity in real time.

Keywords: distance learning, identification, student testing, software module, learner’s personal account

The article discusses commodity futures price forecasting using a temporal convolutional network. Commodity futures forecasting is an important task for investors and traders because it allows you to predict future prices and the direction of the market. Commodity futures forecasting can be done using a variety of methods and approaches. One such approach is the use of deep learning models, which consists in predicting futures quotes using artificial neural networks. There are many types of neural networks, among them the most popular for the task of processing time series are recurrent neural networks. However, recurrent neural networks have certain disadvantages that a temporal convolutional network does not have. The temporal convolutional network architecture has unique features such as parallel processing of data, extraction of short- and long-term dependencies, and extraction of important features on different time scales. An experiment was conducted to assess the accuracy of predicting the closing price of seven commodity futures using a temporary convolutional network and an ARIMA statistical model with automatic selection of parameters. As a result of the experiment, it was revealed that the temporary convolutional network is superior to the statistical ARIMA model and is a very effective model for forecasting commodity futures. However, despite the high potential of the proposed forecasting model, it is also important to take into account various other analytical methods, such as fundamental analysis and expert opinion.

Keywords: machine learning, temporal convolutional neural network, commodity futures forecasting, commodities, financial time series

The increasing complexities in the development of new fire-protective coatings hinder the attraction of private investments and impede the progress of innovation. The review provides an overall picture of the research and specifically illustrates the extraordinary diversity of their directions and explains the inherent reason for such diversity. The goal of this review is to establish an information foundation for a critical analysis of the feasibility of private investments in developments in this field and to show some possible ways. The wide range of choices for specific components in fire-protective coatings and the diversity of mechanisms they employ result in a factorial number of possible combinations. The variety of properties of these components and the complexity of their interactions make it difficult to assess the outcomes of their selection unequivocally without conducting experiments during the development of new materials. Therefore, confident prediction of the results of new research is extremely challenging. As a consequence, there is a broad spectrum of directions and sub-directions in ongoing developments. Summing up the results of these investigations is further complicated by the difficulty of testing materials for aging parameters and resistance to external influences. The wide range of choices for specific components in fire-protective coatings and the diversity of mechanisms they employ result in a factorial number of possible combinations. The diverse properties of these components and the complexity of their interactions prevent a definitive evaluation of the results of their inclusion in the composition prior to conducting experiments in the development of new materials. Therefore, confident forecasting of the results of new research is extremely challenging. As a consequence, there is a broad range of directions and sub-directions in ongoing developments. Summing up the results of these investigations is further complicated by the difficulty of testing materials for aging parameters and resistance to external influences. The high uncertainty in forecasting the prospects of specific developments stimulates the advancement of simulation methods for compositions and coating manufacturing technologies, as well as the prediction of their effectiveness, etc. However, these methods only provide a partial increase in the reliability of expectations. A more thorough execution of a feasibility study is recommended to substantiate venture investments. One of the additional approaches capable of enhancing its credibility is the utilization of non-traditional specialized methods for researching patent information.

Keywords: fire-protective coatings, specifically illustrates the extraordinary diversity, prospects of specific developments stimulates, simulation methods for compositions and coating manufacturing technologies

The article compares the technologies of methods of building construction in a short time, shows the advantages and disadvantages. A summary table of comparative characteristics of building construction technologies has been formed, the terms of construction of one floor for each method and the limitations of its application have been determined.

Keywords: method of lifting floors and floors, construction technology, monolithic, large-block, frame, volumetric-modular, contour, advantages, disadvantages